Patent ID: 7106288

Claim:
A system for driving a LCD panel comprising: a buffer for sending image codes; a storage for storing the image codes; a gamma reference voltage generator for generating gamma reference voltages; a data driver for receiving the image codes and the gamma reference voltages to output driving voltages; a comparator for comparing the image codes to send to the data driver; and a controller for generating controlling signal to control the storage, the comparator, and the gamma reference voltage generator, wherein the data driver has an arrangement of the image codes and the gamma reference voltages as follows; the lowest image code corresponding to the lowest gamma reference voltage; the second lowest image code corresponding to the second lowest gamma reference voltage; the second highest image code corresponding to the second highest gamma reference voltage; the highest image code corresponding to the highest gamma reference voltage; and the other image codes arranged by LCD panel characteristics; and when the data driver receives a second highest image code in the previous frame and a highest image code in the following frame, in fast mode, the gamma reference voltage generator acts as follows: when the driving voltage is not equal to a voltage corresponding to the highest image code, a difference between a voltage of a common electrode in the LCD panel and the highest gamma reference voltage in fast mode is less than a difference between the voltage of the common electrode in the LCD panel and the highest gamma reference voltage; and when the driving voltage is equal to the voltage corresponding to the highest image code, the difference between the voltage of the common electrode in the LCD panel and the highest gamma reference voltage in fast mode is less than the difference between the voltage of the common electrode in the LCD panel and the highest gamma reference voltage.