Patent ID: 7153552
Filing Date: 2006-12-26
Classification: C09K,G02B,G02F

Abstract:
1. A polarizing plate provided on a surface of a liquid crystal cell of a display, comprising a polarizing element, Film A is provided on one surface of the polarized element, and Film B is provided on the other surface of the polarizing element; wherein Film B is located closer to the liquid crystal cell than Film A in the display; wherein Film A contains a greater amount of a total weight of an ultraviolet absorber and a stabilizer relative to Film B, and Film B contains a greater amount of a retardation increasing agent relative to Film A; and wherein the polarizing plate meets the following conditions (1) to (4): Condition (1): Film A and Film B meet Formula (I) and (II): wherein Wa is equal to a total weight in g/m 2 of a ultraviolet absorber and a stabilizer contained in 1 m 2 of Film A, and Wb is equal to a total weight in g/m 2 of a ultraviolet absorber and a stabilizer contained in 1 m 2 of Film B; Condition (2): Film A and Film B meet Formula (III) and (IV): wherein Ra is equal to a weight in g/m 2 of a retardation increasing agent contained in 1 m 2 of Film A, and Rb is equal to a weight in g/m 2 of a retardation increasing agent contained in 1 m 2 of Film B; Condition (3): Film B meets the following subconditions (a) and (b): (a) Ro of Film B is defined by Formula (V) is not less than 20 nm and not more than 95 nm; and (b) Rth of Film B is defined by Formula (VI) is not less than 70 nm and not more than 400 nm; wherein Ro and Rth are measured at a wavelength of 590 nm at a humidity of 55% RH at 23° C., and wherein nx represents an in-plane refractive index in a direction of a slow axis, ny represents an in-plane refractive index in a direction of a fast axis, nz represents an out-of-plane refractive index in a thickness direction, and d represents a thickness of Film B; and Condition (4): Film A and Film B are cellulose ester films.