HIGH-CONTRAST AND BISTABLE SCATTERING MODE LIQUID CRYSTAL LIGHT SHUTTERS
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United States of America Patent
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Issued Date -
Oct 13, 2016
app pub date -
Apr 9, 2015
filing date -
Apr 9, 2015
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a high-contrast and bistable scattering mode liquid crystal light shutter. The shutter comprises two substrates; two transparent electrode layers, arranged between two substrates and respectively contacted with each corresponding substrate; an intermediate layer, interposed between two transparent electrode layers, the intermediate layer includes a plurality of spacers and a plurality of azo-liquid-crystal-doped cholesteric liquid crystals doped with nematic liquid crystals and chiral azobenzene dopants; and two vertical alignment films, respectively coated between each transparent electrode layer and the intermediate layer; wherein a transmittance of the azo-liquid-crystal-doped cholesteric liquid crystals is changed after applying external voltage with different frequencies to the two transparent electrode layers to change the structure of the azo-liquid-crystal-doped cholesteric liquid crystals, and the azo-liquid-crystal-doped cholesteric liquid crystals are kept in a scattering mode or a transparent mode to reduce the energy consumption after removing the external voltage.
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