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. 09, 2003
Filed:
Apr. 12, 2001
Applicant:
Inventor:
Masato Koshimizu, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/700 ;
U.S. Cl.
CPC ...
H01L 2/700 ;
Abstract
An object of this invention is to read a high-quality image by detecting and correcting dirt, a scratch, or a watermark present on an original in an image reading apparatus for reading an original. To achieve this object, an original illumination unit in the image reading apparatus for reading an original includes a first light source for emitting light in at least the visible region, a second light source for emitting light in only the invisible region, and a light guide plate which has these light sources at an end face and distributes incident light from the end face to the entire flat surface.