UNIAXIALLY ORIENTED ARTICLE HAVING A STRUCTURED SURFACE

A process for uniaxially stretching films (9) having a structured surface comprising a geometric feature (15) is described. The process provides a film (10) in which the cross sectional shape of the feature (16) after stretching is substantially identical to the cross sectional shape of the feature (15) prior to stretching. Structured surface articles are also described. The articles have substantially the same uniaxial orientation throughout the film, including the geometric structure. © KIPO & WIPO 2007 ...

Birefringent structured film for LED color mixing in a backlight

An article for use in light spreading includes a body having first and second surfaces, and first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axes in a thickness direction of the body. A portion of the first surface is a birefringent structured surface. The portion is structured such that, when the article receives a light signal within a particular range of wavelengths, the structured surface causes splitting the light signal into a plurality of divergent light signals. The article can be used for color mixing such as in a cavity providing a backlight for LCD devices or other display devices requiring a backlight.

UNIAXIALLY ORIENTED BIREFRINGENT ARTICLE HAVING A STRUCTURED SURFACE

An article, such as a film, comprising a body portion and a surface portion is provided. The body portion has (i) a first and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the body. The surface portion comprises a linear geometric feature disposed on the first surface of the body in a direction substantially parallel to the first in-plane axis of the polymeric body. The article has (i) a first index of refraction (n1) along the first in-plane axis, (ii) a second index of refraction (n2) along the second in-plane axis, and (iii) a third index of refraction (n3) along the third axis, wherein n2 and n3 are substantially the same but substantially different from n1; and wherein the uniaxially oriented polymeric film has a relative birefringence of 0.3 or less and wherein the ratio of the thickness of the body to the height ...

STRUCTURED ORIENTED FILMS FOR USE IN DISPLAYS

A process for uniaxially stretching films having a structured surface with an engineered feature, such as prism grooves, for use in making brightness enhancement film, reflective polarizers, or others to be used in displays. © KIPO & WIPO 2008 ...

BIREFRINGENT STRUCTURED FILM FOR LED COLOR MIXING IN A BACKLIGHT

An article for use in light spreading includes a body having first and second surfaces, and first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axes in a thickness direction of the body. A portion of the first surface is a birefringent structured surface. The portion is structured such that, when the article receives a light signal within a particular range of wavelengths, the structured surface causes splitting the light signal into a plurality of divergent light signals. The article can be used for color mixing such as in a cavity providing a backlight for LCD devices or other display devices requiring a backlight.

OPTICAL ARTICLE HAVING PROTECTIVE LAYER

Disclosed herein is an optical article including a multilayer optical film of alternating layers of first and second optical layers, wherein the first and second optical layers have refractive indices along at least one axis that differ by at least 0.04; and a protective layer disposed on an outer surface of the multilayer optical film, the protective layer having a thickness of less than about 0.5 um and including crosslinked hydroxylated polymer. The optical article may further include a microstructured layer disposed on an outer surface of the multilayer optical film opposite the protective layer. Also disclosed herein are a method of making the optical article and a display device including the optical article.

Structured oriented films for use in displays

The invention relates to film used in display with backlight comprising: reflection polaroid and birefringent brightness enhancement films.

HIGH PERFORMANCE PHOTOCURABLE OPTICALLY CLEAR ADHESIVE

The present invention is an optically clear, curable adhesive including a polyvinylbutyral, a polyurethane (meth)acrylate, and a photoinitiator. The polyvinylbutyral has a dynamic viscosity of between about 9 and about 13 mPA·s and a polyvinyl alcohol weight percent of less than about 18%. The polyurethane (meth)acrylate includes the reaction product of a diol, at least one diisocyanate, and a hydroxyfunctional (meth)acrylate or an isocyanatofunctional (meth)acrylate. When the optically clear, curable adhesive is placed between two transparent substrates and made into a laminate, the laminate has a haze of less than about 6%, a transmission of greater than about 88% and an optical clarity of greater than about 98% when cured. The optically clear, curable adhesive also has a peel adhesion of at least about 100 g/cm based on ASTM 3330 when cured. 1. An optically clear , curable adhesive comprising:a polyvinylbutyral having a dynamic viscosity of between about 9 and about 13 mPA·s and having a polyvinyl alcohol weight percent of less than about 18%; a diol;', 'at least one diisocyanate; and', 'a hydroxyfunctional (meth)acrylate or an isocyanatofunctional (meth)acrylate; and, 'a polyurethane (meth)acrylate comprising the reaction product ofa photoinitiator;wherein when the optically clear, curable adhesive is placed between two transparent substrates and made into a laminate, the laminate has a haze of less than about 6%, a transmission of greater than about 88% and optical clarity of greater than about 98% when cured, andwherein the optically clear, curable adhesive has a peel adhesion of at least about 100 g/cm based on ASTM 3330 when cured.2. The optically clear claim 1 , curable adhesive of claim 1 , wherein the diol is selected from one of a poly(tetramethylene oxide) diol having a number average molecular weight of about 1000 g/mol or less and a polycaprolactone diol having a number average molecular weight of about 1000 g/mol or less.3. The optically clear claim ...

HIGH PERFORMANCE PHOTOCURABLE OPTICALLY CLEAR ADHESIVE

The present invention is an optically clear, curable adhesive including a polyvinylbutyral, a polyurethane (meth)acrylate, a (meth)acrylate monomer, and a photoinitiator. The polyvinylbutyral has a dynamic viscosity of between about 9 and about 13 mPA·s and a polyvinyl alcohol weight percent of less than about 18%. The polyurethane (meth)acrylate includes the reaction product of a diol, at least one diisocyanate, and a hydroxyfunctional (meth)acrylate or an isocyanatofunctional (meth)acrylate. When the optically clear, curable adhesive is placed between two transparent substrates and made into a laminate, the laminate has a haze of less than about 6%, a transmission of greater than about 88%, and an optical clarity of greater than about 98% when cured. The optically clear, curable adhesive also has a peel adhesion of at least about 100 g/cm based on ASTM 3330 when cured. 1. An optically clear , curable adhesive comprising:a polyvinylbutyral having a dynamic viscosity of between about 9 and about 30 mPA·s and having a polyvinyl alcohol weight percent of between about 14% and about 21%; a diol;', 'at least one diisocyanate; and', 'a hydroxyfunctional (meth)acrylate or an isocyanatofunctional (meth)acrylate;, 'a polyurethane (meth)acrylate comprising the reaction product ofa (meth)acrylate monomer; anda photoinitiator;wherein when the optically clear, curable adhesive is placed between two transparent substrates and made into a laminate, the laminate has a haze of less than about 6%, a transmission of greater than about 88% and optical clarity of greater than about 98% when cured, andwherein the optically clear, curable adhesive has a peel adhesion of at least about 100 g/cm based on ASTM 3330 when cured.2. The optically clear claim 1 , curable adhesive of claim 1 , wherein the diol is selected from one of a poly(tetramethylene oxide) diol having a number average molecular weight of about 2000 g/mol or less claim 1 , a poly(propylene oxide) diol having a number average ...

Structured oriented films for use in displays

Sheeting for use in a display with a backlight, comprising, in the following order from the backlight towards the viewer: a reflective polariser; and a birefringent brightness enhancement film.

Uniaxially oriented articles having structured surface

Uniaxially oriented articles having structured surfaces are described. The articles have dimensional relationships as follows: the (a) ratio of the thickness of the body (Z') to the height of the geometric feature (P') is at least about 2; or (b) the ratio of body thickness to feature height (Z':P') is at least about 1 and the ratio of feature height to feature separation (P':FS') is at least about 1; or (c) the ratio of body thickness to feature height (Z':P') is at least about 1 and the ratio of feature base width to feature separation (BW': FS') is at least about 1; or (d) the ratio of body thickness to feature base width (Z':BW') is at least about 3; or (e) the ratio of body thickness to feature base width (Z':BW') is at least about 1 and the ratio of feature height to feature separation (P':FS') is at least about 1; or (f) the ratio of body thickness to feature base width (Z':BW') is at least about 1 and the ratio of feature base width to feature separation (BW':FS') is at least about 1; or (g) the ratio of feature base width to feature top width (BW':TW') is at least about 2 and the ratio of feature base width to feature separation (BW':FS') is at least about 1.

Uniaxially oriented articles having structured surface

Uniaxially oriented articles having structured surfaces are described. The articles have dimensional relationships as follows: the (a) ratio of the thickness of the body (Z') to the height of the geometric feature (P') is at least about 2; or (b) the ratio of body thickness to feature height (Z':P') is at least about 1 and the ratio of feature height to feature separation (P':FS') is at least about 1; or (c) the ratio of body thickness to feature height (Z':P') is at least about 1 and the ratio of feature base width to feature separation (BW': FS') is at least about 1; or (d) the ratio of body thickness to feature base width (Z':BW') is at least about 3; or (e) the ratio of body thickness to feature base width (Z':BW') is at least about 1 and the ratio of feature height to feature separation (P':FS') is at least about 1; or (f) the ratio of body thickness to feature base width (Z':BW') is at least about 1 and the ratio of feature base width to feature separation (BW':FS') is at least about 1; or (g) the ratio of feature base width to feature top width (BW':TW') is at least about 2 and the ratio of feature base width to feature separation (BW':FS') is at least about 1.

Optical article having protective layer

Disclosed herein is an optical article including a multilayer optical film of alternating layers of first and second optical layers, wherein the first and second optical layers have refractive indices along at least one axis that differ by at least 0.04; and a protective layer disposed on an outer surface of the multilayer optical film, the protective layer having a thickness of less than about 0.5 um and including crosslinked hydroxylated polymer. The optical article may further include a microstructured layer disposed on an outer surface of the multilayer optical film opposite the protective layer. Also disclosed herein are a method of making the optical article and a display device including the optical article.

Uniaxially oriented birefringent article having a structured surface

An article, such as a film, comprising a body portion and a surface portion is provided. The body portion has (i) a first and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the body. The surface portion comprises a linear geometric feature disposed on the first surface of the body in a direction substantially parallel to the first in-plane axis of the polymeric body. The article has (i) a first index of refraction (n1) along the first in-plane axis, (ii) a second index of refraction (n2) along the second in-plane axis, and (iii) a third index of refraction (n3) along the third axis, wherein n2 and n3 are substantially the same but substantially different from n1; and wherein the uniaxially oriented polymeric film has a relative birefringence of 0.3 or less and wherein the ratio of the thickness of the body to the height of the geometric feature is at least 2.

Structured oriented films for use in displays

Sheeting for use in a display with a backlight, comprising, in the following order from the backlight towards the viewer: a reflective polariser; and a birefringent brightness enhancement film.

Structured oriented films for use in displays

Films having a structured surface with an engineered feature, such as prism grooves, to be used in displays having a backlight. The films can be arranged in a stack having one or more of the following: birefringent brightness enhancement films, non-birefringent brightness enhancement films, polarizers, diffusers, birefringent turning films, and non-birefringent turning films. Those films can be arranged in any order from the backlight to a viewer.

Method of making uniaxially oriented articles having structured surfaces

A process for uniaxially orienting articles having a structured surface comprising a geometric feature is described. The process comprises steps of: (a) providing a polymeric film having (i) a first structured surface and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the polymeric film, wherein the first structured surface has a geometric feature disposed thereon in a direction substantially parallel to the first in-plane axis; and subsequently (b) uniaxially orienting the polymeric film in a direction substantially parallel to the first in-plane axis of the polymeric film.

Method of making uniaxially oriented articles having structured surfaces

A process for uniaxially orienting articles having a structured surface comprising a geometric feature is described. The process comprises steps of: (a) providing a polymeric film having (i) a first structured surface and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the polymeric film, wherein the first structured surface has a geometric feature disposed thereon in a direction substantially parallel to the first in-plane axis; and subsequently (b) uniaxially orienting the polymeric film in a direction substantially parallel to the first in-plane axis of the polymeric film.

Strukturierte orientierte filme zur verwendung in displays