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:
Aug. 15, 1995
Filed:
Jun. 12, 1992
Masaaki Ito, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A level-controlling-quantity setting apparatus sets a level-controlling-quantity so as to make it correspond to a level of output of a photoelectric conversion device. A level controlling apparatus controls output of the photoelectric conversion device so as to make a level of the output correspond to the level-controlling-quantity. A dark-state-output correction apparatus corrects output of the photoelectric conversion device by means of a dark-state-output, the dark-state-output being obtained by a process such that output of said photoelectric conversion device is controlled by means of said level controlling apparatus with a level-controlling-quantity, the level-controlling-quantity being same as a level-controlling-quantity used during a previous-image-reading-state.