A display device having a backlighting system supplying collimated light, a transmissive electro-optical modulator of the liquid crystal display type and a means for distributing the light angularly. The distance between the means for distributing the light angularly and the display is chosen so as to...http://www.google.ca/patents/US5990993?utm_source=gb-gplus-sharePatent US5990993 - Display device having a backlighting system supplying collimated light
