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US 2023/0419895 A1Published application
Pixel driving circuit and display panel
AssigneeTcl China Star Optoelectronics Technology Co., Ltd.
InventorBin LIU
Life of this patent
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Abstract
A pixel driving circuit proposed in the present application includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a capacitor and a light-emitting device. In the pixel driving circuit, a threshold-voltage compensation is performed on the first transistor, and this can efficiently improve attenuation of electric current of the light-emitting device caused by a drift of threshold voltage of a drive transistor, thereby improving stability of a display panel.
Claims20
A pixel driving circuit, comprising a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a capacitor and a light-emitting device;
- a source of the first transistor is electrically connected to a first node, a drain of the first transistor is electrically connected to a second node, and a gate of the first transistor is electrically connected to a third node;
- the source of the second transistor is fed with the data signal, the drain of the second transistor is electrically connected to the second node, and the gate of the second transistor is fed with the first scan signal;
- the source of the third transistor is electrically connected to a cathode of the light-emitting device, an anode of the light-emitting device is fed with a first power-supply signal, the drain of the third transistor is electrically connected to the first node, and the gate of the third transistor is fed with the first light-emitting control signal;
- the source of the fourth transistor is electrically connected to the second node, the drain of the fourth transistor is fed with a second power-supply signal, and the gate of the fourth transistor is fed with the second light-emitting control signal;
- the source of the fifth transistor is electrically connected to the first node, the drain of the fifth transistor is electrically connected to the third node, and the gate of the fifth transistor is fed with the second scan signal;
- the source of the sixth transistor is fed with the first power-supply signal, the drain of the six transistor is electrically connected to the third node, and the gate of the six transistor is fed with the third scan signal;
- a first end of the capacitor is electrically connected to the third node and a second end of the capacitor is fed with the second power-supply signal.
4 more elements
A display panel, comprising:
- a data line, configured to provide a data signal;
- a first scan line, configured to provide a first scan signal;
- a second scan line, configured to provide a second scan signal;
- a third scan line, configured to provide a third scan signal;
- a first light-emitting control signal line, configured to provide a first light-emitting control signal;
- a second light-emitting control signal line, configured to provide a second light-emitting control signal;
- and
- a pixel driving circuit, connected to the data line, the first scan line, the second scan line, the third scan line, the first light-emitting control signal line and the second light-emitting control signal line;
- the pixel driving circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a capacitor and a light-emitting device;
- a source of the first transistor is electrically connected to a first node, a drain of the first transistor is electrically connected to a second node, and a gate of the first transistor is electrically connected to a third node;
- the source of the second transistor is fed with the data signal, the drain of the second transistor is electrically connected to the second node, and the gate of the second transistor is fed with the first scan signal;
- the source of the third transistor is electrically connected to a cathode of the light-emitting device, an anode of the light-emitting device is fed with a first power-supply signal, the drain of the third transistor is electrically connected to the first node, and the gate of the third transistor is fed with the first light-emitting control signal;
- the source of the fourth transistor is electrically connected to the second node, the drain of the fourth transistor is fed with a second power-supply signal, and the gate of the fourth transistor is fed with the second light-emitting control signal;
- the source of the fifth transistor is electrically connected to the first node, the drain of the fifth transistor is electrically connected to the third node, and the gate of the fifth transistor is fed with the second scan signal;
- the source of the sixth transistor is fed with the first power-supply signal, the drain of the six transistor is electrically connected to the third node, and the gate of the six transistor is fed with the third scan signal;
- a first end of the capacitor is electrically connected to the third node and a second end of the capacitor is fed with the second power-supply signal.
13 more elements
Dependencies are inferred from the claim text.