Invention Grant
- Patent Title: Driving circuit for vibration-type actuator
- Patent Title (中): 振动式执行器驱动电路
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Application No.: US12905993Application Date: 2010-10-15
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Publication No.: US08552619B2Publication Date: 2013-10-08
- Inventor: Jun Sumioka , Kenichi Kataoka
- Applicant: Jun Sumioka , Kenichi Kataoka
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon USA, Inc., IP Division
- Priority: JP2009-265234 20091120
- Main IPC: H01L41/09
- IPC: H01L41/09

Abstract:
A driving circuit is configured to drive a vibration-type actuator including a vibration member and a moving member. The vibration member includes an electro-mechanical energy conversion element and may generate a vibration wave in response to an alternating voltage applied to the electro-mechanical energy conversion element. The moving member is in contact with the vibration member and may move in response to the vibration wave relative to the vibration member. The driving circuit includes a capacitor and an inductor connected in series with the capacitor to the electro-mechanical energy conversion element. Parameters of the driving circuit may be set such that when a series resonance frequency of the inductor and the capacitor is denoted by fs and a resonance frequency of the vibration member is denoted by fm, a condition 0.73·fm
Public/Granted literature
- US20110121686A1 DRIVING CIRCUIT FOR VIBRATION-TYPE ACTUATOR Public/Granted day:2011-05-26
Information query
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