A projection system includes a projection lens unit, a color combiner, and at least a first and a second image-forming devices for generating single color images. The single color images are combined in the color combiner to produce a colored image light beam. The colored image light beam passes from...http://www.google.es/patents/US7686453?utm_source=gb-gplus-sharePatente US7686453 - High contrast liquid crystal display and projection system using same
High contrast liquid crystal display and projection system using same
