Title:
BUZZER OUTPUT CONTROL DEVICE AND BUZZER OUTPUT CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2014/103104
Kind Code:
A1
Abstract:
By the present invention, a buzzer is sounded without contamination with abnormal noise. A non-audible-frequency signal generation unit (22) generates a non-audible-frequency pulse signal (P0) having a non-audible frequency, an audible-frequency signal generation unit (26) generates an audible-frequency pulse signal (P1) having an audible frequency from the non-audible-frequency pulse signal (P0), a signal synthesis unit (28) generates a synthesized-frequency pulse signal (P2) in which the non-audible-frequency pulse signal (P0) is synthesized during the ON time of the audible-frequency pulse signal (P1), a first duty ratio setting unit (30) sets the duty ratio (Di) of the non-audible-frequency pulse signal (P0) synthesized in the synthesized-frequency pulse signal (P2) so as to gradually increase over the course of an initial predetermined period of the synthesized-frequency pulse signal (P2) and generates a buzzer driving signal (P3), and a buzzer driving unit (40) sounds a buzzer (60) at a volume corresponding to the duty ratio of the buzzer driving signal (P3) and the pitch of a sound corresponding to the frequency of the buzzer driving signal (P3).
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Inventors:
NAGASHIMA NORIHIRO (JP)
SAWADA SOU (JP)
SAWADA SOU (JP)
Application Number:
PCT/JP2013/005483
Publication Date:
July 03, 2014
Filing Date:
September 17, 2013
Export Citation:
Assignee:
CALSONIC KANSEI CORP (JP)
International Classes:
B60Q5/00
Foreign References:
| JP2012171462A | 2012-09-10 | |||
| JPH10214090A | 1998-08-11 | |||
| JP2003058164A | 2003-02-28 | |||
| JP2009260544A | 2009-11-05 |
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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