Reflective color light filter and method of manufacture
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United States of America Patent
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Nov 30, 1993
Issued Date -
N/A
app pub date -
May 19, 1992
filing date -
Sep 28, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A color matrix display including a color matrix reflective filter (10) having groups of reflective red, green and blue (R, G, B) color elements (12) arranged in subgroups (20). The elements (12) of each color group (R, B, G) in each subgroup (20) are aligned with pixel subgroups of a matrix control element or LCD (18). The color elements (12) of the reflective filter transmit light (26) of their associated color to an aligned pixel associated with that color and reflect back (30) light of other colors to a reflective light assembly (16) for reuse. The color matrix reflective filter (10) is made by selectively exposing selected areas of a holographic optical element, or HOE, with a light of colors other than the color desired to be transmitted by that element (12) of that selected area.
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