The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2005
Filed:
Apr. 22, 2002
Chien-sheng Yang, Taipei, TW;
Chien-Sheng Yang, Taipei, TW;
AU Optronics Corp, Hsinchu, TW;
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.