US 12,313,459 B2
Photodetection device and photodetector
Futa Mochizuki, Kanagawa (JP)
Assigned to Sony Semiconductor Solutions Corporation, Kanagawa (JP)
Appl. No. 18/579,661
Filed by Sony Semiconductor Solutions Corporation, Kanagawa (JP)
PCT Filed Mar. 3, 2022, PCT No. PCT/JP2022/009162
§ 371(c)(1), (2) Date Jan. 16, 2024,
PCT Pub. No. WO2023/026524, PCT Pub. Date Mar. 2, 2023.
Claims priority of application No. 2021-138211 (JP), filed on Aug. 26, 2021.
Prior Publication US 2024/0328854 A1, Oct. 3, 2024
Int. Cl. G01J 1/44 (2006.01)
CPC G01J 1/44 (2013.01) 20 Claims
OG exemplary drawing
 
1. A photodetection device comprising:
a plurality of pixels each including a light-receiving element, a generation circuit configured to generate a light-receiving signal corresponding to an amount of light received by the light-receiving element, and a change detection circuit configured to detect an amount of a change in the light-receiving signal;
a selector circuit configured to couple one of a plurality of the change detection circuits in the plurality of pixels to a coupling node;
a bias circuit coupled to the coupling node; and
a comparison circuit configured to generate an event signal by comparing a signal in the coupling node and a predetermined threshold with each other.