Title:
CLEANING DEVICE, IMAGING UNIT EQUIPPED WITH CLEANING DEVICE, AND CLEANING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/220539
Kind Code:
A1
Abstract:
A cleaning device according to the present disclosure is provided with: an imaging unit (5); a protection cover disposed in the visual field of the imaging unit (5); a vibration unit that vibrates the protection cover; a piezoelectric driving unit (30) that drives the vibration unit; a cleaning liquid discharge unit (50) that discharges a cleaning body to the surface of the protection cover; and a signal processing circuit (20) that controls the piezoelectric driving unit (30). The signal processing circuit (20) controls the piezoelectric driving unit (30) so that the vibration of the protection cover is to be identical with a resonance frequency for a prescribed period after discharging of a cleaning liquid, and controls the piezoelectric driving unit (30) so that the vibration of the protection cover is to be stopped or the vibration of the protection cover is to be identical with a frequency other than the resonance frequency after the prescribed period.
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Inventors:
MORI TAKAAKI (JP)
Application Number:
PCT/JP2020/043177
Publication Date:
November 04, 2021
Filing Date:
November 19, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G03B17/02; B60S1/62; G03B15/00; H04N5/225
Domestic Patent References:
| WO2018198465A1 | 2018-11-01 | |||
| WO2018198464A1 | 2018-11-01 | |||
| WO2018169233A1 | 2018-09-20 |
Foreign References:
| JP2015231173A | 2015-12-21 | |||
| JP2012138768A | 2012-07-19 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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