Invention Grant
- Patent Title: Method for driving a pixel circuit with feedback compensation, a circuit for driving a light-emitting device, and a display apparatus
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Application No.: US16476976Application Date: 2018-08-16
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Publication No.: US11295666B2Publication Date: 2022-04-05
- Inventor: Ran Jiang , Hai Kang , Donghui Wang , Chengchen Yan , Shengfei Ma
- Applicant: HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD. , BOE Technology Group Co., Ltd.
- Applicant Address: CN Anhui; CN Beijing
- Assignee: HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.,BOE Technology Group Co., Ltd.
- Current Assignee: HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.,BOE Technology Group Co., Ltd.
- Current Assignee Address: CN Anhui; CN Beijing
- Agency: Intellectual Valley Law, P.C.
- International Application: PCT/CN2018/100803 WO 20180816
- International Announcement: WO2020/034140 WO 20200220
- Main IPC: G09G3/3233
- IPC: G09G3/3233

Abstract:
The present application discloses a method for driving a pixel circuit. The method includes initializing a voltage setting in a pixel circuit including at least a driving transistor coupled to a light-emitting device and obtaining a first threshold voltage of the driving transistor. The method further includes inputting a first data voltage to the pixel circuit to generate a first driving current independent of the first threshold voltage, to drive light emission of the light-emitting device in a current cycle. Additionally, the method includes generating a compensation voltage via a feedback sub-circuit based on a change of the first driving current upon a second threshold voltage of the light-emitting device. Furthermore, the method includes inputting a second data voltage combined with the compensation voltage as a negative feedback to generate a second driving current to drive light emission of the light-emitting device in a next cycle.
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