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:
Oct. 20, 2009
Filed:
Feb. 07, 2005
Applicant:
Yoshinobu Kagami, Kanagawa, JP;
Inventor:
Yoshinobu Kagami, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N 1/40 (2006.01); H04N 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image reader comprises an image sensor configured to receive a light beam reflected from an original to be read and output an analog pixel signal corresponding to a light quantity of the received light beam; a variable-gain amplifier configured to amplify the analog pixel signal to a prescribed level; an analog-to-digital converter configured to convert the amplifier analog pixel signal to digital image data; and correction means for performing correction on the A/D converted digital image data according to a prescribed criterion, using a data value corresponding to an original level of the analog pixel signal before the amplification.