发明授权
US07564166B2 Driving apparatus, lens driving apparatus and image pickup apparatus
失效
驱动装置,透镜驱动装置和图像拾取装置
- 专利标题: Driving apparatus, lens driving apparatus and image pickup apparatus
- 专利标题(中): 驱动装置,透镜驱动装置和图像拾取装置
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申请号: US12045544申请日: 2008-03-10
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公开(公告)号: US07564166B2公开(公告)日: 2009-07-21
- 发明人: Haruo Onozuka , Takeshi Ichimiya , Motoyoshi Tokumiya
- 申请人: Haruo Onozuka , Takeshi Ichimiya , Motoyoshi Tokumiya
- 申请人地址: JP Saitama-shi
- 专利权人: Fujinon Corporation
- 当前专利权人: Fujinon Corporation
- 当前专利权人地址: JP Saitama-shi
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2007-089400 20070329
- 主分类号: H01L41/08
- IPC分类号: H01L41/08
摘要:
A driving apparatus comprises an actuator, the actuator comprising an electromechanical conversion element and a driving shaft attached to the electromechanical conversion element, wherein the driving apparatus expands and contracts the electromechanical conversion element by applying a driving signal to the electromechanical conversion element and reciprocally moves the driving shaft in accordance with expansion and contraction movement of the electromechanical conversion element so as to move a driven member frictionally engaged with the driving shaft, and wherein the driving signal is a pulse signal, and half of a time period corresponding to a reciprocal of a lowest resonance frequency in the actuator is set as a shorter output time among a high output time period and a low output time period of the drive signal.