Patent ID: 7471360

Claim:
A liquid crystal display device, comprising: a liquid crystal cell operable in a vertical alignment mode; a polarizing plate A including a protective film A 1 , a protective film A 2 and a polarizer sandwiched between the protective films A 1 and A 2 ; a polarizing plate B including a protective film B 1 , a protective film B 2 and a polarizer sandwiched between the protective films B 1 and B 2 ; wherein the polarizing plates A and B are provided to sandwich the liquid crystal cell therebetween in such a way that the protective films A 2 and B 2 are positioned respectively at a liquid crystal cell side to face the liquid crystal cell, wherein at least one of the protective films A 2 and B 2 is a cellulose ester film Y that satisfies both conditions that a film in-plane retardation value Ro is 0 to 10 nm and a film thickness direction retardation value Rt is −20 to 20 nm, the retardation values Ro and Rt are defined by Formulas (a) and (b), and at least one of the protective films A 2 and B 2 is an optical compensation film W having an optical anisotropic layer, Ro =( nx−ny )× d Formula (a) Rt =(( nx+ny )/2 −nz )× d Formula (b) in the formulas, nx is a refractive index in a slow phase axis direction in the film plane, ny is a refractive index in a fast phase axis direction in the film plane, nz is a refractive index in a film thickness direction and d is the film thickness (nm), and the refractive indexes are measured with light having a wavelength of 590 nm.