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. 20, 1982
Filed:
Oct. 21, 1980
Koji Suzuki, Asaka, JP;
Eiichi Tano, Kamifukuoka, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A shutter speed display device for a camera in which light emitting diodes are arranged in a viewfinder of the camera with one light emitting diode corresponding to each of a plurality of shutter speed indicating numerals. The light emitting diodes are connected in a matrix format and driven in a time division manner so that one or more of the light emitting diodes can be simultaneously activated so as to display both the selected shutter speed and to indicate whether the picture would be under-exposed or over-exposed. In one embodiment, both the shutter indicating light emitting diode and the under-exposure and over-exposure diodes are switched on and off at a high rate of speed so that their light output appears to be stable to the operator. In a second embodiment, the light emitting diodes for indicating the under-exposure and over-exposure conditions are made to flicker.