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:
May. 23, 1978
Filed:
Jul. 25, 1977
Minolta Camera Kabushiki Kaisha, Osaka, JA;
Abstract
Camera exposure control circuitry for automatically controlling exposure time or the diaphragm aperture in accordance with scene brightness, is provided with an indicating device for indicating exposure conditions to be determined by the control circuitry. In response to a rectangular wave signal produced by a photoflash device upon completion of charging of the main capacitor thereof, the control circuitry is set to provide a proper exposure condition suitable for flash photography. The indicating device intermittently energizes one of a plurality of indicator elements that indicates the proper exposure condition, in response to upper level portions of the rectangular wave signal. An exposure control magnet is controlled by two parallelly connected transistors, one being responsive to the output of the control circuitry and the other being responsive to the signal from the photoflash device.