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:
Aug. 18, 2020
Filed:
Oct. 21, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Hirohisa Nakajima, Tsukubamirai, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A control circuit determines that there is a failure in a power supply circuit in a case where a voltage detected by a voltage detection circuit when a constant-current control is performed is greater than a first predetermined value and a voltage detected by the voltage detection circuit when the first predetermined value is set as the target voltage in the constant-voltage control is greater than a second predetermined value greater than the first predetermined value and determine that there is an error in a load in a case where the voltage detected by the voltage detection circuit when the constant-current control is performed is greater than the first predetermined value and the voltage detected by the voltage detection circuit when the first predetermined value is set as the target voltage in the constant-voltage control is not greater than the second predetermined value.