US 12,294,792 B2
Photoelectric conversion device having photoelectric conversion circuit responsive to incidence of photon, image capturing device, control method, and storage medium
Kenta Igarashi, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 19, 2022, as Appl. No. 17/933,337.
Claims priority of application No. 2021-155377 (JP), filed on Sep. 24, 2021.
Prior Publication US 2023/0109506 A1, Apr. 6, 2023
Int. Cl. H04N 25/62 (2023.01); H04N 25/50 (2023.01)
CPC H04N 25/62 (2023.01) [H04N 25/50 (2023.01)] 16 Claims
OG exemplary drawing
 
1. A photoelectric conversion device having a pixel including a photoelectric conversion circuit configured to output a signal in response to incidence of a photon, the photoelectric conversion device comprising:
a first measurement circuit configured to measure the signal output from the pixel;
a second measurement circuit configured to measure a time from when the first measurement circuit starts to measure the signal until when a measurement value of the first measurement circuit reaches a first threshold; and
a change circuit configured to change, for at least one of a plurality of the pixels, an upper measurement limit value up to which the signal is countable,
wherein the change circuit increases the upper measurement limit value of the pixel corresponding to the first measurement circuit having the largest measurement value among a plurality of the first measurement circuits.