Patent ID: 7808468

Claim:
A source driver of a liquid crystal display (LCD), comprising: a plurality of output buffers for driving data lines; and a bias circuit for varying a bias voltage inputted to the output buffers to control a slew rate of the output buffers to fall within a predetermined range, wherein the bias circuit comprises a fusing resistor part including at least one resistor and fuse, the fusing resistor part determining a reference current of the bias circuit and controlling the bias voltage according to the reference current; and wherein each of the output buffers comprises: a bias current source for receiving the bias voltage to output a bias current; an input unit for receiving an analog image signal and a data line driving signal to output a differential current that is varied according to the bias current received by the input unit from the bias current source; an amplification output unit for generating the data line driving signal in response to the differential current; and a capacitor for stabilizing a frequency characteristic of the data line driving signal, wherein the bias circuit further comprises first and second transistors that have their gates connected to each other, a first terminal of each of the first and second transistors is connected to ground, the fusing resistor part is connected between a second terminal of the first transistor and a power supply voltage, and the bias voltage is output from a node between the power supply voltage and a second terminal of the second transistor.