СПОСОБЫ ДЛЯ ДИСПЛЕЯ С ДВОЙНОЙ МОДУЛЯЦИЕЙ С ПРЕОБРАЗОВАНИЕМ СВЕТА

Изобретение относится к средствам отображения с двойной модуляцией с преобразованием света. Техническим результатом является обеспечение средства отображения с широкой цветовой гаммой и высокой яркостью, обладающего повышенной производительностью дисплея и уменьшенным тепловыделением. Результат достигается тем, что источники света излучают первый свет на светопреобразующий слой. Светопреобразующий слой преобразует первый свет во второй свет. Светопреобразующий слой содержит квантовые точки. Логический блок выполняет одно или несколько имитационных моделирований светового поля для цветового сдвига в зависимости от функции рассеяния точки подсветки. Контроллер может регулировать значения возбуждения для одного или нескольких модуляторов света в зависимости от имитационного моделирования светового поля. 2 н. и 1 з.п. ф-лы, 5 ил.

СИСТЕМА СД-ПОДСВЕТКИ И УСТРОЙСТВО ОТОБРАЖЕНИЯ

Настоящее изобретение раскрывает систему СД-подсветки и устройство отображения. Система СД-подсветки включает модуль ЖК-дисплея и схему управления СД-подсветкой. Модуль ЖК-дисплея включает цепочки светодиодов. Схема управления СД-подсветкой включает модуль тока, блок сравнения, блок управляющего переключателя и блок сопротивления, причем на вход блока сравнения поступает напряжение с отрицательного вывода цепочки светодиодов, и когда напряжение на отрицательном выводе больше чем заданное пороговое напряжение, блок сравнения переводит блок управляющего переключателя в положение "Включено", при этом блок сопротивления подсоединяется параллельно модулю тока, чтобы снизить напряжение на отрицательном выводе. Технический результат заключается в снижении мерцания системы подсветки за счет снижения нестабильности замкнутой цепи. 3 н. и 17 з.п. ф-лы. 3 ил.

ЖИДКОКРИСТАЛЛИЧЕСКИЙ ДИСПЛЕЙ И ЖИДКОКРИСТАЛЛИЧЕСКОЕ УСТРОЙСТВО ОТОБРАЖЕНИЯ

Изобретение относится к жидкокристаллическому дисплею, а также к жидкокристаллическому устройству отображения. Заявленный жидкокристаллический дисплей содержит: жидкокристаллический дисплейный компонент, включающий жидкокристаллическую дисплейную панель; блок источника света, который содержит источник света и расположен сзади жидкокристаллического дисплейного компонента; первая схема для управления жидкокристаллическим дисплейным компонентом и/или вторая схема для управления блоком источника света расположены в области, границу которой определяют (i) плоскость передней поверхности жидкокристаллического дисплейного компонента и (ii) плоскость задней поверхности блока источника света. Причем блок источника света обеспечивает заднюю подсветку жидкокристаллической дисплейной панели, а передняя поверхность жидкокристаллического дисплейного компонента параллельна вертикальной плоскости. При этом первая схема и/или вторая схема расположены в области, находящейся под блоком источника света, таким ...

УСТРОЙСТВО ОТОБРАЖЕНИЯ ИЗОБРАЖЕНИЙ

Изобретение относится к устройству отображения изображений, снабженному задней подсветкой, такому как жидкокристаллическое устройство отображения. Техническим результатом является уменьшение мерцания на экране в результате изменения яркости задней подсветки в течение одного периода вертикальной развертки. Результат достигается тем, что схема 13 оценки характеристик изображения анализирует данные входного изображения и получает первые данные яркости, указывающие яркость задней подсветки в течение одного периода вертикальной развертки, и данные характеристик изображения, соответствующие первым данным яркости. Схема 14 преобразования данных изображения выполняет преобразование в данные входного изображения в соответствии с данными характеристик изображения и выводит данные изображения после преобразования на жидкокристаллическую панель 11. Схема 17 вычисления яркости период за периодом на основе первых данных яркости получает вторые данные яркости, указывающие яркость задней подсветки 12 в ...

УСТРОЙСТВО ОСВЕЩЕНИЯ, УСТРОЙСТВО ОТОБРАЖЕНИЯ И ТЕЛЕВИЗИОННЫЙ ПРИЕМНИК

... 1. Устройство освещения, содержащее:ряд газоразрядных трубок, которые расположены параллельно друг другу; иисточник питания, выполненный с возможностью подавать мощность возбуждения, чтобы возбуждать газоразрядные трубки параллельно, причем:мощность возбуждения подается на газоразрядные трубки так, чтобы мощность возбуждения, подаваемая на одну оконечную сторону и другую оконечную сторону каждой из газоразрядных трубок, находилась противофазах; иконденсатор соединяется с одной оконечной стороной газоразрядных трубок между источником питания и каждой из газоразрядных трубок, и упомянутый конденсатор размещается между упомянутым источником питания и каждой из газоразрядных трубок для обеспечения, чтобы текущая величина мощности возбуждения, подаваемой на каждую из газоразрядных трубок, была постоянной.2. Устройство освещения по п.1, в котором источник питания включает в себя трансформатор, который выдает мощность возбуждения в противофазах.3. Устройство освещения по п.1, в котором источник ...

Rastersequentielles Anzeigesystem mit einer von der Rückseite beleuchtbaren Anordnung von Flüssigkristallbildelementen und Verfahren zur Bilderzeugung

Anzeige mit ausgerichteter optischer Verschlußzelle und Hintergrundlichtzelle, welche bei einem Touchscreen anwendbar ist

Eine Vorrichtung (200) mit ausgerichteter optischer Verschlusszelle und Hintergrundlichtzelle (239, 289) verwendet ein gemustertes Polymer-dispergiertes optisches Flüssigkristallverschlussmaterial (230) ("polymer-dispersed liquid crystal" (PDLC)) und ein elektrolumineszierendes ("electroluminescent" (EL)) Hintergrundlichtmaterial (280), um eine kostengünstige Anzeige mit geringem Stromfluss zur Verfügung zu stellen, welche einen guten Kontrast sowohl bei hellen als auch bei dunklen Bedingungen aufweist. Die ausgerichteten, gemusterten optischen Verschluss- und Hintergrundlichtschichten bilden Pixel-"Fenster" durch welche auf einem Hintergrund gedruckte Bilder verborgen oder gezeigt werden können. Insbesondere trägt eine Maskenschicht (250) die Bilder, wobei sie zwischen der optischen Verschlussschicht und der Hintergrundlichtschicht angeordnet ist, um Informationsbilder zu zeigen, inaktive Bereiche der Anzeige abzudecken und die Elektrodenspuren zu verdecken, welche aktive Segmente der ...

Flüssigkristallanzeigevorrichtung

Power conservation for mobile device displays

Apparatus for an aircraft cockpit display

Overvoltage protection circuit, LED backlight drive circuit and liquid crystal display

Backlight for a liquid crystal display

PROBLEM TO BE SOLVED: To uniformly execute irradiation with light over the entire part of a liquid crystal panel and to reduce the electric power consumption. SOLUTION: This back light assembly includes plural cold cathode fluorescent tubes 31 which have lengths corresponding to the liquid crystal panel 20 and are laminated in parallel and a pair of supporting plats 32, 33 which are coupled to the ends of these cold cathode fluorescent tubes 31 and support the fluorescent tubes 31. The cold cathode fluorescent tubes 31 are successively flickered and images are continuously formed on a screen. Purple light corresponding to a wavelength of 380 to 420nm is released in order to excite the phosphors of a fluorescent layer 25. As a result, the effect of the surface light emission over the entire part of the fluorescent layer 25 is obtd. with low electric power consumption. In addition, the liquid crystal panel 20 is subjected uniformly with irradiation of the light over the entire part.

Portable computer apparatus

Portable electronic apparatus

Driving unit of fluorescent lamp and method for driving the same

Control unit with illuminated display

A display panel for an electronic device, has a base unit and a cover screen on which a plurality of display symbols, such as play or pause symbols, are arranged, in use, to be visibly illuminated. Each display symbol is associated with a light emission chamber 132 formed in the base unit. Each light emission chamber is closed at the sides and base and has an associated light source such as LED 128 arranged to emit light therein. Each light emission chamber has an aperture 136 arranged such that an associated display symbol is, in use, indirectly illuminated by said light source through the aperture. A control unit may also be provided with graspable cylindrical bezel (112, figure 4) arranged around a display panel (106, figure 3) such that the cylindrical bezel is rotatable about an axis of rotation with respect to the display panel and base mount section.

Portable electronic apparatus

A portable electronic apparatus comprising display means including a screen (2) and configured to be simultaneously responsive to display control signals from a plurality of electronic modules (6,7,8) so that the screen (2) is shared by said modules. Thus, the modules are separately responsible for data/signal processing functions and the display means is provided so that the different data/signal processing functions of the modules can share the display. These modules may be readily disconnectable from bays in the portable apparatus; plug-in modules may include circuits for providing digital mobile telephone function (6), a clock function (7), and a circuit (8) having a microprocessor and a ROM storing application programs (i.e. diary or wordprocessor). The portable electronic apparatus may also comprise a memory means, audio transducers (speaker (3) and microphone (4)) and a pointing means (which may take the form of a touch sensitive surface coextensive with the screen).

Control unit with illuminated display

Backlight module control circuit of multi-lamp display device

Consecutive illuminating backlight assembly for LCD employing fluorescent layer

Portable computer apparatus

A method of synchronizing the optical scan and electrical addressing of a ingle-panel, color lcd system

液晶显示器的闪烁式等离子背光系统

... 一种应用于液晶显示器的闪烁式等离子背光系统，包括一第一基板；约略与第一基板平行设置且分离的第二基板；在第一基板与第二基板之间所形成的气体放电空间；设置在第二基板朝向于第一基板的内面的至少一电极对，其中所述电极对具有约略彼此平行的第一电极以及第二电极；耦接于所述电极对的控制单元，用以周期性提供能量以激发位于第一基板与第二基板之间的气体放电；设置在第二基板朝向于第一基板的内面且覆盖所述电极对的介电层；以及设置在第一基板朝向于第二基板的内面的第一荧光层。 ...

Liquid crystal display device and its driving method, television receiver, liquid crystal display program, computer readable recording medium with liquid crystal display program recorded therein, and

A driving method for a liquid crystal display device is applicable to an active matrix type liquid crystal display device provided with a plurality of source lines; a plurality of gate lines intersecting the source lines; and a plurality of pixel forming units, wherein the pixel forming units are disposed at matrix-like intersecting points corresponding to the intersecting points of the source lines and the gate lines, respectively, and take voltages of the source lines as pixel values at the intersecting points through which the source lines pass when their corresponding gate lines are selected. In the driving method, a non-image signal is applied to the source line at every horizontal scanning period, the gate line is selected during an effective scanning period, and, thereafter from time when the gate line is not selected until before the next effective scanning period, a scanning signal line is selected in consistence with application timing of the non-image signal to the source line ...

LED BACKLIGHT DRIVING CIRCUIT, LIQUID CRYSTAL DISPLAY DEVICE, AND METHOD OF DRIVING A DRIVING CIRCUIT

Image display device

Backlight dimming method and a liquid crystal display using said method

High frame rate motion compensated color sequencing system and method

Display device and its driving method

Luminous Element Array Drive Circuit, Current Division Circuit And Method Thereof

Display device and method of driving the same

A display device and a method of driving the same are provided according to one or more embodiments. According to an embodiment, the display device includes a display panel including a plurality of display blocks arranged in the form of a matrix; a plurality of lighting blocks emitting light to the display panel, each of the lighting blocks arranged so as to correspond to at least one row of the matrix and having adjustable light luminance; and a signal control unit adapted to receive an image signal, determine display block luminance of the respective display blocks when an image is displayed on the respective display blocks in accordance with the image signal, determine the light luminance of the respective lighting blocks by using the display block luminance of some display blocks corresponding to the respective lighting blocks, correct the image signal by using the light luminance and the display block luminance, and provide the corrected image signal to the display panel.

Visual display for aircraft cockpit instrument display, has small number of large LCD screens with two independent display areas to reduce chance of failure of one set of screens

L'invention concerne un dispositif de visualisation à architecture électronique sécurisée pour applications aéronautiques. Chaque dispositif comporte un calculateur électronique et un dispositif d'affichage associé de type matriciel. L'invention s'applique essentiellement aux systèmes de visualisation comportant un faible nombre d'écrans de grande dimension. L'invention propose de structurer le dispositif d'affichage en deux zones d'affichage indépendantes et le calculateur en deux sous-ensembles électroniques également indépendants de telle sorte que la panne d'un des éléments n'entraîne, au plus, que la panne d'une seule zone du dispositif d'affichage. L'invention s'applique essentiellement aux dispositifs d'affichage à matrices actives à cristaux liquides comportant un éclairage à tubes fluorescents. Deux modes de réalisation des zones d'affichage sont décrits. Dans le premier mode, seule une partie de la surface de l'écran est perdue en cas de panne. Dans le second mode, la résolution ...

LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD OF THE SAME

LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF CONTROLLING THE SAME

Liquid crystal display device and driving method thereof

다채널 ＬＥＤ의 정전류 제어 장치와 이를 이용한 액정표시장치

... 본 발명은 다채널 LED의 정전류 제어 장치와 이를 이용한 액정표시장치에 관한 것으로, 그 다채널 LED의 정전류 제어 장치는 각각 LED 어레이, 트랜지스터, 및 가변 에미터 저항을 포함하는 다수의 LED 채널들; 상기 LED 채널들 각각에서 상기 트랜지스터의 컬렉터 전압을 센싱하는 피드백 센싱부; 및 상기 피드백 센싱부로부터 입력된 피드백 센싱 결과에 응답하여 상기 트랜지스터의 컬렉터 전압이 다른 LED 채널에 비하여 높은 LED 채널의 가변 에미터 저항을 높이는 제어부를 포함한다.

3차원 디스플레이 장치의 백라이트 유닛 제어 방법 및 백라이트 유닛의 분할 제어가 가능한 3차원 디스플레이 장치

... 3차원 디스플레이 장치가 3차원 비디오 시퀀스를 수신하고, 3차원 디스플레이 장치의 백라이트 유닛의 복수 개의 서브 블록들이 빛을 조사하는 3차원 디스플레이 장치의 LCD부의 부분 영역별로, LCD부에 표시되는 상기 3차원 비디오 시퀀스의 영상 밝기를 결정하고, LCD부의 부분 영역별 영상 밝기에 기초하여 백라이트 유닛의 서브 블록들의 점등 지속 시간을 결정하며, 3차원 비디오 시퀀스의 한 세트의 좌시점 프레임 및 우시점 프레임의 전환 주기에 동기화하여, 백라이트 유닛의 서브 블록들의 점등 주기를 결정하는 3차원 디스플레이 장치의 백라이트 유닛 제어 방법이 개시된다.

BACKLIGHT CONTROL CIRCUIT, A BACKLIGHT DEVICE AND A LIQUID DISPLAY DEVICE USING THE SAME CAPABLE OF REDUCING THE NUMBER OF EXTERNAL WIRINGS

PURPOSE: A backlight control circuit, a backlight device and a liquid display device using the same capable of reducing the number of external wirings are provided to reduce the number of circuit composing elements and the number of external wires connected to the back light control units. CONSTITUTION: A shift register(51) stores digital video data. A division circuit(101) produces the serial transmission clock signal as the first clock signal. A counter/decoder(102) does the count value counting the pulse number of the first clock signal. A data register stores loaded digital video data in the shift register. © KIPO 2009 ...

스위치 구동 장치, 발광 장치, 차량

... 스위치 구동 장치(10)는, 차량 탑재용 발광 장치에 포함되어 있는 복수의 발광 소자에 대하여 각각 병렬 접속되는 복수 채널의 스위치 소자 SW1 내지 SW8과, 장치로의 전원 투입을 받아 소정의 패턴으로 각 스위치 소자 SW1 내지 SW8의 온/오프 상태를 순차 전환해 가도록 일련의 스위치 구동 시퀀스를 자동으로 개시하는 로직부(120)를 갖는다.

WIDE COLOR GAMUT DISPLAY, AND APPARATUS AND METHOD FOR DISPLAYING IMAGES AT A VIEWING AREA

LIGHT EMITTING DEVICE INCLUDING LIGHT EMITTING LAYER AND GRATING FOR ALIGNMENT OF MOLECULES OF LIGHT EMITTING LAYER

PURPOSE: A light emitting device is provided to eliminate the need of using a rear polarizer by permitting the light emitting device to be used as a back light and illuminating a transmitting LC display. CONSTITUTION: A light emitting device comprises a substrate(13), a light emitting layer(15) disposed on the substrate, and a grating(17) for alignment of molecules of the light emitting layer. The light emitting device emits at least partially plane-polarized light, as a result of alignment of the light emitting layer by the grating structure. The grating structure reduces waveguide effects of the device, to thereby increase an optical output of the device. © KIPO 2005 ...

LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME

LIQUID CRYSTAL DISPLAY HAVING A NON-VIDEO SIGNAL INSERTING UNIT AND A METHOD FOR DRIVING THE SAME

PURPOSE: An LCD(Liquid Crystal Display) and a method for driving the LCD are provided to improve the contrast and brightness of a displayed image in an OCB(Optically Compensated Bend) mode LCD, by turning on a light source during a first period and turning off the light source during a second period. CONSTITUTION: An LCD comprises an LCD panel(3) having a plurality of pixels, a light source for illuminating the LCD panel, and a controller for controlling the LCD panel and the light source. The controller includes a non-video signal insertion unit and a driving unit(7). The non-video signal insertion unit makes the pixels store a first voltage corresponding to video signal during a first period of one frame and store a second voltage corresponding to non-video signal during a second period next to the first period. The driving unit turns on the light source during a period corresponding to the first period, and turns off the light source during a period corresponding to the second period ...

BACK LIGHT UNIT FOR DIVIDING LIGHT SOURCE AND RESPECTIVELY DRIVING DIVIDED REGIONS AND DISPLAY DEVICE HAVING THE SAME

PURPOSE: A back light unit and a display device including the back light unit are provided to divide a light source into a plurality of regions and independently drive the plurality of regions with a simple configuration. CONSTITUTION: A back light unit includes a light source(440), a light source driver group(430), and a light source controller. The light source is divided into a plurality of split regions(445) that are independently operated. The light source driver group supplies power to the light source and includes multiple drivers connected to at least two split regions of the light source. The light source controller controls the light source driver group to selectively supply power to the split regions connected to the multiple drivers. The light source includes a light-emitting diode. The plurality of split regions are arranged in parallel. The light source controller controls the light source driver group to provide power to the split regions sequentially and repeatedly. © KIPO ...

DISPLAY DEVICE CAPABLE OF REDUCING THE WIDTH OF A PRINTED CIRCUIT BOARD

PURPOSE: A display device is provided to make the number of switching devices smaller than the number of light source blocks, thereby reducing the number of the components of a backlight device. CONSTITUTION: A backlight device generates light. A display panel receives light to display an image. The backlight device includes an operating circuit(110) and p light source blocks(LB1~LB9). The operating circuit outputs an operating voltage. A light source block receives an operating voltage through a first terminal, receives a reference voltage through a second terminal, and generates light. The operating circuit comprises a first switching unit(130) and a second switching unit(140). The first switching unit applies an operating voltage to the first terminal of light source blocks. The second switching unit applies a reference voltage to the second terminal of the light source blocks. COPYRIGHT KIPO 2012 ...

LIQUID CRYSTAL DISPLAY DEVICE AND A SCANNING BACKLIGHT DRIVING METHOD THEREOF CAPABLE OF APPLYING A SCANNING BACKLIGHT DRIVING TECHNOLOGY WHILE MINIMIZING FLICKER RECOGNITION

PURPOSE: A liquid crystal display device and a scanning backlight driving method thereof are provided to efficiently prevent degradation of screen brightness by stretching data of an input image in order to compensate sudden change of brightness. CONSTITUTION: An LCD panel(10) displays modulation data according to a frame frequency. A backlight light source generates light which is irradiated to the LCD panel. A scanning backlight controlling unit(14) calculates light duty of a PWM signal. A light source driver(15) synchronizes the frequency of the PWM signal to the frame frequency. COPYRIGHT KIPO 2012 ...

ELECTRONIC APPARATUS

device of illumination, device of exhibition and receiver of television

Scanning driving apparatus for backlight source and the liquid crystal display thereof

A scanning driving apparatus for backlight source and the liquid crystal display thereof are provided. The aforementioned scanning driving apparatus includes a DC/AC inverter, N transformers, N switches, and a control circuit, wherein N is a natural number. The DC/AC inverter has a first output terminal and a second output terminal, and the two output terminals are used to output an AC voltage. Each of the transformers has a primary winding, and each of the switches electrically connects the first output terminal and second output terminal through one of the primary windings. Besides, the control circuit controls the switches to be temporarily and periodically turned off/on by a predetermined sequence.

Liquid crystal display device

A first transistor, a second transistor, a third transistor, a fourth transistor are provided. In the first transistor, a first terminal is electrically connected to a first wiring; a second terminal is electrically connected to a gate terminal of the second transistor; a gate terminal is electrically connected to a fifth wiring. In the second transistor, a first terminal is electrically connected to a third wiring; a second terminal is electrically connected to a sixth wiring. In the third transistor, a first terminal is electrically connected to a second wiring; a second terminal is electrically connected to the gate terminal of the second transistor; a gate terminal is electrically connected to a fourth wiring. In the fourth transistor, a first terminal is electrically connected to the second wiring; a second terminal is electrically connected to the sixth wiring; a gate terminal is connected to the fourth wiring.

Dimming control apparatus and dimming control method

ILLUMINATION DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE

An illumination device has a plurality of LED modules and a driving unit. The LED modules have: a metal base substrate formed in a planar shape; an organic substrate; a plurality of LEDs arranged on the organic substrate; a metal member provided so as to correspond to each of the LEDs, conduct heat from the LED, be electrically connected via a switch element from one of the electrodes of the LEDs, go through the organic substrate along the width direction thereof from the LED mounting surface of the organic substrate, and be exposed from the opposite surface of the organic substrate; LED control signal terminals provided to the edge side of the organic substrate; and voltage feed terminals provided to the edge side of the organic substrate. The LED modules are arranged along the row direction and the column direction so as to be capable of attaching to and detaching from the metal base substrate, the LED control signal terminals and the power feed terminals that are adjacent to each other ...

LIUID CRYSTAL DISPLAY DEVICE AND ITS DRIVING METHOD

It is an object to provide a liquid crystal display device that always displays an image and at the same time that can prevent burning-in due to a long time display of the same image. In the liquid crystal display device provided with groups of pixel defining units disposed in a matrix-like structure and a back light controllable to turn on or off for each region corresponding to the prescribed number of scanning lines, each frame period of an input video signal is divided into first and second sub-frame periods, a liquid crystal panel is provided with a data signal based on the input video signal in response to the selection of the scanning lines for the first sub-frame period, and the liquid crystal panel is provided with a data signal based on refreshing data to prevent the burning-in of the image for the first sub-frame period. In each region, a unit of the back light turns on or off. When a data signal based on an input signal is supplied to the groups of the pixel defining units on ...

LIGHT SOURCE DEVICE FOR IMAGE DISPLAY DEVICE

A light source device (10) for a flat image display device having an image displaying means (12) which is high in accuracy and durability and capable of moving the light emission position of a light source rapidly corresponding to the position movement of an observer without using any mechanical configuration. The light source device (10) comprises an LED array (11) with white LEDs (1) or RGB LEDs arrayed therein, and an LED control means (13) for controlling the lighting of the white LEDs of the LED array.

LIQUID CRYSTAL DISPLAY

In a predetermined period (one frame or one subframe), a backlight is lighted between the middle point in time in first data writing scanning and the middle point in time in second data writing scanning for each lighting region provided by dividing the backlight into four regions. When the time required for data writing scanning is set equal to 50% of the predetermined period, the ratio (panel on rate) of the time when a liquid crystal panel is in transmitting state to the time the backlight is lighted is as high as 93.8%. The ratio of luminance gradient (luminance in the center of display area/luminance at the end of display area) is as low as 1.14. When the backlight is lighted while being divided into ten regions, the panel on rate can be increased as high as 97.5% and the luminance gradient can be decreased as low as 1.05.

LED STRING DRIVER WITH NON-DISSIPATIVE REACTANCE BALANCER

A solid state lighting arrangement constituted of: a power source providing a current which is discontinuous in at least one direction; a plurality of light emitting diode (LED) strings arranged to receive the provided current from the power source; and a plurality of reactance elements, each of the plurality of reactance elements arranged in series with a particular one of the plurality of LED strings, such that current flowing from the power source through each of the LED strings creates a voltage drop across the series arranged reactance element, wherein the voltage drop across each of the series arranged reactance elements responsive to the discontinuous current is at least 10 times greater than the maximum difference between the voltage drops among the plurality of LED strings.

METHOD AND ARRANGEMENT FOR THE IMAGING REPRESENTATION OF INFORMATION, PARTICULARLY FOR USE WITH COMMUNICATION TERMINALS

The invention relates to a method and to an arrangement for the imaging representation of information, particularly for use with communication terminals. The arrangement comprises an image output device having at least one first partial region and at least one second partial region, wherein the first partial region is designed such that the representation of the information is optimized for high-quality imaging and the second partial region is designed such that it is optimized for lower-quality imaging. According to the method, the first partial region is activated when data is present for output using high-quality imaging, while the second partial region is always actively operated.

LIQUID CRYSTAL DISPLAY APPARATUS

In an LCD apparatus (400) having simplified structure and improved luminance, a light supplying unit (100) supplies an LCD panel (280) with red light during a time corresponding to one-third of a frame, green light during the time and blue light during the time. A light reflective-transmissive unit is disposed between the light supplying unit (100) and the LCD panel assembly (200) to transmit the red light, the green light and the blue light and to reflect an external light from exterior of the LCD panel assembly (200). The LCD apparatus displays an image by means of white light as well as red light, green light and blue light, thereby improving luminance and simplifying structure.

Techniques for dual modulation display with light conversion

Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light into second light. The light conversion layer can include quantum dots or phosphor materials. Modulation drive signals are generated to determine transmission of the second light through individual subpixels of the display. These modulation drive signals can be adjusted based on one or more light field simulations. The light field simulations can include: (i) a color shift for a pixel based on a point spread function of the illumination sources; (ii) binning difference of individual illumination sources; (iii) temperature dependence of display components on performance; or (iv) combinations thereof.

Backlight driving device, backlight driving method, and liquid crystal display device

A backlight driving device for controlling driving of a backlight device for display, the backlight device generating predetermined white light by mixing light from a plurality of light emitting diodes of three or more colors, the backlight driving device including: storing device for storing an initial amount of current and a predetermined multiplication coefficient for each color; light quantity detecting device for detecting a light quantity for each color; and controlling device for adjusting an amount of current passed through the light emitting diodes of each color by feedback control on a basis of a detection output from the light quantity detecting device with an amount of current obtained by multiplying the initial amount of current by the predetermined multiplication coefficient as an initial value, whereby the predetermined white light is generated; wherein when a difference between the amount of current after the feedback control and the initial amount of current exceeds a predetermined ...

Liquid crystal display and driving method used for same

A liquid crystal display is provided which is capable of improving a quality of a displayed image made up of a moving image and a static image in a mixed manner. By arranging backlights and by dividing one frame of a video input signal into four frame blocks and by getting a moving image detecting circuit to judge whether an image for each of the frame blocks is a moving image or a static image and having a lighting timing duty control section get the backlight corresponding to an image for the frame block having been judged to be a moving image to flash and also get the backlight corresponding to an image for the frame block having been judged to be a static image to be turned ON all the time, occurrence in an image retention phenomenon or a blur of an edge is reduced when a moving image is to be displayed and occurrence of a flicker is eliminated when a static image is to be displayed, which enables improvements in a quality of a displayed image.

Display device and image forming apparatus with same

In addition to a normal waiting mode of displaying in a whole screen of a liquid-crystal panel and a first power-saving mode of eliminating the displaying in a whole screen of the liquid-crystal panel, a second power-saving mode of displaying at a part of the liquid-crystal panel is provided. In the normal waiting mode, a controller controls the backlight to turn on a light illuminating a whole area and also controls a touch panel to be turned on. In the first power-saving mode, the controller turns off the light and also turns of the touch panel. In the second power saving mode, the controller controls the display section to display a summarized content of settings at the part of the liquid crystal panel, controls the backlight to turn on the light illuminating the part of the liquid crystal panel and turns off the touch panel.

Image display device and method of displaying image

It is an object of the invention to provide an image display device for improving the image quality of moving images and still images displayed on a liquid crystal display device while controlling increase in power consumption. A liquid crystal panel for performing input image display and black image display at an arbitrary black display time ratio in one frame period, a movement detection unit for detecting a movement of the input image and outputting movement information, a display ratio control unit for fixing the black display time ratio based on the movement information, and a display brightness control unit for controlling brightness of the liquid crystal panel for one frame period to be substantially constant irrespective of the black display period are provided. The movement detection unit detects whether the input image is a moving image or a still image, and the display ratio control unit sets at least one transient black display time ratio between the black display time ratios ...

LIQUID CRYSTAL DISPLAY DEVICE, BACKLIGHT USED FOR SAME DISPLAY DEVICE, METHOD FOR DRIVING SAME BACKLIGHT AND METHOD FOR MANUFACTURING SAME BACKLIGHT

A Liquid Crystal Display (LCD), a backlight used for the LCD and a method for producing the LCD and the backlight are provided which are capable of inhibiting an increase in component counts and in assembling processes and of reducing them, thereby achieving low costs. A display image is obtained by arranging a backlight section being able to perform scanning as a single unit in a manner that it positionally matches a liquid crystal displaying section. The backlight section is provided with a plurality of scanning electrodes and light emitting layers each providing a different luminescent color, and being spatially separated from each other on a principal face of the backlight and scanning is performed on a plurality of light emitting layers providing a different luminescent color.

DISPLAY APPARATUS AND CONTROLLING METHOD THEREOF

A display apparatus and a method of controlling the display apparatus are provided. The display apparatus includes a display unit configured to include a display panel configured to be curved at a curvature occurring within a preset range and a controller configured to control the display unit to compensate for an image quality of each area of the display panel based on the curvature of the display panel. Therefore, a user uses a display apparatus capable of controlling a curvature effect.

Adaptive adjustment of light output of solid state lighting panels

A lighting panel system includes a lighting panel including a first string of solid state lighting devices configured to emit light at a first wavelength and a second string of solid state lighting devices configured to emit light at a second wavelength, different from the first wavelength, and a current supply circuit configured to supply a drive current to the first string in response to a control signal. A photosensor is arranged to receive light emitted by the panel, and a control system is configured to sample an output signal of the photosensor and adjust the control signal responsive thereto to thereby adjust an average current supplied to the first string by the current supply circuit. Methods of operating a lighting panel are also provided.

Multi-processor system and operations to drive display and lighting functions of a software configurable luminaire

The examples relate to various implementations of a software configurable lighting device having a multi-processor system including a central processing unit and a parallel processing unit. The software configurable lighting device utilizes the multi-processor system to efficiently transform and/or modify control data. The software configurable lighting device also includes a transparent image display device and a general illumination device. Transformed and/or modified control data is utilized to drive the transparent image display device and the general illumination device in combination.

LIGHT EMITTING DEVICE FOR IMAGE DISPLAY, DISPLAY DEVICE AND TELEVISION RECEIVER

A light emitting device for image display includes an LED current setting circuit and an LED voltage setting circuit. In at least one embodiment, the LED current setting circuit generates a current control signal to vary an element current flowing in the LED element depending on an image display mode. The LED voltage setting circuit generates a voltage control signal to vary driving voltage driving the LED element depending on the image display mode. The light emitting device further includes a voltage generation circuit that generates the driving voltage according to the voltage control signal and the driving voltage to the LED element.

Liquid crystal display device

To provide a field-sequential liquid crystal display device capable of reducing color shading. The field-sequential liquid crystal display device includes a liquid crystal display panel, a driving circuit driving the liquid crystal display panel and a backlight irradiating plural colors of light including a first color and a second color sequentially, in which a video voltage of one color of the plural colors is written in respective pixels of plural pixels in each field of the one frame period, and light of the one color of the plural colors is emitted from the backlight to display images on the liquid crystal display panel, and when the drive circuit writes a video voltage of the second color next to the video voltage of the first color in a pixel electrode of a first pixel, finish timing of light emission of a light source of the backlight irradiating light of the first color in an area where the first pixel exists is later than start timing of writing the video voltage of the second ...

DISPLAY SYSTEM WITH LIGHT BARS ALONG THE EDGES OF THE DISPLAY

A display system includes a first display, a first light bar, and an electronic device. The first display displays a first image. The first light bar includes a plurality of light units disposed along part of a first edge of the first display. The electronic device includes an image capturing unit and a control unit. The image capturing unit captures an image of the first display and the first light bar whenever a light unit of the first light bar is turned on. The control unit identifies at least a first light unit and a last light unit of the first light bar along the first edge of the first display, and generates relative positions of the first light unit and the last light unit according to images captured by the image capturing unit and positions of edges of the first display.

Driving circuit for light emitting element, light emitting device using same, and display apparatus

LED terminals are respectively provided to light emitting units, and are each connected to the second terminal of the corresponding one of the light emitting units. Current sources are respectively provided to the LED terminals, and are respectively configured to supply adjustable driving currents to the respective light emitting units via the respective LED terminals. A reference voltage source generates a reference voltage that corresponds to the driving current. A control circuit controls a DC/DC converter such that the lowest voltage from among voltages at the LED terminals matches the reference voltage.

Phase shift controller

A positive counter starts counting, starting with an initial value, upon receiving a positive edge of a dimming pulse signal. A negative edge counter starts counting, starting with an initial value, upon receiving a negative edge of the dimming pulse signal. For each i-th (2@i@n) channel, the phase shift amount is calculated by multiplying a period count value that indicates the period of the dimming pulse signal by (i-1)/n. When the count value matches the phase shift amount, a burst control signal is switched to a first level. When the count value matches the phase shift amount, the burst control signal is switched to a second level.

Electronic circuits for driving series connected light emitting diode strings

Electronic circuits provide an error signal to control a regulated output voltage signal generated by a controllable DC-DC converter for driving one or more series connected strings of light emitting diodes.

Image display apparatus and method for operating the same

A controller for a display device includes a formatter and a processor. The formatter generates a predetermined arrangement of left and right image data included in a three-dimensional (3D) video signal. The processor controls operation of one or more backlight lamps of a display device based on the predetermined arrangement of left and right image data and a detected temperature.

Method of displaying three-dimensional stereoscopic image and a display apparatus for performing the same

A method of displaying a three-dimensional (3D) stereoscopic image includes providing a first 3D data signal to a first display area portion of a display panel; and selectively providing a second 3D data signal or a black data signal to a second display area portion of the display panel when the first 3D data signal is being provided to the first display area.

Image display device

The image display device includes a liquid crystal panel which has at least one optical sensor for outputting an electric signal resulting from light irradiation, pixel electrodes for driving a liquid crystal, switching elements for switching the pixel electrodes and a single transparent substrate on which the at least one optical sensor, the pixel electrodes and the switching elements are formed by laminating thin films.

LIQUID CRYSTAL DISPLAY DEVICE AND DISPLAY CONTROL METHOD

A liquid crystal display device includes a display panel having liquid crystal pixels, and a backlight which illuminates the display panel. In particular, this liquid crystal display device further includes a light source driving unit which turns on and off the backlight at a predetermined duty ratio every frame period for update of a video signal, and a panel driving unit which allows each of the liquid crystal pixels to hold a variable pixel voltage that depends on the video signal for a gradation display period longer than a turn-on period of the backlight and which allows each of the liquid crystal pixels to hold a fixed pixel voltage that does not depend on this video signal for a non-gradation display period shorter than a turn-off period of the backlight.

SCANNING BACKLIGHT FOR LCD

A method for displaying images on a display having backlight is disclosed, where the images is updated periodically with a period. The method comprises the steps of: generating a signal with a pulse pattern for each period depending on the contents of an image to be displayed in that period; and activating backlight in accordance with the signal. Further, a display (100) comprising a display panel (102) and a backlight unit, wherein the backlight unit comprises a controller (104) and a lighting device is disclosed. The controller (104) is arranged to generate a control signal, and the lighting device is arranged to provide backlight to the display panel (102) according to the control signal, wherein the control signal comprises a pulse pattern depending on contents of displayed images.

Method of displaying image and display apparatus for performing the same

A method of displaying image provides data of a left eye image frame to a display panel during a first period, and provides data of a black image frame during a second period that is shorter than the first period. The method also provides data of a right eye image frame during the first period, and provides the data of the black image frame during the second period. A frame period during which the black image frame is displayed in a stereoscopic image mode is thus decreased, and a frame period in which the left eye image frame or right eye image frame is displayed is increased, allowing for increased charging time and improved image quality.

Apparatus and method for television backlignting

A television backlighting apparatus includes an HDMI splitter for splitting a single input HDMI signal into two like output HDMI signals. A video frame analyzer is communicative with one of the HDMI outputs and has a processor executing an instruction set for analyzing the HDMI signal. The analysis converts boundary video values of the HDMI signal to an LED illumination data signal and an LED light source output. An LED light source is attachable to a television and is communicative with the video frame analyzer via the LED light source output. The light source includes at least one LED light and an LED interface cable interconnected with the video frame analyzer and extending from the LED light source output to the at least one LED light.

Display backlight brightness adjustment

In some examples, a display includes a plurality of display backlight groups, and one or more controller to determine one or more one-dimensional backlight group brightness level adjustments, to determine one or more two-dimensional backlight group brightness level adjustments, and to adjust a brightness of one or more of the backlight groups in response to content of a display image.

DISPLAY RESCAN

A method and apparatus for updating pixel elements of a display device. The display device comprises a pixel array including a plurality of pixel elements and one or more light sources to illuminate the pixel array at a first instance of time. A data driver is configured to receive a frame of display data corresponding to an image to be displayed on the pixel array at a first instance of time. The data driver scans each row of the pixel array, during a pixel adjustment period prior to the first instance of time, to drive a plurality of first voltages onto the plurality of pixel elements, respectively, based on the received frame. The data driver further rescans a subset of rows of the pixel array, during the pixel adjustment period, to drive second voltages onto respective pixel elements in the subset of rows based on the received frame.

LIGHTING DEVICE AND DISPLAY APPARATUS

A lighting device includes multiple light sources and a light guide plate that guides light from the multiple light sources. The light guide plate has a light incident face where light from the light sources is incident and an incident-opposite face positioned opposite to the light incident face, and also includes a first light guide portion where a distance L from the light incident face to the incident-opposite face is relatively long and a second light guide portion where the distance is relatively short. The multiple light sources include a first light source that supplies light to the first light guide portion, and a second light source that supplies light to the second light guide portion. The lighting device is configured such that a light emission quantity per unit time at the second light source is smaller than a light emission quantity per unit time at the first light source.

APPARATUS FOR DRIVING MULTI-LIGHT EMITTING DEVICES

An apparatus for driving multi-light emitting devices that drives a multi-channel light emitting unit having a plurality of light emitting channels connected in parallel with each other, each of which has a plurality of light emitting devices connected in series with each other according to an aspect of the invention may include: a DC/DC converter generating a driving voltage; a current control unit having a plurality of current sources connected between cathodes of the plurality of light emitting channels and a ground; a minimum voltage selection unit detecting a minimum detection voltage among the plurality of detected voltages at the cathodes of the plurality of light emitting channels; a first error detection unit detecting an error voltage determined by the difference between the minimum detection voltage and a predetermined first reference voltage; and a feedback coupling unit supplying the input voltage according to the error voltage and the driving voltage.

DISPLAY DEVICE WITH SWITCHABLE VIEWING ANGLES

A display device with switchable viewing angle includes a display panel, a backlight source, a timing controller, a source driver chip and an LED driver module. The backlight source includes a plurality of LEDs. The timing controller is connected to the source driver chip. The source driver chip is connected to the plurality of data lines. The LED driver module is connected to the plurality of LEDs. The display panel has a narrow viewing angle mode and a wide viewing angle mode. In the narrow viewing angle mode, the luminous brightness of the plurality of LEDs is adjusted to gradually decrease from the middle to both sides of the display panel. In the wide viewing angle mode, the luminous brightness of the plurality of LED is adjusted to gradually increase from the middle to both sides of the display panel.

FIELD SEQUENTIAL DISPLAY WITH OVERLAPPED MULTI-SCAN DRIVING AND METHOD THEREOF

A field sequential display method with overlapped multi-scan driving applied in a Field Sequential Display and device thereof includes turning on LEDs of one color in each of a plurality of blocks of a backlight module sequentially, and writing the image data of the color into pixels of the block when the LEDs of the color of the block are turned on; writing a voltage of a black frame into the pixels of the block after the image data of the color is written into the pixels of the block; and turning off the LEDs of one color of the block after the voltage of the black frame is written into the pixels of the block. By doing so, the response time of a crystal of a pixel can be increased, and uneven color distribution in the upper and lower portions of the frame can be reduced.

THREE-DIMENSIONAL DISPLAY MODULE

A three-dimensional display module includes a substrate, a display layer, a first electrode layer, a liquid-crystal layer, a second electrode layer, and a drive unit. The substrate has first electrodes and second electrodes. The display layer is disposed on the substrate and includes light-emitting elements. The first electrode layer is disposed on the display layer. The liquid-crystal layer is disposed on the display layer. The second electrode layer is disposed on the liquid-crystal layer. The drive unit drives the first electrodes and the first electrode layer to supply power to the light-emitting elements, such that the light-emitting elements generate light passing through the liquid-crystal layer to form a display image. The drive unit drives the second electrodes and the second electrode layer to produce an electric field on the liquid-crystal layer to change focal length of the liquid-crystal layer so as to control depth of field of the display image.

Display device, multi-display device including the same, and method for driving the same

A display device is provided. The display device includes a display panel, a backlight unit, and a luminance comparison unit. The backlight unit is configured to supply light to the display panel. The luminance comparison unit is configured to compare a measured luminance of the display panel with a reference luminance range. The backlight unit includes a light source unit, a DC-DC converter, and a driving current controller. The DC-DC converter is configured to supply a driving voltage to the light source unit, and the driving current controller is configured to control a driving current flowing to the light source unit based on the comparison result of the luminance comparison unit.

DISPLAY PANELS AND MULTIVISION APPARATUSES

A multivision apparatus may include a display panel that includes a display screen including a first region and an adjacent second region. The first region may include first pixels, and the second region may include second pixels. The first pixels and the second pixels have different structures. The display panel may display a single image across the first region and the second region of the display screen. The multivision apparatus may include an array of interconnected display panels configured to collectively display an image, based on each given display panel displaying a separate sub-image in the first and second regions of the given display panel.

Backlight driving method and module for a scan-type display

A backlight driving method includes steps of: (A) generating an original synchronization control (SC) signal, and a serial input signal that contains multiple predetermined delay values; (B) generating multiple internal SC signals based on the original SC signal and the delay values, such that respective time delays of the internal SC signals with respect to the original SC signal are respectively dependent on the delay values; and (C) generating multiple backlight driving outputs based on the internal SC signals to respectively drive multiple backlight sources, such that the backlight sources emit light in an order dependent on the delay values.

BACKLIGHT UNIT, CONTROL METHOD THEREOF, AND LIQUID CRYSTAL DISPLAY DEVICE

A backlight unit, a control method thereof, and a liquid crystal display device are provided. The control method includes following steps: obtaining backlight data corresponding to each of the partitions, the backlight data including multiple bits of data; dividing a frame of a lighting process of each light-emitting unit of the partitions into a plurality of sub-fields having different durations, wherein each of the sub-fields corresponds to one of the bits of data; and outputting the sub-fields having different durations corresponding to each of the partitions in a preset order.

Handheld electronic communication device having an age compensating display

A method and handheld electronic device for compensating for differential aging of display screen on a handheld electronic device wherein in a first position a first portion of the display screen (220) is hidden from view while a second portion of the display screen (222) is viewable, and in a second position the first portion and the second portion of the display screen are viewable. Over time, relative illumination durations of the first and second portions are tracked and based on the relative illumination durations, a relative degree of illumination of one or both of the first portion and the second portion are adjusted when the display screen is in the second position to compensate for differential aging between the first and second portion.

Backlit display device with reduced flickering and blur

A backlit display with improved display characteristics is provided in which the light sources comprise LEDs arranged in rows and columns. A data processing unit provides a signal to a light driver to select the appropriate light source corresponding to a displayed pixel and drives the light source with a power level to produce an appropriate level of illumination, the light source of each region of the display being independent of those of other regions. For each region, motion detection (308) is performed in order to determine it is a motion block or a still block. A screen is then generated (310) based on a motion map, and a screen function may be changed (312) to determine which backlight to illuminate and the level of illumination.

Portable electronic device and illumination controlling method thereof

A portable display device includes a display (111) formed with electronic paper, an illuminating unit (120), and a controller (180). The electronic paper displays data in response to applied electrical current, and maintains displaying of the data in an absence of the applied electrical current. The illuminating unit selectively illuminates each particular region of a plurality of regions of the display and includes a plurality of light sources which are individually associated with one or more of the plurality of regions of the display. The controller activates the illuminating unit, selectively activating a first group of the plurality of light sources to illuminate a particular region of the display responsive to user contact, and the first group includes at least one of the plurality of light sources.

DISPLAY DEVICE HAVING A PLURALITY OF PIXELS AND METHOD FOR DISPLAYING IMAGES

LIQUID CRYSTAL DISPLAY DEVICE

SYSTEMS AND METHODS FOR CALIBRATING SOLID STATE LIGHTING PANELS

DRIVING METHOD OF LIQUID CRYSTAL DISPLAY DEVICE AND ITS LIGHT SOURCE

PROBLEM TO BE SOLVED: To provide a liquid crystal display device in which animation visibility can be improved, and lighting control of a wide range can be stably performed with a low current without generating unnecessary pulses. SOLUTION: A PWM generating section 32 for black insertion lighting control outputs a black insertion PWM pulse VBL for driving a fluorescent lamp 43 such that a black insertion period for extinguishing the fluorescent lamp 43 and a period for lighting the fluorescent lamp 43 are provided in one vertical period, a PWM generating section 31 for luminance lighting control outputs a lighting control PWM pulse Vpwm 1 for PWM driving the fluorescent lamp 43 so as to repeat lighting and extinguishing in the lighting period, an AND circuit 33 outputs an inverter drive signal Vout 1 where the lighting control PWM pulse Vpwm 1 and the black insertion PWM pulse VBL are superposed, and an inverter 42 drives the fluorescent lamp 43 by applying a voltage corresponding to the ...

IMAGE DISPLAY

PROBLEM TO BE SOLVED: To provide an image display which is inexpensive though being thin and has high contrast and low power consumption. SOLUTION: The image display includes a plurality of light source units 2 disposed apart from each other, LED driving circuits 31, and a liquid crystal panel. Each light source unit 2 includes a light guide 21 and an LED 22, and the light guide 21 includes a light scattering part. Driving circuits 31 individually adjust luminous fluxes emitted from respective light source units 2 by controlling the light source units 2 in accordance with an image displayed on the liquid crystal panel, to change screen brightness of the liquid crystal panel. COPYRIGHT: (C)2010,JPO&INPIT ...

Methods of driving colour sequential displays

A method of driving a display uses first ( 4 ) and second ( 5 ) illumination cycles of the display. In each cycle, a first set of pixels ( 1′ ) is illuminated with a first color (R, G) and a second set of pixels ( 2′ ) is illuminated with a second color (G, B). The first and second colors of the two cycles together include at least three colors (R, G, B) for forming an image. This method provides a sequential drive scheme, in that at least two cycles are used with different color properties. However, each cycle uses at least two different colors, so that each cycle is not a single color across the whole display area. In this way, the color sequence is alternated spatially as well as temporally.

Image display device and method as well as program

Three-dimensional processing is applied to more than one images taken from different points of view to generate a stereoscopic image, and the stereoscopic image is stereoscopically displayed. An instruction to control a stereoscopic effect of the stereoscopically displayed stereoscopic image is received, and the three-dimensional processing is applied to the more than one images to achieve a stereoscopic effect according to the instruction. Then, control values of the stereoscopic effect according to the instruction are recorded in a recording unit with the control values being associated with the more than one images. At this time, if there are the control values of the stereoscopic effect recorded in the recording unit, difference values between the control values of the stereoscopic effect according to the instruction and the recorded control values of the stereoscopic effect are recorded in the recording unit.

Dual-view display device and display method thereof

A dual-view display device and a display method thereof are disclosed. The dual-view display device includes a backlight module, an optical film, a liquid crystal display panel, and a main control unit. The backlight module includes a light guide plate, a left light source, and a right light source. The optical film is disposed in front of the backlight module. The liquid crystal display panel is disposed in front of the optical film. The main control unit is electrically coupled to the left light source, the right light source, and the liquid crystal display panel. The main control unit transmits an image data to the liquid crystal display panel and controls the left and right light sources according to the image data, so as to control the liquid crystal display panel adaptively to display an identical image, one view image, or dual-view images.

Display apparatus and method for driving display applying the same

A display apparatus and a method for driving display thereof are provided. The display apparatus drives an upper backlight unit and a lower backlight unit so that a first time period during which both the upper backlight unit and the lower backlight unit are simultaneously turned on exceeds half of a second time period during which the upper backlight unit is turned on. Accordingly, the display apparatus may increase a time period during which both the upper backlight unit and the lower backlight unit are simultaneously turned on.

Dynamic LED Driving Current Compensation for Cross-Panel Backlight Illumination Uniformity

A dynamic light emitting diode (LED) driving current compensation method is provided for ensuring cross-panel backlight illumination uniformity in a display device. A backlight panel includes a plurality of waveguide pipes and a front panel with a plurality of pixel rows. Each row overlies a corresponding waveguide pipe and includes a plurality of selectively enabled pixels formed in a sequence along the row. Light is supplied from a plurality of LEDs, where each LED supplies light to a corresponding waveguide pipe. For each front panel row, a pixel is selected for enablement and an LED drive current is selected in response to the enabled pixel. The LED drive current is selected in response to the distance between the waveguide pipe position underlying an enabled pixel in a corresponding front panel row and the first light interface.

Image display apparatus and information processing apparatus

In one embodiment, an image display apparatus is disclosed. The apparatus includes a liquid crystal panel, a backlight, a calculation unit, a reference unit, a multiplier unit, and a determination unit. The backlight includes light sources illuminating the liquid crystal panel unit. The calculation unit calculates a representative value of relative luminances of pixels in the each of small regions into which the display region is divided. The reference unit refers to prestored lighting pattern data items for the light sources. The multiplier unit multiplies, for each of the small regions, the referred lighting pattern data item by the representative value. The determination unit determines emission intensities of respective light sources based on multiplication results of the multiplier unit.

Backlight device and liquid crystal display device

According to an embodiment, a backlight device includes a plurality of light guide plates, a plurality of light sources and a light-source substrate. The light guide plates overlap each other with a same light output direction; each of the light guide plates includes a plurality of stripe-shaped projections aligned on a light output face and a light output pattern. Each of the light sources emits light incident into any one of the light guide plates and propagating in an extending direction of the stripe-shaped projections. The light-source substrate includes a plurality of interconnections, a turning-on signal is selectively supplied via the interconnections to at least one of light source groups, and each of the light source groups includes at least one of the light sources. At least one part of a light emission face, including the light output faces, emits light output from the light source group receiving the turning-on signal.

Backlight apparatus and liquid crystal display apparatus

A backlight apparatus is provided that enables a balance of brightness to be maintained over the entire area of a display screen and long life to be achieved. The surface of substrate 130 is opposite the rear surface of liquid crystal panel 110 . LEDs 140 are placed on the surface of substrate 130 . LED drive circuits 150 supply LEDs 140 with a current that causes LEDs 140 to emit light that illuminates liquid crystal panel 110 . LED drive circuits 150 supply a lower current to LEDs 140 placed in an area having a higher ambient temperature within the surface area of substrate 130.

Liquid Crystal Display Apparatus

A display apparatus and method having a pair of substrates, a display area which has a plurality of pixels, a lighting device which includes a plurality of light sources, a scanning driver which outputs scanning signals to the plurality of pixels, and an image driver which outputs image signals to the plurality of pixels. The lighting device illuminates the display area, the image signals are inputted to the plurality of pixels respectively, and each of the plurality of pixels controls a transmittance of an incident light from the lighting device after the image signals are inputted to the plurality of pixels respectively. The lighting device lights the plurality of light sources corresponding to the image signals inputted to the plurality of pixels after each of the plurality of pixels controls the transmittance.

Backlight device, image display apparatus comprising same, and driving method

A backlight device according to the present invention includes a lamination of two light guide layers, namely, a first light guide layer ( 1 ) and a second light guide layer ( 3 ). The first light guide layer ( 1 ) includes a plurality of first light guide sections ( 1 a ) arrayed in a vertical direction. The second light guide layer ( 3 ) includes a plurality of second light guide sections ( 3 a ) arrayed in a horizontal direction. The first light guide sections ( 1 a ) are provided correspondingly with first light sources ( 2 ) and the second light guide sections ( 3 a ) are provided correspondingly with second light source ( 4 ). These light sources are independently controlled.

Liquid crystal display device and method for controlling display of liquid crystal display device

An embodiment of a liquid crystal display device includes: a liquid crystal panel including pixels arranged in a pixel; and a backlight that irradiates it with light. In at least one example embodiment, the pixels included in the liquid crystal panel each include picture elements different in color. The picture elements are each provided with a color filter corresponding to the color of the picture element. The liquid crystal display device includes: an aperture ratio converting section that, to reduce optical cross talk, decreases an aperture ratio for inputted image data and outputs data of the aperture ratio; and a backlight data converting section that, to supplement the aperture ratio for the image data which is decreased by the aperture ratio converting section, converts data to increase a backlight luminance. This backlight luminance control prevents or reduces optical or electrical cross talk.

Method for Displaying Stereoscopic Image and Display Apparatus for Performing the Same

A method of displaying a stereoscopic image includes outputting a left-eye image to a first and a second display block of a display panel during an N-th frame. Light is provided to the first display block during a first period of the N-th frame and light is provided to the second display block during a second period of the N-th frame. A right-eye image is output to the first and second display blocks of the display panel during an M-th frame. Light is provided to the first display block during a first period of the M-th frame and light is provided light to the second display block during a second period of the M-th frame.

Display apparatus and method of driving the same

A display apparatus includes a display panel including nxm array of pixels and which sequentially drives the pixels from pixels in a first row to pixels in an n-th row, a panel driving circuit which sequentially applies first, second, third or fourth image data to the display panel, a backlight unit including a first light source disposed adjacent to the pixels in the first row and a second light source disposed adjacent to the pixels in the n-th row, and a backlight control circuit which divides each of first and second time periods into first, second, third and fourth blinking time periods, and applies a control signal to the backlight unit, where the first time period corresponds to two frames during which the first and second image data are applied, and the second time period corresponds to two frames during which the third and fourth image data are applied.

Driver device, backlight unit and image display device

A backlight unit according to the present invention includes a plurality of LED drivers ( 5 a ) to ( 5 i ), an LED controller ( 61 ) that generates a control information group in which lighting control information for selected LED drivers is arranged and a cascade line that connects the LED drivers in cascade. The LED controller ( 61 ) enables the selected LED drivers ( 5 ), and feeds the control information group to the cascade line, and the enabled LED drivers ( 5 ) perform an operation (acquisition operation) of acquiring the lighting control information on itself among the control information group whereas the LED drivers ( 5 ) that are not enabled do not perform the acquisition operation. According to the present invention, it is possible to reduce the performance of unnecessary operations of the backlight unit. The present invention can be utilized in a liquid crystal display device that uses LEDs as a light source of backlight.

Liquid crystal display and scanning backlight driving method thereof

A liquid crystal display includes a liquid crystal display panel displaying modulated data based on a frame frequency, light sources generating light to be irradiated into the liquid crystal display panel, a scanning backlight controller calculating a turn-on duty ratio of a pulse width modulation (PWM) signal for controlling turn-on and turn-off operations of the light sources, and a light source driver. The light source driver synchronizes a frequency of the PWM signal with the frame frequency or with a frequency, that is faster than two times the frame frequency, based on the result of a comparison between the turn-on duty ratio of the PWM signal and a previously determined critical value, and then sequentially drives the light sources along a data scanning direction of the liquid crystal display panel.

Regulation of gamma characteristic in a display

System(s) and method(s) are provided for regulation of gamma characteristic of a display having solid-state-based backlight illumination. Regulation of the gamma characteristic can be accomplished at least in part through synchronization of data writing to a set of pixels in a display within a video frame with backlight illumination of a region of the display during a predetermined period, wherein the region is spanned by the set of pixels. Collection of data indicative of illumination intensity of light to be emitted in a region of a backlight source of the display during the predetermined period enables determination of at least one gamma value and at least one gamma reference voltage related to the at least one gamma value. Application of the at least one gamma reference voltage to the set of pixels adjusts the gamma characteristic thereof within the video frame.

Display control apparatus and control method thereof

A display control apparatus includes a display control unit configured to display a predetermined object image on a display unit, and a light emission control unit configured to independently control light emission of a plurality of light emitting units corresponding to a plurality of division areas prepared by dividing the display unit, wherein, when a display area of the object image on the display unit is changed, the light emission control unit controls a plurality of division light emitting units other than the plurality of division light emitting units corresponding to the display area of the object image to emit light at a similar luminance to the luminance of the plurality of division light emitting units corresponding to the display area of the object image.

Method of controlling backlight device and display apparatus using the same

In a display apparatus, a display panel is divided into dimming areas and a backlight device includes light source blocks providing light to the dimming areas. Average gray-scale values and maximum gray-scale values respectively corresponding to the dimming areas are generated based on image signals provided to the dimming areas. Whether the average gray-scale values and the maximum gray-scale values are respectively within first and second reference ranges are checked. One of at least two parameters is selected according to a checked result, and representative brightness values respectively corresponding to the dimming areas are determined using the selected parameter. Duty ratios of the light source blocks are controlled based on the representative brightness values. As a result, power consumption is reduced when applying a dimming device to the display apparatus.

Driving method of liquid crystal display device

Input of image signals to part of a plurality of pixels included in a particular region of a pixel portion and supply of light to part of another plurality of pixels which is different from the part are performed concurrently. Therefore, it is not necessary to provide a period in which light is supplied to all of the plurality of pixels included in the region after the image signals are input thereto. In other words, it is possible to start input of the next image signals to all of the plurality of pixels included in the region just after the image signals are input thereto. Accordingly, it is possible to increase the input frequency of the image signals. As a result, it is possible to suppress deteriorations of display caused in the field-sequential liquid crystal display device.

LED Backlight Controller

The line banding image artifact that results from the interaction of LCD ripple and LED flicker in an LCD device that utilizes LED backlighting strings is substantially reduced by selecting a number of LED strings, individually driving the number of LED strings with a corresponding number of identical clock signals that are equally phase delayed, and selecting the frequency of the clock signals so that the product of the frequency of the clock signal multiplied by the number of LED strings is equal to the line clock frequency.

Display device

A display device (liquid crystal display device 100 ) includes a display panel ( 10 ) (liquid crystal panel 10 ), light receiving sensors (first light receiving sensors 122 ), and an image changing section ( 250 ). A display region ( 10 a ) of the liquid crystal panel ( 10 ) has a plurality of pixels ( 30 ) located therein. The first light receiving sensors ( 122 ) receive external light directed to the liquid crystal panel ( 10 ), at a plurality of positions in the display region ( 10 a ). In the image changing section ( 250 ), a reference value is predefined for light receiving information (a 1 through d 1 ) obtained by the first light receiving sensors ( 122 ). When light receiving information (a 1 through d 1 ) exceeding the reference value is obtained by the first light receiving sensors ( 122 ), the image changing section ( 250 ) changes an image to be displayed on the display region ( 10 a ), based on the light receiving information (a 1 through d 1 ).

Stereoscopic Dual Modulator Display Device Using Full Color Anaglyph

Systems and methods are provided for displaying stereoscopic image data on a dual modulation display having a light source modulation layer and a display modulation layer. The light source modulation layer has light sources for providing spatially modulated, spectrally separated light for displaying time-multiplexed left and right eye images. The display modulation layer has pixels for spatially modulating the amount of light received from the light source modulation layer.

Rapid image rendering on dual-modulator displays

Apparatus and methods are provided that employ one or more of a variety of techniques for reducing the time required to display high resolution images on a high dynamic range display having a light source layer and a display layer. In one technique, the image resolution is reduced, an effective luminance pattern is determined for the reduced resolution image, and the resolution of the effective luminance pattern is then increased to the resolution of the display layer. In another technique, the light source layer's point spread function is decomposed into a plurality of components, and an effective luminance pattern is determined for each component. The effective luminance patterns are then combined to produce a total effective luminance pattern. Additional image display time reduction techniques are provided.

Liquid crystal display device and method for driving the same

A liquid crystal display device and a method for driving the same are disclosed. The liquid crystal display device includes a liquid crystal panel and a driving circuit. The driving circuit includes a timing controller, a detection unit, a level shift circuit, a gate driver unit, and at least one source driver unit. The timing controller receives a frame rate and provides at least one gate turn-on signal and a source data writing signal for each of at least two different frame rates. The detecting unit detects the frame rate. The timing controller adjusts a duty cycle of the source data writing signal, so that the charge time is maintained to be substantially constant for any one of the different frame rates. Accordingly, a problem of flickering phenomenon can be avoided.

High Dynamic Range Displays Using Filterless LCD(s) For Increasing Contrast And Resolution

A display provides increased contrast and resolution via first LCD panel energized to generate an image and a second LCD panel configured to increase contrast of the image. The second panel is an LCD panel without color filters and is configured to increase contrast by decreasing black levels of dark portions of images using polarization rotation and filtration. The second LCD panel may have higher resolution than the first LCD panel. A half wave plate and/or film is placed in between the first and the second panel. The panels may be directly illuminated or edge lit, and may be globally or locally dimmed lights that may also include individual control of color intensities for each image or frame displayed.

Multi-lamp driving system

A multi-lamp driving system includes a pulse width modulation (PWM) controller, transformers, a current difference detection circuit, a lighting detection circuit, a frequency scanning detection circuit, a frequency regulating circuit, and a duty cycle regulating circuit. The current difference detection circuit detects difference among current flowing through lamps to determine if the current fluctuates. The lighting detection circuit determines if the lamps are lit according to the current, and generates a lighting indication signal after the lamps are lit. The frequency scanning detection circuit determines if the multi-lamp driving system is in a frequency scanning process according to the lighting indication signal, and generates a frequency scanning indication signal if the multi-lamp driving system is in the frequency scanning process. The duty cycle regulating circuit regulates duty cycles of the PWM signals upon the condition that the current fluctuates and the multi-lamp driving system is in the frequency scanning process.

Image display device, control method therefor, and image display system

Included are a backlight having a plurality of light emitting blocks, a display panel, a calibration unit which carries out calibration of the display panel based on a result of measurement of the brightness and chromaticity of the display panel, a first measuring unit which measures individual temperatures of the plurality of light emitting blocks, a setting unit which sets a patch image display area in a region of the display panel corresponding to a light emitting block of which the magnitude of a change in temperature within a predetermined period of time is smaller than a threshold value, and a generation unit which generates a patch image to be displayed in the patch image display area, wherein the calibration unit carries out the calibration based on the result of measurement by the first measuring unit in cases where the patch image is displayed in the patch image display area.

Light source driver

A light emitting diode (LED) driver is provided that includes a light emitting diode, a converter connected to the light emitting diode, wherein the converter receives an input voltage and converts the input voltage to a basic voltage for driving the light emitting diode, a current regulator connected to the light emitting diode, a first operational amplifier connected to the current regulator, an analog dimming voltage generating unit including a second operational amplifier, a first resistor, a second resistor, and a third resistor, wherein a first terminal of the first resistor, a first terminal of the second resistor, and a first terminal of the third resistor are connected to a non-inversion terminal of the second operational amplifier, and connected to the first operational amplifier, and a pulse-width-modulation dimming pulse generating unit connected to a second terminal of the third resistor.

Display device and display method

A display device includes a liquid crystal panel with video display lines, a display controller operable to have display data rendered on the liquid crystal panel, the display data including first field data of a video signal input, and second field data of the video signal as field data subsequent in temporal order and different in content from the first field data, a backlight unit disposed behind the liquid crystal panel and provided with light sources adapted to emit light for irradiation to respective regions on the liquid crystal panel sectioned in accordance with a scan direction, and a backlight controller operable to have the light sources transitioned between a light-out state and a light emitting state with a transition time shorter than a scan time of first field data and a scan time of second field data by the display controller.

Method and apparatus for improved subpixel rendering

A display system with a subpixel renderer configured to subpixel render input image data having a first set of primary colors, the subpixel rendering performed according to an area resample filter, a color sharpening filter, and a metamer sharpening filter, so as to generate subpixel rendered output image data having a second set of primary colors.

Dimming device and image display device

Provided is a dimming device capable of emitting light from any area on a flat plane and which is minimized in crosstalk. The dimming device ( 1 ) according to the present invention includes: a light guiding plate ( 2 ); an LED ( 3 ) disposed on an edge of the light guiding plate ( 2 ); a switching section ( 4 ); a frame division section ( 5 ) that divides one frame period into a plurality of sub frame periods; a light source control section ( 6 ) that makes the LED ( 3 ) emit light every sub frame period; and a voltage application section ( 7 ). The switching section ( 4 ) includes scan electrodes ( 8 ) disposed in a direction parallel to a direction in which the LED ( 3 ) is disposed, a plurality of signal electrodes ( 10 ) disposed in a direction at right angles to the scan electrodes, and liquid crystal elements ( 9 ) with changeable light extraction rates from the light guiding plate ( 2 ). The voltage application section ( 7 ) selects a scan electrode out of the plurality of scan electrodes every sub frame period and applies a voltage thereto, and applies, to at least one of the plurality of signal electrodes, a voltage in accordance with a light extraction rate of the liquid crystal element ( 9 ). The present invention can be suitably used as a backlight of an image display device.

Multi-functional active matrix liquid crystal displays

A direct view display provides a light modulating panel and a backlight including first and second sets of spectral emitters. The first set of spectral emitters generate a first light bundle and the second set of spectral emitters generate a second light bundle. Several modes of operation may be provided including (1) an advanced 2D mode, (2) an enhanced color gamut mode employing simultaneous illumination of the first and second set of spectral emitters, (3) a privacy screen mode, (4) a channel multiplexed mode, and (5) a stereoscopic image mode. The latter three modes utilize the first and second set of spectral emitters to alternately illuminate a portion of the light modulating panel. Images and representations generated by the direct view display operating in the latter three modes are viewed using appropriate eyewear having filters with passband characteristics to transmit the respective light bundle.

Backlight module, display system, and driving method of backlight module

A backlight module adapted to a display device for displaying multiple image frames to form an image. Herein the backlight module includes multiple light-emitting units and a driving circuit. The light-emitting units are arranged along a first direction. The driving circuit is electrically coupled to the light-emitting units to thereby drive the light-emitting units sequentially to emit light. During the driving circuit drives the light-emitting units, a light-emitting time of the firstly-turned-on light-emitting unit in the light-emitting units for illuminating a current image frame of the image frames has a portion in an image driving time of the current image frame, and the other portion of the light-emitting time is in the image driving time of a successive image frame immediately following the current image frame. Moreover, the disclosure also provides a display system using the above backlight module and a driving method of backlight module.

Backlight scanning method and liquid crystal display

The disclosed technology discloses a backlight scanning method for controlling a backlight of a liquid crystal display panel, the backlight comprising light groups on left and right sides. The method comprises steps of: determining a time period for turning on and off the light groups on the left and right sides in accordance with a control signal for pixels in the liquid crystal display panel; and in scanning, turning on and off the light groups on the left and right sides alternately in sets, and during the course of scanning one frame, turning on or off the light groups on the left and right sides at least two times.

Light emitting device assembly, surface light source device, liquid crystal display device assembly, and light output member

A light emitting device assembly includes: a light emitting device; and a light output member provided on the light emitting element and having an upper surface on which a curved part that outputs light from the light emitting device is provided, wherein a value of a x coordinate of a curved part center axis is a positive value, a locus of an edge of a curved part forms a circle or oval around the curved part center axis, light on a Z-axis output from an origin is output from the curved part at an angle θ 0 (θ 0 >0) formed with the Z-axis within a XZ-plane, and function F(φ,Δφ) expressed by F (φ,Δφ)=(Δθ + −Δθ −   (1) monotonously increases, takes the maximum value at φ=φ 0 (<0), and then, monotonously decreases as a value of φ increases from the minimum value.

Led driver apparatus

A Light Emitting Diode (LED) driver apparatus and a method of driving an LED array are provided. A Light Emitting Diode (LED) driver apparatus includes: a DC-DC converter configured to supply a driving voltage to an LED array, a plurality of LED drivers configured to drive the LED array according to a dimming signal, in which the plurality of LED drivers are connected to one another in parallel to supply currents to the LED array.

Electronic device

An electronic device including a body and a light source module is provided. The body has a side on which an unstable display is disposed and another side on which a bi-stable display is disposed. The light source module is arranged inside the body and configured to provide a light source to one or none of the unstable display and the bi-stable display.

Display Device, Method for Driving Display Device, and Electronic Apparatus

A display device includes an illumination unit that delivers a first light, a second light and a third light. The display also includes a driving circuit that supplies a pixel with a first data signal for displaying a first image by illuminating the first light, the driving circuit supplying the pixel with a second data signal for displaying a second image by illuminating the second light, the driving circuit supplying the pixel with a third data signal for displaying a third image by illuminating the third light.

Image display device and image display method

When first and second region-processing sections ( 510, 520 ) calculate in parallel backlight luminances required for an input image halved by a regional image division section ( 505 ) included in an area-active drive processing section ( 5 ) of a liquid crystal display device, LED data (D b1 , D b2 ) are exchanged for each other, allowing reference to backlight luminances not calculated for one region but calculated for the other region. As a result, when an area is illuminated by surrounding backlight sources, the actual display luminance can be calculated correctly. Thus, pixel display can be provided with correct display tones across the entire screen, thereby preventing a reduction in display quality.

Color sequential liquid crystal display device

The color sequential LCD device comprises an LCD panel, a data drive circuit, a gate drive circuit and backlight units. The LCD panel comprises data lines disposed along a major-axis direction of a substrate of the LCD panel, gate lines orthogonally intersecting the data lines, and a plurality of color sequential displaying areas defined along the major-axis direction of the substrate. The data drive circuit disposed at one side of the substrate in the minor-axis direction applies image signals to the data lines. The gate drive circuit disposed at one side of the substrate in the major-axis direction applies strobe pulse to the gate lines. The backlight units disposed at one side of the substrate in the major-axis direction at least comprises red LEDs, green LEDs and blue LEDs. The invention improves the displaying effect due to increase the number of the color sequential displaying areas.

Display apparatus and method of driving the same

Disclosed are a display apparatus and a method of driving the same. An image signal receiver sequentially outputs frames for image display. A local illumination calculation unit displays an image on a display unit based on the frames and calculates light emission amount of a light source provided for each section of a backlight unit. A frame interpolator generates sub-frames based on the frames and outputs the sub-frames and the frames. A pixel adjuster adjusts light transmittance of each pixel according to the brightness of each pixel and the amount of the light emitted from each section which is calculated by the local illumination calculation unit when the image is displayed based on the frames and the sub-frames sequentially output from a frame interpolator. Local illumination is realized without increasing the number of memory devices while a frame frequency is increased.

Optical correction for high uniformity panel lights

A display has a spatial light modulator for dynamically controlling a luminance of each pixel according to an input signal, the spatial light modulator having a non-uniform spatial characteristic, the display also having an optical filter having a spatial pattern to alter the luminance to compensate at least partially for the non-uniform spatial characteristic. An electronic signal processing element applies some pre ompensation predominantly of higher spatial frequencies for the non-uniform spatial characteristic. Such dynamic and optical compensation can enable tuning for different optimizations or for compensating for variations over time. A backlight has an optical source and an optical filter, the source having a color output which has a non-uniform spatial characteristic, and the optical filter having a spatial pattern to alter the color to compensate in part at least for the non-uniform spatial characteristic.

Display Moving Image Quality Improvement In 3D Barrier Type Display

A method to display moving images is described. The method includes shuttering one or more display pixels in a plurality of display pixels. Shuttering blocks substantially all light emanating from the display pixel. The method also includes, while shuttered, refreshing the one or more display pixels and allowing the one or more display pixels to stabilize. Backlights for the shuttered display pixels may be turned off while shuttered. After the one or more display pixels have substantially stabilized, unshuttering the one or more display pixels is included in the method. Apparatus and computer readable media are also described.

Ambient Black Level

Techniques for operating a display system in a wide range of ambient light conditions are provided. An intensity of ambient light on a display panel may be detected. The display panel may be illuminated by light sources in addition to the ambient light. An individual light source may be individually settable to an individual light output level. If it is determined that the luminance level of the ambient light is above a minimum ambient luminance threshold, an ambient black level may be calculated using the intensity of ambient light. Light output levels of one or more of the light sources may be elevated to first light output levels. Here, the one or more light sources may be designated to illuminate one or more dark portions of an image. The first light output levels may create a new black level equaling the determined ambient black level.

Liquid crystal display panel and liquid crystal display device

The liquid crystal display panel includes a liquid crystal display unit, and a backlight unit illuminating the liquid crystal display unit. The backlight unit includes first and second white light-emitting diodes that respectively emit white light, and first and second drive units that respectively supply a current to the first and second white light-emitting diodes. The first and second drive units are respectively configured to be able to adjust supply current to the first and second white light-emitting diodes. Chromaticities of the first and second white light-emitting diodes are of a relationship of being positioned opposite each other across a blackbody locus on an xy chromaticity diagram. The first and second white light-emitting diodes change over time so that, on the xy chromaticity diagram, an intersection point of the blackbody locus and a line that passes through the chromaticities of the first and second white light-emitting diodes becomes constant.

Image output apparatus, control method therefor, image display apparatus, control method therefor, and storage medium

Disclosed is an image output apparatus that outputs a plurality of image data to one or a plurality of image display apparatuses capable of controlling amounts of light of backlights, the image output apparatus including: a determining unit configured to determine whether the plurality of image data satisfy a predetermined condition; and a controlling unit configured to control, when the determining unit determines that the plurality of image data satisfy the predetermined condition, the one or the plurality of image display apparatuses such that either or both of amounts of light and number of light emission control units of the backlights used for display of the plurality of image data are the same.

Display apparatus and control method thereof

A display apparatus comprises a determination unit and a control unit, wherein when a block corresponding to an object region is not included in a predetermined number of blocks centered around a determination-target block, the determination unit determines that the determination-target block is a block which satisfies a predetermined condition, and wherein the control unit: sets a backlight emission brightness of a block corresponding to the object region to a first level, sets a backlight emission brightness of a block which satisfies the predetermined condition, among the blocks corresponding to a background region, to a second level that is lower than the first level, and sets a backlight emission brightness of a block which does not satisfy the predetermined condition, among the blocks corresponding to the background region, to a third level that is higher than the second level and not higher than the first level.

Light emitting device, display device, light emitting component driver circuit, and method of driving light emitting component

A light emitting device includes light emitting component sets, a voltage measurement circuit, a voltage generator, and a drive controller. The voltage measurement circuit is configured to measure voltages at connecting points between light emitting component lines and drive switches. The voltage generator includes a plurality of smoothing capacitors for the light emitting component sets, respectively. The voltage generator is configured to generate a drive voltage applied to the light emitting component sets using one of the smoothing capacitors. The drive controller is configured to select the smoothing capacitor corresponding to the light emitting component set, the measured voltage of which is the lowest among the light emitting component sets on which lighting control is performed to alter the drive voltage according to alteration of the lighting control. The drive controller is configured to control the voltage generator to generate the drive voltage using the selected smoothing capacitor.

Display with red, green, and blue light sources

A display has a screen which incorporates a light modulator. The screen may be a front projection screen or a rear-projection screen. The screen is illuminated with light from a light source comprising an array of controllable light-emitters. The controllable-emitters and elements of the light modulator may be controlled to adjust the intensity of light emanating from corresponding areas on the screen. The display may provide a high dynamic range.

Light emitting device, display device and method of driving light emitting device

A light emitting device includes light emission units, a voltage generator, a lighting selector, and a drive control unit. Each light emission unit includes light emitting component groups each of which includes a light emitting component array and a drive switch. The light emitting component array includes light emitting components that are connected in series. The drive switch is connected in series to the light emitting component array to drive the light emitting component array. The lighting selector selects the light emitting component group that is to be lit on according to brightness intensity required for each light emission unit. The drive control unit controls each drive switch independently according to the selection by the lighting selector and controls to light on each light emitting component group independently and controls the voltage generator to generate a common drive voltage.

Redundant control system for lcd

In an exemplary embodiment, each horizontal and vertical conductor of a TFT array may be in electrical contact with a first and second control system. Initially, the entire display is driven by the first control system. When/if a failure occurs in the first control system, it is powered down and the second control system maintains operation of the entire display. Each control system may contain a set of source/gate drivers, display interface board, and power supply. A reversionary button may allow the user to manually switch between control systems. Alternatively, failure may be detected by the display interface boards or a graphics processor.

Method of providing additional information on each object within image by digital information display device, digital information display device for the same, and visible light communication terminal for receiving additional information

A method and apparatus for providing additional information to a visible light communication terminal through visible light communication by an information display device having a back light unit is provided. The method includes, when the visible light communication terminal is located in one area corresponding to at least one additional information providing area that is disposed within a screen of the information display device, receiving time slot information allocated to the one area through the visible light communication, when the visible light communication terminal is located in remaining areas of the at least one area corresponding to the at least one object, except for the one area, receiving additional information on all objects from the remaining areas through the visible light communication, and acquiring additional information on the object corresponding to the one area from among the additional information on all the objects by using the allocated time slot information.

Systems and methods for liquid crystal display column inversion using reordered image data

Systems, methods, and devices for performing column inversion using reordered image data are provided. In one example, an electronic display may include a display panel with columns of pixels and driver circuitry to drive the pixels using column inversion. The driver circuitry may drive pixels of a first superpixel in a first color order and drive pixels of an adjacent second superpixel in a second color order, such that more pixels are driven sequentially at a common polarity than would have been driven sequentially at the common polarity were the pixels of the first superpixel driven at the same color order as the pixels of the second superpixel.

Backlight compensation pattern

For estimating an illumination pattern generated by the plurality of light sources, a combination of contributions of the light sources is computed. The contribution of a light source comprises a combination of at least a first component, comprising a part of a reference profile aligned on a position of said light source, said part of the aligned reference profile extending within the illumination area, and a second component depending on a distance between the position of said light source and an edge of the illumination area.

Method of driving the backlight of a light-emitting region of an lcd device to reduce the influence of light leaked from neighboring light-emitting regions

There is provided a method of driving a backlight of a liquid crystal display device capable of eliminating leakage of light from adjacently-placed light emitting blocks. A gray level and maximum gray level of an input video signal are inputted for every light-emitting block. An output average gray level is calculated and a lighting control signal corresponding to converted luminance is outputted. The drivers responding to the lighting control signal makes LEDs (Light Emitting Diodes) emit light. An average gray level from an output from sensors is calculated. An average gray level, based on an average gray level and a light leakage rate, by taking light leakage into consideration. A gray level correcting signal is outputted in the light-emitting block based on the above output average gray level. An output average gray level is corrected in response to a gray level correcting signal.

Liquid crystal display device

It is an object to provide a liquid crystal display device which has excellent viewing angle characteristics and higher quality. The present invention has a pixel including a first switch, a second switch, a third switch, a first resistor, a second resistor, a first liquid crystal element, and a second liquid crystal element. A pixel electrode of the first liquid crystal element is electrically connected to a signal line through the first switch. The pixel electrode of the first liquid crystal element is electrically connected to a pixel electrode of the second liquid crystal element through the second switch and the first resistor. The pixel electrode of the second liquid crystal element is electrically connected to a Cs line through the third switch and the second resistor. A common electrode of the first liquid crystal element is electrically connected to a common electrode of the second liquid crystal element.

BACKLIGHT DRIVING CIRCUIT AND METHOD

A backlight driving circuit includes a scan driver operatively associated with pixel circuits in a matrix formation, and a backlight driver. The scan driver activates the pixel circuits in a row-by-row manner within a frame interval for provision of data voltages to the pixel circuits in each row of the matrix formation, respectively. The backlight driver adjusts a duty cycle of a backlight driving signal for a backlight source such that the backlight source is deactivated when at least one of the pixel circuits is yet to be activated within the frame interval, and adjusts the duty cycle to gradually increase brightness of light output from the backlight source when all of the pixel circuits have been activated within the frame interval. 1. A backlight driving circuit adapted for receiving a plurality of data voltages and adapted to be connected electrically to a backlight source and to a plurality of pixel circuits that are arranged in a matrix formation , said backlight driving circuit comprising:a scan driver configured to be operatively associated with the pixel circuits and configured to activate the pixel circuits in a row-by-row manner within a frame interval for provision of the data voltages to the pixel circuits in each row of the matrix formation, respectively; anda backlight driver configured to be operatively associated with the backlight source, configured to adjust a duty cycle of a backlight driving signal for the backlight source such that the backlight source is deactivated when at least one of the pixel circuits is yet to be activated by said scan driver within the frame interval, and configured to adjust the duty cycle of the backlight driving signal to gradually increase brightness of light output from the backlight source when all of the pixel circuits have been activated by said scan driver within the frame interval.2. The backlight driving circuit as claimed in claim 1 , further comprising a data driver adapted for receiving the data voltages ...

Liquid crystal display apparatus

According to one embodiment, a liquid crystal display apparatus includes a display panel, an illumination module which illuminates the display panel, a display controller which controls gradation display which corresponds to an image signal in a first subframe period, and non-gradation display which does not correspond to the image signal in a second subframe period, and performs control in a manner that scanning starting from an upper end and going toward center of the display panel and scanning starting from a lower end and going toward the center of the display panel are alternately performed, and an illumination controller which controls turning on/off of the illumination module.

Brightness Compensation Method and Local Dimming Circuit and Liquid Crystal Display Thereof

The present invention discloses a brightness compensation method. The brightness compensation method includes controlling a plurality of backlights of a plurality of display areas to turn on with a plurality of backlight intensity; calculating a plurality of total backlight intensity; calculating a plurality of actual backlight intensity according to the plurality of total backlight intensity and a backlight scanning ratio; dividing a plurality of maximum backlight intensity when the plurality of backlights are fully turned on by the plurality of actual backlight intensity, to generate a plurality of compensation gains; and displaying a compensated image data with a plurality of compensated image intensity after compensating a plurality of image intensity corresponding to the plurality of display area of an image data with the plurality of compensation gains.

Driving circuit of backlight module and display apparatus using the same

The present invention provides a driving circuit of a backlight module and a display apparatus using the same. The driving circuit comprises at least one transistor connected to light-emitting diodes (LEDs), a constant-current circuit connected to the transistor, a power resist connected to the transistor in parallel; and a power switch connected between the transistor and the power resist, wherein a switch signal is transmitted to the power switch, and a signal level of the switch signal in a three-dimensional (3D) image mode is higher than another signal level of the switch signal in a two-dimensional (2D) image mode. The present invention can be applicable to the display apparatus for raising a brightness of the backlight module in the 3D image mode.

Display Signal Conversion Apparatus

A display device includes a display panel including red, blue, green and white (RBGW) sub pixels, a signal conversion apparatus for converting an input signal having a first color format and color arrangement into a display signal having a second color format and color arrangement, a color conversion unit configured to convert the first color format into the second color format; a sub pixel position determining signal which determines a color arrangement of a sub pixel position of the display panel, and a sub pixel signal generation unit configured to generate a sub pixel signal having the second color format and color arrangement based on the sub pixel position determining signal.

Backlight control method, apparatus and 3d display system

A method includes dividing a backlight source and a liquid crystal panel into N row sections, preprocessing 3D images to output first images and second images of left and right eyes in a complementary format, while preserving odd and even row section images of original images of the left and right eyes, and sequentially scanning the first images and second images of the left and right eyes from top to bottom using the backlight source. The method further includes, after scanning a row section, controlling the backlight of the row section to be turned on and then turned off until the same row section of a next image starts to be scanned, and repeating until all images are scanned. The method thus provides a crosstalk-free 3D effect and reduces power consumption of the backlight source.

IMAGE DISPLAY DEVICE AND IMAGE DISPLAY METHOD

Control sections of displays each determine control information Pi used when area-active driving is performed individually and transmit the control information Pi to a multi-display control section . The multi-display control section determines control information Ps for the entire device on the basis of the received pieces of control information Pi and transmits the control information Ps to the control sections of the displays . All the displays perform area-active driving on the basis of the same control information Ps. In this way, occurrence of a luminance difference or chromaticity difference among display screens of the displays is prevented and the quality of a displayed image is improved. 1. An image display device of multi-display type , comprising:a plurality of image display sections each including a display panel, a backlight, and a local control section configured to perform area-active driving; anda global control section configured to transmit and receive control information to and from the local control sections, wherein:the local control sections each determine local control information and transmit the local control information to the global control section, the local control information being control information used when area-active driving is performed individually,the global control section determines global control information on the basis of the pieces of local control information received from the local control sections and transmits the global control information to the local control sections, the global control information being control information for the entire device, andthe local control sections each operate on the basis of the global control information received from the global control section.2. The image display device according to claim 1 , wherein the local control information and the global control information each include information related to control of luminance of the backlight.3. The image display device according to ...

Liquid crystal display device capable of reducing residual images and related method thereof

A method of reducing residual images of a liquid crystal display device includes generating multiple pulse width modulation signals corresponding to display blocks of a liquid crystal panel in turn; generating multiple driving signals corresponding to the display blocks according to the pulse width modulation signals; and correspondingly providing backlight to the display blocks according to the driving signals. During each frame period of the liquid crystal panel, each pulse width modulation signal has a first fixed width pulse voltage and a second fixed width pulse voltage. A period between a beginning of the first fixed width pulse voltage and an end of the second fixed width pulse voltage is longer than or equal to 16 milliseconds minus a predetermined time. A period between the end and a beginning of a first fixed width pulse voltage of a next frame period is shorter than or equal to the predetermined time.

Display method and apparatus having a display panel with a backlight unit utilizing white and blue light sources

A display apparatus is disclosed. The display apparatus includes a panel unit which comprises a plurality of sub pixels having different colors; a backlight unit which provides backlight to the panel unit using a white light source and a blue light source; an image processing unit which converts image data into first color frame data and second color frame data; a panel driving unit which turns on a first color sub pixel according to the first color frame data, and which turns on a second color sub pixel according to the second color frame data; a backlight driving unit for driving the backlight unit; and a control unit which controls the backlight driving unit to consecutively turn on the white light source and the blue light source according to operations of the panel driving unit. Accordingly, brightness may be enhanced.

Side-edge non-uniform duty ratio backlight driving method

A side-edge non-uniform duty ratio backlight driving method includes: conducting a simulation operation of driving a side-edge backlight module on the basis of uniform duty ratio according to predetermined liquid crystal panel signal and backlight scanning timing before an actual operation of driving the backlight module is performed; conducting analysis of the number of zones where an interference signal appears when each backlight sections is lit in the simulative operation and distance of the interference signal and ranking the backlight sections according to strength of cross-talking so that a backlight section having less strong cross-talking is set with a higher rank; and carrying out a driving operation according to predetermined scanning timing of the liquid crystal panel signal and the backlighting in actually driving a side-edge backlight module in such a way that a high duty ratio of backlight driving is set to a high-rank backlight section in lighting.

Ventilation system with a two-point perspective view

The disclosure describes a novel approach for displaying information on a ventilator system. The disclosure describes a novel respiratory system including a primary display and system status display. Further, the disclosure describes a novel method for displaying ventilator information.

Custom PSFs Using Clustered Light Sources

Light sources of a backlight are configured to customize the shape of light emitted from the clusters. The clusters are activated as a unit and modulated as to brightness, but of the customized shape. All clusters can have a similar customized PSF, or the customization of each cluster may be varied in real time. Real time changes of a clusters PSF may be based, for example, an image or a region of the image to be displayed using the clusters.

BACKLIGHT UNIT AND DISPLAY DEVICE

A display device includes a display panel for displaying an image, a backlight unit positioned in the rear of the display panel, and a back cover positioned in the rear of the backlight unit. The backlight unit includes a substrate part including a plurality of substrates, and a plurality of light sources disposed on each of the plurality of substrates. A transverse width and a longitudinal width of at least one of the plurality of substrates are different from a transverse width and a longitudinal width of at least one of the remaining substrates, respectively. 1. A backlight unit comprising:a substrate part including a plurality of substrates; anda plurality of light sources disposed on each of the plurality of substrates,wherein a transverse width and a longitudinal width of at least one of the plurality of substrates are different from a transverse width and a longitudinal width of at least one of the remaining substrates, respectively.2. The backlight unit of claim 1 , wherein the substrate claim 1 , which has a maximum length in a horizontal direction among the plurality of substrates claim 1 , is positioned on a first long side of the substrate part and a second long side opposite the first long side.3. The backlight unit of claim 1 , wherein the number of light sources disposed on at least one of the plurality of substrates is different from the number of light sources disposed on at least one of the remaining substrates.4. The backlight unit of claim 3 , wherein the substrate claim 3 , which has the minimum number of light sources among the plurality of substrates claim 3 , is positioned on the corner of the substrate part.5. The backlight unit of claim 1 , wherein the substrate claim 1 , which has a maximum length in a vertical direction among the plurality of substrates claim 1 , is positioned on a first short side of the substrate part and a second short side opposite the first short side.6. The backlight unit of claim 1 , wherein the light sources are ...

Method of dimming backlight assembly

A plurality of gray-scale values is extracted from image signals corresponding to a dimming area to calculate a mean value of the gray-scale values, and at least one of a variance, a standard deviation, a kurtosis, a skewness, a central moment, and an image moment is calculated using the mean value. Then, a representative gray-scale value corresponding to the dimming area is determined using the calculated values, and a dimming function for the light sources included in the dimming area is determined based on the representative gray-scale value. Then, the light sources included in the dimming area are driven based on the dimming function.

DISPLAY APPARATUS AND CONTROL METHOD THEREOF

A display apparatus comprises: a display unit configured to display an image; a light emission unit configured to be capable of individually controlling light emission for each of a plurality of divided regions; an acquisition unit configured to acquire, for each divided region, a characteristic value of the image displayed on each of the divided regions; and a control unit, wherein the control unit controls light emission of the light emission unit such that: in a moving image region, in which only a moving image is displayed, among the plurality of divided regions, light is emitted at brightness based on a characteristic value of the moving image region; and in a mixed region, in which both of the moving image and a still image are displayed, among the plurality of divided regions, light is emitted at predetermined brightness. 1. A display apparatus comprising:a display unit configured to display an image on a screen;a light emission unit configured to be capable of individually controlling light emission for each of a plurality of divided regions that configure the screen;an acquisition unit configured to acquire, for each divided region, a characteristic value of the image displayed on each of the divided regions; anda control unit configured to control light emission of the light emission unit, whereinthe control unit controls the light emission of the light emission unit such that:in a moving image region, in which only a moving image is displayed, among the plurality of divided regions, light is emitted at brightness based on a characteristic value of the moving image region; andin a mixed region, in which both of the moving image and a still image are displayed, among the plurality of divided regions, light is emitted at predetermined brightness.2. A display apparatus comprising:a display unit configured to display an image on a screen;a light emission unit configured to be capable of individually controlling light emission for each of a plurality of divided ...

DISPLAY DEVICE AND FINDER DEVICE

This finder display device is provided with a liquid crystal panel, a backlight, and a light source driving section. The backlight has a light guide having a side near which first to sixth light sources are disposed. The light source driving section sets the first and fifth light sources as a first sub-light source group, the second and sixth light sources as a second sub-light source group, and the third and fourth light sources as a third sub-light source group, and periodically supplies driving pulses to the first to third sub-light source groups at respectively different timings. The light source driving section controls the amounts of light of the light source groups by changing the pulse widths of the driving pulses. 1. A display device comprising:a liquid crystal panel;a backlight that illuminates the liquid crystal panel with light, the backlight having at least one light guide having a first side and a second side facing the first side on both of which a light source group formed of plural light sources is disposed, and;common lines each of which is provided for each of plural sub-light source groups divided from the light source group, the light sources included in each of the sub-light source groups being connected commonly to the common line; anda light source driving section to which one of the plural common lines is connected, the light source driving section supplying driving pulses to the connected common line,wherein each of the sub-light source groups includes at least one of the light sources on the first side and at least one of the light sources on the second side, and the light source on the first side and the light source on the second side belonging to the same sub-light source group are not facing each other,wherein each of the plural common lines except the common line connected to the light source driving section are connected through at least one signal delay circuit to the common line connected to the light source driving section, ...

LIQUID CRYSTAL DISPLAY DEVICE

A liquid crystal display device includes a backlight module, a liquid crystal panel, a color filter and a controller. The backlight module includes a light guide plate having a light-input surface and a light-output surface, a plurality of white LEDs and a plurality of blue LEDs. Both the white LED and the blue LED face to the light-input surface. The while LED includes a blue light chip for giving out blue light and phosphor powder excited by the blue light, and the blue LED includes a blue light chip. The liquid crystal panel is opposite to the light-output surface. The color filter is opposite to the liquid crystal panel. The color filter includes a red photoresist for red light to pass through only, a green photoresist for green light to pass through only and a transparent photoresist for light of any color to pass through. 1. A liquid crystal display device , comprising:a backlight module, the backlight module comprising a light guide plate, a plurality of white light emitting diodes (LEDs) for giving out white light and a plurality of blue LEDs for giving out blue light and corresponding to the plurality of white LEDs, the light guide plate comprising a light-input surface and a light-output surface, both the plurality of white LEDs and the plurality of blue LEDs face to the light-input surface, each white LED comprising a blue light chip for giving out blue light and phosphor powder excited by the blue light, and each blue LED comprising a blue light chip;a liquid crystal panel, the liquid crystal panel being opposite to the light-output surface to receive light from the backlight module;a color filter, the color filter being opposite to the liquid crystal panel and configured to receive light traversing through the liquid crystal panel, the color filter comprising a red photoresist for red light to pass through only, a green photoresist for green light to pass through only and a transparent photoresist for light of any color to pass through; anda controller, ...

ELECTRONIC DEVICE, OPERATION METHOD OF THE ELECTRONIC DEVICE, AND MOVING VEHICLE

Provided is an electronic device whose display quality is independent of environment light. The electronic device is provided with an optical sensor, an acceleration sensor, and the like so that information including the brightness of external light, the angle of external light incident on the electronic device, and the orientation of the display portion in the electronic device is obtained, and the luminance and color tone of the display portion in the electronic device are corrected on the basis of the information. As the correcting method, calculation using a neural network is performed using the luminance and color tone meeting the preference of the user as teacher data and the obtained information as input data. The calculation result is reflected on the luminance and color tone of the display portion in the electronic device, whereby an image with display quality that suits the user's preference can be displayed. 1. An electronic device comprising:a sensor; and a first product-sum operation circuit including a first terminal;', 'a second product-sum operation circuit including a second terminal;', 'a first switch circuit including a third terminal and a fourth terminal; and', 'a second switch circuit including a fifth terminal and a sixth terminal,, 'a semiconductor device comprisingwherein:the first terminal is electrically connected to the third terminal,the second terminal is electrically connected to the fifth terminal,the fourth terminal is electrically connected to the sixth terminal,the first switch circuit is configured to connect or disconnect the third terminal and the fourth terminal,the second switch circuit is configured to connect or disconnect the fifth terminal and the sixth terminal,the semiconductor device is configured to generate third data in accordance with first data acquired by the sensor and second data selected by a user, andthe second data includes a first set value corresponding to first luminance and a first color tone.2. The ...

SMART PIXEL LIGHTING AND DISPLAY MICROCONTROLLER

A light emitting assembly is described. In one embodiment, one or more light emitting diode (LED) devices and one or more microcontrollers are bonded to a same side of a substrate, with the one or more microcontrollers to switch and drive the one or more LED devices. 1. (canceled)2. A light emitting assembly comprising:an array of light emitting diode (LED) device and an array of microcontroller chips arranged in an array of micro-matrices, each micro matrix including a matrix of light emitting diode (LED) devices electrically connected with a microcontroller chip;wherein each microcontroller chip includes a first output pin that is electrically coupled with a first string of LED devices to drive the first string of LED devices, and a second output pin that is electrically coupled with a second string of LED devices to drive the second string of LED devices.3. The assembly of claim 2 , further comprising one or more column drivers electrically connected with the array of microcontroller chips.4. The assembly of claim 3 , further comprising one or more row drivers electrically connected with the array of microcontroller chips.5. The assembly of claim 3 , further comprising distribution lines to electrically connect the array of microcontroller chips and the array of LED devices.6. The assembly of claim 5 , wherein each LED device in the array of LED devices has a maximum length or width dimension of 1 to 100 μm.7. The assembly of claim 2 , further comprising distribution lines to electrically connect the array of microcontroller chips and the array of LED devices claim 2 , wherein the distribution lines electrically connect a plurality of microcontroller chips of the array of microcontroller chips to one another.882. The assembly of claim 7 , wherein each LED device in the array of LED devices has a maximum length or width dimension of 1 to 100 m.9. The assembly of claim 8 , wherein the array of LED devices is bonded to landing pads in electrical connection with the ...

High Dynamic Range Image Processing Method and Apparatus

A high dynamic range image processing method and apparatus to resolve a problem of displayed-image distortion, where the method includes obtaining a high dynamic range image, dividing the high dynamic range image into a first liquid crystal image and a first backlight image, performing compression processing on the first liquid crystal image by decreasing a quantity of bits representing a single pixel of the first liquid crystal image to obtain a compressed first liquid crystal image to be displayed at a liquid crystal layer of a display, where the display is configured to display the high dynamic range image, and performing compression processing on the first backlight image by decreasing a quantity of bits representing a single pixel of the first backlight image to obtain a compressed first backlight image to be displayed at a backlight layer of the display. 1. A high dynamic range image processing method , comprising:obtaining a high dynamic range image;dividing the high dynamic range image into a first liquid crystal image and a first backlight image;performing compression processing on the first liquid crystal image by decreasing a quantity of bits representing a single pixel of the first liquid crystal image to obtain a compressed first liquid crystal image to be displayed at a liquid crystal layer of a display, the display being configured to display the high dynamic range image; andperforming compression processing on the first backlight image by decreasing a quantity of bits representing a single pixel of the first backlight image to obtain a compressed first backlight image to be displayed at a backlight layer of the display.2. The method of claim 1 , wherein performing the compression processing on the first liquid crystal image comprises:dividing the first liquid crystal image into at least two layers of second liquid crystal images, the at least two layers of second liquid crystal images comprising image information of the first liquid crystal image, ...

DISPLAY APPARATUS AND CONTROL METHOD THEREOF

There is provided a display apparatus including a display panel configured to display a plurality of frame images, a backlight unit including a plurality of light sources provided on at least one side of the display panel, the plurality of lights being arranged in a scanning direction of the display panel and a controller configured to divide an area of the display panel into a plurality of sub areas in a direction perpendicular to a direction in which the plurality of light sources are arranged and synchronize a dimming signal applied to at least one light source, among the plurality of light sources, a position of a subpixel area having a largest size of a motion among the plurality of sub areas. 1. A display apparatus comprising:a display panel configured to display a plurality of frame images;a backlight unit comprising a plurality of light sources provided on at least one side of the display panel, the plurality of lights being arranged in a scanning direction of the display panel; anda controller configured to divide an area of the display panel into a plurality of sub areas in a first direction perpendicular to a second direction in which the plurality of light sources are arranged and synchronize a dimming signal applied to at least one light source, among the plurality of light sources, at a position of a sub area having a largest size of a motion among the plurality of sub areas.2. The display apparatus according to claim 1 , wherein the controller is further configured to generate a dimming control signal for synchronizing an application time point of the dimming signal with a scanning time point of the sub area having the largest size of the motion.3. The display apparatus according to claim 2 , wherein the controller is further configured to the dimming control signal by providing an offset between the scanning time point of the sub area having the largest size of the motion and the application time point of the dimming signal.4. The display apparatus ...

CURRENT PROTECTION SYSTEMS AND METHODS FOR ELECTRONIC DEVICE DISPLAYS

Aspects of the subject technology relate to electronic devices with displays. A display may include an array of display pixels and control circuitry for operating the display. The control circuitry may determine, based on pixel values for a row of display pixels, that a current in common supply voltage circuitry for the display pixels will exceed a threshold, if the row of display pixels is operated using the pixel values. The control circuitry may modify the pixel values for the row of display pixels to reduce the current in the common supply voltage circuitry and/or prevent the current in the common supply voltage circuitry from exceeding the threshold. 1. An electronic device with a display , the display comprising:an array of display pixels arranged in rows and columns; and illuminate each display pixel in a first row of display pixels based on a display pixel value for that display pixel;', 'receive a display pixel value for each display pixel in a second row of display pixels;', 'determine a difference between the display pixel value for each display pixel in the second row and the display pixel value for a corresponding display pixel in the first row;', 'determine a total of the determined differences;', 'compare the total of the determined differences to a threshold; and', 'determine whether to modify the display pixel values for the second row of display pixels based on the comparison., 'control circuitry for the array of display pixels, the control circuitry configured to2. The electronic device of claim 1 , wherein the first and second rows of display pixels each include positive polarity display pixels and negative polarity display pixels claim 1 , and wherein the control circuitry is configured to determine the total of the determined differences by:determining a total of the determined differences for pairs of positive polarity display pixels in the first and second rows;determining a total of the determined differences for pairs of negative polarity ...

Backlights with Dynamic Dimming Ranges

An electronic device may be provided with a display. The display may include a backlight having an array of locally dimmable light sources. Control circuitry may provide control signals to the backlight to produce light at different brightness levels. When the brightness level is below a threshold, the control circuitry may use pulse-width-modulation control signals to control the light sources in the backlight. When the brightness level is above the brightness threshold, the control circuitry may use analog control signals to control the light sources in the backlight. The control circuitry may adjust the threshold to achieve different dimming ranges for different brightness settings. A low brightness setting, for example, may have a lower threshold and lower dimming range than a high brightness setting, which may help produce darker darks when the display operates in a low brightness setting. 1. An electronic device , comprising:a display having a backlight with at least one light source that generates light at a brightness level; and operate the display according to a brightness setting;', 'determine a threshold brightness based on the brightness setting; and', 'provide analog control signals to the light source when the brightness level is greater than the threshold brightness and pulse-width-modulation control signals to the light source when the brightness level is less than the threshold brightness., 'control circuitry configured to2. The electronic device defined in wherein the light source forms part of an array of light sources in the backlight.3. The electronic device defined in wherein the array of light sources comprises locally dimmable light sources.4. The electronic device defined in wherein the array of light sources comprises a two-dimensional array of light-emitting diodes.5. The electronic device defined in further comprising:an ambient light source that measures an ambient light level, wherein the brightness setting is based on the ambient light ...

Dimming method and dimming device for backlight module

A dimming method and dimming device for a backlight module are provided. The dimming method includes the following steps. Light distribution information of a plurality of light sources of the backlight module corresponding to a display panel is provided. According to the light distribution information of each of the light sources, a plurality of light contribution ratios of the light sources corresponding to a plurality of different positions of the display panel are obtained respectively. According to the light contribution ratios corresponding to the different positions, the needed intensity of each of the light sources is determined respectively.

OPTICAL ASSEMBLY, BACKLIGHT UNIT INCLUDING THE SAME, AND DISPLAY APPARATUS INCLUDING THE BACKLIGHT UNIT

An optical assembly includes a plurality of light sources emitting light in a first direction at a predetermined orientation angle, and a light guide panel having a light incident section and a light emitting section. The light incident section has a first surface to receive the light emitted from the light sources in the first direction and the light emitting section is to emit light received from the light incident section in a second direction. Also included is at least one cover having a first surface adjacent the light sources and a second surface adjacent at least one portion of the light emitting section. 1. A light unit comprising:at least one optical assembly includes:a light source having a substrate and a plurality of light emitting devices on the substrate;a light guide panel having a light incident section to receive light from a first direction and a light emitting section adjacent to the light incident section to emit light received from the light incident section in a second direction; anda first cover fixing the light source and the light guide panel; anda driving unit independently or divisionally driving the at least one optical assembly,wherein the plurality of light emitting devices are divided into a plurality of division groups,wherein a first light emitting device in a first division group among the plurality of division groups emits light independently from a second light emitting device in a second division group among the plurality of division groups such that a brightness of the first division group is different from a brightness of the second division group.2. The light unit of claim 1 , wherein the at least one optical assembly is arrayed in an N×M matrix claim 1 , (N is the number of rows along the first direction claim 1 , M is the number of columns along a direction perpendicular to the first direction claim 1 , and M and N are natural numbers) andwherein a brightness of entire light emitting devices in the first division group is ...

Image display device and method

An image display method includes the steps of: acquiring a third image formed by applying dynamic range extension processing to a first image and a second image photographed with low sensitivity or low exposure with respect to the first image, or a fourth image without dynamic range extension processing; displaying the acquired image in a transmissive type display panel; and making backlight luminance of a segment corresponding to a high luminance portion in the third image higher than backlight luminance of a segment corresponding to a low luminance portion when the acquired image is determined to be the third image.

Light source device and light emission control method

Provided are a light source device, a light emission control method, and a computer program for mitigating flickers. The light source device includes a plurality of light sources, and a controller configured to individually control the plurality of light sources to emit light. The controller controls one or more of the plurality of light sources to emit light at random in a time domain or controls such that light emission timings of the plurality of light sources do not overlap.

Led backlight apparatus and method

Backlit video display systems where the backlights (for example, LED backlights) are controlled based at least in part on the content of the video signal of the video that is being displayed by the backlit video display system. The system can provide specific control of the three primary colors (for example, red, green and blue LEDs). The system can provide content-based control in a spatial mode. The system is a smart backlighting system with content-based controls at the following levels: (i) spectral, (ii) spatial, and (iii) temporal control. Also, some embodiments may provide a novel way of providing a backlit video display system with night vision (NV) capability through a unique four LED chip architecture.

LIGHT CONTROL DEVICE, DISPLAY DEVICE, MULTISCREEN DISPLAY SYSTEM, LIGHT CONTROL METHOD, AND PROGRAM

A display apparatus in a multiscreen display system includes an enlargement processing unit that converts a video signal of a video source to a video signal of an enlarged video having a size corresponding to a large screen and outputs a video signal of a sectional video in the enlarged video so as to display the sectional video on a liquid crystal panel, where the sectional video is associated with a position on the large screen formed by arranged screens of liquid crystal panels; a video analyzing unit that analyzes the video signal of the video source before this video signal is converted by the enlargement processing unit to the video signal of the enlarged video, so as to obtain predetermined video characteristics about the video signal of the video source; and a light control unit that performs light control of a backlight in accordance with a light control value. 1. A light control device comprising: converts a video signal of a video source to a video signal of an enlarged video having a size corresponding to a large screen which is formed by arranging screens of a plurality of display devices in accordance with a predetermined arrangement pattern, and', 'outputs a video signal of a sectional video in the enlarged video so as to display the sectional video on a liquid crystal panel that corresponds to one of the screens, where the sectional video is associated with a position of the relevant screen in the large screen;, 'an enlargement processing unit thata video analyzing unit that analyzes the video signal of the video source before this video signal is converted by the enlargement processing unit to the video signal of the enlarged video, so as to obtain predetermined video characteristics about the video signal of the video source; anda light control unit that performs light control of a backlight, which emits light to the liquid crystal panel, in accordance with a light control value determined according to the video characteristics analyzed by the ...

High dynamic range displays using filterless LCD(s) for increasing contrast and resolution

A display provides increased contrast and resolution via first LCD panel energized to generate an image and a second LCD panel configured to increase contrast of the image. The second panel is an LCD panel without color filters and is configured to increase contrast by decreasing black levels of dark portions of images using polarization rotation and filtration. The second LCD panel may have higher resolution than the first LCD panel. A half wave plate and/or film is placed in between the first and the second panel. The panels may be directly illuminated or edge lit, and may be globally or locally dimmed lights that may also include individual control of color intensities for each image or frame displayed. 1. A multi-modulation projector , comprising:a light source;a first controllable panel illuminated by the light source;a second controllable panel illuminated by the first controllable panel;a controller configured to receive image data and energize the first and second controllable panels in a manner to produce a desired image;wherein the first controllable panel is configured as a brightness modulator and is configured to steer light toward highest luminance areas in an image produced by the first controllable panel;wherein the second controllable panel is configured to further modulate the image produced by the first controllable panel so as to produce the desired image.2. The multi-modulation projector according to claim 1 , further comprising a light field simulation module configured to determine a light field incident on the second controllable modulator.3. The multi-modulation projector according to claim 1 , wherein the light field simulation takes into account a scale of modulation prior to illumination of the second controllable panel.4. The multi-modulation projector according to claim 1 , wherein the light field simulation takes into account a scale of diffusion prior to illumination of the second controllable panel.5. The multi-modulation projector ...

Manufacturing apparatus

A manufacturing apparatus includes a manufacturing unit; a cover that includes a see-through portion; an input unit that occupies a predetermined area on a surface of the see-through portion and detects a contact to the predetermined area and outputs information regarding the detection; a display that displays a predetermined image at a position of the cover; and a controller that in response to a predetermined input to the input unit, controls the display to display the predetermined image at or near a position where the predetermined input is detected, controls the display to display a predetermined operation panel image as the predetermined image at or near a position on the cover that overlaps the input unit; and controls the manufacturing unit based on a detection position of the predetermined input on the predetermined operation panel image.

Illumination Devices and Related Systems and Methods

Illumination devices and related systems and methods are disclosed that can be used for LCD (Liquid Crystal Display) backlights, LED lamps, or other applications. The illumination devices can include a photo detector, such as a photodiode or an LED or other light detecting device, and one or more LEDs of different colors. A related method can be implemented using these illumination devices to maintain precise color produced by the blended emissions from such LEDs. One application for the illumination devices is backlighting for FSC (Field Sequential Color) LCDs (Liquid Crystal Displays). FSC LCDs temporally mix the colors in an image by sequentially loading the red, green, and blue pixel data of an image in the panel and flashing the different colors of an RGB backlight. Precise and uniform color temperature across such a display can be advantageously maintained by continually monitoring ratios of photodiode currents induced by the different colored LEDs in each illumination device as each color is flashed.

DISPLAY CONTROL METHOD, TIMING CONTROLLER IC, AND DISPLAY DEVICE

The preset disclosure provides a display control method, a timing controller IC and a display device. The method includes: acquiring a preset grayscale voltage of a target pixel unit and a backlight brightness of a backlight region corresponding to the target pixel unit, in a current output display frame; outputting a first grayscale voltage to the target pixel unit if the backlight brightness of the corresponding backlight region is less than or equal to a first preset brightness value; outputting a second grayscale voltage to the target pixel unit if the backlight brightness of the corresponding backlight region is greater than the first preset brightness value; wherein the second grayscale voltage is greater than the first grayscale voltage, and both the second grayscale voltage and the first grayscale voltage are greater than the preset grayscale voltage. 1. A display control method , comprising:acquiring a preset grayscale voltage of a target pixel unit and a backlight brightness of a backlight region corresponding to the target pixel unit, in a current output display frame;outputting a first grayscale voltage to the target pixel unit if the backlight brightness of the corresponding backlight region is less than or equal to a first preset brightness value; outputting a second grayscale voltage to the target pixel unit if the backlight brightness of the corresponding backlight region is greater than the first preset brightness value;wherein the second grayscale voltage is greater than the first grayscale voltage, and both the second grayscale voltage and the first grayscale voltage are greater than the preset grayscale voltage.2. The display control method according to claim 1 , further comprising:outputting a third grayscale voltage to the target pixel unit if the backlight brightness of the corresponding backlight region is greater than or equal to a second preset brightness value;wherein the second preset brightness value is greater than the first preset ...

DISPLAY DEVICE AND METHOD FOR DRIVING SAME

A display device () comprises a display panel (), a backlight module (), and a driving circuit (). The backlight module () comprises a backlight source and a partition control unit. The partition control unit is used to partition the backlight source into a plurality of regions, and to independently control the luminance of each colored light source at each region. The driving circuit () is used to: acquire an input signal of each given image to be displayed; display said image by means of two sub-frames at the front and the back thereof; determine, according to a driving voltage of pixels corresponding to each region, a magnitude of a backlight brightness compensation signal of each region; and adjust, according to the backlight brightness compensation signal, the luminance of each region. ss 1. A driving method for a display device , comprising:dividing a backlight source of the display device into a plurality of regions, pixels of the display device being divided into blocks in a one-to-one correspondence to the regions of the backlight source; and the backlight source comprises light sources of a plurality of colors;independently controlling an emergent light brightness of a light source of each color in each of the regions with a regional control unit;acquiring an input signal of each frame of image to be displayed;displaying each frame of image by a front sub-frame and a rear sub-frame, a driving voltage of a pixel of one sub-frame being higher than a driving voltage of a same pixel in another sub-frame;determining, according to the driving voltage of the pixel corresponding to each of the regions, amplitude of backlight brightness compensation signals of the light source of each color in each of the regions respectively corresponding the two sub-frames; the higher the driving voltage is, the weaker the backlight brightness compensation signal is, and the lower the driving voltage is, the stronger the backlight brightness compensation signal is, so as to ...

METHOD FOR CONTROLLING LIGHT SOURCE OF DISPLAY DEVICE AND LCD DEVICE

A method for controlling a light source of a liquid crystal display (LCD) device includes dividing each frame of image to be displayed into a plurality of areas and obtaining a first brightness value of each area. Any difference between the first brightness values of any two adjacent areas is determined to be less than or greater than a preset threshold. If greater, the first brightness value of at least one of the two adjacent areas is adjusted to be a second brightness value, so as to increase the difference in brightness between the adjacent two areas. If less than or equal, the second brightness value of each area is rendered equal to the first brightness value. Light intensity or brightness of the light-emitting elements is thus adjusted for a high contrast display of areas where this is required. 1. A method for controlling a light source of a liquid crystal display device , the light source comprising a plurality of light-emitting elements , the method comprising:dividing each frame of image to be displayed into a plurality of areas and obtaining the first brightness value of each of the plurality of areas, each of the plurality of areas corresponding to a plurality of pixels of the image to be displayed and corresponding to at least one of the plurality of light-emitting elements;determining whether a difference between first brightness values of any two adjacent areas is greater than a preset threshold, whereinif the difference is greater than the preset threshold, the first brightness value of at least one of the two adjacent areas is adjusted to be a second brightness value to increase the difference between the first brightness values of the adjacent two areas, andif the difference is not greater than the preset threshold, the second brightness value of each area is equal to the first brightness value of the area; andadjusting light intensity of the plurality of light-emitting elements according to the second brightness value of each of the plurality of ...

METHOD FOR DRIVING LIQUID CRYSTAL DISPLAY APPARATUS

A method for driving a display apparatus. The method comprises: dividing an original gray scale data set of a pixel unit () into three grayscale data sets, and then, when the divided grayscale data sets are displayed, turning off backlight units (), the colors of which are the same and occupy most of the colors corresponding to 0 grayscale data. 1. A driving method for a liquid crystal display device , wherein the liquid crystal display device comprises a display module and a backlight module; the display module comprises a plurality of pixel units arranged in an array; the pixel unit comprises a red sub-pixel , a green sub-pixel and a blue sub-pixel; the pixel unit generates a color of any one of the following three types: a unitary color , a binary mixed color and a ternary mixed color each time; the backlight module is provided with a plurality of backlight units; the backlight units comprise a red light source , a green light source and a blue light source; the display module is divided into at least two display areas mutually independent; the display area corresponds to at least one of the backlight units , and the backlight units corresponding to different display areas are mutually independent , wherein the driving method comprises:dividing an original gray-scale data group corresponding to each pixel unit into a first gray-scale data group, a second gray-scale data group and a third gray-scale data group according to a set grouping rule; the first gray-scale data group being a ternary mixed color gray-scale data group, a binary mixed color gray-scale data group or a unitary color gray-scale data group;', 'the second gray-scale data group being a binary mixed color gray-scale data group or a unitary color gray-scale data group; and', 'the third gray-scale data group being a unitary color gray-scale data group;, 'outputting and displaying the first gray-scale data group, the second gray-scale data group and the third gray-scale data group in three consecutive ...

Display device and drive method therefor

A polarity inversion control section ( 9 ) supplies a polarity designation signal, which designates a polarity of a data signal, to a data line drive circuit ( 5 ) while reversing a polarity of the polarity designation signal every frame. Even in a case where a pause driving control section ( 8 ) receives a designation signal that designates a sum of the number of frames constituting a scanning period and the number of frames constituting a pause period to be an even number, the pause driving control section ( 8 ) maintains the sum of the number of frames constituting a scanning period and the number of frames constituting a pause period to be an odd number.

ILLUMINATING A FIRST LIGHT SOURCE AND A SECOND LIGHT SOURCE OF A DISPLAY DEVICE

A display device can include a first light source and a second light source different in color gamut than the first light source. It can be determined if an image to be displayed would benefit from the second light source. 1. A computing system comprising:a display device to display an image;a first light source in the white color gamut to illuminate the image on the display device;a second light source different in color gamut than the first light source to illuminate the image on the display device;a controller to illuminate the first light source in a first system condition and illuminate the second light source in a second system condition.2. The system of claim 1 , wherein the controller illuminates the first light source in the second system condition.3. The system of claim 1 , wherein the system condition is the power state of the system.4. The system of claim 1 , wherein the color gamut of the second light source is variable.5. The system of claim 4 , wherein the color gamut of the second light source changes in response to an image to be displayed on the display device.6. The system of claim 5 , wherein the color gamut of the first light source is not variable.7. The system of claim 1 , further comprising a liquid crystal display wherein the first light source and the second light source are a backlight for the liquid crystal display.8. The system of claim 1 , wherein the first light source and the second light source are turned off when an image displayed is black.9. A method of selectively increasing color gamut of a displayed image comprising:determining if an image to be displayed would benefit from a wide color gamut mode;illuminating a display with a first light source if it is determined the image o be displayed would not benefit from the wide color gamut mode; andilluminating the display with a second light source if it is determined the image to be displayed would benefit from the wide color gamut mode.10. The method of claim 9 , further comprising ...

DISPLAY DRIVING METHOD AND COMPUTER APPARATUS

A driving method for display includes: acquiring an original gray scale data group of each of pixel units of a content to be displayed in a preset display area; determining average gray scales of each of hues in the preset display area according to the original gray scale data group; acquiring original light source intensities of each of the hues of the content to be displayed in the preset display area; dividing the original gray scale data group into a first gray scale data group and a second gray scale data group according to the original gray scale data group of each of the pixel units, the average gray scales of each of the hues, and the original light source intensities, and determining driving light source intensities of each of the hues in the preset display area; 1. A display driving method , comprising:acquiring an original gray scale data group of each of pixel units of a content to be displayed in a preset display area;determining average gray scales of each of hues in the preset display area according to the original gray scale data group;acquiring original light source intensities of each of the hues of the content to be displayed in the preset display area; anddividing the original gray scale data group into a first gray scale data group and a second gray scale data group according to the original gray scale data group of each of the pixel units, the average gray scales of each of the hues, and the original light source intensities, and determining driving light source intensities of each of the hues in the preset display area;wherein a gray scale of each of the hues of the first gray scale data group is a maximum gray scale in the original gray scale data group; a gray scale of each of the hues of the second gray scale data group is 0 or is greater than a minimum gray scale in the original gray scale data group.2. The display driving method according to claim 1 , wherein the step of determining driving light source intensities of each of the hues in ...

Display apparatus and display method thereof

A display method of a display apparatus includes: obtaining at least one set of viewing position parameters; determining a target display area within an active area of the display apparatus according to the at least one set of viewing position parameters; and displaying images in the target display area.

PLANAR ILLUMINATION APPARATUS

A planar illumination apparatus includes: a plurality of light sources that are disposed linearly and that emit light; and a light guide plate that has a lateral surface on which the light sources are disposed so as to face the lateral surface and includes extended portions each extending in directions in which the extended portions are spaced away from each other from both ends of the lateral surface and are away from the light sources. The light guide plate has a light emitting region that is either in contact with a boundary or disposed on a side opposite to one of the extended portions with respect to the boundary, in which the boundary is established between an emission range of an end portion light source on a side adjacent to the extended portion and a region different from the emission range. 1. A planar illumination apparatus , comprising:a plurality of light sources disposed linearly, the light sources emitting light; and a lateral surface on which the light sources are disposed so as to face the lateral surface and', 'extended portions extending in directions in which the extended portions are spaced away from each other from both ends of the lateral surface and are away from the light sources, wherein, 'a light guide plate having'}the light guide plate has a light emitting region that is either in contact with a boundary or disposed on a side opposite to one of the extended portions with respect to the boundary, the boundary being established between an emission range of an end portion light source on a side adjacent to the extended portion and a region different from the emission range.2. The planar illumination apparatus according to claim 1 , wherein the light emitting region extends over a side of the extended portion beyond the end portion light source in a direction in which the light sources are disposed.3. The planar illumination apparatus according to claim 1 , wherein the light emitting region is either in contact with the boundary or disposed ...

Display System Having Monitoring Circuit and Methods Thereof

A modular multi-panel display system includes a mechanical support structure, an array of light emitting diode (LED) display panels arranged in rows and columns and mounted to the mechanical support structure so as to form an integrated display. A receiver box is mounted to the mechanical support, where the receiver box is housed in a housing that is separate from housings of each of the led display panels. The receiver box includes a receiver card coupled to feed data to be displayed on the integrated display to a plurality of the led display panels, where the receiver box includes a network interface card configured to receive data from a control box disposed at a remote location. A monitoring circuit is disposed within the receiver box, where the monitoring circuit is configured to generate an operational data of the array of LED display panels, where the network interface card is configured to send the operational data from the monitoring circuit to a monitoring server.

BACKLIGHT UNIT AND DISPLAY APPARATUS INCLUDING THE SAME

A backlight unit includes a power converter which generates a light source power voltage at a first node in response to a voltage control signal, at least one light emitting diode string which is connected between the first node and a second node and receives the light source power voltage through the first node, and a controller connected to the second node where the controller detects current of a detection node varying based on a duty ratio of the power control signal, and controls current flowing through the second node when the detected current is greater than a reference value. 1. A backlight unit , comprising:a power converter which generates a light source power voltage to a first node in response to a voltage control signal;at least one light emitting diode string which is connected between the first node and a second node, and receives the light source power voltage through the first node; anda controller connected to the second node,wherein the controller detects current of a detection node varying based on a duty ratio of the power control signal, and controls current flowing through the second node when the detected current is greater than a reference value.2. The backlight unit of claim 1 , wherein the controller comprises:a voltage controller which outputs the voltage control signal having a pulse width corresponding to a voltage level of the second node; anda current controller which detects the current of the detection node, and controls the current flowing through the second node when the detected current is greater than the reference value.3. The backlight unit of claim 2 , wherein the current controller comprises:a smoothing circuit which smoothens a voltage of the detection node to output a feedback voltage;a comparison circuit which compares the feedback voltage and the reference value to output a detection voltage corresponding to a comparison result; anda feedback control circuit which controls the current flowing through the second code ...

IMAGE PROCESSING METHOD AND LIQUID CRYSTAL DISPLAY DEVICE

Embodiments of the application provide an image processing method and apparatus, and a liquid crystal display device, and relate to the field of image processing, where backlight values in respective backlight zones are determined as a function of values of grayscale brightness in a displayed image, display values in sub-pixels in a display zone corresponding to a target backlight zone are compensated for according to the result of comparing the backlight value in the target backlight zone with the weighted average of the backlight values in the other backlight zones. 1. An image processing method , applicable to a liquid crystal display device comprising a plurality of display zones , and a plurality of backlight zones , each of which is mapped to corresponding one of the display zones , the method comprises:obtaining, by the liquid crystal display device, backlight values in respective backlight zones as a function of values of grayscale brightness of a displayed image; andcomparing, by the liquid crystal display device, the backlight value in a target backlight zone with the weighted average of the backlight values in the other backlight zones, and compensating for values of color levels for display data in sub-pixels in a display zone corresponding to the target backlight zone according to a result of comparison.2. The image processing method according to claim 1 , wherein compensating for the values of color levels for the display data in the sub-pixels in the display zone corresponding to the target backlight zone comprises:compensating for values of color levels for display data in red and green sub-pixels in the display zone corresponding to the target backlight zone; orcompensating for values of color levels for display data in blue sub-pixels in the display zone corresponding to the target backlight zone.3. The image processing method according to claim 2 , wherein compensating for the values of color levels for the display data in the sub-pixels in the ...