Liquid crystal display having electrostatic discharge damage pre

Details Liquid crystal display having electrostatic discharge damage pre Liquid crystal display having electrostatic discharge damage pre

1997-05-28

1999-08-31

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349139, 349155, 349153, G02F 1136, G02F 11339, G02F 11345

Patent

active

059460571

ABSTRACT:
In order to prevent a liquid crystal display (LCD) from being damaged by electrostatic discharge, a plurality of static voltage discharging circuits are provided within the display. The LCD includes a first and second transparent substrates provided in a manner wherein they oppose each other and are spaced apart by a predetermined distance. The first substrate has one surface on which a color filter is deposited. The color filter is entirely covered with a common electrode. The second substrate carries a plurality of pixel electrodes in matrix and a plurality of thin film transistors. Another electrode is deposited at a periphery of one surface of the second transparent substrate. A plurality of lines, for thin film transistors, including column and row lines, and are deposited on the one surface of the second transparent substrate. The plurality of lines respectively extend to the corresponding thin film transistors. The static voltage discharging circuits are respectively provided between the electrode on the periphery of the second substrate and the plurality of lines. The static voltage discharging circuit is responsive to a predetermined static voltage appearing on each of the plurality of lines.

REFERENCES:
patent: 5521728 (1996-05-01), Kodate et al.
patent: 5606340 (1997-02-01), Suzuki et al.
patent: 5657139 (1997-08-01), Hayashi
patent: 5671026 (1997-09-01), Shiraki et al.
patent: 5677745 (1997-10-01), Kawano et al.

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