DE69407592D1 - Hochdruck niedrigerimpedanz elektrostatischer wandler - Google Patents

Hochdruck niedrigerimpedanz elektrostatischer wandler

Info

Publication number
DE69407592D1
DE69407592D1 DE69407592T DE69407592T DE69407592D1 DE 69407592 D1 DE69407592 D1 DE 69407592D1 DE 69407592 T DE69407592 T DE 69407592T DE 69407592 T DE69407592 T DE 69407592T DE 69407592 D1 DE69407592 D1 DE 69407592D1
Authority
DE
Germany
Prior art keywords
gap
sheets
regions
high pressure
low impedance
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.)
Expired - Fee Related
Application number
DE69407592T
Other languages
English (en)
Other versions
DE69407592T2 (de
Inventor
Lorne Whitehead
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.)
University of British Columbia
Original Assignee
University of British Columbia
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 University of British Columbia filed Critical University of British Columbia
Application granted granted Critical
Publication of DE69407592D1 publication Critical patent/DE69407592D1/de
Publication of DE69407592T2 publication Critical patent/DE69407592T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0292—Electrostatic transducers, e.g. electret-type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
    • H02N1/002—Electrostatic motors
    • H02N1/006—Electrostatic motors of the gap-closing type

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measuring Fluid Pressure (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
DE69407592T 1993-07-14 1994-07-12 Hochdruck niedrigerimpedanz elektrostatischer wandler Expired - Fee Related DE69407592T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/091,009 US5450498A (en) 1993-07-14 1993-07-14 High pressure low impedance electrostatic transducer
PCT/CA1994/000379 WO1995002464A1 (en) 1993-07-14 1994-07-12 High pressure low impedance electrostatic transducer

Publications (2)

Publication Number Publication Date
DE69407592D1 true DE69407592D1 (de) 1998-02-05
DE69407592T2 DE69407592T2 (de) 1998-08-20

Family

ID=22225343

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69407592T Expired - Fee Related DE69407592T2 (de) 1993-07-14 1994-07-12 Hochdruck niedrigerimpedanz elektrostatischer wandler

Country Status (8)

Country Link
US (1) US5450498A (de)
EP (1) EP0708689B1 (de)
JP (1) JPH09500247A (de)
AT (1) ATE161439T1 (de)
AU (1) AU7224494A (de)
CA (1) CA2159900A1 (de)
DE (1) DE69407592T2 (de)
WO (1) WO1995002464A1 (de)

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US5966667A (en) * 1997-07-14 1999-10-12 Motorola, Inc. Dual mode communication device and method
US6420814B1 (en) * 1999-05-18 2002-07-16 Stephen M. Bobbio Spiral wound transducer
WO2002015378A1 (fr) * 2000-08-11 2002-02-21 Ecchandes Inc. Stator piezoelectrique de type a recouvrement, actionneur piezoelectrique de type a recouvrement et applications associees
US7064740B2 (en) 2001-11-09 2006-06-20 Sharp Laboratories Of America, Inc. Backlit display with improved dynamic range
US6793177B2 (en) 2002-11-04 2004-09-21 The Bonutti 2003 Trust-A Active drag and thrust modulation system and method
US7623105B2 (en) 2003-11-21 2009-11-24 Sharp Laboratories Of America, Inc. Liquid crystal display with adaptive color
WO2005067453A2 (en) 2003-12-18 2005-07-28 Sharp Laboratories Of America, Inc. Dynamic gamma for a liquid crystal display
US7030536B2 (en) * 2003-12-29 2006-04-18 General Electric Company Micromachined ultrasonic transducer cells having compliant support structure
US7598651B2 (en) * 2004-03-12 2009-10-06 Sri International Mechanical meta-materials
US7612757B2 (en) 2004-05-04 2009-11-03 Sharp Laboratories Of America, Inc. Liquid crystal display with modulated black point
US8395577B2 (en) 2004-05-04 2013-03-12 Sharp Laboratories Of America, Inc. Liquid crystal display with illumination control
US7505018B2 (en) 2004-05-04 2009-03-17 Sharp Laboratories Of America, Inc. Liquid crystal display with reduced black level insertion
US7777714B2 (en) 2004-05-04 2010-08-17 Sharp Laboratories Of America, Inc. Liquid crystal display with adaptive width
US7532192B2 (en) 2004-05-04 2009-05-12 Sharp Laboratories Of America, Inc. Liquid crystal display with filtered black point
US7872631B2 (en) 2004-05-04 2011-01-18 Sharp Laboratories Of America, Inc. Liquid crystal display with temporal black point
US7602369B2 (en) 2004-05-04 2009-10-13 Sharp Laboratories Of America, Inc. Liquid crystal display with colored backlight
JP2005354582A (ja) * 2004-06-14 2005-12-22 Seiko Epson Corp 超音波トランスデューサ及びこれを用いた超音波スピーカ
US7023451B2 (en) 2004-06-14 2006-04-04 Sharp Laboratories Of America, Inc. System for reducing crosstalk
US7556836B2 (en) 2004-09-03 2009-07-07 Solae, Llc High protein snack product
US7898519B2 (en) 2005-02-17 2011-03-01 Sharp Laboratories Of America, Inc. Method for overdriving a backlit display
US7525528B2 (en) 2004-11-16 2009-04-28 Sharp Laboratories Of America, Inc. Technique that preserves specular highlights
US8050512B2 (en) 2004-11-16 2011-11-01 Sharp Laboratories Of America, Inc. High dynamic range images from low dynamic range images
US8050511B2 (en) 2004-11-16 2011-11-01 Sharp Laboratories Of America, Inc. High dynamic range images from low dynamic range images
JP4706578B2 (ja) * 2005-09-27 2011-06-22 セイコーエプソン株式会社 静電型超音波トランスデューサ、静電型超音波トランスデューサの設計方法、静電型超音波トランスデューサの設計装置、静電型超音波トランスデューサの設計プログラム、製造方法及び表示装置
JP2008042869A (ja) * 2005-10-05 2008-02-21 Seiko Epson Corp 静電型超音波トランスデューサ、超音波スピーカ、音声信号再生方法、超指向性音響システム及び表示装置
US8121401B2 (en) 2006-01-24 2012-02-21 Sharp Labortories of America, Inc. Method for reducing enhancement of artifacts and noise in image color enhancement
US9143657B2 (en) 2006-01-24 2015-09-22 Sharp Laboratories Of America, Inc. Color enhancement technique using skin color detection
US8941580B2 (en) 2006-11-30 2015-01-27 Sharp Laboratories Of America, Inc. Liquid crystal display with area adaptive backlight
US11778385B2 (en) * 2017-06-23 2023-10-03 Cochlear Limited Electromagnetic transducer with non-axial air gap
US11012788B2 (en) * 2018-03-27 2021-05-18 Sony Corporation Loudspeaker system
JP7149585B2 (ja) * 2018-12-17 2022-10-07 株式会社オーディオテクニカ 電気音響変換器及び電気音響変換装置

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DE892773C (de) * 1941-04-17 1953-10-12 Siemens Ag Kondensator-Mikrofon
NL281794A (de) * 1961-08-07
US3544733A (en) * 1967-06-15 1970-12-01 Minnesota Mining & Mfg Electrostatic acoustic transducer
FR2199430A5 (de) * 1972-09-08 1974-04-05 Anvar
NL7216501A (de) * 1972-12-06 1974-06-10
US3980838A (en) * 1974-02-20 1976-09-14 Tokyo Shibaura Electric Co., Ltd. Plural electret electroacoustic transducer
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US4081626A (en) * 1976-11-12 1978-03-28 Polaroid Corporation Electrostatic transducer having narrowed directional characteristic
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US4160881A (en) * 1977-12-28 1979-07-10 Microtel B.V. Electret transducers: acoustically transparent backplate of sintered conductive spheres and a thin electret coating; meshlike diaphragm spacing screen overlays apertured electret backplate with screen junctions overlaying the apertures
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
US4246449A (en) * 1979-04-24 1981-01-20 Polaroid Corporation Electrostatic transducer having optimum sensitivity and damping
NL8004351A (nl) * 1980-07-30 1982-03-01 Philips Nv Elektreetomzetter.
JPS5846800A (ja) * 1981-09-14 1983-03-18 Matsushita Electric Works Ltd 静電型超音波振動子
US4434327A (en) * 1981-11-20 1984-02-28 Bell Telephone Laboratories, Incorporated Electret transducer with variable actual air gap
US4439642A (en) * 1981-12-28 1984-03-27 Polaroid Corporation High energy ultrasonic transducer
DE3228939C1 (de) * 1982-08-03 1983-11-24 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Verfahren und Einrichtung zur Beeinflussung der Grenzschicht von umstroemten Koerpern
AU573655B2 (en) * 1983-12-05 1988-06-16 Kay, L. Transducer array
US4670339A (en) * 1984-06-04 1987-06-02 Advanced Technology Laboratories, Inc. Electrically conductive thin epoxy bond
US4632856A (en) * 1985-02-06 1986-12-30 Marcus Michael A Multilayer thin film electrical devices free of adhesive
CA1277415C (en) * 1986-04-11 1990-12-04 Lorne A. Whitehead Elastomer membrane enhanced electrostatic transducer
US4730283A (en) * 1986-09-15 1988-03-08 Industrial Research Products, Inc. Acoustic transducer with improved electrode spacing
GB8704314D0 (en) * 1987-02-24 1987-04-01 Scient Generics Ltd Noise attenuation
US4887248A (en) * 1988-07-07 1989-12-12 Cleveland Machine Controls, Inc. Electrostatic transducer and method of making and using same
US5206806A (en) * 1989-01-10 1993-04-27 Gerardi Joseph J Smart skin ice detection and de-icing system
US5206557A (en) * 1990-11-27 1993-04-27 Mcnc Microelectromechanical transducer and fabrication method

Also Published As

Publication number Publication date
AU7224494A (en) 1995-02-13
DE69407592T2 (de) 1998-08-20
EP0708689B1 (de) 1997-12-29
WO1995002464A1 (en) 1995-01-26
US5450498A (en) 1995-09-12
JPH09500247A (ja) 1997-01-07
EP0708689A1 (de) 1996-05-01
ATE161439T1 (de) 1998-01-15
CA2159900A1 (en) 1995-01-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee