Method for driving active matris liquid crystal display panel

Details Method for driving active matris liquid crystal display panel Method for driving active matris liquid crystal display panel

1994-03-23

1996-06-11

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 94, G02F 133

Patent

active

055260128

ABSTRACT:
In a method for driving an active matrix liquid crystal display panel, a selection signal composed of a scan signal superimposed with a modulation signal is sequentially supplied to the scan signal lines one by one, so as to turn on the thin film transistors connected to the scan signal line applied with the selection signal so that a video signal is applied from each of the video signal lines through the associated turned-on thin film transistor to the corresponding pixel electrode and stored in the corresponding storage capacitor, whereby an image is displayed. The selection signal is configured to assume a first potential which is a high voltage, a second potential which is lower than the first potential, and a third potential which is lower than the second potential. The selection signal is controlled in a given frame to elevate from the second potential to the first potential so that the selection signal is maintained at the first potential during one horizontal scan period, and then, to drop to the third potential so that the selection signal is maintained at the first potential during two horizontal scan periods, and thereafter, to return to the second potential so that the selection signal is maintained at the second potential until a next frame.

REFERENCES:
patent: 4818991 (1989-04-01), Gay
patent: 4955697 (1990-09-01), Tsukada et al.
patent: 5177475 (1993-01-01), Stephany et al.
patent: 5296847 (1994-03-01), Takeda et al.

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