There is disclosed a projection device which includes a light source constituted of a reflector and a light source lamp, a projection system including a projection encoder for forming a light image based on an input image signal to project it by use of light from the light source, a micromirror element...http://www.google.ca/patents/US7753534?utm_source=gb-gplus-sharePatent US7753534 - Projection device and projection control method
