摘要:
An optical film in which a retardation film is laminated on one side of a polarizing plate, in which a transparent protective film is laminated on both sides of a polarizer, so that an absorbing axis of the polarizing plate and a slow axis of the retardation film may be perpendicular or may be parallel to each other, wherein a value Nz represented by Nz=(nx1−nz1)/(nx1−ny1) satisfies a range of 0.4 through 0.6, and an in-plane retardation Re1=(nx1−ny1)×d1 is 200 through 350 nm, where, a direction of the retardation film in which an in-plane refractive index within the film surface concerned gives a maximum is defined as X-axis, a direction perpendicular to X axis is defined as Y-axis, a thickness direction of the film is defined as Z-axis, refractive indexes in axial direction are defined as nx1, ny1, nz1, respectively, and a thickness of the film is defined as d1 (nm), and the transparent protective films comprise a thermoplastic saturated norbornene resin, may realize an easily viewable display with high contrast ratio in a wide range when applied to a display system and that may provide a retardation value stabilized under conditions of high temperature or high humidity.
摘要:
A light-diffusing sheet includes a transparent film and a light-diffusing layer formed on at least one side of the transparent film. The transparent film contains a thermoplastic resin having a substituted and/or non-substituted imido group in a side chain, and a thermoplastic resin having a substituted and/or non-substituted phenyl group and nitrile group in a side chain, and the surface with the minute unevenness has an average height-depth spacing (Sm): Sm≦80 μm, a center-line average surface roughness (Ra): Ra≦0.25 μm and a ten-point average surface roughness (Rz): Rz≦9Ra.
摘要:
Birefringence of a protective film and leakage of light in a cross-Nicole arrangement of polarizing plates may be canceled, when, as a polarizing plate protective film, using an optical film having an optical compensation layer (2) showing refractive index anisotropy satisfying a relationship of nx2≈ny2>nz2, when a direction where an in-plane refractive index gives a maximum is defined as X-axis, a direction perpendicular to X-axis as Y-axis, a thickness direction as Z-axis, and when refractive indexes in each axial direction are defined as nx2, ny2, and nz2, respectively, on one side of a base material film (1) in which each of refractive index differences represented with |nx1−ny1|, |nx1−nz1| and |nz1−ny1| has values of not more than 0.0006, respectively, when a direction where a refractive index in a film plane gives a maximum is defined as X-axis, a direction perpendicular to X-axis as Y-axis, a thickness direction of the film as Z-axis, and when refractive indexes in each axial direction are defined as nx1, ny1 and nz1, respectively.
摘要:
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 (C1) of the first polarizing plate is larger than a dimensional change ratio (C2) of the second polarizing plate.
摘要:
The present invention provides an optical compensation plate having an optical compensation layer in which cracks occurring due to an applied pressure is suppressed. By applying a curable adhesive agent onto at least one surface of the optical compensation layer and curing the adhesive, an anti-cracking layer is formed directly on the surface of the optical compensation layer. The occurrence of cracks in the optical compensation layer can be prevented by this anti-cracking layer. The optical compensation layer preferably is a layer having a cholesteric structure, and the constituent material thereof is preferably a non-liquid crystal polymer formed by polymerizing aligned liquid crystal monomers or an aligned liquid crystal polymer.
摘要:
A retardation film of the present invention comprises a stretched film of a polymer film containing a norbornene-based resin, wherein the stretched film satisfies the following equation (1) and the equation (2); 100 nm≦(nx−ny)·d≦350 nm . . . (1), 0.1≦(nx−nz)/(nx−ny)≦0.9 . . . (2), where the refractive indices in the slow axis direction, the fast axis direction and the thickness direction of the film are nx, ny and nz, respectively, d(nm) is thickness of the film, and the slow axis direction is a direction that the refractive index in film plane is maximum. The retardation film is hard to cause a shift or an unevenness of a retardation value due to a stress.
摘要:
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.
摘要:
An optical film for a liquid crystal display of the present invention laminating a polarizing plate and a retardation film so that an absorption axis of the polarizing plate and a slow axis of the retardation film are perpendicular or parallel to each other, wherein the polarizing plate comprises a transparent protective film on both surfaces of a polarizer and the transparent protective film has an in-plane retardation Re1=(nx1−ny1)×d1 is 10 nm or less and a thickness direction retardation Rth={(nx1+ny1)/2−nz1}×d1 is in the range of from 30 nm to 100 nm, and the retardation film has an Nz value represented by Nz=(nx2−nz2)/(nx2−ny2) is in the range of from 0.1 to 0.8 and an in-plane retardation Re2=(nx2−ny2)×d2 is in the range of from 60 to 300 nm. The optical film of the invention realizes a high contrast ratio over a wide range and a better view in a case where the optical film is applied to a liquid crystal display driving in IPS mode.
摘要:
An optical film of the invention comprises a polarizing plate obtained by laminating a transparent protective film on at least one surface of a polarizer and a retardation film laminated on one surface of the polarizing plate so that the absorption axis of the polarizing plate and the slow axis of the retardation film are perpendicular to or in parallel with each other, wherein the retardation film satisfies a relation of nx>nz>ny, and the transparent protective film is disposed at least on the retardation film side and is a cellulose-based film with retardation in the thickness direction, which is expressed by (Rth)=(nx−nz)×d, in the range of 0 to 10 nm, where in each of the films, a refractive index of a slow axis direction, a refractive index of a fast axis direction and a refractive index in the thickness direction at a wavelength of 590 nm are represented by nx, ny and nz, respectively, that a film thickness is represented d (nm) and that the slow axis direction is defined as a direction in which a refractive index in a film plane is maximized. The optical film is useful for image viewing display to provide a high contrast ratio over a wide range and to realize a better view.
摘要:
A polarizing plate with an optical compensation layer is provided, which has an excellent peelability and is easy to reattach after mounted on an image display apparatus. A pressure-sensitive adhesive layer satisfying the condition (I) below is formed on both surfaces of an optical compensation layer, and one of the pressure-sensitive adhesive layers is further laminated with a polarizing plate. condition (I): in the case where a pressure-sensitive adhesive layer causing the optical compensation layer and the polarizing plate to adhere to each other is expressed by a pressure-sensitive adhesive layer (A) and the other pressure-sensitive adhesive layer is expressed by a pressure-sensitive adhesive layer (B) and attached to a glass substrate, the pressure-sensitive adhesive layer (A) causing the optical compensation layer and the polarizing plate to adhere to each other has an adhesive strength exceeding 12 N/25 mm, and the pressure-sensitive adhesive layer (B) causing the optical compensation layer and the glass substrate to adhere to each other has an adhesive strength of 1 to 10 N/25 mm.