Shift register unit, driving method thereof, scan driving circuit and display panel

A method of driving a shift register unit, the shift register unit being for use by a self-capacitive touch screen, the self-capacitive touch screen being configured to alternately operate in a display phase and a touch sensing phase, the shift register unit comprising:

• an input circuit configured to transfer an input signal from an input terminal to a first node in response to a first clock signal from a first clock signal terminal being active:
• a first control circuit configured to transfer a first reference voltage from a first reference voltage terminal to the first node in response to a second node being at an active potential and a second clock signal from a second clock signal terminal being active, and to transfer the first clock signal from the first clock signal terminal to the second node in response to the first node being at an active potential:
• a second control circuit configured to transfer a second reference voltage from a second reference voltage terminal to the second node in response to the first clock signal from the first clock signal terminal being active, and to transfer the second clock signal from the second clock signal terminal to a third node in response to the second node being at an active potential:
• a third control circuit configured to bring the third node into conduction with a fourth node in response to the second clock signal from the second clock signal terminal being active, and to transfer the first reference voltage from the first reference voltage terminal to the fourth node in response to the first node being at an active potential:
• a first output circuit configured to transfer the first reference voltage from the first reference voltage terminal to an output terminal in response to the fourth node being at an active potential;
• and a second output circuit configured to transfer a third reference voltage from a third reference voltage terminal to the output terminal in response to the first node being at an active potential, the method comprising:
• in the display phase, selectively transferring, by the first and second output circuits, the first reference voltage from the first reference voltage terminal and the third reference voltage from the third reference voltage terminal to the output terminal, depending on potentials of the first node and the fourth node;
• and
• in the touch sensing phase, transferring, by the second output circuit, the third reference voltage from the third reference voltage terminal to the output terminal.