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:
Jul. 22, 2014
Filed:
Jun. 13, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Ryo Mikami, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image reading apparatus includes: a light source to illuminate an original; a color sensor and a monochrome sensor to receive light reflected from the original illuminated by the light source to output an image signal; an amplifier to amplify the image signal from the color and monochrome sensors; a reflective reference member; and a control circuit to adjust a gain of the amplifier amplifying the image signal from the color sensor that receives light reflected from the reflective member illuminated by the light source, and holds the adjusted gain as a gain setting value for the color sensor, and the control circuit obtains a gain setting value for the monochrome sensor by calculation based on the gain setting value for the color sensor.