Colour display device

Details Colour display device Colour display device

H - Electricity

04

N

H04N 5/74 (2006.01) G02B 27/00 (2006.01) H04N 9/31 (2006.01)

Patent

CA 2139734

A colour display device (10) incorporates three light sources (12) supplying red, green and blue light respectively. A spatial light modulator (20) is positioned to provide time varying selective blocking of light from the sources (12) under television signal control. Light passes from the sources (12) to a condenser lens (16), then through a liquid crystal display element (22) and a pro- jection lens (18) before reaching a screen (30). The display element (22) is also under television signal control. Signals supplied to the display element (22) provide for successive sets of three frames to be displayed, each set incorporating frame information to be displayed as red, green and blue and combinable to form a coloured frame When the element (22) displays a frame corre- sponding to one of the three colours red, green and blue, the modulator (20) transmits that colour and blocks the others. The screen (30) receives a colour image in which red, green and blue are displayed successively for each frame.

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