Active matrix display device

Details Active matrix display device Active matrix display device

1996-02-15

1998-03-17

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349 47, 257 72, 257 66, G02F 1136, G02F 11343

Patent

active

057293082

ABSTRACT:
In an active matrix display device, a circuit including at least five thin film transistors (TFTs) which are provided with an approximately M-shaped semiconductor region for a single pixel electrode and gate lines and a capacitances line which cross the M-shaped semiconductor region, is used as a switching element. Each of the TFT have offset regions and lightly doped drain (LDD) regions. Then, by supplying a selection signal to the gate lines, the TFTs are operated, thereby writing data to the pixel, while a suitable voltage is supplied to the capacitance line, a channel is formed thereunder and it becomes a capacitor. Thus the amount of discharge from the pixel electrode is reduced by the capacitor.

REFERENCES:
patent: 4368523 (1983-01-01), Kawate
patent: 4938565 (1990-07-01), Ichikawa
patent: 5218464 (1993-06-01), Hiroki et al.
patent: 5303072 (1994-04-01), Takeda et al.
patent: 5373377 (1994-12-01), Ogawa et al.

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