Patent ID: 7719493

Claim:
A data driving circuit, used to drive at least a display device and connected to said display device via a plurality of pixel circuits and data lines, comprising: a digital-to-analog current converter for receiving a digital signal and further converting the digital signal into an analog current; a reset circuit directly connected to an output terminal of said digital-to-analog current converter to reset a potential of said output terminal of said digital-to-analog current converter to a specific gray scale potential; and plural stages of data driver units, connected to said digital-to-analog current converter and said reset circuit, for driving a plurality of said data lines of said display device, and each of the stages further comprising: a plurality of sample-holding circuits used to copy or refresh current signals to said data lines; and a plurality of sample-holding switches, connected to said digital-to-analog current converter and said sample- holding circuits, for controlling switching of said data driver units in storing or refreshing said analog current, wherein said reset circuit is electrically connected between said digital-to-analog current converter and said data driver units.