Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1998-07-22
2000-07-04
Parker, Kenneth
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349117, G02F 1141, G02F 11335
Patent
active
060846526
ABSTRACT:
The present invention has an object to eliminate viewing angle dependency in the upward, downward, and right- and left-hand directions, and compensate for optical retardation according to the viewing angle. The liquid crystal display device is provided with at least one optical retardation compensator plate inserted between a liquid crystal display element and polarizer plates. The liquid crystal display element is composed of a pair of electrode substrates and a liquid crystal layer sealed therebetween. The polarizer plates flank the liquid crystal display element. The optical retardation compensator plate has a negative refractive index anisotropy and an inclining refractive index ellipsoid. The liquid crystal layer is divided unequally into divisions having mutually different orientation directions, and the pretilt angle formed by the orientation films and the major axes of liquid crystal molecules in the liquid crystal layer is set within such a range that tone reversion does not occur in the opposite viewing direction when halftone is being displayed by applying to the liquid crystal a voltage that is close to the threshold voltage for the liquid crystal.
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Mizushima Shigeaki
Yamahara Motohiro
Conlin David G.
Eisenhut Heidi L.
Manus Peter J.
Parker Kenneth
Sharp Kabushiki Kaisha
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