Patent ID: 7292219

Claim:
A data driver for a display having a first pixel and a second pixel, the data driver receiving a first pixel data and a second pixel data, both of the first pixel data and the second pixel data having K bits where K is a positive integer, the data driver comprising: a first main digital-to-analog current converter for converting N bits of the first pixel data into a first main output current where N is a positive integer; a second main digital-to-analog current converter for converting N bits of the second pixel data into a second main output current; a first main voltage storing current copier/current mirror for outputting a first main regenerating current according to the first main output current; a second main voltage storing current copier/current mirror for outputting a second main regenerating current according to the second main output current; a secondary digital-to-analog current converter for receiving M bits from the first pixel data and M bits from the second pixel data to generate a first secondary output current and a second secondary output current correspondingly where M is a positive integer; a first secondary voltage storing current copier/current mirror for outputting a first secondary regenerating current according to the first secondary output current; and a second secondary voltage storing current copier/current mirror for outputting a second secondary regenerating current according to the second secondary output current; whereby brightness of the first pixel is determined by the sum of the first main regenerating current and the first secondary regenerating current, and brightness of the second pixel is determined by the sum of the second main regenerating current and the second secondary regenerating current.