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:
Jan. 13, 2009
Filed:
Jul. 28, 2005
Kengo Kinumura, Kawasaki, JP;
Kengo Kinumura, Kawasaki, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
It is made possible to effect the reading of image data of four channels (corresponding to four basic colors) without resulting in an increase in the construction of an A/D conversion circuit for three channels (corresponding to three basic colors). In an image reading apparatus provided with photoelectric conversion element arrays-capable of resolving an inputted optical signal into four basic colors and outputting them as analog electrical signals, and an A/D conversion circuitcapable of inputting three analog electrical signals at a time, three or less analog electrical signals are selected from the photoelectric conversion element arrays-at the image reading of one main scanning line and also, a different combination of analog electrical signals are selected at the image reading of two adjacent main scanning lines, and the selected analog electrical signals are outputted to the A/D conversion circuit