A driving circuit of a liquid crystal display including a first input port, a second input port, a first gamma buffer, a second gamma buffer, and a switching circuit is provided. A plurality of first gamma voltages are inputted from the first input port, and a plurality of second gamma voltages are inputted from the second input port. The switching circuit switches the connections between the two input ports and the two gamma buffers, such that a first line of pixels of the liquid crystal display receives the gamma voltages from the first gamma buffer within a first frame period and a second frame period, and that a second line of pixels of the liquid crystal display receives the gamma voltages from the second gamma buffer within the first frame period and the second frame period.