Active matrix type liquid crystal display device having non-over

Details Active matrix type liquid crystal display device having non-over Active matrix type liquid crystal display device having non-over

1997-05-21

1998-06-09

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

G02F 1136

Patent

active

057643210

ABSTRACT:
In an active matrix type liquid crystal display device which a liquid crystal is arranged between a pair of substrates, two TFTs are connected with each of the corresponding electrodes (for one pixel) formed on the substrates. The liquid crystal is driven and switched by the two TFTS. Since a voltage applied to the liquid crystal is divided by the two TFTS, a higher voltage than a withstanding voltage of a TFT is applied to the liquid crystal, so that voltages applied to the TFTs, that is, voltages applied between a source and a drain of each TFT are decreased. The voltages each has an opposite phase.

REFERENCES:
patent: 4643527 (1987-02-01), Magarino et al.
patent: 4709992 (1987-12-01), Ueno
patent: 5061040 (1991-10-01), Yaniv et al.
patent: 5148297 (1992-09-01), Ishii et al.
patent: 5337172 (1994-08-01), Lehureau

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