Field sequential color illumination system for liquid crystal display
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United States of America Patent
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Jun 27, 1995
Issued Date -
N/A
app pub date -
Mar 1, 1993
filing date -
Sep 9, 1992
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Abstract
A field sequential color illumination system for liquid crystal displays is described which focuses light from a plurality of small point like or line like light sources into subregions of pixels of an LCD by a fly's eye lens, in such a manner that at any given time, red, blue, and green light spots are focused simultaneously into different pixels. Furthermore, during each subsequent field, light spots are focused into different sub sections of each pixel in such a way that each pixel receives red, green, and blue illumination sequentially during each set of three fields. During each field, each pixel is addressed and made to display the appropriate transmittance level to display the appropriate red, green, or blue color level for its location on the red, blue, or green color component of the image just prior to illumination of a sub region by a red, green, or blue light source.
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