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:
Nov. 20, 1984
Filed:
Jun. 22, 1983
Gerhard Krumrein, Neuenstadt, DE;
Hartmut Hantsch, Bad Friedrichshall, DE;
Telefunken Electronic GmbH, Heilbronn, DE;
Abstract
The invention relates to a circuit for a computerized photoflash control which is supplied, preferably with the aid of a photographic element, with a current corresponding to the reflected light during the flash, from which an electrical quantity terminating the flash is derived. The invention consists in that the circuit contains a comparator, with a voltage derived from the current supplied at one of its inputs, while the other input of the comparator is supplied with an adjustable reference voltage. Connected to the output of the comparator is a switching path which is actuated by the comparator upon signal output, thereby terminating the flash.