US 12,088,783 B2
Imaging apparatus and gain ratio acquisition method therefor
Hidenori Tabata, Kanagawa (JP)
Assigned to SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 17/905,782
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Mar. 11, 2021, PCT No. PCT/JP2021/009900
§ 371(c)(1), (2) Date Sep. 7, 2022,
PCT Pub. No. WO2021/187333, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 2020-044937 (JP), filed on Mar. 16, 2020; and application No. 2020-141936 (JP), filed on Aug. 25, 2020.
Prior Publication US 2024/0214551 A1, Jun. 27, 2024
Int. Cl. H04N 17/00 (2006.01); H04N 25/51 (2023.01); H04N 25/69 (2023.01); H04N 25/78 (2023.01)
CPC H04N 17/002 (2013.01) [H04N 25/51 (2023.01); H04N 25/69 (2023.01); H04N 25/78 (2023.01)] 11 Claims
OG exemplary drawing
 
11. A gain ratio acquisition method in an imaging apparatus including a level control circuit which performs, using any of a first gain and a second gain that differ from each other, level control of an analog signal output to a vertical signal line of a plurality of vertical signal lines that corresponds to each column of a pixel array, an analog-digital converter which converts the level-controlled analog signal into a digital signal, and a test signal generating unit which generates a first test signal and a second test signal that differ from each other, the imaging apparatus simultaneously performing:
supplying one of the plurality of vertical signal lines with the first test signal to acquire a gain ratio between the first gain and the second gain of the level control circuit; and
supplying another of the plurality of vertical signal lines with the second test signal to acquire the gain ratio between the first gain and the second gain of the level control circuit.