Image display device

Details Image display device Image display device

2007-04-10

2007-04-10

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Intensity or color driving control

C345S089000

Reexamination Certificate

active

10790813

ABSTRACT:
An image display device is capable of preventing the occurrence of flickers on a display screen by automatically adjusting a common voltage applied to common electrodes without providing light receiving elements. A plurality of dummy pixels which are arranged in the periphery of an image display part include pixel electrodes. A potential difference is detected between a voltage of the pixel electrodes of the dummy pixels to which a gray scale voltage of positive polarity is written and a common voltage applied to the common electrodes, a potential difference is detected between a voltage of the pixel electrodes of the dummy pixels to which a gray scale voltage of negative polarity is written and the common voltage, and the common electrodes are controlled so as to make the first potential difference and the second potential difference equal to each other.

REFERENCES:
patent: 2002/0180673 (2002-12-01), Tsuda et al.
patent: 2002/0186192 (2002-12-01), Maruoka et al.
patent: 2003/0107698 (2003-06-01), Nagayama et al.

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