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:
May. 09, 2017
Filed:
May. 29, 2014
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventor:
Kazuhiro Matsumoto, Kyoto, JP;
Assignee:
ROHM CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 5/00 (2006.01); G02B 7/08 (2006.01); G02B 27/64 (2006.01); G03B 3/10 (2006.01);
U.S. Cl.
CPC ...
G03B 5/00 (2013.01); G02B 7/08 (2013.01); G02B 27/646 (2013.01); G03B 3/10 (2013.01);
Abstract
Vibration is suppressed in a feedback type VCM actuator. A converting unit converts a position command value into an internal command value varied based on a waveform having a period which is half of a period of a trigonometric function, the position command value being indicative of a position of a mover and changeable step by step. A driving unit receives a position detection value indicating a current position of the mover from a sensor and drives a voice coil motor such that the position detection value matches the internal command value.