Invention Grant
US07960898B2 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
- Patent Title: Driving apparatus, lens driving apparatus and image pickup apparatus
- Patent Title (中): 驱动装置,透镜驱动装置和图像拾取装置
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Application No.: US12046332Application Date: 2008-03-11
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Publication No.: US07960898B2Publication Date: 2011-06-14
- Inventor: Haruo Onozuka
- Applicant: Haruo Onozuka
- Applicant Address: JP Saitama-Shi
- Assignee: Fujinon Corporation
- Current Assignee: Fujinon Corporation
- Current Assignee Address: JP Saitama-Shi
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JPP2007-085229 20070328
- Main IPC: H02N2/04
- IPC: H02N2/04 ; H02N2/06

Abstract:
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 a time period corresponding to a half wavelength of a damping vibration displacement 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 driving signal.
Public/Granted literature
- US20080238251A1 DRIVING APPARATUS, LENS DRIVING APPARATUS AND IMAGE PICKUP APPARATUS Public/Granted day:2008-10-02
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