APPARATUS FOR IMPROVING CONTRAST OF LCD PROJECTION SYSTEM, PARTICULARLY REGARDING TO INCREASING CONTRAST WHILE MAINTAINING WHOLE BRIGHTNESS OF PROJECTION SET

摘要

Purpose a: device, for improving the comparison of a LCD projection system, it is arranged to increase comparison when maintaining the entire brightness of a data for projection into an angle of light of the panel of a green by reducing when maintaining to enter the angle of light of red and blue panel. Construction: a lamp (1) generates light. Multiple lens (3,9,10) change light to have an angular distribution characteristic or location distribution characteristic. One hole (16) increases by a comparison that whole projection is arranged by reducing an angle of light among the color lights of transmission lens with most of radiation intensity. Multiple LCD (liquid crystal display) panels (11,12,13) show an image of each color by light, transmit the lens and light with reduced angle.