Abstract:
A retardation film which hardly causes shift or unevenness in retardation values and which has a refractive index profile of nx>nz>ny (that is, 0
Abstract:
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≧nz>ny, the lighting device having: a maximum value of luminance in the wavelength range of 550±50 nm; and a relative luminance at a wavelength of 450 nm is 0.28 or less.
Abstract:
An optical film(3) of the invention comprises a polarizing plate(1) and plural retardation films(2) so that an absorption axis of the polarizing plate(1) is perpendicular or parallel to slow axes of the plural retardation films(2) and the slow axes of the plural retardation films(2) are parallel to one another. An Nz value expressed by Nz=(nx1−nz1)/(nx1−ny1) is in the range of from 0.15 to 0.85 and an in-plane retardation Re1 expressed by Re1=(nx1−ny1)×d1 is 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 nx1, ny1, and nz1, respectively, and the thickness of the film as d1 (nm). The optical film may realize an easily viewable display with high contrast ratio in a wide range.
Abstract:
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≦Re[590]≦350 nm (1) 0.20≦Rth[590]/Re[590]≦0.80. (2)
Abstract:
A light diffusing sheet of a structure in which a light diffusing layer is formed on at least one surface of a transparent film, the light diffusing layer including a resin coat layer having a minute unevenness shape and a low refractive index layer having a refractive index lower than that of the resin coat layer on the surface having a minute unevenness shape thereof, whereby the sheet can retain antiglare property, shows almost no white blurring to be recognized due to surface scattering, exhibits almost no birefringence, and is excellent in adherence and durability even when applied to a high definition LCD.
Abstract:
An optical device including a laminate of cholesteric liquid-crystal layers in which the wavelength ranges of selective reflection of circularly polarized light beams are out of visible light region and which are combined so that circularly polarized light beams transmitted through the cholesteric liquid-crystal layers to be left-handed and right-handed are inverted to each other. A liquid-crystal display apparatus including a vertically aligned liquid-crystal cell, polarizers disposed on opposite surfaces of the liquid-crystal cell, and one or two optical devices defined above and interposed between the liquid-crystal cell and either or each of the polarizers.
Abstract:
A liquid crystal display of the invention comprises an in-plane switching liquid crystal panel containing a liquid crystal layer whose alignment orientation changes according to an electric field in parallel with a surface of a substrate; a first polarizing plate and a second polarizing plate disposed sandwiching the liquid crystal panel therebetween; a first optical film inserted between the first polarizing plate and the liquid crystal panel; and a second optical film inserted between the second polarizing plate and the liquid crystal panel, wherein the first optical film includes: a retardation film A1 having a relation of nz>nx≧ny; and a retardation film B having an in-plane retardation (Re) in the range of from 200 to 300 nm, a relation of nx>nz>ny and satisfying Nz coefficient in the range of 0.3 nx≧ny; and the slow axis of the retardation film B is in parallel with or perpendicular to the absorption axes of the first and second polarizing plates. The liquid crystal display has a high contrast ratio over a wide range.
Abstract:
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.
Abstract:
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.
Abstract:
A laminated retardation plate of the present invention comprises at least two retardation plates made of stretched films of a thermoplastic resin, wherein under the same temperature condition, at least one retardation plate have the relationship of |X1|>|X2|, where X1 represents the dimensional change rate in the direction of slow axis and X2 represents the dimensional change rate in the direction of fast axis; at least one retardation plate have the relationship of |Y1|
Abstract translation:本发明的叠层相位差板包括由热塑性树脂的拉伸膜构成的至少两个相位差板,其中在相同的温度条件下,至少一个延迟板具有| X 1 |> | X 2 |的关系,其中 X 1表示慢轴方向的尺寸变化率,X 2表示快轴方向的尺寸变化率; 至少一个延迟板具有| Y 1 | <| Y 2 |的关系,其中Y 1表示慢轴方向的尺寸变化率,Y 2表示快轴方向的尺寸变化率; 并且每个延迟板被布置成其慢轴的方向处于相同的方向。 在环境温度变化的情况下,层压延迟板的延迟值变化小。