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:
Jan. 01, 2002
Filed:
Jun. 02, 2000
Makoto Akiba, Saitama, JP;
Kazuaki Nagata, Saitama, JP;
Fuji Photo Optical Co., Ltd., Saitama, JP;
Abstract
A camera is provided with a lens barrier for covering and uncovering an opening which is formed in a front face of the camera and is for exposing a taking lens. The lens barrier protects the taking lens when the camera is not used. The lens barrier is driven by a motor. This motor is controlled by a motor control unit relative to its rotational direction (forward and backward direction), its rotational amount and its rotational speed. As the motor, a DC motor is used. Into this DC motor, drive-pulse trains having different duty factor are inputted to control the rotational speed. Owing to this, an operation speed of the lens barrier is controlled so as to be faster when the lens barrier opens the opening, and so as to be slower when the lens barrier closes the opening.