Active matrix device with two TFT's per pixel driven by a third

Details Active matrix device with two TFT's per pixel driven by a third Active matrix device with two TFT's per pixel driven by a third

1997-11-26

2000-02-08

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349 48, 349149, G02F 1136, G02F 11345

Patent

active

060233087

ABSTRACT:
An active matrix device comprising a two signal lines (V.sub.D and V.sub.G) formed over a substrate. The first signal line is connected to the gate (G1) of a first thin film transistor (Tr1) with a crystalline silicon channel. The second signal line is connected to the drain (D1) of the first thin film transistor. The source (S1) of the first thin film transistor is connected to the gate (G2) of a second thin film transistor (Tr2) with a crystalline silicon channel. A voltage supply line (V.sub.LC) is connected to a drain (D2) of the second thin film transistor and a pixel electrode is connected to the source (S2) of the second thin film transistor. A driving circuit formed for driving the thin film transistors comprises a third film transistor (Tr3) with a crystalline silicon channel. Preferably, the channel width of the second thin film transistor is greater than the channel width of the first thin film transistor.

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patent: 5349366 (1994-09-01), Yamazaki et al.
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IBM Technical Disclosure Bulletin, vol. 24, No. 7B (Dec. 1981) pp. 3678-3680, "AC Drive Circuit for an Integrated Liquid Crystal-Silicon Display".

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