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:
Jul. 26, 1983
Filed:
Oct. 07, 1981
Masanori Uchidoi, Kanagawa, JP;
Kazunobu Urushihara, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to a shutter time control circuit for a camera having a focal plane shutter and a timer circuit for counting the shutter time in a digital way. In accordance with the present invention a preset means for presetting the amount of the overlapping of the shutter curtain and/or the response delay of the magnet on the timer circuit as digital values is provided in such a manner that the clock time is compensated in accordance with the preset digital value so as to compensate the exposure error due to the overlapping amount of the shutter curtains and so on, which makes it possible to offer a digital exposure compensation device suited for the camera having a shutter control circuit for digitally controlling the shutter time.