WO2013135518A1 - Dispositif d'allumage, comportant un commutateur à semi-conducteur, pour une lampe à décharge haute pression et dispositif de fonctionnement comportant un tel dispositif d'allumage - Google Patents

Dispositif d'allumage, comportant un commutateur à semi-conducteur, pour une lampe à décharge haute pression et dispositif de fonctionnement comportant un tel dispositif d'allumage Download PDF

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Publication number
WO2013135518A1
WO2013135518A1 PCT/EP2013/054301 EP2013054301W WO2013135518A1 WO 2013135518 A1 WO2013135518 A1 WO 2013135518A1 EP 2013054301 W EP2013054301 W EP 2013054301W WO 2013135518 A1 WO2013135518 A1 WO 2013135518A1
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WO
WIPO (PCT)
Prior art keywords
ignition
discharge lamp
pressure discharge
ignition device
transformer
Prior art date
Application number
PCT/EP2013/054301
Other languages
German (de)
English (en)
Inventor
Michael Boenigk
Original Assignee
Osram 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
Application filed by Osram Gmbh filed Critical Osram Gmbh
Publication of WO2013135518A1 publication Critical patent/WO2013135518A1/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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices

Definitions

  • the invention relates to an ignition device according to the preamble of claim 1 and an operating device for a high-pressure discharge lamp with such Zündvorrich ⁇ tion.
  • Such an ignition device and operating device is disclosed, for example, in EP 0 975 007 A1.
  • This document ⁇ ment describes an ignition device, which is designed as a pulse starting device for a high pressure discharge lamp and has an ignition transformer to produce the required for igniting the gas discharge in the high-pressure discharge lamp ignition voltage.
  • This ignition device has a firing capacitor and a spark gap, which are arranged together with the primary winding of the ignition transformer in a DC path, that the ignition capacitor is charged during the ignition phase of the high pressure discharge lamp to the breakdown voltage ⁇ of the spark gap and then intermittently over the spark gap and the primary winding discharges.
  • FIG. 1 shows the components of the operating device and ignition device according to FIG The prior art somewhat more detailed than shown in EP 0 975 007 AI.
  • This prior art pulse ignition apparatus includes an ignition transformer having a primary winding N2 and a secondary winding Nl, a firing capacitor Cl, and a spark gap FS.
  • the series ⁇ circuit consisting of the secondary winding Nl of the ignition transformer and the discharge path of Hochdruckentla ⁇ tion lamp L is connected in the bridge branch of a full-bridge inverter, which is essentially formed by the transistors Tl, T2, T3, T4 and an input voltage of +400V is connected.
  • the pulse ignition device is supplied by means of an additional terminal with a DC voltage ⁇ 600 V with negative polarity.
  • the Be ⁇ reference symbols Jl, J2, J3 denote in Figure 1 connections between the igniter and the other components of the operating device.
  • the ignition device according to the prior art is relatively expensive in terms of the number of components required and the cost.
  • the maximum repetition frequency of the ignition pulses is severely limited by technical constraints. However, this is the prerequisite for improving the ignition in many discharge lamp systems.
  • the ignition device according to the invention has a Zündtrans ⁇ formator for generating the ignition voltage required for igniting the gas discharge in the high pressure discharge lamp, wherein the ignition transformer has at least one primary winding which is inductively coupled to at least one secondary winding of the ignition ⁇ transformer.
  • the ignition device ⁇ a controllable with high-frequency control signals semiconductor switch, by means of the switching path of the current flow through the at least one primary winding during the ignition phase of the high pressure discharge lamp with high frequency on and off.
  • the controllable semiconductor switch allows control by means of high-frequency control signals, so that its switching ⁇ distance in short time intervals is electrically conductive or not electrically conductive.
  • the current flow through the primary winding in correspondingly short Zeitvalval ⁇ len on or off.
  • a high-voltage pulse is induced in the secondary winding of the ignition transformer. Therefore, a group of high voltage pulses clamping ⁇ is induced with a correspondingly high frequency by high frequency switching on and off of the controllable semiconductor switch in the secondary winding of the ignition transformer, leading to the ignition of the gas discharge in the high pressure discharge lamp.
  • high frequency or “high frequency” or “high frequency” in this patent application denotes a frequency range of 100 kHz to 10 MHz.
  • the controllable with high-frequency control signals semiconductor switch of the ignition device or operating device according to the invention is therefore controllable with control signals in the frequency range of 100 kHz to 10 MHz, so that by means of its switching path of the current flow through the at least one primary winding of the ignition ⁇ transformer of the ignition during the ignition phase of High-pressure discharge lamp with a correspondingly high frequency on and off is.
  • the ignition device according to the invention requires neither a spark gap nor a starting capacitor and therefore requires less high-performance components than the ignition device according to the prior art and is therefore simpler and more cost-effective.
  • the ignition device according to the invention has a timing clock for controlling the switching operations of the semiconductor switch.
  • high-frequency switching signals for controlling the switching operations of the semiconductor switch can be generated by simple means.
  • the time clock Made possible in particular to light the time clock to generate in recurring time intervals further consequences of high-frequency switching signals if induced by each vorangegan- gene sequence of switching signals group has not led high-voltage pulses in the secondary winding of the ignition transformer to ignite the gas discharge in the high pressure discharge lamp ,
  • the semiconductor scarf ⁇ ter of the ignition device according to the invention is designed such that it has a control electrode to which the timing contact ⁇ encoder is connected.
  • the clock is preferably designed such that it can generate high-frequency control signals, that is control signals in the frequency range of 100 kHz to 10 MHz, for controlling the switching operations of the controllable semiconductor switch of the ignition device according to the invention to generate correspondingly high-frequency high voltage pulses for igniting the gas discharge in the high pressure discharge lamp can.
  • the semiconductor switch is sistor as transit and particularly preferably as a bipolar transistor with iso ⁇ profiled control electrode or gate electrode (IGBT) or a metal oxide semiconductor field effect transistor (MOSFET) trained det. As a result, it is very robust, tolerates high electrical power and allows almost powerless control.
  • the ignition device according to the invention has ei ⁇ ne rectifier bridge, which is provided as reverse polarity protection for the semiconductor switch.
  • the ignition device according to the invention can be used both in operating devices which provide a positive supply voltage for the ignition device and in operating devices which provide a negative supply voltage for the ignition device.
  • ⁇ makes the rectifier bridge, that in both cases the voltage has the proper polarity at the terminals of the semiconductor switch.
  • the ignition device has at least one capacitor which is connected in parallel to the primary winding or secondary winding of the ignition transformer.
  • the at least one capacitor in the form of high voltage pulses can be changed or for igniting the gas- ⁇ charge in the high pressure discharge lamp, the Re ⁇ sonanzfrequenz of the ignition transformer are compared, to thereby improve the ignitability of the high pressure discharge lamp.
  • the ignition device according to the invention is preferably designed as Be ⁇ part of an operating device for a Hochdruckentla ⁇ tion lamp.
  • the components of the ignition device according to the invention can be accommodated together with the components of the operating device in the interior of a lamp cap of the high-pressure discharge lamp.
  • the components of the ignition device according to the invention can be accommodated together with the components of the operating device in the housing of a Be ⁇ drive device arranged separately to the high-pressure discharge lamp.
  • Kings ⁇ nen the components of the ignition device according to the invention be arranged separated from the components of the operating device.
  • the components of the erfindungsge ⁇ MAESSEN ignition device may be housed in the interior of a lamp base of the high pressure discharge lamp, and the components of the operating device may be housed in the housing of which is arranged separately from the high pressure discharge lamp lighting device.
  • the operation device preferably comprises a full bridge inverter to, in the bridge branch of the Hochdruckent- discharge lamp and the igniter according to the invention are ge ⁇ on.
  • the polarity of the lamp current changes in the switching cycle of the transistors of the full-bridge inverter and a separation of positive negative ions in the discharge plasma of the high-pressure discharge lamp is avoided.
  • the ignition device according to the invention can be used instead of the conventional pulse ignition device in the known operating devices.
  • At least one capacitor is connected in parallel with the discharge path of the high-pressure discharge lamp.
  • the at least one capacitor in the form of high voltage pulses can be changed for igniting the gas discharge in the high-pressure discharge lamp or the Resonanzfre acid sequence of the ignition transformer are changed, and the parallel to the discharge path of the high pressure discharge lamp maralte- te capacitor can additionally or alternatively be referred to the above , be used parallel to the primary or secondary winding of the ignition transformer switched capacitor.
  • the ignition device according to the invention can be used particularly advantageously for high-pressure discharge lamps which have a capacitive starting aid in the form of an electrically conductive coating on their lamp vessel. Through this capacitive The ignition aid reduces the ignition voltage required to ignite the gas discharge in the high-pressure discharge lamp. High-frequency high-voltage pulses having a relatively low amplitude of only approximately 7 kV to 10 kV are sufficient to ignite the gas discharge in the high-pressure discharge lamp.
  • the ignition device according to the invention is used to Zün ⁇ the gas discharge in a metal halide high-pressure discharge lamp, which serves as a light source in a motor vehicle headlight.
  • Figure 1 is a circuit diagram of an operating device
  • Ignition device according to the prior art Figure 2 A circuit diagram of an operating device
  • Figure 3 is a circuit diagram of an operating device
  • FIG 4 shows the time course of three groups of Zündnapssimpulsen which were generated by means of the ignition device according to the invention
  • FIG. 5 The time profile of a group of ignition voltage pulses, which by means of the invention
  • FIG. 2 shows a circuit diagram of the operating device and ignition device for a high-pressure discharge lamp according to FIG 0
  • the operation ⁇ and ignition device and the high-pressure discharge lamp are components of an automotive headlamp.
  • the operating device has a full-bridge inverter, which is essentially formed by four transistors T1, T2, T3, T4 and their control circuits (not shown).
  • the transistors Tl, T4 and T2, T3 each form a synchronously switching transistor pair Tl, T4 and T2, T3.
  • the two pairs of transistors Tl, T4 and T2, T3 are switched on and off alternately, usually with a comparatively low frequency of about 500 Hz.
  • the bridge branch of the full-bridge inverter Tl, T2, T3, T4 an ignition ⁇ transformer of the ignition device for the high-pressure discharge lamp LA1 are connected.
  • the discharge are ⁇ distance L of the high pressure discharge lamp LA1 and the secondary winding Nl ⁇ arranged in series in the bridge branch.
  • ei ⁇ ne DC power supply in the amount of 400 V for the full-bridge inverter Tl, T2, T3, T4 is provided.
  • the electric potential at terminal 0 V corresponds to the stale ⁇ tung internal ground reference potential.
  • the DC power supply is in a known manner (not shown) by means of a boost Stel ⁇ coupler from the vehicle system voltage of a motor vehicle generated.
  • the additionally existing connection - 600 V of the operating device is not required for the ignition device according to the first exemplary embodiment of the invention and is therefore not used by the ignition device. That is, the compound Jl is ACCORDING not ge uses ⁇ from the igniter to the first embodiment of the invention. _
  • the ignition device which is connected at the connection points J2, J3 (FIG. 2) to the bridge branch of the full-bridge inverter T1, T2, T3, T4, essentially consists of a transistor T5, in particular an insulated bipolar transistor Gate electrode (IGBT), and a timing clock (not till ⁇ forms) for controlling the switching operations of the transistor T5 and an ignition transformer, each having a primary winding N2 and a secondary winding Nl.
  • the primary winding N2 of the ignition transformer is connected in series with the switching path of the transistor T5.
  • the secondary winding of the ignition Nl ⁇ transformer is connected in series with the discharge path L of the high pressure discharge lamp ⁇ LAl.
  • the transistor T5 of the ignition device according to the first embodiment of the invention for the turn-on of the transistor pair Tl, T4 of the full-bridge inverter Tl, T2, T3, T4 means of the clock, for example by means of a timer type NE555 a duration of about 16 ys with high-frequency switching signals of 500 kHz applied, so that the switching path of the transistor T5 is turned on and off eight times during this period.
  • the transistor T5 is turned on and off eight times, so that during this period eight high-voltage pulses are induced in the secondary winding N1 of the ignition transformer.
  • Each of these eight high-voltage pulses is a high-voltage ⁇ vibration with high frequency and a decaying amplitude.
  • FIG. 5 shows such a group of eight high-voltage pulses.
  • the transistor T5 is switched off permanently by means of the clock generator and disables the ignition device characterized. After ignition of the gas discharge in the high pressure discharge lamp LAl the lamp current flowing over the Se ⁇ kundärwicklung Nl of the ignition transformer and the now elekt ⁇ driven conductive discharge path L of the high-pressure discharge lamp LAl.
  • the polarity of the lamp current is reversed at the switching frequency of the transistor pairs Tl, T4 and T2, T3 of the full-bridge inverter periodically with a comparatively ⁇ as low frequency of 500 Hz.
  • the transistor T5 becomes active for a period of about 100 ys during the switch-on duration of the transistor pair T1, T4 of the full-bridge inverter T1, T2, T3 , T4 again by means of the timing clock for a further period of about 16 ys with high-frequency switching signals of 500 kHz beauf- so as to induce again a group of eight Hochspan ⁇ tion pulses in the secondary winding Nl, thereby igniting the gas discharge in the Hoch horrentla - triggering lamp LA1.
  • a total of three groups of eight high voltage pulses are shown which ys successive fol ⁇ gene.
  • the ignition device according to egg ner certain number of unsuccessful ignition attempts by means of the clock generator and the transistor T5 off.
  • FIG. 3 schematically shows a circuit diagram of the operating device and ignition device for a high-pressure discharge lamp according to the second exemplary embodiment of the invention.
  • the operating and ignition device and the high ⁇ pressure discharge lamp are components of a motor vehicle ⁇ headlamp.
  • the operating device has a full-bridge inverter, which is essentially formed by four transistors T1, T2, T3, T4 and their control circuits (not shown).
  • the transistors Tl, T4 and T2, T3 each form a synchronously switching transistor pair Tl, T4 and T2, T3.
  • the two pairs of transistors Tl, T4 and T2, T3 are switched on and off alternately, usually with a comparatively low frequency of about 500 Hz.
  • the high pressure discharge lamp LA1 ⁇ and the secondary winding Nl of an ignition ⁇ transformer are connected in the ignition device for the high-pressure discharge lamp LA1.
  • the discharge are length L of the high pressure discharge lamp LA1 and the secondary winding Nl ⁇ arranged in series in the bridge branch.
  • ei ⁇ ne DC power supply in the amount of 400 V for the full-bridge inverter Tl, T2, T3, T4 is provided.
  • the electric potential at terminal 0 V corresponds to the stale ⁇ tung internal ground reference potential.
  • the DC voltage supply is in a known manner by means of a boosting Lers (not shown) from the vehicle electrical system voltage of a power ⁇ vehicle generated.
  • the additional connection 600 V of the operating device is not required for the ignition device according to the second exemplary embodiment of the invention and is therefore not used by this ignition device. That is, the connection Jl is not used by the ignition device according to the second embodiment of the invention.
  • the ignition device which is connected at the connection points J2, J3 (FIG. 3) to the bridge branch of the full-bridge inverter T1, T2, T3, T4, essentially consists of a transistor T5, in particular a bipolar transistor with insulated gate. Electrode (IGBT), and a timing clock ST for controlling the switching operations of the transistor T5 and a Zünd ⁇ transformer, each having a primary winding N2 and a secondary winding Nl.
  • the primary winding of the ignition transformer is N2 ge ⁇ connected in series with the switching path of the transistor T5.
  • the secondary winding Nl of the ignition transformer is connected in series with the discharge path L of the high-pressure discharge lamp LA1.
  • the ignition device comprises a four-diode rectifier bridge Dl, D2, D3, D4, which serves as reverse polarity protection for the transistor T5 and for the control of the transistor T5 by means of the timing clock ST.
  • a terminal of the timing clock ST and the series circuit consisting of the primary winding N2 and the switching path of the transistor T5 are connected.
  • the voltage inputs of the rectifier bridge D1, D2, D3, D4 are connected to the bridge branch of the full-bridge inverter T1, T2, T3, T4.
  • the ignition device in accordance with the two ⁇ th embodiment of the invention has the advantage that during can generate the duty cycle of the transistor pair Tl, T4 and during the duty cycle of the other pair of transistors T2, T3 high voltage pulses for igniting the gas discharge in the high pressure discharge lamp LA1 both.
  • the Zünd ⁇ device works according to the second embodiment of the invention in the same manner as the ignition device according to the first Embodiment of the invention.
  • the transistor T5 of the ignition device is supplied with high-frequency switching signals of 500 kHz for a duration of approximately 16 ys, so that the switching path of the transistor T5 is turned on and off eight times during this period.
  • ⁇ off state of the switching path of the transistor T5 is the primary winding N2 of the ignition transformer over the DC ⁇ rectifier bridge Dl, D2, D3, D4 and either the Transis ⁇ torfind Tl, T4 or the other pair of transistors T2, T3 of the full bridge inverter with the DC power supply connected to the terminals 0 V and +400 V of the full-bridge inverter, so that a direct current flows through the primary winding Nl.
  • the transistor T5 is the Current flow through the primary winding N2 interrupted. This switch-off process causes a voltage increase in accordance with the law of induction.
  • This voltage appears at the secondary winding corresponding to the Nl Windungsver consent- nis N1 / N2 highly transformed and is an electrode of the high pressure discharge lamp LA1 as ignition voltage pulse supplied ⁇ leads is to ignite the gas discharge in the high-pressure discharge lamp LA1.
  • the transistor T5 is turned on and off eight times, so that during this period eight high-voltage pulses are induced in the secondary winding Nl of the ignition transformer.
  • Each of these eight high voltage pulses is a high voltage oscillation with decaying amplitude.
  • FIG. 5 shows such a group of eight high-voltage pulses.
  • the gas ⁇ discharge in the high pressure discharge lamp LA1 successfully ignited
  • the Tran ⁇ sistor T5 is permanently switched off by means of the clock generator ST and the igniter ge ⁇ Gurss activated by de- to the second embodiment of the invention
  • the lamp current flows via the secondary winding Nl of the ignition transformer and the now electrically conductive discharge path L of the high-pressure discharge lamp LA1.
  • the polarity of the lamp current is the switching frequency of the transistor pairs Tl, T4 and T2, inverter periodically reversed T3 of the full-bridge with a comparatively niedri ⁇ gene frequency of 500 Hz.
  • the transistor T5 becomes active for a period of about 100 ys during the switch-on duration of the transistor pair T1, T4 of the full-bridge inverter T1, T2, T3 , T4 again
  • the timing clock ST for a further duration of about 16 ys with high-frequency switching signals of 500 kHz applied so as to induce again a group of eight high-voltage pulses ⁇ in the secondary winding Nl and thereby trigger the ignition of the gas discharge in the high-pressure discharge lamp LA1.
  • a total of three groups of eight high voltage pulses are shown which ys successive fol ⁇ gene.
  • the ignition device according to the second embodiment of the invention after a certain number of unsuccessful ignition attempts by means of the clock generator ST and the transistor T5 off.
  • the invention is not limited to the exemplary embodiments described in greater detail above.
  • the numerical values for the switching frequency of the transistor pairs of the full-bridge inverter T1, T2, T3, T4 mentioned in the exemplary embodiments are the switching frequency of the transistor T5 of the ignition device and the resulting number of turn-on and turn-off operations of the transistor T5 during each one Ignition test and the pause duration between two groups of high-frequency high-voltage pulses or between two ignition tests only as examples.
  • the switching frequency of the transistor pairs of the Voll stipulaten prompt- judge Tl, T2, T3, T4 is usually low, in the loading range from approximately 100 Hz to 1 kHz, chosen to reverse the polarity of the lamp current through the high-pressure discharge lamp with entspre ⁇ accordingly low frequency periodically so that no acoustic resonances in the discharge plasma of the high-pressure discharge lamp are excited.
  • the switching frequency of the transistor T5 of the ignition device is in the high frequency range, that is in the range of about 100 kHz to 10 MHz, to corresponding high frequency ignition voltage pulses or high voltage pulses for igniting the gas discharge in the high pressure discharge lamp to create.
  • the switching frequency of the transistor T5 is tuned to the impedance of the ignition transformer Nl, N2.
  • a capacitor (not from ⁇ formed) can be switched to change the shape and amplitude of high voltage pulses, as well as the resonant frequency.
  • the switching frequency of the transistor T5 may be particularly tuned to the resonant frequency of the resonant circuit formed by the transformer windings Nl, N2 and the aforementioned capacitor, the ignition or the complete Be ⁇ drive device including ignition device may be underweight body ⁇ introduced in the lamp base to be operated high pressure discharge lamp.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention concerne un dispositif d'allumage pour une lampe à décharge haute pression, comportant un transformateur d'allumage pour générer la tension d'allumage requise pour allumer la décharge de gaz dans la lampe à décharge haute pression (LA1). Le transformateur d'allumage comporte au moins un enroulement primaire (N2) qui est couplé par induction à au moins un enroulement secondaire (N1) du transformateur d'allumage. Le dispositif d'allumage comporte un commutateur à semi-conducteur (T5) qui peut être commandé au moyen de signaux de commande haute fréquence, et au moyen du trajet de commutation duquel le flux de courant peut être enclenché et coupé sous haute fréquence par l'au moins un enroulement primaire (N2) pendant la phase d'allumage de la lampe à décharge haute pression (LA1).
PCT/EP2013/054301 2012-03-15 2013-03-04 Dispositif d'allumage, comportant un commutateur à semi-conducteur, pour une lampe à décharge haute pression et dispositif de fonctionnement comportant un tel dispositif d'allumage WO2013135518A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102012204116 2012-03-15
DE102012204116.8 2012-03-15
DE102012204324.1 2012-03-19
DE201210204324 DE102012204324A1 (de) 2012-03-15 2012-03-19 Zündvorrichtung für eine Hochdruckentladungslampe und Betriebsvorrichtung mit einer derartigen Zündvorrichtung

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WO2013135518A1 true WO2013135518A1 (fr) 2013-09-19

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PCT/EP2013/054301 WO2013135518A1 (fr) 2012-03-15 2013-03-04 Dispositif d'allumage, comportant un commutateur à semi-conducteur, pour une lampe à décharge haute pression et dispositif de fonctionnement comportant un tel dispositif d'allumage

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DE (1) DE102012204324A1 (fr)
WO (1) WO2013135518A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878982A2 (fr) * 1997-05-16 1998-11-18 Denso Corporation Appareil pour lampe à décharge haute-tension
EP0975007A1 (fr) 1998-07-13 2000-01-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Système d'éclairage avec une lampe à décharge à haute pression
DE19923263A1 (de) * 1999-05-20 2000-11-23 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Zünden einer Lampe
DE102004045834A1 (de) * 2004-09-22 2006-03-23 Bag Electronics Gmbh Zündgerät
US20080074054A1 (en) * 2006-09-25 2008-03-27 Osram Sylvania, Inc. Circuit for Igniting a High Intensity Discharge Lamp
FR2909510A1 (fr) * 2006-11-30 2008-06-06 Valeo Vision Sa Ballast pour lampe a decharge
EP2273853A1 (fr) * 2008-04-24 2011-01-12 Panasonic Electric Works Co., Ltd Dispositif d'éclairage à lampe à décharge à haute tension et appareil d'éclairage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878982A2 (fr) * 1997-05-16 1998-11-18 Denso Corporation Appareil pour lampe à décharge haute-tension
EP0975007A1 (fr) 1998-07-13 2000-01-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Système d'éclairage avec une lampe à décharge à haute pression
DE19923263A1 (de) * 1999-05-20 2000-11-23 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Zünden einer Lampe
DE102004045834A1 (de) * 2004-09-22 2006-03-23 Bag Electronics Gmbh Zündgerät
US20080074054A1 (en) * 2006-09-25 2008-03-27 Osram Sylvania, Inc. Circuit for Igniting a High Intensity Discharge Lamp
FR2909510A1 (fr) * 2006-11-30 2008-06-06 Valeo Vision Sa Ballast pour lampe a decharge
EP2273853A1 (fr) * 2008-04-24 2011-01-12 Panasonic Electric Works Co., Ltd Dispositif d'éclairage à lampe à décharge à haute tension et appareil d'éclairage

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