Pixel circuit, driving method thereof, and display device

1. A pixel circuit, comprising:

a light-emitting assembly comprising a plurality of light-emitting elements;

a driving sub-circuit electrically coupled to the light-emitting assembly and configured to generate driving current for driving the light-emitting assembly to emit light; and

a repair sub-circuit electrically coupled to the light-emitting assembly and configured to: receive a repair scanning signal and a repair data signal, and provide the driving current to at least one light-emitting element capable of emitting light normally among the plurality of light-emitting elements under the control of the repair scanning signal and the repair data signal, to enable the light-emitting assembly to emit light in the presence of a malfunctioning light-emitting element in the plurality of light-emitting elements,

wherein the plurality of light-emitting elements are coupled in series.

2. The pixel circuit according to claim 1 , wherein the light-emitting element comprises a Micro light-emitting diode or a Mini light-emitting diode.

3. The pixel circuit according to claim 1 , wherein the driving sub-circuit comprises a first transistor, a driving transistor and a first capacitor; wherein

the first transistor has a control electrode electrically coupled to receive a driving scanning signal, a first electrode electrically coupled to receive a driving data signal, and a second electrode electrically coupled to a control electrode of the driving transistor;

the driving transistor has the control electrode electrically coupled to a first end of the first capacitor, a first electrode electrically coupled to the light-emitting assembly, and a second electrode electrically coupled to a first power supply; and

the first capacitor has a second end electrically coupled to the first power supply.

4. The pixel circuit according to claim 1 , wherein the light-emitting assembly comprises N light-emitting elements, and the repair sub-circuit comprises N repair modules corresponding to the N light-emitting elements one-to-one; an i th repair module is configured to receive an i th repair scanning signal and an i th repair data signal, and provide the driving current to an i th light-emitting element under the control of the i th repair scanning signal and the i th repair data signal, where N is a natural number greater than 1, and 1≤i≤N.

5. The pixel circuit according to claim 4 , wherein the i th repair module comprises:

a node control unit electrically coupled to a light-emitting control unit and configured to: receive the i th repair scanning signal and the i th repair data signal, generate a light-emitting control signal based on the i th repair scanning signal and the i th repair data signal, and provide the light-emitting control signal to the light-emitting control unit; and

the light-emitting control unit coupled in parallel to both ends of the i th light-emitting element and configured to: receive the light-emitting control signal, and control the driving current to flow through the i th light-emitting element or short circuit the i th light-emitting element under the control of the light-emitting control signal.

6. The pixel circuit according to claim 5 , wherein the node control unit of the i th repair module comprises a (2i) th transistor and an (i+1) th capacitor; wherein

the (2i) th transistor has a control electrode electrically coupled to receive the i th repair scanning signal, a first electrode electrically coupled to receive the i th repair data signal, and a second electrode electrically coupled to a first end of the (i+1) th capacitor; and

the (i+1) th capacitor has a second end electrically coupled to the first power supply.

7. The pixel circuit according to claim 6 , wherein the light-emitting control unit comprises a (2i+1) th transistor; and

wherein the (2i+1) th transistor has a control electrode electrically coupled to the second electrode of the (2i) th transistor, a first electrode electrically coupled to an anode of the i th light-emitting element, and a second electrode electrically coupled to a cathode of the i th light-emitting element.

8. The pixel circuit according to claim 6 , wherein control electrodes of the (2i) th transistors of the plurality of repair modules are electrically coupled to a control electrode of a first transistor of the driving sub-circuit.

9. The pixel circuit according to claim 6 , wherein first electrodes of the (2i) th transistors of the plurality of repair modules are electrically coupled together.

10. A driving method of the pixel circuit according to claim 1 , comprising:

generating, by a driving sub-circuit, driving current for driving a light-emitting assembly to emit light; and

providing, by a repair sub-circuit, the driving current to at least one light-emitting element capable of emitting light normally among a plurality of light-emitting elements.

11. A display device comprising a plurality of sub-pixels each comprising the pixel circuit according to claim 1 .

12. The display device according to claim 11 , further comprising:

a signal read line;

a detecting module electrically coupled to the pixel circuit and the signal read line, and configured to output detected current to the signal read line, wherein the detected current corresponds to a brightness of the sub-pixel corresponding to the pixel circuit; and

a control module electrically coupled to the signal read line and configured to: identify a light-emitting state of each light-emitting element in the sub-pixel based on the detected current, and provide repair scanning signals and repair data signals to a plurality of repair modules of the pixel circuit based on the light-emitting state of each light-emitting element.

13. The display device according to claim 12 , wherein the detecting module comprises a (2N+2) th transistor and a photodiode, where N is a natural number greater than 1; and wherein

the (2N+2) th transistor has a control electrode electrically coupled to receive a detection scanning signal, a first electrode electrically coupled to an anode of the photodiode, and a second electrode electrically coupled to the signal read line; and

the photodiode has a cathode electrically coupled to a second power supply.