Patent ID: 7605806

Claim:
A data driving system for driving a panel, comprising: a gamma voltage supply for producing a plurality of gamma voltages; and a D/A converter for receiving the gamma voltages, a first pixel value and a second pixel value, and converting each of the first pixel value and the second pixel value to a corresponding one of the gamma voltages; wherein the gamma voltages have a first polarity offset when the D/A converter converts the first pixel value, and the gamma voltages have a second polarity offset when the D/A converter converts the second pixel value, and wherein the gamma voltage supply comprises a plurality of chopper operational amplifiers, via which a plurality of reference voltages are received respectively and thereby the gamma voltages are produced, and each chopper operational amplifier is operated in a first state when the D/A converter converts the first pixel value, so that the gamma voltages have the first polarity offset, and each chopper operational amplifier is operated in a second state when the D/A converter converts the second pixel value, so that the gamma voltages have the second polarity offset.