A multicolor liquid crystal display

Amulticolor display (300) which comprises a high contrast liquid crystal device (320), light source (314) and a luminance-balanced color mask (318). The liquid crystal device is the transmissive, twisted nematic type having high extinction ratio polarizers on the input and output sides and functions...

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Bibliographische Detailangaben
1. Verfasser:	DIR, GARY A
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:	Amulticolor display (300) which comprises a high contrast liquid crystal device (320), light source (314) and a luminance-balanced color mask (318). The liquid crystal device is the transmissive, twisted nematic type having high extinction ratio polarizers on the input and output sides and functions as a light shutter for the display. The liquid crystal material has a dichroic dye admixed therein to prevent build- up of the contrast limiting orthogonal mode electric vector of polarized light. The color mask contains different colored patches with gray surrounds, and the colored patches are luminance balanced in order that the different colored data displays are of substantially equal brightness. During the off-state there is no light bleed through so that the display presents a uniformly dark state or dead front.