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Pixel circuit, compensation method for pixel circuit and display device

專利號
US10867554B2
公開日期
2020-12-15
申請人
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 further 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 the data signal terminal, and a second electrode of the first switching transistor is connected to the gate of the driving transistor. The data writing phase comprises: applying a first level signal on the first scan signal terminal to control the first switching transistor to turn on, and applying the data signal on the data signal terminal so as to input the data signal to the gate of the driving transistor.

Optionally, the second switching circuit further 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 the second node, and a second electrode of the second switching transistor is connected to the sensing signal line. The data writing phase comprises: applying a first level signal on the second scan signal terminal to control the second switching transistor to turn on, and applying a reset voltage on the sensing signal line so as to input the reset voltage to the second node.

Optionally, the data writing phase comprises: before inputting the data signal to the gate of the driving transistor, applying the first level signal on the second scan signal terminal to control the second switching transistor to turn on, and applying the reset voltage on the sensing signal line so as to input the reset voltage to the second node.

權(quán)利要求

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