Gate driving circuit

摘要

A shift register of a gate driving circuit includes a pull-up unit for pulling up a first output signal and a first gate signal to a high voltage level according to a driving voltage and a high-frequency clock signal, a start-up unit for transmitting a second gate signal, an energy-store unit for providing the driving voltage to the pull-up unit according to the second gate signal, a first discharging unit for pulling down the driving voltage to a first voltage level according to a first control signal, a first leakage-preventing unit for turning off the first discharging unit when the first gate signal reaches the high voltage level, a first pull-down unit for respectively pulling down the first output and first gate signals to the first and a second voltage levels according to the first control signal, and a first control unit for generating the first control signal.

主权项

1. A gate driving circuit capable of preventing current leakage, the gate driving circuit comprising plural-stage shift registers, an Nth stage shift register of the plural-stage shift registers comprising:
a pull-up unit electrically connected to an output line and a gate line for pulling up a first output signal of the output line and a first gate signal of the gate line to a high voltage level according to a driving voltage and a high-frequency clock signal; a start-up unit for transmitting a second gate signal according to a second output signal; an energy-store unit electrically connected to the pull-up unit and the start-up unit for performing a charging process to provide the driving voltage to the pull-up unit according to the second gate signal; a first discharging unit electrically connected to the energy-store unit for pulling down the driving voltage to a first voltage level according to a first control signal; a first leakage-preventing unit electrically connected to the first discharging unit for turning off the first discharging unit according to the first control signal, the driving voltage, and the first output signal when the first gate signal reaches the high voltage level; a first pull-down unit electrically connected to the output line and the gate line for respectively pulling down the first output signal and the first gate signal to the first voltage level and a second voltage level according to the first control signal; and a first control unit electrically connected to the first discharging unit and the first pull-down unit for generating the first control signal according to the driving voltage, a first low-frequency clock signal, and a third voltage level; wherein the first voltage level, the second voltage level, and the third voltage level are different voltage levels.