Abstract: 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>ny?nz; and a retardation film B that is fixed to homeotropic alignment and has positive refractive-index anisotropy characterized by nz1>nx1?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.

Abstract: An optical film (3) of the invention comprises a polarizing Plate (1), in which a transparent protective film (1b) is laminated on both sides of a polarizer (1a), 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).

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: An elliptically polarizing plate of the invention comprises: a polarizer; and an optical film that comprises a laminate of: a retardation film A that comprises a cyclic polyolefin resin-containing thermoplastic polymer and has uniaxially-aligned positive refractive-index anisotropy characterized by nx>ny?nz, wherein nx is a refractive index in the direction of X axis along which the in-plane refractive index is maximum, ny is a refractive index in the direction of Y axis perpendicular to X axis, and nz is a refractive index in the direction of Z axis that is the direction of the thickness; and a retardation film B that is fixed to homeotropic alignment and has positive refractive-index anisotropy characterized by nz1>nx1?ny1, wherein nx1 is a refractive index in the direction of X axis along which the in-plane refractive index is maximum, ny1 is a refractive index in the direction of Y axis perpendicular to X axis, and nz1 is a refractive index in the direction of Z axis that is the direction of the thi

Abstract: An optical film(3) of the invention comprises a polarizing plate(1), in which a transparent protective film(1b) is laminated on both sides of a polarizer(1a), 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).

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: An optical film obtained by stretching a polymer film comprising a polycarbonate resin and a styrene resin: wherein a photoelastic coefficient is 2.0×10?11 to 6.0×10?11 m2/N, and a three dimensional refractive index is controlled so that an Nz coefficient may satisfy a relationship of Nz?0.9 and a front retardation (Re) may satisfy a relationship of Re?80 nm, has characteristics of giving wide viewing angle and also outstanding durability.

Abstract: An oriented film of polyvinyl alcohol derived film with reduced stretch irregularity and uniform orientation in a wide range of a stretching ratio is obtained by a manufacturing method for an oriented film, comprising the steps of: contacting a non-stretched film, comprising polyvinyl alcohols or derivatives thereof, with moisture percentage adjusted to no more than 10%, to at least one heating roll currently driven and heating the film at no less than 70° C.; subsequently giving a tension and stretching using a peripheral velocity difference between the heating roll concerned and a stretch roll in a position ahead of said heating roll in a running direction of the film.

Abstract: An optical film obtained by stretching a polymer film comprising a polycarbonate resin and a styrene resin: wherein a photoelastic coefficient is 2.0×10?11 to 6.0×10?11 m2/N, and a three dimensional refractive index is controlled so that an Nz coefficient may satisfy a relationship of Nz?0.9 and a front retardation (Re) may satisfy a relationship of Re?80 nm, has characteristics of giving wide viewing angle and also outstanding durability.

Abstract: An oriented film of polyvinyl alcohol derived film with reduced stretch irregularity and uniform orientation in a wide range of a stretching ratio is obtained by a manufacturing method for an oriented film, comprising the steps of: contacting a non-stretched film, comprising polyvinyl alcohols or derivatives thereof, with moisture percentage adjusted to no more than 10%, to at least one heating roll currently driven and heating the film at no less than 70° C.; subsequently giving a tension and stretching using a peripheral velocity difference between the heating roll concerned and a stretch roll in a position ahead of said heating roll in a running direction of the film.

Abstract: An oriented film of polyvinyl alcohol derived film that demonstrates a small dimensional change under a heated or humidified condition is obtained by a manufacturing method for an oriented film comprising the steps of; stretching in two to six times a non-stretched filmwith moisturepercentage adjusted to no more than 10% comprising polyvinyl alcohols or derivatives by heating at no less than 70° C.; and subsequently annealing by heating again at no less than 70° C. after once cooling at no more than 40° C.