Patent ID: 8866712

Claim:
An apparatus for use in a liquid crystal display (LCD), the apparatus 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 apparatus comprising: a field controller for receiving a first synchronization signal and thereby outputting a second synchronization signal; a frame memory for receiving a pixel value; a calculation and expand unit configured to receive the pixel value from the frame memory and output a precharge pixel value and a compensation pixel value to the frame memory, the calculation and expand unit generating the precharge pixel value and the compensation pixel value according to the pixel value stored in the frame memory and an overdrive compensation value; an overdrive compensation unit configured to provide the overdrive compensation value according to the pixel value, the precharge pixel value, and the compensation pixel value stored in the frame memory; a multiplexer for selectively outputting either the precharge pixel value or the compensation pixel value according to the second synchronization signal derived from the first synchronization signal; and 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.