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. 17, 2015
Filed:
Jun. 16, 2014
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Tsutomu Ishida, Mishima, JP;
Shunichi Ebihara, Suntou-gun, JP;
Norio Matsui, Mishima, JP;
Shoichi Koyama, Susono, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/00 (2006.01); B41J 2/47 (2006.01); H04N 5/225 (2006.01); B41J 11/00 (2006.01);
U.S. Cl.
CPC ...
B41J 2/47 (2013.01); B41J 11/009 (2013.01); G03G 15/5029 (2013.01); H04N 5/2256 (2013.01); G03G 2215/00616 (2013.01); G03G 2215/00751 (2013.01);
Abstract
An effective image area can be properly corrected in accordance with the quantity of light from an irradiation unit by selecting, as the effective image area, pixels having light quantities more than or equal to a threshold value that allows accurate acquisition of a surface image of a recording medium, on the basis of a light quantity distribution of the light from the irradiation unit. This reduces the influence of mounting accuracy of the irradiation unit, and allows the recording medium to be identified accurately.