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:
Mar. 04, 2008
Filed:
Apr. 23, 2003
Masanori Akita, Shizuoka, JP;
Shoji Maruyama, Shizuoka, JP;
Masanori Akita, Shizuoka, JP;
Shoji Maruyama, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a picture reading device that is suited for discriminating the type/surface condition of a recording medium while requiring only a small circuit scale and less memory, and an image forming apparatus that uses the picture reading device. In a CMOS area sensor chip having a plurality of photoelectric conversion elements, there is provided a calculating unit for calculating the maximum value, the minimum value, and an average value of digital information related to a photoelectric conversion element in a specific area among the plurality of photoelectric conversion elements. Information calculated by the calculating unit is output in addition to digital information related to the plurality of photoelectric conversion elements.