Liquid crystal display

Details Liquid crystal display Liquid crystal display

Filed on

1995-04-14

Date issued

1997-07-22

Examiner

Hjerpe, Richard

Patent Class

Computer graphics processing and selective visual display system

SubClass

Plural physical display element control system

SubSubClass

Display elements arranged in matrix

Other Related Categories

345 94, G09G 336

Type

Patent

Status

active

Patent number

056507976

Description

ABSTRACT:
A ferroelectric liquid crystal display is provided with a scanning electrode group and a signal electrode group arranged in matrix and a displaying portion between these electrode groups filled with ferroelectric liquid crystal which exhibits bistable optical transmittance in accordance with an applied electric field. Driving signals for the display are formed by a pulse to completely reset all the pixels on a selected scanning electrode to one stable condition and a plurality of subsequent pulses, having opposite polarities to each other, to determine the content to be written into a pixel. The pixel width of each subsequent pulse is shorter than the pulse width of the preceding pulses.

REFERENCES:
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patent: 4712877 (1987-12-01), Okada et al.
patent: 4898456 (1990-02-01), Okada et al.
patent: 4902107 (1990-02-01), Tsuboyama et al.
patent: 4941736 (1990-07-01), Taniguchi et al.
patent: 5026144 (1991-06-01), Taniguchi et al.
patent: 5034735 (1991-07-01), Inoue et al.
patent: 5061044 (1991-10-01), Matsunaga
patent: 5128663 (1992-07-01), Coulson
patent: 5153755 (1992-10-01), Higa
patent: 5521727 (1996-05-01), Inaba et al.
Mol. Crys. Liq. Crys. vol. 94, No. 1 and 2, 1983, Clark et al., pp. 213-234, "Ferroelectric Liquid Crystal Electro-Optic Using the Surface Stabilized Structure".

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