Patent ID: 7847898

Claim:
An in-plane switching liquid crystal display comprising: a first polarizer plate; a liquid crystal cell, which is filled with liquid crystal of positive dielectric anisotropy (Δε>0) or negative dielectric anisotropy (Δε<0), an optical axis of the liquid crystal filled in the liquid crystal cell being aligned in-plane in parallel to a polarizer plate; and a second polarizer plate, wherein an absorption axis of the first polarizer plate is perpendicular to an absorption axis of the second polarizer plate, and the optical axis of the liquid crystal filled in the liquid crystal cell is parallel to the absorption axis of the first polarizer plate, wherein first and second A-plates are interposed between the liquid crystal cell and the second polarizer plate, the second A-plate is aligned adjacent to the second polarizer plate, an optical axis of the first A-plate is perpendicular to the absorption axis of the second polarizer plate, an optical axis of the second A-plate is parallel to the absorption axis of the second polarizer plate, an in-plane retardation value of the first A-plate is in a range of 100 nm to 150 nm at a wavelength of 550 nm and an in-plane retardation value of the second A-plate is in a range of 350 nm to 450 nm at a wavelength of 550 nm.