Vertically aligned liquid crystal display

Disclosed is a vertically aligned liquid crystal display (VA-LCD) having wider viewing angle and having high contrast at the right angle and tilt angles. According to one embodiment of the present invention, the VA-LCD having liquid crystal cells in which liquid crystals with a negative dielectric a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	JANG SOO-JIN,JEON BYOUNG-KUN,BELYAEV SERGEY,CHANGJUN-WON
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:	Disclosed is a vertically aligned liquid crystal display (VA-LCD) having wider viewing angle and having high contrast at the right angle and tilt angles. According to one embodiment of the present invention, the VA-LCD having liquid crystal cells in which liquid crystals with a negative dielectric anisotropy are filled and which is provided between a first polarizer and a second polarizer, whose absorption axises are perpendicular to each other, includes a sheet of +A plate and a sheet of -C plate, disposed between the first polarizer and the liquid crystal cells; and a sheet of +A plate disposed between the second polarizer and the liquid crystal cells, wherein an optical axis of the +A plate near the first polarizer is perpendicular to the absorption axis of the first polarizer, and an optical axis of the +A plate near the second polarizer is perpendicular to the absorption axis of the second polarizer. According to another embodiment of the present invention, a VA-LCD having liquid crystal cells in which liquid crystals with a negative dielectric anisotropy are filled and which are disposed between a first polarizer and a second polarizer, whose absorption axises are perpendicular to each other, includes a bi-axial retardation film disposed between the first polarizer and the liquid crystal cells, and a sheet of +A plate disposed between the second polarizer and the liquid crystal cells, wherein an optical axis of the bi-axial retardation film near the first polarizer is perpendicular to the absorption axis of the first polarizer, and an optical axis of the +A plate is parallel with the absorption axis of the second polarizer.