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. 06, 2014
Filed:
Sep. 11, 2009
Jae Kyu Lee, Seoul, KR;
Sung Eun NO, Seoul, KR;
Jae Kyu Lee, Seoul, KR;
Sung Eun No, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
An image reading device having an improved shading compensation capability and a method thereof are disclosed. The image reading device includes an automatic document feed unit to deliver documents along a document delivery path. A light source unit including a light source to illuminate a first criterion image at a first position within the image reading device, and to illuminate the documents delivered by the automatic document feed unit at a second position. The image reading device further includes a second criterion image arranged to opposingly face the light source unit when the light source unit is located at the second position. The second criterion image extends along a sufficient length to cover the scanning range of the light illumination by the light source unit along a main scanning direction. An image acquisition unit is provided to acquire criterion shading data, auxiliary shading data and image data by receiving light reflected from the first criterion image, the second criterion image and the documents, respectively. A control unit is able to update the criterion shading data using the auxiliary shading data, and to use the updated criterion shading data to compensate the image data.