A projector is provided to ensure the enhancement of contrasts while reducing the needs for alignment accuracy. The projector includes a light source, a first lens array, a second lens array, a superimposing lens, and a projection lens. The first lens array splits light emitted by the light source into...http://www.google.com.au/patents/US6886945?utm_source=gb-gplus-sharePatent US6886945 - Projector
