EP0707438A2 - Ballast pour au moins une lampe à décharge - Google Patents

Ballast pour au moins une lampe à décharge Download PDF

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Publication number
EP0707438A2
EP0707438A2 EP95116198A EP95116198A EP0707438A2 EP 0707438 A2 EP0707438 A2 EP 0707438A2 EP 95116198 A EP95116198 A EP 95116198A EP 95116198 A EP95116198 A EP 95116198A EP 0707438 A2 EP0707438 A2 EP 0707438A2
Authority
EP
European Patent Office
Prior art keywords
heating
inverter
lamp
circuit
switch
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
EP95116198A
Other languages
German (de)
English (en)
Other versions
EP0707438A3 (fr
EP0707438B1 (fr
Inventor
Siegfried Luger
Thomas Marinelli
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.)
Tridonic Bauelemente GmbH
Original Assignee
Tridonic Bauelemente GmbH
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25941035&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0707438(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19501695A external-priority patent/DE19501695B4/de
Application filed by Tridonic Bauelemente GmbH filed Critical Tridonic Bauelemente GmbH
Publication of EP0707438A2 publication Critical patent/EP0707438A2/fr
Publication of EP0707438A3 publication Critical patent/EP0707438A3/fr
Application granted granted Critical
Publication of EP0707438B1 publication Critical patent/EP0707438B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05B41/36—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
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3925—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by frequency variation
    • 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
    • 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

Definitions

  • the invention relates to a ballast for at least one gas discharge lamp according to the preamble of claim 1, and a method for operating a gas discharge lamp with such a ballast.
  • the gas discharge lamp is generally operated on a series resonant circuit, the resonant circuit capacitor generally lying parallel to the discharge path of the gas discharge lamp.
  • the electrodes of the lamp are designed as heating coils through which the current of the resonant circuit flows when the lamp is not ignited.
  • the frequency is changed in relation to the resonance frequency of the resonance circuit in such a way that the voltage across the resonance capacitor and thus above the gas discharge lamp does not cause the gas discharge lamp to ignite. In this way, a substantially more constant current flows through the lamp electrodes designed as filaments, so that they are preheated.
  • the frequency is set in the vicinity of the resonance frequency of the resonance circuit, whereby the voltage across the resonance capacitor increases so that the gas discharge lamp ignites.
  • the invention is therefore based on the object of providing a ballast for at least one gas discharge lamp, so that reliable operation which is gentle on the lamp is always ensured.
  • an inverter which has two series switches connected to a DC voltage source and connected in push-pull mode, with a load circuit consisting of a series resonance circuit and the lamp and a heating circuit for the power supply to the inverter the lamp filament is connected.
  • the heating circuit also has a further controllable switch for controlling the heating current. Furthermore, the heating circuit is also connected in parallel to one of the two switches of the inverter.
  • the object is achieved according to claim 16 in that when the gas discharge lamp is preheated, the inverter is operated at the maximum clock frequency, while the clock for the additional controllable switch is selected such that the gas discharge lamp is operated with the maximum permissible heating power.
  • the series resonant circuit can operate unaffected and thus undamped. Furthermore, it is possible by means of the method according to the invention, depending on the Inverters determine the dimming level of the gas discharge lamp to set the required heating voltage. In addition, when using different lamps on one and the same ballast, it is possible to provide the heating power required for the lamp selected in each case without influencing the operating conditions of the lamp.
  • the further switch is switched so that the lamp is only supplied with heating current when it has to be heated due to its operating state. This means that only as much energy as is absolutely necessary for heating the lamp is used.
  • Claims 2-4 relate advantageously to configurations of the ballast according to the invention.
  • FIG. 1 shows the essential parts of an exemplary embodiment of a ballast for a gas discharge lamp.
  • This initially has an inverter, which consists of the controllable switches S1 and S2, which are controlled in a push-pull manner by means of an inverter control circuit 1. This means that one switch is switched on and the other is switched off.
  • the two inverter switches S1 and S2 are connected in series between a positive supply voltage and ground.
  • the load circuit is connected to the common node of the two inverter switches S1, S2.
  • This consists of a series resonance circuit, which is composed of a resonance circuit coil L1 and a resonance circuit capacitor C3.
  • the resonant circuit capacitor C3 has one terminal connected to ground.
  • the other connection of the coupling capacitor C2 is connected to one of two cathodes, a gas discharge lamp LA.
  • the two cathodes of the gas discharge lamp LA each have two connections, between each of which a heating coil is provided for heating the respective cathode.
  • the electrode of the gas discharge lamp LA which is not connected to the coupling capacitor C2 is connected to ground with a connection K3.
  • a heating transformer T which has two windings T1 and T3 on the primary side and two windings T2 and T4 on the secondary side.
  • the one winding T1 on the primary side is connected with its one connection to the connecting node of the two inverter switches S1 and S2 and with its second connection it is connected to the second winding T3 on the primary side.
  • This is again connected to a connection of a further controllable switch S3.
  • the second connection of the further controllable switch S3 is in turn connected to a resistor R1, which on the other hand is connected to ground. This results in a series connection of the two primary-side windings of the heating transformer, the further controllable switch S3 and the resistor R1, which are connected in parallel to the inverter switch S2.
  • the further controllable switch S3 is in turn operated by a switching controller 2 assigned to it.
  • the two windings T2 and T4 on the secondary side of the heating transformer T are connected in series with respective diodes D3 and D4 to one of the two electrodes of the gas discharge lamp LA.
  • the winding T2 is connected via the diode D3 to the heating coil connections K3 and K4 of the one electrode and the winding T4 is connected via the diode D4 to the heating coil connections K1 and K2 of the second electrode.
  • a diode D1 with its anode is connected to the connection node between the further switch S3 and the secondary winding T3, the cathode of which is connected to the positive supply voltage.
  • a diode D2 is connected in parallel to the inverter switch S2, the anode connection of which is connected to ground. This diode can be omitted when using FET transistors, provided that the transistors used have already integrated a diode circuit.
  • control signals for the inverter switch S1 are shown in curve I, which periodically change between levels L and H.
  • the period length is PO, the signal being at level H over the duration tO.
  • the inverter switch S1 is closed as long as it is driven with the H level.
  • the second inverter switch S2 switches, as already explained, alternating with the switch S1.
  • the lamp is dimmed, i.e. the more the period PO deviates from the resonance frequency of the series resonance circuit, the more the lamp is dimmed, i.e. the darker it is.
  • such an operation alone would have the consequence that the lamp would age to an increased extent.
  • control circuit 2 of the further controlled switch S3 is coupled to the inverter control circuit 1 via a coupling 3. According to FIG. 3, this is done in such a way that the further controllable switch S3 is only switched on when the inverter switch S1 is also switched on. is. This corresponds to the synchronization of the control signals according to curve I and the control signals for switch S3 according to curves II to VIII.
  • Curves I and II are identical, so that switches S1 and S3 switch in common mode and are simultaneously switched on and off. It follows from this that when the switch S1 is switched on, a primary-side current simultaneously flows through the windings T1 and T3 of the heating transformer T via the closed further controllable switch S3 and the resistor R1 from the positive supply voltage connection to ground. Since, according to curve II in FIG. 3, there is an interrupted current, ie no direct current, a voltage is induced with the same clock rate on the secondary side of the heating transformer, ie in the windings T2 and T4, according to the laws of magnetic induction.
  • the gas discharge lamp LA can ultimately be dimmed by changing the clock frequency of the inverter.
  • the cycle period can be reduced at the further switch S3 until it reaches a maximum heating power at the highest dimming level. This corresponds to curve II, in which, as already mentioned above, switches S3 and S1 operate in common mode.
  • Another alternative and also additionally applicable option for setting the heating power is to change the switching period in which the switch S3 is switched on. While in curves II to VII the switch S3 is switched on for as long as the switch S1, and only the time in which the switch S3 is switched off is varied, according to curve VIII the switch S3 is switched on significantly shorter. This also reduces the heating current that can be achieved by the heating coil.
  • curves 1 and 3 show the maximum and minimum heating current in recommended by the manufacturer of a gas discharge lamp Dependence on the degree of dimming is shown.
  • Curve 2 shows the heating current that can be achieved with the circuit and control method described above. It is thus clear from FIG. 4 that a heating current for the gas discharge lamp is easily adjustable, which is just above the minimally required heating current.
  • FIG. 5 shows a representation which shows the adjustable heating current as a function of the number of switch-on pulses omitted with respect to the switch S1, i.e. which represents a correspondingly extended period. If the number of missed switch-on pulses is 0 - as in II of Figure 2 - a maximum heating current can be achieved. This value can be reduced almost continuously.
  • FIG. 6 there is a maximum heating voltage, a maximum heating output being achievable with this voltage, as is also shown in FIG. 6.
  • a continuous change in the heating power can thus be set, as shown.
  • FIG. 3 a circuit variant of the heating transformer T is shown.
  • the circuit arrangements described above are initially purely a controller, in which the dependency between the switching frequency PO of the inverter and the switching frequency of the further controllable switch S3 is predetermined. Nevertheless, regulation is of course also conceivable.
  • the lamp current is measured in a manner known per se and supplied to the control circuits 1 and 2 (not shown).
  • a voltage proportional to the heating current can be measured at the resistor R1 and the value of the heating current via a heating current detector 4 as a signal Inverter control circuits are supplied. In this way, the heating current can be set directly as a function of the lamp current by means of regulation.
  • This arrangement also has the advantage that it is also possible to detect when there is a filament break, that is to say the lamp is defective and when the lamp has been removed from the arrangement. Through this detection via the heating current detector 4 and the forwarding of the information to the inverter control circuit 1, the lamp voltage can be reduced immediately by changing the inverter frequency. Likewise, a reinsertion of the lamp LA is detected, so that the inverter can be operated in such a way that the lamp LA automatically ignites after the insertion.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
EP95116198A 1994-10-13 1995-10-13 Ballast pour au moins une lampe à décharge Expired - Lifetime EP0707438B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4436705 1994-10-13
DE4436705 1994-10-13
DE19501695 1995-01-20
DE19501695A DE19501695B4 (de) 1994-10-13 1995-01-20 Vorschaltgerät für mindestens eine Gasentladungslampe mit vorheizbaren Lampenwendeln

Publications (3)

Publication Number Publication Date
EP0707438A2 true EP0707438A2 (fr) 1996-04-17
EP0707438A3 EP0707438A3 (fr) 1997-07-30
EP0707438B1 EP0707438B1 (fr) 1999-09-29

Family

ID=25941035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116198A Expired - Lifetime EP0707438B1 (fr) 1994-10-13 1995-10-13 Ballast pour au moins une lampe à décharge

Country Status (5)

Country Link
US (1) US5656891A (fr)
EP (1) EP0707438B1 (fr)
AT (1) ATE185231T1 (fr)
ES (1) ES2138129T3 (fr)
FI (1) FI113148B (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997016945A1 (fr) * 1995-11-02 1997-05-09 General Electric Company Alimentation en courant multifonction de chauffage de filament pour ballast electronique de lampes a intensite reglable a longue duree d'utilisation
EP0853445A1 (fr) * 1997-01-03 1998-07-15 Oy Helvar Ballast électronique réglable et équipé pour mesure la puissance de la lampe
WO2000069226A1 (fr) * 1999-05-06 2000-11-16 Koninklijke Philips Electronics N.V. Circuit
WO2000072640A1 (fr) * 1999-05-25 2000-11-30 Tridonic Bauelemente Gmbh Ballast electronique destine a au moins une lampe a decharge basse tension
WO2000072642A1 (fr) * 1999-05-25 2000-11-30 Tridonic Bauelemente Gmbh Ballast electronique destine a au moins une lampe a decharge basse tension
EP1519638A1 (fr) * 2003-09-29 2005-03-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Méthode pour commander une lampe à décharge basse pression
EP1316243B1 (fr) * 2000-08-31 2006-05-31 Koninklijke Philips Electronics N.V. Reconnaissance du type de lampe a decharge de gaz a partir des proprietes electriques integrees de la lampe
WO2007039010A1 (fr) * 2005-10-06 2007-04-12 Tridonicatco Gmbh & Co. Kg Chauffage de filament variable
EP1675442A3 (fr) * 2004-12-27 2007-12-19 Osram-Sylvania Inc. Ballast avec circuit de préchauffage des filaments
WO2011061053A1 (fr) * 2009-11-17 2011-05-26 Osram Gesellschaft mit beschränkter Haftung Ballast électronique et procédé pour faire fonctionner au moins une lampe à décharge
NL2007337C2 (nl) * 2011-09-02 2013-03-05 Nedap Nv Voorschakelapparaat voor een gasontladingslamp.
DE102007011646B4 (de) 2007-03-09 2019-03-21 Tridonic Gmbh & Co Kg Extern konfigurierbar integrierbare Steuerschaltung für Betriebsgeräte für Leuchtmittel

Families Citing this family (25)

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DE19520999A1 (de) * 1995-06-08 1996-12-12 Siemens Ag Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen
US5945788A (en) * 1998-03-30 1999-08-31 Motorola Inc. Electronic ballast with inverter control circuit
US5973455A (en) * 1998-05-15 1999-10-26 Energy Savings, Inc. Electronic ballast with filament cut-out
US6111369A (en) * 1998-12-18 2000-08-29 Clalight Israel Ltd. Electronic ballast
WO2000040056A1 (fr) * 1998-12-23 2000-07-06 United Automation Limited Unite de commande de magnetron a transformateur agissant sur l'appel de courant
FI108105B (fi) * 2000-09-20 2001-11-15 Helvar Oy Ab Loistelampun elektroninen liitäntälaite
DE10126011A1 (de) * 2001-05-28 2002-12-05 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Start einer Entladungslampe
US6501225B1 (en) 2001-08-06 2002-12-31 Osram Sylvania Inc. Ballast with efficient filament preheating and lamp fault protection
EP1477045B1 (fr) 2002-02-19 2013-09-18 Access Business Group International LLC Ensemble demarreur pour lampe a decharge gazeuse
DE10304544B4 (de) * 2003-02-04 2006-10-12 Hep Tech Co.Ltd. Elektronisches Vorschaltgerät
WO2005011340A1 (fr) * 2003-07-25 2005-02-03 Koninklijke Philips Electronics, N.V. Circuit de blocage de filaments
US7728528B2 (en) * 2004-11-29 2010-06-01 Century Concept Ltd Electronic ballast with preheating and dimming control
DE102005018795A1 (de) * 2005-04-22 2006-10-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektronisches Vorschaltgerät mit Blindstromschwingungsreduzierung
DE102005018761A1 (de) † 2005-04-22 2006-10-26 Tridonicatco Gmbh & Co. Kg Intelligente Flyback-Heizung
US7586268B2 (en) * 2005-12-09 2009-09-08 Lutron Electronics Co., Inc. Apparatus and method for controlling the filament voltage in an electronic dimming ballast
RU2346417C2 (ru) * 2007-03-05 2009-02-10 Владимир Авраамович Смолянский Устройство для зажигания и регулирования мощности люминесцентной лампы с подогревными катодами (варианты)
DE102007027179A1 (de) 2007-06-13 2008-12-18 Tridonicatco Gmbh & Co. Kg Steuerschaltung für Leuchtmittel-Betriebsgeräte
RU2446641C2 (ru) * 2008-01-23 2012-03-27 Мидас Вэй Трейдинг Ко., Лтд. Пьезоэлектрический резонансный контур зажигания лампы
US8232727B1 (en) 2009-03-05 2012-07-31 Universal Lighting Technologies, Inc. Ballast circuit for a gas-discharge lamp having a filament drive circuit with monostable control
ATE523948T1 (de) * 2009-04-07 2011-09-15 Osram Gmbh Wandlungsvorrichtung und entsprechendes wandlungsverfahren
DE102009019625B4 (de) * 2009-04-30 2014-05-15 Osram Gmbh Verfahren zum Ermitteln eines Typs einer Gasentladungslampe und elektronisches Vorschaltgerät zum Betreiben von mindestens zwei unterschiedlichen Typen von Gasentladungslampen
DE102011089113A1 (de) 2010-12-22 2012-06-28 Tridonic Gmbh & Co. Kg Verfahren und Betriebsgerät zum Betreiben einer Gasentladungslampe mit Heizwendel
US9084304B2 (en) * 2012-09-17 2015-07-14 Osram Sylvania Inc. Fault condition of detection circuit
US9414472B2 (en) 2012-09-28 2016-08-09 Lutron Electronics Co., Inc. Filament miswire protection in an electronic dimming ballast
US9232607B2 (en) 2012-10-23 2016-01-05 Lutron Electronics Co., Inc. Gas discharge lamp ballast with reconfigurable filament voltage

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EP0589081A1 (fr) 1992-09-24 1994-03-30 Knobel Ag Lichttechnische Komponenten Circuit pour alimenter une lampe fluorescente avec mesure du courant passant par la lampe
EP0594880A1 (fr) 1992-10-28 1994-05-04 Knobel Ag Lichttechnische Komponenten Procédé et circuit d'amorçage de lampes fluorescentes lorsque les électrodes de préchauffage ont atteint une température donnée

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DE4039161C2 (de) * 1990-12-07 2001-05-31 Zumtobel Ag Dornbirn System zur Steuerung der Helligkeit und des Betriebsverhaltens von Leuchtstofflampen
DE4140557A1 (de) * 1991-12-09 1993-06-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer oder mehrerer niederdruckentladungslampen
DE4219958C1 (en) * 1992-06-18 1993-06-24 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg, De Ballast circuit for discharge lamp - uses phase gate control to short out electrodes for interval in each half cycle, depending on brightness
DE19520999A1 (de) * 1995-06-08 1996-12-12 Siemens Ag Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen
DE29514817U1 (de) * 1995-09-15 1995-11-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Schaltungsanordnung zum Betrieb mindestens einer Niederdruckentladungslampe

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Publication number Priority date Publication date Assignee Title
EP0589081A1 (fr) 1992-09-24 1994-03-30 Knobel Ag Lichttechnische Komponenten Circuit pour alimenter une lampe fluorescente avec mesure du courant passant par la lampe
EP0594880A1 (fr) 1992-10-28 1994-05-04 Knobel Ag Lichttechnische Komponenten Procédé et circuit d'amorçage de lampes fluorescentes lorsque les électrodes de préchauffage ont atteint une température donnée

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997016945A1 (fr) * 1995-11-02 1997-05-09 General Electric Company Alimentation en courant multifonction de chauffage de filament pour ballast electronique de lampes a intensite reglable a longue duree d'utilisation
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
EP0877537A1 (fr) * 1995-11-02 1998-11-11 General Electric Company Ballast pour lampes dont on peut varier l'intensité lumineuse
EP0853445A1 (fr) * 1997-01-03 1998-07-15 Oy Helvar Ballast électronique réglable et équipé pour mesure la puissance de la lampe
WO2000069226A1 (fr) * 1999-05-06 2000-11-16 Koninklijke Philips Electronics N.V. Circuit
AU761360B2 (en) * 1999-05-25 2003-06-05 Tridonic Bauelemente Gmbh Electronic ballast for at least one low-pressure discharge lamp
WO2000072642A1 (fr) * 1999-05-25 2000-11-30 Tridonic Bauelemente Gmbh Ballast electronique destine a au moins une lampe a decharge basse tension
US6366031B2 (en) 1999-05-25 2002-04-02 Tridonic Bauelemente Gmbh Electronic ballast for at least one low-pressure discharge lamp
US6433490B2 (en) 1999-05-25 2002-08-13 Tridonic Bauelemente Gmbh Electronic ballast for at least one low-pressure discharge lamp
AU761194B2 (en) * 1999-05-25 2003-05-29 Tridonic Bauelemente Gmbh Electronic ballast for at least one low-pressure discharge lamp
WO2000072640A1 (fr) * 1999-05-25 2000-11-30 Tridonic Bauelemente Gmbh Ballast electronique destine a au moins une lampe a decharge basse tension
EP1316243B1 (fr) * 2000-08-31 2006-05-31 Koninklijke Philips Electronics N.V. Reconnaissance du type de lampe a decharge de gaz a partir des proprietes electriques integrees de la lampe
EP1519638A1 (fr) * 2003-09-29 2005-03-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Méthode pour commander une lampe à décharge basse pression
EP1675442A3 (fr) * 2004-12-27 2007-12-19 Osram-Sylvania Inc. Ballast avec circuit de préchauffage des filaments
WO2007039010A1 (fr) * 2005-10-06 2007-04-12 Tridonicatco Gmbh & Co. Kg Chauffage de filament variable
DE102007011646B4 (de) 2007-03-09 2019-03-21 Tridonic Gmbh & Co Kg Extern konfigurierbar integrierbare Steuerschaltung für Betriebsgeräte für Leuchtmittel
WO2011061053A1 (fr) * 2009-11-17 2011-05-26 Osram Gesellschaft mit beschränkter Haftung Ballast électronique et procédé pour faire fonctionner au moins une lampe à décharge
NL2007337C2 (nl) * 2011-09-02 2013-03-05 Nedap Nv Voorschakelapparaat voor een gasontladingslamp.
WO2013032337A1 (fr) * 2011-09-02 2013-03-07 N.V. Nederlandsche Apparatenfabriek Nedap Circuit d'alimentation pour lampe à décharge de gaz
US9363873B2 (en) 2011-09-02 2016-06-07 N.V. Nederlandsche Apparatenfabriek Nedap Power circuit for a gas discharge lamp

Also Published As

Publication number Publication date
FI954815A0 (fi) 1995-10-10
ES2138129T3 (es) 2000-01-01
EP0707438A3 (fr) 1997-07-30
EP0707438B1 (fr) 1999-09-29
FI113148B (fi) 2004-02-27
ATE185231T1 (de) 1999-10-15
US5656891A (en) 1997-08-12
FI954815L (fi) 1996-04-14

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