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US 2019/0096326 A1Published application
Pixel compensation circuit, driving method, display panel and display device
AssigneesBoe Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Co., Ltd.
InventorsZhidong YUAN, Yongqian LI, Can YUAN, Meng LI, Xuehuan FENG, Zhenfei CAI
Life of this patent
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Abstract
The present disclosure relates to a pixel compensation circuit, a driving method for the pixel compensation circuit, a display panel and a display device. The pixel compensation circuit includes a reset circuit, a data writer, a compensation circuit, a driver, and a light emitting device. The threshold voltage of the light emitting device may be provided to the driver through the compensation circuit.
Claims17
A pixel compensation circuit, comprising a reset circuit, a data writer, a compensation circuit, and a driver;
- wherein:
- a first control terminal of the reset circuit is connected to a first control signal terminal, a second control terminal of the reset circuit is connected to a second control signal terminal, a first input terminal and a second input terminal of the reset circuit are connected to a sensing line, a first output terminal of the reset circuit is connected to a first node, a second output terminal of the reset circuit is connected to a second node, and the reset circuit is configured to provide a reset signal output by the sensing line to the first node and the second node under control of the first control signal terminal and the second control signal terminal;
- a control terminal of the data writer is connected to a third control signal terminal, an input terminal of the data writer is connected to a data line, an output terminal of the data writer is connected to a third node, and the data writer is configured to provide a data signal output by the data line to the third node under control of the third control signal terminal;
- a first terminal of the compensation circuit is connected to the first node, a second terminal of the compensation circuit is connected to the second node, a third terminal of the compensation circuit is connected to the third node, and the compensation circuit is configured to provide a threshold voltage of a light emitting device to the third node;
- and
- a control terminal of the driver is connected to the third node, an input terminal of the driver is connected to a first power supply terminal, an output terminal of the driver is connected to the second node, and the driver is configured to drive the light emitting device to emit light under control of the third node.
3 more elements
A display panel, comprising a pixel compensation circuit;
- wherein the pixel compensation circuit comprises a reset circuit, a data writer, a compensation circuit, and a driver;
- wherein:
- a first control terminal of the reset circuit is connected to a first control signal terminal, a second control terminal of the reset circuit is connected to a second control signal terminal, a first input terminal and a second input terminal of the reset circuit are connected to a sensing line, a first output terminal of the reset circuit is connected to a first node, a second output terminal of the reset circuit is connected to a second node, and the reset circuit is configured to provide a reset signal output by the sensing line to the first node and the second node under control of the first control signal terminal and the second control signal terminal;
- a control terminal of the data writer is connected to a third control signal terminal, an input terminal of the data writer is connected to a data line, an output terminal of the data writer is connected to a third node, and the data writer is configured to provide a data signal output by the data line to the third node under control of the third control signal terminal;
- a first terminal of the compensation circuit is connected to the first node, a second terminal of the compensation circuit is connected to the second node, a third terminal of the compensation circuit is connected to the third node, and the compensation circuit is configured to provide a threshold voltage of a light emitting device to the third node;
- and
- a control terminal of the driver is connected to the third node, an input terminal of the driver is connected to a first power supply terminal, an output terminal of the driver is connected to the second node, and the driver is configured to drive the light emitting device to emit light under control of the third node.
4 more elements
A driving method for a pixel compensation circuit, wherein the pixel compensation circuit comprises a reset circuit, a data writer, a compensation circuit, and a driver;
- wherein:
- a first control terminal of the reset circuit is connected to a first control signal terminal, a second control terminal of the reset circuit is connected to a second control signal terminal, a first input terminal and a second input terminal of the reset circuit are connected to a sensing line, a first output terminal of the reset circuit is connected to a first node, a second output terminal of the reset circuit is connected to a second node, and the reset circuit is configured to provide a reset signal output by the sensing line to the first node and the second node under control of the first control signal terminal and the second control signal terminal;
- a control terminal of the data writer is connected to a third control signal terminal, an input terminal of the data writer is connected to a data line, an output terminal of the data writer is connected to a third node, and the data writer is configured to provide a data signal output by the data line to the third node under control of the third control signal terminal;
- a first terminal of the compensation circuit is connected to the first node, a second terminal of the compensation circuit is connected to the second node, a third terminal of the compensation circuit is connected to the third node, and the compensation circuit is configured to provide a threshold voltage of a light emitting device to the third node;
- and
- a control terminal of the driver is connected to the third node, an input terminal of the driver is connected to a first power supply terminal, an output terminal of the driver is connected to the second node, and the driver is configured to drive the light emitting device to emit light under control of the third node;
- wherein the method comprises:
- in a first data writing stage, resetting by the reset circuit a potential at the second terminal of the compensation circuit under control of the second control terminal, and writing by the data writer a first data signal output by the data line to the compensation circuit under control of the third control signal terminal;
- in a compensation stage, providing by the compensation circuit the first data signal and the threshold voltage of the light emitting device to the control terminal of the driver;
- in a reset stage, resetting by the reset circuit a potential at the first terminal of the compensation circuit under control of the first control signal terminal, and resetting by the reset circuit a potential at the output terminal of the driver under control of the second control signal terminal;
- and
- in a light emitting stage, driving by the driver the light emitting device to emit light under joint control of the threshold voltage of the light emitting device and the first data signal.
9 more elements
Dependencies are inferred from the claim text.