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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 10481518 B1

PDFFull Text
Expired
Date of Patent:
Nov. 19, 2019

Filed:

Mar. 06, 2017

Image forming apparatus which changes time period for masking detection of period of rotation synchronous signal

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventors:

Takahiro Kamikura, Tokyo, JP;

Satoru Takezawa, Abiko, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Venable LLP

Primary Examiner:

Robert B Beatty

Int. Cl.
CPC ...
G03G 15/04 (2006.01); G06K 15/00 (2006.01); G02B 26/00 (2006.01); H04N 1/00 (2006.01); G03G 15/043 (2006.01); G02B 26/12 (2006.01); H04N 1/047 (2006.01); H04N 1/053 (2006.01); H04N 1/04 (2006.01); G06K 15/12 (2006.01);
U.S. Cl.
CPC ...
G03G 15/043 (2013.01); G02B 26/122 (2013.01); G06K 15/1219 (2013.01); H04N 1/0443 (2013.01); H04N 1/0473 (2013.01); H04N 1/053 (2013.01);
Abstract

An image forming apparatus including: a drive motor configured to rotate a rotary polygon mirror to deflect light beam; a signal generation unit configured to generate a rotation synchronous signal; and a rotation control unit configured to control a rotation speed of the rotary polygon mirror, wherein the rotation control unit executes a masking processing of masking control of the drive motor based on the rotation synchronous signal, wherein a time period of a first masking processing for a first rotation speed is shorter than a time period of a second masking processing for the second rotation speed, and wherein when the rotation speed of the rotary polygon mirror is changed from the first rotation speed to the second rotation speed, the rotation control unit switches the masking processing from the first masking processing to the second masking processing after reduction of the rotation speed of the rotary polygon mirror is started.

Find Patent Forward Citations

Kamikura, Takahiro. (2019). Image forming apparatus which changes time period for masking detection of period of rotation synchronous signal (U.S. Patent No. 10481518). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10481518

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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