Patent ID: 11935905
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. An imaging system comprising:
an imaging device; and
a signal processing unit that processes a signal output from the imaging device,
wherein the imaging device comprises:
a plurality of pixels arranged in a plurality of rows and a plurality of columns,
wherein each of the plurality of pixels includes:
a light-receiving unit having a plurality of first semiconductor regions of a first conductivity type provided in a surface part of a semiconductor substrate and a second semiconductor region of a second conductivity type provided in the surface part of the semiconductor substrate between the plurality of first semiconductor regions, a plurality of photodiodes each configured between the second semiconductor region and one of the plurality of first semiconductor regions;
a plurality of quenching circuits, each connected to a corresponding one of the plurality of first semiconductor regions; and
a counter unit connected to each of connection nodes between the plurality of first semiconductor regions and the plurality of quenching circuits, the counter unit counting a pulse generated in response to a photon being incident on the light-receiving unit,
wherein the second semiconductor region is provided across a deeper part of the semiconductor substrate than the plurality of first semiconductor regions.