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. 18, 2014
Filed:
Mar. 07, 2011
Keita Takahashi, Abiko, JP;
Atsushi Otani, Moriya, JP;
Shoji Takeda, Tokyo, JP;
Satoru Yamamoto, Abiko, JP;
Hirotaka Seki, Tokyo, JP;
Keita Takahashi, Abiko, JP;
Atsushi Otani, Moriya, JP;
Shoji Takeda, Tokyo, JP;
Satoru Yamamoto, Abiko, JP;
Hirotaka Seki, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present image forming apparatus includes a first control unit and a second control unit driven by built-in clock oscillators to realize the distributed control. The first control unit generates, using a first timer driven by the built-in clock oscillator of the first control unit, a pulse signal corresponding to a predetermined clock rate and outputs the pulse signal to the second control unit. The second control unit measures, using a second timer driven by the built-in clock oscillator of the second control unit, a pulse width of the pulse signal outputted from the first control unit, and calculates a correction coefficient using reference pulse width corresponding to the predetermined clock rate and the measured pulse width. The processing unit processes using the calculated correction coefficient.