Liquid crystal display having orientation control electrodes for

Details Liquid crystal display having orientation control electrodes for Liquid crystal display having orientation control electrodes for

1994-06-21

1997-03-04

Crane, Sara W.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 42, 349116, 349123, G02F 11343, G02F 1135, G02F 11337

Patent

active

056085567

ABSTRACT:
In a liquid crystal display of TFT active matrix type, the direction of orientation vectors of liquid crystal molecules are controlled for providing a wide viewing angle and preventing occurrence of disclination from making a rough display screen. With an orientation control electrode disposed on the periphery of a display electrode, an orientation control window, an electrode nonexistent portion, is formed in a common electrode and the potential difference between the orientation control electrode and the common electrode is set smaller than that between the display electrode and the common electrode. Alternatively, an orientation control window is likewise formed in the display electrode and the potential difference between the orientation control electrode, and the common electrode is set larger than that between the display electrode and the common electrode.

REFERENCES:
patent: 4759610 (1988-07-01), Yanagisawa
patent: 5042918 (1991-08-01), Suzuki
patent: 5321535 (1994-06-01), Ukai et al.
patent: 5339181 (1994-08-01), Kim et al.
patent: 5345324 (1994-09-01), Koseki et al.
patent: 5475517 (1995-12-01), Konuma et al.
Lien, A., et al., "Multi-domain homeotropic liquid crystal display for active matrix application", IBM Researh Division, Yorktown Heights, N.Y., pp. 21-24.

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