Patent ID: 8164278

Claim:
A source driver, adapted to drive a display panel, comprising: an output buffer, comprising: an input stage module, having a first input terminal receiving a driving signal, a second input terminal receiving an output signal, and a first connection terminal generating a first bias signal according to the driving signal and the output signal; a first output stage module, coupled to the first connection terminal of the input stage module for generating the output signal via an output terminal of the output buffer to the display panel according to the first bias signal; and a second output stage module, coupled to the first connection terminal of the input stage module for generating a second bias signal via a second connection terminal thereof according to the first bias signal, and comprising: a first switch, having a first terminal coupled to the output terminal of the output buffer, and a second terminal coupled to a first voltage, wherein the first switch is conducted according to the second bias signal; and a first control module, directly coupled between the output terminal of the output buffer, and the second connection terminal of the second output stage module for selectively and directly connecting a first current source to the output terminal of the output buffer or to the second connection terminal of the second output stage module according to an indication signal; and an output multiplexer, coupled between the output terminal of the output buffer and the display panel for conducting the output terminal of the output buffer to the display panel according to a switching signal.