Liquid crystal display source driving circuit with structure providing reduced size

The source driving circuit of the LCD has a structure to decrease the surface area is disclosed. A source driving circuit of the LCD according to the present invention is disposed along the one end of the LCD panel, and, responsive to the digital video image signal and a control signal including R, G, the color signal of B is received from the control circuit to the LCD panel in the source driving circuit for driving, it characterized in that it comprises a plurality of latch circuits, a plurality of level shifters, a plurality of the first decoder, a plurality of second decoders, a plurality of multiplexer circuits, and a plurality of amplifiers . A plurality of latch circuits latches any one of the at least two color signals in response to the selection signal and the latch signal of the control signal, N, and outputs the latched data of the (N is a natural number of 1 or more) bits. A plurality of level shifters are output by increasing the voltage level of the latched data. A plurality of first decoders are responsive to the latched data is output from a plurality of level shifters, and outputs any one of a plurality of first reference voltages having different voltage levels of positive polarity. A plurality of second decoders responsive to latch data output from the plurality of level shifters, and outputs any one of a plurality of second reference voltage having a negative polarity different voltage levels. A plurality of multiplexer circuits and outputs either the first voltage and the second reference voltage reference in response to the mux selection signal of the control signal. A plurality of amplifiers to increase the amount of current of the first reference voltage and the second reference voltage outputted from a plurality of multiplexer circuits, and outputs an analog video signal. A source driving circuit of the LCD according to the present invention has the advantage that selectively latched into a digital image signal by the latch circuit including the functions of the MUX circuit, it is possible to reduce the area of ​​the source perpendicular to the channel.