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1. (WO2018086342) PIXEL SENSING CIRCUIT, DRIVING METHOD THEREOF, IMAGE SENSOR, AND ELECTRONIC DEVICE

Pub. No.:    WO/2018/086342    International Application No.:    PCT/CN2017/087181
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Tue Jun 06 01:59:59 CEST 2017
IPC: H04N 5/374
Applicants: BOE TECHNOLOGY GROUP CO., LTD.
京东方科技集团股份有限公司
Inventors: YANG, Shengji
杨盛际
DONG, Xue
董学
LV, Jing
吕敬
CHEN, Xiaochuan
陈小川
LIU, Dongni
刘冬妮
WANG, Lei
王磊
LU, Pengcheng
卢鹏程
FU, Jie
付杰
YUE, Han
岳晗
XIAO, Li
肖丽
Title: PIXEL SENSING CIRCUIT, DRIVING METHOD THEREOF, IMAGE SENSOR, AND ELECTRONIC DEVICE
Abstract:
A pixel sensing circuit (400), a driving method thereof, an image sensor, and an electronic device. The pixel sensing circuit (400) comprises a photoelectric conversion element (PD) for generating a charge in response to incident light, a transmission element (T3) for outputting the charge generated by the photoelectric conversion element (PD), and a source follower circuit (M1, M2, C1) for compensating an output current of the transmission element (T3). The source follower circuit (M1, M2, C1) comprises a first source follower transistor (M1), a second source follower transistor (M2), and a first storage capacitor (C1). The first source follower transistor (M1) and the second source follower transistor (M2) have equal threshold voltages. A gate and an output end of the first source follower transistor (M1), a gate of the second source follower transistor (M2), and a first end of the first storage capacitor (C1) are all coupled to a first node (a). A second end of the first storage capacitor (C1) and an input end of the second source follower transistor (M2) are coupled to a power voltage line (Vdd).