US 12,289,548 B2
Pixel array having separate voltage supply lines for pixels and bias circuitry
Yu Arishima, Kanagawa (JP); Koichiro Iwata, Kanagawa (JP); Hiroaki Kameyama, Kanagawa (JP); and Masaki Sato, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Feb. 23, 2023, as Appl. No. 18/173,218.
Claims priority of application No. JP2022-030180 (JP), filed on Feb. 28, 2022.
Prior Publication US 2023/0276147 A1, Aug. 31, 2023
Int. Cl. H04N 25/709 (2023.01); H04N 25/633 (2023.01); H04N 25/78 (2023.01)
CPC H04N 25/709 (2023.01) [H04N 25/633 (2023.01); H04N 25/78 (2023.01)] 17 Claims
OG exemplary drawing
 
1. A photoelectric conversion device comprising:
a pixel array including a plurality of aperture pixels arranged so as to form a plurality of rows and a plurality of columns;
a plurality of signal lines arranged in the pixel array so as to allow readout of signals from the plurality of aperture pixels;
a plurality of current sources connected to the plurality of signal lines, respectively;
a first voltage supply line configured to supply a first reference voltage to the plurality of aperture pixels;
a first pad connected to the first voltage supply line;
a bias circuit configured to supply a bias voltage to the plurality of current sources;
a second voltage supply line electrically separated from the first voltage supply line, and configured to supply a second reference voltage to the bias circuit; and
a second pad connected to the second voltage supply line,
wherein the pixel array further includes a plurality of light-shielded pixels,
the device further comprises:
a second signal line arranged in the pixel array so as to allow readout of signals from the plurality of light-shielded pixels, and
a third voltage supply line configured to supply the second reference voltage to the plurality of light-shielded pixels, and
the third voltage supply line is connected to the second pad.