Liquid crystal display device having dummy electrodes with inter

Details Liquid crystal display device having dummy electrodes with inter Liquid crystal display device having dummy electrodes with inter

1997-08-15

1999-11-09

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349143, 349139, 349152, G02F 11339, G02F 11343

Patent

active

059824700

ABSTRACT:
A liquid crystal display device includes a pair of substrates having a plurality of display-use electrodes formed thereon, a seal for connecting the pair of substrates in such a manner that respective electrode forming surfaces face each other, a liquid crystal layer formed by sealing a liquid crystal in a space surrounded by the pair of substrates and the seal, and dummy electrodes for achieving a uniform thickness of the liquid crystal layer in the display area. The display-use electrodes and the dummy electrodes are interleaved on four sides of the seal, and an absolute value for variations in interleaved ratio in the four sides, indicative of a ratio of an area occupied by the display-use electrodes and the dummy electrodes on the seal is not more than a predetermined value. As this permits a uniform thickness of the seal on the four sides, a difference in brightness between a central portion and a portion in a vicinity of the seal in the display area can be eliminated, thereby improving a display quality.

REFERENCES:
patent: 5396356 (1995-03-01), Fukuchi et al.
patent: 5406398 (1995-04-01), Suzuki et al.
patent: 5406561 (1995-04-01), Suzuki et al.
patent: 5488498 (1996-01-01), Fujii et al.
patent: 5619358 (1997-04-01), Tanaka et al.
patent: 5757450 (1998-05-01), Fujii et al.
Published unexamined patent application, Tokukaisho 62-229234 Oct. 8, 1987.
Published unexamined patent application, Tokukaihei 3-211524, Sep. 17, 1991.
Published unexamined patent application, Tokukaihei 6-51332, Feb. 25, 1994.
Published unexamined utility model application, Jitsukaihei 1-85779, Jun. 7, 1989.

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