- 专利标题： Control device and method for controlling a piezoelectric drive device using phase difference
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申请号： US16145331申请日： 2018-09-28
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公开(公告)号： US11411512B2公开(公告)日： 2022-08-09
- 发明人: Kiichi Kajino
- 申请人： Seiko Epson Corporation
- 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： Harness, Dickey & Pierce, P.L.C.
- 优先权： JPJP2017-191088 20170929
- 主分类号： H02N2/14
- IPC分类号： H02N2/14 ; H02N2/10 ; H01L41/04 ; H01L41/08 ; G02B7/04 ; B41J2/045 ; H01L21/677 ; G03B21/53 ; G03B21/14 ; G03B21/20 ; G03B21/00
摘要：
A control device of a piezoelectric drive device includes a drive pulse signal generation unit that generates a binary drive pulse signal, a drive signal generation unit that generates a drive signal which is applied to the piezoelectric element for drive from the drive pulse signal, a detection pulse signal generation unit that generates a detection pulse signal by binarizing the detection signal which is output from the piezoelectric element for detection, and a phase difference acquisition unit that acquires a phase difference between the drive pulse signal and the detection pulse signal, based on a rising edge and a falling edge of the drive pulse signal and a rising edge and a falling edge of the detection pulse signal.
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