Bistable twisted nematic lcd

This invention relates to a bistable twisted nematic LCD cell (1), comprising front (2) and rear (6) polarizers, substrates (3 & 5) and a liquid crystal layer (4) between the substrates. The front rubbing direction (7) and the rear rubbing direction (8) are arranged to give an initial twist angl...

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Bibliographische Detailangaben
Hauptverfasser:	YEUNG, STEVEN WAI LEUNG, CHANG, CELENE, KWOK, SIU KWAN
Format:	Patent
Sprache:	eng ; fre ; ger
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:	This invention relates to a bistable twisted nematic LCD cell (1), comprising front (2) and rear (6) polarizers, substrates (3 & 5) and a liquid crystal layer (4) between the substrates. The front rubbing direction (7) and the rear rubbing direction (8) are arranged to give an initial twist angle (9) of the liquid crystal. The configuration of the cell is such that the twist angle is not 180 degrees or a multiple of 90 degrees, and the angle between the polarizers is not 90 degrees.