Patent ID: 8860704

Claim:
A power driver comprising a plurality of boosters and a plurality of amplifiers, the power driver being configured to apply a voltage for driving a display apparatus, wherein the plurality of boosters comprises a first booster, a second booster receiving a voltage output by the first booster, and a third booster receiving a voltage output by the second booster, wherein the plurality of amplifiers comprises: a first amplifier, a second amplifier, and a third amplifier coupled to output terminals of the first through third boosters, respectively; and a plurality of gamma amplifiers, wherein the plurality of boosters are configured to receive an input voltage and convert the input voltage to different voltages respectively, and the plurality of amplifiers are configured to receive one of the converted voltages from corresponding boosters and generate gamma reference voltages for gamma voltages corresponding to gray level data and panel voltages, when the display apparatus is in a normal display mode, and wherein the power driver is configured to turn off the plurality of amplifiers, and output gamma voltages corresponding to a smallest gray level data and a largest gray level data and panel voltages without using the plurality of amplifiers, when the display apparatus is in a standby mode.