Patent ID: 8208079

Claim:
A liquid crystal display system comprising: a liquid crystal device configured to optically modulate a light beam emitted through a liquid crystal layer with vertically aligning liquid crystal molecules which have a negative dielectric constant anisotropy and have a pretilt with respect to a direction vertical to a main surface of a substrate of the liquid crystal device; a first polarizer arranged on a light incident side of the liquid crystal device; a second polarizer arranged on a light emission side of the liquid crystal device; a pre-polarizer arranged between the light emission side of the liquid crystal device and a light incident side of the second polarizer; an optical compensator arranged in a light path between a light emission side of the first polarizer and the light incident side of the second polarizer; and a rotation portion to rotate the optical compensator and capable of rotating the optical compensator in the plane of the optical compensator, wherein, the optical compensator has at least two compensation layers arranged so that surfaces of the layers face each other, the at least two compensation layers are positioned so that values of phase differences of the compensation layers and directions of optical axes, corresponding to slow axes or fast axes of materials forming the compensation layers, in the planes of the surfaces of the layers, are different from each other, each of the first polarizer, the second polarizer, and the pre-polarizer includes a triacetyl cellulose (TAC) film having a phase difference in the plane through which light passes, and an angle of rotation of the optical compensator is set such as to cancel the phase differences of the TAC films of the first and second polarizers and the pre-polarizer.