Liquid crystal panel having a high aperture ratio and light-shie

Details Liquid crystal panel having a high aperture ratio and light-shie Liquid crystal panel having a high aperture ratio and light-shie

1997-05-22

2000-10-24

Dudek, James A.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349110, 349106, G02F 1136, G02F 11333, G02F 11335

Patent

active

061375527

ABSTRACT:
An objective of this invention is to provide a display improved in its brightness by increasing its aperture ratio while preventing a malfunction of TFTs due to incidence of rays from an external light on a back channel of the TFTs. This invention provides a liquid-crystal panel comprising (a) a thin-film transistor substrate comprising a transparent insulating substrate on which thin-film transistors and pixel electrodes are formed, (b) a counter substrate comprising a transparent insulating substrate on which a counter electrode is formed, and (c) a liquid crystal material sandwiched between the thin-film transistor substrate and the counter substrate, wherein each of the pixels partitioned with a plurality of scanning lines and a plurality of signal lines orthogonal to the scanning lines comprises at least one of the thin-film transistors and the pixel electrodes controlled by the thin-film transistors, characterized in that each pixel comprises a color-filter layer formed on the insulating substrate; a light-shielding film made of metal formed on the color-filter layer, covering a channel between source and drain electrodes of the thin-film transistor; and the pixel electrode formed on the color-filter layer covering the whole surface of the pixel area.

REFERENCES:
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patent: 5585951 (1996-12-01), Noda et al.
patent: 5631753 (1997-05-01), Hamaguchi et al.
patent: 5721599 (1998-02-01), Cheng
patent: 5754261 (1998-05-01), Lyu
patent: 5847792 (1998-12-01), Kobayashi et al.

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