WO2004054327A1 - Montage electrique pour allumer une lampe a decharge et procede pour allumer la lampe a decharge - Google Patents

Montage electrique pour allumer une lampe a decharge et procede pour allumer la lampe a decharge Download PDF

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Publication number
WO2004054327A1
WO2004054327A1 PCT/EP2003/012862 EP0312862W WO2004054327A1 WO 2004054327 A1 WO2004054327 A1 WO 2004054327A1 EP 0312862 W EP0312862 W EP 0312862W WO 2004054327 A1 WO2004054327 A1 WO 2004054327A1
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WO
WIPO (PCT)
Prior art keywords
primary
inductance
discharge lamp
capacitance
connection
Prior art date
Application number
PCT/EP2003/012862
Other languages
German (de)
English (en)
Inventor
Dietmar Czekay
Martin Honsberg-Riedl
Johann Otto
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU2003288093A priority Critical patent/AU2003288093A1/en
Publication of WO2004054327A1 publication Critical patent/WO2004054327A1/fr

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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
    • H05B41/26—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
    • H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2881—Load circuits; Control thereof
    • 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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices
    • 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

Definitions

  • the invention relates to an electrical circuit for igniting at least one discharge lamp by applying at least one voltage pulse to an electrode of the discharge lamp.
  • an electrical circuit is implemented, for example, in a so-called electronic ballast (EVG).
  • EDG electronic ballast
  • An electronic ballast converts electrical energy from an available mains voltage in such a way that the discharge lamp can be operated in its optimal voltage, current and frequency range.
  • a method for igniting a discharge lamp by applying at least one voltage pulse to an electrode of the discharge lamp is also specified.
  • the discharge lamp is a high pressure gas discharge lamp.
  • the discharge lamp is operated with a sinusoidal alternating current (operating current).
  • a frequency (operating frequency) of the alternating current is, for example, 50 Hz.
  • the discharge lamp is controlled via the electrical circuit with a corresponding sinusoidal alternating voltage (initial voltage) of, for example, 115 V (frequency 50 Hz).
  • the initial voltage is with
  • Voltage pulses from 2,500 V to 10,000 V are superimposed.
  • the voltage pulses are generated inductively using a transformer.
  • the duration of a voltage pulse is at least one ⁇ s.
  • the voltage pulses are synchronized with the voltage maxima and minima of the sinusoidal initial voltage. Just the voltage maxima and minima are each superimposed with a voltage pulse. This means that a maximum of two voltage pulses occur per period of the initial voltage. After the discharge lamp has been ignited, the electrical circuit is changed such that no further voltage pulses are generated.
  • a gas of the discharge lamp is ionized by the ignition.
  • An electrically conductive plasma is created. This plasma causes the discharge lamp to light up.
  • the discharge lamp is driven with the operating current in order to maintain its lighting.
  • Today's electronic ballasts have a sinusoidal alternating current at their output with a frequency of approximately 50 kHz. This leads to the emission of electromagnetic radiation via the supply line to the discharge lamp. In order to reduce the exposure of an environment to this radiation, it is desirable not to operate the discharge lamp with a sinusoidal alternating current, but with a rectangular alternating current of low frequency. With such an alternating current, a brief (broadband) emission of electromagnetic radiation only occurs when the current is switched (change in the direction of current).
  • the object of the present invention is to show how a discharge lamp can be ignited which is operated with a rectangular alternating current.
  • an electrical circuit for igniting at least one discharge lamp by applying at least one voltage pulse to an electrode of the Discharge lamp specified characterized in that the circuit is designed such that for igniting the discharge lamp at least two chronologically successive voltage pulses with a pulse interval selected from the range from 2.5 ns to 5 ⁇ s inclusive can be generated.
  • a method for igniting a discharge lamp by applying at least one voltage pulse to an electrode of the discharge lamp is also specified.
  • the method is characterized in that at least two temporally successive voltage pulses with a pulse interval selected from the range of 2.5 ns to 5 ⁇ s inclusive are generated, which are passed on to the electrode of the discharge lamp.
  • the discharge lamp can be a high-pressure gas discharge lamp.
  • the discharge lamp is preferably a low-pressure gas discharge lamp.
  • an initial voltage is applied to the discharge lamp.
  • the initial voltage is applied to the electrode (lamp electrode or lamp counter electrode) of the discharge lamp.
  • the initial voltage can be a pulsating or smoothed DC voltage.
  • the initial voltage can be a pulsating or smoothed DC voltage.
  • Initial voltage is a rectangular AC voltage.
  • An amplitude of this AC voltage is, for example, 230 V.
  • a frequency (switching frequency) of the rectangular AC voltage is, for example, 130 Hz.
  • the initial voltage can be the operating voltage of the
  • Discharge lamp It is also conceivable that the initial voltage is different from the operating voltage.
  • the initial voltage is superimposed with several voltage pulses, which leads to the formation of the electrically conductive plasma in the discharge lamp.
  • a voltage pulse is a one-time surge.
  • the surge of tension emerges by its shape, its amplitude and its duration.
  • the voltage pulses with which the initial voltage is superimposed can have any shape (Gaussian, rectangular, ).
  • the amplitude of the voltage pulse is, for example, 600 V with a half-value width of, for example, 50 ns.
  • the pulse interval between two subsequent voltage pulses results, for example, from the time delay in the occurrence of voltage maxima and / or minima of the voltage pulses. It is also conceivable to delay the time of the greatest increase (decrease) in the voltage (maxima of the 1st derivative after the time).
  • the discharge lamp is ignited on the basis of the present invention with the aid of a high-frequency voltage pulse (packet of a large number of voltage pulses).
  • a high-frequency voltage pulse packet of a large number of voltage pulses.
  • the amplitude of a voltage pulse is preferably below 1000 V.
  • voltage pulses are preferably generated with a repetition frequency which is selected from the range from 100 kHz up to and including 200 MHz.
  • the voltage pulses can form a high-frequency pulsating DC voltage, the
  • Voltages of successive voltage pulses have the same sign.
  • a high-frequency alternating voltage is conceivable, in which the voltages of voltage pulses which follow one another in time have a different sign.
  • the duration of the individual voltage pulses is very short.
  • the voltage pulses have a half-value width selected from the range from 1.25 ns to 2.5 ⁇ s inclusive.
  • the initial voltage of the discharge lamp behaves as a direct voltage in relation to the voltage pulses even in the case of the rectangular AC voltage (switching frequency from 0.1 Hz to 1 kHz).
  • Circuit on at least one primary resonant circuit, at least one secondary resonant circuit and at least one inductive coupling element The primary resonant circuit and the secondary resonant circuit are coupled to one another via the inductive coupling element for inductively generating the voltage pulses in the secondary resonant circuit.
  • the secondary resonant circuit and the discharge lamp are electrically conductively connected to one another in order to forward the voltage pulses to the lamp electrode of the discharge lamp. With the help of the primary resonant circuit, the secondary
  • the primary resonant circuit can therefore be regarded as an excitation resonant circuit.
  • the secondary resonant circuit is connected to a load circuit of the discharge lamp.
  • the primary resonant circuit and the secondary resonant circuit are preferably electrically isolated. This means that no direct current can flow between the two resonant circuits 10 and 20.
  • the voltage pulses in the secondary resonant circuit are generated inductively alone.
  • the inductive coupling element in a special embodiment has at least one transformer with at least one primary inductance and at least one secondary inductance.
  • the primary inductance is a component of the primary resonant circuit and the secondary inductance is a component of the secondary resonant circuit.
  • the primary inductance is a primary winding and the Secondary inductance a secondary winding of the transformer. The primary winding and the secondary winding are coupled to one another via a magnetic circuit.
  • the coupling factor is a measure of the efficiency of the coupling.
  • the coupling factor between the primary inductance and the secondary inductance is a maximum of 1.0. This can apply to the transformer used. Surprisingly, however, it has been shown that it is advantageous with respect to the present invention if the coupling factor is less than 1.0.
  • the coupling factor between the primary inductance and the secondary inductance of the transformer is preferably selected from the range from 0.5 to 1.0 inclusive, in particular from the range from 0.85 to 0.95 inclusive.
  • the transformer is a step-down transformer in which an inductance of the primary inductance is higher than an inductance of the secondary inductance. As a result, the voltage is reduced and the current is increased. A minor one
  • Inductance of the secondary inductance is realized, for example, with a low number of turns in the secondary winding.
  • the inductance of the secondary inductance is preferably selected from the range from 0.3 ⁇ H to 100 ⁇ H inclusive.
  • the transformer is a high-frequency high-voltage (HF-HV) transformer.
  • HF-HV high-frequency high-voltage
  • the magnetic circuit is deliberately interrupted by several gaps in a core of the transformer. This enables the transformer to be operated even with a small size at a repetition frequency of up to 200 MHz and a voltage of up to 2,000 V.
  • This transformer is particularly suitable for generating the voltage pulses from the primary resonant circuit in the secondary resonant circuit.
  • the transformer is characterized by a high power throughput. A high quality and thus a low loss of the transformer can also be realized.
  • the small size of the HF-HV transformer is particularly advantageous.
  • the core of the HF-HV transformer is, for example, an RM6 ferrite core with a volume of approximately 15 mm ⁇ 15 mm ⁇ 12.5 mm. As a result, the entire electrical circuit can be implemented in a space-saving manner.
  • the electrical circuit has a primary resonant circuit, having a primary input connection for applying a primary input potential, a primary reference potential connection for applying a primary reference potential, one
  • Primary inductance connection of the primary inductance and the primary capacitance electrode of the primary capacitance have a common node
  • the further primary inductance connection of the primary inductance and the primary capacitance counterelectrode of the primary capacitance have and a common node
  • High-frequency switch is available for establishing and / or interrupting an electrically conductive connection between the primary reference potential connection and the node of the primary capacitance counterelectrode of the primary capacitance and the further primary inductance connection of the primary inductance.
  • the primary input potential can be positive or negative with respect to the primary reference potential.
  • the reference potential can be the earth potential. However, any reference potential is also conceivable.
  • the high-frequency switch has, for example, an IGBT or a high-frequency bipolar transistor.
  • the high-frequency switch has at least one MOS transistor.
  • the MOS transistor is a CoolMOS® transistor. These transistors are suitable for high frequency applications.
  • the high-frequency switch has a switching frequency selected from the range from 100 KHz to 200 MHz inclusive. The switching frequency is approximately 2.7 MHz, for example.
  • a duty cycle (duration of the contact established between the primary reference potential connection and the node of the primary capacitance counterelectrode of the primary capacitance and the further primary inductance connection of the primary inductance) is, for example, approximately 70 ns.
  • Duty cycle is variable.
  • the ignition voltage amplitude of the voltage pulses
  • the switch-on time can be varied via the switch-on time.
  • the high-frequency switch is embodied by a switching transistor. With suitable matching of the primary capacitance, the primary inductance, the switching frequency and the duty cycle of the high-frequency switch, a significant switching relief of the switching transistor can be achieved.
  • a switch-on voltage of the switching transistor can be up to
  • the electrical circuit has a secondary resonant circuit, having a secondary input connection for applying a secondary input potential, and a secondary reference potential connection for applying a secondary one Reference potential, the secondary inductance of the transformer with a secondary inductance connection and a further secondary inductance connection, at least one secondary capacitance with a secondary capacitance electrode and a secondary capacitance counterelectrode, at least one further secondary capacitance with a further secondary capacitance electrode and a further secondary capacitance counterelectrode, the secondary connection and the secondary capacitance of the discharge lamp have a common node, the secondary input connection, the further secondary capacitance electrode of the secondary capacitance and the further secondary inductance connection of the secondary inductance have a common node and the secondary capacitance counterelectrode of the secondary capacitance, the further secondary capacitance counterelectrode of the further secondary kapa zity, the secondary reference potential connection and a lamp counter electrode of the discharge lamp have a common node.
  • the secondary input potential can be positive or negative with respect to the secondary reference potential.
  • the secondary reference potential can be the earth potential.
  • any reference potential is also conceivable.
  • the secondary and the primary reference potential are identical.
  • the two reference potential connections are connected to one another in an electrically conductive manner.
  • the secondary capacity can be referred to as ignition capacity due to its function.
  • the voltages of the voltage pulses for igniting the discharge lamp run up at this capacitance.
  • the additional secondary capacitance can be referred to as an earth capacitor.
  • the secondary resonant circuit preferably has a low impedance, which is able to deliver a high starting current of the discharge lamp of a few A.
  • the secondary inductance is characterized by a low direct current resistance, which leads to a small direct current loss during normal operation of the discharge lamp.
  • the DC resistance of the secondary winding is approximately 0.4 ⁇ with a resulting power loss of approximately 100 mW.
  • the voltage pulses are generated in the secondary circuit by means of the primary circuit.
  • a short ignition period until the discharge lamp is ignited is accessible.
  • the ignition duration is less than 500 ⁇ s.
  • An ignition duration of the ignition of the discharge lamp is preferably selected from the range from 1 ⁇ s up to and including 200 ⁇ s and in particular from the range from 10 ⁇ s up to and including 200 ⁇ s.
  • the ignition duration is preferably a maximum of 160 ⁇ s. This means that an emission of electromagnetic radiation caused by the ignition of the discharge lamp is limited to a very short time.
  • the discharge lamp is operated, for example, with a direct current.
  • This direct current can be a pulsating direct current.
  • the discharge lamp can also be operated with an alternating current.
  • the discharge lamp is preferably operated with a rectangular alternating current.
  • the rectangular alternating current has a switching frequency which is selected from the range from 0.1 Hz to 1 kHz inclusive.
  • a switching edge duration is preferably selected from the range from 1 ⁇ s up to and including 100 ⁇ s.
  • the rectangular alternating current means that the electrodes of the discharge lamp are loaded evenly. Compared to a direct current or pulsating direct current, this leads to a homogeneous luminous intensity distribution and to a uniform wear of the electrodes of the discharge lamp.
  • a discharge lamp can be ignited, which is operated with a rectangular alternating current.
  • the ignition duration for igniting the discharge lamp can be kept very short.
  • the primary resonant circuit and the secondary resonant circuit electrically connected to the discharge lamp are electrically isolated from one another.
  • the electrical circuit can be miniaturized.
  • Figure 1 shows an embodiment of the electrical circuit.
  • Figure 2 shows another embodiment of the electrical circuit.
  • FIG. 3 shows the voltage pulses generated for igniting the discharge lamp with the aid of the electrical circuit.
  • the discharge lamp 50 is a low-pressure gas discharge lamp which is operated with a rectangular alternating current with a switching frequency of approximately 130 Hz.
  • the electrical circuit 1 is used, which is implemented in an electronic ballast.
  • the discharge lamp 50 is ignited with the aid of an initial voltage 70, which is superimposed with a plurality of voltage pulses 30 to 33 (FIG. 3).
  • the initial voltage 70 of the discharge lamp 50 is approximately 160 V.
  • the operating voltage 71, with which the discharge lamp 50 is operated after ignition, is approximately 105 V.
  • the electrical circuit 1 is configured such that two voltage pulses 30 and 31 which follow one another in time have a pulse spacing 34 of approximately 180 ns. These voltage pulses 30 and 31 each have one
  • the voltage maxima of the voltage pulses are approximately 800 V with opposite signs.
  • the initial voltage 70 of the discharge lamp 50 is therefore superimposed by an AC voltage with a repetition frequency of approximately 2.7 MHz.
  • This AC voltage from the voltage pulses 30 to 33 leads to the gas of the Discharge lamp 50 is ionized.
  • the discharge lamp 50 is ignited.
  • the electrical circuit 1 (FIGS. 1 and 2) has a primary resonant circuit (excitation resonant circuit) 10, a secondary resonant circuit 20 and, as an inductive coupling element for inductively coupling the two resonant circuits 10 and 20, a transformer 40.
  • the two resonant circuits 10 and 20 are electrically isolated via the transformer 40.
  • the transformer 40 is also an HF-HV transformer with an operating frequency of approximately 2.7 MHz.
  • the primary inductance 41 of the transformer 40 is part of the primary resonant circuit 10.
  • the secondary inductance of the transformer 40 is part of the secondary resonant circuit 20.
  • the inductance of the primary inductance 41 is approximately 24.7 ⁇ H.
  • the inductance of the secondary inductance is approximately 12.5 ⁇ H. This means that transformer 40 is a step-down transformer.
  • the coupling factor between the primary inductance 41 and the secondary inductance 42 is approximately 0.90.
  • DC resistance of the secondary inductance is approximately 0.4 ⁇ , so that a power loss of approximately 100 mW is caused during the operation of the discharge lamp 50.
  • Transformer 40 generates the voltage pulses 30 to 33 in the secondary resonant circuit 20 and is passed on to the electrodes 51 and 52 of the discharge lamp 50.
  • the secondary resonant circuit 20 is electrically connected to the electrodes 51 and 52 of the discharge lamp 50.
  • the primary resonant circuit 10 has a primary input terminal 11 for applying a primary input potential.
  • the primary input potential is 120 V. This is at the primary reference potential connection 12
  • the primary inductance 41 of the transformer 40 has a primary inductance connection 411 and a further primary inductance connection 412.
  • a high-frequency switch 13 is provided for establishing and / or interrupting an electrically conductive connection between the primary reference potential connection 12 and the node 102 of FIG
  • the primary capacitance 14 has a capacitance of approximately 1800 pF.
  • the high-frequency switch 13 has a MOS transistor.
  • the MOS transistor is a CoolMOS® transistor. In the example, this transistor is operated at a frequency of approximately 2.7 MHz.
  • the duty cycle for generating the voltage pulses is approximately 70 ns.
  • the secondary resonant circuit 20 is electrically conductively connected to the discharge lamp 50, so that the voltage pulses 30 to 33 generated in the secondary resonant circuit 20 are passed on to the discharge lamp 50.
  • Oscillating circuit 20 has a secondary input connection (21) for applying a secondary input potential.
  • the secondary input potential is approximately 160 V.
  • the secondary reference potential (ground potential) is applied to the secondary reference potential connection 22.
  • Secondary inductance 42 of transformer 40 has a secondary inductance connection 421 and another Secondary inductance connection 422.
  • a secondary capacitance 23 ignition capacitor
  • a further secondary capacitance 24 ground capacitor
  • the secondary capacitance has a capacitance of approximately 1700 pF and the further secondary capacitance has a capacitance of approximately 47 nF.
  • the secondary capacitance electrode 231 of the secondary capacitance 23, the secondary inductance connection 421 of the secondary inductance 42 and a lamp electrode 51 of the discharge lamp 50 are electrically connected to one another and have a common node 201.
  • the secondary input connection 21, the further secondary capacitance electrode 241 of the secondary capacitance 24 and the further secondary inductance connection 422 of the secondary inductance 42 have a common node 202.
  • the secondary capacitance counter electrode 232 of the secondary capacitance 23, the further secondary capacitance counter electrode 242 of the further secondary capacitance 24, the secondary reference potential connection 22 and a lamp counter electrode 52 of the discharge lamp 50 are electrically connected to one another and have a common node 203.
  • the secondary resonant circuit 20 of the electrical circuit 1 and the discharge lamp 50 are connected to one another via a relatively short electrical line.
  • the ignition duration for igniting the discharge lamp 50 is approximately 50 ⁇ s.
  • the secondary resonant circuit 20 of the electrical circuit 1 and the discharge lamp 50 are via a long electrical line connected with a cable length of 2 x 1.5 m (lead to lamp electrode 51 and lead to lamp counterelectrode 52).
  • This long electrical line is indicated in the circuit diagram in FIG. 2 as cable inductance 60 and further cable inductance 61. The sum is approximately
  • Inductances of the cable inductance 60 and the further cable inductance 61 about 12 ⁇ H. Despite the cable length, the lamp can be used without loss of ignition function and without
  • the ignition duration for igniting the discharge lamp 50 is longer, at about 160 ⁇ s, than in the first exemplary embodiment.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

La présente invention concerne un montage électrique (1) pour allumer au moins une lampe à décharge (50) par application d'au moins une impulsion de tension (30, 31, 32, 33) à une électrode (51, 52) de la lampe à décharge. L'invention a également pour objet un procédé pour allumer la lampe à décharge par application des impulsions de tension à l'électrode de la lampe à décharge. Le montage est conçu de sorte que, pour permettre l'allumage de la lampe à décharge, au moins deux impulsions de tension (30, 31) successives dans le temps sont produites en étant espacées d'un intervalle d'impulsion (34) allant de 2,5 ns à 5 µs. Les impulsions de tension présentent l'avantage d'être produites à une fréquence de succession qui va de 100 kHz à 200 MHz. Ces impulsions de tension haute fréquence sont transmises à l'électrode de la lampe à décharge. Il s'y produit une ionisation du gaz contenu dans la lampe à décharge, en raison des impulsions de tension. Le montage électrique consiste en particulier en deux circuits oscillants séparés d'un point de vue galvanique, les impulsions de tension étant produites par un circuit oscillant primaire (10) au moyen d'un transformateur puissant (40), dans le circuit oscillant secondaire (20). Le montage électrique convient à l'allumage d'une lampe à décharge qui fonctionne avec un courant alternatif rectangulaire.
PCT/EP2003/012862 2002-12-11 2003-11-17 Montage electrique pour allumer une lampe a decharge et procede pour allumer la lampe a decharge WO2004054327A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003288093A AU2003288093A1 (en) 2002-12-11 2003-11-17 Electric circuit for igniting a discharge lamp and method for igniting the discharge lamp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10257919 2002-12-11
DE10257919.9 2002-12-11

Publications (1)

Publication Number Publication Date
WO2004054327A1 true WO2004054327A1 (fr) 2004-06-24

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PCT/EP2003/012862 WO2004054327A1 (fr) 2002-12-11 2003-11-17 Montage electrique pour allumer une lampe a decharge et procede pour allumer la lampe a decharge

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007127070A2 (fr) 2006-04-21 2007-11-08 Xenon Corporation Appareil et procédé d'allumage d'une lampe à décharge de gaz multifrappe
WO2010060842A1 (fr) * 2008-11-28 2010-06-03 Osram Gesellschaft mit beschränkter Haftung Lampe à décharge gazeuse intégrée comprenant une électronique d'amorçage intégrée dans le culot pour générer des impulsions d'amorçage asymétriques

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428268A (en) * 1993-07-12 1995-06-27 Led Corporation N.V. Low frequency square wave electronic ballast for gas discharge
US5945786A (en) * 1997-06-02 1999-08-31 High End Systems, Inc. Discharge lamp igniter with reduced noise output
US6194845B1 (en) * 1999-11-03 2001-02-27 Osram Sylvania Inc. Ballasts with tapped inductor arrangements for igniting and powering high intensity discharge lamps
US6437515B1 (en) * 2000-01-18 2002-08-20 Matsushita Electric Works, Ltd. Discharge lamp lighting device of high startability with high pulse voltage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428268A (en) * 1993-07-12 1995-06-27 Led Corporation N.V. Low frequency square wave electronic ballast for gas discharge
US5945786A (en) * 1997-06-02 1999-08-31 High End Systems, Inc. Discharge lamp igniter with reduced noise output
US6194845B1 (en) * 1999-11-03 2001-02-27 Osram Sylvania Inc. Ballasts with tapped inductor arrangements for igniting and powering high intensity discharge lamps
US6437515B1 (en) * 2000-01-18 2002-08-20 Matsushita Electric Works, Ltd. Discharge lamp lighting device of high startability with high pulse voltage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007127070A2 (fr) 2006-04-21 2007-11-08 Xenon Corporation Appareil et procédé d'allumage d'une lampe à décharge de gaz multifrappe
EP2022296A2 (fr) * 2006-04-21 2009-02-11 Xenon Corporation Appareil et procede d'allumage d'une lampe a decharge de gaz multifrappe
EP2022296A4 (fr) * 2006-04-21 2010-09-29 Xenon Corp Appareil et procede d'allumage d'une lampe a decharge de gaz multifrappe
WO2010060842A1 (fr) * 2008-11-28 2010-06-03 Osram Gesellschaft mit beschränkter Haftung Lampe à décharge gazeuse intégrée comprenant une électronique d'amorçage intégrée dans le culot pour générer des impulsions d'amorçage asymétriques
CN102227955A (zh) * 2008-11-28 2011-10-26 欧司朗有限公司 集成的气体放电灯，具有集成到底座中的用于产生不对称点火脉冲的点火电子设备

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