Patent ID: 8581883

Claim:
A sensor scan driver, comprising: a shift register unit adapted to sequentially generate sensor scan signals for driving a plurality of photodiodes; a transmission gate unit adapted to change a voltage range of sensor scan signals generated by the shift register unit; and a buffer unit adapted to supply the sensor scan signals supplied from the transmission gate unit to the photodiodes, wherein the transmission gate unit, includes: a first transmission gate including a positive polarity control electrode that is adapted to receive an output signal of the shift register unit, a negative polarity control electrode that is adapted to receive a signal obtained by inverting the output signal of the shift register unit, an input terminal coupled to a first power source having a first voltage, and an output terminal coupled to an output terminal of the transmission gate unit; and a second transmission gate including a positive polarity control electrode that is adapted to receive the signal obtained by inverting the output signal of the shift register unit, a negative polarity control electrode that is adapted to receive the output signal of the shift register unit, an input terminal coupled to a second power source having a second voltage, and having an output terminal coupled to the output terminal of the transmission gate unit.