Driving method of bias compensation for TFT-LCD

Details Driving method of bias compensation for TFT-LCD Driving method of bias compensation for TFT-LCD

2005-03-08

2005-03-08

Nguyen, Chanh (Department: 2675)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

Reexamination Certificate

active

06864872

ABSTRACT:
An object of the present invention is to provide a driving method of bias compensation for thin-film-transistor liquid-crystal-display (TFT-LCD) comprising the following steps: during a positive field period, applying a first low-level gate voltage to drive a gate line; wherein the first low-level gate voltage has a first waveform, the LCD voltage is fully charged at the beginning of the positive field period and partially discharged at the end of the positive field period to have a first voltage vibration amplitude; during a negative field period, applying a second low-level gate voltage to drive the gate line; wherein the second low-level gate voltage has a second waveform, the LCD voltage is fully recharged at the beginning of the negative field period and partially discharged at the end of the negative field period to have a second voltage vibration amplitude. By adjusting the first and the second waveforms, the root-mean-square of the LCD voltage during the positive field period is approximately equal to the root-mean-square of the LCD voltage during the negative field period.

REFERENCES:
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patent: 6005542 (1999-12-01), Yoon
patent: 6198464 (2001-03-01), Ota et al.
patent: 6317113 (2001-11-01), Wu

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