Shift register unit and driving method thereof, gate driving apparatus and display apparatus

A shift register unit, comprising:

• an input circuit, whose first terminal receives an input signal of the shift register unit, and second terminal is connected to a pull-up node, the input circuit being configured to output the input signal to the pull-up node;
• an output circuit, whose first terminal is connected to a clock signal terminal, second terminal is connected to the pull-up node, and third terminal is connected to an output terminal of the shift register unit, and the output circuit being configured to output a signal of the clock signal terminal to the output terminal under the control of the pull-up node;
• and
• a pull-up node control circuit, whose first terminal is connected to a first power supply voltage terminal, second terminal is connected to a third power supply voltage terminal, and third terminal is connected to the pull-up node, the pull-up node control circuit being configured to discharge the pull-up node through the third power supply voltage terminal under the control of the first power supply voltage terminal,
• wherein when the first power supply voltage terminal jumps from a first level to a second level, the pull-up node control circuit discharges the pull-up node through the third power supply voltage terminal under the control of the second level, and
• wherein when the first power supply voltage terminal further jumps from the second level to a zero voltage, the pull-up node control circuit continuously discharges the pull-up node through the third power supply voltage terminal until the pull-up node is at a zero voltage.