A projection type display apparatus includes a light source, color separator, half-wave plate, a plurality of light valves, color synthesizer, and projection lens. The light source emits a substantially parallel illumination flux. The color separator separates the light emitted from...http://www.google.fr/patents/US5738426?utm_source=gb-gplus-shareBrevet US5738426 - Projection type display apparatus and multi-vision projection type display apparatus
Projection type display apparatus and multi-vision projection type display ...
