Illumination system for a display using cholesteric liquid crystal reflectors
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United States of America Patent
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Jul 30, 1996
Grant Date -
N/A
app pub date -
Jan 25, 1994
filing date -
Jan 25, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A display system for direct viewing or projection includes a source of polarized light, an analyzer for reflecting or transmitting light as a function of the wavelength and polarization characteristic of incident light, and a display receiving light from said analyzer, the display being operable selectively to change a polarization characteristic of incident light, and light from the display being directed to the analyzer for reflection or transmission thereby. A method of display includes providing a source of polarized light, analyzing polarized light by selectively reflecting or transmitting light as a function of the wavelength and polarization characteristic of incident light, and creating a desired light pattern from light received from said analyzing step by selectively changing a polarization characteristic of incident light, and selectively transmitting light according to such pattern.
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