04343535 is referenced by 59 patents and cites 4 patents.

Method of and apparatus for operating an electro-optical system for producing high quality images from a liquid crystal light valve.

A polarized projection beam is directed to the reflective surface of a liquid crystal light valve for polarization modulation by means of an input image. The beam is polarization analyzed to thereby generate an output image which typically suffers from color and brightness defects caused by economically unavoidable tolerance variations in the electro-optical system. A second beam of light is generated having a light of a selected color different from the projection beam, is spatially varied in intensity by a spatially graded filter, and super-imposed on the output image so as to eliminate the color and brightness defects as well as enhance color contrast and brightness of the image. The color of the second beam is selected so as to mask background color variations and improve color contrast on the output image while the graded intensity filter is selected to additively compensate for background brightness variation of the output image.

Title
Liquid crystal light valve
Application Number
6/103683
Publication Number
4343535
Application Date
December 14, 1979
Publication Date
August 10, 1982
Inventor
William P Bleha Jr
Carlsbad
CA, US
Agent
W J Bethurum
W H MacAllister
Gerald B Rosenberg
Assignee
Hughes Aircraft Company
CA, US
IPC
G02F 1/135
View Original Source