Patent ID: 10019960

Abstract:
Provided are a method and apparatus for determining driving voltages, when a high driving voltage and a low driving voltage of a TFT-LCD are set for each gray scale, an average of the high driving voltage and the low driving voltage of the gray scale are determined at first according to a voltage jump of a pixel electrode in the TFT-LCD for the gray scale, and then the high driving voltage and the low driving voltage of the TFT-LCD are set according to the average, a relationship curve between driving voltages of a source driving integrated circuit and light transmittances of the TFT-LCD, and a Gamma curve of the TFT-LCD. Because the average of the high driving voltage and the low driving voltage are determined according to the voltage jump of the pixel electrode in the TFT-LCD, a phenomenon of asymmetry in the driving voltages caused when the voltage jump of the pixel electrode is different from a difference between the average of the high driving voltage and the low driving voltage and a reference voltage Vcom of the TFT-LCD would not occur, so that a image sticking problem due to a shift of the voltage jump of the pixel electrode in the TFT-LCD is avoided.