There is disclosed an optical system for a color picture display having three spatial light modulators of reflecting type corresponding to an optical image of one of three primary colors by photoelectric effect and photomodulation effect, a writing device for guiding writing lights each carrying the...http://www.google.ca/patents/US5130826?utm_source=gb-gplus-sharePatent US5130826 - Optical system having photoconductive members and optical means for decomposing and composing the polarized lights for a color picture display
