发明授权
US07119475B2 Driving method of piezoelectric actuator, driving apparatus of piezoelectric actuator, electronic watch, electronics, control program of piezoelectric actuator, and storage medium
有权
压电致动器的驱动方法，压电致动器的驱动装置，电子表，电子学，压电致动器的控制程序和存储介质
- 专利标题： Driving method of piezoelectric actuator, driving apparatus of piezoelectric actuator, electronic watch, electronics, control program of piezoelectric actuator, and storage medium
- 专利标题（中）： 压电致动器的驱动方法，压电致动器的驱动装置，电子表，电子学，压电致动器的控制程序和存储介质
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申请号： US10812390申请日： 2004-03-30
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公开(公告)号： US07119475B2公开(公告)日： 2006-10-10
- 发明人: Jun Matsuzaki , Takashi Kawaguchi , Makoto Okeya
- 申请人： Jun Matsuzaki , Takashi Kawaguchi , Makoto Okeya
- 申请人地址： JP Tokyo
- 专利权人： Seiko Epson Corporation
- 当前专利权人： Seiko Epson Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Global IP Counselors, LLP
- 优先权： JP2003-095606 20030331
- 主分类号： H01L41/08
- IPC分类号： H01L41/08
摘要：
A drive device for a piezoelectric actuator, wherein the time needed to achieve highly efficient drive conditions is shortened to reduce power consumption, and stabilized control can be performed. The device has a phase difference detection device (phase difference/voltage conversion circuit (51)) for detecting detection signals of longitudinal oscillation and bending oscillation from an oscillator (5) and detecting the phase difference between these two signals, frequency control devices (52 to 56) for comparing the phase difference detected by the phase difference detection device with a standard phase difference value and controlling the frequency of a drive signal sent to a piezoelectric element (17) on the basis of the results of this comparison, and an amplitude detection device (amplitude detection circuit (57)) for detecting the amplitude of the detection signal of the piezoelectric element (17). The frequency control device compares the amplitude with a standard amplitude value and controls the frequency of the drive signal on the basis of the results of this comparison.
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