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. 10, 2020
Filed:
Sep. 05, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Yasuhiko Hirano, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a laser scanner unit configured to scan a photosensitive drum through use of a laser beam deflected by a reflection face of a polygon mirror, an engine controller, and an image controller. The engine controller generates an image formation BD signal synchronized with a BD signal output from the laser scanner unit. The image controller stores in advance, into a ROM, difference information indicating a difference between pulse cycles of image formation BD signals corresponding to respective reflection faces, acquires a difference between pulse cycles of an image formation BD signal output at the time of image formation, and compares the acquired difference with the difference information stored in the ROM to identify a reflection face.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile