Patent ID: 7365816

Claim:
A liquid crystal display comprising: an in-plane switching liquid crystal panel containing a liquid crystal layer whose alignment orientation changes according to an electric field in parallel with a surface of a substrate; a first polarizing plate and a second polarizing plate disposed sandwiching the liquid crystal panel therebetween; a first optical film inserted between the first polarizing plate and the liquid crystal panel; and a second optical film inserted between the second polarizing plate and the liquid crystal panel, wherein the first optical film includes: a retardation film A 1 having a relation of nz>nx≧ny; and a retardation film B having in-plane retardation (Re) in the range of from 200 to 300 nm, a relation of nx>nz>ny and satisfying Nz coefficient in the range of 0.3<Nz<0.7, in which three-dimensional refractive indices are controlled; the second optical film includes a retardation film A 2 having a relation of nz>nx≧ny; and the slow axis of the retardation film B is in parallel with or perpendicular to the absorption axes of the first and second polarizing plates, where, in each of the films, the direction along with the in-plane refractive index in the film plane is maximized is defined as the X axis, the direction perpendicular to the X axis is defined as the Y axis, the direction of the thickness of the film is defined by the Z axis, and refractive indices in each axial directions at 590 nm are defined as nx, ny and nz, respectively, and the thickness of the film is defined as d (nm), the in-plane retardation (Re) and Nz are given by the following equations: in-plane retardation (Re)=( nx - ny )× d and Nz =( nx - nz )/( nx - ny ).