Active matrix LCD apparatus with compensating capacitor having a

Details Active matrix LCD apparatus with compensating capacitor having a Active matrix LCD apparatus with compensating capacitor having a

1995-06-28

1998-04-28

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349 39, 349 44, G02F 11343, G02F 1136

Patent

active

057451940

ABSTRACT:
In an active matrix liquid-crystal display apparatus, in order to increase display quality, compensator capacitance is provided to compensate pixel voltage fluctuation resulted from increase of parasitic capacitance caused by light shield film. A capacitance film is fabricated between a pixel electrode and the adjacent image signal line to provide compensator capacitance. Signals are supplied to each image signal line that a positive electric voltage and a negative electric voltage are applied to the liquid-crystal layer of the adjacent pixels along the scan signal line, alternately from pixels to pixels. The compensator capacitance is set to approximately the same as parasitic capacitance caused by the light shield film so that modulation noise caused by the light shield film is offset by modulation noise caused by the compensator capacitance when the adjacent image signal line is in opposite phase. Thus the voltage fluctuation of the pixel electrode can be compensated.

REFERENCES:
patent: 5151806 (1992-09-01), Kawamoto et al.
patent: 5285302 (1994-02-01), Wu
patent: 5528395 (1996-06-01), So
Patent Abstracts of Japan, vol. 013, No. 093 (P-838), Mar. 6, 1989.

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