The color display device includes at least a light source which emits at least two primary wavelengths and an array of holographic lenses (HL). Also included is a spatial light modulator (LCD) which includes one picture element (pixel) for each holographic lens with each pixel including one subpixel...http://www.google.ca/patents/US5940050?utm_source=gb-gplus-sharePatent US5940050 - Color display device for monovalve projectors
