Patent ID: 7038744
Filing Date: 2006-05-02
Classification: C08L,C09K,G02B,G02F

Abstract:
1. A polarizing plate used in a vertical alignment mode liquid crystal display comprising a liquid crystal cell, the polarizing plate comprising a polarizing film and a mixed fatty acid cellulose ester film with optical biaxiality provided between the polarizing film and the liquid crystal cell, the mixed fatty acid cellulose ester of the mixed fatty acid cellulose ester film having a total acyl substitution degree of from more than 1.5 to 2.8 and an acetyl substitution degree of less than 2.0, wherein the mixed fatty acid cellulose ester film has a retardation in plane R 0 of from 31 to 120 nm, and a retardation in the thickness direction Rt of from 60 to 300 nm, in which R 0 is represented by the following formula (1) and Rt is represented by the following formula (2): wherein nx is refractive index in plane of the film in a first direction giving a maximum refractive index, ny is refractive index in plane of the film in a second direction normal to the first direction, nz is refractive index in the thickness direction of the film, and d is thickness (nm) of the film.