To provide a projector or the like, which use a solid-state light-emitting element as light source and which provides a bright, stable, and uniform projection image, the present invention includes: a light source to emit light; a spatial light modulator to modulate the light from the light source in...http://www.google.com.au/patents/US20040263802?utm_source=gb-gplus-sharePatent US20040263802 - Projector and optical device
