Liquid crystal display device for improved halftone display

Details Liquid crystal display device for improved halftone display Liquid crystal display device for improved halftone display

1994-12-21

1997-06-10

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 37, G02F 11343

Patent

active

056381956

ABSTRACT:
A display device is constituted by a pair of oppositely disposed substrates spaced from each other and having thereon scanning electrodes and data electrodes intersecting the scanning electrodes, respectively, and a layer of optical modulation substance, e.g., a liquid crystal disposed between the substrates so as to form a pixel at each intersection of the scanning electrodes and data electrodes and so that a white display region and a black display region can be formed at a varying areal ratio therebetween in each pixel. In the device, a site forming a nucleus of a black display region in one pixel and a site forming a nucleus of a white display region in another pixel adjacent to said one pixel are disposed to be adjacent to each other. As a result, a halftone display can be effected according to the areal method using a cell having a simple thickness gradient while avoiding appearance of ugly continuous lines diminishing a halftone display effect. The device is also suitable for a temperature compensation according to the pixel shift method.

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