Colour sequential light valve display device.

摘要

A colour projection video system utilizing only a single light valve (20). A white light source is separated into red, green and blue bands. Scanning optics (14 )in the form of three prisms coaxially mounted for rotation cause the RGB bands to be sequentially scanned across a light valve (20), such as a transmission LCD panel. Prior to each colour passing over a given row of panels on the light valve, that row will be addressed, by the display electronics (60) with the appropriate colour content of that portion of the image which is being displayed. The image is projected by a projection lens (22) onto a viewing surface, such as a screen. The sequence of light bands occurs so quickly as to give the viewer an appearance of simultaneous full colour.