Optical display including a cholesteric layer, a display device and a diffusing layer on an exit side of the cholesteric layer
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United States of America Patent
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Apr 18, 2006
Grant Date -
Dec 5, 2002
app pub date -
May 29, 2002
filing date -
Jun 1, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A wavelength-selecting optical element includes a cholesteric layer that reflects or transmits either of a right-handed circularly polarized light component and a left-handed circularly polarized light component in a selected wavelength band of an incident light; and a diffusing layer disposed on the exit side of the cholesteric layer to diffuse the circularly polarized light component reflected or transmitted by the cholesteric layer. The cholesteric layer may be a color filter having a red, a green and a blue pixel region for each of pixels. Each of the pixel regions reflects or transmits either of a right-handed circularly polarized light component and a left-handed circularly polarized light component in a selected wavelength band of an incident light.
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