Drive circuit, driving method thereof and display device

1. A drive circuit, comprising:

a current control circuit, configured to provide a drive signal to a device to be driven according to a signal of a data signal terminal;

a first transistor, electrically connected between the current control circuit and the device to be driven; and

a duration control circuit, electrically connected with a gate of the first transistor, and configured to provide a light-emitting duration modulating signal to the gate of the first transistor according to a combined action of a signal of a scanning signal terminal, a signal of a light-emitting control signal terminal, a signal of a duration control signal terminal and a signal of a reference voltage signal terminal, to control a conduction duration of the first transistor.

2. The drive circuit of claim 1 , wherein the duration control circuit comprises an input control sub-circuit and a comparison sub-circuit;

the input control sub-circuit is configured to provide the signal of the duration control signal terminal to a connection node in response to the signal of the scanning signal terminal, and provide a signal of the connection node to the comparison sub-circuit in response to the signal of the light-emitting control signal terminal; and

the comparison sub-circuit is configured to output the light-emitting duration modulating signal according to a signal output by the input control sub-circuit and the signal of the reference voltage signal terminal.

3. The drive circuit of claim 2 , wherein the input control sub-circuit comprises a second transistor, a third transistor and a first capacitor;

a gate of the second transistor is electrically connected with the scanning signal terminal, a first end of the second transistor is electrically connected with the duration control signal terminal, and a second end of the second transistor is electrically connected with the connection node;

a gate of the third transistor is electrically connected with the light-emitting control signal terminal, a first end of the third transistor is electrically connected with the connection node, and a second end of the third transistor is electrically connected with the comparison sub-circuit; and

the first capacitor is electrically connected between a first power terminal and the connection node.

4. The drive circuit of claim 3 , wherein the current control circuit comprises a drive transistor, a fourth transistor and a second capacitor;

a gate of the fourth transistor is electrically connected with the scanning signal terminal, a first end of the fourth transistor is electrically connected with the data signal terminal, and a second end of the fourth transistor is electrically connected with a gate of the drive transistor;

a first end of the drive transistor is electrically connected with the first power terminal, and a second end of the drive transistor is electrically connected with the first end of the first transistor; and

the second capacitor is electrically connected between the gate of the drive transistor and the first power terminal.

5. The drive circuit of claim 3 , further comprising: a fifth transistor, wherein the first transistor is electrically connected with the device to be driven through the fifth transistor; and

the gate of the fifth transistor is electrically connected with the light-emitting control signal terminal.

6. The drive circuit of claim 2 , wherein the comparison sub-circuit comprises a comparator;

an in-phase input of the comparator is electrically connected with the input control sub-circuit, an anti-phase input of the comparator is electrically connected with the reference voltage signal terminal, and an output of the comparator is electrically connected with the gate of the first transistor.

7. The drive circuit of claim 6 , wherein the current control circuit comprises a drive transistor, a fourth transistor and a second capacitor;

a gate of the fourth transistor is electrically connected with the scanning signal terminal, a first end of the fourth transistor is electrically connected with the data signal terminal, and a second end of the fourth transistor is electrically connected with a gate of the drive transistor;

a first end of the drive transistor is electrically connected with the first power terminal, and a second end of the drive transistor is electrically connected with the first end of the first transistor; and

the second capacitor is electrically connected between the gate of the drive transistor and the first power terminal.

8. The drive circuit of claim 6 , further comprising: a fifth transistor, wherein the first transistor is electrically connected with the device to be driven through the fifth transistor; and

the gate of the fifth transistor is electrically connected with the light-emitting control signal terminal.

9. The drive circuit of claim 2 , wherein the current control circuit comprises a drive transistor, a fourth transistor and a second capacitor;

a gate of the fourth transistor is electrically connected with the scanning signal terminal, a first end of the fourth transistor is electrically connected with the data signal terminal, and a second end of the fourth transistor is electrically connected with a gate of the drive transistor;

a first end of the drive transistor is electrically connected with the first power terminal, and a second end of the drive transistor is electrically connected with the first end of the first transistor; and

the second capacitor is electrically connected between the gate of the drive transistor and the first power terminal.

10. The drive circuit of claim 2 , further comprising: a fifth transistor, wherein the first transistor is electrically connected with the device to be driven through the fifth transistor; and

the gate of the fifth transistor is electrically connected with the light-emitting control signal terminal.

11. The drive circuit of claim 1 , wherein the current control circuit comprises a drive transistor, a fourth transistor and a second capacitor;

a gate of the fourth transistor is electrically connected with the scanning signal terminal, a first end of the fourth transistor is electrically connected with the data signal terminal, and a second end of the fourth transistor is electrically connected with a gate of the drive transistor;

a first end of the drive transistor is electrically connected with the first power terminal, and a second end of the drive transistor is electrically connected with the first end of the first transistor; and

the second capacitor is electrically connected between the gate of the drive transistor and the first power terminal.

12. The drive circuit of claim 11 , further comprising: a fifth transistor, wherein the first transistor is electrically connected with the device to be driven through the fifth transistor; and

the gate of the fifth transistor is electrically connected with the light-emitting control signal terminal.

13. The drive circuit of claim 1 , further comprising: a fifth transistor, wherein the first transistor is electrically connected with the device to be driven through the fifth transistor; and

the gate of the fifth transistor is electrically connected with the light-emitting control signal terminal.

14. A display device, comprising:

a substrate; and

a plurality of sub-pixels, on one side of the substrate; wherein

at least one of the plurality of sub-pixels comprises a light-emitting device, and the drive circuit of claim 1 ; wherein the light-emitting device serves as the device to be driven.

15. The display device of claim 14 , wherein the display device further comprises a plurality of light-emitting control signal lines and a light-emitting control input; wherein light-emitting control signal terminals of the drive circuits of a row of sub-pixels are correspondingly electrically connected with a light-emitting control signal line; and each of the light-emitting control signal lines is electrically connected with the light-emitting control input.

16. The display device of claim 15 , wherein the device to be driven comprises: at least one of a micro light emitting diode, an organic electroluminescent diode or a quantum dot light emitting diode.

17. The display device of claim 14 , wherein the display device further comprises a plurality of light-emitting control signal lines independent with one another; and

light-emitting control signal terminals of the drive circuits of a row of sub-pixels are correspondingly electrically connected with a light-emitting control signal line.

18. The display device of claim 17 , wherein the device to be driven comprises: at least one of a micro light emitting diode, an organic electroluminescent diode or a quantum dot light emitting diode.

19. The display device of claim 14 , wherein the device to be driven comprises: at least one of a micro light emitting diode, an organic electroluminescent diode or a quantum dot light emitting diode.

20. A driving method of the display device of claim 14 , comprising:

for each row of sub-pixels,

inputting, by the current control circuit, the signal of the data signal terminal in response to the signal of the scanning signal terminal in a signal input stage;

inputting, by the duration control circuit, the signal of the duration control signal terminal in response to the signal of the scanning signal terminal in the signal input stage;

generating, by the current control circuit, the drive signal which drives the device to be driven to emit light according to the signal of the data signal terminal; and

providing, by the duration control circuit, the light-emitting duration modulating signal to the gate of the first transistor according to the combined action of the signal of the light-emitting control signal terminal, the signal of the reference voltage signal terminal and the signal of the duration control signal terminal, to control the conduction duration of the first transistor; wherein

a voltage of the reference voltage signal terminal is changed monotonously in a preset duration, a voltage of the duration control signal terminal is a fixed voltage and the fixed voltage is within the monotonously changed range of the voltage of the reference voltage signal terminal, and one frame comprises the signal input stage and the light-emitting stage.