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Piezo Module

A piezoelectric module, piezoelectric element technology, applied in piezoelectric/electrostrictive transducers, electrical components, fluids utilizing vibration, etc. question

Active Publication Date: 2020-01-31
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In such a piezoelectric module, the frequency band of 16 to 20 kHz is suitable for short-distance transmission, and the frequency below 16 kHz is not suitable for communication because the sound is easy to hear. In addition, the data transmission speed will slow down when the frequency is higher than 20 kHz. thus not suitable for data communication
[0008] However, in the case where the above-mentioned small piezoelectric module is used as the sound emitting part, in the frequency band of 16 to 20 kHz, some signals may not reach the receiving microphone or the like located at a predetermined distance (short distance) and become unstable. communication status

Method used

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Experimental program
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Embodiment Construction

[0017] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In addition, in the description, the same symbols are used for the same elements or elements having the same functions, and overlapping descriptions are omitted.

[0018] The piezoelectric module according to the present disclosure is a device that transmits an acoustic wave signal using air as a medium, and is used for short-distance communication of, for example, about 0.1 m to 2 m.

[0019] Such as figure 1 As shown, the piezoelectric module 1 has a structure in which the piezoelectric vibration plate 30 is attached to the oscillation member 10 via the transmission member 20 .

[0020] The oscillating part 10 is a part that emits an acoustic wave signal. figure 1 The shown oscillating member 10 has a plate-shaped portion having a uniform thickness, but the shape of the oscillating member 10 is not particularly limited as long as it can output an acoustic w...

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PUM

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Abstract

The present invention provides a piezoelectric module capable of further miniaturization. The piezoelectric module can avoid such shortening of signal transmission distance and improve communication stability by shifting the resonance point from the frequency band of the signal to be transmitted, and further miniaturization can be easily achieved because no resonance space is provided.

Description

[0001] This application is based on and claims priority from Japanese Patent Application No. 2015-156063 filed on Aug. 6, 2015, the entire contents of which are hereby incorporated by reference. technical field [0002] The invention relates to a piezoelectric module for transmitting acoustic signals. Background technique [0003] Conventionally, there has been known a communication method that uses air as a medium to transmit a signal to a terminal using an existing speaker (speaker) as a sound generating part and a microphone (mike) mounted on a terminal such as a mobile phone (Patent Document 1 [Japanese Patent No. 4295781 number] etc.). [0004] As an application of the above-mentioned communication method, transmission of program information data from a speaker of a television set or transmission of data over a distance of only a few meters from a small health care device has recently been considered. [0005] However, typical speakers considered to be used in the abov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K9/122G10K9/20H10N30/00
CPCG10K9/122G10K9/20G10K11/002B06B1/0651H04R17/00H04B11/00
Inventor 木嶋薰佐藤晃
Owner TDK CORPARATION