Nitto-denko Corporation

Hitachi Maxell, Limited

Shuuji Yano

Kenji Yoda

Kentarou Kobayashi

Masayuki Kawai

Seiji Umemoto

Masaki Hayashi

Hiroe Maeda

Akihiro Nishida

Naoki Koishi

Yuuichi Nishikouji

Masatoshi Tomonaga

Takashi Yamaoka

Takezou Hatanaka

Takashi Kondou

Ryouji Kinoshita

Junichi Adachi

Kanako Wasai

Nao Murakami

Satoru Kawahara

Masayuki Satake

Yuusuke Toyama

Takuya Matsunaga

Naoto Ooe

Masahiro Hata

Minoru Miyatake

Hiroyuki Yoshimi

Toshihiko Ariyoshi

Toshimitsu Tachibana

Masakatsu Urairi

Yuuji Saiki

Takayuki Shigematsu

Takao Suzuki

Hiroyuki Iida

Yusuke Toyama

Shouhei Maezawa

Mie Nakata

Kenji Matsumoto

Kazunori Kawamura

Osamu Ishida

Yoshiyuki Kiya

Toshihiko Shinomura

Kanako Itou

Hirotaka Matsuura

A liquid crystal display panel includes a liquid crystal cell, a first polarizing plate placed on one side of the liquid crystal cell, a second polarizing plate placed on the other side of the liquid crystal cell, a retardation film placed between the liquid crystal cell and the first polarizing plate, and a pressure-sensitive adhesive layer placed between the liquid crystal cell and the retardation film, wherein the first and second polarizing plates have absorption axes whose directions are substantially orthogonal to each other, the retardation film is a norbornene resin-containing stretched film and has a refractive index ellipsoid satisfying the relation nx&#x2267;nz&#x3e;ny, and the pressure-sensitive adhesive layer includes a pressure-sensitive adhesive that may be produced by crosslinking a composition including a (meth)acrylate (co)polymer and a crosslinking agent including a peroxide as a main component. When the liquid crystal display panel is viewed from oblique directions, leakage of light and changes in color are small, and when the liquid crystal cell is recycled, the laminated film has a high level of easy peelability.

Liquid crystal display panel and liquid crystal display

A laminated film includes a polarizing plate, a retardation film, and a first pressure-sensitive adhesive layer provided in this order, wherein the polarizing plate includes a polarizer, a first protective layer placed on a side of the polarizer where the retardation film is provided, and a second protective layer placed on another side of the polarizer which is opposite to the side where the retardation film is provided, the retardation film is a stretched film comprising a norbornene resin,

Laminated film

A liquid crystal panel of the present invention comprises at least: a liquid crystal cell comprising a liquid crystal layer containing a liquid crystal molecule that is oriented in homogeneous alignment with no electric field applied thereto; a first polarizer placed on one side of the liquid crystal cell; a first optical element placed between the liquid crystal cell and the first polarizer; and a second polarizer placed on the other side of the liquid crystal cell, wherein the first optical element is substantially optically isotropic, the liquid crystal cell has an initial alignment direction that is substantially parallel to the direction of an absorption axis of the first polarizer, and the absorption axis of the first polarizer is substantially perpendicular to an absorption axis of the second polarizer. The liquid crystal panel shows less discoloration of images even when the screen is viewed from oblique directions.

Liquid crystal panel and liquid crystal display

There is provided a liquid crystal panel and a liquid crystal display apparatus in which light leakage occurring from a peripheral portion of a screen is small, and which has excellent display uniformity in a high humidity environment. A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a first polarizing plate placed on a viewer side of the liquid crystal cell; and a second polarizing plate placed on an opposite side of the viewer side of the liquid crystal cell, wherein a dimensional change ratio (C) of the first polarizing plate is larger than a dimensional change ratio (C) of the second polarizing plate.

Liquid crystal panel and liquid crystal display apparatus

Provided are a liquid crystal panel capable of constituting a liquid crystal display apparatus in which a contrast and a display color are unlikely to change depending upon a viewing angle and an azimuth, and a liquid crystal display apparatus using the liquid crystal panel. The liquid crystal panel of the present invention at least includes a liquid crystal cell, a first polarizer placed on one side of the liquid crystal cell, a second polarizer placed on another side of the liquid crystal cell, a first optical element placed between the liquid crystal cell and the first polarizer, a second optical element placed between the liquid crystal cell and the first optical element, and a third optical element placed between the liquid crystal cell and the second polarizer, in which an absorption axis of the first polarizer is perpendicular to an absorption axis of the second polarizer, the first optical element has a relationship of nz&#x3e;nx=ny, the second optical element has a relationship of nx&#x3e;ny=nz and a slow axis thereof parallel to an absorption axis of the first polarizer, and the third optical element has an optical isotropy.

An elliptically polarizing plate including: a polarizer; and an optical film that includes a laminate of: a retardation film A that includes a cyclic polyolefin resin-containing thermoplastic polymer and has uniaxially-aligned positive refractive-index anisotropy characterized by nx&#x3e;ny&#x2248;nz; and a retardation film B that is fixed to homeotropic alignment and has positive refractive-index anisotropy characterized by nz1&#x3e;nx1&#x2248;ny1, wherein the optical film is laminated on one side of the polarizer in such a manner that a slow axis of the retardation film A is perpendicular to an absorption axis of the polarizer. The elliptically polarizing plate can suppress a reduction in contrast at wide viewing angles when applied to in-plane switching mode active matrix liquid crystal displays, and can be highly effective for improvements against color shift.

Elliptically polarizing plate and image display

A liquid crystal panel including a liquid crystal cell having an improved contrast ratio in an oblique direction and an improved color shift in an oblique direction is provided. A liquid crystal panel according to 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 C plate and a negative A 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. The negative C plate is arranged between the first polarizer and the negative A plate.

Liquid crystal panel, liquid crystal television, and liquid crystal display apparatus

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

An IPS mode liquid crystal display comprising a liquid crystal cell, an optical film (F) provided on a cell substrate on one side of the liquid crystal cell and comprises a polarizing plate comprising a transparent protective film having an in-plane retardation Re 10 nm or less and a thickness direction retardation Rth in the range of from 30 to 100 nm, a retardation film having an Nz value in the range of from 0.3 to 0.7 and an in-plane retardation Rein the range of from 200 to 300 nm, and an optical film (F) provided on a cell substrate on the other side of the liquid crystal cell and comprises the polarizing plate and a retardation film having an Nz value in the range of from 0.9 to 1.2 and an in-plane retardation Rein the range of from 150 to 280 nm, and the absorption axes of the polarizing plates of the optical film (F) and the optical film (F) are perpendicular to each other, and both films are disposed so that the retardation film sides face the liquid crystal cell. The IPS mode liquid crystal display has a high contrast ratio across a wide range, and capable of realizing a better view.

IPS mode liquid crystal display

The present invention provides a liquid crystal display including: a liquid crystal panel; and a lighting device disposed on one side of the liquid crystal panel, the liquid crystal panel including: a liquid crystal cell; a first polarizer disposed on one side of the liquid crystal cell; a second polarizer disposed on the other side of the liquid crystal cell; and a first optical element disposed between the liquid crystal cell and the first polarizer; the absorption axis direction of the first polarizer being substantially perpendicular to the absorption axis direction of the second polarizer, the first optical element having an optical indicatrix having a relationship of nx&#x2267;nz&#x3e;ny, the lighting device having: a maximum value of luminance in the wavelength range of 550&#xb1;50 nm; and a relative luminance at a wavelength of 450 nm is 0.28 or less.

Liquid crystal display

An optical film() of the invention comprises a polarizing plate() and plural retardation films() so that an absorption axis of the polarizing plate() is perpendicular or parallel to slow axes of the plural retardation films() and the slow axes of the plural retardation films() are parallel to one another. An Nz value expressed by Nz=(nx&#x2212;nz)/(nx&#x2212;ny) is in the range of from 0.15 to 0.85 and an in-plane retardation Reexpressed by Re=(nx&#x2212;ny)&#xd7;dis in the range of from 200 to 350 nm, where in each of the plural retardation films, a direction along with the refractive index in the film plane is maximum is defined as the X-axis, a direction perpendicular to the X-axis as the Y-axis, the thickness direction of the film as the Z-axis, and where refractive indices in each axial direction are defined as nx, ny, and nz, respectively, and the thickness of the film as d(nm). The optical film may realize an easily viewable display with high contrast ratio in a wide range.

Optical film and image display

An optical film () of the invention comprises a polarizing Plate (), in which a transparent protective film () is laminated on both sides of a polarizer (), and plural retardation films () so that an absorption axis of the polarizing plate () is perpendicular or parallel to slow axes of the plural retardation films () and the slow axes of the plural retardation films () are parallel to one another. An Nz value expressed by Nz=(nx&#x2212;nz)/(nx&#x2212;ny) is in the range of from 0.15 to 0.85 and an in-plane retardation Reexpressed by Re=(nx&#x2212;ny)&#xd7;dis in the range of from 200 to 350 nm, where in each of the plural retardation films, a direction along with the refractive index in the film plane is maximum is defined as the X-axis, a direction perpendicular to the X-axis as the Y-axis, the thickness direction of the film as the Z-axis, and where refractive indices in each axial direction are defined as nx, ny, and nz, respectively, and the thickness of the film as d(nm). The optical film may realize an easily viewable display with high contrast ratio in a wide range and may provide a retardation value stabilized under conditions of high temperature or high humidity.

Optical film and image viewing display

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.

Growing community of inventors

Ibaraki, Japan

Shuuji Yano