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:
Nov. 19, 2019
Filed:
Apr. 05, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Hirokazu Kobayashi, Tokyo, JP;
Nobuhiro Takeda, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
In a pixel section of an image sensor, pixels are arranged two-dimensionally, each of the pixels including an amplifier transistor that is connected to a power voltage and has a gate into which a voltage of a signal charge generated by a photoelectric conversion area is input and a selection transistor that is connected to the amplifier transistor and a signal line. The image sensor includes an AD conversion circuit having a reference transistor having a gate into which a ramp signal is input and a constant current source that is connected to the reference transistor and the signal line. The voltage of the ramp signal or a driving ability of the reference transistor changes depending on whether one selection transistor or a plurality of selection transistors is/are turned on per signal line to obtain a signal charge to be AD-converted.