发明授权
- 专利标题： Piezoelectric actuator, ultrasonic motor equipped with piezoelectric actuator, and electronic apparatus equipped with piezoelectric actuator
- 专利标题（中）： 压电执行器，配有压电执行器的超声波电机和配有压电执行器的电子设备
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申请号： US09398639申请日： 1999-09-17
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公开(公告)号： US06720711B2公开(公告)日： 2004-04-13
- 发明人: Akihiro Iino , Masao Kasuga
- 申请人： Akihiro Iino , Masao Kasuga
- 优先权： JP10-265372 19980918; JP11-259853 19990914
- 主分类号： H01L4108
- IPC分类号： H01L4108
摘要：
A piezoelectric actuator comprises a plurality of piezoelectric elements stacked in a thickness direction thereof for undergoing expansion/contraction movement to vibrationally drive the piezoelectric actuator in accordance with a driving signal applied to the piezoelectric elements. Each of the piezoelectric elements has a length extending in a direction generally perpendicular to the stacking direction. The length of each of at least two of the piezoelectric elements being different from the length of at least one other of the piezoelectric elements.
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