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. 16, 1990
Filed:
Aug. 11, 1988
Shigeru Fukuyama, Yokohama, JP;
Tadashi Okino, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image input apparatus having a lens unit and a photoelectric transducer and includes an automatic exposure circuit for controlling an amount of exposure onto the photoelectric transducer so that it becomes a predetermined standard value, a correction circuit for modifying the standard value, and a reset circuit for converting a correction value corrected by the correction circuit into the aforementioned standard value. Also provided is a controller for selecting a first mode for modifying data representing an amount of light exposure on the photoelectric transducer, and a second mode for modifying data representing a focal length of the lens unit. The reset circuit further includes a common increase/decrease change-over switch for increasing and decreasing corresponding data in each mode selected by the controller.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile