Patent ID: 7050033

Claim:
A source driver in a liquid crystal display apparatus for receiving an input voltage and generating an output voltage to drive a data line, comprising: a ground terminal to which a ground voltage is applied; a power supply terminal to which a power supply voltage higher than the ground voltage is applied; an input terminal for receiving the input voltage; an output terminal for generating the output voltage; first and second P-channel MOS transistors each having a gate connected to a drain of the first P-channel MOS transistor, the second P-channel MOS transistor having a source connected to the output terminal; first and second N-channel MOS transistors each having a gate connected to a drain of the first N-channel MOS transistor, the second N-channel MOS transistor having a source connected to the output terminal; a third N-channel MOS transistor having a gate connected to the input terminal and a source connected to a source of the first P-channel MOS transistor; a third P-channel MOS transistor having a drain connected to the power supply terminal, and a gate connected to a source of the third P-channel MOS transistor; a first switch connected between the source of the third P-channel MOS transistor and the drain of the first N-channel MOS transistor; a second switch connected between the ground terminal and the drain of the first P-channel MOS transistor; a third switch connected between the power supply terminal and a drain of the third N-channel MOS transistor; a fourth switch connected between the input terminal and a source of the first N-channel MOS transistor; a fifth switch connected between the power supply terminal and a drain of the second N-channel MOS transistor; a sixth switch connected between the ground terminal and a drain of the second-P-channel MOS transistor; and a first capacitor connected between a control signal terminal and the drain of the first N-channel MOS transistor.