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Pixel circuit, compensation method for pixel circuit and display device

專利號(hào)
US10867554B2
公開日期
2020-12-15
申請(qǐng)人
Hefei Xinsheng Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd.(CN Hefei CN Beijing)
發(fā)明人
Min He; Song Meng; Fei Yang; Chun Cao; Xiaolong Wei
IPC分類
G09G3/3233; G09G3/3266; G09G3/3275
技術(shù)領(lǐng)域
voltage,transistor,signal,reset,scan,emitting,terminal,sensing,tft3,switching
地域: Anhui

摘要

The present disclosure relates to a pixel circuit, a compensation method and a display device. The pixel circuit includes a first switching circuit for supplying a data voltage to a first node in response to a first scan signal being valid, a second switching circuit for conductively connecting a sensing signal line with a second node in response to a second scan signal being valid, a reset circuit for supplying a reset voltage to the sensing signal line in response to a reset control signal being valid, a light-emitting element, and a driving transistor for enabling, when the light-emitting element emits light, the sensing signal line to be charged in response to the second scan signal being valid and the reset control signal being invalid, the voltage of the sensing signal line is sensed after it was charged so as to compensate the data voltage.

說明書

Optionally, the first switching circuit comprises a first switching transistor. A gate of the first switching transistor is connected to the first scan signal terminal, a first electrode of the first switching transistor is connected to a data signal terminal, and a second electrode of the first switching transistor is connected to the gate of the driving transistor.

Optionally, the second switching circuit comprises a second switching transistor. A gate of the second switching transistor is connected to the second scan signal terminal, a first electrode of the second switching transistor is connected to an anode of the light-emitting element, and a second electrode of the second switching transistor is connected to the sensing signal line.

Optionally, the reset circuit comprises a reset switch. A control terminal of the reset switch is connected to the reset control terminal, a first terminal of the reset switch is connected to the reset signal terminal, and a second terminal of the reset switch is connected to the sensing signal line.

Optionally, the reset control terminal is connected to a driving chip. The driving chip is configured to provide the reset control signal to control whether to provide a reset voltage to the sensing signal line.

Optionally, the tank circuit is configured to utilize its stored data voltage to make the driving transistor turn on in response to the first scan signal being invalid and the reset control signal being invalid during a voltage sensing phase.

權(quán)利要求

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