Liquid crystal display unit

Details Liquid crystal display unit Liquid crystal display unit

1989-12-20

1991-08-20

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340719, 359 59, G09G 336

Patent

active

050418220

ABSTRACT:
A liquid crystal display unit includes a matrix array of pixels composed of liquid crystal cells and switching transistors connected to a horizontal scanner for horizontal scanning of the pixels and to a vertical scanner for vertical scanning of the pixels. Clock pulse input circuits feed clock pulse signals to the scanners and start pulse input circuits feed start pulse signals to the scanners. Electrostatic breakdown of the display unit is prevented by a capacitive element having a load substantially equal to the load on the clock pulse input circuits which is connected to each of the start pulse input circuits to prevent buildup of potential differences between the circuits. In one embodiment, the capacitive elements are reference cells consisting of liquid crystal display cells formed by two mutually opposed electrodes between which is sealed a liquid crystal material.

REFERENCES:
patent: 4728175 (1988-03-01), Baron
patent: 4818072 (1989-04-01), Mohebban
patent: 4839634 (1989-06-01), More et al.
patent: 4840462 (1989-06-01), Hartmann
patent: 4899141 (1990-02-01), Morozumi et al.
patent: 4955697 (1990-09-01), Tsukada et al.
patent: 4962413 (1990-10-01), Yamazaki et al.
patent: 4981340 (1991-01-01), Kurematsu et al.

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