Red, green and blue light sources, and a shutter are provided. Photosensors are provided for detecting the luminance of each of the light sources. A controller is provided for sequentially operating each of the light sources, the shutter, and the photosensor in synchronism with each other at regular...http://www.google.es/patents/US6069676?utm_source=gb-gplus-sharePatente US6069676 - Sequential color display device
