Active matrix substrate with the double layered structure

Details Active matrix substrate with the double layered structure Active matrix substrate with the double layered structure

1997-06-17

1999-09-21

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349111, 349138, G02F 11333

Patent

active

059561033

ABSTRACT:
An active matrix substrate including: pixel electrodes provided in a matrix; a TFT composed essentially of a semiconductor layer; a scanning signal line; a data signal line; a conductive light-shielding film formed on a substrate; a first insulating film formed on the substrate so as to cover the conductive light-shielding film; a thin semiconductor film formed on the first insulating film, the thin semiconductor film being formed of the same material as the semiconductor layer composing the TFT; a second insulating film formed on the first insulating film so as to cover the thin semiconductor film; and a storage capacitance electrode formed on the second insulating film. The storage capacitance electrode is a thin metal film formed of the same material as the scanning signal line. The storage capacitance electrode is electrically coupled to the conductive light-shielding film. A first storage capacitance is formed between the conductive light-shielding film and the thin semiconductor film. A second storage capacitance is formed between the storage capacitance electrode and the thin semiconductor film. The storage capacitance electrode at least partially overlaps the data signal line.

REFERENCES:
patent: 4948231 (1990-08-01), Aoki et al.
patent: 5412494 (1995-05-01), Ishiwata et al.
patent: 5734449 (1998-03-01), Jang
patent: 5744821 (1998-04-01), Song
patent: 5777701 (1998-07-01), Zhang
patent: 5815226 (1998-09-01), Yamazaki et al.

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