EP0239793B1 - Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen - Google Patents

Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen Download PDF

Info

Publication number
EP0239793B1
EP0239793B1 EP87102736A EP87102736A EP0239793B1 EP 0239793 B1 EP0239793 B1 EP 0239793B1 EP 87102736 A EP87102736 A EP 87102736A EP 87102736 A EP87102736 A EP 87102736A EP 0239793 B1 EP0239793 B1 EP 0239793B1
Authority
EP
European Patent Office
Prior art keywords
resistor
circuit
capacitor
pressure discharge
mains rectifier
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 - Lifetime
Application number
EP87102736A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0239793A1 (de
Inventor
Anton Zuchtriegel
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to AT87102736T priority Critical patent/ATE65009T1/de
Publication of EP0239793A1 publication Critical patent/EP0239793A1/de
Application granted granted Critical
Publication of EP0239793B1 publication Critical patent/EP0239793B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
    • H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp 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
    • 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

Definitions

  • Such a circuit arrangement is known from EP-A-146683.
  • a similar circuit arrangement without the switch-off and restarting device is in the book "Electronic Circuits" by Walter Hirschmann from SIEMENS AG. described.
  • the low-pressure discharge lamp or lamps can be connected both between the positive pole of the mains rectifier and the center tap between the two transistors or between the latter and the negative pole of the mains rectifier.
  • the low-pressure discharge lamp is connected in parallel with the center tap between the two transistors and the negative pole of the mains rectifier, as will be explained in more detail below.
  • DE-OS 32 20 301 also lists a converter with a switch-off device, in particular for operating discharge lamps with heatable electrodes.
  • a thyristor is also provided as the switching element for the switch-off device, but here it connects the heating circuit of the lamp with the negative pole of the mains rectifier.
  • the thyristor receives its holding current via the electrode of the lamp adjacent to the charging capacitor, a shutdown winding of the saturation transformer via diodes and the starting capacitor being connected in parallel via a resistor.
  • this switch-off device it is not necessary to switch off the mains AC voltage after replacing the lamp in order to start the converter again.
  • the holding current is also withdrawn from the thyristor, whereupon it returns to the blocking state.
  • the aim of the invention is to provide a reclosing device for a circuit arrangement with a push-pull frequency generator and a shutdown device, as set out in the preamble of the main claim. After the defective low-pressure discharge lamp has been replaced, the reclosing device should enable the generator to start up immediately and thus allow the lamp to ignite quickly and operate accordingly without the AC mains voltage having to be briefly interrupted for this purpose.
  • the circuit arrangement for high-frequency operation of one or more parallel-connected low-pressure discharge lamps with the features mentioned in the preamble of the main claim is characterized in that the reclosing device consists of a capacitor and a resistor, the capacitor being the connection of the electrodes on the heating circuit side, the other connection is led directly to the negative pole of the mains rectifier, connects to the center tap between the diode and the resistor of the switch-off device and the resistor connects the center tap between the capacitor and the connection of the electrodes on the heating circuit side to the positive pole of the mains rectifier.
  • the trigger circuit of the thyristor switches the thyristor through. This removes the control power from the base of the transistor to which the anode of the thyristor is connected. The transistor is blocked and the oscillation of the push-pull frequency generator ends.
  • the diode in the anode circuit is used to block the AC voltage and the resistor to limit the current.
  • the one at the center tap between the diode and the resistor of the thyristor anode circuit connected capacitor charged via the associated resistor, which connects the center tap between the capacitor and the electrode connection to the positive pole of the mains rectifier, the capacitor voltage reaching the device DC voltage after a short time.
  • the electrode filament connects the respective capacitor with its positively charged surface to the thyristor cathode, which is connected to the negative pole of the mains rectifier. This initiates a charge reversal of the capacitor, which removes the holding current from the connected thyristor. As a result, the thyristor goes into the blocking state and thus enables the oscillation circuit to start the oscillation of the frequency generator again.
  • the reclosing device It is essential for the reclosing device to function that, in the circuit arrangement, the lamp or lamps are electrically connected to the arrangement in such a way that an electrode of the lamps is connected directly to the negative pole of the mains rectifier and not to the positive pole, as was previously usually the case. Only then is it possible to charge the capacitor with the holding current interrupted at the thyristor.
  • a further resistor can be connected between the center tap between the diode and the resistance of the shutdown device and the respective electrode connection located on the heating circuit side. This extends the recharging process on the capacitor and the interruption of the holding current at the thyristor. The certainty that the thyristor at everyone Holding current interruption in the blocking state is increased where further.
  • a single resistor is sufficient, provided that it lies before the individual leads are disconnected from the respective electrode connections. Otherwise, a separate resistor must be installed in each supply line.
  • the block diagram in FIG. 1 shows the basic structure of the circuit arrangement according to the invention for a low-pressure discharge lamp.
  • the circuit arrangement includes a harmonic filter 1, a line rectifier 2 and a push-pull frequency generator with a control circuit 3, the series-connected polarized switching transistors bridge the DC output of the line rectifier 2 over. Between the center tap of the switching transistors and the negative pole of the mains rectifier 2 is connected via a series resonant circuit 4 to the low-pressure discharge lamp LP1.
  • the shutdown device consists of a series connection of a diode D10, a resistor R11 and a thyristor TH with a trigger circuit 5, this series connection connecting the base input of the switching transistor connected to the positive pole of the mains rectifier 2 to the negative pole of the mains rectifier 2.
  • the center tap M2 is connected between the diode D10 and the resistor R11 via a resistor R1 to the positive pole of the mains rectifier 2.
  • the reclosing device is composed of a capacitor C9 and a resistor R12.
  • the capacitor C9 connects the center tap M2 between the diode D10 and the resistor R11 to the connection of the electrode on the heating circuit side, the other connection of which leads to the negative pole of the mains rectifier 2.
  • the resistor R12 connects the positive pole of the mains rectifier 2 to the center tap M3 between the capacitor C9 and the electrode connection on the heating circuit side.
  • a further resistor R14 can be provided between the center tap M2 and the capacitor C9.
  • FIG. 2 shows the exact circuit diagram of a circuit arrangement according to the invention with a switch-off and restart device for a low-pressure discharge lamp.
  • An iron choke L1 is connected in series as a harmonic filter as well as a capacitor C1 in parallel to the rectifier input.
  • the line rectifier follows the harmonic filter with the diodes D1 to D4 and parallel to the DC output a smoothing capacitor C2.
  • the self-regulating push-pull frequency generator consists of the two transistors T1, T2 with the reverse current diodes D6, D7, the series resistors R3 to R6, the control transformer, the starting generator with the resistors R2, R7, the start capacitor C3 and the diac DK1 and the capacitor C13 for regulating the Slope.
  • the control transformer consists of the primary winding L2.1 and the two secondary windings L2.2 and L2.3.
  • the lamp LP1 is connected to a terminal A2 of the electrode E1 with the center tap M1 between the two transistors T1, T2 and to the terminal A4 of the other electrode E2 with the negative pole of the mains rectifier.
  • a series resonance circuit of resonance inductor L3.1, resonance capacitor C5 and coupling capacitor C4 is provided, the resonance inductor L3.1 and the coupling capacitor C4 between the primary winding L2.1 of the control transformer and the connection A2 of the electrode E1 and the resonance capacitor C5 between those on the Connections A1 and A3 of electrodes E1 and E2 on the heating circuit side are connected.
  • the circuit arrangement has a shutdown device, which consists of a series connection a diode D10 of a resistor R11 and a thyristor TH with a trigger circuit.
  • the series circuit connects the base of the transistor T1 of the push-pull frequency generator connected to the positive pole of the mains rectifier with the minus pole of the mains rectifier.
  • the center tap M2 is connected between the diode D10 and the resistor R11 via a resistor R1 to the positive pole of the mains rectifier.
  • the trigger circuit for the thyristor consists of the secondary winding L3.2, the diac DK2, the capacitors C6 to C8 and the resistors R8 to R10. The structure and mode of operation of such a trigger circuit is described in more detail in DE-OS 29 41 822 and is not to be explained here any longer since it is not important for the inventive concept.
  • the reclosing device consists of a further capacitor C9 and a resistor R12.
  • the capacitor C9 connects the center tap M2 between the diode D10 and the resistor R11 to the connection A3 on the heating circuit side of the electrode E2.
  • the resistor R12 leads the DC voltage of the mains rectifier to the center tap M3 between the capacitor C9 and the electrode connection A3.
  • the low pressure discharge lamp LP1 fails, e.g. by pulling the air or due to used emitter material, a voltage increase occurs in the resonance inductance L3.1 due to the free resonance case.
  • the breakdown voltage is reached on the diac DK2 after a time specified by the RC element R9, C7 and the thyristor TH is thus switched through. This switching process removes the control energy from the base of the transistor T1 by dissipation to the negative pole of the mains rectifier and ends the oscillation of the push-pull frequency generator.
  • the thyristor TH is supplied with the necessary direct current via the resistor R1 so that it remains in the conductive state.
  • the capacitor C9 After removing the defective low-pressure discharge lamp LP1, the capacitor C9 is charged to the device DC voltage via the resistor R12 within a few seconds. After using a new low-pressure discharge lamp, the positively charged area of the capacitor C9 is connected to the negative pole via the electrode E2. This results in a charge reversal of the capacitor C9, the thyristor TH changing to the blocking state within less than 0.1 ms, depending on the time constant defined by the capacitor C9 and the resistor R11. By adding the resistor R14, the recharging time can be lengthened and the security for the transition of the thyristor TH into the blocking state can be further increased.
  • FIG. 3 shows the exact circuit diagram of a circuit arrangement according to the invention with shutdown and Reactivation device for the parallel connection of two low-pressure discharge lamps.
  • the circuit diagram essentially corresponds to the circuit diagram shown in FIG. 2 for a low-pressure discharge lamp.
  • a second lamp LP2 with electrodes E3 and E4 is connected in parallel to the first low-pressure discharge lamp LP1.
  • a second series resonance circuit consisting of resonance inductor L4.1, coupling capacitor C10 and resonance capacitor C11 is provided, the series circuit comprising coupling capacitor C10 and resonance inductor L4.1 between electrode connection A6 and primary control winding L2.1 and resonance capacitor C11 between the two on the Connections A5, A7 of electrodes E3 and E4 are connected on the heating circuit side.
  • the connection A8 is led directly to the negative pole of the mains rectifier.
  • the trigger circuit has a second secondary winding L4.2 in series with a diode D9, both parallel to the first secondary winding L3.2 with diode D8.
  • a further reclosure device consisting of capacitor C12 and resistor R13 is provided, the capacitor C12 being connected between the center tap M2 of the shutdown device and the connection A7 on the heating circuit side of the electrode E4 and the resistor R13 being the positive pole of the mains rectifier with the Center tap M4 connects between the capacitor C12 and the electrode terminal A7.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Toys (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Measurement Of Radiation (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
EP87102736A 1986-03-14 1987-02-26 Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen Expired - Lifetime EP0239793B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102736T ATE65009T1 (de) 1986-03-14 1987-02-26 Schaltungsanordnung zum betrieb von niederdruckentladungslampen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3608615 1986-03-14
DE19863608615 DE3608615A1 (de) 1986-03-14 1986-03-14 Schaltungsanordnung zum betrieb von niederdruckentladungslampen

Publications (2)

Publication Number Publication Date
EP0239793A1 EP0239793A1 (de) 1987-10-07
EP0239793B1 true EP0239793B1 (de) 1991-07-03

Family

ID=6296402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102736A Expired - Lifetime EP0239793B1 (de) 1986-03-14 1987-02-26 Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen

Country Status (7)

Country Link
US (1) US4710682A (fi)
EP (1) EP0239793B1 (fi)
AT (1) ATE65009T1 (fi)
DE (2) DE3608615A1 (fi)
FI (1) FI870901A (fi)
SU (1) SU1574187A3 (fi)
ZA (1) ZA871394B (fi)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19715341C1 (de) * 1997-04-12 1998-10-15 Vossloh Schwabe Gmbh Elektronisches Vorschaltgerät mit automatischem Wiederanlauf
DE19715342C1 (de) * 1997-04-12 1998-12-17 Vossloh Schwabe Gmbh Vorschaltgerät für unabhängigen Parallelbetrieb von Niederdruck-Gasentladungslampen

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3623749A1 (de) * 1986-07-14 1988-01-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb von niederdruckentladungslampen
GB2211038A (en) * 1987-10-14 1989-06-21 Sum Wing Lau Protective electronic ballast circuit for fluorescent lamps
DE3743422A1 (de) * 1987-12-21 1989-06-29 Zumtobel Ag Schaltungsanordnung zum betreiben einer oder mehrerer niederdruckentladungslampen
DE3805510A1 (de) * 1988-02-22 1989-08-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer niederdruckentladungslampe
US4945278A (en) * 1988-09-20 1990-07-31 Loong-Tun Chang Fluorescent tube power supply
DE3841227A1 (de) * 1988-12-07 1990-06-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer niederdruckentladungslampe
NL8803016A (nl) * 1988-12-08 1990-07-02 Maars Produktie B V Voedingsketen voor een gasontladingslamp.
DE68921620D1 (de) * 1989-01-30 1995-04-13 Flotronic Technology Pte Ltd Monolithischer, elektronischer ballast.
US5170099A (en) * 1989-03-28 1992-12-08 Matsushita Electric Works, Ltd. Discharge lamp lighting device
DE69017940T2 (de) * 1989-04-28 1995-11-16 Philips Electronics Nv Wechselrichter zum Speisen zweier Gas und / oder Dampfentladungslampen.
US5089753A (en) * 1990-07-09 1992-02-18 North American Philips Corporation Arrangement for predicting failure in fluorescent lamp systems
JPH0521182A (ja) * 1990-12-30 1993-01-29 Toshiba Lighting & Technol Corp 放電灯点灯装置および照明器具
US5130611A (en) * 1991-01-16 1992-07-14 Intent Patents A.G. Universal electronic ballast system
US5111114A (en) * 1991-06-18 1992-05-05 L.P.S. Technology Co., Ltd. Fluorescent lamp light ballast system
DE4120269C2 (de) * 1991-06-19 1995-12-07 Siemens Ag Wechselrichter zum Zünden und Betreiben einer Entladungslampe mit heizbaren Elektroden
DE4129430A1 (de) * 1991-09-04 1993-03-11 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer lampe
DE4136486A1 (de) * 1991-11-06 1993-05-13 Hella Kg Hueck & Co Vorschaltgeraet zum starten und betreiben von wechselstrom-hochdruck-gasentladungslampen
DE59207186D1 (de) * 1992-03-02 1996-10-24 Siemens Ag Schaltungsanordnung zum Betreiben mehrerer Leuchtstofflampen mit einem Vorschaltgerät
DE4210367A1 (de) * 1992-03-30 1993-10-07 Abb Patent Gmbh Elektronisches Vorschaltgerät
DE4210373A1 (de) * 1992-03-30 1993-10-07 Abb Patent Gmbh Elektronisches Vorschaltgerät
US5436529A (en) * 1993-02-01 1995-07-25 Bobel; Andrzej A. Control and protection circuit for electronic ballast
EP0637118B1 (de) * 1993-07-27 1997-03-12 Knobel Ag Lichttechnische Komponenten Schaltungsanordnung zur Begrenzung des Einschaltstromes und der Ueberspannung eines elektronischen Vorschaltgerätes
DE9318071U1 (de) * 1993-11-25 1995-03-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Schaltungsanordnung zum Betrieb einer Niederdruckentladungslampe an einer Niedervolt-Spannungsquelle
US5394062A (en) * 1993-12-15 1995-02-28 General Electric Company Lamp ballast circuit with overload detection and ballast operability indication features
DE4410492A1 (de) * 1994-03-25 1995-09-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen
US5777867A (en) * 1995-09-14 1998-07-07 Suitomo Electric Industries, Ltd. Electric discharge method and apparatus
US6366032B1 (en) 2000-01-28 2002-04-02 Robertson Worldwide, Inc. Fluorescent lamp ballast with integrated circuit
DE10046443A1 (de) * 2000-09-18 2002-03-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Elektronische Schaltung zur Detektion des Wandelbruchs bei Gasentladungslampen
US8018173B2 (en) * 2006-09-03 2011-09-13 Fulham Company Ltd. Ballasts for fluorescent lamps

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941822A1 (de) * 1979-10-16 1981-04-30 Patra Patent Treuhand Vorschaltanordnung zum betreiben von niederdruckentladungslampen
US4346332A (en) * 1980-08-14 1982-08-24 General Electric Company Frequency shift inverter for variable power control
US4477748A (en) * 1980-10-07 1984-10-16 Thomas Industries, Inc. Solid state ballast
EP0146683B1 (de) * 1981-07-31 1987-11-19 Siemens Aktiengesellschaft Wechselrichter
US4481460A (en) * 1982-02-08 1984-11-06 Siemens Aktiengesellschaft Inverter with charging regulator having a variable keying ratio

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19715341C1 (de) * 1997-04-12 1998-10-15 Vossloh Schwabe Gmbh Elektronisches Vorschaltgerät mit automatischem Wiederanlauf
DE19715342C1 (de) * 1997-04-12 1998-12-17 Vossloh Schwabe Gmbh Vorschaltgerät für unabhängigen Parallelbetrieb von Niederdruck-Gasentladungslampen

Also Published As

Publication number Publication date
ZA871394B (en) 1987-09-30
SU1574187A3 (ru) 1990-06-23
US4710682A (en) 1987-12-01
EP0239793A1 (de) 1987-10-07
DE3771099D1 (de) 1991-08-08
FI870901A0 (fi) 1987-03-02
FI870901A (fi) 1987-09-15
DE3608615A1 (de) 1987-09-17
ATE65009T1 (de) 1991-07-15

Similar Documents

Publication Publication Date Title
EP0239793B1 (de) Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen
EP0679046B1 (de) Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen
DE2941822C2 (fi)
EP0062275B1 (de) Vorschaltanordnung zum Betreiben von Niederdruckentladungslampen
EP0330118A2 (de) Schaltungsanordnung zum Betrieb einer Niederdruckentladungslampe
DE69019648T2 (de) Gerät zur Versorgung einer Leuchtstofflampe.
EP0264765B1 (de) Schaltungsanordnung zum Betrieb von Niedervolt-Halogenglühlampen
EP0616752B1 (de) Schaltungsanordnung zum betrieb einer oder mehrerer niederdruckentladungslampen
EP0372303B1 (de) Schaltungsanordnung zum Betrieb einer Niederdruckentladungslampe
EP0693864B1 (de) Schaltungsanordnung zum Betrieb einer oder mehrerer Niederdruckentladungslampen
EP0062276B1 (de) Vorschaltanordnung zum Betreiben von Niederdruckentladungslampen
EP0753987B1 (de) Schaltungansordnung zum Betrieb elektrischer Lampen und Betriebsverfahren für elektrische Lampen
EP0655880A1 (de) Schaltungsanordnung zum Betrieb einer Niderdruckentladungslampe an einer Niedervolt-Spannungsquelle
EP0699016A2 (de) Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen
EP0541909B1 (de) Schaltungsanordnung zum Betrieb von Entladungslampen
EP0691800A2 (de) Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen
EP0276460B1 (de) Schaltungsanordnung zum Betrieb einer Niederdruckentladungslampe
EP1028606B1 (de) Schaltungsanordnung zum Betrieb mindestens einer Niederdruckentladungslampe
EP0648068B1 (de) Schaltungsanordnung zum Betrieb elektrischer Lampen
EP0697803A2 (de) Schaltungsanordnung zur Ansteuerung von Gasentladungslampen
EP0050131B1 (de) Vorschaltgerät für eine entladungslampe
EP0707436B1 (de) Schaltungsanordnung zum Betreiben von Glühlampen
DE3408426A1 (de) Schaltungsanordnung zum wechselstrombetrieb von hochdruck-gasentladungslampen
DE3835121A1 (de) Schaltungsanordnung zum betrieb einer niederdruckentladungslampe
DE69313257T2 (de) Schaltung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE FR GB IT LI SE

17P Request for examination filed

Effective date: 19871106

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PATENT-TREUHAND-GESELLSCHAFT FUER ELEKTRISCHE GLUE

17Q First examination report despatched

Effective date: 19900903

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19910703

Ref country code: GB

Effective date: 19910703

Ref country code: SE

Effective date: 19910703

REF Corresponds to:

Ref document number: 65009

Country of ref document: AT

Date of ref document: 19910715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3771099

Country of ref document: DE

Date of ref document: 19910808

EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19911122

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19920226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19920229

Ref country code: LI

Effective date: 19920229

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19921103

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST