Shift register and driving method thereof, driving circuit, display substrate and device

1. A shift register unit, comprising a first input circuit, a second input circuit, a control circuit and an output circuit, wherein

the first input circuit is respectively coupled to an input terminal, a second voltage terminal, a second clock signal terminal, a first node and a third node, and is configured to provide an input signal to the first node and provide a second voltage signal to the third node in response to a second clock signal provided by the second clock signal terminal; the input terminal is configured to provide the input signal, and the second voltage terminal is configured to provide the second voltage signal;

the second input circuit is respectively coupled to an input control terminal, the first node, the third node, a fourth node and a first voltage terminal, and is configured to output a first voltage signal to the third node and control a potential at the fourth node in response to a potential at the first node and an input control signal provided by the input control terminal; the input control terminal is a first clock signal terminal or a third clock signal terminal, and the input control signal is a first clock signal provided by the first clock signal terminal or a clock signal provided by the third clock signal terminal;

the control circuit is respectively coupled to the first node, the fourth node and the first voltage terminal and is configured to provide the first voltage signal to the first node in response to the potential at the fourth node; the first voltage terminal is configured to provide the first voltage signal; and

the output circuit is electrically coupled to the third node, the first node, the first voltage terminal, the first clock signal terminal and an output terminal, respectively, and is configured to control a signal output by the output terminal according to a potential at the third node, a potential at the first node, the first voltage signal and the first clock signal.

2. The shift register unit of claim 1 , wherein

the second input circuit comprises a first transistor, a second transistor, and a first capacitor, and the input control terminal is the first clock signal terminal;

a control electrode of the first transistor is electrically coupled to the first clock signal terminal, a first electrode of the first transistor is electrically coupled to the fourth node, and a second electrode of the first transistor is electrically coupled to the third node;

a control electrode of the second transistor is electrically coupled to the first node, a second electrode of the second transistor is electrically coupled to the fourth node, and a first electrode of the second transistor is electrically coupled to the first voltage terminal; and

a first terminal of the first capacitor is electrically coupled to the first clock signal terminal, and a second terminal of the first capacitor is electrically coupled to the fourth node.

3. The shift register unit of claim 1 , wherein

the second input circuit comprises a first transistor, a second transistor, and a first capacitor, and the input control terminal is the third clock signal terminal;

a control electrode of the first transistor is electrically coupled to the third clock signal terminal, a first electrode of the first transistor is electrically coupled to the fourth node, and a second electrode of the first transistor is electrically coupled to the third node;

a control electrode of the second transistor is electrically coupled to the first node, a second electrode of the second transistor is electrically coupled to the fourth node, and a first electrode of the second transistor is electrically coupled to the first voltage terminal; and

a first terminal of the first capacitor is electrically coupled to the third clock signal terminal, and a second terminal of the first capacitor is electrically coupled to the fourth node.

4. The shift register unit of claim 1 , wherein

the second input circuit comprises a first transistor, a second transistor, and a first capacitor;

a control electrode of the first transistor is electrically coupled to the input control terminal, a first electrode of the first transistor is electrically coupled to the fourth node, and a second electrode of the first transistor is electrically coupled to the third node;

a control electrode of the second transistor is electrically coupled to the first node, a second electrode of the second transistor is electrically coupled to the fourth node, and a first electrode of the second transistor is electrically coupled to the first voltage terminal; and

a first terminal of the first capacitor is electrically coupled to a direct-current voltage terminal or the input terminal, and a second terminal of the first capacitor is electrically coupled to the fourth node.

5. The shift register unit of claim 1 , wherein

the control circuit comprises a seventh transistor; and

a control electrode of the seventh transistor is electrically coupled to the fourth node, a first electrode of the seventh transistor is electrically coupled to the first voltage terminal, and a second electrode of the seventh transistor is coupled to the first node.

6. The shift register unit of claim 5 , wherein

the control circuit further comprises a fourth capacitor, and

a first terminal of the fourth capacitor is electrically coupled to the first voltage terminal, and a second terminal of the fourth capacitor is electrically coupled to the first node.

7. The shift register unit of claim 1 , wherein

the first input circuit comprises a third transistor and a fourth transistor,

a control electrode of the third transistor is electrically coupled to the second clock signal terminal, a first electrode of the third transistor is electrically coupled to the second voltage terminal, and a second electrode of the third transistor is electrically coupled to the third node; and

a control electrode of the fourth transistor is electrically coupled to the second clock signal terminal, a second electrode of the fourth transistor is electrically coupled to the first node, and a first electrode of the fourth transistor is electrically coupled to the input terminal.

8. The shift register unit of claim 1 , wherein

the output circuit comprises a voltage stabilizing sub-circuit and an output sub-circuit,

the voltage stabilizing sub-circuit is electrically coupled to the third node, the output terminal, the first node, the second node and a control voltage terminal, respectively, and is configured to maintain the potential at the third node, control connection or disconnection between the first node and the second node in response to a control voltage signal provided by the control voltage terminal, and control a potential at the second node according to the signal output by the output terminal, and

the output sub-circuit is electrically coupled to the third node, the second node, the first voltage terminal, the first clock signal terminal and the output terminal, respectively, and is configured to control provision of the first voltage signal to the output terminal under control of the potential at the third node, and control provision of the first clock signal to the output terminal under control of the potential at the second node.

9. The shift register unit of claim 8 , wherein

the voltage stabilizing sub-circuit comprises an eighth transistor, a second capacitor, and a third capacitor,

a control electrode of the eighth transistor is electrically coupled to the control voltage terminal, a first electrode of the eighth transistor is electrically coupled to the first node, and a second electrode of the eighth transistor is electrically coupled to the second node,

a first terminal of the second capacitor is coupled to the second node, and a second terminal of the second capacitor is coupled to the output terminal,

a first terminal of the third capacitor is coupled to the third node, and a second terminal of the third capacitor is coupled to the first voltage terminal,

the output sub-circuit comprises a fifth transistor and a sixth transistor,

a control electrode of the fifth transistor is electrically coupled to the third node, a first electrode of the fifth transistor is electrically coupled to the first voltage terminal, and a second electrode of the fifth transistor is electrically coupled to the output terminal,

a control electrode of the sixth transistor is electrically coupled to the second node, a first electrode of the sixth transistor is electrically coupled to the first clock signal terminal, and a second electrode of the sixth transistor is electrically coupled to the output terminal, and

the control voltage terminal is the second voltage terminal or the second clock signal terminal.

10. The shift register unit of claim 9 , wherein

the eighth transistor is a double-gate transistor.

11. The shift register unit of claim 9 , wherein

the output sub-circuit further comprises a fifth capacitor, and

a first terminal of the fifth capacitor is electrically coupled to the second node, and a second terminal of the fifth capacitor is electrically coupled to a direct current voltage terminal.

12. A driving circuit, comprising a plurality of shift register units coupled in cascade, the shift register unit being the shift register unit according to claim 1 , wherein

an input terminal of a first-stage shift register unit is coupled to a start signal terminal, an input terminal of a (i+1)th-stage shift register unit is coupled to an output terminal of an ith-stage shift register unit, an odd-numbered stage of shift register unit has a first clock signal terminal coupled to a first clock signal line and a second clock signal terminal coupled to a second clock signal line, and an even-numbered stage of shift register unit has a first clock signal terminal coupled to the second clock signal line and a second clock signal terminal coupled to the first clock signal line, where i+1 is a positive integer greater than or equal to 2.

13. The driving circuit of claim 12 , wherein

a third clock signal terminal of the odd-numbered stage of shift register unit is coupled to a fourth clock signal line, and a third clock signal terminal of the even-numbered stage of shift register unit is coupled to a third clock signal line.

14. The driving circuit of claim 13 , wherein a difference between a phase of a clock signal provided by the first clock signal line and a phase of a clock signal provided by the second clock signal line is 90 degrees; and

a clock signal provided by the third clock signal line is reversed with respect to the clock signal provided by the first clock signal line, and a clock signal provided by the fourth clock signal line is reversed with respect to the clock signal provided by the second clock signal line.

15. A method for driving a shift register unit, which is applied to the shift register unit of claim 1 , wherein the method comprises:

in a first phase, providing, by the first input circuit and in response to the second clock signal, the input signal to the first node and the second voltage signal to the third node, and providing, by the output circuit and under control of the potential at the third node, the first voltage signal to the output terminal;

in a second phase, maintaining, by the output circuit, the potential at the third node; controlling, by the second input circuit and in response to the input control signal, connection between the fourth node and the third node, so that the potential at the fourth node is the second voltage signal, and providing, by the control circuit and under control of the potential at the fourth node, the first voltage signal to the first node; and providing, by the output circuit and under control of the potential at the third node, the first voltage signal to the output terminal;

in a third phase, providing, by the first input circuit and in response to the second clock signal, the input signal to the first node, providing, by the first input circuit and in response to the second clock signal, the second voltage signal to the third node, providing, by the output circuit and under control of the potential at the third node, the first voltage signal to the output terminal, and providing, by the output circuit and under control of the potential at the first node, the first clock signal to the output terminal;

in a fourth phase, writing, by the second input circuit and under control of the potential at the first node and the input control signal, the first voltage signal into the third node, the potential at the first node being the second voltage signal, and providing, by the output circuit, the first clock signal to the output terminal;

in a fifth phase, writing, by the second input circuit and under control of the potential at the first node and the input control signal, the first voltage signal into the third node, the potential at the first node being the second voltage signal, and providing, by the output circuit, the first clock signal to the output terminal; and

in a sixth phase, providing, by the first input circuit and in response to the second clock signal, the input signal to the first node, and providing, by the first input circuit and in response to the second clock signal, the second voltage signal to the third node; and providing, by the output circuit and under control of the potential at the third node, the first voltage signal to the output terminal.

16. A display device, comprising a driving circuit, wherein the driving circuit is the driving circuit of claim 12 .