Single layer multi-state ultra-fast cholesteric liquid crystal device and the fabrication methods thereof
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United States of America Patent
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Jan 6, 2004
Grant Date -
N/A
app pub date -
Oct 1, 2001
filing date -
Sep 29, 2000
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Abstract
A device and method of manufacturing a single layer multi-state ultra-fast cholesteric liquid crystal includes two optically transparent states with a liquid crystal arranged therebetween, and changing the optical states of the liquid crystal ranging from one state to any combination of broadband reflection, tunable narrow band reflection, light scattering, and transparency in accordance with a voltage applied to the device. A surfactant can be added to reduce the response time and a dichroic dye may be added to include the property of light absorption and reduce the bandwidth. The device can provide any and all of the aforementioned optical states for infrared light, visible light, and ultra-violet light. The desired outputs can be formed according to need, so that predetermined optical states can operate with either no voltage or a particular voltage or voltage range.
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