Patent ID: 8466909

Claim:
An output buffer, which is included in a source driver of a display driving device and outputs a source line driving signal for driving a source line, the output buffer comprising: a first output buffer driven between a first voltage rail and a second voltage rail, and adapted to output a first source line driving signal to a first output terminal in response to a first control signal and output a second source driving signal to a second output terminal in response to a second control signal; a second output buffer driven between a third voltage rail and a fourth voltage rail, and adapted to output a third source line driving signal to a third output terminal in response to the first control signal and output a fourth source line driving signal to a fourth output terminal in response to the second control signal; and a feedback circuit for connecting the first through fourth output terminals to negative input terminals of the first and second output buffers in response to the first control signal and the second control signal, wherein the first output terminal of the first output buffer is connected to the third output terminal of the second output buffer, and the second output terminal of the first output buffer is connected to the fourth output terminal of the second output buffer.