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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
技術領域
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

A tank circuit 150 is connected between the first node and the second node. The tank circuit 150 is used to store a data voltage that controls a drive current for the light-emitting element 140.

A gate of the driving transistor 160 is connected to the first node, a first electrode of the driving transistor 160 is connected to a second voltage terminal VDD, a second electrode of the driving transistor 160 is connected to the second node, and is configured to drive the light-emitting element 140 to emit light. The driving transistor supplies a current corresponding to a data voltage input on the gate to the light-emitting element 140 to drive it to emit light. The driving transistor 160 is further configured to, when the light-emitting element 140 emits light, enable the sensing signal line to be charged with a second voltage on the second voltage terminal in response to the second scan signal being valid and the reset control signal being invalid. The voltage of the charged sensing signal line is sensed and used for compensation for the data voltage.

FIG. 2 illustrates a compensation method for a pixel circuit according to an embodiment of the present disclosure. The pixel circuit includes a light-emitting element and a driving transistor that drives the light-emitting element to emit light with a driving current. A first electrode of the driving transistor is connected to a second voltage terminal, and a second electrode of the driving transistor is connected to a first terminal of the light-emitting element. A second terminal of the light-emitting element is connected to the first voltage terminal. The compensation method shown in FIG. 2 includes the following steps.

權利要求

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