Patent ID: 7042540
Filing Date: 2006-05-09
Classification: G02F

Abstract:
1. An optical film in which a polarizing plate and a retardation film are laminated 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=(nx 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 nx and wherein, in the polarizing plate, a first transparent protective film is laminated on one side of a polarizer and a second transparent protective film is laminated on the other side of the polarizer, and the retardation film is laminated on one side of the polarizing plate, wherein an in-plane retardation Re where a direction of each transparent protective 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 nx