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1. (WO2018126748) PROTECTION CIRCUIT, METHOD, PIXEL CIRCUIT AND DISPLAY DEVICE

Pub. No.:    WO/2018/126748    International Application No.:    PCT/CN2017/104718
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Sun Oct 01 01:59:59 CEST 2017
IPC: G09G 3/00
Applicants: BOE TECHNOLOGY GROUP CO. , LTD.
京东方科技集团股份有限公司
Inventors: LU, Pengcheng
卢鹏程
CHEN, Xiaochuan
陈小川
YANG, Shengji
杨盛际
WANG, Lei
王磊
LIU, Dongni
刘冬妮
FU, Jie
付杰
XIAO, Li
肖丽
YUE, Han
岳晗
GAO, Jian
高健
LI, Changfeng
李昌峰
Title: PROTECTION CIRCUIT, METHOD, PIXEL CIRCUIT AND DISPLAY DEVICE
Abstract:
Disclosed are a protection circuit (1), a pixel circuit, a driving method therefor, and a display device. The protection circuit (1) comprises a determination circuit (2), a first coupling circuit (3), a first end (4) and a second end (5), wherein the determination circuit (2) is coupled to the first end (4) and the first coupling circuit (3), and is configured to determine whether a voltage of the first end (4) of the protection circuit (1) falls within one of a first pre-determined range and a second pre-determined range; and the first coupling circuit (3) is coupled to the first end (4), the second end (5) and the determination circuit (2), and is configured to respond to the case where the voltage of the first end (4) falls within the first pre-determined range, and couple the first end (4) to the second end (5), and respond to the case where the voltage of the first end (4) falls within the second pre-determined range and decouple the first end (4) and the second end (5). The protection circuit (1) can determine a working state of the pixel circuit by means of detecting a voltage, and cut off a current path in the pixel circuit when discovering a fault.