ОСВЕТИТЕЛЬНОЕ УСТРОЙСТВО НА ОСНОВЕ ТЕПЛОПРОВОДНОГО ЛИСТА СО СВЕТОРАССЕИВАЮЩИМИ ЧАСТИЦАМИ

Изобретение относится к области осветительных устройств. Раскрыто осветительное устройство (1), содержащее световодный блок (2), содержащий внедренные светорассеивающие и/или светоотражающие частицы (5) и по меньшей мере одну поверхность (3) ввода света, выполненную с возможностью ввода света в световодный блок (2), и по меньшей мере один светоизлучающий элемент (6), расположенный таким образом, что по меньшей мере некоторое количество света, излучаемое из него, вводится в световодный блок (2) через упомянутую поверхность (3) ввода света. Световодный блок (2) содержит средство переноса тепла, выполненное с возможностью переноса тепла, выделяемого при работе по меньшей мере одного светоизлучающего элемента (6) в сторону от по меньшей мере одного светоизлучающего элемента (6), при этом средство переноса тепла расположено таким образом, что по меньшей мере участок корпуса световодного блока (2) имеет абсолютное тепловое сопротивление, равное или меньше 20 К/Вт. Технический результат – минимизация ...

МОДУЛЬ ЗАДНЕЙ ПОДСВЕТКИ И УСТРОЙСТВО ОТОБРАЖЕНИЯ

Изобретение относится к модулю задней подсветки и устройству отображения. Модуль задней подсветки содержит заднюю пластину, по меньшей мере один установочный механизм, расположенный внутри нижней пластины задней пластины, где каждый установочный механизм содержит по меньшей мере один установочный палец и гибкую прокладку, которая соединена с нижней пластиной задней пластины, а каждый установочный палец содержит основную часть и эластичную втулку, обматывающую основную часть, и световодную пластину, снабженную первой выемкой, согласованной с по меньшей мере одним установочным механизмом. Внутренняя стенка первой выемки находится в контакте с эластичной втулкой. Изобретение обеспечивает снижение возможности образования царапин и исключение сдвигов световодной пластины и оптических пленок. 2 н. и 13 з.п. ф-лы, 5 ил.

ОСВЕТИТЕЛЬНАЯ КОНСТРУКЦИЯ

... 1. Осветительная конструкция (1, 1'), содержащая:источник (2) света для генерирования света;элемент (3) рассеивания, выполненный с возможностью латерально рассеивать генерируемый свет в плоскости (S) рассеивания, определенной оптической осью (Ao) источника (2) света и продольной осью (L) элемента (3) рассеивания, чтобы обеспечивать, по существу, однородное количество света на единицу площади в плоскости, ортогональной к плоскости (S) рассеивания и параллельной продольной оси (L) элемента (3) рассеивания, иперенаправляющий свет элемент (4, 5), предусмотренный с собирающей поверхностью, чтобы собирать латерально рассеянный свет, и поверхностью (41, 51) излучения, чтобы излучать собранный свет,причем перенаправляющий свет элемент (4, 5) выполнен с возможностью излучать собранный свет, по существу, однородно от поверхности (41, 51) излучения,поверхность (41, 51) излучения является продольной и плоской, исобирающая поверхность содержит множество отчетливых латеральных зон (40, 40', 40") преломления ...

Beleuchtungseinrichtung, Flüssigkristallvorrichtung, und elektronisches Gerät

Flächenleuchtvorrichtung

Eine Flächenleuchtvorrichtung, die Folgendes aufweist: eine Lichtleiterplatte aus einem lichtdurchlässigen Material, die Licht aufnehmende und Licht emittierende Oberflächen umfasst, eine Lichtquelle, die angeordnet ist, um zu der Licht aufnehmenden Oberfläche zu weisen, und eine Prismenstruktur, die auf der Licht aufnehmenden Oberfläche vorgesehen ist, wobei die Prismenstruktur vielfache Arten von Prismen umfasst, die unterschiedliche Spitzenwinkel besitzen.

Beleuchtungsvorrichtung und Flüssigkristall-Anzeigeeinrichtung

Eine Beleuchtungsvorrichtung zum Beleuchten einer Flüssigkristalltafel mit einer Rahmenfläche und einer von dieser umgebenen effektiven Anzeigefläche ist mit Folgendem versehen: einer Lichtquelle zum Emittieren von Licht; einem optischen Leiter mit einer Lichteintrittsfläche, auf die von der Lichtquelle emittiertes Licht auffallen kann, einer Lichtaustrittsfläche, von der das Licht ausgegeben werden kann, und einem von der Lichteintrittsfläche vorstehenden Vorsprung; und einem Lichtstreuabschnitt zum Streuen von Licht, der über einen Kontaktabschnitt verfügt, der mit dem Vorsprung in Kontakt gebracht werden kann. Der optische Leiter und der Lichtstreuabschnitt sind so positioniert, dass ein Ende des Vorsprungs des optischen Leiters außerhalb der effektiven Anzeigefläche der Flüssigkristalltafel liegt.

Beleuchtungsvorrichtung

Vorrichtung zur Beleuchtung eines Bedienelementes, wobei an einer ersten Seitenfläche eines Lichtleiters eine Lichtquelle angeordnet ist, wobei das Bedienelement an einer zweiten Seitenfläche des Lichtleiters angeordnet ist oder zumindest teilweise über die zweite Seitenfläche hinausragt, wobei die zweite Seitenfläche der ersten Seitenfläche gegenüberliegt, wobei an der zweiten Seitenfläche (4, 44, 56, 87, 168) eine Reflexionsfläche (5, 6, 66, 71, 92, 117, 172) angeordnet ist, wobei Licht von der Lichtquelle (2) zu der Reflexionsfläche abstrahlbar ist, wobei Licht von der Reflexionsfläche (5, 6, 66, 71, 92, 117, 172) zu dem Bedienelement (10, 21, 88, 94, 111, 151, 161) umlenkbar ist, wobei das Bedienelement (10, 21, 88, 94, 111, 151, 161) durch das Licht beleuchtbar ist, wobei das Bedienelement (10, 21, 80, 111) eine Taste ist, vorzugsweise eine Drucktaste, wobei ein Tastenfuß (12, 23, 142) zumindest teilweise in den Lichtleiter (1, 141) hineinragt und wobei Licht aus dem Lichtleiter (1 ...

Improvements in and relating to displays

Optical device

An optical device is disclosed for expanding input light in two dimensions in an augmented reality display. The device comprises a waveguide 12 and three linear diffraction gratings H0, H1, H2. An incident beam from a projector illuminates an input grating H0, preferably with polychromatic light, and the light is coupled into the waveguide 12. The other two gratings H1, H2 are at least partially overlaid on top of one another. Light can be diffracted by one grating H1 into a first diffracted order and towards the other grating H2 which can couple the light out of the waveguide 12 towards a viewer. In another arrangement the crossed gratings H1, H2 may be replaced by a photonic crystal (19, figure 16) having a regular array of pillars (20, figure 16) which create a number of diffraction gratings.

Collimating waveguide apparatus and method

Keyboard illumination apparatus and method

Light guide plate and liquid crystal display apparatus using the same

Optical device

Display device

A display device includes a control component 8 for electrically controlling the intensity of light transmitted through it from a backlight 10. The device has an optical component 8 (in figure 4 this is also the control component) that converts input light with at least one directional property spread uniformly across an input area of the optical component. The converted light is output as light 6 varying in the at least one directional property that was previously uniformly spread. The at least one directional property may be the angular luminance distribution relative to the local normal or the centre angle of the angular luminance distribution relative to the local normal, or the angle of maximum luminance relative to the local normal. The display device may convert input light exhibiting a relatively low directionality across the input area to an output exhibiting a relatively high directionality across the output side. The display device may convert light with a relatively large full ...

COMPACT LIGHTING INSTALLATION AND INDICATOR

BINOCULAR OPTICAL RELAY MECHANISM

SYSTEM AND PROCEDURE FOR THE RADIATION EXTENSION WITH CLOSE FOCUS IN AN INDICATOR PLANT

Optical curvature sensor

Ein Lichtleiter (1) für sensorische Zwecke hat wenigstens einen Riss (2), wobei eine Längsrichtung des Risses zu einer Ausbreitungsrichtung des Lichtleiters (1) einen Einfallswinkel (8) einschließt, und wobei der Riss (2) von zwei Begrenzungsflächen (9) begrenzt wird, die jeweils im Wesentlichen parallel zur Längsrichtung des Risses (2) liegen, wobei die beiden Begrenzungsflächen (9) einen Öffnungswinkel (α) einschließen, und wobei der Öffnungswinkel (α) größer 0° ist.

Multilayer liquid crystal diffractive gratings for redirecting light of wide incident angle ranges

An optical device includes a stack of multiple grating structures, each of which includes a plurality of sublayers of liquid crystal material. Each sublayer of liquid crystal material includes laterally extending repeating units, each formed of a plurality of liquid crystal molecules. The repeating units of the liquid crystal layers are lateral offset from one another, and defined a tilt angle. The grating structures forming the stack of grating structure have tilt angles of different magnitudes. The grating structures may be configured to redirect light of visible or infrared wavelengths. Advantageously, the different tilt angles of the stack of grating structures allows for highly efficient diffraction of light incident on the grating structures at a wide range of incident angles.

Waveguide for an augmented reality or virtual reality display

A waveguide is disclosed for use in an augmented reality or virtual reality display. The waveguide includes a plurality of optical structures (10, 20, 30, 40, 50, 60, 70, 80) exhibiting differences in refractive index from a surrounding waveguide medium. The optical structures are arranged in an array to provide at least two diffractive optical elements (H1, H2) overlaid on one another in the waveguide. Each of the two diffractive optical elements is configured to receive light from an input direction and couple it towards the other diffractive optical element which can then act as an output diffractive optical element, providing outcoupled orders towards a viewer. The optical structures have a shape, when viewed in the plane of the waveguide, comprising a plurality of substantially straight sides having respective normal vectors at different angles and this can effectively reduce the amount of light that is coupled out of the waveguide on first interaction with the optical structures.

METHOD AND SYSTEM FOR BEAM EXPANSION IN A DISPLAY DEVICE

Camouflaged structure and method of camouflaging a structure against a background having a generally uniform composition

Virtual and augmented reality systems and methods

Methods of manufacturing a liquid crystal device including depositing a layer of liquid crystal material on a substrate and imprinting a pattern on the layer of liquid crystal material using an imprint template are disclosed. The liquid crystal material can be jet deposited. The imprint template can include surface relief features, Pancharatnam-Berry Phase Effect (PBPE) structures or diffractive structures. The liquid crystal device manufactured by the methods described herein can be used to manipulate light, such as for beam steering, wavefront shaping, separating wavelengths and/or polarizations, and combining different wavelengths and/or polarizations.

Color separation in waveguides using dichroic filters

An eyepiece for projecting an image to an eye of a viewer includes a first planar waveguide positioned in a first lateral plane, a second planar waveguide positioned in a second lateral plane adjacent the first lateral plane, and a third planar waveguide positioned in a third lateral plane adjacent the second lateral plane. The first waveguide includes a first diffractive optical element (DOE) coupled thereto and disposed at a lateral position. The second waveguide includes a second DOE coupled thereto and disposed at the lateral position. The third waveguide includes a third DOE coupled thereto and disposed at the lateral position. The eyepiece further includes a first optical filter disposed between the first waveguide and the second waveguide at the lateral position, and a second optical filter positioned between the second waveguide and the third waveguide at the lateral position.

Collimating fiber scanner design with inward pointing angles in virtual/augmented reality system

Disclosed is a display subsystem for a virtual image generation system for use by an end user, comprising: a planar waveguide apparatus; an optical fiber having a distal tip affixed relative to the planar waveguide apparatus, and an aperture proximal to the distal tip; at least one light source coupled the optical fiber and configured for emitting light from the aperture of the optical fiber; an optical waveguide input apparatus configured for directing the light from the aperture of the optical fiber down the planar waveguide apparatus, such that the planar waveguide apparatus displays one or more image frames to the end user, wherein the distal tip of the optical fiber is mounted to the planar waveguide apparatus.

LIGHTING APPARATUS AND LIQUID CRYSTAL DISPLAY

A plurality of first light reflection parts 20a in the form of first V-shaped grooves, for reflecting light entering from a first light source 12a and a plurality of light reflection parts 20b in the form of second V-shaped grooves, for reflecting light entering from a second light source 12b are formed, intersection angles .theta.p of the planes of the first V-shaped grooves and the second V-shaped grooves are substantially equal to each other, said plurality of first light reflection parts are formed in at least a region near the end of the linear light conductor, opposite to the end thereof near which the first light source is disposed, and said plurality of second reflection parts are formed in at least a region near the end of the linear light conductor, opposite to the end thereof near which the second light source is disposed.

DIFFRACTIVE WAVEGUIDE ELEMENT AND DIFFRACTIVE WAVEGUIDE DISPLAY

The invention relates to a diffractive waveguide element for a personal display device, the element comprising a display waveguide (10) extending in a waveguide plane, an in-coupling diffractive optical element (31 ) arranged onto or into the display waveguide (10) for diffractively coupling light rays into the display waveguide (10), and an out-coupling diffractive optical element (33) arranged onto or into the display waveguide (10) for coupling the diffractively coupled light rays out of the display waveguide (10). In addition, there is provided a ray multiplier element (12A) optically upstream of the out-coupling diffractive optical element (33), the ray multiplier element (12A) being capable of splitting a light ray incoming to the in-coupling grating (31) into a plurality of parallel rays spatially displaced in the waveguide plane before they enter the out-coupling diffractive optical element (33). The invention additionally relates to waveguide display device.

MULTI-LAYER DIFFRACTIVE EYEPIECE

An eyepiece for projecting an image to an eye of a viewer includes a waveguide configured to propagate light in a first wavelength range, and a grating coupled to a back surface of the waveguide. The grating is configured to diffract a first portion of the light propagating in the waveguide out of a plane of the waveguide toward a first direction, and to diffract a second portion of the light propagating in the waveguide out of the plane of the waveguide toward a second direction opposite to the first direction. The eyepiece furthers include a wavelength-selective reflector coupled to a front surface of the waveguide. The wavelength selective reflector is configured to reflect light in the first wavelength range and transmit light outside the first wavelength range, such that the wavelength-selective reflector reflects at least part of the second portion of the light back toward the first direction.

MODE-SELECTABLE BACKLIGHT, METHOD, AND DISPLAY EMPLOYING DIRECTIONAL SCATTERING FEATURES

A mode-selectable backlight and display employ a plurality of directional scattering features to provide emitted light. The mode-selectable backlight includes a light guide, a first directional scattering feature to provide first emitted light from guided light having a first propagation direction within the light guide in a first operational mode, and a second directional scattering feature to provide second light from guided light having a second propagation direction within the light guide in a second operational mode. The second emitted light comprises a plurality of directional light beams having different principal angular directions from one another and the first propagation direction differing from the second propagation direction. The mode-selectable display further includes a plurality of light sources to provide the guided light and an array of light valves configured to modulate the emitted light as a displayed image.

COLLIMATING FIBER SCANNER DESIGN WITH INWARD POINTING ANGLES IN VIRTUAL/AUGMENTED REALITY SYSTEM

A display subsystem for a virtual image generation system. The display subsystem comprises a planar waveguide apparatus, and an optical fiber having a distal tip affixed relative to the planar waveguide apparatus, and an aperture proximal to the distal tip. The display subsystem further comprises at least one light source coupled the optical fiber and configured for emitting light from the aperture of the optical fiber, and a mechanical drive assembly to which the optical fiber is mounted to the drive assembly. The mechanical drive assembly is configured for displacing the aperture of the optical fiber in accordance with a scan pattern. The display subsystem further comprises an optical waveguide input apparatus configured for directing the light from the aperture of the optical fiber down the planar waveguide apparatus, such that the planar waveguide apparatus displays one or more image frames to the end user.

DISPLAY SYSTEM WITH OPTICAL ELEMENTS FOR IN-COUPLING MULTIPLEXED LIGHT STREAMS

Architectures are provided for selectively incoupling one or more streams of light from a multiplexed light stream into a waveguide. The multiplexed light stream can have light with different characteristics (e.g., different wavelengths and/or different polarizations). The waveguide can comprise in-coupling elements that can selectively couple one or more streams of light from the multiplexed light stream into the waveguide while transmitting one or more other streams of light from the multiplexed light stream.

VIRTUAL AND AUGMENTED REALITY SYSTEMS AND METHODS

Methods of manufacturing a liquid crystal device including depositing a layer of liquid crystal material on a substrate and imprinting a pattern on the layer of liquid crystal material using an imprint template are disclosed. The liquid crystal material can be jet deposited. The imprint template can include surface relief features, Pancharatnam-Berry Phase Effect (PBPE) structures or diffractive structures. The liquid crystal device manufactured by the methods described herein can be used to manipulate light, such as for beam steering, wavefront shaping, separating wavelengths and/or polarizations, and combining different wavelengths and/or polarizations.

EXIT PUPIL EXPANDING DIFFRACTIVE OPTICAL WAVEGUIDING DEVICE

An optical device is disclosed for expanding input light in two dimensions in an augmented reality display. The device comprises a waveguide (12) and three linear diffraction gratings H0, H1, H2. An incident beam from a projector illuminates an input grating H0 with polychromatic light, and the light is coupled into the waveguide (12). The other two gratings H1, H2 are overlaid on top of one another. Light can be diffracted by one grating H1 into a first diffracted order and towards the other grating H2 which can couple the light out of the waveguide (12) towards a viewer. In another arrangement the crossed gratings H1, H2 may be replaced by a photonic crystal (19) having a regular array of pillars (20) which create a number effective diffraction gratings.

Light body structure has light conducting body with light conducting zone, light source close to center of structure, central light entry zone, peripheral output zone

The light body structure has at least one light conducting body (1) with a light conducting zone and at least one light source (3) close to the center of the structure. The light conducting body is a clear transparent plate or shell. Light from the source is mainly coupled into a light entry zone close to the center of the structure and is coupled out again via a light output zone (6) arranged peripherally with regard to the entire structure.

The light guide plate and surface light source device

Front light module

Surface light source device and liquid crystal display device

BACKLIGHT AND DISPLAY DEVICE HAVING A WIDE EFFECTIVE LIGHT EMITTING AREA

PURPOSE: A backlight and display device is provided to widen an effective light emitting area. CONSTITUTION: A pair of first light sources(62) is located in a cross section of an alignment direction. A second light source(64) is located between the first light sources. A direction of the first light sources crosses a direction of the second light source. The first light sources include a first light emitting unit(66). The first light emitting unit is arranged along surroundings and emits three or more colors of different light. The second light source includes a second light emitting unit(68). The second light emitting unit is arranged along surroundings and emits three or more colors of different light. COPYRIGHT KIPO 2013 ...

SURFACE LIGHT SOURCE DEVICE CAPABLE OF ENHANCING THE LUMINESCENT BRIGHTNESS OF AN OPTICAL DISK MAIN BODY

PURPOSE: A surface light source device is provided to prevent the generation of hot spot or brightness by absorbing a light absorption sheet and to induce light which is leaked from a light inducing unit. CONSTITUTION: A light guide plate(34) includes a light incoming area, a light inducing unit, and a light guide plate main body(49). The light guide plate main body is in a light emitting area. A light diffusing plate is put on the upper side of the main body. The prism sheet is presented from the optical disk main body and covers the upper side of a slope surface through an air layer. A plurality of light sources is arranged in the optical surface. COPYRIGHT KIPO 2012 ...

SURFACE LIGHT DEVICE, IMAGE DISPLAY DEVICE AND LIGHT GUIDE PLATE

An LED (5) as a light source is disposed so as to face the incident surface (4) of a light guide plate (3), a light from this LED (5) is incident into the light guide plate (3) from the incident surface (4) of the plate (3) and then propagates through the inside of the plate (3), and the light, having its incident angle with respect to an outgoing surface (6) changed to up to a critical angle during this propagation process, is output from the outgoing surface (6) of the plate (3). In addition, many prism projections (12) extending in a direction away from the vicinity of the incident surface (4) are formed in parallel on at least one of the outgoing surface (6) of the plate (3) and a surface (10) opposite to the former surface. The side-surface side portions (10b) of the prism projections (12) are so formed as to gradually reduce the heights of the projections toward the incident surface (4). Such arrangements restrict an abnormal light emission in the vicinity of the incident surface ...

WEAR-TYPE DISPLAY SYSTEM

PURPOSE: A wear-type display system is provided to improve a structure and to reduce manufacturing costs by minimizing the number of optical devices. CONSTITUTION: A wear-type display system comprises a display panel(500) displaying a received screen signals from a defined signal source through wire or wireless, waveguide(510) transmitting the screen signal supplied from the display panel(500), a first, a second, and a third diffraction gratings(520,522,524) finally controlling a direction of the screen signal so as to front to eyes by diffraction of the screen signal supplied from the waveguide(510), and magnifying glasses(530,532) for magnifying the screen signal entering into the eyes out of the waveguide(510). At this point, the diffraction gratings(520,522,524) are binary, brazing, or multiple diffraction gratings. © KIPO 2003 ...

Privacy display, dual-mode privacy display system, and privacy display method

A privacy display provides a private image exclusively visible within a viewing cone of a viewbox. The privacy display includes a light guide to guide light, a diffraction grating configured to diffractively couple out a portion of the guided light as diffractively coupled-out light and to direct the diffractively coupled-out light into the viewbox, and a light valve array configured to modulate the diffractively coupled-out light to provide the private image. An extent of the viewbox is determined by a collimation factor of the guided light. A dual-mode privacy display system further includes a broad-angle backlight configured to provide broad-angle light to separately provide a public image visible both inside and outside the viewing cone. The private image may be provided in a privacy mode and the public image may be provided in a public mode of the dual-mode privacy display system.

Light guide plate, backlight module and display device

A light guide plate, a backlight module and a display device are described. The light guide plate includes a main body, plural stripe structures and plural light-adjusting structures. The main body includes a light-incident surface and an optical surface connected to the light-incident surface. The stripe structures are disposed on the optical surface. The light-adjusting structures are disposed between the stripe structures. Each of the light-adjusting structures has a first light active surface and a second light active surface. The first light active surface faces towards the light-incident surface, and the second light active surface faces towards a side of the main body opposite to the light-incident surface.

Light guiding film

Display device and processing apparatus of the same

ILLUMINATION DEVICE WITH BUILT-IN LIGHT COUPLER

The invention comprises devices and methods for coupling a light source to a display illumination device. In one embodiment, an illumination device includes a light guide (91) comprising a front surface, a back surface, a light coupling section (92) configured to receive optical energy from a light source (82) in to the light guide through said front surface or said back surface at an angle about normal to the optical energy receiving surface, and further configured to direct light through said light guide, and a light turning section (94) configured to redirect out of the light guide at least a portion of the light received from said light coupling section, said redirected light at an angle about normal to the optical energy receiving surface.

ILLUMINATION SYSTEM, LIGHT-SENSING PLATE AND DISPLAY DEVICE

The illumination system has a plurality of light sources (R, G, B), a light- transmissive light-sensing plate (5) and surface-modification structures (21, 22) provided at a limited number of pre-determined locations on a surface of the light-sensing plate (5). The surface-modification structures divert a portion of the light traveling through the light-sensing plate. The diverted light is guided towards an edge surface (15, 16) of the light-sensing plate, where at least one light sensor (11, 12) senses the diverted light. A first light sensor (11) preferably receives diverted light substantially exclusively from the first surface-modification structures (21), whereas the second light sensor (12) receives diverted light substantially exclusively from the second surface-modification structures (22). Alternatively, the illumination system further comprises a light-mixing chamber having a light-emission window for illuminating a display device, the light-sensing plate being arranged in the ...

LIGHT OPTICAL SYSTEM, ESPECIALLY FOR INFORMATION, ADVERTISING ILLUMINATION OR DECORATIVE PURPOSES

L'invention concerne un système optique lumineux constitué d'au moins une source de lumière et d'au moins un conducteur de lumière et d'au moins un élément optique comprenant: i) un élément d'entrée pour la compression et/ou rectification de la lumière dirigée vers le conducteur de lumière, ii) un injecteur pour introduire la lumière en provenance de la source de lumière (5) dans le conducteur de lumière (2) à travers la surface principale (P) du conducteur de lumière (2) formé d'au moins un injecteur (1) défini par la zone d'entrée (1a) qui dépasse de la surface principale (P) du conducteur de lumière (2), les lignes de la surface de la zone d'entrée (1a) de l'injecteur (1) formant un angle ('alpha') supérieur à 0° et inférieur ou égal à 90° avec la surface principale (P) du conducteur de lumière (2), la zone secondaire (1b) formant un angle ('beta') supérieur à 0° et inférieur à 180° avec la zone d'entrée (1a) et une zone de base (1c) étant identique à une partie de la surface principale ...

FREEFORM NANOSTRUCTURED SURFACE FOR VIRTUAL AND AUGMENTED REALITY NEAR EYE DISPLAY

A near eye display includes at least one of a combiner, a secondary mirror, and a waveguide having a freeform nanostructured surface. The freeform nanostructured surface encompasses a freeform surface, a nanostructured surface or a combination of both the freeform surface and the nanostructured surface. The freeform nanostructured surface can be incorporated into a combiner or a secondary mirror in the near eye display in a compact folded geometry, wherein an anamorphic or freeform optic can be optically intermediate an image source and the freeform nanostructured surface. The nanostructured surface can include a meta-grating operable across the visible spectrum. The meta-grating includes meta-atoms configured to provide a given efficiency at the desired wavelengths in reflection.

THREE-DIMENSIONAL DISPLAY MODULE USING OPTICAL WAVE-GUIDE FOR PROVIDING DIRECTIONAL BACKLIGHTS

The invention discloses a three-dimensional display module using optical wave-guide for providing directional backlights. This display module includes a wave-guide backlight unit with time-sequential directional light sources, a display device, a wavefront modulation device or a light splitting device, and other components. The wave-guide backlight unit with time-sequential directional light sources includes a sequential-switching light-source array, a relay device, and an optical wave-guide device. Each light source of the sequential-switching light-source array provides backlight of corresponding vector characteristics to the display device, making optical message displayed by the display device being guided to the corresponding viewing zone/viewing zones. Through the technology routes of multiple-view-for-one-pupil or/and Maxwellian view, the three-dimensional display module implements displays free from the vergence-accommodation conflict. The introduction of the optical wave-guide ...

Light guide plate and backlight module with the same

A light guide plate includes an incident edge and a plurality of V-shaped grooves. The incident edge includes a tilted surface, a vertical surface, a top surface and a bottom surface. The top surface is configured in parallel with the bottom surface. The top surface joins with an end of the tilted surface. The bottom surface joins with the other end of the tilted surface. The plurality of V-shaped grooves extend in a predetermined direction and are configured on the tilted surface. When the light from a light source strikes on a tilted surface, on which V-shaped grooves make the light diffused, and the diffused light is in conformity on the incident edge, having no hot spot there.

Surface light source device and display

An incidence face is formed at a corner portion of a light guide plate having a generally rectangular emission face, being supplied with primary light form a primary light source. The incidence face has a configuration which obtained by applying undulation-modification to an imaginary incidence face that cuts off the corner portion obliquely. This undulation-modification gives the incidence face first and second incidence regions. The first incidence region is provided with unevenness that produces an inner propagation light having a diverging angle greater than that which would be obtained under an imaginary case where primary light was refracted on incident to the imaginary incidence face. The second incidence region is provided with slopes inclined with respect to the imaginary incidence face, causing the emission face to have a reduced unbalance in brightness. The imaginary incidence face may extend in a direction perpendicular to an imaginary angle-bisector passing a corner point of ...

LIGHTING DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE

A backlight (lighting device) is arranged on a backside of a liquid crystal panel, and comprises an LED, an optical waveguide, a reflective sheet, and a prism sheet. A diffractive optical element (DOE) constituted of a binary concave and convex pattern is formed in an end surface of the optical waveguide on an LED arranged side.

Side-collecting lightguide

A plate collects light and guides it to an internal focus (20). The plate is constructed of prisms (2) that allow simultaneous reflection and transmission of light. The prisms are easily mass-produced. The prismatic plate can be formed into many shapes.

Luminaire device

An optical device for collecting light and selectively outputting or concentrating the light. A layer has an optical index of referaction n1, and top, bottom and side surfaces defining an angel of inclination φ. A back surface spans the top, bottom and side surface. A first layer is coupled to the bottom surface of the layer and has an index of refraction n2. The first layer index n2 causes light input through the back surface of the layer to be preferentially output into the first layer. A second layer is coupled to the bottom of the first layer and selectively causes output of light into ambient. Additional layers, such as alight polarization layer, a polarization converting layer and a post LCD diffuser layer can be used to make preferential use of polarized light of diffuse light having passed through the LCD layer to enhance viewing of the output light.

Light source device, illumination device liquid crystal device and electronic apparatus

A light source device 41 A, 41 B or 41 C comprising a lens 44 A, 44 B or 44 C which receives light from a light emitting device 43 such as LED. The lens 44 A is a lens having the property that the directivity of exiting light in the Y direction is higher than the directivity in the X direction perpendicular to the Y direction. Namely, the light emitted from the light emitting device 43 is condensed in a narrow angular range in the Y direction, and is scattered in a wide angular range in the X direction. When the light source device 41 A is used as a light source of an illumination device of a liquid crystal device, the height direction of a light guide in which the dimension is small coincides with the Y direction, and the width direction of the light guide in which the dimension is large coincides with the X direction.

SURFACE LIGHT SOURCE DEVICE

In a light guide plate 63, a light introducing unit 65 having a thickness larger than that of a light guide plate body 64 is provided at an end of the light guide plate body 64. A point source of light 62 is placed so as to face an end face of the light introducing unit 65 (a light incident end face 66) . The light introducing unit 65 has a protruding portion in a shape of a half of a frustum of a cone protruding from a surface on the light guide plate 63 to have a large thickness, and the protruding portion has an outer perimeter surface forming an inclined surface 67. On the inclined surface 67, V-groove structures 68a are arranged along the outer perimeter surface of the protruding portion to configure a directivity conversion pattern 68. Furthermore, on an inner perimeter portion of the directivity conversion pattern 68, an auxiliary inclined surface 71 having an angle of inclination smaller than the angle of inclination of the inclined surface 67 is formed along an inner perimeter ...

Light guiding device for vehicle lighting

A light guiding device for vehicle lighting system includes a tube having a serrated surface composed of a plurality of segment surfaces and a reflection member is located beside the serrated surface at a distance. A light source is connected with the tube and emits light beams. The light beams are refracted by the segment surfaces and some of the light beams reflected by the segment surfaces due to narrow input angles will be reflected by the reflection member and travels toward the tube so that the head light has an even illumination with less dark area.

LIGHT GUIDE PLATE, BACKLIGHT MODULE OF LIQUID CRYSTAL DISPLAY PANEL, AND DEVICE FOR MANUFACTURING LIGHT GUIDE PLATE

Disclosed are a light guide plate, a backlight module of a liquid crystal display device, and a device for manufacturing the light guide plate. The light guide plate comprises a first surface and a second surface parallel with each other, wherein the first surface is formed with parallel columnar projections, and the second surface is formed with light guide ports. The light guide plate has a better light convergence effect compared with an existing light guide plate. As a result, light crosstalk in the light guide plate can be significantly attenuated.

Lighting device and liquid crystal display device

A backlight (lighting device) is arranged on a backside of a liquid crystal panel, and comprises an LED, an optical waveguide, a reflective sheet, and a prism sheet. A diffractive optical element (DOE) constituted of a binary concave and convex pattern is formed in an end surface of the optical waveguide on an LED arranged side.

DOUBLE-SIDED IMAGING LIGHT GUIDE WITH EMBEDDED DICHROIC FILTERS

An imaging light guide has a waveguide formed as a coated substrate having first and second surface coatings. A first in-coupling diffractive optic on the first coating directs diffracted light of a first wavelength range into the waveguide along a first direction. A second in-coupling diffractive optic on the second coating directs diffracted light of a second wavelength range into the waveguide along a second different direction. A first dichroic patch between the first surface of the substrate and the first surface coating for (a) transmitting the first wavelength range, (b) transmitting the second wavelength range through a range of incidence angles, and (c) reflecting the second wavelength range through a higher range of incidence angles. A second dichroic patch between the second surface of the substrate and the second surface coating for transmitting the second wavelength range and reflecting the first wavelength range.

BACKLIGHT ASSEMBLY AND DISPLAY DEVICE

The present disclosure relates to a field of optical technology, and discloses a backlight assembly and a display device. The backlight assembly includes a frame, an optical film, a light guide plate and a fixing structure; the optical film is located on a light-emitting side of the light guide plate, and the frame is located on a side of the optical film; the fixing structure comprises a first fixing sub-structure on the optical film and a second fixing sub-structure on the frame, and the first fixing sub-structure is engaged with the second fixing sub-structure. 1. A backlight assembly , comprising:a frame, an optical film, a light guide plate and a fixing structure;wherein the optical film is located on a light-emitting side of the light guide plate, and the frame is located on a side surface of the optical film; andwherein the fixing structure comprises a first fixing sub-structure on the optical film and a second fixing sub-structure on the frame, and the first fixing sub-structure is engaged with the second fixing sub-structure.2. The backlight assembly according to claim 1 , whereinthe frame comprises a strip frame and a strip-shaped extension structure on a side surface of the strip frame, an edge of the optical film is located in a bent area formed by a side of the strip frame and a side of the strip-shaped extension structure; andthe first fixing sub-structure comprises lugs at at least one end of the optical film, and each of the lugs is provided with a groove at a side thereof facing away from the light guide plate; the second fixing sub-structure comprises protrusions on a side of the strip-shaped extension structure, and the protrusions are engaged in the grooves.3. The backlight assembly according to claim 2 , wherein the backlight assembly further comprises:a back plate comprising a bottom plate and a strip structure at at least one end of the bottom plate, andwherein the light guide plate is located between the optical film and the bottom plate, and ...

Systems, devices, and methods for curved waveguides integrated with curved eyeglass lenses

WHUDs that employ such curved transparent combiners are also described.

COLOR SEPARATION IN PLANAR WAVEGUIDES USING DICHROIC FILTERS

An eyepiece for projecting an image to an eye of a viewer includes a first planar waveguide positioned in a first lateral plane, a second planar waveguide positioned in a second lateral plane adjacent the first lateral plane, and a third planar waveguide positioned in a third lateral plane adjacent the second lateral plane. The first waveguide includes a first diffractive optical element (DOE) coupled thereto and disposed at a lateral position. The second waveguide includes a second DOE coupled thereto and disposed at the lateral position. The third waveguide includes a third DOE coupled thereto and disposed at the lateral position. The eyepiece further includes a first optical filter disposed between the first waveguide and the second waveguide at the lateral position, and a second optical filter positioned between the second waveguide and the third waveguide at the lateral position.

LED BACKLIGHT ASSEMBLY SUITABLE OF MIDDLE OR SMALL SIZE LCD DISPLAY

An LED backlight assembly suitable of middle or small size LCD displays comprises a light guiding plate; two LED lighting bars; a reflecting film; a light dispersing film; two parallel prism films installed on an upper side of the light dispersing film; each prism film being formed with a plurality of parallel prism posts; and a light enhancing polarizing film. A diagonal line of the LED backlight plate is smaller than 12 inches. In use, an LCD display is arranged on an upper side of the light enhancing polarizing film so that the light from the LED backlight plate is incident into the LCD display to have a light effect. The two lateral sides of the light guiding plate near the two LED lighting bars are arranged with textures for concentrating light from the LED lighting bars.

KEYBOARD

In a keyboard, a keybutton opposes an operation detection portion. A light source is provided on an outer side of the operation detection portion. A light guide member guides light from the light source to a keytop of the keybutton. The light guide member includes an incident portion opposing the light source, an emitting portion opposing the keytop, and a guide portion which guides the light incident from the incident portion to the emitting portion. An incident surface of the incident portion is formed in a shape of a curved surface that protrudes to the light source side. 1. A keyboard comprising:a housing which supports a keybutton to be capable of reciprocating in an operating direction of the keybutton; anda substrate on which an operation detection portion of the keybutton is provided,wherein the keybutton supported by the housing is disposed to oppose the operation detection portion on an axial line along the operating direction of the keybutton,wherein a light source is provided further on an outer side than the operation detection portion on the substrate when the light source is viewed from the axial direction of the axial line,wherein a light guide member which guides light from the light source to a keytop of the keybutton is formed of a material having a refractive index which is higher than a refractive index of the air, and the light guide member is provided in the housing,wherein the light guide member includes an incident portion disposed to oppose the light source in the axial direction of the axial line, an emitting portion disposed to oppose the keytop at a position hidden by the keybutton when the emitting portion is viewed from the axial direction of the axial line, and a guide portion which guides the light, from the light source, incident from the incident portion to the emitting portion, andwherein an incident surface of the incident portion which opposes the light source is formed in a shape of a curved surface that protrudes to the light ...

LIGHT GUIDE PLATE, AND BACKLIGHT UNIT AND MOBILE DEVICE INCLUDING THE SAME

A light guide plate in accordance with various embodiments comprises: a body having a light incident part at a first side surface of the body; an upper optical pattern at a top side of the body; and a lower optical pattern at a bottom side of the body, wherein the lower optical pattern is an embossed pattern protruding from the bottom side of the body and having a trapezoid shape, wherein a first end of the trapezoid shape has a first width and a second end of the trapezoid shape has a second width, wherein the first end is closer to the light incident part than the second end, and wherein the first width is narrower than the second width.

DISPLAY DEVICE

The present disclosure provides a display device including a display panel; a collimation unit located on a light emergent side of the display panel and configured to convert emergent light in the same position of the display panel into parallel light beams in the same direction; a light waveguide unit, which is located on one side of the collimation unit away from the display panel, includes a light incident surface and a light emergent surface opposite to the collimation unit, and is configured to cause the parallel light beams to be emergent from at least two positions of the light emergent surface; and an imaging unit opposite to the light emergent surface of the light waveguide unit and configured to converge the parallel light beams emergent from the at least two positions on the light emergent surface of the light waveguide unit into a real image point.

Device for reducing dark lines on light scattering guide plate

A device for reducing the dark lines on a light scattering guide plate according to the present invention comprises a light scattering guide plate and at least one vein is disposed on a part of the surface of the light incident side thereof. At least one light tube is installed at the outer end of light incident side of the guide plate and a reflecting cover used to cover the light tubes is installed at the light incident side of the guide plate. Therefore, a beam can be scattered or converged to cause the dark lines around the light incident side to be shrunk or weakened effectively to enhance the light uniformity of the entire guide plate.

APPARATUS FOR TAKING CLOSE-UP PICTURE USING MOBILE TERMINAL EQUIPPED WITH CAMERA, AND EXTERIOR OPTICAL MODULE FOR TAKING CLOSE-UP PICTURE

Provided is an apparatus for taking close-up pictures using a mobile terminal equipped with a camera and an exterior optical module for taking close-up pictures. The exterior optical module according to the present invention is characterized in that it is possible to take close-up pictures of even subjects within the shortest photographing distance of a camera part embedded in a typical mobile terminal, and the light source embedded in the mobile terminal is used without using a separate external light source. By providing an optical zoom through a separate exterior lens, it is possible to apply the present invention in cases where a magnified image is required, such as for the inspection of the skin tissues, in a portable microscope function, or the like. The mobile terminal becomes an apparatus for taking close-up pictures through an exterior optical module mounted thereon.

Liquid crystal display device

Provided is a liquid crystal display device including: an optical switching member; a light guide panel; and a light source, the light guide panel including, on at least one of a front surface and a back surface thereof, a plurality of surface structures including: a first raised surface extending outward being formed as a free surface; a first light reflection surface entering inside from the first raised surface; a second light reflection surface extending outside from the first light reflection surface; and a second raised surface which continues from the second light reflection surface and is formed as a free surface, whereby a liquid crystal display device may be obtained, which includes a thin light guide panel with a thickness of, for example, 1 mm or less.

Surface emitting light source with lateral variant refractive index profile

A micro-LED includes a light emitting device that emits a light beam surface—normally and a plurality of semiconductor layers that modify the light beam. Each semiconductor layer includes a first lateral region and a second lateral region, where the first lateral region and the second lateral region are characterized by different respective refractive indices. The first lateral regions of the plurality of semiconductor layers are arranged in two or more different lateral areas of the semiconductor light source. The second lateral region in each semiconductor layer of the plurality of semiconductor layers includes a semiconductor material with a different respective composition. The plurality of semiconductor layers form a planar optical component that is used to, for example, collimate, converge, diverge, or deflect the light beam emitted by the light emitting device.

FUNCTIONALIZED WAVEGUIDE FOR A DETECTOR SYSTEM AND A LIGHTING AND/OR PROJECTION SYSTEM

A functionalized waveguide for a detector system and a lighting and/or projection system includes a transparent base body. A first outcoupling region deflects at least a part of the incoupled radiation hitting the first outcoupling region, such that the deflected part exits the base body via a front side or a rear side thereof in order to hit the detector system. The extent of the first incoupling region in a second direction perpendicular to a first direction is greater than the extent of the first outcoupling region in the second direction. The base body has a second outcoupling region, which deflects at least a part of light from a light source or image source hitting the second outcoupling region as illuminating radiation, such that the deflected part is used for illumination and/or projection.

Image display device

An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided.

SURFACE LIGHT SOURCE DEVICE AND APPARATUS USING THIS DEVICE

Wearable display system comprising a waveguide

A wearable display system having a display panel for outputting a signal processed a predetermined way is provided. The system includes: at least one waveguide (510) for guiding the propagation of at least one signal output from at least one display panel (520); a plurality of gratings (520,522,524) for diffracting the at least one signal propagating through the at least one waveguide; and at least one magnifying lens (530,532) for magnifying the at least one signal diffracted by the grating. According to the system, a more light weight and compact wearable display system can be realized by minimizing the number of optical components, and the complexity and cost in manufacturing a display system can be reduced. In addition, a display system can be produced on a large scale by incorporating a waveguide, gratings and an eyepiece into one single body, and further, chromatic aberration can be removed by conjugate gratings.

METHOD AND SYSTEM FOR BEAM EXPANSION IN DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide a method of improving the color uniformity in light distribution in an exit pupil extender. SOLUTION: In an optical device, comprising a substantially planar light-guiding member 60 having a first surface 32 and an second surface 52; and a light coupling means, wherein light waves are guided within the light guiding member based substantially on successive internal reflections as the light waves travel between the first surface 32 and the second surface 52, the light waves comprise at least first light waves of a first color and second light waves of a different second color, and the first light waves are internally reflected at a first reflection angle and the second light waves are internally reflected at a second reflection angle greater than the first reflection angle with respect to the vertical surface of the first surface or the second surface, the optical device is characterized by at least one substantially planar interface provided between the ...

SURFACE-FORMED LIGHTSOURCE DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE PROVIDED WITH THE SAME

PROBLEM TO BE SOLVED: To obtain an eco-friendly and inexpensive surface-formed lightsource device in which unevenness of chromaticity/brightness is not generated, and which can cope with realization of a narrower frame of a display device. SOLUTION: Between an LED substrate 2 and an incident light face 1c of a light guide plate 1, a sheet-formed prism member 5 made of a transparent resin is arranged. The prism member 5 is formed by ranging plural nearly triangular minute prisms in which a cross-sectional face being parallel with the light-emitting face 1a of the light guide plate 1 has its vertex at the LED substrate 2 side, and makes light emitted from an LED 3 reflected and dispersed to both sides of the longitudinal direction x of the incident light face 1c, and make it incident into the incident light face 1c. The vertices are 90±20 degree, edge lines of the respective prisms are tilted 30 to 90 degree against the longitudinal direction of the incident light face 1c and arranged. By ...

LIGHT GUIDE PLATE

PROBLEM TO BE SOLVED: To improve the problem of the luminance of illuminating light which is generated from a light guide plate becomes ununiform, depending on the place when a light-emitting source, such as an LED is arranged extremely close to the light guide plate in order to raise luminance of illuminating light in a surface illuminant source of an edge light system. SOLUTION: In the light guide plate 1, which is composed of a plate-like translucent material and which exits surface illuminating light 15 from the main surface 1b to an object 7 to be illuminated by changing the optical path of light from the light-emitting source 2 arranged facing the side surface, projecting and recessing parts are provided in the side surface 1c of the light guide plate facing the light-emitting source 2. COPYRIGHT: (C)2002,JPO ...

СОСТАВНОЙ РАСШИРИТЕЛЬ ВЫХОДНОГО ЗРАЧКА

... 1. Устройство, включающее !составную подложку из оптического материала, имеющую первую поверхность и вторую поверхность, причем указанная составная подложка включает первую часть и вторую часть, которые физически разделены и установлены с возможностью поворота относительно друг друга в заранее заданном диапазоне углов вокруг линии, разделяющей первую и вторую части; ! два дифракционных элемента, расположенных на первой или второй поверхности и установленных с возможностью приема входного оптического пучка, причем один из двух дифракционных элементов расположен на первой части подложки, а второй дифракционный элемент расположен на второй части подложки соответственно, и указанные два дифракционных элемента расположены, по существу, рядом друг с другом и прилегают к указанной линии, разделяющей первую и вторую части подложки; и ! два дополнительных дифракционных элемента, расположенных на первой или второй поверхности подложки, причем один из двух дополнительных дифракционных элементов расположен ...

LICHTLEITERPLATTE UND DIESE VERWENDENDE FLÜSSIGKRISTALL-ANZEIGEVORRICHTUNG

Licht kann mittels Streuen des Lichts in dem mittels eines oberen Gehäuses abgeschirmten Umrandungsbereichs (BA) in dem Umrandungsbereich (BA) oder mittels Bereitstellens einer optischen Struktur zur Lichtbündelung gleichmäßig verteilt werden. Dementsprechend ist die Helligkeit des Lichts an allen Positionen an der Grenze zwischen dem Umrandungsbereich (BA) und dem Anzeigebereich (DA) ähnlich, wodurch das durch einen von der Position abhängigen Helligkeitsunterschied verursachte Hot-Spot-Problem gelöst wird.

Lighting systems including lens modules for selectable light distribution

Collimating waveguide apparatus and method

Panel Light Modules

... 1,199,602. Lamps. E. W. BLISS CO. 15 May, 1967 [19 May, 1966], No. 22449/67. Heading F4R. A panel light module comprises one or more light bulbs embedded in polyester resin contained in a sleeve which transmits light through one of its ends. The polyester serves as a lens and as a support for the bulb, and is preferably dyed to act as a light filter. In Fig. 4A an aluminium sleeve 322 contains two bulbs 318 each in a separate compartment separated by an opaque divider 324. The polyester 320 and 326 is dyed yellow and the upper surface 330 of the module is roughened to produce a diffusing effect. The inner walls of the sleeve act as a reflector and heat sink. Each section of the upper surface 330 is masked to provide two arrow-heads which will appear yellow when the appropriate bulb is energized (Fig. 4B, not shown). In a modification (Figs. 5A, 5B, not shown) one compartment has two bulbs and the mask is rectangular; green polyester is used. In another form (Figs. 6A, 6B, not shown) the ...

Display for use in an augmented reality or virtual reality device

Waveguide for an augmented reality or virtual reality display

Lichtkopplungsschutz zwischen Lichtfunktionen

Disclosed is a light guiding element (1) for an illumination unit, comprising a light guiding member (5) that has at least one light-incident surface (2) and at least one light-emergent surface (3). The at least one light-incident surface (2) includes a plurality of light-incident partial surfaces (2a) which are offset relative to one another at least in the direction of light propagation (-x) and which are oriented substantially perpendicular to the direction of light propagation (-x).

FLÄCHENFÖRMIGE SOURCE OF LIGHT DEVICE AND THIS DEVICE USING MECHANISM

LIGHTING INSTALLATION, USE OF A PLATE FOR LIGHT DETECTION IN A LIGHTING INSTALLATION AND AN INDICATOR

Light optical system, especially for information, advertising illumination or decorative purposes

Stacked waveguides having different diffraction gratings for combined field of view

In one aspect, an optical device comprises a plurality of waveguides formed over one another and having formed thereon respective diffraction gratings, wherein the respective diffraction gratings are configured to diffract visible light incident thereon into respective waveguides, such that visible light diffracted into the respective waveguides propagates therewithin. The respective diffraction gratings are configured to diffract the visible light into the respective waveguides within respective field of views (FOVs) with respect to layer normal directions of the respective waveguides. The respective FOVs are such that the plurality of waveguides are configured to diffract the visible light within a combined FOV that is continuous and greater than each of the respective FOVs.

Illumination ring

Exit pupil expanding diffractive optical waveguiding device

An optical device is disclosed for expanding input light in two dimensions in an augmented reality display. The device comprises a waveguide (12) and three linear diffraction gratings H0, H1, H2. An incident beam from a projector illuminates an input grating H0 with polychromatic light, and the light is coupled into the waveguide (12). The other two gratings H1, H2 are overlaid on top of one another. Light can be diffracted by one grating H1 into a first diffracted order and towards the other grating H2 which can couple the light out of the waveguide (12) towards a viewer. In another arrangement the crossed gratings H1, H2 may be replaced by a photonic crystal (19) having a regular array of pillars (20) which create a number effective diffraction gratings.

Optical see-through display element and device utilizing such element

The invention relates to an optical see-through display element and a display device using such element. The element comprises a transparent substrate (10) comprising two opposite faces, an in-coupling structure (12) for coupling light into the substrate, and a diffractive outcoupling grating structure (14, 16) arranged on the transparent substrate for displaying the incoupled light on the transparent substrate. According to the invention, the diffractive outcoupling structure (14, 16) comprises at least two multi-layer gratings superimposed on top of each other on at least one of said opposite faces of the substrate. In particular, multilayer gratings reducing diffraction of transmissive light can be used. The invention helps to increase the out-coupling efficiency of diffractive displays and provides also technology to simultaneously maintain high image quality and transparency.

WAVEGUIDE MANAGING HIGH POWER DENSITY

A waveguide includes a light coupling portion has an interior surface and an exterior surface. The exterior surface includes light coupling features. LEDs emit light into the light coupling features. A light emitting portion has an interior surface and an exterior surface where the exterior surface defines a light emitting surface. The light emitting portion is disposed adjacent the light coupling portion. A light transmission portion optically couples the light coupling portion to the light emitting portion. A footprint of the light coupling portion is substantially the same or less than a footprint of the light emitting portion.

PAIRING WITH COMPANION DEVICE

Disclosed herein are systems and methods for device authentication or pairing. In an aspect, a wearable display system comprises a display, an image capture device configured to capture images of a companion device, a computer-readable storage medium configured to store the images of the companion device, and a processor in communication with the image capture device and the storage medium. The processor can be programmed with executable instructions to receive a first image of a first optical pattern displayed by the companion device captured by the image capture device, wherein the first optical pattern is generated by the companion device based on first shared data, extract first data from the first optical pattern in the received first image, authenticate the companion device based on the first data extracted from the first optical pattern, and notify a user of the wearable display system that the companion device is authenticated.

Fingerprint palm print image collector of honeycomb structure and terminal device

Backlight assembly removing dark areas and display device provided with the same

Uniform reflective light-guide apparatus with micro-structure, and backlight module and LCD device having the same

A uniform reflective light-guide for accompanying an edge light source to form a backlight module for an LCD display includes a light-guiding layer and a reflective layer. The light-guiding layer further defines a light-introducing surface and a light-exiting surface. The light-introducing surface is to allow lights emitted from the edge light source to enter the light-guiding layer. The light-exiting surface perpendicular to the light-introducing surface is to allow at least a portion of the lights to leave the light-guiding layer. The reflective layer is to reflect the incident lights back to the light-guiding layer. The reflective layer and the light-guiding layer are manufactured integrally into a unique piece by a co-extrusion process so as to avoid possible existence of an air spacing in between. A reflective surface is defined to interface the reflective layer and the light-guiding layer, and a three-dimensional micro-structure is constructed on the reflective surface.

Collimating waveguide apparatus and method

A collimating waveguide, an optical backlight apparatus, and a method of producing a collimated beam of radiant electromagnetic energy are disclosed. A collimating waveguide comprises an input surface to receive radiant electromagnetic energy from a point source and an output surface to emit an output beam of substantially collimated radiant electromagnetic energy. A first collimating surface of the waveguide receives a beam of the radiant electromagnetic energy entering from the input surface traveling in a first direction and reflects the radiant electromagnetic energy into a substantially collimated beam of radiant electromagnetic energy traveling in a second direction, which is the reverse of the first direction. A second collimating surface of the waveguide receives the substantially collimated beam of radiant electromagnetic energy and to redirect the substantially collimated beam toward the output surface. An optical backlight apparatus comprises a reflective cavity to receive the collimating waveguide and a diffuser located over the output surface of the collimating waveguide.

Light guide device and backlight module

The backlight module comprises a light guide device, pluralities of light sources and at least one optical film. The light guide device further contains body, first microstructures, second microstructures, flat portions and diffusive beads. The first microstructures are disposed on reflective surface. A first point and a second point are disposed at two ends of the first microstructure with a first width (P 1 ). Each flat portion has a gap (G) defined between two adjacent first microstructures. The second microstructure connects to the body by means of two edge portions. Two edge portions have a second width (P 2 ) defined on the incident surface; wherein a first depth (H 1 ) is defined to be the distance between the crossing point of two edge portions away from the incident surface. Pluralities of diffusive beads have weight M b . The body has weight M t . Then the equations of H 1 P 2 * P 1 G ≤ 0.288 and H 1 P 2 * P 1 G * M t M b ≤ 96.0 are satisfied.

Surface light source apparatus and display apparatus using same

A surface light source apparatus capable of keeping a high in-plane brightness uniformity and a high light utilization efficiency without increasing the size of a frame, and also to provide a display apparatus including the surface light source apparatus. The surface light source apparatus includes a point light source, and a light guide plate having a hole formed near first side surface that is one side surface thereof, the hole being formed at a position where the point light source is to be arranged. The first side surface of the light guide plate has, in a portion thereof near the hole, a prism having a saw-toothed shape in a cross-section thereof parallel to a front surface of the light guide plate.

Illumination apparatus

This invention relates to an illumination apparatus. The illumination apparatus comprises a light guide plate and a light source configured to emit light into the light guide plate through a first surface, and the light guide plate comprises a concentrator configured to direct incident light in the light guide plate so as to radiate in a direction substantially parallel to a preset plane. The preset plane is perpendicular to any one of the top surface and bottom surface of the light guide plate, and intersects the first surface and a second surface of the light guide plate or intersects the first surface and one of the side surfaces at an angle that is substantially larger than the critical angle of a total reflection. In this way, unwanted light loss in the light guide plate is reduced, and the distribution of the light intensity or luminance along the light guide plate is improved, i.e., a substantially uniform distribution of the light intensity can be achieved.

Light guide with uniform light distribution

This disclosure provides systems, methods and apparatus for providing illumination by using a light guide to distribute light. In one aspect, the light guide has a light input edge into which light is injected and transverse edges transverse to the light input edge. The transverse edges are smooth and act as specular reflectors. The light input edge is rough and provides a diffusive interface. The light emitters are adjacent and centered along the light input edge, with the pitch of the light emitters being about ΔL, where ΔL is the distance between the transverse edges divided by the number of light emitters. The light guide can be provided with light turning features that redirect light out of the light guide. In some implementations, the redirected light can be applied to illuminate a display.

Light bulb with adjustable light output

A light bulb includes a base, light guide, and light source. The base is configured to mechanically mount the light bulb and receive electrical power. The light guide includes light input regions, at least one of the light input regions associated with an optical modifying characteristic, the light guide configured to propagate light by total internal reflection. The light source is located adjacent the light input regions. The light source and light input regions are variably positionable relative to one another to vary location at which light is incident on the light input regions such that light emitted from the light source is selectively apportioned between the light input regions. A characteristic of the light output from the light bulb is modified based on the optical modifying characteristic of the at least one of the light input regions and the relative positioning of the light source and light input regions.

Electronic device

Provided is an electronic device including a small-area solar power generation system which is capable of efficiently generating power. A mobile device ( 10 ) includes: an optical module ( 2 ); and a storage section ( 1 ), the optical module ( 2 ) including: a light guide section which has a light receiving surface for receiving light from outside and guides the light thus received; and a solar cell element which is provided on an end face of the light guide section, the end face intersecting the light receiving surface, and receives the light thus guided through the light guide section, and the storage section ( 1 ) storing the optical module ( 2 ) so that the optical module can be drawn out from the storage section.

Planar light source apparatus and display apparatus using same

A planar light source apparatus includes a point light source and a light guide plate shaped like a flat plate with a rectangular shape in a plan view. The light guide plate includes an output surface confronting an opening portion, a pair of second side surfaces opposed to each other, and a hole opening in a non-output surface and formed near one of the first side surfaces at a position where the point light source is to be arranged. Each of the pair of second side surfaces is at least partially configured as a prism whose ridge line extends in a direction perpendicular to the output surface and whose cross-section, when sectioned in a direction parallel to the output surface, has a sawtooth-like shape in which concavity and convexity are repeated. A light of the point light source can be efficiently uniformized in the light guide plate, and thus unevenness of brightness can be prevented.

Backlight device and display device

Provided is a backlight device which can reduce the size and weight of light-guiding members while also improving light use efficiency. The backlight device ( 10 ) is provided with a light-guiding plate ( 11 ) and a plurality of LEDs ( 12 ) which irradiate the light-guiding plate with light. The light-guiding plate includes a plurality of side surfaces ( 11 a ) and a plurality of light incident surfaces ( 11 b ) which are formed in a plurality of corners and are arranged opposite the LEDs. The side surfaces are arranged between adjacent light incident surfaces and are formed in convex shapes.

Surface Light Guide and Planar Emitter

A surface light guide has a radiation exit area extending along a main extension plane of the surface light guide and is provided for laterally coupling radiation. The surface light guide includes scattering locations for scattering the coupled radiation. The surface light guide includes a first boundary surface and a second boundary surface which delimit the light conductance of the coupled-in radiation in the vertical direction. A first layer and a second layer are formed on each other in the vertical direction between the first boundary surface and the second boundary surface. Further disclosed are a planar emitter including at least one surface light guide. 115-. (canceled)16. A surface light guide , comprising:a radiation exit area running along a main extension plane of the surface light guide and is provided for laterally coupling in radiation;scattering locations for scattering the coupled-in radiation;a first interface and a second interface, which delimit light guidance of the coupled-in radiation in a vertical direction; anda first layer and a second layer formed one on top of the other in the vertical direction between the first interface and the second interface.17. The surface light guide according to claim 16 , wherein the scattering locations have an average extent which is at most 1.0 times a peak wavelength of the coupled-in radiation in the surface light guide.18. The surface light guide according to claim 16 , wherein the surface light guide is provided for coupling in radiation having a first radiation component and a second radiation component.19. The surface light guide according to claim 18 , wherein the first layer and the second layer are formed in such a way that a ratio of the first radiation component to the second radiation component is homogeneous over the radiation exit area.20. The surface light guide according to claim 18 , wherein the first layer and the second layer are decoupled from one another with regard to the light guidance. ...

Front light devices and methods of fabrication thereof

A illumination device comprises a light guide having a first end for receiving light and configured to support propagation of light along the length of the light guide. A turning microstructure is disposed on a first side of the light guide configured to turn light incident on the first side and to direct the light out a second opposite side of the light guide, wherein the turning microstructure comprises a plurality of indentations. A cover is physically coupled to the light guide and disposed over the turning microstructure. An interlayer is between the cover and the light guide, wherein the interlayer physically couples the cover to the light guide. A plurality of open regions is between the interlayer and the plurality of indentations. Various embodiments include methods of coupling the cover to the light guide while preserving open regions between the cover and plurality of indentations.

LIGHT GUIDE PLATE AND SURFACE LIGHT SOURCE DEVICE

A light guide plate includes an incident surface on which light outputted from point light sources is incident and an outgoing surface for outputting light incident from the incident surface. A reflection-and-propagation surface for reflecting light toward the outgoing surface is formed in a back surface opposite to the outgoing surface. The outgoing surface is made up of a propagation region adjacent to the incident surface, a propagation auxiliary region adjacent to the propagation region, a first diffusion-and-propagation region adjacent to the propagation auxiliary region, and a second diffusion-and-propagation region adjacent to the first diffusion-and-propagation region. The propagation region, the propagation auxiliary region, and the first diffusion-and-propagation region control hot spots and bright/dark lines in vicinities of the incident surface, while the second diffusion-and-propagation region controls viewing-angle characteristics of the light guide plate. 1. A light guide plate comprising:an incident surface on which light outputted from a plurality of point light sources is incident;an outgoing surface from which light incident from the incident surface is outputted; anda reflection-and-propagation surface at which the light incident from the incident surface is reflected so as to propagate the light toward the outgoing surface, the reflection-and-propagation surface being opposed to the outgoing surface, whereina plurality of prism grooves extending parallel to the incident surface are formed in the reflection-and-propagation surface,a flat surface portion is formed in a region of the outgoing surface adjacent to the incident surface, anda plurality of prism protrusions extending orthogonal to the incident surface are formed in a prism portion provided in a region of the outgoing surface adjacent to the flat surface portion.2. A light guide plate comprising:an incident surface on which light outputted from a plurality of point light sources is ...

Edge type LED backlight unit

A LED backlight unit structure, especially a edge type LED backlight unit, which had a substrate and a one or plurality LED light source lay on the substrate, and a light guide plate 101, which directly couple with the one or plurality LED by using the insert molding technology. A light modulation structure thereon the light guide plate, where near the one or plurality LED light source. A LED backlight unit structure, also can apply light tube or reflecting structure on the light guide plate, and that also can combined with the above-mentioned structures.

Light guide plate having dual micro structures

A light guide plate includes a light incident surface, a light exit surface; and a bottom surface opposite the light exit surface. The light incident surface includes many first micro structures and many second micro structures. Each second micro structure cover some of the first micro structures.

Optical light guide coupler

An optical light guide coupler for coupling at least two light guides comprises an input face and an output face, wherein the optical light guide coupler is configured to receive light from a first light guide having a stepped output profile and is configured to transmit that light to a second light guide having a non-stepped profile. The input face of the light guide coupler is registered to the stepped output profile of the first light guide and the output face of the light guide coupler is at least one of rectilinear and curved.

SURFACE LIGHT SOURCE DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE

In a surface light source device, a light guide plate includes a light introduction part that traps the light emitted from a point light source and incident from a light incident surface, and a light guide plate body. The light introduction part includes an inclined surface inclined from a surface in a portion having a thickness larger than that of the light guide plate body toward an end of the surface of the light guide plate body. The light guide plate body includes a directivity conversion pattern located between an effective lighting region of the light guide plate body and the light introduction part. The directivity conversion pattern converts a directivity direction of the light from the light introduction part to the effective lighting region such that an angle formed by the directivity direction and a direction perpendicular to the light incident surface decreases when viewed from above. 1. A surface light source device comprising:a light source; anda light guide plate configured to introduce light emitted from the light source through a light incident surface to output the light to an outside through a light exit surface, whereinthe light source is provided at a position facing the light incident surface of the light guide plate,the light guide plate includes a light introduction part configured to trap the light that is emitted from the light source and incident through the light incident surface, and includes a light guide plate body that is provided so as to be continuously joined to the light introduction part, a thickness of the light guide plate body being smaller than a maximum thickness of the light introduction part, the trapped light being output to the outside through the light exit surface by a light exit part,the light introduction part includes an inclined surface in at least one of a surface on a light exit side of the light guide plate and an opposite surface thereof, the inclined surface being inclined from a surface in a portion having a ...

Light guide plate holder and light guide plate testing system using same

A light guide plate holder includes a base, a partitioning plate, and two clamping blocks. The base includes a bottom wall and two side walls extending from opposite ends of the bottom wall, the bottom wall and the two side walls cooperatively forming a receiving space. The partitioning plate is positioned on the bottom wall in the receiving space, the partitioning plate partitioning the receiving space into two sub-spaces. The clamping blocks are detachably received in the respective sub-spaces, and each of the clamping blocks is configured for cooperating with the partitioning plate to clamp a light guide plate therebetween. A light guide plate testing system using the light guide plate holder is also provided. The testing system is used for testing microstructures on a light incident surface of a light guide plate.

LIGHT GUIDE PLATE AND LIQUID CRYSTAL DISPLAY APPARATUS USING THE SAME

Light can be uniformly distributed in the bezel area by diffusing the light in the bezel area blocked by an upper case, or by providing an optical pattern for light concentration. Accordingly, the brightness of light is similar for all positions at the boundary between the bezel area and the display area, thereby solving the hot spot problem caused by a brightness difference depending on position. 1. A light guide plate , which allows light emitted from a light source to enter through an incident plane ,the light guide plate comprising:a pattern unit spaced a predetermined distance away from the incident plane and at least partially disposed in a first direction in parallel with the incident plane,wherein the light guide plate comprises a bezel area blocked by a bezel and a display area outside the bezel area,wherein the pattern unit is configured to diffuse light incident through the incident plane in the first direction in the bezel area, andwherein the bezel area comprises an emission area, which falls within the range of the directivity angle of the light source, and a shaded area, which is out of the range of the directivity angle of the light source, andwherein a part of the pattern unit is formed in the shaded area.2. The light guide plate of claim 1 ,wherein the pattern unit comprises a compensation pattern which crosses the shaded area so that the ends of the compensation pattern fall within the range of the directivity angle of the light source.3. The light guide plate of claim 2 ,wherein the compensation pattern is spaced away from the incident plane by a distance greater than about 0.3 mm and less than about 0.7 mm.4. The light guide plate of any one of or claim 2 ,wherein the pattern unit further comprises a diffusion pattern which is disposed in both the shaded area and the emission area and is in parallel with the incident plane.5. The light guide plate of claim 4 ,wherein the diffusion pattern is disposed to be more adjacent to the incident plane ...

Source conditioning for imaging directional backlights

Disclosed is an imaging directional backlight apparatus for providing large area uniform directed illumination from localized light sources. Within an exemplary optical valve system, a waveguide comprises a stepped structure, where the steps comprise extraction features hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays as well as improved 2D display functionality. Illumination uniformity is provided by the positioning, packaging, and optically modifying of individual input sources. The latter employs non-imaging and refractive optics.

Surface light source device

A surface light source device has a light source, and a light guide plate introducing light of the light source from a light incidence surface and emitting the light from a light exit surface to outside. The light source being is provided at a position facing the light incidence surface of the light guide plate. The light guide plate includes a light introducing part for enclosing the light from the light source entering from the light incidence surface and a light guide plate main body having a thickness smaller than a maximum thickness of the light introducing part, provided so as to be continued to the light introducing part, and emitting the enclosed light from the light exit surface by light emitting portion to outside.

PLANAR LIGHTING DEVICE

There is provided a planar lighting device which can emit light with high light use efficiency and small luminance unevenness. This object is achieved by having a light guide plate including two or more layers overlapping in a direction perpendicular to a light exit surface and having different particle concentrations of the scattering particles, thicknesses of the layers in the direction perpendicular to the light exit surface varying so that a combined particle concentration has, in a direction perpendicular to a light incidence surface, a first local maximum value closer to the light incidence surface and a second local maximum value located farther from the light incidence surface than the first local maximum value and being larger than the first local maximum value; and a micro-lens film having a plurality of spherical micro-ball lenses formed on a film. 1. A planar lighting device comprising:a light guide plate that includes a rectangular light exit surface, one or more light incidence surfaces which are each disposed on an end side of the light exit surface and through which light traveling in a direction substantially parallel to the light exit surface enters, a rear surface on an opposite side to the light exit surface, scattering particles dispersed in the light guide plate, and two or more layers overlapping in a direction substantially perpendicular to the light exit surface and having different particle concentrations of the scattering particles, thicknesses of the two or more layers in the direction substantially perpendicular to the light exit surface varying so that a combined particle concentration of the light guide plate has, in a direction perpendicular to the one light incidence surface, a first local maximum value on a side closer to one of the one light incidence surface and a second local maximum value located at a position more distant from the one light incidence surface than the position of the first local maximum value and being larger ...

OPTICAL ELEMENT, ILLUMINATION DEVICE, AND PROJECTION DISPLAY DEVICE

An optical element that is capable of reventing an increase in size while increasing the light intensity of fluorescent light includes: a light-guide plate () that propagates light incident from a light source (); a phosphor layer () that is provided on the light-guide plate () and that generates fluorescent light by means of light from the light-guide plate (); a metal layer () that is layered on the phosphor layer (); and a diffraction grating that is formed at the interface of the phosphor layer () and the metal layer (). 1. An optical element comprising:a light-guide plate that propagates light that is incident from a light source;a phosphor layer that is provided on said light-guide plate and that generates fluorescent light by means of the light from said light-guide plate; anda metal layer that is layered on said phosphor layer;wherein a diffraction grating is formed on the interface of said light-guide plate and said phosphor layer.2. The optical element as set forth in claim 1 , further comprising a wavelength-selective part that is provided on the surface of said light-guide plate that is opposite the surface on which said phosphor layer is provided claim 1 , that reflects light that is incident from said light source claim 1 , and that transmits and emits fluorescent light generated from said phosphor layer.3. The optical element as set forth in claim 2 , further comprising a structure that is provided on said wavelength-selective part and that suppresses reflection of said fluorescent light.413. The optical element as set forth in claim claim 2 , wherein said diffraction grating is an uneven structure formed on said light-guide plate.5. The optical element as set forth in claim 1 , wherein said phosphor layer includes metal fine-particles in which surface plasmons are excited by light from said light-guide plate.6. The optical element as set forth in claim 1 , wherein the effective dielectric constant on the light guide body-side of said metal layer is ...

DISPLAY DEVICE

A display device includes a side light type backlight for white color display by single color LEDs, an LED set is placed in a concave portion of a light guide plate, in which a first color LED is located in the center and a second or third color LED is located on the side of the first color LED. An incident slit with an arc shaped convex portion is formed facing the first color LED, and a saw tooth slit with a right-angled triangular concave portion is formed facing the second or third color LED. This allows directing the distribution axes of the lights from the second and third color LEDs to the center side, and adjusting orientation angles to allow effective mixing of the three color lights, in order to increase the white color area and effective display area. 1. A display device comprising a display panel including a TFT substrate and a counter substrate with a backlight provided in a back of the display panel ,wherein the backlight is a side-light type including a light guide plate and a light source which is mounted on a side of the light guide plate,wherein the light source is an LED set in which a first color LED is located in the center, a second color LED is located on one side of the first color LED, and a third color LED is located on the other side of the first color LED,wherein a concave portion is formed to place the LED set in the light guide plate,wherein incident slits with symmetrical shapes are formed in the concave portion of the light guide plate at a position facing the first color LED, andwherein saw tooth slits with asymmetrical shapes are formed in the concave portion of the light guide plate at a position facing the second color LED and the third color LED.2. The display device according to claim 1 ,wherein the incident slits formed facing the first color LED have arc shaped convex portions,wherein the saw tooth slits facing the second color LED and the third color LED have triangular concave portions, andwherein each of the triangular ...

Light-trapping sheet and rod, and light-receiving device and light-emitting device using the same

A light-trapping sheet includes: a light-transmitting sheet having first and second principal surfaces; and a plurality of light-coupling structures arranged in an inner portion of the light-transmitting sheet, wherein: each of the plurality of light-coupling structures includes a first light-transmitting layer, a second light-transmitting layer, and a third light-transmitting layer sandwiched therebetween; a refractive index of the first and second light-transmitting layers is smaller than a refractive index of the light-transmitting sheet; a refractive index of the third light-transmitting layer is larger than the refractive index of the first and second light-transmitting layers; and the third light-transmitting layer has a two-dimensional diffraction grating parallel to the first and second principal surfaces of the light-transmitting sheet.

LIGHT GUIDE PLATE, PLANAR LIGHTING DEVICE AND METHOD OF MANUFACTURING LIGHT GUIDE PLATE

A light guide plate is provided which is high in light use efficiency, and is capable of emitting light with reduced luminance unevenness and obtaining a convex distribution. The light guide plate includes two or more layers which change in thickness in a direction substantially perpendicular to a light exit surface. A combined particle concentration changes so as to have a first local maximum value on a side closer to each of one or more light incidence surfaces and a second local maximum value which is larger than the first local maximum value. Each of the one or more light incidence surfaces is a roughened surface obtained by forming a cut and polished surface having a given periodic structure in a direction parallel to a longitudinal direction of each of the one or more light incidence surfaces. 1. A light guide plate comprising:a rectangular light exit surface;one or more light incidence surfaces which are provided on one or more end sides of said light exit surface and through which light traveling in a direction substantially parallel to said light exit surface enters;a rear surface on an opposite side to said light exit surface; andscattering particles dispersed in said light guide plate;wherein said light guide plate includes two or more layers superposed on each other in a direction substantially perpendicular to said light exit surface and containing said scattering particles at different particle concentrations,wherein thicknesses of said two or more layers in the direction substantially perpendicular to said light exit surface change so that a combined particle concentration has, in a direction perpendicular to each of said one or more light incidence surfaces, a first local maximum value located on a side closer to each of said one or more light incidence surfaces and a second local maximum value located at a position farther from said one or more light incidence surfaces than one or more positions of said first local maximum value and being larger ...

METHODS OF MAKING A GLASS ARTICLE WITH A STRUCTURED SURFACE

A method of making a glass article, for example a glass light guide plate comprising at least one structured surface including a plurality of channels and peaks. The glass article may be suitable for enabling one dimensional dimming when used in a backlight unit for use as an illuminator for liquid crystal display devices. 1. A method of making a glass article , comprisingdepositing an etch mask on a first major surface of a glass sheet, the etch mask forming a plurality of parallel rows on the first major surface;exposing the glass sheet to an etchant, thereby removing glass from the first major surface of the glass sheet between the plurality of parallel rows, the removing glass forming a plurality of channels in the first major surface of the glass sheet; andremoving the etch mask, the resultant glass article comprising a glass sheet with a plurality of channels formed in the first major surface, at least one channel of the plurality of channels comprising a depth H in a range from about 5 μm to about 300 μm, a width S defined at H/2, and wherein a ratio S/H is in a range from about 1 to about 15.2. The method according to claim 1 , further comprising depositing an adhesion layer on the first major surface prior to depositing the etch mask.3. The method according to claim 2 , wherein the adhesion layer comprises a silane layer or a siloxane layer.46-. (canceled)7. The method according to claim 1 , wherein the etch mask is applied by a screen printing process.8. The method according to claim 7 , wherein the screen printing process comprises a cured emulsion pattern on a surface of a woven screen claim 7 , and a string angle of the woven screen relative to the cured emulsion pattern is in a range from about 20° to about 45°.9. The method according to claim 8 , wherein the woven screen comprises stainless steel wires.10. The method according to claim 1 , wherein the etchant comprises HF.11. The method according to claim 10 , wherein the etchant further comprises HNO ...

SYSTEM FOR WAVEGUIDE PROJECTOR WITH WIDE FIELD OF VIEW

A waveguide display includes a first diffractive input waveguide operable to receive input data from a first projector and diffract image data associated with the first projector at a first angular offset and a second diffractive input waveguide operable to receive input data from a second projector and diffract image data associated with the second projector at a second angular offset. The waveguide display also includes a diffractive output waveguide optically coupled to the first diffractive input waveguide and the second diffractive input waveguide. The diffractive output waveguide receives the image data associated with the first projector and image data associated with the second projector and is operable to direct image data associated with the first projector toward a first field of view and direct image data associated with the second projector toward a second field of view. 1. A waveguide display comprising:a first diffractive input waveguide operable to receive input data from a first projector and diffract image data associated with the first projector at a first angular offset;a second diffractive input waveguide operable to receive input data from a second projector and diffract image data associated with the second projector at a second angular offset; and direct image data associated with the first projector toward a first field of view; and', 'direct image data associated with the second projector toward a second field of view., 'a diffractive output waveguide optically coupled to the first diffractive input waveguide and the second diffractive input waveguide, wherein the diffractive output waveguide receives the image data associated with the first projector and image data associated with the second projector and is operable to2. The waveguide display of wherein an absolute value of the first angular offset and an absolute value of the second angular offset are equal.3. The waveguide display of wherein:the diffractive output waveguide has a ...

ELECTRONIC DEVICE

An electronic device is disclosed. The electronic device according to the present disclosure includes: a display which includes a display area opposite to eyeball of a user and a dummy area which is a remaining area, a plurality of optical elements disposed to be dispersed on one surface of the display, and a guide element which guides light emitted from the optical elements to the display area. An electronic device according to the present invention may be associated with an artificial intelligence module, robot, augmented reality (AR) device, virtual reality (VR) device, and device related to 5G services. 1. An electronic device , comprising:a display which includes a display area opposite to eyeball of a user and a dummy area which is a remaining area;a plurality of optical elements disposed to be dispersed on one surface of the display; anda guide element which guides light emitted from the optical elements to the display area.2. The electronic device according to claim 1 , wherein the optical element includes a micro LED.3. The electronic device according to claim 2 , wherein the optical element emits light from one surface of the display to a direction opposite to the eyeball of the user and the guide element guides the light emitted from the optical element toward the eyeball of the user in the display area.4. The electronic device according to claim 3 , wherein the guide element includes a diffraction element which diffracts the light emitted from the optical element to be guided to the display area.5. The electronic device according to claim 4 , wherein the guide element further includes a reflection element which reflects the light emitted from the optical element to be guided to the display area.6. The electronic device according to claim 5 , wherein the diffraction element is disposed on entire one surface of the display and the display area of the other surface of the display.7. The electronic device according to claim 6 , wherein the optical element is ...

BEVELED LIGHT GUIDE PLATE

A display couples a display panel over a light guide plate in a sharp edge housing by adapting the light guide plate side to have a beveled surface that fits along its perimeter into a reduced depth of the housing. The light guide plate beveled surface has angled sides relative to the light guide plate illumination side and reflective side to fit against parallel sides formed in the housing as the housing narrows towards its base where the light guide plate couples. A diffusive pattern formed in the light guide plate reflective surface that directs light towards the illumination surface extends onto the light guide plate side beveled surface. 1. An information handling system comprising:a processor operable to execute instructions to process information;a memory interfaced with the processor and operable to store the instructions and information;a graphics processor operable to process the information to define visual images for presentation;a display panel interfaced with the graphics processor and operable to generate the visual image at a front surface;a backlight disposed at a rear surface of the display panel to provide illumination to the display panel, the backlight having a light guide plate, the light guide plate having an illumination side proximate the display panel to provide illumination to the display panel, a reflective side distal the display panel providing reflected light towards the illumination side, and a perimeter having at least one beveled side extending from the illumination side inward towards the reflective side; anda display housing having a base with a first perimeter and support arm extending up from the base to define a beveled exterior terminating at a sharp edge exterior defining a second perimeter of greater than the first perimeter, the sharp edge defining an interior area to support the display panel, the backlight perimeter beveled side disposed in the housing below the display panel at the display housing support arm to provide ...

Display device, in particular a head-mounted display, based on temporal and spatial multiplexing of hologram tiles

The invention relates to a display device, in particular a head-mounted display or hocular, having a spatial light modulator and a controllable light-deflecting device for generating a multiple image of the spatial light modulator, which consists of segments, the multiple image being produced at least with a predefinable number of segments which determines the size of a visible area within which a 3D-scene holographically encoded in the spatial light modulator can be reconstructed for observation by an eye of an observer.

OPTICAL SENSING UNIT AND TOUCH PANEL DEVICE INCLUDING THE SAME

Provided is an optical sensing member, comprising a light guide plate which propagates light from a light source unit , detecting units which detect scattered light from the light guide plate being touched, an optical member which guides the scattered light to the detecting units, and a primary control unit which computes the touch location upon the light guide plate on the basis of information relating to the detected light. The optical member has arc-shaped curved surfaces formed on the end parts which face each of the detecting units. Each of the detecting units outputs, as the information relating to the light which is detected by the detecting units, location information corresponding to the angle of entry to the detecting units of the light which is radiated from the facing arc-shaped curved surfaces. It is thus possible to clarify contours of the light which is detected by the detecting units, and to improve the precision of the detection of the touch location. 116-. (canceled)17: An optical sensing unit comprising:a detecting member for detecting light; anda flat optical member for guiding to the detecting member scattered light or incoming light, the scattered light occurring from light transmitted inside a flat light guide unit, and the scattered light starting being transmitted inside the light guide unit and propagating through the light guide unit when a first input object touches a surface of the light guide unit where the light is transmitted therein; and the incoming light occurring when a second input object touches the surface of the light guide unit and emits light, and coming into the light guide unit, whereinthe optical member has an arc-shaped curved surface in a section and the arc-shaped curved surface faces the detecting member,the detecting member outputs, as information relating to the light which is detected by the detecting member, location information of the first or second input object corresponding to an incident angle on the ...

EXIT PUPIL EXPANDING DIFFRACTIVE OPTICAL WAVEGUIDING DEVICE

An optical device is disclosed for expanding input light in two dimensions in an augmented reality display. The device comprises a waveguide () and three linear diffraction grat-ings H H H An incident beam from a projector illuminates an input grating H with polychromatic light, and the light is coupled into the waveguide (). The other two gratings H H are overlaid on top of one another. Light can be diffracted by one grating H into a first diffracted order and towards the other grating H which can couple the light out of the waveguide () towards a viewer. In another arrangement the crossed gratings H H may be replaced by a photonic crystal () having a regular array of pillars () which create a number effective diffraction gratings. 1. An optical device for expanding input light in two dimensions in an augmented reality display , comprising:a waveguide;an input diffractive optical element configured to couple input light into the waveguide; andtwo diffractive optical elements entirely overlaid on one another in or on the waveguide, wherein each of the two diffractive optical elements is configured to receive light from the input diffractive optical element and couple it towards the other diffractive optical element which can then act as an output diffractive optical element providing outcoupled orders towards a viewer.2. The optical device of wherein each diffractive optical element comprises grooves and a grating vector in the plane of the grooves claim 1 , having a direction that is normal to the grooves and a magnitude which is inversely related to the pitch of the grooves claim 1 , wherein the input and output diffractive optical elements respectively have grating vectors with a substantially equal magnitude.3. The optical device of wherein a combination of the respective grating vectors of the input diffractive optical element and the two diffractive optical elements is a resultant vector with substantially zero magnitude.4. The optical device of wherein the ...

OPTICAL MIXER AND MULTI-WAVELENGTH HOMOGENEOUS LIGHT SOURCE USING THE SAME

An optical mixer efficiently homogenizes light flux emitted from a plurality of light sources emitting light having different wavelengths to provide a multi-wavelength homogeneous light source. The optical mixer has a columnar shape made of a transparent material, a length of the side surfaces is larger than an outermost diameter of a top surface or a bottom surface of the columnar shape, and a large number of scattering particles scattering light contained inside the optical mixer. The side surface of the optical mixer reflects light, and the top surface and the bottom surface thereof transmit light. Thereby, a function of mixing light incident from the top or bottom surface by the reflecting function of the side surface and the scattering function of the scattering particles is provided. 1. An optical mixer for mixing light ,wherein the optical mixer hasa columnar shape made of a transparent material,and contains a large number of scattering particles having a function of scattering light inside,wherein a side surface of the optical mixer has a function of reflecting light,wherein a top surface and a bottom surface of the optical mixer have a function of transmitting light,wherein a length of the side surface of the optical mixer is larger than an outermost diameter of the top surface or the bottom surface,wherein light incident from the top surface or the bottom surface is mixed by the reflecting function of the side surface and the scattering function of the scattering particles, and mixed light is emitted from the top surface or the bottom surface.2. The optical mixer according to claim 1 , wherein a shape of the top surface or the bottom surface of the optical mixer is formed as a substantially regular triangular prism claim 1 , a quadrangle claim 1 , or a substantially regular hexagonal prism.3. The optical mixer according to claim 2 , wherein a density of the scattering particles provided inside the optical mixer is set to be different along the side surface ...

OPTICAL COMPONENT HAVING VARIABLE DEPTH GRATINGS AND METHOD OF FORMATION

An optical grating component may include a substrate, and an optical grating, the optical grating being disposed on the substrate. The optical grating may include a plurality of angled structures, disposed at a non-zero angle of inclination with respect to a perpendicular to a plane of the substrate, wherein the plurality of angled structures are arranged to define a variable depth along a first direction, the first direction being parallel to the plane of the substrate. 2. The optical grating of claim 1 , wherein the plurality of angled structures extend along a second direction claim 1 , perpendicular to the first direction claim 1 , and wherein a grating height of an angled structure along the second direction is uniform.3. The optical grating component of claim 2 ,wherein the optical grating is a first optical grating,the optical grating component further comprising a second optical grating, the second optical grating comprising a second plurality of angled structures, disposed at a second non-zero angle of inclination with respect to the perpendicular to the plane of the substrate, wherein the second plurality of angled structures are arranged to define a second variable depth along the second direction.4. The optical grating component of claim 1 , wherein the optical grating comprises silicon oxide claim 1 , silicon nitride claim 1 , or a glass.5. The optical grating component of claim 1 , wherein the optical grating comprises a grating height in a range of 100 nm to 1000 nm claim 1 , wherein the optical grating comprises a grating height variation of 10%-40%.6. The optical grating component of claim 1 , wherein the optical grating is disposed in a grating layer claim 1 , the optical grating component further comprising an etch stop layer claim 1 , disposed between the substrate and the grating layer.7. The optical grating component of claim 6 , wherein the etch stop layer comprises a thickness of 10 nm to 100 nm.8. The optical grating component of claim 6 , ...

Liquid crystal display device

A liquid crystal display device including: a liquid crystal panel 2; a diffuser 3 provided behind the liquid crystal panel 2; a light guide member 4 provided behind the diffuser 3; and a case supporting the liquid crystal panel 2, the diffuser 3, and the light guide member 4, where the case includes an opening at the back, the light guide member 4 is provided covering the opening, and the light guide member 4 includes a first prism 7 including an incident surface 8 on which outside light from above is incident, and a first slope surface 9 provided below the incident surface 8, and reflecting light incident from the incident surface 8 and on which outside light from behind is incident, the liquid crystal display device being able to make use of outside light efficiently.

ILLUMINATION DEVICE, DISPLAY APPARATUS, AND TIMEPIECE

There is provided an illumination device including: a light guide plate in which a light diffusion pattern of diffusing incident light is formed to have density that is coarse on one side and gets denser toward the other side; a first light source which is provided on a side corresponding to the one side of the light diffusion pattern in the light guide plate; and a second light source which is provided on a side corresponding to the other side of the light diffusion pattern in the light guide plate. 1. An illumination device comprising:a light guide plate in which a light diffusion pattern of diffusing incident light is formed to have density that is coarse on one side and gets denser toward the other side;a first light source configured to be provided on a side corresponding to the one side of the light diffusion pattern in the light guide plate; anda second light source configured to be provided on a side corresponding to the other side of the light diffusion pattern in the light guide plate.2. The illumination device according to claim 1 , further comprising:a first incident unit configured to be provided on the one side of the light guide plate and take in light from the first light source to the light guide plate along a surface direction of the plate; anda second incident unit configured to be provided on the other side of the light guide plate and take in light from the second light source to the light guide plate along a surface direction of the plate.3. The illumination device according to claim 1 , further comprising:a first incident unit configured to be provided on the one side of the light guide plate and take in light from the first light source to the light guide plate along a surface direction of the plate; anda second incident unit configured to be provided on the other side of the light guide plate and take in light emitted from the second light source to the light guide plate from a direction orthogonal to a surface direction of the plate.4. The ...

DIFFRACTIVE LIGHT GUIDE PLATE AND DISPLAY DEVICE INCLUDING SAME

A diffractive light guide plate including a light guide unit; an input diffractive optical element that receives lights output from a light source and diffracts the received lights to be guided on the light guide unit; and two output diffractive optical elements disposed in a predetermined region of the light guide unit and having different linear grating patterns from each other, wherein the two output diffractive optical elements are configured so that each one output diffractive optical element receives the lights from the input diffractive optical element and allows the received lights to be directed to the other output diffractive optical element by diffraction, and so that each one output diffractive optical element receives lights from the other output diffractive optical element and allows the received lights to be output from the light guide unit by diffraction, and the two output diffractive optical elements having different linear grating patterns are alternately arranged in at least one dimension in a central region having at least a predetermined width within the predetermined region and partitioned longitudinally from a side adjacent to the input diffractive optical element to an opposite side thereto. 1. A diffractive light guide plate comprising:a light guide unit configured to guide lights;an input diffractive optical element configured to receive lights output from a light source and diffract the received lights to be guided on the light guide unit; andtwo output diffractive optical elements disposed in a predetermined region of the light guide unit and having different linear grating patterns from each other,wherein the two output diffractive optical elements are configured so that each one output diffractive optical element receives the lights from the input diffractive optical element and allows the received lights to be directed to the other output diffractive optical element by diffraction,wherein the two output diffractive optical elements ...

DISTRIBUTED LIGHT MANIPULATION OVER IMAGING WAVEGUIDE

In a stacked waveguide assembly, the waveguides can comprise color filters, distributed filters, and/or switch materials. Examples of color filters include dyes, tints, or stains. Examples of distributed filters and/or switch materials include dichroic filters, Bragg gratings, electronically switchable glass, and electronically switchable mirrors. Switch materials can be designed or tuned to attenuate light of unwanted colors or wavelengths. The waveguides may each be associated with a particular design wavelength. This can mean that a waveguide that is associated with a design wavelength includes an incoupling optical element is configured to deflect light at the design wavelength to an associated light distributing element and that the associated wavelength selective region is configured to attenuate light not at the design wavelength. 1. A waveguide comprising:an incoupling optical element configured to couple light into the waveguide, the light comprising a first wavelength and a second wavelength not equal to the first wavelength;a light distributing element configured to receive light from the incoupling optical element and to propagate light via total internal reflection, the light distributing element comprising a wavelength selective region configured to attenuate incoupled light at the second wavelength relative to incoupled light at the first wavelength; andan outcoupling optical element configured to receive light from the light distributing element and to couple light at the first wavelength out of the waveguide.2. The waveguide of claim 1 , wherein the incoupling optical element comprises a grating.3. The waveguide of claim 1 , wherein the wavelength selective region comprises a dye claim 1 , a tint claim 1 , a stain claim 1 , a dichroic filter claim 1 , or a Bragg grating.4. The waveguide of claim 1 , wherein the incoupling optical element does not comprise a wavelength selective filter.5. The waveguide of claim 1 , wherein the outcoupling optical ...

DISPLAY SYSTEM WITH OPTICAL ELEMENTS FOR IN-COUPLING MULTIPLEXED LIGHT STREAMS

Architectures are provided for selectively incoupling one or more streams of light from a multiplexed light stream into a waveguide. The multiplexed light stream can have light with different characteristics (e.g., different wavelengths and/or different polarizations). The waveguide can comprise in-coupling elements that can selectively couple one or more streams of light from the multiplexed light stream into the waveguide while transmitting one or more other streams of light from the multiplexed light stream. 1. A display system comprising:a waveguide; andan image injection device configured to direct a multiplexed light stream into the waveguide, the multiplexed light stream comprising a plurality of light streams having different light properties,wherein the waveguide comprises in-coupling optical elements configured to selectively in-couple a first of the streams of light while being transmissive to one or more other streams of light.2. The system of claim 1 , wherein the waveguide is part of a stack of waveguides claim 1 , wherein the stack of waveguides includes a second waveguide comprising in-coupling optical elements configured to selectively turn a second of the streams of light while being transmissive to one or more other streams of light claim 1 , wherein the in-coupling optical elements of the waveguide are configured to transmit at least one of the streams of light to the in-coupling optical elements of the second waveguide.3. The system of claim 1 , wherein the in-coupling optical elements are diffractive structures.4. The system of claim 1 , wherein the in-coupling optical elements comprise liquid crystal material.5. The system of claim 1 , wherein the in-coupling optical elements are switchable between transmissive and actively light redirecting states.6. The system of claim 1 , wherein the in-coupling optical elements comprise meta-surfaces.7. The system of claim 1 , wherein the in-coupling optical elements comprise metamaterials.8. The system of ...

ENVIRONMENTALLY ISOLATED WAVEGUIDE DISPLAY

A waveguide display having an input image generator providing image light projected over a field of view; a waveguide having first and second external surfaces; and at least one grating optically coupled to the waveguide for extracting light towards a viewer. The waveguide has a lateral refractive index variation between said external surfaces that prevents any ray propagated within the waveguide from optically interacting with at least one of the external surfaces. 1. A waveguide display , comprising:an input image generator providing image light projected over a field of view;a waveguide having first and second external surfaces; andat least one grating optically coupled to said waveguide for extracting light from said waveguide towards a viewer of said display,wherein said waveguide has a lateral refractive index variation between said external surfaces that prevents rays propagating within said waveguide from optically interacting with at least one of said external surfaces.2. The apparatus of wherein said waveguide contains a GRIN medium wherein said grating is disposed in proximity to one of said external surfaces.3. The apparatus of claim wherein said waveguide contains a GRIN medium claim 1 , wherein said grating is disposed within said GRIN medium.4. The apparatus of wherein said waveguide contains a GRIN medium claim 1 , wherein said grating is a surface relief structure formed on one of said external surfaces.5. The apparatus of wherein said waveguide comprises a first waveguide portion containing a GRIN medium abutting a second waveguide portion operating in TIR and containing at least one grating for extracting light from said second waveguide portion towards a viewer of said display.6. The apparatus of wherein said waveguide further comprises an input grating.7. The apparatus of immersed in air.8. The apparatus of providing one of a HUD claim 1 , HMD or a light field display.9. The apparatus of wherein said waveguide is curved.10. The apparatus of ...

OPTICAL MEMBER, LIGHT GUIDING MEMBER, AND METHOD FOR PRODUCING OPTICAL MEMBER

The purpose of the present invention is to provide an optical member and the like which enable suppression of diffusion of stray light due to a pigment even when the optical member and the like are used adjacent to a light guiding part through which incident light is transmitted. The optical member is configured to be used adjacent to the light guiding part through which the incident light is transmitted and to attenuate the incident light. The optical member has a dispersed carbon particle part that is formed as a result of dispersion of carbon particles in a particular region in a silicone resin. The carbon particles are stray light diffusion suppressing particles for suppressing the intensity of light being incident onto the carbon particles and diffused. 1. An optical member used adjacent to a light guide unit adapted to transmit incident light , the optical member being configured to attenuate the incident light , the optical member comprising:a carbon particle-dispersed unit in which carbon particles are dispersed in a specific region of a silicone resin,the carbon particles being stray light scattering suppressing particles that reduce an intensity of light incident onto the carbon particles and scattered by the carbon particles, andthe carbon particles in the carbon particle-dispersed unit include carbon black particles having a minor axis between 0.5 μm, inclusive, and 2.0 μm, inclusive.2. The optical member according to claim 1 , wherein a concentration of the carbon black particles in the carbon particle-dispersed unit is between 5 wt % claim 1 , inclusive claim 1 , and 20 wt % claim 1 , inclusive.3. The optical member according to claim 1 , wherein the carbon particles in the carbon particle-dispersed unit include a carbon nanotube.4. The optical member according to claim 2 , wherein the specific region is a region corresponding to a region extending to a depth of an absorption length of specific light from a boundary between the light guide unit and the ...

LIGHT GUIDE PLATE, MANUFACTURING METHOD THEREOF, BACKLIGHT SOURCE AND DISPLAY DEVICE

The present disclosure provides a light guide plate, a manufacturing method thereof, a backlight source and a display device. The light guide plate includes: a first surface, a second surface, and at least one blazed gating structure that is on the second surface of the light guide plate, wherein light incident from the first surface of the light guide plate forms a total reflection in the light guide plate after the light irradiates the at least one blazed gating structure and is diffracted by the at least one blazed grating structure. 1. A light guide plate , comprising:a first surface;a second surface; andat least one blazed grating structure on the second surface,wherein the at least one blazed grating structure is configured to diffract light incident from the first surface, wherein the light forms a total reflection in the light guide plate after the light irradiates the at least one blazed grating structure.2. The light guide plate according to claim 1 , wherein the second surface of the light guide plate has a rectangular shape claim 1 , the at least one blazed grating structure comprises at least one first blazed grating structure claim 1 , the at least one first blazed grating structure is proximal to a first edge of the second surface.3. The light guide plate according to claim 2 , wherein one of the at least one first blazed grating structure along the first edge has a length that is substantially equal to a length of the first edge.4. The light guide plate according to claim 2 , wherein the at least one blazed grating structure comprises multiple first blazed gating structures alone the first edge of the second surface claim 2 , and adjacent first blazed gating structures are separated by a distance.5. The light guide plate according to claim 2 , wherein the at least one blazed grating structure further comprises at least one second blazed grating structure proximal to a third edge of the second surface claim 2 , the third edge is an edge parallel to ...

OPTICAL SYSTEM FOR LIGHTING EQUIPMENT, ESPECIALLY FOR A SIGNAL LAMP FOR MOTOR VEHICLES

An optical system for a lighting device, comprising a light-guiding optical part configured for spreading light beams generated by light sources situated opposite to a rear side of the optical part. Light beams are coupled into the light-guiding optical part, and after passing through the light-guiding optical part the light beams are emitted through its output surface. Rear side of light-guiding optical part is equipped with macroscopic cavities, each pair of adjacent macroscopic cavities forming between themselves an optical segment, whose two sides, which separate the optical segment from the pair of macroscopic cavities, comprise a reflective surface. The optical segment comprises a rear surface on the rear side, opposite to which a light source is positioned. The reflective surfaces are configured for reflecting a part of the light beams, which were coupled through the rear surface into the optical segment, and then directing them to the output surface. 1. An optical system for a lighting device comprising a light-guiding optical part configured for spreading light beams generated by light sources situated opposite to a rear side of the optical part , through which rear side light beams are coupled into the light-guiding optical part , and after passing through the light-guiding optical part the light beams are emitted through its output surface , wherein the rear side of the light-guiding optical part is equipped with macroscopic cavities , each pair of adjacent macroscopic cavities forming between themselves an optical segment , whose two sides , which separate the optical segment from the said pair of macroscopic cavities , include a reflective surface , wherein the optical segment comprises a rear surface on the rear side , opposite to which rear surface a light source is positioned , wherein the reflective surfaces are configured for reflecting a part of the light beams , which were coupled through the rear surface into the optical segment , and directing ...

METHOD TO REDUCE DIFFRACTION ARTIFACTS IN A WAVEGUIDE DISPLAY AND DISPLAY USING THE SAME

An optical device with reduced see-through diffraction artifacts for Augmented Reality (AR) applications is provided. The device includes a projector configured to generate an image light and a waveguide optically coupled with the projector and configured to guide the image light to an eye-box. The waveguide includes an in-coupling element configured to couple the image light into the waveguide, and an out-coupling element configured to decouple the image light out of the waveguide. The waveguide includes at least one switchable grating configured to: during a virtual-world subframe of a display frame, decouple the image light out of the waveguide via diffraction, and during a real-world subframe of the display frame, transmit a light from a real-world environment to the eye-box with a diffraction efficiency less than a predetermined threshold. 1. An optical device , comprising:a projector configured to generate an image light; and an in-coupling element configured to couple the image light into the waveguide, and', 'an out-coupling element configured to decouple the image light out of the waveguide,, 'a waveguide optically coupled with the projector and configured to guide the image light to an eye-box, the waveguide comprising during a virtual-world subframe of a display frame, decouple the image light out of the waveguide via diffraction, and', 'during a real-world subframe of the display frame, transmit a light from a real-world environment to the eye-box with a diffraction efficiency less than a predetermined threshold., 'wherein the waveguide includes at least one switchable grating configured to2. The optical device according to claim 1 , wherein the predetermined threshold is about 0.1%.3. The optical device according to claim 1 , wherein: during the virtual-world subframe of the display frame, perform at least one of directing, expanding or decoupling the image light out of the waveguide via the diffraction, and', 'during the real-world subframe of the ...

OPTICAL ELEMENT, LIGHT GUIDE ELEMENT, AND IMAGE DISPLAY DEVICE

Provided are an optical element that can make the brightness of light emitted from a light guide plate uniform, a light guide element, and an image display device. The optical element includes a patterned cholesteric liquid crystal layer that is obtained by immobilizing a cholesteric liquid crystalline phase, in which the patterned cholesteric liquid crystal layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, and the patterned cholesteric liquid crystal layer has regions having different pitches of helical structures in a plane. 1. An optical element comprising a patterned cholesteric liquid crystal layer that is obtained by immobilizing a cholesteric liquid crystalline phase ,wherein the patterned cholesteric liquid crystal layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, andthe patterned cholesteric liquid crystal layer has regions having different pitches of helical structures in a plane.2. The optical element according to claim 1 ,wherein in the patterned cholesteric liquid crystal layer, a pitch of a helical structure increases from one side toward another side in the in-plane direction.3. The optical element according to claim 1 , comprising:a plurality of cholesteric liquid crystal layers,wherein the cholesteric liquid crystal layers have different twisted directions of helical structures, andat least one of the cholesteric liquid crystal layers is the patterned cholesteric liquid crystal layer.4. The optical element according to claim 3 , comprising:the patterned cholesteric liquid crystal layers having different twisted directions of helical structures,wherein in the patterned cholesteric liquid crystal layers having different twisted directions of helical structures, ...

COMPACT OPTICAL SYSTEM WITH MEMS SCANNERS FOR IMAGE GENERATION AND OBJECT TRACKING

An optical system that deploys micro electro mechanical system (MEMS) scanners to contemporaneously generate CG images and to scan a terrain of a real-world environment. An illumination engine emits a first spectral bandwidth and a second spectral bandwidth into an optical assembly along a common optical path. The optical assembly then separates the spectral bandwidth by directing the first spectral bandwidth onto an image-generation optical path and the second spectral bandwidth onto a terrain-mapping optical path. The optical system deploys the MEMS scanners to generate CG images by directing the first spectral bandwidth within the image-generation optical path and also to irradiate a terrain by directing the second spectral bandwidth within the terrain-mapping optical path. Accordingly, the disclosed system provides substantial reductions in both weight and cost for systems such as, for example, augmented reality and virtual reality systems. 1. An optical system , comprising:at least one controller for modulating output signals corresponding to image data defining computer-generated (CG) images, the at least one controller configured for processing tracking data associated with a terrain-mapping protocol for identifying features of a terrain of a real-world environment surrounding the optical system;an illumination engine to generate electromagnetic (EM) radiation in response to the output signals, wherein the EM radiation includes a first spectral bandwidth for generating the CG images and a second spectral bandwidth for deploying the terrain-mapping protocol;an optical assembly for receiving the EM radiation from the illumination engine and to cause the first spectral bandwidth and the second spectral bandwidth to propagate along a common optical path, wherein the optical assembly directs the first spectral bandwidth from the common optical path onto an image-generation optical path to generate the CG images, and wherein the optical assembly directs the second ...

IMAGE DISPLAY DEVICE

An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided. 1. An image display device comprising:an image forming device that includes a plurality of pixels arrayed in a two-dimensional matrix manner;a collimating optical system that converts light emitted from the pixels of the image forming device into parallel light; andan optical device that includes a light guide plate, a first diffraction grating member including a volume hologram diffraction grating for diffracting and reflecting light input to the light guide plate, which is disposed on the light guide plate, and a second diffraction grating member including a volume hologram diffraction grating for diffracting and reflecting light propagated within the light guide plate by total reflection, which is disposed on the light guide plate,wherein when assuming that the center of the first diffraction grating member is the origin, a normal of the first diffraction grating member passing through the origin with the direction toward the collimating optical system side as the positive direction is an Xi axis, and the axis line of the light guide plate with the direction passing through the origin, orthogonal to the Xi axis, toward the second diffraction grating member side as the positive direction is a Yi axis, the Yi axis is optically orthogonal to an interference pattern formed in ...

MULTI-ZONE BACKLIGHT, MULTIVIEW DISPLAY, AND METHOD

A multi-zone backlight and multi-zone multiview display with multiple zones selectively provide broad-angle emitted light corresponding to a two-dimensional (2D) image and directional emitted light corresponding to a multiview image to each zone of the multiple zones. The multi-zone backlight includes broad-angle backlight to provide the broad-angle emitted light and a multiview backlight to provide the directional emitted light. Each of the broad-angle backlight and the multiview backlight is divided into a first zone and a second zone that may be independently activated to provide the broad-angle emitted light and multiview emitted light, respectively. The multi-zone multiview display includes the broad-angle backlight and the multiview backlight and further includes an array of light valves configured to modulate the broad-angle emitted light as a two-dimensional image and the directional emitted light as a multiview image on a zone-by-zone basis. 1. A multi-zone backlight comprising:a broad-angle backlight having a first zone and a second zone, each of the first and second zones of the broad-angle backlight being configured to independently provide broad-angle emitted light when activated; anda multiview backlight divided into a first zone and a second zone, each of the first and second zones of the multiview backlight being configured to independently provide directional emitted light comprising directional light beams having directions corresponding to different view directions of a multiview image when activated,wherein the multiview backlight is adjacent to the broad-angle backlight and transparent to the broad-angle emitted light, the first and second zones of the multiview backlight corresponding to and being aligned with respective ones of the first and second zones of the broad-angle backlight.2. The multi-zone backlight of claim 1 , wherein the first zones of each of the broad-angle backlight and the multiview backlight are configured to be ...

OPTICAL DEVICE, OPTICAL SYSTEM, AND TICKET GATE

A light-guiding plate of an optical device has first light convergence portions and second light convergence portions. The light convergence portions each have optical surfaces that cause light to be emitted from an emission surface in directions in which the light substantially converges at or scatters from one convergence point or one convergence line, the convergence points or lines for the light convergence portions are different from each other, first and second images are formed by a collection of the convergence points or lines of the first and second light convergence portions, respectively, and in a case where an image is projected to a plane perpendicular to the emission surface and parallel to a light-guiding direction of the light-guiding plate, the first and second light convergence portions cause light to be emitted from the emission surface at a first angle and at a second angle, respectively. 1. An optical device comprising:a light-guiding plate that guides light in a plane parallel to an emission surface that emits light,wherein the light-guiding plate hasa plurality of first light convergence portions that are provided in a first region, receive light guided by the light-guiding plate, and each have optical surfaces that cause light to be emitted from the emission surface in directions in which the light substantially converges at one convergence point or one convergence line in a space, or substantially scatters from one convergence point or one convergence line in the space, anda plurality of second light convergence portions that are provided in a second region that is different from the first region along a light-guiding direction in which the light-guiding plate guides light, receive light guided by the light-guiding plate, and each have optical surfaces that cause light to be emitted from the emission surface in directions in which the light substantially converges at one convergence point or one convergence line in the space, or ...

DUTY CYCLE, DEPTH, AND SURFACE ENERGY CONTROL IN NANO FABRICATION

Techniques for fabricating slanted surface-relief structures are disclosed. In some embodiments, a method for of fabricating a target slanted surface-relief structure, such as a nanoimprint lithography (NIL) mold or a slanted surface-relief grating, includes manufacturing a preliminary surface-relief structure that includes a plurality of ridges and modifying a parameter of the preliminary surface-relief structure to make the target slanted surface-relief structure. The parameter includes a width of each of the plurality of ridges, a height of each of the plurality of ridges, a surface energy of the preliminary surface-relief structure, or a slant angle of an edge of the plurality of ridges. Modifying the parameter includes depositing a material layer on the preliminary surface-relief structure and etching or surface-treating the material layer. 1. A method of fabricating a nanoimprint lithography (NIL) mold with a target surface-relief structure , the method comprising:manufacturing a preliminary surface-relief structure of the NIL mold, the preliminary surface-relief structure comprising a plurality of ridges, wherein a parameter of the preliminary surface-relief structure is different from a corresponding parameter of the target surface-relief structure; and depositing a material layer on the preliminary surface-relief structure; and', 'etching or surface-treating the deposited material layer to make the target surface-relief structure, wherein the target surface-relief structure includes the preliminary surface-relief structure and is different from the preliminary surface-relief structure in at least one of a height or a slant angle of a ridge in the plurality of ridges., 'modifying the parameter of the preliminary surface-relief structure to make the target surface-relief structure, wherein modifying the parameter of the preliminary surface-relief structure comprises2. The method of claim 1 , wherein the NIL mold comprises a master NIL mold or a soft stamp for ...

Backlight Unit, Method for Manufacturing the Same and Display Device

A backlight unit, a method for manufacturing the same and a display device are provided. The backlight unit includes a light guide plate, an LED layer and an optical microstructure layer. The light guide plate includes a light incident surface and a light exit surface opposite to the light incident surface. The LED layer is provided on the light incident surface of the light guide plate, and includes plural LED chips arranged in an array. The optical microstructure layer is provided on one of the light incident surface and the light exit surface of the light guide plate, and includes plural optical microstructures in one-to-one correspondence with the plural LED chips. Each of the plural optical microstructures is configured to cause at least a portion of light emitted from a corresponding LED chip to propagate in the light guide plate by total internal reflection. 1. A backlight unit , comprisinga light guide plate comprising a light incident surface and a light exit surface opposite to the light incident surface;an LED layer provided on the light incident surface of the light guide plate, and comprising a plurality of LED chips arranged in an array; andan optical microstructure layer provided on one of the light incident surface and the light exit surface of the light guide plate, and comprising a plurality of optical microstructures in one-to-one correspondence with the plurality of LED chips, wherein each of the plurality of optical microstructures is configured to cause at least a portion of light emitted from a corresponding LED chip to propagate in the light guide plate by total internal reflection.2. The backlight unit according to claim 1 , wherein each of the plurality of optical microstructures is a holographic grating structure.3. The backlight unit according to claim 2 , wherein the optical microstructure layer is provided between the light guide plate and the LED layer claim 2 , and each of the plurality of optical microstructures is a transmissive ...

LIGHT PROJECTING METHOD AND DEVICE

A waveguide comprises a first surface and a second surface. The first surface comprises a first plurality of grating structures. The waveguide is configured to guide an in-coupled light beam to undergo total internal reflection between the first surface and the second surface. The first grating structures are configured to disrupt the total internal reflection to cause at least a portion of the in-coupled light beam to couple out of the waveguide and project from the first surface, the portion of the in-coupled light beam coupled out of the waveguide forming out-coupled light beams, the out-coupled light beams being configured to form an array of dots on a surface where the out-coupled light beams are projected on. 1. A waveguide , comprising: a first surface and a second surface , wherein:the first surface comprises a first plurality of grating structures;the waveguide is configured to guide an in-coupled light beam to undergo total internal reflection between the first surface and the second surface;the first grating structures are configured to disrupt the total internal reflection to cause at least a portion of the in-coupled light beam to couple out of the waveguide and project from the first surface, the portion of the in-coupled light beam coupled out of the waveguide forming out-coupled light beams;andthe out-coupled light beams converge from the first surface to form an upright cone of light on top of the first plurality of grating structures.2. The waveguide of claim 1 , wherein:after converging from the first surface to form an upright cone of light, the out-coupled light beams diverge to form an inverted cone of light above the upright cone of light; anda cross-section of the upright or inverted cone parallel to the first surface comprises an array of dots corresponding to the out-coupled light beams.3. The waveguide of claim 1 , further comprising a fourth surface and a light-absorbing material layer claim 1 , wherein:a remainder of the in-coupled light ...

LIGHT PROJECTING METHOD AND DEVICE

A waveguide comprises a first surface and a second surface. The second surface comprises a first plurality of grating structures. The waveguide is configured to guide an in-coupled light beam to undergo total internal reflection between the first surface and the second surface. The grating structures are configured to disrupt the total internal reflection to cause at least a portion of the in-coupled light beam to couple out of the waveguide from the first surface, the portion of the in-coupled light beam coupled out of the waveguide forming out-coupled light beams. The waveguide further comprises a reflective layer disposed on the second surface and covering the first grating structures. 1. A waveguide , comprising: a first surface and a second surface , wherein:the second surface comprises a first plurality of grating structures;the waveguide is configured to guide an in-coupled light beam to undergo total internal reflection between the first surface and the second surface;the grating structures are configured to disrupt the total internal reflection to cause at least a portion of the in-coupled light beam to couple out of the waveguide from the first surface, the portion of the in-coupled light beam coupled out of the waveguide forming out-coupled light beams; andthe waveguide further comprises a reflective layer disposed on the second surface and covering the first grating structures.2. The waveguide of claim 1 , wherein:the reflective layer comprises one or more sub-layers, each sub-layer comprising at least one of: aluminum, silver, gold, copper, titanium, chromium, nickel, germanium, indium, tin, platinum, palladium, zinc, aluminum oxide, silver oxide, gold oxide, copper oxide, titanium oxide, chromium oxide, nickel oxide, germanium oxide, indium oxide, tin oxide, platinum oxide, palladium oxide, zinc oxide, aluminum nitride, silver nitride, gold nitride, copper nitride, titanium nitride, chromium nitride, nickel nitride, germanium nitride, indium nitride, ...

LIGHT PROJECTING METHOD AND DEVICE

A waveguide comprises a first surface and a second surface. The first surface comprises a first plurality of grating structures. The waveguide is configured to guide an in-coupled light beam to undergo total internal reflection between the first surface and the second surface. The first grating structures are configured to disrupt the total internal reflection to cause at least a portion of the in-coupled light beam to couple out of the waveguide and project from the first surface, the portion of the in-coupled light beam coupled out of the waveguide forming out-coupled light beams, the out-coupled light beams being configured to form an array of dots on a surface where the out-coupled light beams are projected on. 130.-. (canceled)31. A waveguide , comprising: a first surface and a second surface , wherein:the first surface comprises a first plurality of grating structures;the waveguide is configured to guide an in-coupled light beam to undergo total internal reflection between the first surface and the second surface;the first plurality of grating structures are configured to disrupt the total internal reflection to cause at least a portion of the in-coupled light beam to couple out of the waveguide from the first surface, the portion of the in-coupled light beam coupled out of the waveguide forming out-coupled light beams;the first surface is in an x-y plane comprising an x-direction and a y-direction perpendicular to each other;the in-coupled light beam propagates inside the waveguide substantially along the x-direction of the x-y plane;the out-coupled light beams propagate substantially along a z-direction normal to the x-y plane;the first plurality of grating structures are each associated with a grating depth and a duty cycle in the x-y plane with respect to the z-direction; andthe first plurality of grating structures at different x-direction positions have at least one of: different grating depths or different grating duty cycles.32. The waveguide of claim ...

GRATING COUPLERS WITH A SILICIDE MIRROR

Structures for a grating coupler and methods of fabricating a structure for a grating coupler. A silicide layer is formed on a patterned section of a semiconductor layer. The grating structures of a grating coupler are formed over the silicide layer and the section of the semiconductor layer. 1. A structure comprising:a semiconductor substrate;a first dielectric layer on the semiconductor substrate;a semiconductor layer including a section on the first dielectric layer, the semiconductor layer comprised of a single-crystal semiconductor material;a silicide layer on the section of the semiconductor layer, the silicide layer in direct contact with the section of the semiconductor layer along an interface;a second dielectric layer over the section of the semiconductor layer and the silicide layer, the second dielectric layer including a portion in contact with the silicide layer;a grating coupler including a plurality of grating structures positioned on the second dielectric layer over the silicide layer and the section of the semiconductor layer; anda waveguide positioned on the second dielectric layer, the waveguide coupled with the grating coupler.2. The structure of wherein the silicide layer is positioned between the grating coupler and the section of the semiconductor layer.3. (canceled)4. The structure of wherein the section of the semiconductor layer includes a first portion having a first thickness and a second portion having a second thickness claim 1 , and the silicide layer is disposed on the first portion of the section of the semiconductor layer and on the second portion of the section of the semiconductor layer.5. The structure of wherein the plurality of grating structures are comprised of silicon nitride.6. The structure of wherein the silicide layer and the section of the semiconductor layer provide a bilayer mirror.7. The structure of wherein the section of the semiconductor layer comprises a section of a device layer of a silicon-on-insulator wafer. ...

COMPACT HEAD-MOUNTED DISPLAY SYSTEM HAVING UNIFORM IMAGE

There is disclosed an optical device, including a light-transmitting substrate having an input aperture, an output aperture, at least two major surfaces and edges, an optical element for coupling light waves into the substrate by total internal reflection, at least one partially reflecting surface located between the two major surfaces of the light-transmitting substrate for partially reflecting light waves out of the substrate, a first transparent plate, having at least two major surfaces, one of the major surfaces of the transparent plate being optically attached to a major surface of the light-transmitting substrate defining an interface plane, and a beam-splitting coating applied at the interface plane between the substrate and the transparent plate, wherein light waves coupled inside the light-transmitting substrate are partially reflected from the interface plane and partially pass therethrough. 1. An optical device , comprising:a light-guide optical element having a two major surfaces and edges, an input aperture through which light waves enter the light-guide optical element and an output aperture through which the light waves exit the light-guide optical element;at least one optical element for coupling-out the light waves out of the light-guide optical element,at least one beam-splitting surface embedded inside the light-guide optical element, wherein the light waves coupled inside the light-guide optical element undergo a plurality of reflections from and passing's through the at least one beam-splitting surface, andwherein the light waves undergo a plurality of total internal reflections off said two major surfaces between said input aperture and said output aperture.2. The optical device according to claim 1 , wherein said at least one optical element for coupling-out the light waves out of the light-guide includes at least one partially reflecting surface located between the two major surfaces of the light-guide optical element.3. The optical device ...

High-Speed Wavelength-Scale Spatial Light Modulators with Two-Dimensional Tunable Microcavity Arrays

A reflective spatial light modulator (SLM) made of an electro-optic material, such as barium titanate, in a one-sided Fabry-Perot resonator can provide phase and/or amplitude modulation with fine spatial resolution at speeds over a Gigahertz. The light is confined laterally within the electro-optic material/resonator layer stack with microlenses, index perturbations, or by patterning the layer stack into a two-dimensional (2D) array of vertically oriented micropillars. Alternatively, a photonic crystal guided mode resonator can provide vertical and lateral confinement of the resonant mode. In phase-only modulation mode, each pixel in the SLM can produce a π phase shift under a bias voltage below 10 V, while maintaining nearly constant reflection amplitude. The methodology for designing this SLM could also be used to design other SLMs (for example, amplitude-only SLMs). This high-speed SLM can be used in a wide range of new applications, from fully tunable metasurfaces to optical computing accelerators, high-speed interconnects, true 2D phased array beam steering, beam forming, or quantum computing with cold atom arrays.

Backlight module and liquid crystal display

The present invention discloses a backlight module and a liquid crystal display. The light guide plate is formed with hollow structures therein, and the hollow structures includes a first reflecting surface and a second reflecting surface; the first reflecting surface has a first inclination; the second reflecting surface has a second inclination; based on the first inclination, the first reflecting surface reflects light emitting toward the first reflecting surface; and based on the second inclination, the second reflecting surface reflects light emitting toward the second reflecting surface.

A LIGHT EMITTING DEVICE

A light emitting device () comprising a plurality of first light sources () adapted for, in operation, emitting first light () with a first spectral distribution, and a first light guide () comprising a first light input surface (, the first light guide being adapted for receiving the first light with the first spectral distribution at the first light input surface, converting at least a part of the first light with the first spectral distribution to second light () with a second spectral distribution, and guiding the second light to the first light input surface, the light emitting device further comprising one first light out-coupling element () for coupling light out of the first light input surface, the first light out-coupling element being arranged in or on the first light input surface at a pre-selected location on a plane in which the first light input surface extends. 1. A light emitting device comprising:a plurality of first light sources adapted for, in operation, emitting first light with a first spectral distribution, anda first light guide comprising a first light input surface,the first light guide being adapted for receiving the first light with the first spectral distribution at the first light input surface, converting at least a part of the first light with the first spectral distribution to second light with a second spectral distribution, and guiding the second light to the first light input surface,the light emitting device further comprising a first light out-coupling element for coupling light out of the first light input surface, the first light out-coupling element being arranged in or on the first light input surface at a pre-selected location on a plane in which the first light input surface extends,wherein the first light out-coupling element is arranged in or on the first light input surface at the center of the first light input surface.2. (canceled)3. A light emitting device according to claim 1 , wherein the first light input surface ...

Dual light guide grating-based backlight and electronic display using same

Dual light guide, grating-based backlighting redirects light guided in a first light guide in a first direction into a second light guide in a second direction of a grating-based backlight. A dual light guide, grating-based backlight includes the first light guide, the second light guide and a redirection coupler configured to redirect the guided light beam from the first light guide into the second light guide in the second direction. The dual light guide, grating-based backlight further includes a diffraction grating configured to diffractively couple out a portion of the redirected light beam from the second light guide as a coupled-out light beam directed away from a surface of the second light guide at a predetermined principal angular direction.

Holographic Waveguide Optical Tracker

There is provided an object tracker comprising: a first waveguide; a source of illumination light; a detector optically coupled to said waveguide; and at least one grating lamina formed within said waveguide. Illumination light propagating along a first optical path from said source to an object in relative motion to the object tracker. Image light reflected from at least one surface of an object is deflected by said grating lamina into a second optical path towards said detector. 1. An object tracker for tracking an object comprising:a first waveguide;a source of light for illuminating said object having at least one surface;a detector optically coupled to said first waveguide; anda first grating formed within said first waveguide,wherein image light reflected from said at least one surface of said object is deflected by said first grating into a total internal reflection (TIR) path towards said detector,wherein said first grating comprises a plurality of grating elements, each having a grating vector configured to provide a unique perspective view of said object.2. The object tracker of claim 1 , wherein said object tracker and said object are in relative motion.3. The object tracker of wherein said first grating element switchable between a diffracting state and a non-diffracting state.4. The object tracker of claim 1 , wherein said first grating comprises at least one switchable grating element having a diffracting state and a non-diffracting state claim 1 , wherein said at least one switchable grating element in said diffracting state deflects said image light into said TIR path towards said detector.5. The object tracker of claim 1 , wherein said first grating comprises at least one elongated grating element with a longer dimension aligned perpendicular to a principal waveguide path defined within the first waveguide.6. The object tracker of claim 1 , further comprising at least one selected from the group consisting of:an input grating or a prism for coupling ...

Color shifting illuminator

A color shifting illuminator includes a first luminescent material that absorbs first incident photons having an energy greater than or equal to a first threshold energy, and emits first photons with less energy than the first incident photons. The color shifting illuminator also includes a second luminescent material that absorbs second incident photons having an energy greater than or equal to a second threshold energy, and emits second photons with less energy than the second incident photons and less energy than the first photons. The first luminescent material and the second luminescent material are included in a waveguide, and the waveguide exhibits total internal reflection for the first photons and the second photons satisfying conditions for total internal reflection. An extraction region is coupled to the waveguide to emit the first photons and the second photons.

Waveguide Device with Uniform Output Illumination

Various embodiments of waveguide devices are described. A debanding optic may be incorporated into waveguide devices, which may help supply uniform output illumination. Accordingly, various waveguide devices are able to output a substantially flat illumination profile eliminating or mitigating banding effects. 1. A waveguide device comprising:at least one optical substrate;at least one light source;at least one light coupler capable of coupling incident light from the light source with an angular bandwidth into a total internal reflection (TIR) within the at least one optical substrate such that a unique TIR angle is defined by each light incidence angle as determined at the input grating;at least one light extractor for extracting the light from the optical substrate; anda debanding optic capable of mitigating banding effects of an illuminated pupil, such that the extracted light is a substantially flat illumination profile having mitigated banding.2. The waveguide device of claim 1 , wherein the extracted light has a spatial non-uniformity less than one of either 10% or 20%.3. (canceled)4. The waveguide device of claim 1 , wherein the debanding optic is an effective input aperture such that when the optical substrate has a thickness D claim 1 , the input aperture is configured to provide a TIR angle U in the optical substrate claim 1 , and the angle U is calculated by 2D tan (U).5. The waveguide device of claim 4 , wherein the debanding optic provides spatial variation of the light along the TIR path of at least one of diffraction efficiency claim 4 , optical transmission claim 4 , polarization or birefringence.6. The waveguide device of claim 1 , wherein the debanding optic is at least one grating selected from at least one input grating and at least one output grating claim 1 , and wherein the selected at least one grating is a configuration selected from the group of:multiple gratings, such that each grating provides a small pupil shift to mitigate banding;a ...

Light guide plate, surface source device and transmission-type display device

A light guide plate 13 has a number of back surface-side unit optical structures 131 arranged in a back surface 13 d along a light guide direction. Each back surface-side unit optical structure 131 is tapered in a direction away from a light exit surface 13 c , and has a first inclined surface 132 lying on the light entrance surface side, a second inclined surface ( 133 ) lying opposite the first inclined surface and which totally reflects at least part of incident light, and a top surface region 134 lying between the first inclined surface 132 and the second inclined surface 133 , and located farthest from the light exit surface 13 c . The top surface regions 134 each include a plurality of surfaces 134 a to 134 d which are parallel to the light exit surface 13 c and have different heights “h” in the direction away from the light exit surface 13 c.

LIGHT GUIDE PLATE AND METHOD FOR MANUFACTURING SAME

A light guide plate includes a first transparent base layer, an adhesive layer and a transparent composite layer. The adhesive layer is configured for bonding the transparent composite layer on the first transparent base layer. The transparent composite layer is located on the adhesive layer, and the transparent composite layer comprising a light emitting surface, the light emitting surface includes a plurality of microstructures. 1. A light guide plate comprising:a first transparent base layer and a transparent composite layer having a light emitting surface comprising a plurality of microstructures; andan adhesive layer bonding the first transparent base layer to the transparent composite layer.2. The light guide plate of claim 1 , wherein a refractive index of the transparent composite layer is larger than a refractive index of the first transparent base layer.3. The light guide plate of claim 2 , wherein a refractive index of the adhesive layer is between a refractive index of the first transparent base layer and a refractive index of the transparent composite layer.4. The light guide plate of claim 1 , wherein the microstructures are V-shaped grooves.5. The light guide plate of claim 1 , wherein thicknesses of both the first transparent base layer and the transparent composite layer are less than 100 micron claim 1 , a thickness of the adhesive layer is less than 50 micron.6. The light guide plate of claim 1 , wherein the transparent composite layer comprises a second transparent base layer and a microstructure layer located on the second transparent base layer claim 1 , the microstructures are formed on the surface of the microstructure layer away from the second transparent base layer claim 1 , a material of the second transparent base layer is the same as a material of the microstructure layer.7. The light guide plate of claim 1 , wherein the transparent composite layer comprises a second transparent base layer and a microstructure layer located on the ...

DIGITAL PIXEL WITH EXTENDED DYNAMIC RANGE

Examples of an apparatus are disclosed. In some example, an apparatus includes a photodiode configured to generate a charge in response to incident light; a measurement capacitor to store at least a part of the charge to generate a voltage; and an analog-to-digital converter (ADC) circuit configured to: in a first measurement period, compare the voltage at the measurement capacitor against a static threshold voltage to generate a first output; in a second measurement period, compare the voltage against a varying threshold voltage to generate a second output, wherein the varying threshold voltage varies with time according to a pre-determined pattern; and generate a final output representing an intensity of the incident light based on either the first output or the second output. 1. An apparatus comprising:a photodiode configured to generate a charge in response to incident light;a measurement capacitor to store at least a part of the charge to generate a voltage; and in a first measurement period, compare the voltage at the measurement capacitor against a static threshold voltage to generate a first output;', 'in a second measurement period, compare the voltage against a varying threshold voltage to generate a second output, wherein the varying threshold voltage varies with time according to a pre-determined pattern; and', 'generate a final output representing an intensity of the incident light based on either the first output or the second output., 'an analog-to-digital converter (ADC) circuit configured to2. The apparatus of claim 1 , wherein the ADC is configured to:provide the first output as the final output based on determining that the voltage becomes equal to the static threshold voltage in the first measurement period; andprovide the second output as the final output based on determining that the voltage becomes equal to the varying threshold voltage in the second measurement period, and based on determining that the voltage does not become equal to the ...

LIGHT GUIDE PLATE, METHOD FOR FABRICATING THE SAME, BACKLIGHT UNIT INCLUDING THE SAME, AND LIQUID CRYSTAL DISPLAY INCLUDING THE SAME

Embodiments of the present invention provide a light guide plate, a method for fabricating the same, a backlight unit including the same, and a liquid crystal display including the same. The light guide plate may include a base layer, a first coating layer formed on one surface of the base layer and including a first optical pattern having a curved surface at a top portion thereof, and a second coating layer formed on the other surface of the base layer and including a second optical pattern. The first optical pattern has an aspect ratio of about 0.10 to about 0.50 and a radius of curvature of the curved surface of about 10 μm to about 35 μm, and the second optical pattern has an aspect ratio of about 0.01 to about 0.07. 1. A light guide plate comprising:a base layer;a first coating layer on a first surface of the base layer and comprising a first optical pattern having a curved surface at a top portion thereof; anda second coating layer on a second surface of the base layer and comprising a second optical pattern,wherein the first optical pattern has an aspect ratio of about 0.10 to about 0.50 and a radius of curvature of the curved surface of about 10 μm to about 35 μm, andthe second optical pattern has an aspect ratio of about 0.01 to about 0.07.2. The light guide plate according to claim 1 , wherein the first optical pattern comprises at least one of a lenticular lens pattern claim 1 , a prism pattern having a curved surface at a top portion thereof claim 1 , a micro-lens pattern claim 1 , or an embossed pattern.3. The light guide plate according to claim 1 , wherein the second optical pattern comprises at least one of a prism pattern claim 1 , a micro-lens pattern claim 1 , an embossed pattern claim 1 , or a lenticular lens pattern.4. The light guide plate according to claim 1 , wherein the base layer has a refractive index of about 1.50 to about 1.60.5. The light guide plate according to claim 1 , wherein each of the first coating layer and the second coating ...

BACKLIGHT UNIT

A back light unit includes a light source and a light guide unit having a first surface emitting light to a display panel, a second surface facing the first surface, and a plurality of connecting surfaces connecting the first surface and the second surface. The connecting surfaces includes a first side surface, a second side surfaces and a third side surface between the first side surface and a second side surface, A first included angle of the first incident surface and the first diffusion surface is equal to or greater than about 90 degree. 1. A display device comprising:a display panel; anda backlight unit configured to provide a light to the display panel, a light source emitting the light; and', 'a light guide unit that includes a first surface, a second surface facing the first surface, and a plurality of connecting surfaces connecting the first surface and the second surface, the connecting surfaces comprising:', 'a plurality of side surfaces;', 'a first incident surface disposed in a corner area of the light guide unit; and', 'a plurality of diffusion surfaces disposed in the corner area of the light guide unit,', 'wherein the plurality of diffusion surfaces has a first diffusion surface and a second diffusion surface,', 'the first incident surface and the plurality of diffusion surfaces define a polygon in a plan view, and', 'a first interior angle of the polygon defined by the first incident surface and the first diffusion surface is equal to or greater than about 90 degree, and', 'a second interior angle of the polygon defined by the first incident surface and the second diffusion surface is smaller than the first interior angle., 'wherein the backlight unit comprising2. The display device of claim 1 , wherein the plurality of side surfaces includes a first side surface and a second side surface claim 1 ,the first incident surface disposed between the first side surface with the second side surface, andthe first diffusion surface is closer to the first ...

WHITE LIGHT SOURCE

A white light source includes an array of light emitting elements arranged to a light guide. 1. A white light source comprising an array of non-white light emitting elements each of said light emitting elements being arranged to provide , in operation , a divergent light beam , said array of light emitting elements being arranged to a light guide comprising at least a first surface and a second surface facing said first surface ,wherein:said light emitting elements are arranged on a substrate comprising at least one electrical conducting wire connected to said light emitting elements;at least a light incoupling array comprises light incoupling elements arranged on said first surface, each of said light emitting elements facing a light incoupling elements;said substrate being separated from said first surface by at least a gap layer;said gap layer having an effective refractive index at least 0.2 lower than a refractive index of the light guide;{'sub': '1', 'each of said light incoupling elements being arranged to incouple in said light guide a portion of said divergent light beam, said portion defining an incoupled light beam, said incoupling elements being further arranged so that the in-coupled angle of at least a part of the light rays of said in-coupled light beam are higher than 45°, said in-coupled angles being defined relative to a normal (N) of said first surface;'}{'sub': '2', 'at least an array of light homogenizing elements is arranged on said second surface, each of said light homogenizing elements facing a light in-coupling element, said light homogenizing elements being non-uniform structures arranged so that the deflection angle of at least a fraction of the incident part of said in-coupled light beam incident on each of said homogenizing elements is higher than 45°, said deflection angle (δ) being defined as the absolute sum of the incident angle and the reflected angle of a light ray of said incident part, both angles being defined relative to a ...

ELECTROMECHANICAL DISPLACEMENT SENSOR

A displacement sensor measures capacitance between a rotor-stator pair. The displacement sensor includes a plurality of stators coupled to a first object. The plurality of stators is oriented parallel to an axis of motion between the first object and a second object. The displacement sensor further includes a plurality of rotors coupled to the second object. The plurality of rotors is oriented parallel to the axis of motion. Each rotor of the plurality of rotors is aligned with and configured to receive a corresponding stator of the plurality of stators to create a respective rotor-stator pair. Capacitance between the rotor-stator pairs change as a function of position of the first object relative to the second object along the axis of motion. An amount of displacement of the first object relative to the second object is determined based in part on the capacitance values. 1. A displacement sensor comprising:a plurality of stators coupled to a first object, the plurality of stators is oriented parallel to an axis of motion between the first object and a second object; anda plurality of rotors coupled to the second object, the plurality of rotors is oriented parallel to the axis of motion, and each rotor of the plurality of rotors is aligned with and configured to receive a corresponding stator of the plurality of stators to create a respective rotor-stator pair, and capacitance values of the rotor-stator pairs change as a function of position of the first object relative to the second object along the axis of motion,wherein an amount of displacement of the first object relative to the second object is determined based in part on the capacitance values.2. The displacement sensor of claim 1 , wherein each rotor of the plurality of rotors includes a cavity that is aligned with and configured to receive the corresponding stator claim 1 , and each rotor-stator pair has a respective nominal position in which the stator is at least partially within the cavity claim 1 , and ...

METHOD FOR MANUFACTURING OPTICAL DEVICE STRUCTURES

Embodiments described herein provide for methods of forming optical device structures. The methods utilize rotation of a substrate, to have the optical device structures formed thereon, and tunability of etch rates of a patterned resist disposed over the substrate and one of a device layer or the substrate to form the optical device structures without multiple lithographic patterning steps and angled etch steps. 1. A method , comprising:{'sub': '1', 'claim-text': two or more resist structures, each of the resist structures having a width; and', 'one or more gaps, each of the gaps defined by adjacent resist structures and having a linewidth defined by the adjacent resist structures;, 'positioning a substrate at a first rotation angle ϕin a path of a beam, the beam configured to be projected to a surface of the substrate at a beam angle ϑ relative to a surface normal of the substrate, the substrate having a patterned resist formed thereover, the patterned resist comprising{'sub': '1', 'etching the substrate positioned at the first rotation angle ϕwith the beam;'}{'sub': '2', 'rotating the substrate to a second rotation angle ϕand etching sidewalls of the resist structures oriented toward the beam such that the width of the resist structures decreases and the linewidth of the gaps increases;'}{'sub': 1', '1, 'rotating the substrate to the first rotation angle ϕand etching the substrate at the first rotation angle ϕwith the beam; and'} {'sub': 2', '2, 'repeating the rotating the substrate to the second rotation angle ϕand the etching sidewalls of the resist structures with the beam, and the rotating the substrate to the first rotation angle ϕand the etching the substrate with the beam until the resist structures are removed or the linewidth of the gaps has a predetermined linewidth.'}, 'forming two or more optical device structures in the substrate, the forming the optical device structures comprising2. The method of claim 1 , wherein the etching the substrate at the ...

Light guide plate and backlight module having the same

A light guide plate includes a light incident surface, a light emitting surface, a bottom surface, a first lateral surface, and a second lateral surface. The light incident surface has a plurality of elongated optical microstructures, and each elongated optical microstructure has an inclined surface and a curved surface connected with each other. The light guide plate is capable of increasing uniformity and utilization rate of light beam emitting from the light guide plate. A backlight module using the light guide plate is also provided.

OPTICAL SCANNING SYSTEM INCLUDING OPTICAL SCANNING DEVICE AND PHOTORECEIVER DEVICE

An optical scanning system including an optical scanning device, and a photoreceiver device. The optical scanning device includes: a first waveguide array including a plurality of first waveguides; and a first phase shifter for adjusting phases of light propagating through the plurality of first waveguides to change an emission direction of emission light from the plurality of first waveguides. The photoreceiver device includes: a second waveguide array including a plurality of second waveguides configured to receive reflected light and propagate the received reflected light; and a second phase shifter for adjusting phases of the received reflected light propagating through the plurality of second waveguides to change a reception direction of the reflected light received by the plurality of second waveguides. An array pitch of the plurality of first waveguides in the optical scanning device differs from an array pitch of the plurality of second waveguides in the photoreceiver device. 1. An optical scanning system comprising:an optical scanning device; anda photoreceiver device, a first waveguide array including a plurality of first waveguides; and', 'a first phase shifter configured to adjust phases of light propagating through the plurality of first waveguides to change an emission direction of emission light from the plurality of first waveguides,, 'wherein the optical scanning device includes a second waveguide array including a plurality of second waveguides configured to receive reflected light and propagate the received reflected light; and', 'a second phase shifter configured to adjust phases of the received reflected light propagating through the plurality of second waveguides to change a reception direction of the reflected light received by the plurality of second waveguides, and, 'wherein the photoreceiver device includeswherein an array pitch of the plurality of first waveguides in the optical scanning device differs from an array pitch of the plurality ...

Unilateral backlight, multiview display, and method employing slanted diffraction gratings

A unilateral backlight and a unilateral multiview display employ an array of unilateral diffractive elements configured to provide directional light beams having a unilateral direction. A unilateral diffractive element of the unilateral diffractive element array comprises a slanted diffraction grating configured to provide a directional light beam by diffractive scattering of light guided in a light guide. The unilateral multiview display further includes light valves configured to modulate a plurality of directional light beams as multiview image having the unilateral direction.

BRAGG-LIKE GRATINGS ON HIGH REFRACTIVE INDEX MATERIAL

Techniques for fabricating a slanted structure are disclosed. In one embodiment, a method for fabricating a slanted structure on a material layer includes forming a mask layer on the material layer, and implanting ions into a plurality of regions of the material layer at a slant angle greater than zero using an ion beam and the mask layer. The slant angle is measured with respect to a surface normal of the material layer. Implanting the ions into the plurality of regions of the material layer changes a refractive index or an etch rate of the plurality of regions of the material layer. In some embodiments, the method further includes wet-etching the material layer using an etchant to remove materials in the plurality of regions of the material layer. In some embodiments, the method includes either simultaneous or post-implantation etching of modified material through a dry etching process using reactive etchants in feed gas. 1. A method of fabricating a slanted structure on a material layer , the method comprising:forming a mask layer on the material layer; andimplanting ions into a plurality of regions of the material layer at a slant angle greater than zero using an ion beam and the mask layer, wherein the slant angle is measured with respect to a surface normal of the material layer,wherein implanting the ions into the plurality of regions of the material layer changes a refractive index or an etch rate of the plurality of regions of the material layer.2. The method of claim 1 , wherein the material layer comprises one or more of a transparent substrate claim 1 , a semiconductor substrate claim 1 , a SiOlayer claim 1 , a SiNmaterial layer claim 1 , a titanium oxide layer claim 1 , an alumina layer claim 1 , a SiC layer claim 1 , a SiONlayer claim 1 , an amorphous silicon layer claim 1 , a spin on carbon (SOC) layer claim 1 , an amorphous carbon layer (ACL) claim 1 , a diamond like carbon (DLC) layer claim 1 , a TiOlayer claim 1 , an AlOlayer claim 1 , a TaOlayer ...

Generating a virtual content display

A method of generating a virtual image, including directing a light beam to a first side of an eyepiece, including transmitting the light beam into a first waveguide of the eyepiece; deflecting, by first diffractive elements of the first waveguide, a first portion of the light beam towards a second waveguide of the eyepiece, the first portion of the light beam associated with a first phase of light; deflecting, by protrusions on the first side of the eyepiece, a second portion of the light beam towards the second waveguide, the second portion of the light beam associated with a second phase of light differing from the first phase; and deflecting, by second diffractive elements of the second waveguide, some of the first and the second portions of the light beam to provide an exiting light beam associated with the virtual image that is based on the first and second phases.

Light guide plate, planar light source apparatus, display apparatus, and electronic device

An object is to promote a reduction in thickness of a light guide plate and suppress brightness non-uniformity of the light guide plate. A light guide plate, including: a light exit surface from which light is emitted; an opposite surface on an opposite side of the light exit surface; a depressed portion provided on the opposite surface; and a plurality of scattering portions which are provided on the light exit surface, the opposite surface, and a bottom surface of the depressed portion and which refract and scatter light, wherein the depressed portion has a tapered surface which spreads from the bottom surface of the depressed portion toward an opening of the depressed portion.

LIGHT-GUIDE OPTICAL ELEMENT WITH MULTIPLE-AXIS INTERNAL APERTURE EXPANSION

An optical device includes a lightguide having a first pair of external surfaces parallel to each other, and at least two sets of facets. Each of the sets including a plurality of partially reflecting facets parallel to each other, and between the first pair of external surfaces. In each of the sets of facets, the respective facets are at an oblique angle relative to the first pair of external surfaces, and at a non-parallel angle relative to another of the sets of facets. The optical device is particularly suited for optical aperture expansion. 122-. (canceled)24. The method of wherein said optically attaching is performed by pressing together said first and second arrays with a flowable adhesive between said first and second arrays.25. The method of wherein a first angle of said partially reflecting facets in said first array is different from a second angle of said partially reflecting facets in said second array claim 23 , said angles being relative to respective external surfaces of said arrays.26. The method of wherein a first angle of said partially reflecting facets in said first array is substantially the same as a second angle of said partially reflecting facets in said second array claim 23 , said angles being relative to respective external surfaces of said arrays claim 23 , and said first array is rotated relative to said second array prior to optically attaching said arrays.2729-. (canceled) The present invention generally relates to optical aperture expansion.Near eye display for augmented reality is based on a projector having a small aperture and a lightguide that multiplies (expands) this small aperture to project a larger aperture to illuminate a desired eye-box. If the projecting aperture is wide, then the expansion is in one dimension. If the projecting aperture is small (for example, in a two-dimensional (2D) lightguide), then the lightguide expansion is in two dimensions.Certain embodiments of the present invention provide a light-guide ...

Backlight module and liquid crystal display device

A backlight module and a liquid crystal display device are provided. By forming a diffusion layer on a light emitting surface of each of a plurality of light emitting diodes (LEDs), a light shadow and a LED light path generated by misalignment between the LEDs and a light guide plate and deformation of a reflective sheet can be effectively avoided. The backlight module emits light of uniform brightness to improve display performance of the liquid crystal display device.

COLLIMATING FIBER SCANNER DESIGN WITH INWARD POINTING ANGLES IN VIRTUAL/AUGMENTED REALITY SYSTEM

A display subsystem for a virtual image generation system. The display subsystem comprises a planar waveguide apparatus, and an optical fiber having a distal tip affixed relative to the planar waveguide apparatus, and an aperture proximal to the distal tip. The display subsystem further comprises at least one light source coupled the optical fiber and configured for emitting light from the aperture of the optical fiber, and a mechanical drive assembly to which the optical fiber is mounted to the drive assembly. The mechanical drive assembly is configured for displacing the aperture of the optical fiber in accordance with a scan pattern. The display subsystem further comprises an optical waveguide input apparatus configured for directing the light from the aperture of the optical fiber down the planar waveguide apparatus, such that the planar waveguide apparatus displays one or more image frames to the end user. 1. A display subsystem for a virtual image generation system for use by an end user , comprising:a planar waveguide apparatus;an optical fiber having a distal tip affixed relative to the planar waveguide apparatus, and an aperture proximal to the distal tip;at least one light source coupled the optical fiber and configured for emitting light from the aperture of the optical fiber;a mechanical drive assembly to which the optical fiber is mounted to the drive assembly, the mechanical drive assembly configured for displacing the aperture of the optical fiber in accordance with a scan pattern;an optical waveguide input apparatus configured for directing the light from the aperture of the optical fiber down the planar waveguide apparatus, such that the planar waveguide apparatus displays one or more image frames to the end user.2. The display subsystem of claim 1 , wherein the distal tip of the optical fiber is mounted to the planar waveguide apparatus.3. The display subsystem of claim 1 , further comprising a collimation element configured for collimating light ...

Near-Eye Display With Self-Emitting Microdisplay Engine

A near-eye display for an augmented reality display system couples a self-emitting microdisplay to a transmissive waveguide through an input coupler. Light from the self-emitting microdisplay propagates along the waveguide and through an output coupler for generating a virtual image that is visible together with a real-world scene through the waveguide within an eyebox located in front of the output coupler. A light sensor detects light levels within different portions of the real world scene visible within the eyebox. Drive electronics control the light output from individual pixels of the self-emitting microdisplay to preserve desired local contrast values between the virtual image and the real-world scene. 1. An augmented reality near-eye display comprising a see-through optic that conveys a virtual image produced by a two-dimensional image light source comprising an array of pixels , wherein the light source is controllable to modulate light output from each pixel individually to optimize contrast of the virtual image compared to an instant real-world scene that is visible through the optic.2. The display of further comprising a light sensor for detecting light levels within the instant real-world scene and drive electronics to control the modulation of the light output from the individual pixels in accordance with sensed light from the instant real-world scene.3. The display of further comprising a two-dimensional light sensor and drive electronics to control the light output from the individual pixels to preserve desired local contrast values between the virtual image and the instant real-world scene.4. The display of in which pixel power of individual pixels in a first portion of the virtual image is adjusted with respect to the pixel power of individual pixels in a second portion of the virtual image in accordance with different local light levels of the instant real-world scene that overlap the first and second portions of the virtual image.5. The display ...

COMPACT HEAD-MOUNTED DISPLAY SYSTEM HAVING UNIFORM IMAGE

There is disclosed an optical device, including a light-transmitting substrate having an input aperture, an output aperture, at least two major surfaces and edges, an optical element for coupling light waves into the substrate by total internal reflection, at least one partially reflecting surface located between the two major surfaces of the light-transmitting substrate for partially reflect ing light waves out of the substrate, a first transparent plate, having at least two major surfaces, one of the major surfaces of the transparent plate being optically attached to a major surface of the light-transmitting substrate defining an interface plane, and a beam-splitting coating applied at the interface plane between the substrate and the transparent plate, wherein light waves coupled in side the light-transmitting substrate are partially reflected from the interface plane and partially pass therethrough. 1. An optical device , comprising:a light-transmitting substrate having an input aperture, an output aperture, at least two major surfaces and edges;an optical element for coupling light waves into the substrate by total internal reflection;at least one partially reflecting surface located between the two major surfaces of the light-transmitting substrate for partially reflecting light waves out of the substrate;a first transparent plate, having at least two major surfaces, one of the major surfaces of the transparent plate being optically attached to a major surface of the light-transmitting substrate defining an interface plane, anda beam-splitting coating applied at the interface plane between the substrate and the transparent plate,wherein light waves coupled inside the light-transmitting substrate are partially reflected from the interface plane and partially pass therethrough.2. The optical device according to claim 1 , wherein light waves coupled out the substrate by the partially reflecting surface claim 1 , substantially pass through the interface plane ...

NANOGRATING METHOD AND APPARATUS

A method of manufacturing a waveguide having a combination of a binary grating structure and a blazed grating structure includes cutting a substrate off-axis, depositing a first layer on the substrate, and depositing a resist layer on the first layer. The resist layer includes a pattern. The method also includes etching the first layer in the pattern using the resist layer as a mask. The pattern includes a first region and a second region. The method further includes creating the binary grating structure in the substrate in the second region and creating the blazed grating structure in the substrate in the first region. 1. A method of manufacturing a waveguide having a multi-level binary grating structure , the method comprising:coating a first etch stop layer on a first substrate;adding a second substrate on the first etch stop layer;depositing a first resist layer on the second substrate, wherein the first resist layer includes at least one first opening;depositing a second etch stop layer on the second substrate in the at least one first opening;removing the first resist layer from the second substrate;adding a third substrate on the second substrate and the second etch stop layer;depositing a second resist layer on the third substrate, wherein the second resist layer includes at least one second opening;depositing a third etch stop layer on the third substrate in the at least one second opening;removing the second resist layer from the third substrate;etching the second substrate and the third substrate, leaving the first substrate, the first etch stop layer, the second etch stop layer and the second substrate in the at least one first opening, and the third etch stop layer and the third substrate in the at least one second opening; andetching an exposed portion of the first etch stop layer, an exposed portion of the second etch stop layer, and the third etch stop layer, forming the multi-level binary grating.2. The method of claim 1 , wherein the first ...

LIGHT GUIDE OPTICAL ASSEMBLY

An optical assembly for optical aperture expansion combines facet reflective technology with diffractive technology. At least two diffractive components having opposite optical power (matching) are used, so that chromatic dispersion introduced by the first diffractive component will then be cancelled by the second diffractive component. The two diffractive components are used in combination with a reflective optical component to achieve more efficient aperture expansion (for near eye display), reducing distortions and noise, while also reducing design constraints on the system and individual components, as compared to conventional techniques. The assembly eliminates and/or reduces the need for polarization management, while enabling wider field of view. In addition, embodiments can have reduced nonuniformity, as compared to conventional single technology implementations, since the distortion patterns of the two technologies do not correlate. 1. An apparatus for optical aperture expansion comprising:(a) at least one lightguide, said lightguide including a first pair of external surfaces parallel to each other for guiding light by internal reflection;(b) a pair of first and second matching diffractive optical components; and (i) including a plurality of partially reflecting facets parallel to each other,', '(ii) between said first pair of external surfaces, and', '(iii) non-parallel relative to said first pair of external surfaces; and, '(c) a reflective optical component including a set of facets, said set of facets (i) said coupled-in light being light coupled into said at least one lightguide,', '(ii) said expanding being two-dimensional, and', '(iii) said coupled-out light being light coupled out by said reflective optical component., '(d) said components cooperating for expanding coupled-in light to coupled-out light,'}2. The apparatus of wherein(a) said first diffractive optical component is configured for directing said coupled-in light in a first direction of ...

Apparatus for Eye Tracking

An eye tracker comprises a light source; a detector; and first and second waveguides. The first waveguide comprises an input coupler for coupling source light into a waveguide path and a first grating for coupling light out of the waveguide path onto an eye. The second waveguide comprises a second grating for coupling light reflected from the eye into a waveguide path and an output coupler for coupling light out of the waveguide path onto the detector. The second grating is optically configured for imaging the eye onto the detector. 1. A eye tracker comprising:a waveguide for propagating illumination light towards an eye and propagating image light reflected from at least one surface of an eye;a light source optically coupled to said waveguide;a detector optically coupled to said waveguide; anddisposed in said waveguide at least one grating lamina for deflecting said illumination light towards said eye along a first waveguide path and deflecting said image light towards said detector along a second waveguide path.2. The apparatus of wherein at least one portion of said at least one grating lamina deflects said illumination light out of said first waveguide path and at least one portion of said at least one grating lamina deflects said image light into said second waveguide path.3. The apparatus of wherein said grating lamina comprises a multiplicity of electrically switchable elements each having a diffracting state and a non diffracting state claim 2 , wherein each said at least one portion of said at least one grating lamina is a grating element in its diffracting state.4. The apparatus of wherein said first and second waveguide paths are in opposing directions.5. The apparatus of wherein said electrically switchable elements are elongate with longer dimension aligned perpendicular to at least one of said first and second waveguide paths.6. The apparatus of wherein said at least one grating lamina comprises an illumination grating for deflecting said illumination ...

Light guiding assembly and fabricating method thereof, backlight module and display device

A light guiding assembly and a fabricating method, a backlight module, and a display device are provided. The light guiding assembly includes a waveguide layer, and a coupling grating structure including at least two gratings, wherein at least one of the at least two gratings is located inside the waveguide layer, and orthographic projections of the at least two gratings on a surface of the waveguide layer at least partially overlap, the coupling grating structure being configured such that incident light propagates in the waveguide layer.

LIGHT GUIDE PLATE, AND BACKLIGHT UNIT AND DISPLAY DEVICE INCLUDING THE SAME

The present invention relates to a light guide plate, and a backlight unit and display device including the same. According to an aspect of the present invention, there is provided a light guide plate, including: a light output surface configured to output light toward the outside; a reflective surface positioned at the opposite side of the light output surface; a light incident surface provided on at least one side surface among the side surfaces connecting the light output surface to the reflective surface to receive light irradiated from a light source; and a reflective pattern having a quadrilateral shape when viewed in a direction perpendicular to the reflective surface, and having a concave portion recessed toward an inner portion of the reflective surface and an embossed portion protruding from an edge of the concave portion toward an outer portion of the reflective surface. 1. A light guide plate , comprising:a light output surface configured to output light toward the outside;a reflective surface positioned at the opposite side of the light output surface;a light incident surface provided on at least one side surface among the side surfaces connecting the light output surface to the reflective surface to receive light irradiated from a light source; anda reflective pattern having a quadrilateral shape when viewed in a direction perpendicular to the reflective surface, and having a concave portion recessed toward an inner portion of the reflective surface and an embossed portion protruding from an edge of the concave portion toward an outer portion of the reflective surface,wherein the concave portion includes a first inclined surface inclined from the reflective surface toward the light output surface; and a second inclined surface inclined from the first inclined surface toward the reflective surface.2. The light guide plate of claim 1 , wherein claim 1 , in the concave portion claim 1 , an inclined angle of one of the first inclined surface and the second ...

LIGHT GUIDE PLATE, AND BACKLIGHT UNIT AND DISPLAY DEVICE INCLUDING THE SAME

Provided are a light guide plate, and a backlight unit and a display device including the same. The light guide plate includes a body including a light output surface configured to output light, a reflective surface provided opposite the light output surface, and side surfaces provided between the light output surface and the reflective surface; and a plurality of dot pattern formed on a surface of the reflective surface, and the dot pattern includes a central embossed portion protruding to the outside of the reflective surface, a concave portion having a ring shape which surrounds the central embossed portion and recessed and formed in the reflective surface, and an outer embossed portion formed on an outer circumference surface of the concave portion and configured to protrude to the outside of the reflective surface. 1. A light guide plate comprising:a body including a light output surface configured to output light, a reflective surface provided opposite the light output surface, and side surfaces provided between the light output surface and the reflective surface; anda plurality of dot patterns formed on a surface of the reflective surface,wherein each of the dot patterns includes a central embossed portion protruding to the outside of the reflective surface, a concave portion having a ring shape which surrounds the central embossed portion and recessed and formed in the reflective surface, and an outer embossed portion formed on an outer circumference surface of the concave portion and configured to protrude to the outside of the reflective surface.2. The light guide plate of claim 1 , wherein the outer embossed portion is formed in a ring shape along the outer circumference surface of the concave portion.3. The light guide plate of claim 1 , wherein in the outer embossed portion claim 1 , a height of a region close to a first side surface of the side surfaces is the greatest.4. The light guide plate of claim 3 , wherein in the outer embossed portion claim 3 ...

Backlight module and display device using same

A backlight module includes a light guide plate and a number of light sources. The light guide plate includes a first surface and a number of projecting portions extending from the first surface corresponding to the light sources. Each projection portion includes a second surface facing a light source. A number of microstructures are formed on the second surface for increasing the divergence angle of the light incident to the light guide plate through the second surface.

LIGHT GUIDE PLATE AND BACKLIGHT MODULE

A light guide plate and a backlight module are provided, the light guide plate has a wedge-shaped light incident portion and a conducting portion; the wedge-shaped light incident portion includes a light incident surface and a first light guide surface; the first light guide surface is disposed on an upper side of the light incident surface, having a scattering surface for scattering the incident light and a conducting surface for directional transmission of the incident light, the scattering surface is disposed on a bright light source area, and the conducting surface is disposed on a dark light source area. 1. A light guide plate , comprising:a wedge-shaped light incident portion, for homogenizing an incident light; anda conducting portion, for transmitting the homogenized incident light to a corresponding liquid crystal display panel; a light incident surface, for receiving the incident light; and', 'a first light guide surface disposed on an upper side of the light incident surface, including a scattering surface for scattering the incident light and a conducting surface for directional transmission of the incident light, the scattering surface being disposed on a bright light source area of the light guide plate, and the conducting surface being disposed on a dark light source area of the light guide plate, wherein the bright light source area is an area of the light guide plate corresponding to a (light emitted diode) LED light source, the dark light source area is an area of the light guide plate corresponding to a space between two adjacent LED light sources;, 'wherein the wedge-shaped light incident portion compriseswherein the light incident surface is a polished surface, a surface of the scattering surface is a polished surface, a surface of the conducting surface is provided with a first light-conducting microstructure.2. A light guide plate , comprising:a wedge-shaped light incident portion, for homogenizing an incident light; anda conducting portion, ...

Light emitting device comprising a film-based lightguide and reduced cladding layer at the input surface

A light emitting device disclosed herein includes at least one light source and an array of coupling lightguide strips continuous with a lightguide region of a lightguide formed from a film, light extraction features, a cladding layer in the light emitting region of the film, and a light input surface defined by the stacked bounding edges of the coupling lightguide strips, wherein an area percentage of the light input surface comprising a core region is at least 98 percent. In another embodiment, the light from the at least one light source is not directly coupled into the cladding layer at the light input surface. In a further embodiment, a total thickness of the coupling lightguide strips at the light input surface is less than (n) times a thickness of the lightguide region of the lightguide where (n) is the number of coupling lightguide strips. 1. A light emitting device comprising: each coupling lightguide strip terminates in a bounding edge; and', 'each coupling lightguide strip is folded in a fold region such that the bounding edges are stacked, the stacked bounding edges defining a light input surface;, 'a lightguide formed from a film having a core region and opposing faces with a thickness not greater than about 0.5 millimeters therebetween, the lightguide having an array of coupling lightguide strips continuous with a lightguide region of the lightguide, whereinat least one light source positioned to emit light into the light input surface, the light propagating within the coupling lightguide strips to the lightguide region of the lightguide, with light from each coupling lightguide strip totally internally reflecting within the lightguide region;a plurality of light extraction features that frustrate totally internally reflected light within the lightguide region such that the light exits the lightguide region in a light emitting region of the film; andthe lightguide further comprising a cladding layer comprising a solid cladding material optically ...

LIGHT-EMITTING MODULE

A light-emitting module includes a light-emitting element unit including a light-emitting element, a light-transmissive member covering a main light-emitting surface of the light-emitting element, and a first light-reflective member covering lateral surfaces of the light-emitting element; a light-transmissive light-guiding plate having a first main surface and a second main surface having a recess accommodating the light-emitting element unit; a second light-reflective member covering the second main surface and the light-emitting element unit; and a light-transmissive bonding member disposed in contact with inner lateral surfaces of the recess and outer lateral surfaces of the light-emitting element unit. At least a portion of the first light-reflective member is located outside the recess in a cross-sectional view, and is in contact with the light-transmissive bonding member. The light-transmissive bonding member has an inclined surface forming an acute angle with a corresponding outer lateral surface of the first light-reflective member. 1. A light-emitting module comprising: a light-emitting element having a main light-emitting surface and lateral surfaces,', 'a light-transmissive member covering the main light-emitting surface of the light-emitting element, and', 'a first light-reflective member covering the lateral surfaces of the light-emitting element;, 'a light-emitting element unit having outer lateral surfaces, the light-emitting element unit comprising a first main surface serving as a light-emitting surface, and', 'a second main surface opposite to the first main surface and forming a recess accommodating the light-emitting element unit, the recess having inner lateral surfaces and a bottom surface;, 'a light-transmissive light-guiding plate havinga second light-reflective member covering the second main surface of the light-transmissive light-guiding plate and the light-emitting element unit; anda light-transmissive bonding member disposed in contact ...

Apparatus for a Near-Eye Display

An apparatus for providing gaze tracking in a near-eye display. Certain examples provide an apparatus including a light modulator configured to receive light of a first range of wavelengths and generate an image beam therefrom. The light modulator is further configured to receive light of a second range of wavelengths and generate a probe beam therefrom. The apparatus also includes one or more light guides including one or more in-coupling element areas, and one or more out-coupling element areas. The one or more in-coupling element areas are configured to receive and in-couple the image beam and the probe beam into the one or more light guides. The one or more out-coupling element areas are configured to out-couple, from the one or more light guides: the image beam to a user's eye for user viewing, and the probe beam to the user's eye for detection of reflection therefrom.

BACKLIGHT MODULE AND DISPLAY APPARATUS

The present invention provides a backlight module and a display apparatus. The display apparatus comprises the backlight module and a display panel. The backlight module comprises a light collector, optical fibers, a fiber light-outputting substrate and a light guide plate. The optical fibers are connected between the light collector and the fiber light-outputting substrate. The light guide plate is disposed at one side of the fiber light-outputting substrate. The light guide plate includes light diffusion recessions, and the light diffusion recessions face the light-outputting openings of the fiber light-outputting substrate. The present invention can use ambient light rays to form a backlight source. 1. A backlight module , comprising:a light collector configured to collect ambient light rays;a plurality of optical fibers connected to the light collector;a fiber light-outputting substrate connected to the optical fibers, wherein the fiber light-outputting substrate includes a plurality of light-outputting openings configured to output the light rays transmitted by the optical fibers; anda light guide plate disposed at one side of the fiber light-outputting substrate, wherein the light guide plate includes a plurality of light diffusion recessions, and the light diffusion recessions face the light-outputting openings of the fiber light-outputting substrate, and each of the light diffusion recessions has a first opening length and a second opening length, and the first opening length is larger than the second opening length, and the first opening length is parallel to a longitudinal direction of the light diffusion recessions, and parallel to a longitudinal direction of a light input side surface of the light guide plate, and the second opening length is vertical to the first opening length.2. The backlight module according to claim 1 , wherein a profile of the light diffusion recessions is arc-shaped claim 1 , triangular or polygonal.3. The backlight module ...

Electronic paper display

The disclosure provides an electronic paper display. The electronic paper display includes an electronic paper panel. A light guide plate is disposed on the electronic paper panel. The light guide plate has a first surface and a second surface opposite to the first surface. A conductive pattern structural layer is disposed on the light guide plate. A light source is disposed on a side of the light guide plate. The first surface of the light guide plate is a patterned surface. A light generated by the light source is reflected or scattered to the electronic paper panel by the patterned surface.