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CN101662718A - 薄膜扬声器 - Google Patents

薄膜扬声器 Download PDF

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Publication number
CN101662718A
CN101662718A CN200810304278A CN200810304278A CN101662718A CN 101662718 A CN101662718 A CN 101662718A CN 200810304278 A CN200810304278 A CN 200810304278A CN 200810304278 A CN200810304278 A CN 200810304278A CN 101662718 A CN101662718 A CN 101662718A
Authority
CN
China
Prior art keywords
piezoelectric membrane
wafer speaker
conductive layer
cavity
speaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN200810304278A
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English (en)
Inventor
邹志刚
胡国梁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Futaihong Precision Industry Co Ltd
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Shenzhen Futaihong Precision Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Futaihong Precision Industry Co Ltd filed Critical Shenzhen Futaihong Precision Industry Co Ltd
Priority to CN200810304278A priority Critical patent/CN101662718A/zh
Priority to US12/342,922 priority patent/US20100054505A1/en
Publication of CN101662718A publication Critical patent/CN101662718A/zh
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

本发明提供一种薄膜扬声器，包括连接端子、压电薄膜及导电层，该导电层涂覆在该压电薄膜的表面上，该连接端子电连接于该导电层上，该压电薄膜形成有一空腔。

Description

薄膜扬声器
技术领域
本发明涉及一种扬声器，尤其是涉及一种薄膜扬声器。
背景技术
传统的扬声器是锥形扬声器，该锥形扬声器包括一个含有震动片的锥体和一个共鸣室。然而此种锥形扬声器存在体积大及重量大的问题。如此，薄膜扬声器应运而生。
现有的薄膜扬声器具有一压电薄膜。该压电薄膜具有压电性，即在通电的情况下会震动而发声。薄膜扬声器由于结构比较简单，成本较低而被广泛应用。
然而，所述薄膜扬声器装配于其它电子产品上时，需于该电子产品上预留一震动空间以便该压电薄膜震动发声。如此一来，则大大限制了薄膜扬声器的应用范围。
发明内容
有鉴于此，有必要提供一种自带震动空间的薄膜扬声器。
一种薄膜扬声器，包括连接端子、压电薄膜及导电层，该导电层涂覆在该压电薄膜的表面上，该连接端子电连接于该导电层上，该压电薄膜形成有一空腔。
与现有技术相比，所述薄膜扬声器由于其自身具有空腔作为震动空间，使得薄膜扬声器装配于其它电子产品上时，不需于该电子产品上预留一震动空间。
附图说明
图1是本发明薄膜扬声器较佳实施方式的立体分解示意图。
具体实施方式
请参阅图1所示的本发明薄膜扬声器较佳实施方式，该薄膜扬声器10包括二连接端子11、二压电薄膜12及一导电层13。
所述连接端子11一端电连接于该压电薄膜12，另一端电连接于驱动该薄膜扬声器10的外置设备(图未示)。
所述压电薄膜12是对一聚偏氟乙烯等树脂薄膜经过等离子表面处理而制成。该压电薄膜12具有压电性。该二压电薄膜12的边缘粘接在一起，其中部形成一空腔121。该空腔121用于提供压电薄膜12的震动空间，而且每一压电薄膜12直接产生的声音与另一压电薄膜12反射的声音进行有时差的干涉，从而产生了共鸣现象，进一步提高压电薄膜12的发声响度。
所述导电层13可以为金属或其它导电材质，其均匀涂覆在压电薄膜12的表面上，以便该连接端子11电连接于该压电薄膜12。
可以理解，该空腔121也可以由一压电薄膜12的周缘粘连在一起而围成。
所述薄膜扬声器10由于其自身具有空腔121作为震动空间，使得薄膜扬声器10装配于其它电子产品上时，不需于该电子产品上预留一震动空间，另外，该空腔121进一步提高压电薄膜12的发声响度。

Claims (4)

1.一种薄膜扬声器，包括连接端子、压电薄膜及导电层，该导电层涂覆在该压电薄膜的表面上，该连接端子电连接于该导电层上，其特征在于：该压电薄膜形成有一空腔。
2.如权利要求1所述的薄膜扬声器，其特征在于：所述压电薄膜的数量为两个，该二压电薄膜的边缘粘接在一起而围成该空腔。
3.如权利要求1所述的薄膜扬声器，其特征在于：所述压电薄膜的数量为一个，该压电薄膜的周缘粘连在一起而围成该空腔。
4.如权利要求1所述的薄膜扬声器，其特征在于：所述压电薄膜是对一聚偏氟乙烯经过等离子表面处理而制成。
CN200810304278A 2008-08-28 2008-08-28 薄膜扬声器 Pending CN101662718A (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200810304278A CN101662718A (zh) 2008-08-28 2008-08-28 薄膜扬声器
US12/342,922 US20100054505A1 (en) 2008-08-28 2008-12-23 Film speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200810304278A CN101662718A (zh) 2008-08-28 2008-08-28 薄膜扬声器

Publications (1)

Publication Number Publication Date
CN101662718A true CN101662718A (zh) 2010-03-03

Family

ID=41725495

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200810304278A Pending CN101662718A (zh) 2008-08-28 2008-08-28 薄膜扬声器

Country Status (2)

Country Link
US (1) US20100054505A1 (zh)
CN (1) CN101662718A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103535053A (zh) * 2011-05-17 2014-01-22 株式会社村田制作所 平面型扬声器以及av设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7394873B2 (ja) * 2019-12-18 2023-12-08 富士フイルム株式会社 圧電フィルム

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US5212736A (en) * 1990-08-08 1993-05-18 Pioneer Electronic Corporation Ribbon speaker
CA2396260C (en) * 2000-01-07 2007-09-11 Lewis Athanas Mechanical-to-acoustical transformer and multi-media flat film speaker
JP4363801B2 (ja) * 2000-08-29 2009-11-11 富士彦 小林 圧電スピーカ
US20020196952A1 (en) * 2001-06-25 2002-12-26 Merry Electronics Co., Ltd. Piezoelectric transceiver
US7039206B2 (en) * 2001-06-28 2006-05-02 Nokia Corporation Dual diaphragm speaker
JP4034688B2 (ja) * 2002-08-28 2008-01-16 富士彦 小林 圧電スピーカ
FR2857785B1 (fr) * 2003-07-17 2005-10-21 Commissariat Energie Atomique Resonateur acoustique de volume a frequence de resonance ajustee et procede de realisation
CA2537897C (en) * 2003-08-01 2014-06-10 Cidra Corporation Method and apparatus for measuring a parameter of a high temperature fluid flowing within a pipe using an array of piezoelectric based flow sensors
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JP2009188801A (ja) * 2008-02-07 2009-08-20 Panasonic Corp 圧電スピーカ
CN101895807B (zh) * 2009-05-19 2012-11-21 清华大学 平板扬声器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103535053A (zh) * 2011-05-17 2014-01-22 株式会社村田制作所 平面型扬声器以及av设备
US9332353B2 (en) 2011-05-17 2016-05-03 Murata Manufacturing Co., Ltd. Plane-type speaker and AV apparatus
US9363607B2 (en) 2011-05-17 2016-06-07 Murata Manufacturing Co., Ltd. Plane-type speaker and AV apparatus
CN103535053B (zh) * 2011-05-17 2017-03-29 株式会社村田制作所 平面型扬声器以及av设备

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Open date: 20100303