Title:
BUZZER SOUNDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/157487
Kind Code:
A1
Abstract:
The present invention is characterized by comprising: a buzzer 40 that is formed by using a piezoelectric element; a buzzer sounding circuit 30 having a first switch circuit 31 and a second switch circuit 32 connected to the buzzer 40; a power supply circuit 10 that supplies, to a common terminal connected to the buzzer sounding circuit 30, a voltage of a first voltage value V1 during normal driving, and a voltage of a second voltage value V2 smaller than the first voltage value V1 during standby; and a control circuit 20 for causing the first switch circuit 31 and the second switch circuit 32, during normal driving, to alternately apply, to the buzzer 40, a positive voltage signal of the first voltage value V1 and a voltage signal of 0 V which is a positive/negative reference value, and during standby, to alternately apply, to the buzzer 40, one of either a positive or a negative voltage signal of the second voltage value V2 and the other of a positive or a negative voltage signal of a third voltage value V3 smaller than the first voltage value V1.
Inventors:
AOSHIMA TAKUMA (JP)
Application Number:
PCT/JP2015/060399
Publication Date:
October 06, 2016
Filing Date:
April 01, 2015
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G10K9/122
Foreign References:
| JP2012037850A | 2012-02-23 | |||
| JPH07253786A | 1995-10-03 | |||
| JPH07219553A | 1995-08-18 | |||
| JP2008233393A | 2008-10-02 |
Attorney, Agent or Firm:
TAKAMURA, JUN (JP)
Jun Takamura (JP)
Jun Takamura (JP)
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