DE3888278D1 - Hochfrequenzvorschaltgerät für Entladungsgaslampen. - Google Patents
Hochfrequenzvorschaltgerät für Entladungsgaslampen.Info
- Publication number
- DE3888278D1 DE3888278D1 DE88309375T DE3888278T DE3888278D1 DE 3888278 D1 DE3888278 D1 DE 3888278D1 DE 88309375 T DE88309375 T DE 88309375T DE 3888278 T DE3888278 T DE 3888278T DE 3888278 D1 DE3888278 D1 DE 3888278D1
- Authority
- DE
- Germany
- Prior art keywords
- frequency
- current
- switches
- varies
- load
- 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
Links
Classifications
-
- 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
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
-
- 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
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2856—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against internal abnormal circuit conditions
-
- 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
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2858—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
-
- 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
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/07—Starting and control circuits for gas discharge lamp using transistors
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/106,180 US4873471A (en) | 1986-03-28 | 1987-10-08 | High frequency ballast for gaseous discharge lamps |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3888278D1 true DE3888278D1 (de) | 1994-04-14 |
DE3888278T2 DE3888278T2 (de) | 1994-09-29 |
Family
ID=22309954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3888278T Expired - Fee Related DE3888278T2 (de) | 1987-10-08 | 1988-10-07 | Hochfrequenzvorschaltgerät für Entladungsgaslampen. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4873471A (de) |
EP (1) | EP0311424B1 (de) |
AT (1) | ATE102781T1 (de) |
DE (1) | DE3888278T2 (de) |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1327991C (en) * | 1986-03-28 | 1994-03-22 | Thomas E. Dean | High frequency ballast for gaseous discharge lamps |
IN171097B (de) * | 1989-03-16 | 1992-07-18 | Holec Syst & Componenten | |
US4970439A (en) * | 1989-04-28 | 1990-11-13 | Minnesota Mining And Manufacturing Company | Power supply circuit for a gaseous discharge tube device |
US5198726A (en) * | 1990-10-25 | 1993-03-30 | U.S. Philips Corporation | Electronic ballast circuit with lamp dimming control |
NL9002681A (nl) * | 1990-12-05 | 1992-07-01 | Nedap Nv | Voorschakelapparaat voor fluorescentielampen. |
DE4101980A1 (de) * | 1991-01-24 | 1992-08-06 | Trilux Lenze Gmbh & Co Kg | Wechselspannungs-vorschaltgeraet fuer elektrische entladungslampen |
US5138234A (en) * | 1991-05-28 | 1992-08-11 | Motorola, Inc. | Circuit for driving a gas discharge lamp load |
US5148087A (en) * | 1991-05-28 | 1992-09-15 | Motorola, Inc. | Circuit for driving a gas discharge lamp load |
US5128592A (en) * | 1991-07-18 | 1992-07-07 | Thomas Industries Inc. | High frequency ballast for gaseous discharge lamps |
DE4128314A1 (de) * | 1991-08-27 | 1993-03-04 | Diehl Gmbh & Co | Stromversorgungsschaltung |
IT1250520B (it) * | 1991-12-11 | 1995-04-08 | Marelli Autronica | Circuito auto-oscillante per il comando di una lampada a scarica di gas,particolarmente per l'impiego a bordo di un autoveicolo. |
JP3026681B2 (ja) * | 1992-06-30 | 2000-03-27 | 三洋電機株式会社 | 蛍光灯制御装置 |
US5287040A (en) * | 1992-07-06 | 1994-02-15 | Lestician Ballast, Inc. | Variable control, current sensing ballast |
EP0596152B1 (de) * | 1992-11-06 | 1998-06-10 | TRILUX-LENZE GmbH & Co. KG | Wechselspannungs-Vorschaltgerät für elektrische Entladungslampen |
US6377087B1 (en) * | 1993-01-19 | 2002-04-23 | U.S. Philips Corporation | Driving scheme for bipolar transistors |
US5404082A (en) * | 1993-04-23 | 1995-04-04 | North American Philips Corporation | High frequency inverter with power-line-controlled frequency modulation |
DE69413105T2 (de) * | 1993-04-23 | 1999-04-15 | Koninkl Philips Electronics Nv | Schaltung zur Leistungsfaktorverbesserung |
US5410221A (en) * | 1993-04-23 | 1995-04-25 | Philips Electronics North America Corporation | Lamp ballast with frequency modulated lamp frequency |
CA2095793A1 (fr) * | 1993-05-07 | 1994-11-08 | Raymond Berthiaume | Ballast electronique pour tube fluorescent |
US5545955A (en) * | 1994-03-04 | 1996-08-13 | International Rectifier Corporation | MOS gate driver for ballast circuits |
EP0677982B1 (de) * | 1994-04-15 | 2000-02-09 | Knobel Ag Lichttechnische Komponenten | Verfahren zum Betrieb eines Vorschaltgeräts für Entladungslampen |
US5612597A (en) * | 1994-12-29 | 1997-03-18 | International Rectifier Corporation | Oscillating driver circuit with power factor correction, electronic lamp ballast employing same and driver method |
JP3543236B2 (ja) * | 1995-03-06 | 2004-07-14 | 株式会社キジマ | プッシュプルインバ−タ |
US5703441A (en) * | 1995-11-02 | 1997-12-30 | General Electric Company | Multi-function filament-heater power supply for an electronic ballast for long-life dimmerable lamps |
ES2187633T3 (es) * | 1996-08-13 | 2003-06-16 | Magnetek Spa | Inversor para el suministro de energia a lamparas de descarga con medios para mejorar el factor de potencia. |
US6091206A (en) * | 1996-12-27 | 2000-07-18 | Susan Siao | Electronic ballast system for fluorescent lamps |
US6172468B1 (en) | 1997-01-14 | 2001-01-09 | Metrolight Ltd. | Method and apparatus for igniting a gas discharge lamp |
FR2761564B1 (fr) * | 1997-03-27 | 2001-07-27 | Jacques Emile Boudan | Systeme et appareil d'alimentation des lampes a decharge d'un reseau d'eclairage |
JP4252117B2 (ja) * | 1997-05-16 | 2009-04-08 | 株式会社デンソー | 放電灯装置 |
US6127788A (en) | 1997-05-15 | 2000-10-03 | Denso Corporation | High voltage discharge lamp device |
US5939837A (en) * | 1997-07-15 | 1999-08-17 | Magnetek, Inc. | Electronic ballast circuit for independently increasing the power factor and decreasing the crest factor |
CA2297255A1 (en) * | 1997-07-23 | 1999-02-04 | Yeung, Anne Chon My | Electronic ballast system |
EP0984670B1 (de) | 1998-06-13 | 2009-12-09 | Greenwood Soar IP Limited | Vorschaltgerät für eine Starkstromentladungslampe |
US6495971B1 (en) | 1998-06-13 | 2002-12-17 | Hatch Transformers, Inc. | High intensity discharge lamp ballast |
US6294867B1 (en) | 1999-01-25 | 2001-09-25 | Judd Lynn | Flourescent lamp with uniform output |
US7091676B2 (en) * | 2001-03-15 | 2006-08-15 | The Bodine Company, Inc. | Arc maintenance device for high density discharge lamps including an adaptive wave form monitor |
CN100397276C (zh) * | 2002-11-06 | 2008-06-25 | 台达电子工业股份有限公司 | 电子式电源稳压器 |
US6969956B1 (en) * | 2004-05-07 | 2005-11-29 | Zippy Technology Corp. | Current control apparatus for fluorescent lamps |
US20050264217A1 (en) * | 2004-06-01 | 2005-12-01 | Huston Trevor L | Controller for power protection |
US7589480B2 (en) * | 2006-05-26 | 2009-09-15 | Greenwood Soar Ip Ltd. | High intensity discharge lamp ballast |
US7911808B2 (en) * | 2007-02-10 | 2011-03-22 | Active-Semi, Inc. | Primary side constant output current controller with highly improved accuracy |
FI121049B (fi) | 2007-10-04 | 2010-06-15 | Helvar Oy Ab | Elektroninen liitäntälaite |
US7843141B1 (en) | 2007-11-19 | 2010-11-30 | Universal Lighting Technologies, Inc. | Low cost step dimming interface for an electronic ballast |
US8049432B2 (en) * | 2008-09-05 | 2011-11-01 | Lutron Electronics Co., Inc. | Measurement circuit for an electronic ballast |
US8049430B2 (en) | 2008-09-05 | 2011-11-01 | Lutron Electronics Co., Inc. | Electronic ballast having a partially self-oscillating inverter circuit |
US8067902B2 (en) * | 2008-09-05 | 2011-11-29 | Lutron Electronics Co., Inc. | Electronic ballast having a symmetric topology |
FI121561B (fi) | 2009-06-30 | 2010-12-31 | Helvar Oy Ab | Elektronisen liitäntälaitteen toimintojen säätäminen ja mittaaminen |
JP5429391B2 (ja) * | 2010-09-22 | 2014-02-26 | 株式会社島津製作所 | 高周波電源 |
US9541603B2 (en) * | 2013-07-10 | 2017-01-10 | Apple Inc. | Method and apparatus for power glitch detection in integrated circuits |
Family Cites Families (72)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2928994A (en) * | 1956-10-22 | 1960-03-15 | Widakowich Marius | Transistor inverters for feeding fluorescent tubes |
US3047789A (en) * | 1959-11-25 | 1962-07-31 | Gen Electric | Inverter circuit |
US3072822A (en) * | 1961-05-19 | 1963-01-08 | Julian C Holmes | Emission current regulator |
US3265930A (en) * | 1962-05-03 | 1966-08-09 | Gen Electric | Current level switching apparatus for operating electric discharge lamps |
US3449629A (en) * | 1968-05-16 | 1969-06-10 | Westinghouse Electric Corp | Light,heat and temperature control systems |
US3541421A (en) * | 1968-07-10 | 1970-11-17 | Union Carbide Corp | High power factor circuit for reactive loads |
US3648106A (en) * | 1970-02-24 | 1972-03-07 | Westinghouse Electric Corp | Dynamic reactorless high-frequency vapor lamp ballast |
US3611021A (en) * | 1970-04-06 | 1971-10-05 | North Electric Co | Control circuit for providing regulated current to lamp load |
US3662216A (en) * | 1970-06-18 | 1972-05-09 | Gen Electric | Alternating current power modulator with parallel lc circuit controlling the relative phase of voltage and current applied to switching means |
US3684919A (en) * | 1970-12-10 | 1972-08-15 | Berkey Colortran Mfg Inc | Dimmer circuit |
US3681654A (en) * | 1971-02-18 | 1972-08-01 | Wagner Electric Corp | Light-regulating power supply circuit for gaseous discharge lamp |
BE786136A (nl) * | 1971-07-13 | 1973-01-11 | Philips Nv | Inrichting voor het voeden van tenminste een gas- en/of dampontladingslamp |
US3719858A (en) * | 1971-08-02 | 1973-03-06 | Hunt Electronics Co | Overload protection system for a light dimmer unit |
US3890562A (en) * | 1972-11-13 | 1975-06-17 | Gen Electric | Regulated power supply utilizing a halfwave switch |
US3821601A (en) * | 1973-06-13 | 1974-06-28 | Westinghouse Electric Corp | Regulated dimmer for incandescent lamps |
US3879652A (en) * | 1973-08-13 | 1975-04-22 | Westinghouse Electric Corp | AC solid state power controller with minimized internal power supply requirements |
US3904922A (en) * | 1973-11-19 | 1975-09-09 | Xerox Corp | Lamp control and lamp switch circuit |
US3890537A (en) * | 1974-01-02 | 1975-06-17 | Gen Electric | Solid state chopper ballast for gaseous discharge lamps |
US3969652A (en) * | 1974-01-04 | 1976-07-13 | General Electric Company | Electronic ballast for gaseous discharge lamps |
US3885197A (en) * | 1974-02-01 | 1975-05-20 | Lear Siegler Inc | Light dimmer |
US3936726A (en) * | 1974-09-03 | 1976-02-03 | General Electric Company | Gating control for a static switching arrangement with improved dynamic response |
US3999100A (en) * | 1975-05-19 | 1976-12-21 | Morton B. Leskin | Lamp power supply using a switching regulator and commutator |
US4004188A (en) * | 1975-09-26 | 1977-01-18 | General Electric Company | Starting circuit for inverter operated gaseous discharge lamps |
US4042856A (en) * | 1975-10-28 | 1977-08-16 | General Electric Company | Chopper ballast for gaseous discharge lamps with auxiliary capacitor energy storage |
US4329627A (en) * | 1976-02-02 | 1982-05-11 | Esquire, Inc. | High frequency thyristor circuit for energizing a gaseous discharge lamp |
US4060752A (en) * | 1976-03-01 | 1977-11-29 | General Electric Company | Discharge lamp auxiliary circuit with dI/dt switching control |
JPS52119127A (en) * | 1976-03-30 | 1977-10-06 | Zuiia Asoshieiteizu Inc | Device for operating gas discharge lamp |
FR2345003A1 (fr) * | 1977-02-25 | 1977-10-14 | Gte Sylvania Inc | Circuit auto-oscillateur reglable |
US4200830A (en) * | 1977-08-10 | 1980-04-29 | Esb Incorporated | Series resonant battery charger and control therefor |
US4253046A (en) * | 1978-12-11 | 1981-02-24 | Datapower, Inc. | Variable intensity control apparatus for operating a gas discharge lamp |
US4238710A (en) * | 1978-12-27 | 1980-12-09 | Datapower, Inc. | Symmetry regulated high frequency ballast |
US4240009A (en) * | 1978-02-27 | 1980-12-16 | Paul Jon D | Electronic ballast |
US4277728A (en) * | 1978-05-08 | 1981-07-07 | Stevens Luminoptics | Power supply for a high intensity discharge or fluorescent lamp |
US4220896A (en) * | 1978-08-16 | 1980-09-02 | The United States Of America As Represented By The Secretary Of The Interior | High frequency lighting inverter with constant power ballast |
US4287468A (en) * | 1978-08-28 | 1981-09-01 | Robert Sherman | Dimmer control system |
US4210846A (en) * | 1978-12-05 | 1980-07-01 | Lutron Electronics Co., Inc. | Inverter circuit for energizing and dimming gas discharge lamps |
CH637251A5 (de) * | 1978-12-22 | 1983-07-15 | Contrinex Sa | Stromversorgungsanordnung zur speisung einer induktiven oder ohmisch-induktiven last. |
DE2909605A1 (de) * | 1979-03-12 | 1980-09-25 | Patra Patent Treuhand | Vorschaltanordnung zum betreiben einer entladungslampe |
US4251752A (en) * | 1979-05-07 | 1981-02-17 | Synergetics, Inc. | Solid state electronic ballast system for fluorescent lamps |
DE2922219C3 (de) * | 1979-05-31 | 1982-03-11 | Siemens AG, 1000 Berlin und 8000 München | Elektronischer Sensor-Ein/Aus-Schalter |
US4417181A (en) * | 1979-07-06 | 1983-11-22 | Sonelt Corporation | Electronic ballast |
US4259614A (en) * | 1979-07-20 | 1981-03-31 | Kohler Thomas P | Electronic ballast-inverter for multiple fluorescent lamps |
JPS5919639B2 (ja) * | 1979-09-28 | 1984-05-08 | 東芝ライテック株式会社 | 放電灯点灯装置 |
US4358716A (en) * | 1980-04-14 | 1982-11-09 | White Castle System, Inc. | Adjustable electrical power control for gas discharge lamps and the like |
US4356433A (en) * | 1980-07-07 | 1982-10-26 | The Nuarc Company, Inc. | HID Lamp power supply |
JPS6057674B2 (ja) * | 1980-09-26 | 1985-12-16 | 東芝ライテック株式会社 | 放電灯点灯装置 |
US4477748A (en) * | 1980-10-07 | 1984-10-16 | Thomas Industries, Inc. | Solid state ballast |
US4366570A (en) * | 1980-11-13 | 1982-12-28 | Candela Corporation | Series inverter for capacitor charging |
US4463286A (en) * | 1981-02-04 | 1984-07-31 | North American Philips Lighting Corporation | Lightweight electronic ballast for fluorescent lamps |
US4464606A (en) * | 1981-03-25 | 1984-08-07 | Armstrong World Industries, Inc. | Pulse width modulated dimming arrangement for fluorescent lamps |
US4388563A (en) * | 1981-05-26 | 1983-06-14 | Commodore Electronics, Ltd. | Solid-state fluorescent lamp ballast |
US4414493A (en) * | 1981-10-06 | 1983-11-08 | Thomas Industries Inc. | Light dimmer for solid state ballast |
DE3142613A1 (de) * | 1981-10-28 | 1983-05-05 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Schaltungsanordnung zum zuenden und betrieb einer niederdruckquecksilberdampfentladungslampe |
US4415839A (en) * | 1981-11-23 | 1983-11-15 | Lesea Ronald A | Electronic ballast for gaseous discharge lamps |
DE3149526A1 (de) * | 1981-12-14 | 1983-06-23 | Philips Patentverwaltung | Schaltungsanordnung zum betrieb von hochdruck-gasentladungslampen |
GB2117192B (en) * | 1982-02-26 | 1986-01-02 | Transtar Limited | Lamp control circuit |
US4435749A (en) * | 1982-02-26 | 1984-03-06 | Thomas Industries Inc. | High frequency inverter fault protection system |
US4441054A (en) * | 1982-04-12 | 1984-04-03 | Gte Products Corporation | Stabilized dimming circuit for lamp ballasts |
NL8201631A (nl) * | 1982-04-20 | 1983-11-16 | Philips Nv | Gelijkstroom-wisselstroomomzetter voor het ontsteken en met wisselstroom voeden van een gas- en/of dampontladingslamp. |
US4560908A (en) * | 1982-05-27 | 1985-12-24 | North American Philips Corporation | High-frequency oscillator-inverter ballast circuit for discharge lamps |
US4453109A (en) * | 1982-05-27 | 1984-06-05 | North American Philips Corporation | Magnetic transformer switch and combination thereof with a discharge lamp |
US4442382A (en) * | 1982-07-06 | 1984-04-10 | Chiu Technical Corporation | Constant power switching power supply |
US4484108A (en) * | 1982-08-02 | 1984-11-20 | North American Philips Corporation | High frequency ballast-ignition system for discharge lamps |
US4461980A (en) * | 1982-08-25 | 1984-07-24 | Nilssen Ole K | Protection circuit for series resonant electronic ballasts |
US4523131A (en) * | 1982-12-10 | 1985-06-11 | Honeywell Inc. | Dimmable electronic gas discharge lamp ballast |
US4498031A (en) * | 1983-01-03 | 1985-02-05 | North American Philips Corporation | Variable frequency current control device for discharge lamps |
US4585974A (en) * | 1983-01-03 | 1986-04-29 | North American Philips Corporation | Varible frequency current control device for discharge lamps |
DE3312575A1 (de) * | 1983-01-08 | 1984-07-12 | Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg | Elektronisches vorschaltgeraet fuer leuchtstofflampen |
US4506195A (en) * | 1983-02-04 | 1985-03-19 | North American Philips Lighting Corporation | Apparatus for operating HID lamp at high frequency with high power factor and for providing standby lighting |
US4591963A (en) * | 1984-04-23 | 1986-05-27 | At&T Bell Laboratories | Technique for reducing line current harmonics at input to power supply acting as nonlinear load |
US4682084A (en) * | 1985-08-28 | 1987-07-21 | Innovative Controls, Incorporated | High intensity discharge lamp self-adjusting ballast system sensitive to the radiant energy or heat of the lamp |
CA1327991C (en) * | 1986-03-28 | 1994-03-22 | Thomas E. Dean | High frequency ballast for gaseous discharge lamps |
-
1987
- 1987-10-08 US US07/106,180 patent/US4873471A/en not_active Expired - Fee Related
-
1988
- 1988-10-07 AT AT88309375T patent/ATE102781T1/de not_active IP Right Cessation
- 1988-10-07 EP EP88309375A patent/EP0311424B1/de not_active Expired - Lifetime
- 1988-10-07 DE DE3888278T patent/DE3888278T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0311424A2 (de) | 1989-04-12 |
ATE102781T1 (de) | 1994-03-15 |
EP0311424B1 (de) | 1994-03-09 |
EP0311424A3 (en) | 1989-10-18 |
DE3888278T2 (de) | 1994-09-29 |
US4873471A (en) | 1989-10-10 |
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Legal Events
Date | Code | Title | Description |
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8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |