The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 2025
Filed:
Aug. 22, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Takeshi Shimada, Kanagawa, JP;
Keisuke Takahashi, Tokyo, JP;
Keita Masuda, Tokyo, JP;
Hideo Kobayashi, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Photoelectric conversion apparatus includes read circuit for reading signals of pixel array, and signal processing unit for generating pixel signal by performing CDS on signals read by the read circuit and performing shading correction on the pixel signal. The read circuit has function of reading signal of the pixel array with first and second gain. The read circuit reads noise level with the first gain and reads optical signal level with the first or second gain from selected effective pixel for the correlated double sampling. In the shading correction, pixel signal of effective pixel from which optical signal level has been read with the first gain is corrected based on first correction value, and pixel signal of effective pixel from which optical signal level has been read with the second gain is corrected based on second correction value.