Patent ID: 8384650

Claim:
A method for providing reference voltages corresponding to a plurality of gamma curves to a column driver that is used to drive a display, the method comprising: (a) during a first period of time, (a.i) writing digital data into a first plurality of multi-bit registers while digital data in a second plurality of multi-bit registers is converted to a plurality of analog voltages that correspond to a gamma curve by a digital-to-analog converter (DAC) and stored in a first group of voltage storage devices, and (a.ii) simultaneously outputting buffered versions of the plurality of analog voltages stored in the first group of voltage storage devices so that the buffered versions of the plurality of analog voltages are all simultaneously available, as reference voltages that correspond to the gamma curve, to the column driver that is used to drive the display; and (b) during a second period of time that follows the first period of time, (b.i) writing further digital data into the second plurality of multi-bit registers while digital data in the first plurality of multi-bit registers is converted to a further plurality of analog voltages that correspond to a further gamma curve by the same DAC and stored in a second group of voltage storage devices, and (b.ii) simultaneously outputting buffered versions of the further plurality of analog voltages stored in the second group of voltage storage devices so that the buffered versions of the plurality of analog voltages are all simultaneously available, as further reference voltages that correspond to the further gamma curve, to the column driver that is used to drive the display.