Patent ID: 8174481

Claim:
A driving circuit of a liquid crystal display, comprising: a first input port, adapted to input a plurality of first gamma voltages; a second input port, adapted to input a plurality of second gamma voltages; a switching circuit, coupled to the first input port and the second input port; a first gamma buffer, coupled to the switching circuit and adapted to receive the first gamma voltages or the second gamma voltages and to buffer then output the received first gamma voltages or the received second gamma voltages; a second gamma buffer, coupled to the switching circuit and adapted to receive the first gamma voltages or the second gamma voltages and to buffer then output the received first gamma voltages or the received second gamma voltages; a plurality of first digital-to-analog converters (DACs), coupled to an output port of the first gamma buffer and an output port of the second gamma buffer; a plurality of second DACs, coupled to the output ports of the first gamma buffer and the second gamma buffer; a plurality of first operational amplifiers, coupled between the first DACs and a plurality of lines of first pixels of the liquid crystal display; and a plurality of second operational amplifiers, coupled between the second DACs and a plurality of lines of second pixels of the liquid crystal display; wherein during a first frame period of the liquid crystal display, the switching circuit couples the first input port to the first gamma buffer and couples the second input port to the second gamma buffer, the first DACs respectively select one of the first gamma voltages transmitted from the first gamma buffer to output to a corresponding one of the lines of the first pixels, and the second DACs respectively select one of the second gamma voltages transmitted from the second gamma buffer to output to a corresponding one of the lines of the second pixels; wherein during a second frame period of the liquid crystal display, the switching circuit couples the first input port to the second gamma buffer and couples the second input port to the first gamma buffer, the first DACs respectively select one of the second gamma voltages from the first gamma buffer to output to a corresponding one of the lines of the first pixels, and the second DACs respectively select one of the second gamma voltages from the second gamma buffer to output to a corresponding one of the lines of the second pixels.