LCD spatial light modulator as electronic parallax barrier

摘要

A spatial light modulator (2) has a modulating region which is capable of operating in two modes. In the first clear mode, the region is continuously and substantially uniformly transmissive. In a second or barrier mode, the region can be switched to form a parallax barrier comprising slits (4) which are separated by continuous opaque regions. Such a modulator may be used in association with an image liquid crystal display (1) to provide an autostereoscopic 3D display having a 3D mode which may track movement of an observer and a 2D mode in which full resolution of the LCD (1) is used.