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:
Mar. 22, 2022
Filed:
Mar. 19, 2021
Canon Kabushiki Kaisha, Tokyo, JP;
Yusuke Yamashita, Kanagawa, JP;
Yasuhiro Itoh, Kanagawa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
In order to improve linearity characteristics in synthesis processing for expanding a dynamic range, an image pickup apparatus comprising an AD conversion unit for performing AD conversion of input signals by comparing a first ramp signal or a second ramp signal; a first synthesis unit for synthesizing a first signal AD converted using the first ramp signal and a second signal AD converted using the second ramp signal; a first correction unit for correcting a level difference between the first signal and the second signal when the first signal and the second signal are synthesized; an amplifier for amplifying pixel signals by different gains; a second synthesis unit for synthesizing the signals amplified by the different gains; and a second correction unit for correcting a level difference between the signals amplified by the different gains when the signals amplified by the different gains are synthesized.