A liquid crystal display device comprises a light source, a diffusion plate for diffusing light beams emitted from the light source, and a liquid crystal panel for forming an image thereon as a result of a variation in scattering efficiency wherein the diffusion plate and liquid crystal panel are separately...http://www.google.ca/patents/US5929954?utm_source=gb-gplus-sharePatent US5929954 - Liquid crystal display device and liquid crystal projection display device having a light directivity controller of light beams
