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:
Dec. 18, 2012
Filed:
Mar. 21, 2007
Image reading apparatus, shading correction method therefor, and program for implementing the method
Jun Tanaka, Chichibu, JP;
Takashi Machida, Niiza, JP;
Shinobu Kato, Yokohama, JP;
Keiji Tsutaoka, Tokyo, JP;
Taketo Ochiai, Tokyo, JP;
Masahiro Shirai, Tokyo, JP;
Shigeru Ikezaki, Wako, JP;
Hirotaka Watanabe, Koganei, JP;
Jun Tanaka, Chichibu, JP;
Takashi Machida, Niiza, JP;
Shinobu Kato, Yokohama, JP;
Keiji Tsutaoka, Tokyo, JP;
Taketo Ochiai, Tokyo, JP;
Masahiro Shirai, Tokyo, JP;
Shigeru Ikezaki, Wako, JP;
Hirotaka Watanabe, Koganei, JP;
Canon Denshi Kabushiki Kaisha, Saitama-Ken, JP;
Abstract
An image reading apparatus including a shading correction mechanism that can be formed by fewer component parts than conventional ones, and is increased in the degree of freedom of design, thereby enabling reduction of the size and weight thereof. A contact glass guides an original to an image reading position. A glass holding member holds the glass. A line image sensor reads an image on the original conveyed to the image reading location, through the contact glass. A reference member is disposed at a location different from the image reading location on the contact glass. A moving mechanism relatively moves the line image sensor and the reference member so that the line image sensor can alternatively read the original conveyed to the image reading location and the reference member. A drive section externally drives the moving mechanism to move the line image sensor and/or the reference member.