Title:
IMAGING DEVICE, METHOD FOR DRIVING IMAGING DEVICE AND DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/121772
Kind Code:
A1
Abstract:
The present invention improves the stability of drive properties by correcting in a manner such that operation amount and movable body movement speed satisfy a linear relationship. The movable body is moved by expanding and contracting a piezoelectric element by using a square-wave drive signal. The square-wave drive signal is generated on the basis of the operation amount. Non-linearity in the correlation between the operation amount and the movable body movement speed is linearized and corrected by adjusting the duty ratio or frequency of the square-wave drive signal. For example, the non-linearity is a non-linearity associated with a peak value control of the square-wave drive signal. In addition, for example, the non-linearity is a non-linearity associated with a non-linearity of the piezoelectric element.
Inventors:
OYAMA TOMOYUKI (JP)
Application Number:
PCT/JP2019/045612
Publication Date:
June 18, 2020
Filing Date:
November 21, 2019
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
G02B7/08; G02B7/28; G03B13/36; H02N2/06
Foreign References:
| JP2017143602A | 2017-08-17 | |||
| JPH0888985A | 1996-04-02 | |||
| JP2008067441A | 2008-03-21 | |||
| JP2010206857A | 2010-09-16 | |||
| US7545076B1 | 2009-06-09 | |||
| JP2007140417A | 2007-06-07 | |||
| US20080252957A1 | 2008-10-16 | |||
| JP2017070098A | 2017-04-06 | |||
| JP2000245176A | 2000-09-08 | |||
| JP2018061418A | 2018-04-12 |
Attorney, Agent or Firm:
MIYATA, Masaaki et al. (JP)
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