HIGH-CONTRAST AND BISTABLE SCATTERING MODE LIQUID CRYSTAL LIGHT SHUTTERS

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	CHENG KO-TING, QASIM MALIK MUHAMMAD, WILKINSON TIMOTHY DAVID, LEE PO-YI
Format:	Patent
Sprache:	eng
Schlagworte:	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	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.