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. 13, 2018
Filed:
Nov. 14, 2016
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Hajime Motoyama, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/043 (2006.01); B41J 2/47 (2006.01); H04N 1/113 (2006.01); G03G 15/04 (2006.01); G03G 15/00 (2006.01);
U.S. Cl.
CPC ...
G03G 15/043 (2013.01); B41J 2/47 (2013.01); G03G 15/04072 (2013.01); H04N 1/113 (2013.01); G03G 15/80 (2013.01); G03G 2215/0129 (2013.01); G03G 2215/0404 (2013.01);
Abstract
An image forming apparatus includes switches configured to switch a state of an operation performed by an assist circuit for a current supplied to a light-emitting element, in such a manner that the assist circuit corrects a value of a current supplied from a constant current source to the light-emitting element when a switching current is supplied in at least a period during which laser light scans a photoconductive drum and the assist circuit does not correct a value of a current supplied from the constant current source to the light-emitting element to make laser light incident on a photodiode to control a value of a bias current.