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:
May. 17, 2016
Filed:
Mar. 31, 2015
Brother Kogyo Kabushiki Kaisha, Nagoya, Aichi, JP;
Yuji Hori, Gifu, JP;
Kentaro Sugiyama, Gifu, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, Aichi, JP;
Abstract
An image scanning apparatus is configured to obtain a greatest gray gradation value when the light source illuminates the gray reference member at a first light quantity value, set a second light quantity value such that a gray signal having the gray gradation value is output by the signal conversion unit based on the analog signal output by the photoelectric conversion element belonging to a block identified by the block information when the light source illuminates the gray reference member at the second light quantity value, calculate a shading correction value, scan the image on the original sheet with controlling the light source to illuminate the original sheet in accordance with the second light quantity value, and apply the shading correction to the digital signal output by the signal conversion unit in accordance with the shading correction value.