US 12,348,891 B2
Radiation imaging apparatus and radiation imaging system
Shuichi Fujita, Kanagawa (JP); Hideyuki Okada, Saitama (JP); Kentaro Fujiyoshi, Irvine, CA (US); Yoshiaki Serizawa, Kanagawa (JP); and Ryunosuke Bannai, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jan. 12, 2023, as Appl. No. 18/153,844.
Claims priority of application No. 2022-013578 (JP), filed on Jan. 31, 2022.
Prior Publication US 2023/0247170 A1, Aug. 3, 2023
Int. Cl. H04N 5/32 (2023.01); H04N 25/75 (2023.01)
CPC H04N 5/32 (2013.01) [H04N 25/75 (2023.01)] 12 Claims
OG exemplary drawing
 
1. A radiation imaging apparatus comprising: a plurality of pixels arranged to form a plurality of rows and a plurality of columns; a drive circuit configured to control the plurality of pixels via a plurality of drive lines arranged to extend in a row direction; a detection circuit configured to detect a start of radiation irradiation in accordance with signals output from the plurality of pixels; and a drive controller,
wherein the drive circuit comprises a plurality of terminals, and is configured to perform a shift operation of sequentially outputting an activation signal from each of the plurality of terminals one by one in accordance with a shift clock in response to each of a plurality of start signals including a first start signal and a second start signal, which are supplied from the drive controller,
the plurality of terminals include a first terminal group that is connected to the plurality of drive lines and is configured to continuously output the activation signal for activating the plurality of drive lines, and a second terminal group that is not connected to the plurality of drive lines,
the first terminal group includes a first terminal configured to output the activation signal first in the first terminal group and a second terminal configured to output the activation signal at last in the shift operation, and
during a period until the detection circuit detects the start of radiation irradiation,
the drive controller is configured to supply the second start signal to the drive circuit before the shift operation according to the first start signal ends, and
the drive circuit is configured to output the activation signal from the second terminal in the shift operation according to the first start signal and then outputs the activation signal from the first terminal in the shift operation according to the second start signal.