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:
Jul. 10, 2012
Filed:
Jun. 29, 2010
Sadao Fujita, Tokyo, JP;
Sadao Fujita, Tokyo, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
An image forming apparatus capable of identifying the amount of reflected light from any portion of an image carrier in a short time. A sensor detects reflected light from an intermediate transfer belt. A CPU performs pattern matching between the amount of reflected light from the belt corresponding to one rotation thereof and the amount of reflected light from a specific portion of the belt to thereby identify a first circumferential location of the specific portion and a second circumferential location of a toner patch formed on the belt. The CPU calculates toner patch density based on the amount of reflected light from the toner patch and the amount of reflected light from the belt in the second circumferential location. The density of a toner image to be formed on the belt is controlled according to the calculated toner patch density.