A PUMPING CIRCUIT

摘要

A pumping circuit is provided to simultaneously generate pumping voltage for generating a gate signal and pumping voltage for generating a gray signal by using one pumping circuit. A pumping circuit includes a first pumping unit(PP1), a second pumping unit(PP2), a third pumping unit(PP3), a fourth pumping unit(PP4), and a first outputting unit(OT1). The first pumping unit generates the first pumping voltage by pumping the voltage(VCI) inputted from the outside, and outputs any one of the inputted voltage or the first pumping voltage according to an external control signal. The second pumping unit combines the inputted voltage from the outside with the output of the first pumping unit to generate any one of the second pumping voltage or the third pumping voltage, and outputs any one of the inputted voltage or the first to third pumping voltages according to the external control signal. The third pumping unit combines the inputted voltage with the outputs of the first and second pumping units to generate any one of the fourth pumping voltage or the fifth pumping voltage, and outputs the inputted voltage or the first to fifth pumping voltages according to the external control signal. The fourth pumping unit combines the inputted voltage with the outputs of the first and third pumping units to generate the sixth pumping voltage or the seventh pumping voltage, and outputs the inputted voltage or the first to seventh pumping voltages according to the external control signal. The first outputting unit determines the output from the fourth pumping unit according to the external control signal.