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. 22, 2020
Filed:
Jan. 08, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Tomoharu Sato, Kashiwa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An apparatus decides a supply rate for each control period that comprises a plurality of half periods in an alternating current based on a difference between a target temperature and a temperature detected by a detector. In a case where the same supply rate over a plurality of the control period is decided, a start phase angle that is a reference for a supply start corresponding to the supply rate is decided so that the start phase angle is located outside a prohibited section and a combination of the start phase angle differs for each control period. For each of a plurality of half periods configuring the control period, supply of the alternating current to a heater is started at the start phase angle. When a zero cross point of the alternating current arrives, the supply of the alternating current is stopped.