CA2392552A1 - Electromechanic film and acoustic element - Google Patents

Electromechanic film and acoustic element Download PDF

Info

Publication number
CA2392552A1
CA2392552A1 CA002392552A CA2392552A CA2392552A1 CA 2392552 A1 CA2392552 A1 CA 2392552A1 CA 002392552 A CA002392552 A CA 002392552A CA 2392552 A CA2392552 A CA 2392552A CA 2392552 A1 CA2392552 A1 CA 2392552A1
Authority
CA
Canada
Prior art keywords
film
cells
acoustic element
way
film according
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
CA002392552A
Other languages
French (fr)
Other versions
CA2392552C (en
Inventor
Kari Kirjavainen
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.)
Natural Colour Kari Kirjavainen Oy
Original Assignee
Natural Colour Kari Kirjavainen Oy
Kari Kirjavainen
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 Natural Colour Kari Kirjavainen Oy, Kari Kirjavainen filed Critical Natural Colour Kari Kirjavainen Oy
Publication of CA2392552A1 publication Critical patent/CA2392552A1/en
Application granted granted Critical
Publication of CA2392552C publication Critical patent/CA2392552C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S310/00—Electrical generator or motor structure
    • Y10S310/80—Piezoelectric polymers, e.g. PVDF

Abstract

An electromechanic film intended for transforming electric energy into mechanical energy and transforming mechanical energy into electric energy. T he film (1) is dielectric and formed of cells (3), the ratio of the height and width of which cells is between 3:1 and 1:3. By joining two such films together and controlling them in such a way that in the first film (1) the electric field strength decreases and in the second film (1) the electric field strength increases, a bending acoustic element is provided.

Claims (10)

1. An electromechanic film, which film (1) is dielectric and intended for transforming electric energy into mechanical energy and/or transforming mechanical energy into electric energy in such a way that a voltage or a charge is conducted onto the surfaces of the film (1), and/or a voltage or a charge is discharged from the surfaces of the film, characterized in that the film (1) is formed of cells (3), the ratio of the height and width of which cells is between 3:1 and 1:3, whereby, when a cell (3) deforms, the pressure resisting the deformation inside the cell (3) remains essentially unchanged.
2. A film according to claim 1, characterized in that the cells (3) are polygonal.
3. A film according to claim 1 or 2, characterized in that the walls (2) of the cells (3) are so thin that the air volume of the film (1) is more than 70%.
4. A film according to any one of the preceding claims, characterized in that the cells (3) are elongated in such a way that the ratio of the height and length of the cells (3) is less than 1:3.
5. A film according to claim 4, characterized in that the ratio of the height and length of the cells (3) is less than 1:10.
6. A film according to any one of the preceding claims, characterized in that the film (1 ) is at least on one side coated with an electricity-conducting layer.
7. A film according to claim 6, characterized in that the electricity-conducting layer is formed by metallizing the film (1) using vacuum evaporation.
8. A film according to any one of the preceding claims, characterized in that the film (1) is at least in some parts charged as an electret film in such a way that the upper surface of the inside of the cells (3) is positively charged and the tower surface of the inside of the cells (3) is negatively charged.
9. An acoustic element comprising at least two electromechanic films joined to each other, characterized in that the film (1) is formed of cells (3), the ratio of the height and width of which cells is between 3:1 and 1:3, and that the acoustic element comprises means for controlling the films (1) in such a way that in the first film (1) the electric field strength decreases and in the second film (1) the electric field strength increases, whereby the joined films (1) in the acoustic element bend.
10. An acoustic element according to claim 9, characterized in that folds are formed in the joined films (1) in such a way that when producing sound, the joined films (1) are arranged to move away from the hearer to compensate for the recoil force of the acoustic element.
CA2392552A 1999-11-25 2000-11-24 Electromechanic film and acoustic element Expired - Fee Related CA2392552C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI19992514 1999-11-25
FI992514A FI108204B (en) 1999-11-25 1999-11-25 A film for converting energies
PCT/FI2000/001027 WO2001039544A1 (en) 1999-11-25 2000-11-24 Electromechanic film and acoustic element

Publications (2)

Publication Number Publication Date
CA2392552A1 true CA2392552A1 (en) 2001-05-31
CA2392552C CA2392552C (en) 2010-01-26

Family

ID=8555639

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2392552A Expired - Fee Related CA2392552C (en) 1999-11-25 2000-11-24 Electromechanic film and acoustic element

Country Status (10)

Country Link
US (1) US6759769B2 (en)
EP (1) EP1232669B1 (en)
JP (1) JP2003515919A (en)
AT (1) ATE422140T1 (en)
AU (1) AU1866401A (en)
CA (1) CA2392552C (en)
DE (1) DE60041500D1 (en)
FI (1) FI108204B (en)
NO (1) NO20022473L (en)
WO (1) WO2001039544A1 (en)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7400080B2 (en) * 2002-09-20 2008-07-15 Danfoss A/S Elastomer actuator and a method of making an actuator
US7518284B2 (en) * 2000-11-02 2009-04-14 Danfoss A/S Dielectric composite and a method of manufacturing a dielectric composite
US7548015B2 (en) * 2000-11-02 2009-06-16 Danfoss A/S Multilayer composite and a method of making such
US8181338B2 (en) * 2000-11-02 2012-05-22 Danfoss A/S Method of making a multilayer composite
AU2002339115B2 (en) 2001-05-18 2007-03-15 Dupont Nutrition Biosciences Aps Method of preparing a dough with an enzyme
ES2299614T3 (en) * 2001-12-21 2008-06-01 Danfoss A/S STRUCTURE OF DIELECTRIC DEVICE FOR DRIVING OR DETECTION AND METHOD FOR MANUFACTURING THE SAME.
FI118622B (en) * 2002-01-17 2008-01-15 Band Oy B Musical instrument converter and method of making it
CN102021205A (en) 2003-01-17 2011-04-20 丹尼斯科公司 Method of producing a protein ester and a protein subunit ester
ATE398988T1 (en) 2003-02-24 2008-07-15 Danfoss As ELECTROACTIVE ELASTIC COMPRESSION BANDAGE
DE10393385T5 (en) 2003-06-13 2005-08-25 Fuji Electric Holdings Co., Ltd., Kawasaki Organic EL device and organic EL panel
EP2267108A1 (en) 2004-07-16 2010-12-29 Danisco A/S Enzymatic oil-degumming method
US7732999B2 (en) * 2006-11-03 2010-06-08 Danfoss A/S Direct acting capacitive transducer
US7880371B2 (en) * 2006-11-03 2011-02-01 Danfoss A/S Dielectric composite and a method of manufacturing a dielectric composite
FI20070155A0 (en) * 2007-02-23 2007-02-23 Panphonics Oy Elektreettilevyrakenne
JP2008213547A (en) * 2007-02-28 2008-09-18 Nissan Motor Co Ltd Noise control unit
BRPI0821253A2 (en) 2007-12-21 2015-06-16 Danisco Degumming method, method of treatment of a gum phase and use of lipid acyltransferase in water degumming of an edible oil
TWI405472B (en) 2008-07-31 2013-08-11 Htc Corp Electronic device and electro-acoustic transducer thereof
WO2010066347A2 (en) * 2008-12-13 2010-06-17 Bayer Materialscience Ag Ferroelectret multilayer composite and method for producing a ferroelectret multilayer composite with parallel tubular channels
CA2761767A1 (en) 2009-05-19 2010-11-25 Danisco A/S Use of amylase and lipolytic enzyme in bread
GB0920089D0 (en) 2009-11-17 2009-12-30 Danisco Method
WO2011114251A1 (en) 2010-03-18 2011-09-22 Danisco A/S Foodstuff
US8550823B2 (en) * 2011-01-24 2013-10-08 Single Buoy Moorings, Inc. Rigid to elastic electrode connection
BR112013025811A2 (en) 2011-04-08 2016-11-29 Danisco Us Inc "composition and method for removing a lipid based stain from a surface"
CN103535053B (en) 2011-05-17 2017-03-29 株式会社村田制作所 Plane-type loudspeaker and AV equipment
US8764685B2 (en) * 2011-06-14 2014-07-01 Abatis Medical Technologies Limited Biomedical interface pressure transducer for medical tourniquets
US8891222B2 (en) 2012-02-14 2014-11-18 Danfoss A/S Capacitive transducer and a method for manufacturing a transducer
US8692442B2 (en) 2012-02-14 2014-04-08 Danfoss Polypower A/S Polymer transducer and a connector for a transducer
EP2909230B1 (en) 2012-10-19 2019-05-22 Danisco US Inc. Stabilization of biomimetic membranes
WO2015053247A1 (en) * 2013-10-08 2015-04-16 株式会社村田製作所 Tactile sense presenting device
WO2015094527A1 (en) 2013-12-19 2015-06-25 Danisco Us Inc. Use of hydrophobins to increase gas transferin aerobic fermentation processes
JP6318970B2 (en) * 2014-08-18 2018-05-09 株式会社村田製作所 Vibrating body and tactile presentation device
US10718323B2 (en) * 2017-05-26 2020-07-21 Nuovo Pignone Tecnologie Srl Synthetic jet pump and an associated method thereof
US11039579B2 (en) 2017-12-12 2021-06-22 3M Innovative Properties Company Electrically switchable shutter

Family Cites Families (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975307A (en) * 1958-01-02 1961-03-14 Ibm Capacitive prime mover
US3632443A (en) * 1968-04-27 1972-01-04 Sony Corp Method of making polypropylene electrets
JPS4829420A (en) * 1971-08-20 1973-04-19
US3788133A (en) * 1972-08-25 1974-01-29 Toroid Corp Force sensing transducer
US4056742A (en) * 1976-04-30 1977-11-01 Tibbetts Industries, Inc. Transducer having piezoelectric film arranged with alternating curvatures
GB1593271A (en) * 1976-09-21 1981-07-15 Standard Telephones Cables Ltd Electro-acoustic transducers
FR2397120A1 (en) * 1977-07-04 1979-02-02 Lewiner Jacques IMPROVEMENTS IN ELECTROMECHANICAL TRANSDUCERS
JPS55173691U (en) * 1979-05-31 1980-12-12
JPS5647199A (en) * 1979-09-26 1981-04-28 Toray Ind Inc Polymer piezoelectric transducer of multilayered lamination type
FR2472901A1 (en) * 1979-12-28 1981-07-03 Thomson Csf BIMORPHIC TRANSDUCER IN POLYMER MATERIAL
FR2475804A1 (en) * 1980-02-12 1981-08-14 Lewiner Jacques IMPROVEMENTS ON COMPOSITE SHEETS CONSTITUTING ELECTROMECHANICAL TRANSDUCERS AND TRANSDUCERS EQUIPPED WITH SUCH SHEETS
FR2477822A1 (en) * 1980-03-04 1981-09-11 Thomson Csf ACTIVE SUSPENSION ELECTROMECHANICAL TRANSDUCER AND METHOD FOR MANUFACTURING THE SAME
US4472604A (en) * 1980-03-08 1984-09-18 Nippon Gakki Seizo Kabushiki Kaisha Planar type electro-acoustic transducer and process for manufacturing same
GB2079053B (en) * 1980-06-30 1984-03-28 Tokyo Shibaura Electric Co Electret device
US4443711A (en) * 1980-06-30 1984-04-17 Tokyo Shibaura Denki Kabushiki Kaisha Electret device
US4390800A (en) * 1980-06-30 1983-06-28 Tokyo Shibaura Denki Kabushiki Kaisha Electret device
NL8004351A (en) * 1980-07-30 1982-03-01 Philips Nv ELECTRIC CONVERTER.
JPS57188105A (en) * 1981-05-14 1982-11-19 Toshiba Corp Electret constituent
US4429193A (en) * 1981-11-20 1984-01-31 Bell Telephone Laboratories, Incorporated Electret transducer with variable effective air gap
US4434327A (en) * 1981-11-20 1984-02-28 Bell Telephone Laboratories, Incorporated Electret transducer with variable actual air gap
US4442324A (en) * 1982-06-24 1984-04-10 Tibbetts Industries, Inc. Encapsulated backplate for electret transducers
US4891843A (en) * 1983-02-24 1990-01-02 At&T Technologies, Inc. Electret microphone
US4513049A (en) * 1983-04-26 1985-04-23 Mitsui Petrochemical Industries, Ltd. Electret article
JPS59228919A (en) * 1983-06-09 1984-12-22 Fuji Xerox Co Ltd Electret honeycomb filter
US4654546A (en) * 1984-11-20 1987-03-31 Kari Kirjavainen Electromechanical film and procedure for manufacturing same
FR2603422B1 (en) * 1986-08-27 1988-12-30 Inst Francais Du Petrole PROCESS FOR PRODUCING CONTINUOUS PIEZOELECTRIC SENSORS OF INCREASED SENSITIVITY AND SENSORS CARRIED OUT ACCORDING TO THE PROCESS
JPH03141936A (en) * 1989-10-30 1991-06-17 Fujitsu Ltd Ultrasonic probe
EP0462311B1 (en) * 1990-06-21 1995-04-05 Siemens Aktiengesellschaft Composite ultrasound transducer and fabrication process of a structured component from piezoelectric ceramic
FI913741A (en) * 1991-08-06 1993-02-07 Kari Johannes Kirjavainen ELASTIC ELECTRIC MEMBRANE
JP2787790B2 (en) * 1991-11-19 1998-08-20 富士写真フイルム株式会社 Magnetic recording medium and method of manufacturing the same
GB9225898D0 (en) * 1992-12-11 1993-02-03 Univ Strathclyde Ultrasonic transducer
JP3094717B2 (en) * 1993-02-09 2000-10-03 株式会社村田製作所 Piezoelectric resonance components
FI104611B (en) * 1993-06-21 2000-02-29 Panphonics Oy Pleated energy converter
US5682075A (en) * 1993-07-14 1997-10-28 The University Of British Columbia Porous gas reservoir electrostatic transducer
US5395592A (en) * 1993-10-04 1995-03-07 Bolleman; Brent Acoustic liquid processing device
KR950010936A (en) * 1993-10-20 1995-05-15 시바타 미노루 Electret filter
US5559387A (en) * 1994-05-13 1996-09-24 Beurrier; Henry R. Piezoelectric actuators
US5889354A (en) * 1994-08-29 1999-03-30 Oceaneering International Inc. Piezoelectric unit cell
US5530678A (en) * 1994-12-05 1996-06-25 Alliant Techsystems Inc. Real-time calibration acoustic array
FI97577C (en) * 1994-12-28 1997-01-10 Screentec Ky Keyboard
US6429670B2 (en) * 1995-07-18 2002-08-06 Murata Manufacturing Co., Ltd. Method of examining posture of an electronic part
WO1997036365A1 (en) * 1996-03-26 1997-10-02 Stefan Johansson An actuator motor and a method for fabrication of such an actuator
US6689948B2 (en) * 1996-04-17 2004-02-10 B-Band Oy Transducer and method for forming a transducer
US5901928A (en) * 1996-06-14 1999-05-11 Aptek, Inc. Active turbulence control technique for drag reduction
FI963988A0 (en) * 1996-10-04 1996-10-04 Kari Johannes Kirjavainen Ljud- och vibrationsisoleringsfoerfarande
US6376971B1 (en) * 1997-02-07 2002-04-23 Sri International Electroactive polymer electrodes
US6304662B1 (en) * 1998-01-07 2001-10-16 American Technology Corporation Sonic emitter with foam stator
US6043590A (en) * 1997-04-18 2000-03-28 Atl Ultrasound Composite transducer with connective backing block
CN1299247A (en) * 1998-07-03 2001-06-13 阿巴茨医疗技术有限公司 Planar transducer for measuring biomedical pressures
US6184608B1 (en) * 1998-12-29 2001-02-06 Honeywell International Inc. Polymer microactuator array with macroscopic force and displacement
US6346761B1 (en) * 1999-01-27 2002-02-12 Hitachi Denshi Kabushiki Kaisha Surface acoustic wave device capable of suppressing spurious response due to non-harmonic higher-order modes
JP2000218112A (en) * 1999-01-29 2000-08-08 Matsushita Electric Ind Co Ltd Dust collecting filter and air conditioner
US6555945B1 (en) * 1999-02-25 2003-04-29 Alliedsignal Inc. Actuators using double-layer charging of high surface area materials
CA2315417A1 (en) * 1999-08-11 2001-02-11 Hiroshi Une Electret capacitor microphone
US6438242B1 (en) * 1999-09-07 2002-08-20 The United States Of America As Represented By The Secretary Of The Navy Acoustic transducer panel
US6255761B1 (en) * 1999-10-04 2001-07-03 The United States Of America As Represented By The Secretary Of The Navy Shaped piezoelectric composite transducer
JP2001230462A (en) * 2000-02-17 2001-08-24 Minolta Co Ltd Piezoelectric transducer
US6568286B1 (en) * 2000-06-02 2003-05-27 Honeywell International Inc. 3D array of integrated cells for the sampling and detection of air bound chemical and biological species
US6646364B1 (en) * 2000-07-11 2003-11-11 Honeywell International Inc. MEMS actuator with lower power consumption and lower cost simplified fabrication
WO2002084754A2 (en) * 2000-10-25 2002-10-24 Washington State University Research Foundation Piezoelectric micro-transducers, methods of use and manufacturing methods for same
US6507682B2 (en) * 2001-04-06 2003-01-14 Ngk Insulators, Ltd. Optical switch

Also Published As

Publication number Publication date
ATE422140T1 (en) 2009-02-15
DE60041500D1 (en) 2009-03-19
FI108204B (en) 2001-11-30
NO20022473L (en) 2002-05-27
US6759769B2 (en) 2004-07-06
US20030052570A1 (en) 2003-03-20
EP1232669B1 (en) 2009-01-28
FI19992514A (en) 2001-05-26
AU1866401A (en) 2001-06-04
NO20022473D0 (en) 2002-05-24
JP2003515919A (en) 2003-05-07
WO2001039544A1 (en) 2001-05-31
EP1232669A1 (en) 2002-08-21
CA2392552C (en) 2010-01-26

Similar Documents

Publication Publication Date Title
CA2392552A1 (en) Electromechanic film and acoustic element
CN104902408B (en) Support construction and the method for forming support construction
US8666094B2 (en) Drive control method of electrostatic-type ultrasonic transducer, electrostatic-type ultrasonic transducer, ultrasonic speaker using electrostatic-type ultrasonic transducer, audio signal reproducing method, superdirectional acoustic system, and display
US7898159B2 (en) Compliant electroactive polymer transducers for sonic applications
US8391520B2 (en) Flat speaker unit and speaker device therewith
JP4388603B2 (en) Elastic dielectric polymer film acoustic wave actuator
TWI271758B (en) Variable capacitor and method of manufacturing variable capacitor
WO2016158518A1 (en) Electroacoustic transducer
US11101497B2 (en) All-solid state secondary battery and method for manufacturing same
CA2159900A1 (en) High pressure low impedance electrostatic transducer
US20190006961A1 (en) Triboelectric generator and network for mechanical energy harvesting
US8736147B1 (en) Sound and vibration harnessing energy generator
WO2017002573A1 (en) Electro-acoustic converter
TWI406574B (en) Electret transducer with solar power
CN101646118B (en) Flexible actuator
WO2017030045A1 (en) Electroacoustic conversion film, method for producing electroacoustic conversion film and electroacoustic transducer
WO2004042850A3 (en) Method for the production of lithium-polymer batteries by means of compound systems
Tadesse et al. Polypyrrole–polyvinylidene difluoride composite stripe and zigzag actuators for use in facial robotics
KR20110128968A (en) Transparent and directivity-allowed speaker made with cellulose piezo-paper
FI129536B (en) Electrostatic film structure and electrostatic element
CN116112851A (en) Film electroacoustic conversion device and audio-visual system
Okamoto et al. Improving an electret energy harvester by redirecting the electric field
CN1368745A (en) Packaging method for electric accumulating unit of supercapacitance energy accumulator
JPS60224400A (en) Thin piezoelectric speaker
WO2010135925A1 (en) Flat speaker unit and sperker device therwith

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed