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:
Jul. 07, 1992
Filed:
Sep. 15, 1989
Applicant:
Inventors:
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
35821313 ; 35821318 ; 358909 ;
Abstract
In an electronic still camera having a solid-state image pickup device and a mechanical shutter, the interval from the start of charge accumulation to the start of charge readout for odd and even fields may be different, resulting in flicker or line crawl effects. To overcome this problem, the intervals are made the same by detecting the level of a reference signal synchronized with the operation of the shutter, determining whether the levels are the same when the shutter is opened and when the shutter is closed, and, if they are not the same, preventing the application of transfer gate signals to the image pickup device for a predetermined period.