Invention Grant
- Patent Title: Drive unit
- Patent Title (中): 驱动单元
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Application No.: US12114861Application Date: 2008-05-05
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Publication No.: US07960895B2Publication Date: 2011-06-14
- Inventor: Yusuke Adachi , Hideaki Mukae , Masaru Higashionji , Eiichi Nagaoka , Kenichi Honjo
- Applicant: Yusuke Adachi , Hideaki Mukae , Masaru Higashionji , Eiichi Nagaoka , Kenichi Honjo
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- Priority: JP2007-122284 20070507
- Main IPC: H01L41/08
- IPC: H01L41/08

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°.
Public/Granted literature
- US20080278032A1 DRIVE UNIT Public/Granted day:2008-11-13
Information query
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