TW345771B - Power source unit employing piezoelectric transformer a high power source unit employing a piezoelectric transformer detects whether the output of the piezoelectric transformer reaches a predetermined value or not. - Google Patents
Power source unit employing piezoelectric transformer a high power source unit employing a piezoelectric transformer detects whether the output of the piezoelectric transformer reaches a predetermined value or not.Info
- Publication number
- TW345771B TW345771B TW085102979A TW85102979A TW345771B TW 345771 B TW345771 B TW 345771B TW 085102979 A TW085102979 A TW 085102979A TW 85102979 A TW85102979 A TW 85102979A TW 345771 B TW345771 B TW 345771B
- Authority
- TW
- Taiwan
- Prior art keywords
- piezoelectric transformer
- power source
- source unit
- frequency
- driving
- Prior art date
Links
- 238000001514 detection method Methods 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
- H05B41/2822—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
-
- 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
- H10N30/80—Constructional details
- H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits
- H10N30/804—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits for piezoelectric transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
- Control Or Security For Electrophotography (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7047695A JP2757810B2 (ja) | 1995-03-08 | 1995-03-08 | 電源装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW345771B true TW345771B (en) | 1998-11-21 |
Family
ID=12782424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW085102979A TW345771B (en) | 1995-03-08 | 1996-03-12 | Power source unit employing piezoelectric transformer a high power source unit employing a piezoelectric transformer detects whether the output of the piezoelectric transformer reaches a predetermined value or not. |
Country Status (4)
Country | Link |
---|---|
US (1) | US5731652A (zh) |
JP (1) | JP2757810B2 (zh) |
KR (1) | KR100206673B1 (zh) |
TW (1) | TW345771B (zh) |
Families Citing this family (47)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2845209B2 (ja) * | 1996-08-23 | 1999-01-13 | 日本電気株式会社 | 圧電トランスインバータ及びその制御回路並びに駆動方法 |
JP3412736B2 (ja) * | 1996-09-11 | 2003-06-03 | 松下電器産業株式会社 | 圧電トランス駆動装置、圧電トランスおよび液晶表示装置 |
JP3063645B2 (ja) * | 1996-10-24 | 2000-07-12 | 日本電気株式会社 | 圧電トランスの駆動回路 |
JP2923873B2 (ja) * | 1996-12-03 | 1999-07-26 | 日本電気株式会社 | 圧電トランスの制御方法及び駆動回路 |
JP2923878B2 (ja) * | 1997-01-28 | 1999-07-26 | 日本電気株式会社 | 圧電トランスの駆動回路 |
JP3216572B2 (ja) * | 1997-05-27 | 2001-10-09 | 日本電気株式会社 | 圧電トランスの駆動回路 |
JP3246397B2 (ja) * | 1997-06-19 | 2002-01-15 | 日本電気株式会社 | 圧電トランスの駆動回路 |
CN1237320A (zh) * | 1997-09-01 | 1999-12-01 | 皇家菲利浦电子有限公司 | 电路装置 |
EP0910229A3 (en) * | 1997-10-16 | 1999-08-25 | Tokin Corporation | Cold-cathode tube lighting circuit with protection circuit for piezoelectric transformer |
JPH11206156A (ja) * | 1997-11-14 | 1999-07-30 | Canon Inc | 振動型モータのための制御装置 |
JP2907204B1 (ja) * | 1998-02-26 | 1999-06-21 | 日本電気株式会社 | 圧電トランス駆動回路及び駆動方法 |
JP3257505B2 (ja) * | 1998-03-31 | 2002-02-18 | 株式会社村田製作所 | 圧電トランスインバータ |
GB2337157B (en) * | 1998-05-08 | 2002-08-21 | Kigass Electronics Ltd | Piezoelectric transformers |
JP3237614B2 (ja) * | 1998-06-19 | 2001-12-10 | 日本電気株式会社 | 圧電トランスの駆動方法及び駆動回路 |
JP3269460B2 (ja) * | 1998-07-29 | 2002-03-25 | 日本電気株式会社 | 圧電トランス駆動回路及び駆動方法 |
JP3282594B2 (ja) * | 1998-10-05 | 2002-05-13 | 株式会社村田製作所 | 圧電トランスインバータ |
WO2000024115A1 (fr) * | 1998-10-21 | 2000-04-27 | Matsushita Electric Industrial Co., Ltd. | Circuit d'excitation pour transformateur piezo-electrique |
JP2000268988A (ja) * | 1999-03-18 | 2000-09-29 | Nippon Soken Inc | 放電灯駆動装置 |
US6583534B1 (en) * | 1999-06-07 | 2003-06-24 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric transformer, piezoelectric transformer drive circuit, piezoelectric transformer drive method and cold cathode tube drive apparatus using piezoelectric transformer |
US6804129B2 (en) * | 1999-07-22 | 2004-10-12 | 02 Micro International Limited | High-efficiency adaptive DC/AC converter |
US6259615B1 (en) * | 1999-07-22 | 2001-07-10 | O2 Micro International Limited | High-efficiency adaptive DC/AC converter |
WO2001014945A1 (en) | 1999-08-20 | 2001-03-01 | Texas Instruments Incorporated | Control circuit for piezo transformer based fluorescent lamp power supplies |
US6531831B2 (en) | 2000-05-12 | 2003-03-11 | O2Micro International Limited | Integrated circuit for lamp heating and dimming control |
JP2002063993A (ja) * | 2000-06-08 | 2002-02-28 | Denso Corp | 放電灯駆動装置 |
JP2002064977A (ja) | 2000-08-21 | 2002-02-28 | Matsushita Electric Ind Co Ltd | 圧電トランスの駆動方法及び電源装置 |
DE10048189A1 (de) * | 2000-09-28 | 2002-04-11 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Schaltungsanordnung zur Regelung eines analogen Spannungssignals |
US6501234B2 (en) * | 2001-01-09 | 2002-12-31 | 02 Micro International Limited | Sequential burst mode activation circuit |
US6570344B2 (en) | 2001-05-07 | 2003-05-27 | O2Micro International Limited | Lamp grounding and leakage current detection system |
CA2447880C (en) * | 2001-05-24 | 2009-04-07 | Fred A. Brown | Stator with multiple winding configurations |
JP2005196969A (ja) * | 2001-09-14 | 2005-07-21 | Shin-Etsu Engineering Co Ltd | 誘電体バリア放電装置 |
US6639367B2 (en) | 2002-02-27 | 2003-10-28 | Texas Instruments Incorporated | Control circuit employing preconditioned feedback amplifier for initializing VCO operating frequency |
US7515446B2 (en) * | 2002-04-24 | 2009-04-07 | O2Micro International Limited | High-efficiency adaptive DC/AC converter |
US6856519B2 (en) | 2002-05-06 | 2005-02-15 | O2Micro International Limited | Inverter controller |
US6873322B2 (en) * | 2002-06-07 | 2005-03-29 | 02Micro International Limited | Adaptive LCD power supply circuit |
US6756769B2 (en) | 2002-06-20 | 2004-06-29 | O2Micro International Limited | Enabling circuit for avoiding negative voltage transients |
US6949912B2 (en) | 2002-06-20 | 2005-09-27 | 02Micro International Limited | Enabling circuit for avoiding negative voltage transients |
KR100900463B1 (ko) * | 2002-12-06 | 2009-06-02 | 삼성전자주식회사 | 전원공급장치 및 이를 이용한 액정표시장치 |
EP1432111A3 (en) * | 2002-12-18 | 2006-04-12 | Hephaist Seiko Co., Ltd. | Control method and apparatus of an ultrasonic motor, and an ultrasonic motor driver and controller |
US6778415B2 (en) * | 2003-01-22 | 2004-08-17 | O2Micro, Inc. | Controller electrical power circuit supplying energy to a display device |
US7057611B2 (en) | 2003-03-25 | 2006-06-06 | 02Micro International Limited | Integrated power supply for an LCD panel |
US6936975B2 (en) * | 2003-04-15 | 2005-08-30 | 02Micro International Limited | Power supply for an LCD panel |
US7567366B2 (en) * | 2003-05-29 | 2009-07-28 | Seiko Epson Corporation | Image scanner provided with power saving mode and a system having a power saving mode |
US6897698B1 (en) | 2003-05-30 | 2005-05-24 | O2Micro International Limited | Phase shifting and PWM driving circuits and methods |
US7394209B2 (en) * | 2004-02-11 | 2008-07-01 | 02 Micro International Limited | Liquid crystal display system with lamp feedback |
US7579749B2 (en) * | 2005-07-08 | 2009-08-25 | Canon Kabushiki Kaisha | Power supply device and image forming apparatus using the power supply device |
JP5077020B2 (ja) * | 2008-03-31 | 2012-11-21 | 株式会社Jvcケンウッド | 無線受信機のlcdバックライト駆動装置 |
WO2014145587A1 (en) * | 2013-03-15 | 2014-09-18 | Bradley William M | Frequency tracking piezoelectric transformer power converter with simultaneous two-parameter control |
Family Cites Families (15)
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JPS61220386A (ja) * | 1985-03-27 | 1986-09-30 | Hitachi Ltd | 高電圧発生装置 |
US5095890A (en) * | 1988-02-09 | 1992-03-17 | Mettler Electronics Corp. | Method for sampled data frequency control of an ultrasound power generating system |
JPH01234073A (ja) * | 1988-03-14 | 1989-09-19 | Olympus Optical Co Ltd | 振動波モータの駆動回路 |
US4868445A (en) * | 1988-06-20 | 1989-09-19 | Wand Saul N | Self tuned ultrasonic generator system having wide frequency range and high efficiency |
US5113116A (en) * | 1989-10-05 | 1992-05-12 | Firma J. Eberspacher | Circuit arrangement for accurately and effectively driving an ultrasonic transducer |
EP0654889B1 (en) * | 1990-02-14 | 1999-05-06 | Nikon Corporation | Driving device for ultrasonic wave motor |
JPH05210773A (ja) * | 1991-05-07 | 1993-08-20 | Toshiba Corp | 情報表示装置 |
JPH0564437A (ja) * | 1991-08-30 | 1993-03-12 | Toshiba Corp | 高圧電源装置 |
JP3164239B2 (ja) * | 1992-01-16 | 2001-05-08 | オリンパス光学工業株式会社 | 振動波モータの駆動回路 |
JPH05219730A (ja) * | 1992-02-07 | 1993-08-27 | Toshiba Corp | 電源装置 |
JP2987824B2 (ja) * | 1992-02-26 | 1999-12-06 | オリンパス光学工業株式会社 | 超音波モータの駆動回路 |
JP2591423B2 (ja) * | 1992-07-17 | 1997-03-19 | 日本電気株式会社 | 電力用圧電トランスコンバータ |
US5563478A (en) * | 1992-08-18 | 1996-10-08 | Nikon Corporation | Drive control device for an ultrasonic motor |
DE4400210A1 (de) * | 1994-01-05 | 1995-08-10 | Branson Ultraschall | Verfahren und Einrichtung zum Betrieb eines Generators zur HF-Energieversorgung eines Ultraschallwandlers |
JP2751842B2 (ja) * | 1994-10-05 | 1998-05-18 | 日本電気株式会社 | 圧電トランスの駆動回路および駆動方法 |
-
1995
- 1995-03-08 JP JP7047695A patent/JP2757810B2/ja not_active Expired - Fee Related
-
1996
- 1996-03-08 KR KR1019960006081A patent/KR100206673B1/ko not_active IP Right Cessation
- 1996-03-08 US US08/613,224 patent/US5731652A/en not_active Expired - Lifetime
- 1996-03-12 TW TW085102979A patent/TW345771B/zh active
Also Published As
Publication number | Publication date |
---|---|
JP2757810B2 (ja) | 1998-05-25 |
US5731652A (en) | 1998-03-24 |
KR100206673B1 (ko) | 1999-07-01 |
KR960036261A (ko) | 1996-10-28 |
JPH08251929A (ja) | 1996-09-27 |
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