Liquid crystal display device with control capacitors for gray s

Details Liquid crystal display device with control capacitors for gray s Liquid crystal display device with control capacitors for gray s

1993-05-27

1994-06-14

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 59, 359 79, 359 87, 345 89, G02F 1133, G09G 336

Patent

active

053215354

ABSTRACT:
Each pixel electrode of a liquid crystal display device is divided into a plurality of subpixel electrodes, which are separated by a gap from each other, and a control capacitor electrode is provided opposite at least one of the subpixel electrodes through a first insulating film. The control capacitor electrode has a region extending the entire length of the gap so that a drive voltage can be applied to liquid crystal in the gap. The control capacitor electrode forms a control capacitor connected in series with a liquid crystal capacitor formed by the at least one subpixel electrode between it and a common electrode corresponding thereto. An additional capacitor electrode, which is opposite the at least one subpixel electrode through a second insulating film, is formed, by which is formed an additional capacitor equivalently in parallel to the liquid crystal capacitor.

REFERENCES:
patent: 4840460 (1989-06-01), Bernot et al.
patent: 5124695 (1992-06-01), Green
patent: 5126865 (1992-06-01), Sarma
patent: 5191452 (1993-03-01), Sarma
"Thin Film Transistor For Gray Scale LCD" IBM-Technical Disclosure Bulletin--vol. 33-No. 1A-Jun. 1990-pp.481-482.
Sarma et al "Active Matriz LCD Using Gray-Scale in Halftone Methods" SID 89 Digest-May 1989-pp. 148-150.
Patent Abstracts of Japan-vol. 13-No. 157 (P857)-Apr. 1989-JP A 63-316025.
Patent Abstracts of Japan-vol. 9-No. 129 (P361) (1852)-Jun. 1985-JP A 60-014219.

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