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:
Feb. 27, 2018
Filed:
Feb. 11, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Norihiro Shirahata, Chigasaki, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image forming apparatus includes a rotating polygon mirror configured to rotate and reflect the first laser beam and the second laser beam, a first generation unit configured to generate a first signal based on timings at which the respective first laser beams, a second generation unit configured to generate a second signal for determining a timing to form an electrostatic latent image on the second image bearing member with the second laser beam based on the first signal and a correction value, and a calculation unit configured to calculate the correction value based on the output of the detection unit, in which the calculation unit calculates the correction value based on the signal output from the detection unit in a period of time that has passed until the rotating polygon mirror reaches steady rotation since it has started to be driven to rotate.