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:
Jun. 17, 2003
Filed:
Nov. 30, 1999
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A reading scan controlling unit drives a scanning motor in accordance with a signal from a reading instructing unit and a line synchronous generating unit for scanning a document plural times in a slow-scanning direction, as well as controls a sensor driver to read a document image. At this time, an optical flat plate driving unit is controlled in the second and following scans to incline an optical flat plate provided in an imaging optical path at a predetermined angle in a fast-scanning direction, so that the imaging position on a CCD sensor in a fast-scanning direction is slightly changed. Further, the scanning speed is determined in accordance with the scanning times. An image reading device having such a construction can perform high-speed reading with high precision by using an image shift method.