EP2369855A3 - Electronic device with electret electro-acoustic transducer - Google Patents

Electronic device with electret electro-acoustic transducer Download PDF

Info

Publication number
EP2369855A3
EP2369855A3 EP11162045A EP11162045A EP2369855A3 EP 2369855 A3 EP2369855 A3 EP 2369855A3 EP 11162045 A EP11162045 A EP 11162045A EP 11162045 A EP11162045 A EP 11162045A EP 2369855 A3 EP2369855 A3 EP 2369855A3
Authority
EP
European Patent Office
Prior art keywords
electronic device
acoustic transducer
conductive layer
electro
electret diaphragm
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.)
Granted
Application number
EP11162045A
Other languages
German (de)
French (fr)
Other versions
EP2369855B1 (en
EP2369855A2 (en
Inventor
Yi Tsung Cheng
Fang Ching Lee
Chih Chao Hsieh
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.)
HTC Corp
Original Assignee
HTC Corp
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 HTC Corp filed Critical HTC Corp
Publication of EP2369855A2 publication Critical patent/EP2369855A2/en
Publication of EP2369855A3 publication Critical patent/EP2369855A3/en
Application granted granted Critical
Publication of EP2369855B1 publication Critical patent/EP2369855B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/013—Electrostatic transducers characterised by the use of electrets for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Telephone Set Structure (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

An electronic device is provided. The electronic device includes a housing and an electro-acoustic transducer disposed on the inner surface of the housing. The electro-acoustic transducer includes an electret diaphragm, a conductive layer and at least one spacer. The conductive layer is formed on the inner surface of the housing. The electret diaphragm is stacked on the conductive layer and has a film body and an electrode layer. The film body has static charges and the electrode layer is formed on the film body. The spacer is positioned between the electret diaphragm and the conductive layer to keep a predetermined distance between the electret diaphragm and the conductive layer.
EP11162045.6A 2008-10-31 2009-09-02 Electronic device with electret electro-acoustic transducer Not-in-force EP2369855B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW097141921A TWI454156B (en) 2008-10-31 2008-10-31 Electronic device with electret electro-acoustic transducer
EP09169282.2A EP2182737B1 (en) 2008-10-31 2009-09-02 Electronic device with electret electro-acoustic transducer

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP09169282.2A Division-Into EP2182737B1 (en) 2008-10-31 2009-09-02 Electronic device with electret electro-acoustic transducer
EP09169282.2A Division EP2182737B1 (en) 2008-10-31 2009-09-02 Electronic device with electret electro-acoustic transducer
EP09169282.2 Division 2009-09-02

Publications (3)

Publication Number Publication Date
EP2369855A2 EP2369855A2 (en) 2011-09-28
EP2369855A3 true EP2369855A3 (en) 2012-04-04
EP2369855B1 EP2369855B1 (en) 2014-05-07

Family

ID=41137441

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11162045.6A Not-in-force EP2369855B1 (en) 2008-10-31 2009-09-02 Electronic device with electret electro-acoustic transducer
EP09169282.2A Not-in-force EP2182737B1 (en) 2008-10-31 2009-09-02 Electronic device with electret electro-acoustic transducer

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP09169282.2A Not-in-force EP2182737B1 (en) 2008-10-31 2009-09-02 Electronic device with electret electro-acoustic transducer

Country Status (3)

Country Link
EP (2) EP2369855B1 (en)
JP (1) JP5054749B2 (en)
TW (1) TWI454156B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8472650B2 (en) 2008-10-15 2013-06-25 Htc Corporation Electro-acoustic transducer
US8243965B2 (en) 2008-10-15 2012-08-14 Htc Corporation Electro-acoustic transducer
TWI439139B (en) 2010-06-17 2014-05-21 Htc Corp Capacitive electro-acoustic transduction system and capacitive electro-acoustic transducer thereof
DE102013213891A1 (en) * 2013-05-21 2014-11-27 Siemens Medical Instruments Pte. Ltd. microphone array
US11228844B2 (en) 2017-05-18 2022-01-18 The Johns Hopkins University Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935397A (en) * 1974-01-28 1976-01-27 Electronic Industries, Inc. Electrostatic loudspeaker element
WO2000027166A2 (en) * 1998-11-02 2000-05-11 Sarnoff Corporation Transducer concepts for hearing aids and other devices
WO2004062318A1 (en) * 2003-01-03 2004-07-22 W. L. Gore & Associates Gmbh Membrane for acoustic transducers
WO2006118680A1 (en) * 2005-04-28 2006-11-09 Knowles Electronics, Llc Acoustic transducer module
EP1722596A1 (en) * 2004-03-09 2006-11-15 Matsushita Electric Industrial Co., Ltd. Electret capacitor microphone

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3084229A (en) 1960-03-11 1963-04-02 Ampex Electrostatic earphone
JPS5127318A (en) * 1974-08-31 1976-03-06 Tokyo Shibaura Electric Co SEIDENGATADENKIONKYOHENKANKI
JPS536673U (en) * 1976-07-03 1978-01-20
US4160882A (en) 1978-03-13 1979-07-10 Driver Michael L Double diaphragm electrostatic transducer each diaphragm comprising two plastic sheets having different charge carrying characteristics
WO1997039464A1 (en) * 1996-04-18 1997-10-23 California Institute Of Technology Thin film electret microphone
JP3322144B2 (en) * 1996-12-20 2002-09-09 三菱電機株式会社 Electrostatic transparent speaker
WO2000070630A2 (en) * 1999-05-19 2000-11-23 California Institute Of Technology High performance mems thin-film teflon® electret microphone
JP2002345084A (en) * 2001-05-16 2002-11-29 Citizen Electronics Co Ltd Speaker
JP2003102097A (en) * 2001-09-25 2003-04-04 Nippon Hoso Kyokai <Nhk> Sound processing apparatus
JP2004166262A (en) * 2002-10-23 2004-06-10 Matsushita Electric Ind Co Ltd Electroacoustic transducer and manufacturing method thereof
US7089635B2 (en) * 2003-02-25 2006-08-15 Palo Alto Research Center, Incorporated Methods to make piezoelectric ceramic thick film arrays and elements
US7505602B2 (en) * 2003-02-28 2009-03-17 Sony Ericsson Mobile Communications Ab Mobile device with improved acoustic porting
JP3979334B2 (en) * 2003-04-21 2007-09-19 株式会社村田製作所 Piezoelectric electroacoustic transducer
JP4156649B2 (en) * 2004-04-27 2008-09-24 ホシデン株式会社 Electret condenser microphone
US7329933B2 (en) * 2004-10-29 2008-02-12 Silicon Matrix Pte. Ltd. Silicon microphone with softly constrained diaphragm
JP4822517B2 (en) * 2005-05-24 2011-11-24 パナソニック株式会社 Speaker device
JP4770605B2 (en) 2006-06-26 2011-09-14 ヤマハ株式会社 Balanced output microphone and method of manufacturing balanced output microphone
KR20080034407A (en) * 2006-10-16 2008-04-21 야마하 가부시키가이샤 Electrostatic pressure transducer and manufacturing method therefor
US8081784B2 (en) * 2007-09-04 2011-12-20 Industrial Technology Research Institute Electrostatic electroacoustic transducers
TWI330500B (en) * 2007-09-04 2010-09-11 Ind Tech Res Inst Speaker structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935397A (en) * 1974-01-28 1976-01-27 Electronic Industries, Inc. Electrostatic loudspeaker element
WO2000027166A2 (en) * 1998-11-02 2000-05-11 Sarnoff Corporation Transducer concepts for hearing aids and other devices
WO2004062318A1 (en) * 2003-01-03 2004-07-22 W. L. Gore & Associates Gmbh Membrane for acoustic transducers
EP1722596A1 (en) * 2004-03-09 2006-11-15 Matsushita Electric Industrial Co., Ltd. Electret capacitor microphone
WO2006118680A1 (en) * 2005-04-28 2006-11-09 Knowles Electronics, Llc Acoustic transducer module

Also Published As

Publication number Publication date
EP2182737B1 (en) 2014-03-05
TWI454156B (en) 2014-09-21
EP2369855B1 (en) 2014-05-07
JP5054749B2 (en) 2012-10-24
EP2182737A1 (en) 2010-05-05
JP2010109979A (en) 2010-05-13
TW201018252A (en) 2010-05-01
EP2369855A2 (en) 2011-09-28

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