Patent ID: 7532186
Filing Date: 2009-05-12
Classification: G09G

Abstract:
1. A circuit for driving a liquid crystal display (LCD), the circuit being adapted to receive a pixel value and drive a pixel of the LCD according to the pixel value during a frame period, the frame period being divided into a precharge field and a compensation field, the circuit comprising: a driving apparatus comprising a field controller for receiving a first synchronization signal and thereby outputting a second synchronization signal, and a mathematic unit for receiving the pixel value and determining a precharge pixel value and a compensation pixel value, and for selectively outputting one of the precharge pixel value and the compensation pixel value according to the second synchronization signal; a source driver for generating a precharge driving voltage and a compensation driving voltage according to the precharge pixel value and the compensation pixel value, respectively, so as to drive the pixel by the precharge driving voltage during the precharge field and to drive the pixel by the compensation driving voltage during the compensation field; and a frame memory for storing the pixel value and a threshold unit configured to receive the pixel value and compare the pixel value with a reference value, wherein a threshold value from the threshold unit is designated a first value to be saved in the frame memory when the pixel value is larger than the reference value, and the threshold value is designated a second value to be saved in the frame memory when the pixel value is smaller than or equal to the reference value.