US 11,943,550 B2
Dual-modality neuromorphic vision sensor
Luping Shi, Beijing (CN); Zheyu Yang, Beijing (CN); Rong Zhao, Beijing (CN); Jing Pei, Beijing (CN); and Haizheng Xu, Beijing (CN)
Assigned to TSINGHUA UNIVERSITY, Beijing (CN)
Appl. No. 17/788,909
Filed by TSINGHUA UNIVERSITY, Beijing (CN)
PCT Filed Jan. 21, 2020, PCT No. PCT/CN2020/073523
§ 371(c)(1), (2) Date Jun. 24, 2022,
PCT Pub. No. WO2021/128533, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 201911348653.8 (CN), filed on Dec. 24, 2019.
Prior Publication US 2023/0033544 A1, Feb. 2, 2023
Int. Cl. H04N 25/702 (2023.01); G06V 10/147 (2022.01); H04N 25/13 (2023.01); H04N 25/47 (2023.01); H04N 25/53 (2023.01); H04N 25/75 (2023.01); H04N 25/77 (2023.01)
CPC H04N 25/702 (2023.01) [G06V 10/147 (2022.01); H04N 25/53 (2023.01); H04N 25/75 (2023.01); H04N 25/77 (2023.01); H04N 25/134 (2023.01)] 10 Claims
OG exemplary drawing
 
1. A dual-modality neuromorphic vision sensor, comprising a first-type current-mode active pixel sensor (APS) circuit and a voltage-mode APS circuit;
the first-type current-mode APS circuit comprises a target first-type photosensitive device; and the target first-type photosensitive device is configured to obtain a target light signal, and convert the target light signal into a first-type current signal, and the first-type current-mode APS circuit is configured to output, based on a difference between the first-type current signal and a sum of second-type current signals converted by a first preset quantity of non-target first-type photosensitive devices around the target first-type photosensitive device, a specified digital signal representing light intensity gradient information in the target light signal;
the voltage-mode APS circuit comprises a second-type photosensitive device, the second-type photosensitive device is configured to obtain the target light signal, extract a light signal of a specified frequency band from the target light signal, and convert the light signal of the specified frequency band into a third-type current signal, and the voltage-mode APS circuit is configured to output, based on the third-type current signal, a target voltage signal representing light intensity information in the target light signal;
wherein, each of the non-target first-type photosensitive devices is connected to a first-type control switch in series.