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:
Sep. 02, 1997
Filed:
Aug. 22, 1995
Toshimi Watanabe, Kanagawa-ken, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An automatic focus adjustment device includes a photoelectric conversion device, a focus state detection device and a photoelectric conversion timing control device. The photoelectric conversion device has a plurality of areas that receive light signals from a photographic optical system and that convert the light signals into electrical signals by accumulating electric charge over accumulation time intervals. The focus state detection device, which is connected to the photoelectric conversion device, receives and detects a focus adjustment state in accordance with the electrical signals. The photoelectric conversion timing control device controls the photoelectric conversion device to match a first accumulation time interval to a second accumulation time interval. As a result, midpoint times of the accumulation time intervals need not be recorded, and memory capacity can thus be reduced.