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. 12, 1988
Filed:
Aug. 13, 1987
Kazuhiko Naruse, Nabari, JP;
Naoya Takata, Osaka, JP;
Yoshihiko Azuma, Kyoto, JP;
Takehiro Katoh, Sakai, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A photometer comprising a measurement button and a FIX key; a photoelectric conversion circuit which is actuated by the measurement button so as to start a measurement; a random-access memory which holds a measured light value, obtained through the measurement by the photoelectric conversion circuit, when the FIX key is operated; an accumulator which calculates deviation of a measured light value obtained through the measurement effected by the photoelectric conversion circuit from the measured light value held by the random-access memory; and a display element by which; (a) when the random-access memory is not holding a measured light value, a measured light value obtained through the measurement effected by the photoelectric conversion circuit is displayed, (b) when the random-access memory is holding a measured light value and the measurement button is out of operation, the measured light value being held is displayed, and (c) when the random-access memory is holding a measured light value and the measurement button is operated, the deviation obtained by the accumulator is displayed instead of the measured light values while the measurement button is in operation.