Color filter
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United States of America Patent
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-
Nov 22, 1983
Grant Date -
N/A
app pub date -
Nov 10, 1980
filing date -
Nov 10, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable color filter comprising a plurality of differently colored diochroic polarizers, an equal number of voltage responsive twisted nematic liquid crystal cells, and a plane polarizer all arranged along an optical path in a predetermined manner to modify the spectral content of visible light incident to the filter so that the filter transmits any one of a predetermined number of colors whose saturation and hue are related to the voltages applied to the liquid crystal cells.
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