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. 14, 2011
Filed:
May. 05, 2008
Yusuke Adachi, Osaka, JP;
Hideaki Mukae, Hyogo, JP;
Masaru Higashionji, Osaka, JP;
Eiichi Nagaoka, Hyogo, JP;
Kenichi Honjo, Osaka, JP;
Yusuke Adachi, Osaka, JP;
Hideaki Mukae, Hyogo, JP;
Masaru Higashionji, Osaka, JP;
Eiichi Nagaoka, Hyogo, JP;
Kenichi Honjo, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A vibratory actuator includes a piezoelectric element, a driver element provided on the piezoelectric element and a movable body supported by the driver element. A control unit supplies a first voltage and a second voltage at the same frequency to the piezoelectric element. By supplying the first voltage and the second voltage having a difference phase from a phase of the first voltage by 90°, the piezoelectric element is lead to composite vibration of stretching and bending, thereby causing the driver to make an elliptical motion by the vibration and move the movable body. The control unit switches, during a fine mode, a phase difference between the first voltage and the second voltage between 90° and 0°.