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US 2023/0402005 A1Published application
Pixel circuit and display panel
AssigneeWuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorsDachao LIU, Mian ZENG, Liang SUN
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Abstract
Embodiments of the present disclosure are directed to a pixel circuit and a display panel. The pixel circuit includes a light-emitting device, a driving transistor, a data signal writing module, a threshold voltage compensation module, a first initialization module, a light-emitting control module, and a coupling capacitor. By adding a coupling capacitor in the pixel circuit, the gate potential of the driving transistor is maintained at the initial value under a long period of display.
Claims20
A pixel circuit, comprising:
- a light emitting device, applied with a first power signal and a second power signal;
- a data signal writing module, outputting a data signal in response to a first scan signal;
- a driving transistor, having a source coupled to the data signal writing module;
- a threshold voltage compensation module, fed with coupled to a second scan signal and the first power signal, and connected to a drain of the driving transistor and a gate of the driving transistor;
- a first initialization module, fed with a control signal and a first initial signal, and connected to the gate of the driving transistor;
- a light emitting control module, fed with a light control signal, the first power signal and the second power signal;
- and
- a coupling capacitor, fed with an adjusting signal and connected to the first initialization module or the threshold voltage compensation module,
- wherein the threshold voltage compensation module comprises:
- a second transistor, having a gate fed with the second scan signal, a source coupled to the gate of the driving transistor, and a drain coupled to a first node;
- a seventh transistor, having a gate fed with the first scan signal, a source coupled to a first node, and a drain coupled to the drain of the driving transistor;
- and
- a first capacitor, fed with the first power signal and coupled to the gate of the driving transistor.
10 more elements
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Dependencies are inferred from the claim text.