A three dimensional display is provided which can. operate in an autostereoscopic mode, requiring no viewing aid, and a stereoscopic mode, requiring a viewing aid such as polarized spectacles. In the autostereosocopic mode, light from illuminators is imaged by lenses through LCD display panels at regions...http://www.google.ca/patents/US6449090?utm_source=gb-gplus-sharePatent US6449090 - Three dimensional display viewable in both stereoscopic and autostereoscopic modes
