Patent ID: 8749536

Claim:
A source driver adapted to drive a display panel, the source driver comprising: an output buffer comprising a first terminal for outputting a plurality of drive voltages to drive the display panel, a second terminal for outputting a first control signal, and a third terminal for outputting a second control signal; a first switch connected between the first terminal and the display panel; an electrostatic discharge protection resistor directly connected in series between the first switch and the display panel; a second switch; a first transistor comprising a first electrode connected to the second terminal via the second switch, a second electrode connected to a first power supply, and a third electrode connected between the first switch and the display panel; a third switch; and a second transistor comprising a fourth electrode connected to the third terminal via the third switch, a fifth electrode connected to a second power supply, and a sixth electrode connected to the third electrode of the first transistor; wherein when the second switch is turned on, the first transistor receives the first control signal and is turned on according to the first control signal, thus the first power supply outputs the first supply voltage to charge up the display panel; when the third switch is turned on, the second transistor receives the second control signal and is turned on according to the second control signal, thus the second power supply outputs the second supply voltage to discharge the display panel.