A display system has a controlled transmission mirror disposed between the light sources and the display panel. The controlled transmission mirror includes a light-diverting input coupling element facing the light sources, a light-diverting output coupling element facing the display panel and a multilayer...http://www.google.de/patents/US7903194?utm_source=gb-gplus-sharePatent US7903194 - Optical element for lateral light spreading in back-lit displays and system using same
