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. 20, 2010
Filed:
Oct. 25, 2005
Kozo Ishida, Tokyo, JP;
Atsushi Michimori, Tokyo, JP;
Noriyuki Komori, Tokyo, JP;
Hideki Kunishio, Tokyo, JP;
Hiroaki Sugiura, Tokyo, JP;
Takashi Itow, Tokyo, JP;
Tetsuya Kuno, Tokyo, JP;
Kozo Ishida, Tokyo, JP;
Atsushi Michimori, Tokyo, JP;
Noriyuki Komori, Tokyo, JP;
Hideki Kunishio, Tokyo, JP;
Hiroaki Sugiura, Tokyo, JP;
Takashi Itow, Tokyo, JP;
Tetsuya Kuno, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
The present invention provides a control device capable of improving hysteresis characteristics of a voice coil motor () and attaining a suitable lens position without complicating the structure of the control device. As solving means of the invention, a voice coil motor control device () includes a driving current control part () that controls a driving current supplied to the voice coil motor () in accordance with a driving pulse subjected to pulse width modulation, and a driving pulse control part () that divides a drive period of the voice coil motor () into a movement period and a holding period, and controls the driving pulse by changing the duty ratio of the driving pulse during the movement period in accordance with a duty setting value and fixing the duty ratio of the driving pulse during the holding period to the duty setting value.