A liquid crystal display includes a backlight that provides light and selectively modifies the transmission of light from the backlight to the front of the display. The backlight includes a plurality of spaced apart light waveguides and a plurality of selection elements associated with the light waveguides...http://www.google.ca/patents/US7982823?utm_source=gb-gplus-sharePatent US7982823 - Area active backlight with steerable backlight
