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US 12,223,892 B2Granted
Pixel circuit and display panel
AssigneeWuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorsMian Zeng, Liang Sun
Life of this patent
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Abstract
Disclosed are a pixel circuit and a display panel. The pixel circuit includes a Light emitting device, a Data signal write-in module, a Driving transistor, a Compensation module, a First initialization module, and a Light emitting control module. The first initialization module is electrically connected to the compensation module and electrically connected to the gate of the driving transistor through the compensation module. When the voltage level of the gate of the driving transistor, the number of the transistors connected to the driving transistor could be reduced.
Claims16
A pixel circuit, comprising:
- a light emitting device, having two ends electrically connected to a first power signal and a second power signal;
- a data signal write-in module, configured to output a data signal in response to a first scan signal;
- a driving transistor, having a first electrode electrically connected to the data signal write-in module;
- a compensation module, electrically connected to a second electrode of the driving transistor and a gate of the driving transistor, configured to receive a second scan signal and the first power signal;
- a first initialization module, electrically connected to the compensation module, configured to receive a third scan signal and a first initialization signal;
- and
- a light emitting control module, connected in series between the first power signal and the second power signal, configured to receive a light emitting control signal;
- wherein the pixel circuit has a first working mode and a second working mode, and a display frequency of the first working mode is greater than a display frequency of the second working mode;
- and
- wherein the first initialization signal is a DC signal in the first working mode and the first initialization signal is an AC signal in the second working mode.
7 more elements
A pixel circuit, comprising:
- a first transistor, having a gate receiving a first scan signal and a source receiving a data signal;
- a driving transistor, having a source electrically connected to a drain of the first transistor;
- a second transistor, having a first gate and a second gate receiving a second scan signal, a source electrically connected to a drain of the driving transistor, and a drain electrically connected to a gate of the driving transistor;
- a third transistor, having a gate receiving a third scan signal, a source receiving a first initialization signal, and a drain electrically connected to the drain of the second transistor;
- a fourth transistor, having a gate receiving a light emitting control signal, a source receiving a first power signal and a drain electrically connected to the source of the driving transistor;
- a fifth transistor, having a gate receiving the light emitting control signal and a source electrically connected to the drain of the driving transistor;
- a first capacitor, having an end electrically connected to the gate of the driving transistor, and another end receiving a first power signal;
- and
- a light emitting device, having a positive electrode electrically connected to a drain of the fifth transistor, and a second electrode receiving a second power signal;
- wherein the pixel circuit has a first working mode and a second working mode, and a display frequency of the first working mode is greater than a display frequency of the second working mode;
- and
- wherein the first initialization signal is a DC signal in the first working mode and the first initialization signal is an AC signal in the second working mode.
9 more elements
A display panel, comprising a plurality of pixel units arranged in an array, each of the pixel units comprising a pixel circuit, the pixel circuit comprising:
- a first transistor, having a gate receiving a first scan signal and a source receiving a data signal;
- a driving transistor, having a source electrically connected to a drain of the first transistor;
- a second transistor, having a first gate and a second gate receiving a second scan signal, a source electrically connected to a drain of the driving transistor, and a drain electrically connected to a gate of the driving transistor;
- a third transistor, having a gate receiving a third scan signal, a source receiving a first initialization signal, and a drain electrically connected to the drain of the second transistor;
- a fourth transistor, having a gate receiving a light emitting control signal, a source receiving a first power signal and a drain electrically connected to the source of the driving transistor;
- a fifth transistor, having a gate receiving the light emitting control signal and a source electrically connected to the drain of the driving transistor;
- a first capacitor, having an end electrically connected to the gate of the driving transistor, and another end receiving a first power signal;
- and
- a light emitting device, having a positive electrode electrically connected to a drain of the fifth transistor, and a second electrode receiving a second power signal;
- wherein the pixel circuit has a first working mode and a second working mode, and a display frequency of the first working mode is greater than a display frequency of the second working mode;
- and
- wherein the first initialization signal is a DC signal in the first working mode and the first initialization signal is an AC signal in the second working mode.
9 more elements
Dependencies are inferred from the claim text.