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:
Apr. 16, 1991
Filed:
Aug. 14, 1989
Keita Kimura, Kawasaki, JP;
Tetsuya Yamamoto, Hasuda, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An electronic still camera comprises a photoelectric converting device for converting light from an object into an electrical signal; an amplifying-recording device for amplifying the electrical signal and for recording the amplified signal on a recording medium; a selecting device for selecting one of plural amplification gains so that the amplifying-recording device amplifies the electrical signal on the basis of the selected amplification gain; an exposure time in accordance with the selected amplification gain and the luminance of an object to be photographed; and a determining device for determining a longest permissible exposure time, irrespective of the luminance of the object, in accordance with the selected amplification gain. If the calculated exposure time is longer than the longest permissible exposure time, an alarm is given and/or the calculated exposure time is reduced.