EP0886882A1 - Gas discharge lamp, in particular for a motor-vehicle headlight - Google Patents

Gas discharge lamp, in particular for a motor-vehicle headlight

Info

Publication number
EP0886882A1
EP0886882A1 EP97916330A EP97916330A EP0886882A1 EP 0886882 A1 EP0886882 A1 EP 0886882A1 EP 97916330 A EP97916330 A EP 97916330A EP 97916330 A EP97916330 A EP 97916330A EP 0886882 A1 EP0886882 A1 EP 0886882A1
Authority
EP
European Patent Office
Prior art keywords
gas discharge
discharge lamp
base
electrode
lamp according
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
EP97916330A
Other languages
German (de)
French (fr)
Other versions
EP0886882B2 (en
EP0886882B1 (en
Inventor
Hartmut Seiler
Robert Kern
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/192—Details of lamp holders, terminals or connectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/56—One or more circuit elements structurally associated with the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure

Definitions

  • Such gas discharge lamps or high-pressure discharge lamps are known, for example, from DE-OS 35 19 611.
  • the ballast required to supply the lamp with the necessary ignition and burning voltage is arranged in the known lamp in a molded housing which is arranged on the rear part of the reflector of the motor vehicle headlight unit.
  • this housing increases the overall depth of the motor vehicle headlight unit, the high-voltage lines having to be led from the molded housing to the burner vessel of the lamp. This leads to insulation problems and line 1 losses.
  • the ballast and the high-voltage lines are advantageously replaced at the same time by simply exchanging the gas discharge lamp, so that most sources of error can be eliminated quickly and easily.
  • an inductive ignition component contained in the ballast in particular an ignition pulse transmitter, has a closed core, preferably a toroidal core, as a result of which a high inductance can be achieved with a small number of turns.
  • a closed core preferably a toroidal core
  • a lamp base By overmolding or potting the components required for the ballast together with an end area of the burner vessel with plastic material, a lamp base can be formed in a simple and inexpensive manner which, in addition to its function as a lamp base, also holds the components together and binds to the burner vessel.
  • This lamp base also serves at the same time as an insulating body, the electrical connections of the lamp base also expediently being encapsulated or encapsulated, so that practically the entire lamp base is formed in one operation.
  • the electrode bushing arranged in the end region of the burner vessel remote from the lamp base is returned to the lamp base via an outer line and connected there with a corresponding electrical connection, which leads to a simple and inexpensive solution overall, the region of this outer line running in the lamp base of course being the same can be encapsulated or encapsulated.
  • the ignition voltage can advantageously also be reduced by attaching an auxiliary electrode.
  • the outer line is expediently connected to or forms an auxiliary electrode, this auxiliary electrode preferably being arranged in the vicinity of the first main electrode near the base.
  • auxiliary electrode is designed as a wire or conductive strip lying on the outside of the burner vessel.
  • the polarity of the first main electrode near the base is negative with respect to the polarity of the other, with which the first electrode is electrically de connected second main electrode. This ensures that the spark that jumps from the first main electrode near the base to the auxiliary electrode, namely through the glass wall of the burner vessel, can follow the subsequent spark to the second main electrode without changing the polarity of the first main electrode.
  • FIG. 1 shows a sectional illustration of the gas discharge lamp provided with a lamp base as an exemplary embodiment
  • the gas discharge lamp shown in FIG. 1 essentially consists of a burner vessel 10 which is embedded in a lamp base 11.
  • the burner vessel 10 which is made of glass or another transparent, temperature-resistant material, has a central combustion chamber 12 with a flattened spherical shape or ellipsoidal shape, which has two tubular extensions 13, 14 on opposite sides.
  • the end regions of these tubular extensions 13, 14 are designed as gas-tight current feedthroughs for two main electrodes 15, 16, which extend slightly into the combustion chamber 12 from both sides.
  • the arc forms during operation between these main electrodes 15, 16.
  • the lamp base 11 is designed as a molded body or injection molded body and consists of insulating plastic material.
  • the lamp base 11 contains electronic components 19, which are only shown schematically and which, together with the ignition pulse transformer 17, form a ballast which supplies the lamp with the required ignition and operating voltage.
  • the lamp base 11 also has two ring-shaped electrical connections 20, 21, of which the inner one is connected to the first main electrode 15 and the outer one is connected to the ignition pulse transmitter 17.
  • a second connection of the ignition pulse transmitter 17 is connected to an outer line 22 which extends from the lamp base 11 essentially parallel to the burner vessel 10 and is electrically connected at its free end to the second main electrode 16.
  • This outer line 22 is designed as a wire or rod.
  • the outer line 22 leads to this first extension 13 and forms an outer auxiliary electrode 23 there, which is thus electrically connected to the second main electrode 16 .
  • This auxiliary electrode 23 can also be designed as a conductive strip, for example as a conductive lacquer strip made of conductive silver or the like.
  • the polarity of the first main electrode 15 near the base is negative with respect to the polarity of the second main electrode 16 and the auxiliary electrode 23, in order to ensure that after the initial spark that jumps through the glass from the main electrode 15 to the auxiliary electrode 23, the subsequent spark up to the second main electrode 16 without Polarity change of the main electrode 15 can follow.
  • the ignition pulse s ' transmitter 17, the burner vessel 10, the electronic components 19, the electrical connections 20, 21 and the outer line 22 are molded or cast together with plastic material to form the lamp base 11. With the help of the lamp base 11, the lamp can be inserted into a base, for example of a motor vehicle headlight.
  • FIG. 2 shows a possible circuit for a ballast.
  • the two electrical connections 20, 21 are connected to one another via the series connection of a first winding 24 of the ignition pulse transmitter 17 with the two main electrodes 15, 16 of the burner vessel 10. Furthermore, the two electrical connections 20, 21 are connected to a resistor 26 via the series connection of a capacitor 25. The series connection of a second winding 27 of the ignition pulse transformer 17 with a spark gap 28 is connected in parallel with the capacitor 25.
  • the circuit shown in FIG. 2 represents only one of many known possibilities for such a ballast. Further circuits for ballasts of gas discharge lamps are, for example, in "Lamps and Lighting", 2nd edition, ST Henderson and AM Marsden, p. 328 ff, shown and described. From the large number of circuits for ballasts shown there, it is evident, among other things, that the ignition pulse transmitter 17 can also be designed as a simple choke or coil in some circuits.
  • the lamp base 11 can also be as a prefabricated housing for receiving the components, such as Zündimpul s' exchangers 17, burner tube 10, electrical components 19, electrical connections 20, 21 and outer conduit 22 may be formed. Furthermore, only a part of these components can be encapsulated or encapsulated, while another part is housed in a prefabricated housing.
  • the auxiliary electrode 23 can also be omitted, have a different shape or be designed as an electrode which is supplied separately with an ignition voltage.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

The invention relates to a gas discharge lamp, in particular for motor-vehicle headlights, which has a maintaining-arc vessel (10) consisting of glass or the like, having at least two electrodes (15, 16, 23) and provided with a lamp base (11) which can be inserted into a base holder and has the electric connections (20, 21). A ballast is arranged in the lamp base (11) and supplies the lamp with the required starting and maintaining-arc voltage. Housing the ballast in the lamp base (11) produces an on-board, compact gas discharge lamp with short high voltage leads, thereby keeping the starting voltage low.

Description

Gasentladungslampe, insbesondere für Kraftfahrzeug-ScheinwerferGas discharge lamp, in particular for motor vehicle headlights
STAND DER TECHNIKSTATE OF THE ART
Die Erfindung betrifft eine Gasentladungslampe, insbe¬ sondere für Kraftfahrzeug-Scheinwerfer, nach der Gattung des Hauptanspruchs.The invention relates to a gas discharge lamp, in particular for motor vehicle headlights, according to the preamble of the main claim.
Derartige Gasentladungslampen bzw. Hochdruckentladungs¬ lampen sind beispielsweise aus der DE-OS 35 19 611 be¬ kannt. Das erforderliche Vorschaltgerät zur Versorgung der Lampe mit der notwendigen Zünd- und Brennspannung ist bei der bekannten Lampe in einem Formgehäuse angeordnet, das am rückwärtigen Teil des Reflektors der Kraftfahrzeug- Scheinwerfer-Einheit angeordnet ist. Dieses Gehäuse vergrößert dadurch die Bautiefe der Kraftfahrzeug-Schein¬ werfer-Einheit, wobei die hochspannungsführenden Leitungen vom Formgehäuse zum Brennergefäß der Lampe geführt werden müssen. Dies bringt Isolationsprobleme und Leitungsver- 1 uste mit sich.Such gas discharge lamps or high-pressure discharge lamps are known, for example, from DE-OS 35 19 611. The ballast required to supply the lamp with the necessary ignition and burning voltage is arranged in the known lamp in a molded housing which is arranged on the rear part of the reflector of the motor vehicle headlight unit. As a result, this housing increases the overall depth of the motor vehicle headlight unit, the high-voltage lines having to be led from the molded housing to the burner vessel of the lamp. This leads to insulation problems and line 1 losses.
VORTEILE DER ERFINDUNGADVANTAGES OF THE INVENTION
Durch die Integration des Vorschal tgeräts im Lampensockel kann ein sehr kleines Gesamtvol umemn erreicht werden, und die Baugrößer der Kraftfahrzeug-Scheinwerfer-Einheit als solche vergrößert sich praktisch nicht. Durch die Unter¬ bringung im Lampensockel sind die Mittel zur Zünd¬ spannungserzeugung praktisch direkt neben dem Brennergefäß angeordnet und bilden eine feste Einheit, so daß die Leitungslänge der hochspannungsführenden Leitungen minimal wird. Hierdurch wird eine geringere Leitungskapazität und dadurch eine geringere notwendige Energie zum Erreichen der Zündspannung erreicht. Hierdurch verringert sich auch die Baugröße des ZündimpulsÜbertragers, was wiederum die direkte Montage am Brennergefäß ermöglicht. Durch die geringe Länge der hochspannungsführenden Leitungen ver¬ ringern sich die Isolationsprobleme, und die im Vorschalt¬ gerät zu erzeugende Zündspannung kann reduziert werden. Bei eventuellen Störungen oder Defekten werden in vorteil¬ hafter Weise durch einfaches Austauschen der Gas¬ entladungslampe gleichzeitig das Vorschaltgerät und die Hochspannungsleitungen mitausgetauscht, so daß dadurch die meisten Fehlerquellen schnell und einfach beseitigt werden können .By integrating the ballast in the lamp base, a very small total volume can be achieved, and the size of the motor vehicle headlight unit as such practically does not increase. Due to the accommodation in the lamp base, the means for generating the ignition voltage are arranged practically directly next to the burner vessel and form a fixed unit, so that the line length of the high-voltage lines is minimal becomes. As a result, a lower line capacity and thus a lower energy required to reach the ignition voltage is achieved. This also reduces the size of the ignition pulse transmitter, which in turn enables direct mounting on the burner vessel. The short length of the high-voltage lines reduces the insulation problems, and the ignition voltage to be generated in the ballast can be reduced. In the event of any malfunctions or defects, the ballast and the high-voltage lines are advantageously replaced at the same time by simply exchanging the gas discharge lamp, so that most sources of error can be eliminated quickly and easily.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Gasentladungslampe möglich.Advantageous further developments and improvements of the gas discharge lamp specified in claim 1 are possible through the measures listed in the subclaims.
Ein im Vorschaltgerät enthaltenes induktives Zündbauteil , insbesondere ein Zündimpulsübertrager, besitzt gemäß einer vorteilhaften Ausgestaltung der Erfindung einen geschlos¬ senen Kern, vorzugsweise einen Ringkern, wodurch sich mit einer geringen Windungszahl eine hohe Induktivität er¬ reichen läßt. Dies führt zu einem langsamen Zündimpuls, und die Zündspannung kann gering gehalten werden. Weiter¬ hin ermöglicht die geringe Windungszahl einen kompakten und kl ei nvol umi gen Aufbau.According to an advantageous embodiment of the invention, an inductive ignition component contained in the ballast, in particular an ignition pulse transmitter, has a closed core, preferably a toroidal core, as a result of which a high inductance can be achieved with a small number of turns. This leads to a slow ignition pulse and the ignition voltage can be kept low. Furthermore, the low number of turns enables a compact and small volume structure.
Der geschlossene Kern umgreift vorzugsweise einen der beiden mit einer Elektrodendurchführung versehenen End¬ bereiche des Brennergefäßes, was ebenfalls zu einer Ver¬ ringerung der Baugröße beiträgt.The closed core preferably encompasses one of the two end regions of the burner vessel provided with an electrode leadthrough, which likewise contributes to a reduction in the size.
Durch Umspritzen oder Vergießen der für das Vorschaltgerät erforderlichen Bauelemente zusammen mit einem Endbereich des Brennergefäßes mit Kunststoffmaterial kann auf ein¬ fache und kostengünstige Weise ein Lampensockel gebildet werden, der neben seiner Aufgabe als Lampensockel noch die Bauelemente zusammenhält und an das Brennergefäß bindet. Dieser Lampensockel dient auch gleichzeitig als Isolier¬ körper, wobei zweckmäßigerweise die elektrischen Anschlüsse des Lampensockels ebenfalls mitumspritzt oder mitvergossen sind, so daß praktisch der gesamte Lampensockel in einem Arbeitsgang gebildet wird.By overmolding or potting the components required for the ballast together with an end area of the burner vessel with plastic material, a lamp base can be formed in a simple and inexpensive manner which, in addition to its function as a lamp base, also holds the components together and binds to the burner vessel. This lamp base also serves at the same time as an insulating body, the electrical connections of the lamp base also expediently being encapsulated or encapsulated, so that practically the entire lamp base is formed in one operation.
Die im vom Lampensockel entfernten Endbereich des Brenner¬ gefäßes angeordnete Elektrodendurchführung wird über eine äußere Leitung zum Lampensockel zurückgeführt und dort mit einem entsprechenden elektrischen Anschluß verbunden, was insgesamt zu einer einfachen und kostengünstigen Lösung führt, wobei der im Lampensockel verlaufende Bereich dieser äußeren Leitung selbstverständlich gleich mit¬ umspritzt bzw. mitumgossen werden kann.The electrode bushing arranged in the end region of the burner vessel remote from the lamp base is returned to the lamp base via an outer line and connected there with a corresponding electrical connection, which leads to a simple and inexpensive solution overall, the region of this outer line running in the lamp base of course being the same can be encapsulated or encapsulated.
Außer durch Reduzierung der Zündenergieverluste mittels kurzer Hochspannungsleitungen kann die Zündspannung in vorteilhafter Weise noch durch Anbringung einer Hilfs¬ elektrode verringert werden. Hierbei ist die äußere Leitung zweckmäßigerweise mit einer Hilfselektrode ver¬ bunden oder bildet eine solche, wobei diese Hilfselektrode vorzugsweise in der Nähe der sockelnahen ersten Haupt¬ elektrode angeordnet ist.In addition to reducing the ignition energy losses by means of short high-voltage lines, the ignition voltage can advantageously also be reduced by attaching an auxiliary electrode. In this case, the outer line is expediently connected to or forms an auxiliary electrode, this auxiliary electrode preferably being arranged in the vicinity of the first main electrode near the base.
Eine einfache Ferti gbarkei t und kostengünstige Lösung wird dadurch erreicht, daß die Hilfselektrode als außen am Brennergefäß anliegender Draht oder leitfähiger Streifen ausgebildet ist.A simple producibility and inexpensive solution is achieved in that the auxiliary electrode is designed as a wire or conductive strip lying on the outside of the burner vessel.
In einer weiteren vorteilhaften Ausgestaltung ist die Polarität der sockelnahen ersten Hauptelektrode negativ gegenüber der Polarität der anderen, mit der Hi 1 fsei ektro- de verbundenen zweiten Hauptelektrode. Dadurch wird sichergestellt, daß nach dem I ni ti al funken , der von der sockelnahen ersten Hauptelektrode zur Hilfselektrode springt, und zwar durch die Glaswandung des Brennergefäßes hindurch, der Folgefunken hin zur zweiten Hauptelektrode ohne Polaritätswechsel der ersten Hauptelektrode folgen kann .In a further advantageous embodiment, the polarity of the first main electrode near the base is negative with respect to the polarity of the other, with which the first electrode is electrically de connected second main electrode. This ensures that the spark that jumps from the first main electrode near the base to the auxiliary electrode, namely through the glass wall of the burner vessel, can follow the subsequent spark to the second main electrode without changing the polarity of the first main electrode.
ZEICHNUNGDRAWING
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:An embodiment of the invention is shown in the drawing and explained in more detail in the following description. Show it:
Fig. 1 eine Schnittdarstellung der mit einem Lampen¬ sockel versehenen Gasentladungslampe als Aus¬ fuhrungsbeispiel und1 shows a sectional illustration of the gas discharge lamp provided with a lamp base as an exemplary embodiment and
Fig. 2 eine mögliche Ausgestaltung eines Vorschalt- geräts .2 shows a possible configuration of a ballast.
BESCHREIBUNG DES AUSFÜHRUNGSBEISPIELSDESCRIPTION OF THE EMBODIMENT
Die in Fig. 1 dargestellte Gasentladungslampe besteht im wesentlichen aus einem Brennergefäß 10, das in einem Lampensockel 11 eingebettet ist. Das aus Glas oder einem anderen durchsichtigen, temperaturbeständigen Material bestehende Brennergefäß 10 besitzt einen zentralen Brenn¬ raum 12 mit abgeflachter Kugelgestalt bzw. Ellipsoid- gestalt, der an entgegengesetzten Seiten zwei rohrartige Fortsätze 13, 14 besitzt. Die Endbereiche dieser rohr¬ artigen Fortsätze 13, 14 sind als gasdichte Stromdurch¬ führungen für zwei Hauptelektroden 15, 16 ausgebildet, die sich von beiden Seiten her geringfügig in den Brenn¬ raum 12 hineinerstrecken. Zwischen diesen Hauptelektroden 15, 16 bildet sich im Betrieb der Lichtbogen aus. Der Lampensockel 11 ist als Gußkörper oder Spritzgußkörper ausgebildet und besteht aus isolierendem Kunststoff¬ material . Er enthält einen Zündimpulsübertrager 17, der aus einem Ringkern 18 und einer Wicklungsanordnung 24, 27 für den Ringkern 18 besteht. Der Riπgkern 18 umgreift konzentrisch den ersten rohrartigen Fortsatz 13, der sich in den Lampen¬ sockel 11 hineinerstreckt. Weiterhin sind im Lampensockel 11 elektronische Bauteile 19 enthalten, die lediglich schematisch dargestellt sind und die zusammen mit dem Zündimpulsübertrager 17 ein Vorschaltgerät bilden, das die Lampe mit der erforderl ichen Zünd- und Brennspannung versorgt.The gas discharge lamp shown in FIG. 1 essentially consists of a burner vessel 10 which is embedded in a lamp base 11. The burner vessel 10, which is made of glass or another transparent, temperature-resistant material, has a central combustion chamber 12 with a flattened spherical shape or ellipsoidal shape, which has two tubular extensions 13, 14 on opposite sides. The end regions of these tubular extensions 13, 14 are designed as gas-tight current feedthroughs for two main electrodes 15, 16, which extend slightly into the combustion chamber 12 from both sides. The arc forms during operation between these main electrodes 15, 16. The lamp base 11 is designed as a molded body or injection molded body and consists of insulating plastic material. It contains an ignition pulse transmitter 17, which consists of a toroidal core 18 and a winding arrangement 24, 27 for the toroidal core 18. The ring core 18 concentrically engages around the first tubular extension 13, which extends into the lamp base 11. Furthermore, the lamp base 11 contains electronic components 19, which are only shown schematically and which, together with the ignition pulse transformer 17, form a ballast which supplies the lamp with the required ignition and operating voltage.
Der Lampensockel 11 besitzt weiterhin zwei ringförmige elektrische Anschlüsse 20, 21, von denen der innere mit der ersten Hauptelektrode 15 und von denen der äußere mit dem ZündimpulsÜbertrager 17 verbunden ist. Ein zweiter Anschluß des ZündimpulsÜbertragers 17 ist mit einer äußeren Leitung 22 verbunden, die sich vom Lampensockel 11 aus im wesentlichen parallel zum Brennergefäß 10 erstreckt und an dessen freiem Ende mit der zweiten Hauptelektrode 16 elektrisch verbunden ist. Diese äußere Leitung 22 ist als Draht oder Stab ausgebildet. Im Verbindungsbereich zwischen dem ersten rohrartigen Fortsatz 13 und dem Brenn¬ raum 12 ist die äußere Leitung 22 zu diesem ersten Fort¬ satz 13 hin geführt und bildet dort eine äußere Hilfs¬ elektrode 23, die somit elektrisch mit der zweiten Haupt¬ elektrode 16 verbunden ist. Diese Hilfselektrode 23 kann auch als leitfähiger Streifen, z.B. als leitfähiger Lack¬ streifen aus Leitsilber od. dgl ., ausgebildet sein. Die Polarität der sockelnahen ersen Hauptelektrode 15 ist negativ gegenüber der Polarität der zweiten Hauptelektrode 16 und der Hilfselektrode 23, um sicherzustellen, daß nach dem Ini ti al funken , der von der Hauptelektrode 15 zur Hilfselektrode 23 durch das Glas hindurch springt, der Folgefunken hin bis zur zweiten Hauptelektrode 16 ohne Polaritätswechsel der Hauptelektrode 15 folgen kann.The lamp base 11 also has two ring-shaped electrical connections 20, 21, of which the inner one is connected to the first main electrode 15 and the outer one is connected to the ignition pulse transmitter 17. A second connection of the ignition pulse transmitter 17 is connected to an outer line 22 which extends from the lamp base 11 essentially parallel to the burner vessel 10 and is electrically connected at its free end to the second main electrode 16. This outer line 22 is designed as a wire or rod. In the connection area between the first tubular extension 13 and the combustion chamber 12, the outer line 22 leads to this first extension 13 and forms an outer auxiliary electrode 23 there, which is thus electrically connected to the second main electrode 16 . This auxiliary electrode 23 can also be designed as a conductive strip, for example as a conductive lacquer strip made of conductive silver or the like. The polarity of the first main electrode 15 near the base is negative with respect to the polarity of the second main electrode 16 and the auxiliary electrode 23, in order to ensure that after the initial spark that jumps through the glass from the main electrode 15 to the auxiliary electrode 23, the subsequent spark up to the second main electrode 16 without Polarity change of the main electrode 15 can follow.
Der Zündimpul s'übertrager 17, das Brennergefäß 10, die elektronischen Bauteile 19, die elektrischen Anschlüsse 20, 21 sowie die äußere Leitung 22 werden gemeinsam mit Kunststoffmaterial unter Bildung des Lampensockels 11 um¬ spritzt oder vergossen. Mit Hilfe des Lampensockels 11 kann die Lampe in eine Sockel aufnähme beispielsweise eines Kraftfahrzeug-Scheinwerfers eingesteckt werden.The ignition pulse s ' transmitter 17, the burner vessel 10, the electronic components 19, the electrical connections 20, 21 and the outer line 22 are molded or cast together with plastic material to form the lamp base 11. With the help of the lamp base 11, the lamp can be inserted into a base, for example of a motor vehicle headlight.
In Fig. 2 ist eine mögliche Schaltung für ein Vorschalt¬ gerät dargestellt. Die beiden elektrischen Anschlüsse 20, 21 sind über die Reihenschaltung einer ersten Wicklung 24 des Zündimpulsübertragers 17 mit den beiden Hauptelektro¬ den 15, 16 des Brennergefäßes 10 miteinander verbunden. Weiterhin sind die beiden elektrischen Anschlüsse 20, 21 über die Reihenschaltung eines Kondensators 25 mit einem Widerstand 26 verbunden. Parallel zum Kondensator 25 ist die Reihenschaltung einer zweiten Wicklung 27 des Zünd¬ impulsübertragers 17 mit einer Funkenstrecke 28 geschal¬ tet. Die in Fig. 2 dargestellte Schaltung stellt lediglich eine von vielen bekannten Möglichkeiten für ein solches Vorschaltgerät dar. Weitere Schaltungen für Vorschalt- geräte von Gasentladungslampen sind beispielsweise in "Lamps and Lighting", 2. Ausgabe, S. T. Henderson und A. M. Marsden, S. 328 ff, dargestellt und beschrieben. Aus der Vielzahl der dort dargestellten Schaltungen fü r Vor- schaltgeräte geht unter anderem auch hervor, daß der ZündimpulsÜbertrager 17 bei einigen Schaltungen auch als einfache Drossel bzw. Spule ausgebildet sein kann.2 shows a possible circuit for a ballast. The two electrical connections 20, 21 are connected to one another via the series connection of a first winding 24 of the ignition pulse transmitter 17 with the two main electrodes 15, 16 of the burner vessel 10. Furthermore, the two electrical connections 20, 21 are connected to a resistor 26 via the series connection of a capacitor 25. The series connection of a second winding 27 of the ignition pulse transformer 17 with a spark gap 28 is connected in parallel with the capacitor 25. The circuit shown in FIG. 2 represents only one of many known possibilities for such a ballast. Further circuits for ballasts of gas discharge lamps are, for example, in "Lamps and Lighting", 2nd edition, ST Henderson and AM Marsden, p. 328 ff, shown and described. From the large number of circuits for ballasts shown there, it is evident, among other things, that the ignition pulse transmitter 17 can also be designed as a simple choke or coil in some circuits.
In Abwandlung des dargestellten Ausführungsbeispiels kann der Lampensockel 11 auch als vorgefertigtes Gehäuse zur Aufnahme der Bauteile, wie Zündimpul s'übertrager 17, Brennergefäß 10, elektrische Bauteile 19, elektrische Anschlüsse 20, 21 und äußere Leitung 22, ausgebildet sein. Weiterhin kann auch nur ein Teil dieser Bauteile umspritzt bzw. vergossen sein, während ein anderer Teil in einem vorgefertigten Gehäuse untergebracht ist.In a modification of the embodiment shown, the lamp base 11 can also be as a prefabricated housing for receiving the components, such as Zündimpul s' exchangers 17, burner tube 10, electrical components 19, electrical connections 20, 21 and outer conduit 22 may be formed. Furthermore, only a part of these components can be encapsulated or encapsulated, while another part is housed in a prefabricated housing.
In einer einfacheren Ausführung kann die Hilfselektrode 23 auch entfallen, eine andere Gestalt aufweisen oder als separat mit einer Zündspannung beaufschlagte Elektrode ausgebildet sein. In a simpler embodiment, the auxiliary electrode 23 can also be omitted, have a different shape or be designed as an electrode which is supplied separately with an ignition voltage.

Claims

Ansprüche Expectations
1. Gasentladungslampe, insbesondere für Kraftfahrzeug- Scheinwerfer, mit einem wenigstens zwei Elektroden auf¬ weisenden Brennergefäß aus Glas od. dgl ., das mit einem die elektrischen Anschlüsse aufweisenden, in eine Sockel¬ aufnahme einsteckbaren Lampensockel versehen ist, und mit einem elektronischen, die Lampe mit der erforderlichen Zünd- und Brennspannung versorgenden Vorschaltgerät, dadurch gekennzeichnet, daß das Vorschaltgerät im Lampen¬ sockel (11) angeordnet ist.1. Gas discharge lamp, in particular for motor vehicle headlights, with a burner vessel made of glass or the like having at least two electrodes, which is provided with a lamp base which has the electrical connections and can be plugged into a base receptacle, and with an electronic base Lamp with the necessary ignition and operating voltage supply ballast, characterized in that the ballast is arranged in the lamp base (11).
2. Gasentladungslampe nach Anspruch 1, dadurch gekenn¬ zeichnet, daß ein im Vorschaltgerät enthaltenes induktives Zündbauteil (17), insbesondere ein Zündimpulsübertrager, einen geschlossenen Kern (18) besitzt.2. Gas discharge lamp according to claim 1, characterized gekenn¬ characterized in that an inductive ignition component (17) contained in the ballast, in particular an ignition pulse transmitter, has a closed core (18).
3. Gasentladungslampe nach Anspruch 2, dadurch gekenn¬ zeichnet, daß der geschlossene Kern (18) ein Ringkern ist.3. Gas discharge lamp according to claim 2, characterized gekenn¬ characterized in that the closed core (18) is a ring core.
4. Gasentladungslampe nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der geschlossene Kern (18) einen der beiden mit einer Elektrodendurchführung versehenen End¬ bereiche (13) des Brennergefäßes (10) umgreift.4. Gas discharge lamp according to claim 2 or 3, characterized in that the closed core (18) encompasses one of the two end regions (13) of the burner vessel (10) provided with an electrode bushing.
5. Gasentladungslampe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die für das Vorschaltgerät erforderlichen Bauelemente (17, 19) zu¬ sammen mit einem Endbereich (13) des Brennergefäßes (10) mit den Lampensockel (11) bildendem Kunststoffmateri al umspritzt oder vergossen sind.5. Gas discharge lamp according to one of the preceding claims, characterized in that for the Ballast required components (17, 19) together with an end region (13) of the burner vessel (10) with plastic material forming the lamp base (11) are molded or potted.
6. Gasentladungslampe nach Anspruch 5, dadurch gekenn¬ zeichnet, daß die elektrischen Anschlüssse (20, 21) des Lampensockels ebenfalls mitumspritzt oder mitvergossen sind.6. Gas discharge lamp according to claim 5, characterized gekenn¬ characterized in that the electrical connections (20, 21) of the lamp base are also encapsulated or cast.
7. Gasentladungslampe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die im vom Lampen¬ sockel (11) entfernten Endbereich (14) des Brennergefäßes (10) angeordnete Elektrodendurchführung über eine äußere Leitung (20) zum Lampensockel (11) zurückgeführt und dort mit einem entsprechenden elektrischen Anschluß verbunden ist.7. Gas discharge lamp according to one of the preceding claims, characterized in that the end of the lamp (11) (14) end region (14) of the burner vessel (10) arranged electrode lead through an outer line (20) to the lamp base (11) and returned there a corresponding electrical connection is connected.
8. Gasentladungslampe nach Anspruch 7, dadurch gekenn¬ zeichnet, daß die äußere Leitung (22) mit einer Hilfs¬ elektrode (23) verbunden ist oder eine solche bildet.8. A gas discharge lamp as claimed in claim 7, characterized in that the outer line (22) is connected to an auxiliary electrode (23) or forms one.
9. Gasentladungslampe nach Anspruch 8, dadurch gekenn¬ zeichnet, daß die Hilfselektrode (23) in der Nähe der sockelnahen ersten Hauptelektrode (15) angeordnet ist.9. The gas discharge lamp as claimed in claim 8, characterized in that the auxiliary electrode (23) is arranged in the vicinity of the first main electrode (15) near the base.
10. Gasentladungslampe nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Hilfselektrode (23) als außen am Brennergefäß (10) anliegender Draht oder leitfähiger Streifen ausgebildet ist.10. Gas discharge lamp according to claim 8 or 9, characterized in that the auxiliary electrode (23) as the outside of the burner vessel (10) adjacent wire or conductive strip is formed.
11. Gasentladungslampe nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß die Polarität der sockel¬ nahen ersten Hauptelektrode (15) negativ ist gegenüber der Polarität der anderen, mit der Hilfselektrode (23) verbundenen zweiten Hauptelektrode (16) . 11. Gas discharge lamp according to one of claims 8 to 10, characterized in that the polarity of the first main electrode (15) close to the base is negative compared to the polarity of the other second main electrode (16) connected to the auxiliary electrode (23).
12. Gasentladungslampe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Brennergefäß (10) im wesentlichen aus einem Brennraum (12) und zwei sich von diesem aus in entgegengesetzte Richtungen er¬ streckenden, je eine Hauptelektrode (15, 16) enthaltenden rohrartigen Fortsätzen (13, 14) besteht, wobei die ent¬ gegengesetzten Endbereiche der Fortsätze (13, 14) die Elektrodendurchführungen enthalten. 12. Gas discharge lamp according to one of the preceding claims, characterized in that the burner vessel (10) consists essentially of a combustion chamber (12) and two extending therefrom in opposite directions, each containing a main electrode (15, 16) tubular extensions (13, 14), the opposite end regions of the extensions (13, 14) containing the electrode bushings.
EP97916330A 1996-03-16 1997-03-06 Gas discharge lamp, in particular for a motor-vehicle headlight Expired - Lifetime EP0886882B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19610385A DE19610385A1 (en) 1996-03-16 1996-03-16 Gas discharge lamp, in particular for motor vehicle headlights
DE19610385 1996-03-16
PCT/DE1997/000425 WO1997035336A1 (en) 1996-03-16 1997-03-06 Gas discharge lamp, in particular for a motor-vehicle headlight

Publications (3)

Publication Number Publication Date
EP0886882A1 true EP0886882A1 (en) 1998-12-30
EP0886882B1 EP0886882B1 (en) 2000-05-31
EP0886882B2 EP0886882B2 (en) 2005-04-13

Family

ID=7788496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97916330A Expired - Lifetime EP0886882B2 (en) 1996-03-16 1997-03-06 Gas discharge lamp, in particular for a motor-vehicle headlight

Country Status (6)

Country Link
US (1) US6194834B1 (en)
EP (1) EP0886882B2 (en)
JP (1) JP2000506673A (en)
DE (2) DE19610385A1 (en)
ES (1) ES2148958T3 (en)
WO (1) WO1997035336A1 (en)

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Also Published As

Publication number Publication date
WO1997035336A1 (en) 1997-09-25
US6194834B1 (en) 2001-02-27
ES2148958T3 (en) 2000-10-16
DE59701814D1 (en) 2000-07-06
EP0886882B2 (en) 2005-04-13
EP0886882B1 (en) 2000-05-31
DE19610385A1 (en) 1997-09-18
JP2000506673A (en) 2000-05-30

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