Shift register unit and driving method thereof, gate driving circuit, and display device

A driving method for a shift register unit, wherein the shift register unit comprises an input sub-circuit, an input terminal, a first voltage terminal, an output sub-circuit, an output terminal, a first clock terminal, a first reset sub-circuit, a reset terminal, a second voltage terminal, a second reset sub-circuit, a pull-down sub-circuit, a second clock terminal, a first storage sub-circuit, a pull-up node, a pull-down node, and a spacing sub-circuit, wherein

• the input sub-circuit is coupled to the input terminal, the first voltage terminal and the pull-up node, and configured to provide a signal at the first voltage terminal to the pull-up node in response to an active signal being inputted to the input terminal,
• the output sub-circuit is coupled to the pull-up node and the first clock terminal, and configured to output a signal at the first clock terminal in response to a signal at the pull-up node being an active signal,
• the first storage sub-circuit has two terminals coupled to the pull-up node and the output terminal, respectively, and is configured to keep a voltage difference between the pull-up node and the output terminal when the pull-up node is floating,
• the first reset sub-circuit is coupled to the reset terminal, the second voltage terminal, the pull-up node and the output terminal, and configured to provide a signal at the second voltage terminal to both the pull-up node and the output terminal in response to an active signal being inputted to the reset terminal,
• the second reset sub-circuit is coupled to the second clock terminal and the pull-down node, and configured to provide, in response to an active signal inputted to the second clock terminal, the active signal inputted to the second clock terminal to the pull-down node,
• the pull-down sub-circuit is coupled to the pull-down node, the second voltage terminal and the output terminal, and configured to provide the signal at the second voltage terminal to the output terminal in response to a signal at the pull-down node being an active signal, and
• the spacing sub-circuit is coupled to the pull-up node, the pull-down node and the second voltage terminal, and configured to provide the signal at the second voltage terminal to the pull-down node in response to the signal at the pull-up node being an active signal,
• the driving method comprises steps of:
• in an input stage, inputting an active signal to the input terminal, providing a voltage at the first voltage terminal to the pull-up node, and charging the pull-up node to make a signal at the pull-up node active, so that the pull-down node is coupled to the second voltage terminal and is discharged;
• in an output stage, making the pull-up node floating, the first storage sub-circuit bootstrapping, and a signal at the pull-up node active, so that the signal at the first clock terminal is provided to the output terminal, and the pull-down node is coupled to the second voltage terminal and is discharged;
• in a first reset stage, inputting an active signal to the reset terminal, so that both the pull-up node and the output terminal are coupled to the second voltage terminal and are discharged and a signal at the pull-down node is maintained to be an inactive signal;
• and
• in a second reset stage, inputting an active signal to the second clock terminal, so that the pull-down node is coupled to the second clock terminal and is charged, and a signal at the pull-down node is changed to an active signal, so as to couple the second signal terminal to the output terminal.