Patent ID: 7683876

Claim:
A source driver for driving a flat panel display, comprising: a multiplexer selecting image data in response to channel selection signals; an inversion circuit selectively inverting output data of the multiplexer in response to an inversion drive control signal; a latch circuit storing output data of the inversion circuit and outputting the stored data in response to a latch control signal; a gamma decoder receiving a plurality of analog voltages, the number of which is determined based on the number of bits of image data and selecting one of the analog voltages in response to the output data of the latch circuit; and a channel section unit outputting the selected analog voltage to one of a plurality of channels in response to the channel selection signals, wherein each of the selected analog voltages corresponding to the image data is output to the corresponding channel in one horizontal scan period; wherein the source driver further includes a buffer which is configured to buffer the selected analog voltage, and the buffer is connected between the gamma decoder and the channel selection unit and commonly connected to the plurality of channels through the channel selection unit; wherein the channel selection unit includes a plurality of switches which are configured to connect an output of the buffer to the plurality of channels, and wherein the latch control signal provides pulses, the number of which is equal to the number of channels of image data supplied to the multiplexer in the horizontal scan period.