Invention Grant
US07671510B2 Ultrasonic actuator, driving method of the ultrasonic actuator, lens driver, and portable device
失效
超声波致动器，超声波驱动器的驱动方法，镜头驱动器和便携式装置
- Patent Title: Ultrasonic actuator, driving method of the ultrasonic actuator, lens driver, and portable device
- Patent Title (中): 超声波致动器，超声波驱动器的驱动方法，镜头驱动器和便携式装置
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Application No.: US11637088Application Date: 2006-12-12
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Publication No.: US07671510B2Publication Date: 2010-03-02
- Inventor: Hitoshi Kawamura , Keisuke Taguchi
- Applicant: Hitoshi Kawamura , Keisuke Taguchi
- Applicant Address: JP Ibaraki-shi, Osaka
- Assignee: Hitachi Maxell, Ltd.
- Current Assignee: Hitachi Maxell, Ltd.
- Current Assignee Address: JP Ibaraki-shi, Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2005-359398 20051213; JP2006-130231 20060509; JP2006-165237 20060614
- Main IPC: H01L41/09
- IPC: H01L41/09
Abstract:
An ultrasonic actuator according to an embodiment of the present invention includes: a stator generating a rotational driving force in accordance with a driving signal having a train pulse, which is used, for example, an AF mechanism; and a rotor converting the rotational driving force into actual movement. In the thus-structured ultrasonic actuator of the present invention, the driving signal is obtained by removing a predetermined number of pulses from the pulse train upon deceleration, and the remaining number of consecutive pulses is set to at least 2 or 4 or more.
Public/Granted literature
- US20070133968A1 Ultrasonic actuator, driving method of the ultrasonic actuator, lens driver, and portable device Public/Granted day:2007-06-14
Information query
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