Data Driver and Display Device using the same

The present invention provides a data driver including a second power generation unit and the auxiliary power output. Second power generating section to generate the auxiliary power. Auxiliary power output unit outputs the second power control under the second power generation unit. Auxiliary power output unit and the first transistor outputting a second power output from the second power generation unit, the first is connected to a second power output from the transistor to the diode and a diode in parallel with the output for outputting a second power with a diode of claim and a second transistor.