Color liquid crystal display device with peripheral pixels in a

Details Color liquid crystal display device with peripheral pixels in a Color liquid crystal display device with peripheral pixels in a

1994-08-09

1997-04-01

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349108, 349143, G02F 11333, G02F 11335, G02F 11343

Patent

active

056172303

ABSTRACT:
A color liquid crystal display device comprising light shielding layers and color filters on the inner surface of a cell, wherein similar light shielding layers and color filters are disposed also in a peripheral region outside of a display region which is equipped with groups of striped row and column electrodes opposed mutually to form pixels for display. The respective patterns of the light shielding layers and the color filters are the same in both the display region and the peripheral region. A liquid crystal layer formed in the display device has a twist angle of 160.degree. to 300.degree., and a retardation compensator composed of a film is superposed on such layer so as to compensate the elliptical polarization. And a non-selective voltage is applied continuously to the scanning electrodes in the peripheral region so as to maintain the peripheral pixels in a light-shielded state, thereby rendering the display easier to be seen. Furthermore, due to overlaps of the color filters and the light shielding layers in both the display region and the peripheral region, the gap between the substrates is retained substantially uniform to minimize the nonuniformity of the backgroud color.

REFERENCES:
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patent: 4828364 (1989-05-01), Saito et al.
patent: 4924243 (1990-05-01), Sato et al.
patent: 4927493 (1990-05-01), Yamazaki et al.
patent: 4964702 (1990-10-01), Sugimoto et al.
patent: 4974939 (1990-12-01), Yamazaki et al.
patent: 4975145 (1990-12-01), Yamazaki et al.
Nikkei Microdevices (Oct., 1987), pp. 84-89. (with partial translation).

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