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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.:

US 10191403 B1

PDFFull Text
Date of Patent:
Jan. 29, 2019

Filed:

Nov. 01, 2017

Image forming apparatus

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventors:

Naoka Omura, Matsudo, JP;

Koichi Taniguchi, Tokyo, JP;

Daisuke Aruga, Abiko, JP;

Assignee:

CANON KABUSHIKI KAISHA, Tokyo, JP;

Attorney:

Venable LLC

Primary Examiner:

Gregory H Curran

Int. Cl.
CPC ...
G03G 15/01 (2006.01); G03G 15/04 (2006.01); G03G 15/00 (2006.01); G03G 15/16 (2006.01); G03G 15/18 (2006.01); G06K 15/00 (2006.01); G06K 15/02 (2006.01); G03G 21/20 (2006.01);
U.S. Cl.
CPC ...
G03G 15/0189 (2013.01); G03G 15/0409 (2013.01); G03G 15/04072 (2013.01); G03G 15/5045 (2013.01); G03G 15/5058 (2013.01); G06K 15/1878 (2013.01); G03G 15/1615 (2013.01); G03G 21/20 (2013.01); G03G 2215/0158 (2013.01);
Abstract

An image forming apparatus including a controller, which starts rotation of a rotary polygon mirror when a predetermined condition is satisfied, rotates the rotary polygon mirror at a predetermined rotation speed based on a first pulse in a first state in which light beams are not emitted from a light source, thereafter starts emission of the light beams, switches a rotation control based on the first pulse to a rotation control based on the second pulse, and rotates the rotary polygon mirror at the predetermined rotation speed based on the second pulse in a second state in which the light beams are emitted from the light source, and thereafter detects a temperature of a drive circuit board by a temperature detector, and corrects color misregistration using a detected temperature of the temperature detector and the detection result of a pattern detector.

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