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:
Apr. 13, 2004
Filed:
Dec. 02, 1999
Satoshi Segawa, Tokyo, JP;
Masato Iwakawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
There is disclosed an image input method, comprising the steps of: forming an image of a linear area on an original onto a row of linearly arranged light receiving elements of a linear image sensor by a lens, and outputting an image signal of the linear image formed on the light receiving elements from the linear image sensor. Moreover, the linear area formed into the image on the linear image sensor is moved by a sub-scanning mechanism to scan the entire image of the original. The linear image sensor further outputs a flicker detection signal having a voltage corresponding to a lighting light quantity radiating to the original. Assuming that a photoelectric conversion property of the linear image sensor is linear, a correcting section eliminates a voltage fluctuation of the image signal based on a fluctuation of the lighting light quantity based on the flicker detection signal. In this case, a voltage for eliminating an influence by nonlinearity of the photoelectric conversion property of the linear image sensor is added to the image signal or the flicker detection signal inputted to the correcting section by an image signal correction circuit.