公开(公告)号：US11765480B2

公开(公告)日：2023-09-19

申请号：US17582358

申请日：2022-01-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yifan Fu ,  Shan Gao ,  Jiantong Zhou ,  Jing Xiao

IPC: H04N25/75 ,  H04N25/50 ,  H04N25/772

CPC classification number: H04N25/75 ,  H04N25/50 ,  H04N25/772

Abstract: This application provides a pixel collection circuit comprising an optical-to-electrical converter circuit configured to convert a collected optical signal into an analog signal; an analog-to-digital converter circuit configured to: receive the analog signal from the optical-to-electrical converter circuit; and perform analog-to-digital conversion on the analog signal to obtain a digital signal; a differential circuit configured to: receive the digital signal from the analog-to-digital converter circuit; and obtain a difference signal between a digital signal of a previous triggering moment and the digital signal of a current triggering moment; the previous triggering moment and the current triggering moment are determined by at least a digital clock signal; a comparison circuit configured to receive the difference signal from the differential circuit, and output a pulse signal. A digital component is used to implement the pixel collection circuit in the dynamic vision sensor, so as to reduce noise, reduce interference, and facilitate debugging.