发明授权
- 专利标题: Vibration-type driving device, control apparatus for controlling the driving of the vibration-type driving device, and electronic equipment having the vibration-type driving device and the control apparatus
- 专利标题(中): 振动式驱动装置,用于控制振动型驱动装置的驱动的控制装置以及具有振动型驱动装置和控制装置的电子设备
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申请号: US10804343申请日: 2004-03-19
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公开(公告)号: US07187104B2公开(公告)日: 2007-03-06
- 发明人: Shinji Yamamoto , Nobuyuki Kojima
- 申请人: Shinji Yamamoto , Nobuyuki Kojima
- 申请人地址: JP Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JP Tokyo
- 代理机构: Canon U.S.A. IP Div
- 优先权: JP2003-092783 20030328; JP2003-108325 20030411
- 主分类号: H02N2/00
- IPC分类号: H02N2/00 ; H01L41/04
摘要:
A vibration-type driving device comprises a vibration element including a driving member and an electro-mechanical energy conversion element having an electrode and arranged to displace the driving member with a driving signal supplied to the electrode, and a driven element that is kept in contact with the driving member of the vibration element. According to the driving signal supplied to the electrode of the electro-mechanical energy conversion element, the vibration element excites vibrations in two flexural vibration modes in which a direction of generation of a node in one mode is perpendicular to that in the other mode. With the use of the two flexural vibration modes, the natural vibration frequency of the vibration element can be prevented from increasing, and the position of a node occurring in one flexural vibration mode and the position of an antinode occurring in the other flexural vibration mode can be made to coincide with each other, so that the amount of displacement of the driving member can be made large.
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