Pixel driving circuit, driving method, display panel and display device

1. A pixel driving circuit, comprising:

a driving module, configured to drive a light-emitting element to emit light, wherein a control terminal of the driving module is electrically connected to a first node, and a first terminal of the driving module is electrically connected to a second node;

a data writing module, configured to write data signals, wherein a control terminal of the data writing module is electrically connected with a first scan signal line, and a first terminal of the data writing module is electrically connected with a data signal terminal; and

a coupling module, configured to couple the data signals to the first terminal of the driving module, wherein a first terminal of the coupling module is electrically connected to a second terminal of the data writing module, and a second terminal of the coupling module is electrically connected to the second node, and the coupling module is further configured to perform a voltage division during a light-emitting stage to reduce an effect of data signal caused by an input of a leakage current to a potential of the control terminal of the drive module.

2. The pixel driving circuit according to claim 1 , wherein:

the driving module includes a first transistor;

the data writing module includes a second transistor; and

the coupling module includes a coupling capacitor,

wherein:

a control terminal of the first transistor is electrically connected to the first node, and a first terminal of the first transistor is electrically connected to the second node;

a control terminal of the second transistor is electrically connected to the first scan signal line, a first terminal of the second transistor is electrically connected to the data signal terminal, and a second terminal of the second transistor is electrically connected to a first plate of the coupling capacitor; and

a second plate of the coupling capacitor is electrically connected to the second node.

3. The pixel driving circuit according to claim 1 , further comprising:

a second reset module, configured to reset the first terminal of the coupling module,

wherein:

a control terminal of the second reset module is electrically connected to a third scan signal line;

a first terminal of the second reset module is electrically connected to a second reference voltage signal terminal; and

a second terminal of the second reset module is electrically connected to the first terminal of the coupling module.

4. The pixel driving circuit according to claim 3 , wherein the second reset module comprises:

a fifth transistor,

wherein:

a control terminal of the fifth transistor is electrically connected to the third scan signal line;

a first terminal of the fifth transistor is electrically connected to the second reference voltage signal terminal; and

a second terminal of the fifth transistor is electrically connected to the first terminal of the coupling module.

5. The pixel driving circuit according to claim 1 , further comprising:

a third reset module, configured to reset the second node using a source voltage signal input from a first source voltage signal terminal,

wherein:

a control terminal of the third reset module is electrically connected to a first light-emitting control signal line;

a first terminal of the third reset module is electrically connected to the first source voltage signal terminal; and

a second terminal of the third reset module is electrically connected to the second node.

6. The pixel driving circuit according to claim 5 , further comprising:

a second light-emitting control module,

wherein:

a control terminal of the second light-emitting control module is electrically connected to a second light-emitting control signal line;

a first terminal of the second light-emitting control module is electrically connected to the second terminal of the driving module; and

a second terminal of the second light-emitting control module is electrically connected to the first terminal of the light-emitting element.

7. The pixel driving circuit according to claim 1 , further comprising:

a third reset module, configured to reset the second node,

wherein:

a control terminal of the third reset module is electrically connected to a third scan signal line;

a first terminal of the third reset module is electrically connected to a third reference voltage signal terminal; and

a second terminal of the third reset module is electrically connected to the second node.

8. The driving circuit according to claim 7 , wherein the third reset module comprises:

a sixth transistor,

wherein:

a control terminal of the sixth transistor is electrically connected to the third scan signal line;

a first terminal of the sixth transistor is electrically connected to the third reference voltage signal terminal; and

a second terminal of the sixth transistor is electrically connected to the second node.

9. The pixel driving circuit according to claim 7 , further comprising:

a first light-emitting control module,

wherein:

a control terminal of the first light-emitting control module is electrically connected to a first light-emitting control signal line;

a first terminal of the first light-emitting control module is electrically connected to a first power supply voltage signal terminal; and

a second terminal of the first light-emitting control module is electrically connected to the second node; and

a second light-emitting control module,

wherein:

a control terminal of the second light-emitting control module is electrically connected to the first light-emitting control signal line;

a first terminal of the second light-emitting control module is electrically connected to the second terminal of the driving module; and

a second terminal of the second light-emitting control module is electrically connected to the first terminal of the light-emitting element.

10. The pixel driving circuit according to claim 1 , further comprising:

a threshold compensation module; and

a storage module, configured to maintain a potential of the first node,

wherein:

a control terminal of the threshold compensation module is electrically connected to a second scan signal line;

a first terminal of the threshold compensation module is electrically connected to the first node;

a second terminal of the threshold compensation module is electrically connected to a second terminal of the driving module;

a first terminal of the storage module is electrically connected to the first node; and

a second terminal of the storage module is electrically connected to a first power supply voltage signal terminal.

11. The pixel driving circuit according to claim 10 , wherein:

the threshold compensation module includes a third transistor; and

the storage module includes a storage capacitor,

wherein:

a control terminal of the third transistor is electrically connected to the second scan signal line;

a first terminal of the third transistor is electrically connected to the first node;

a second terminal of the third transistor is electrically connected to the second terminal of the driving module;

a first plate of the storage capacitor is electrically connected to the first node; and

a second plate of the storage capacitor is electrically connected to the first power voltage signal terminal.

12. The pixel driving circuit according to claim 10 , further comprising:

a second reset module, configured to reset the first terminal of the coupling module,

wherein:

a control terminal of the second reset module is electrically connected to the third scan signal line;

a first terminal of the second reset module is electrically connected to the second terminal of the threshold compensation module; and

a second terminal of the second reset module is electrically connected to the first terminal of the coupling module.

13. The pixel driving circuit according to claim 10 , further comprising:

a first reset module, configured to reset the first node,

wherein:

a control terminal of the first reset module is electrically connected to a third scan signal line;

a first terminal of the first reset module is electrically connected to a first reference voltage signal terminal; and

a second terminal of the first reset module is electrically connected to the first node.

14. The pixel driving circuit according to claim 13 , wherein the first reset module comprises:

a fourth transistor,

wherein:

a control terminal of the fourth transistor is electrically connected to the third scan signal line;

a first terminal of the fourth transistor is electrically connected to the first reference voltage signal terminal; and

a second terminal of the fourth transistor is electrically connected to the first node.

15. The pixel driving circuit according to claim 13 , further comprising:

a second reset module, configured to reset the first terminal of the coupling module,

wherein:

a control terminal of the second reset module is electrically connected to the third scan signal line;

a first terminal of the second reset module is electrically connected to the second reference voltage signal terminal; and

a second terminal of the second reset module is electrically connected to the first terminal of the coupling module.

16. The pixel driving circuit according to claim 13 , further comprising:

a third reset module, configured to reset the second node,

wherein:

a control terminal of the third reset module is electrically connected to the third scan signal line;

a first terminal of the third reset module is electrically connected to the second terminal of the first reset module; and

a second terminal of the third reset module is electrically connected to the second node.

17. The pixel driving circuit according to claim 16 , further comprising:

a first light-emitting control module,

wherein:

a control terminal of the first light-emitting control module is electrically connected to a first light-emitting control signal line;

a first terminal of the first light-emitting control module is electrically connected to a first power supply voltage signal terminal; and

a second terminal of the first light-emitting control module is electrically connected to the second node; and

a second light-emitting control module,

wherein:

a control terminal of the second light-emitting control module is electrically connected to the first light-emitting control signal line;

a first terminal of the second light-emitting control module is electrically connected to the second terminal of the driving module; and

a second terminal of the second light-emitting control module is electrically connected to the first terminal of the light-emitting element.

18. A driving method, comprising:

providing a pixel driving circuit, wherein the pixel driving circuit includes:

a driving module, configured to drive a light-emitting element to emit light, wherein a control terminal of the driving module is electrically connected to a first node, and a first terminal of the driving module is electrically connected to a second node;

a data writing module, configured to write data signals, wherein a control terminal of the data writing module is electrically connected with a first scan signal line, and a first terminal of the data writing module is electrically connected with a data signal terminal; and

a coupling module, configured to couple the data signals to the first terminal of the driving module, wherein a first terminal of the coupling module is electrically connected to a second terminal of the data writing module, and a second terminal of the coupling module is electrically connected to the second node;

in a data writing stage, turning on the data writing module under a control of a first scan signal output by the first scan signal line, and coupling the data signal output by the data signal terminal to the first terminal of the drive module; and

in a light-emitting stage, performing a voltage division by the coupling module to reduce an effect of data signal caused by an input of a leakage current to a potential of the control terminal of the drive module.

19. The driving method according to claim 18 , wherein the pixel driving circuit further includes a second reset module, the method further comprising:

in an initialization stage, turning on the second reset module under a control of the third scan signal; and

resetting the first terminal of the coupling module using a reference voltage signal output by a second reference voltage signal terminal.

20. The driving method according to claim 18 , wherein the pixel driving circuit further includes a third reset module, the method further comprising:

in an initialization stage, turning on the third reset module under a control of a third scan signal; and

resetting the second node by a reference voltage signal output by the third reference voltage signal terminal.

21. The driving method according to claim 18 , wherein the pixel driving circuit further includes a third reset module, a control terminal of the third reset module is electrically connected to a first light-emitting control line, and a first terminal of the third reset module is electrically connected to a first source voltage signal terminal, the method further comprising:

in an initialization stage, turning on the third reset module under a control of a first light-emitting control signal output by the first light-emitting control signal line; and

resetting the second node using a first power supply voltage signal output by the first power supply voltage signal terminal.

22. The driving method according to claim 18 , wherein the pixel driving circuit further includes a threshold compensation module and a storage module, the method further comprising:

in the data writing stage, turning on the threshold compensation module under a control of a second scan signal output by a second scan signal line;

turning on the driving module under a control of the first node; and

maintaining a potential of the first node at a target voltage value by the storage module.

23. The driving method according to claim 22 , wherein the pixel driving circuit further includes a second reset module and a first terminal of the second reset module is electrically connected to a second terminal of the threshold compensation module, the method further comprising:

in an initialization stage, turning on the second reset module under a control of the third scan signal;

turning on the threshold compensation module under a control of the second scan signal; and

resetting the first terminal of the coupling module by a reference voltage signal output from the second terminal of the threshold compensation module.

24. The driving method according to claim 18 , wherein the pixel driving circuit further includes a first reset module, before the data writing stage, the method further comprising:

in an initialization stage, turning on the first reset module under a control of the third scan signal output by a third scan signal line; and

resetting the first node using a reference voltage signal output by a first reference voltage signal terminal.

25. The driving method according to claim 24 , wherein the pixel driving circuit further includes a second reset module and a first terminal of the second reset module is electrically connected to a second terminal of the first reset module, the method further comprising:

in the initialization stage, turning on the second reset module under the control of the third scan signal; and

resetting the first terminal of the coupling module by a reference voltage signal output by the second terminal of the first reset module.

26. The driving method according to claim 24 , wherein the pixel driving circuit further includes a third reset module and a first terminal of the third reset module is electrically connected to a second terminal of the first reset module, the method further comprising:

in the initialization stage, turning on the third reset module under a control of the third scan signal; and

resetting the second node by the reference voltage signal output by the second terminal of the first reset module.

27. A display device, comprising:

a display panel,

wherein the display panel includes:

a pixel driving circuit,

wherein the pixel driving circuit includes:

a driving module, configured to drive a light-emitting element to emit light, wherein a control terminal of the driving module is electrically connected to a first node, and a first terminal of the driving module is electrically connected to a second node;

a data writing module, configured to write data signals, wherein a control terminal of the data writing module is electrically connected with a first scan signal line, and a first terminal of the data writing module is electrically connected with a data signal terminal; and

a coupling module, configured to couple the data signals to the first terminal of the driving module, wherein a first terminal of the coupling module is electrically connected to a second terminal of the data writing module, and a second terminal of the coupling module is electrically connected to the second node, and the coupling module is further configured to perform a voltage division during a light-emitting stage to reduce an effect of data signal caused by an input of a leakage current to a potential of the control terminal of the drive module.