Pixel circuit, method for driving the same, display panel and display device

A display panel, comprising:

• a pixel circuit having a writing module, a driving module, a resetting module, a switch module, a power input module, a first maintenance module, a light-emitting element, a second maintenance module, and a light-emission control module, wherein
• a control end of the writing module is connected to a scanning signal end, an input end of the writing module is connected to a data signal end, and an output end of the writing module is connected to a first node;
• the writing module is configured to write a signal from the data signal end into the first node under the control of the scanning signal end;
• a control end of the switch module is connected to a resetting signal end, an input end of the switch module is connected to a second node, and an output end of the switch module is connected to the first node;
• the switch module is configured to electrically connect the first node to the second node under the control of the resetting signal end;
• a control end of the power input module is connected to a light-emitting signal end, an input end of the power input module is connected to a first power signal end, and an output end of the power input module is connected to the second node;
• the power input module is configured to input a signal from the first power signal end into the second node under the control of the light-emitting signal end;
• a first control end and a second control end of the resetting module are connected to the resetting signal end, an input end of the resetting module is connected to a reference signal end, a first output end of the resetting module is connected to a third node, and a second output end of the resetting module is connected to a fourth node;
• the resetting module is configured to output a signal from the reference signal end to the third node and the fourth node under the control of the resetting signal end;
• a control end of the driving module is connected to the third node, a first input end of the driving module is connected to the first node, a second input end of the driving module is connected to the second node, and an output end of the driving module is connected to the fourth node;
• a signal from the first node is configured to adjust a potential at the third node:
• the driving module is configured to output a signal from the second node to the fourth node under the control of the third node;
• the light-emitting element is connected between the fourth node and a second power signal end;
• the first maintenance module is connected between the first node and the second node, and configured to stabilize potentials at the first node and the second node through the signals from the first node and the second node, wherein the first maintenance module comprises a first capacitor connected between the first node and the second node;
• the second maintenance module is connected between the first power signal end and the first node, and configured to stabilize the potential at the first node through the signal from the first power signal end, wherein the second maintenance module comprises a second capacitor connected between the first power signal end and the first node;
• wherein a control end of the light-emission control module is connected to the light-emitting signal end, an input end of the light-emission control module is connected to the fourth node, an output end of the light-emission control module is connected to an input end of the light-emitting element, and the light-emission control module is configured to output a signal from the fourth node to the input end of the light -emitting element under the control of the light-emitting signal end;
• and
• wherein the light-emission control module comprises a first switching transistor, a gate electrode of the first switching transistor is connected to the light-emitting signal end, a first electrode of the first switching transistor is connected to the fourth node, and a second electrode of the first switching transistor is connected to the input end of the light-emitting element.

A display device, comprising:

• a display panel including a pixel circuit having a writing module, a driving module, a resetting module, a switch module, a power input module, a first maintenance module, a light-emitting element, a second maintenance module, and a light-emission control module, wherein
• a control end of the writing module is connected to a scanning signal end, an input end of the writing module is connected to a data signal end, and an output end of the writing module is connected to a first node;
• the writing module is configured to write a signal from the data signal end into the first node under the control of the scanning signal end;
• a control end of the switch module is connected to a resetting signal end, an input end of the switch module is connected to a second node, and an output end of the switch module is connected to the first node;
• the switch module is configured to electrically connect the first node to the second node under the control of the resetting signal end;
• a control end of the power input module is connected to a light-emitting signal end, an input end of the power input module is connected to a first power signal end, and an output end of the power input module is connected to the second node;
• the power input module is configured to input a signal from the first power signal end into the second node under the control of the light-emitting signal end;
• a first control end and a second control end of the resetting module are connected to the resetting signal end, an input end of the resetting module is connected to a reference signal end, a first output end of the resetting module is connected to a third node, and a second output end of the resetting module is connected to a fourth node;
• the resetting module is configured to output a signal from the reference signal end to the third node and the fourth node under the control of the resetting signal end;
• a control end of the driving module is connected to the third node, a first input end of the driving module is connected to the first node, a second input end of the driving module is connected to the second node, and an output end of the driving module is connected to the fourth node;
• a signal from the first node is configured to adjust a potential at the third node:
• the driving module is configured to output a signal from the second node to the fourth node under the control of the third node;
• the light-emitting element is connected between the fourth node and a second power signal end;
• the first maintenance module is connected between the first node and the second node, and configured to stabilize potentials at the first node and the second node through the signals from the first node and the second node, wherein the first maintenance module comprises a first capacitor connected between the first node and the second node;
• the second maintenance module is connected between the first power signal end and the first node, and configured to stabilize the potential at the first node through the signal from the first power signal end, wherein the second maintenance module comprises a second capacitor connected between the first power signal end and the first node;
• wherein a control end of the light-emission control module is connected to the light-emitting signal end, an input end of the light-emission control module is connected to the fourth node, an output end of the light-emission control module is connected to an input end of the light-emitting element, and the light-emission control module is configured to output a signal from the fourth node to the input end of the light-emitting element under the control of the light-emitting signal end;
• and
• wherein the light-emission control module comprises a first switching transistor, a gate electrode of the first switching transistor is connected to the light-emitting signal end, a first electrode of the first switching transistor is connected to the fourth node, and a second electrode of the first switching transistor is connected to the input end of the light-emitting element.