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. 17, 1990
Filed:
Sep. 20, 1988
Nobuaki Date, Kanagawa, JP;
Nobuo Tezuka, Kanagawa, JP;
Syuichiro Saito, Kanagawa, JP;
Akihiko Tojo, Kanagawa, JP;
Susumu Kozuki, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image sensing device comprises image sensing apparatus for converting an optical image into an electrical signal; shutter apparatus for blocking light incident upon the image sensing apparatus; periodic signal generating apparatus for forming periodic signals which are produced for periodically reading the electrical signal of the image sensing apparatus; a switch for giving an instruction to operate the shutter apparatus; first timer apparatus to operate in response to a predetermined periodic signal produced after the switch is operated; and shutter driving apparatus which begins to operate for opening the shutter apparatus after the lapse of a predetermined time counted by the timer apparatus. The device is capable of cancelling a delay in the operation of the shutter apparatus, etc. by the first timer apparatus. The device is provided with closure detecting apparatus to detect a shift of the shutter apparatus from an open state to a closed state; and an inhibiting apparatus to inhibit the above-stated reading by the periodic signal generating apparatus until the output of the closure detecting apparatus is obtained after commencement of a still picture image sensing process. This arrangement deletes any adverse effect of a bounce or bound of the shutter apparatus even if it takes place at the end of a shutter travel. The device is provided further with second timer apparatus which operates in response to a predetermined periodic signal obtained after the switch is operated. The shutter driving apparatus starts to open the shutter apparatus after the lapse of a predetermined length of time counted by the first timer apparatus and starts to close the shutter apparatus after the lapse of another length of time counted by the second timer apparatus, so that the shutter apparatus can be opened and closed with highly precise timing.