CA2166378A1 - Piezoelectric Transformer - Google Patents

Piezoelectric Transformer

Info

Publication number
CA2166378A1
CA2166378A1 CA2166378A CA2166378A CA2166378A1 CA 2166378 A1 CA2166378 A1 CA 2166378A1 CA 2166378 A CA2166378 A CA 2166378A CA 2166378 A CA2166378 A CA 2166378A CA 2166378 A1 CA2166378 A1 CA 2166378A1
Authority
CA
Canada
Prior art keywords
region
substrate
stress
polarized
side region
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
CA2166378A
Other languages
French (fr)
Other versions
CA2166378C (en
Inventor
Kouichi Kanayama
Nobuhiro Maruko
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.)
Mitsui Chemicals Inc
Original Assignee
Mitsui Petrochemical Industries 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
Priority claimed from JP14557795A external-priority patent/JP3239047B2/en
Priority claimed from JP25460695A external-priority patent/JPH0974235A/en
Priority claimed from JP7290440A external-priority patent/JPH09107135A/en
Application filed by Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Publication of CA2166378A1 publication Critical patent/CA2166378A1/en
Application granted granted Critical
Publication of CA2166378C publication Critical patent/CA2166378C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/40—Piezoelectric or electrostrictive devices with electrical input and electrical output, e.g. functioning as transformers

Abstract

A piezoelectric transformer has a piezoelectric substrate having first and second main faces. The substrate has first and second primary-side regions and a secondary-side region in its longitudinal direction in this order. The first region has a length of a half wavelength of stress distribution at the time of resonance in the longitudinal direction and has either positive or negative stress. The second region has a length of a half wavelength or less of the stress distribution and has either positive or negative stress. First and second electrode are respectively disposed on the first and second main faces in the first primary-side region, and the substrate between the first and second electrodes is polarized in the thicknesswise direction. Third and fourth electrodes are respectively disposed on the first and second main faces in the second primary-side region, and the substrate between the third and fourth electrodes is polarized in the thicknesswise direction. A secondary-side electrode is disposed in the secondary-side region, and the secondary-side region is polarized in the longitudinal direction.
Directions of polarization and stress of the first and second regions and the electrical connection among the first to fourth electrode are determined in order for the second region to enhance the resonance of the substrate excited by the first region.
CA002166378A 1994-12-30 1995-12-29 Piezoelectric transformer Expired - Fee Related CA2166378C (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP6-339708 1994-12-30
JP33970894 1994-12-30
JP14557795A JP3239047B2 (en) 1995-05-18 1995-05-18 Piezoelectric transformer and inverter and liquid crystal display incorporating the same
JP7-145577 1995-05-18
JP7-254606 1995-09-05
JP25460695A JPH0974235A (en) 1995-09-05 1995-09-05 Piezo-electric transformer
JP7290440A JPH09107135A (en) 1995-10-11 1995-10-11 Piezoelectric transformer
JP7-290440 1995-10-11

Publications (2)

Publication Number Publication Date
CA2166378A1 true CA2166378A1 (en) 1996-07-01
CA2166378C CA2166378C (en) 1999-11-09

Family

ID=27472645

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002166378A Expired - Fee Related CA2166378C (en) 1994-12-30 1995-12-29 Piezoelectric transformer

Country Status (4)

Country Link
US (1) US5701049A (en)
EP (1) EP0720246B1 (en)
CN (1) CN1132944A (en)
CA (1) CA2166378C (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5929554A (en) * 1994-12-30 1999-07-27 Mitsui Chemicals, Inc. Piezoelectric transformer
TW420883B (en) * 1996-02-08 2001-02-01 Tokin Corp A piezoelectric transformer
DE69722691T2 (en) * 1996-02-14 2003-12-18 Murata Manufacturing Co Piezoelectric transformer
JP2962231B2 (en) * 1996-06-18 1999-10-12 日本電気株式会社 Piezoelectric transformer
JP3050130B2 (en) * 1996-07-31 2000-06-12 日本電気株式会社 Piezoelectric transformer and its abnormal operation detection and protection device
EP0865673B1 (en) * 1996-10-10 2003-04-23 Koninklijke Philips Electronics N.V. Piezo-electric transformer
WO1998025441A2 (en) * 1996-12-02 1998-06-11 Koninklijke Philips Electronics N.V. Circuit arrangement
US5977688A (en) * 1997-03-28 1999-11-02 Seiko Instruments R & D Center Inc. Electronic apparatus for being switched using piezoelectric element
EP1406062B1 (en) * 1997-05-28 2012-05-30 Murata Manufacturing Co., Ltd. Vibrating gyroscope
US5872419A (en) * 1997-09-04 1999-02-16 Motorola Inc. Piezoelectric transformer with voltage feedback
US6084336A (en) * 1997-09-17 2000-07-04 Matsushita Electric Industrial Co., Ltd. Piezoelectric transformer
US6291925B1 (en) 1998-01-12 2001-09-18 Massachusetts Institute Of Technology Apparatus and methods for reversible imaging of nonemissive display systems
US6342753B1 (en) 2000-09-25 2002-01-29 Rockwell Technologies, Llc Piezoelectric transformer and operating method
US6812623B2 (en) * 2001-09-28 2004-11-02 Matsushita Electric Industrial Co., Ltd. Piezoelectric transformer
US6747401B2 (en) * 2002-07-01 2004-06-08 Advancewave Technology, Inc. Augmenting surface electrode for piezoelectric workpiece
US8569937B1 (en) * 2010-07-13 2013-10-29 Hrl Laboratories, Llc Piezoelectric resonator with capacitive sense and/or force rebalance electrodes to control an amplitude of vibration
US20130134838A1 (en) * 2011-11-28 2013-05-30 Qualcomm Mems Technologies, Inc. Piezoelectric mems transformer
US8933759B1 (en) 2012-07-13 2015-01-13 Hrl Laboratories, Llc Dynamic damping in a quartz oscillator
DE102017105410A1 (en) * 2017-03-14 2018-09-20 Epcos Ag plasma generator
CN114113937B (en) * 2021-11-19 2024-03-08 天津大学 Experimental method for insulation degradation of polymer material under mechanical stress

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3562792A (en) * 1968-06-04 1971-02-09 Clevite Corp Piezoelectric transformer
US3736446A (en) * 1968-06-04 1973-05-29 Vernitron Corp Piezoelectric transformer
US3660699A (en) * 1969-08-06 1972-05-02 Denki Onkyo Co Ltd Supporting means for piezoelectric transformers
US3689781A (en) 1969-11-22 1972-09-05 Denki Onkyo Co Ltd Voltage transforming devices utilizing piezoelectric elements
US5371430A (en) * 1991-02-12 1994-12-06 Fujitsu Limited Piezoelectric transformer producing an output A.C. voltage with reduced distortion
JP3088499B2 (en) * 1991-07-16 2000-09-18 株式会社トーキン Piezoelectric transformer
JP3194234B2 (en) * 1991-10-18 2001-07-30 株式会社トーキン Piezoelectric ceramic rectangular plate, method of manufacturing the same, piezoelectric transformer using the piezoelectric ceramic, and oscillation circuit using the piezoelectric transformer
JP2730378B2 (en) * 1992-02-14 1998-03-25 日本電気株式会社 Piezoelectric transformer and driving method thereof
EP0605901B1 (en) * 1992-12-31 1996-10-09 Nec Corporation A piezoelectric transformer having improved electrode arrangement
JP2536379B2 (en) * 1992-12-31 1996-09-18 日本電気株式会社 Piezoelectric transformer
JP3018882B2 (en) * 1992-12-31 2000-03-13 日本電気株式会社 Piezoelectric transformer
JP2508575B2 (en) * 1993-01-28 1996-06-19 日本電気株式会社 Piezoelectric transformer and its driving method
JP3230330B2 (en) * 1993-05-10 2001-11-19 株式会社大真空 Piezoelectric transformer device
JPH06334235A (en) * 1993-05-19 1994-12-02 Tamura Seisakusho Co Ltd Piezoelectric transformer
JP2967564B2 (en) * 1993-06-17 1999-10-25 株式会社大真空 Piezoelectric transformer
US5504384A (en) * 1993-06-23 1996-04-02 Industrial Technology Research Institute Multi-mode adjustable piezoelectric transformer
JP3020769B2 (en) * 1993-06-29 2000-03-15 インダストリアル・テクノロジー・リサーチ・インスティテュート Multi-mode configurable piezoelectric transducer

Also Published As

Publication number Publication date
CN1132944A (en) 1996-10-09
US5701049A (en) 1997-12-23
EP0720246A3 (en) 1996-07-10
CA2166378C (en) 1999-11-09
EP0720246A2 (en) 1996-07-03
EP0720246B1 (en) 2000-05-10

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed