A display device in the form of a slim screen projector has a beam-splitter and a reflector co-planar and in contact with each other. Incident light from a light source strikes the beam-splitter and reflector and a portion thereof is directed towards a mirror. Light from the mirror then passes through...http://www.google.com.au/patents/US5184238?utm_source=gb-gplus-sharePatent US5184238 - Apparatus for projecting light onto a surface having reflector means for improving the brightness of the image
