Nitto-denko Corporation

Naoki Koishi

Shuuji Yano

Masaki Hayashi

Kenji Yoda

Kentarou Kobayashi

Masatoshi Tomonaga

Mie Nakata

Naoto Ooe

Masahiro Hata

Masato Bitou

Misaki Sabae

A laminated optical film according to an embodiment of the present invention includes a polarizer; a first optical compensation layer which has a refractive index ellipsoid showing a relationship of nx&#x3e;ny&#x3e;nz; and a second optical compensation layer which has a refractive index ellipsoid showing a relationship of nz&#x3e;nx&#x3e;ny, wherein the polarizer and the first optical compensation layer are placed so that an absorption axis of the polarizer is parallel to or perpendicular to a slow axis of the first optical compensation layer, and the polarizer and the second optical compensation layer are placed so that an absorption axis of the polarizer is parallel to or perpendicular to a slow axis of the second optical compensation layer.

Laminated optical film having a polarizer and two optical compensation layers, and liquid crystal panel and liquid crystal display apparatus using the laminated optical film

It is the object of the present invention to provide a polarizing element capable of increasing a contrast ratio in an oblique direction and reducing a color shift in an oblique direction of a liquid crystal display apparatus. A polarizing element according to the present invention includes a polarizer, a negative C plate, a positive A plate, and a positive C plate each arranged on one side of the polarizer. The positive A plate is arranged between the polarizer and the positive C plate such that a slow axis of the positive A plate is substantially perpendicular to an absorption axis of the polarizer. The positive C plate has Rth[590] of &#x2212;60 nm or less.

Polarizing element, liquid crystal panel, liquid crystal television, and liquid crystal display apparatus

A retardation film which hardly causes shift or unevenness in retardation values and which has a refractive index profile of nx&#x3e;nz&#x3e;ny (that is, 0&#x3c;Rth[590]/Re[590]&#x3c;1) is provided. A retardation film according to an embodiment of the present invention comprises a stretched polymer film containing a styrene-based resin and a polycarbonate-based resin, which satisfies the following expressions (1) and (2):100 nm&#x2266;Re[590]&#x2266;350 nm&#x2003;&#x2003;(1)0.2&#x2266;Rth[590]/Re[590]&#x2266;0.8&#x2003;&#x2003;(2)

Retardation film and method of producing the same, and optical film, liquid crystal panel, and liquid crystal display apparatus all using the retardation film

A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a first polarizer arranged on one side of the liquid crystal cell; a second polarizer arranged on another side of the liquid crystal cell; a negative biaxial optical element and a positive C plate arranged between the liquid crystal cell and the first polarizer; and an isotropic optical element arranged between the liquid crystal cell and the second polarizer. Here, the negative biaxial optical element is arranged between the first polarizer and the positive C plate.

Liquid crystal panel and display apparatus having a negative biaxial element of 110 to 250 nm thickness direction retardation value and an Nz coefficient of 1.4 or more

A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a first polarizer arranged on one side of the liquid crystal cell; a second polarizer arranged on another side of the liquid crystal cell; a positive A plate and a positive C plate arranged between the liquid crystal cell and the first polarizer; and an isotropic optical element arranged between the liquid crystal cell and the second polarizer, wherein the positive A plate is arranged between the first polarizer and the positive C plate.

Liquid crystal panel and liquid crystal display apparatus

A liquid crystal panel having improved contrast ratio in an oblique direction and good display evenness without causing shift or unevenness in retardation values due to shrinkage stress of a polarizer or heat of backlight is provided. A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a polarizer arranged on both sides of the liquid crystal cell; a first optical element arranged between one polarizer and the liquid crystal cell; and a second optical element arranged between the other polarizer and the liquid crystal cell, wherein: the first optical element comprises a retardation film containing a norbornene-based resin and satisfying the following expressions (1) and (2); and the second optical element has substantially optical isotropy:240 nm&#x2266;[590]&#x2266;350 nm&#x2003;&#x2003;(1)0.20&#x2266;[590]/[590]&#x2266;0.80.&#x2003;&#x2003;(2)

A liquid crystal panel having improved contrast ratio in an oblique direction and good display evenness without causing shift or unevenness in retardation values due to shrinkage stress of a polarizer or heat of backlight is provided. A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a polarizer arranged on both sides of the liquid crystal cell; a first optical element arranged between one polarizer and the liquid crystal cell; and a second optical element arranged between the other polarizer and the liquid crystal cell, wherein: the first optical element comprises a retardation film containing a styrene-based resin and a polycarbonate-based resin and satisfying the following expressions (1) and (2); and the second optical element has substantially optical isotropy:240 nm&#x2266;Re[590]&#x2266;350 nm&#x2003;&#x2003;(1)0.20&#x2266;[590]/[590]&#x2266;0.80.&#x2003;&#x2003;(2)

Growing community of inventors

Osaka, Japan

Naoki Koishi