Patent ID: 8872859

Claim:
A source driver for driving source lines of a liquid crystal panel, the source driver comprising: a plurality of output buffers; a plurality of output pads which are connected to the liquid crystal panel; a switching unit which is disposed between the plurality of output buffers and the plurality of output pads and controls an electrical connection state of the plurality of output pads in response to a switching control signal; and a switching control unit configured to generate the switching control signal, wherein the switching control unit comprises: a power sensing unit which senses the level up or the level down of the power voltage and generates a reset signal; and a switching control signal generation unit which outputs the switching control signal in response to at least one control signal input from an external device after being initialized in response to the reset signal, and wherein, if a level up or a level down of a power voltage occurs, the switching unit prevents output signals of the plurality of output buffers from being transmitted to the liquid crystal panel via corresponding output pads and performs at least one of a charge sharing operation for connecting the plurality of output pads to each other and a discharging operation for providing a discharge path from the plurality of output pads to a ground terminal, in a preset period.