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:
Aug. 26, 2003
Filed:
Apr. 08, 1999
Junnosuke Kataoka, Toride, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an image reading apparatus for reading an original image, an optimum charge storage time of a line image sensor ( ) in generating shading correction data and an optimum charge storage time of the sensor in reading an original image using the generated data are stored in a storage time setting unit ( ) in correspondence with each of the first reading mode in which the image of an original placed on an original table ( ) is read while moving the sensor and the second reading mode in which the image of an original fed by an ADF one by one is read at a predetermined position while fixing the sensor at the position. To actually read an original image in the first or second reading mode, an optimum value is selected from the plurality of stored storage times and used.