LCD device having coupling capacitances and shielding films

Details LCD device having coupling capacitances and shielding films LCD device having coupling capacitances and shielding films

1997-07-11

1999-10-12

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 44, 349 39, G02F 11333

Patent

active

059661933

ABSTRACT:
This invention is characterized by providing light shield patterning on a TFT substrate for an active matrix type liquid crystal display device. A liquid crystal display device comprising an active matrix circuit using a TFT having a top gate-type structure. The light-shield film are formed under a semiconductor layer and superposed at least one of the source bus line and the gate bus line. A capacitance is formed by the light-shield film and at least a part of the semiconductor layer with an insulating layer interposed therebetween.

REFERENCES:
patent: 4759610 (1988-07-01), Yanagisawa
patent: 4948231 (1990-08-01), Aoki et al.
patent: 4984033 (1991-01-01), Ishizu et al.
patent: 5121236 (1992-06-01), Ukai et al.

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