Patent ID: 8884677

Claim:
A source driver, comprising: a first gamma operational amplifier circuit comprising: a first switch circuit configured to receive a first reference voltage and a second reference voltage, wherein the first switch circuit comprises: a first input terminal configured to receive the first reference voltage; a second input terminal configured to receive the second reference voltage; a first output terminal configured to output one of the first reference voltage and the second reference voltage; and a second output signal configured to output the other of the first reference voltage and the second reference voltage; a first operational amplifier electrically connected to the first output terminal of the first switch circuit to output the one of the first reference voltage and the second reference voltage; a second operational amplifier electrically connected to the second output terminal of the first switch circuit to output the other of the first reference voltage and the second reference voltage; and a second switch circuit electrically connected to the first operational amplifier and the second operational amplifier, wherein the second switch circuit comprises: a first input terminal electrically connected to the first operational amplifier to receive the one of the first reference voltage and the second reference voltage; a second input terminal electrically connected to receive the other of the first reference voltage and the second reference voltage; a first output terminal configured to output the one of the first reference voltage and the second reference voltage; and a second output terminal configured to output the other of the first reference voltage and the second reference voltage; a first resistor string electrically connected to the first output terminal and the second output terminal of the second switch circuit, wherein the first resistor string is configured to divide a voltage difference between the first reference voltage and the second reference voltage into a plurality of sub-voltages; and a digital-to-analog converter electrically connected to the first resistor string to receive the sub-voltages, the first reference voltage and the second reference voltage.