An Optical System for High-Brightness Projector using a 10.4inch TFT-LCD

Abstract

A high-brightness rear type projector using a 10.4inch color liquid crystal panel has been developed. The optical illumination system consisting of four metal halide lamps and optical integrators has improved the brightness and uniformity of the projected image. A fresnel lens with suitable lens pitch and inclined non-lens surface has contributed to the reduction of both the size and the cost of an optical projection lens.