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:
Jun. 28, 2011
Filed:
Jun. 24, 2010
Toshiaki Yamada, Saitama, JP;
Shinichiro Sanada, Tokyo, JP;
Kosei Kosako, Tokyo, JP;
Yutaka Ohsawa, Tokyo, JP;
Hirotaka Ueno, Saitama, JP;
Toshiaki Yamada, Saitama, JP;
Shinichiro Sanada, Tokyo, JP;
Kosei Kosako, Tokyo, JP;
Yutaka Ohsawa, Tokyo, JP;
Hirotaka Ueno, Saitama, JP;
Hoya Corporation, Tokyo, JP;
Abstract
A diaphragm control apparatus in a camera body includes a stepping motor; a lead screw thereof, wherein a slider is driven by the lead screw; a position detector; and a controller. When driving the stepping motor by a predetermined number of steps in a direction to move the slider away from an origin position, the controller detects the slider position before driving the stepping motor stepwise as the origin position via the position detector, and thereafter detects a stepping position of the slider to compare the stepping position with the origin position each time the stepping motor is driven by one step, and counts the number of steps based from the moment at which the stepping position of the slider exceeds a predetermined position in the direction to move the slider away from the origin position against the biasing force of the resilient biaser.