EP2499651A1 - High-pressure discharge lamp having a single socket - Google Patents

High-pressure discharge lamp having a single socket

Info

Publication number
EP2499651A1
EP2499651A1 EP10775799A EP10775799A EP2499651A1 EP 2499651 A1 EP2499651 A1 EP 2499651A1 EP 10775799 A EP10775799 A EP 10775799A EP 10775799 A EP10775799 A EP 10775799A EP 2499651 A1 EP2499651 A1 EP 2499651A1
Authority
EP
European Patent Office
Prior art keywords
discharge
pressure discharge
lamp
discharge lamp
base
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
EP10775799A
Other languages
German (de)
French (fr)
Other versions
EP2499651B1 (en
Inventor
Jürgen Becker
Florian Bedynek
Kilian Klages
Karsten Pietsch
Matthias Protsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
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 EP2499651A1 publication Critical patent/EP2499651A1/en
Application granted granted Critical
Publication of EP2499651B1 publication Critical patent/EP2499651B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base

Definitions

  • the invention relates to a high-pressure discharge lamp ge ⁇ Frankfurtss the preamble of claim 1.
  • Such high-pressure discharge lamp is beispielswei ⁇ se in WO 2008/071543 AI revealed.
  • This document describes a single-ended high-pressure discharge lamp for a vehicle headlamp, wherein the high-pressure discharge lamp has the following features:
  • a discharge vessel which has two mutuallysupervisedlie ⁇ constricting sealed ends and a disposed between the off-compacted ends of the discharge space, wherein a first sealed end is extending into a lamp base and projecting from the second sealed end of the lamp base,
  • Discharge space extending discharge side end has,
  • the high-pressure discharge lamp according to the invention has
  • a discharge vessel which has two mutuallysupervisedlie ⁇ constricting sealed ends and a disposed between the substitute ⁇ compacted ends of the discharge space, wherein a first sealed end is extending into a lamp base and projecting the second sealed end of the lamp base,
  • a first electrode fixed in the first sealed end of the discharge vessel and having a discharge side end extending into the discharge space
  • a second electrode fixed in the second sealed end of the discharge vessel and having a discharge side end extending into the discharge space
  • the high pressure discharge lamp according to the invention is characterized in that the distance A of the discharge-side end of the first electrode to the plane of the base ⁇ flange and of the distance B of the discharge-side end of the second electrode to the plane of the base flange, the following relationship applies:
  • the erfindungsge ⁇ Permitted high pressure discharge lamp has a low so-called Light-Center-Length, that is, a small distance between the discharge arc center of gravity and the reference ⁇ plane of the base flange, which is dung sheet used for alignment of the Entla ⁇ with respect to the vehicle headlight reflector.
  • the size (A + B) / 2 which serves as a measure for the Light-Center-Length, less than or equal 27.0 mm, in order to use the high-pressure discharge lamp according to the invention in reflectors flat construction.
  • the size (A + B) / 2 is greater than or equal to 15.0 mm in order to be able to use the usual technology for high-pressure discharge lamps of the invention for the base and the lamp vessel holder of the high-pressure discharge lamp according to the invention.
  • the lamp cap and the lamp vessel holding the high pressure discharge lamp Invention ⁇ can be used for the lamp cap and the lamp vessel holding the high pressure discharge lamp Invention ⁇ according to the same materials as in generic high pressure discharge lamp turned ⁇ sets, as in the case of the aforementioned condition for the size (A + B) 2, an excessively high operating temperatures occur / in the inventive high-pressure discharge lamp.
  • the lower limit is for the value the size (A + B) / 2 still large enough to avoid shading effects by a lamp vessel holder, which is located in the region of the first sealed end.
  • the sealed ends of the discharge vessel each have a tubular extension in order to fasten an outer bulb surrounding the discharge vessel.
  • the tubular extensions allow due to their circular cylindrical shape a simple fixing of the outer bulb on the discharge vessel by the heated and softened outer bulb material is pressed by means of rollers to the tubular ⁇ like projections and merged.
  • the Au ⁇ terkolben serves as bursting and splinter protection and for absorption of ultraviolet radiation.
  • the outer bulb for this purpose consists of hard glass or quartz glass, which is ver ⁇ see with ultraviolet radiation absorbing additives such as titanium oxide and cerium oxide.
  • tubular extension of the first sealed end of the discharge vessel and the outer bulb advantageously extend into the lamp base, so that a power supply for the first electrode is surrounded by the tubular extension and the outer piston, and the length C of a protruding from the outer bulb Section of the tubular extension of the first sealed end of the discharge vessel has a value in the Be ⁇ range of 1.0 mm to 11.0 mm.
  • the distance of the protruding from the reiteratekol ⁇ ben portion of the tubular extension of the first sealed end of the discharge vessel to the lamp base in the longitudinal direction of the discharge vessel as low as possible, for example, less than or equal to 2 mm, to the best possible Hochwoodsisolie ⁇ tion of the power supply for the first electrode to ensure against arranged in the base metal parts.
  • the base flange of ferti ⁇ supply technical reasons of plastic and preferably of the same plastic as the lamp cap.
  • lamp base and base flange can be produced as a plastic injection-molded part in the same process step.
  • Polyphenylene sulfide and polyetherimide are preferably suitable as plastics for the lamp base and the base flange.
  • the distance BA between the discharge-side ends of the Electrodes at a value in the range of 3.0 mm to 3, 9 mm to provide a light source that comes as close to the ideal of a point light source for imaging in the vehicle headlight on the one hand and on the other hand, a sufficient illuminance made ⁇ light.
  • the curvature of the discharge vessel wall and the distance BA are formed such that the optical distance of the discharge-side electrode ends has a value in the range of 3.6 mm to 4.2 mm in order to provide a light ⁇ source, the one for imaging in the vehicle headlight the ideal of a point-like light source comes as close as possible and on the other hand allows sufficient illuminance.
  • the high pressure discharge lamp is designed as a metal-halide high-pressure discharge lamp containing at least xenon and halides of the metals sodium and scandium in Entla ⁇ formation space.
  • the aforementioned filling components of a high pressure discharge lamp enabling the emitting of white light immediately after ignition of the gas discharge in the high pressure discharge lamp, so that the high-pressure discharge lamp ⁇ ⁇ spotlights used as a light source in a vehicle.
  • the inventions dung modern high pressure discharge lamp is designed as a vehicle registration ⁇ bowler lamp operating in quasi-stationary Be ⁇ , that is, after their ignition and start-up ⁇ phase, has an electrical power of from 20 watts to 35 watts.
  • the figure shows a cross section through a high-pressure discharge lamp according to the preferred embodiment of the invention. It is in this high-pressure discharge lamp to a mercury-free metal-halide high-pressure discharge lamp with an electrical nominal Leis ⁇ processing of 25 watts. Xenon and halides of the metals sodium, scandium, indium and zinc serve as the discharge medium for the gas discharge.
  • This lamp has a discharge vessel soffittenartiges 100 made of quartz glass with a gas-tight Ent ⁇ loading chamber 110, a first sealed end near the base 120 and a base-remote second sealed end 130.
  • a discharge vessel soffittenartiges 100 made of quartz glass with a gas-tight Ent ⁇ loading chamber 110, a first sealed end near the base 120 and a base-remote second sealed end 130.
  • In the discharge space 110 protrude two electrodes
  • the lamp base has a base made of a plastic injection-molded part base sleeve 400, in which the discharge vessel 100 and a so strigze ⁇ ner outer piston 50 are anchored.
  • the remote from the discharge vessel 100 the end 410 of base sleeve 400 is constructed as a plug with two electrical contacts 61, 62nd
  • the center contact 61 is connected in an electrically conductive manner to the power supply line 22 led out from the socket-sealed first end 120, while the other, ring-shaped electrical contact 62 is connected via one of a Ceramic tube 34 sheathed return 33 is electrically connected to the protruding from the second second sealed end 130 of the discharge vessel 100 outstanding current ⁇ feed 32 is connected.
  • the discharge vessel 100 is surrounded by a cylindrical, virtually coaxially with the discharge vessel 100 disposed outer bulb 50th
  • the outer bulb 50 is fused to a tubular extension 131 of the socket-distal second sealed end 130 and a tubular extension 121 of the socket-like first sealed end 120 of the discharge vessel 100 extending into the base sleeve 400.
  • the tubular extensions 121, 131 are formed circular cylindrical.
  • To anchor the two lamp vessels 100 and 50 in the cylindrical base sleeve 400 serve an annular Halter ter terelement 70 which surrounds the outer piston 50 with a clamping fit, and four angled metal tabs 71, the first end is welded to the holder member 70 and the second end respectively is anchored in the plastic material of the base sleeve 400.
  • the base sleeve 400 has at its end remote from the electrical contacts an annular flange 420 having an end face 421 which is arranged perpendicular to the longitudinal axis of the high ⁇ pressure discharge lamp and serves as a reference plane for alignment of the lamp in the headlight. At this end face, the base sleeve 400 has an increased wall thickness. In this area, the second ends of the metal tabs 71 are anchored in the wall of the base sleeve 400 on its inside.
  • the distance A of the discharge-side end of the socket-like first electrode 20 to the end face 421 is 17.1 mm.
  • the Light Center Length (A + B) / 2 is therefore 18.85 mm.
  • the distance BA between the discharge-soapy ends of the electrodes 20, 30 is 3.5 mm.
  • the optically effective distance of the discharge-side ends of the electrodes 20, 30 depends on the refractive index and the curvature of the wall of the discharge vessel 100 in the region of the discharge space 103 and is in the range from 3.6 mm to 4.2 mm.
  • the length C of the protruding from the outer bulb 50 portion of the tubular extension of the socket near the first sealed end 101 of the discharge vessel 100 is 1.0 mm.
  • the distance of the projecting from the outer portion 122 of the piston 50 rohrar- term extension 121 of the base near the first sealed end 120 of the discharge vessel 100 to the bottom 411 of the So ⁇ ckelhülse 400 is 1.0 mm.
  • the invention is not limited to the above-explained embodiment of the invention.
  • the invention also components of an ignition device for igniting the gas discharge in the high-pressure discharge lamp or Comp ⁇ components of an operating device or circuit arrangement are arranged to operate the high pressure discharge lamp in the socket.

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

The invention relates to a high-pressure discharge lamp having a single socket, comprising a discharge vessel (100) having two opposite sealed ends (120, 130) and a discharge chamber (110) disposed between the sealed ends (120, 130), wherein a first sealed end (120) extends into a lamp base (400) and the second sealed end (130) protrudes out of the lamp base (400), a first electrode (20) fixed in the first sealed end (120) of the discharge vessel (100) and having an end on the discharge side extending into the discharge chamber (110), a second electrode fixed in the second sealed end (130) of the discharge vessel (100) and having an end extending into the discharge chamber (110), and a base flange (420) disposed on the base (400) and defining a plane (421) that can be used for adjusting the high-pressure discharge lamp in an optical system, wherein the following relationship applies for the distance A from the end of the first electrode (20) on the discharge side to the plane (421) of the base flange (420) and the distance B from the end of the second electrode (30) on the discharge side to the plane (421) of the base flange (420): (I).

Description

Einseitig gesockelte Hochdruckentladungslampe  Single ended high pressure discharge lamp
Die Erfindung betrifft eine Hochdruckentladungslampe ge¬ mäß dem Oberbegriff des Patentanspruchs 1. The invention relates to a high-pressure discharge lamp ge ¬ Mäss the preamble of claim 1.
I . Stand der Technik I. State of the art
Eine derartige Hochdruckentladungslampe ist beispielswei¬ se in der WO 2008/071543 AI offenbart. Diese Schrift be- schreibt eine einseitig gesockelte Hochdruckentladungs¬ lampe für einen Fahr zeugscheinwer fer , wobei die Hochdruckentladungslampe folgende Merkmale aufweist: Such high-pressure discharge lamp is beispielswei ¬ se in WO 2008/071543 AI revealed. This document describes a single-ended high-pressure discharge lamp for a vehicle headlamp, wherein the high-pressure discharge lamp has the following features:
ein Entladungsgefäß, das zwei einander gegenüberlie¬ gende abgedichtete Enden und einen zwischen den abge- dichteten Enden angeordneten Entladungsraum besitzt, wobei ein erstes abgedichtetes Ende in einen Lampenso¬ ckel erstreckt ist und das zweite abgedichtete Ende aus dem Lampensockel herausragt, a discharge vessel which has two mutually gegenüberlie ¬ constricting sealed ends and a disposed between the off-compacted ends of the discharge space, wherein a first sealed end is extending into a lamp base and projecting from the second sealed end of the lamp base,
eine erste Elektrode, die im ersten abgedichteten Ende des Entladungsgefäßes fixiert ist und ein sich in den a first electrode, which is fixed in the first sealed end of the discharge vessel and a in the
Entladungsraum erstreckendes entladungsseitiges Ende besitzt, Discharge space extending discharge side end has,
eine zweite Elektrode, die im zweiten abgedichteten Ende des Entladungsgefäßes fixiert ist und ein sich in den Entladungsraum erstreckendes entladungsseitiges a second electrode fixed in the second sealed end of the discharge vessel and a discharge side extending into the discharge space
Ende besitzt, und Owns end, and
einen Sockelflansch, der am Lampensockel angeordnet ist und eine Ebene definiert, die zur Justage der Hochdruckentladungslampe in einem optischen System verwendbar ist. I I . Darstellung der Erfindung a pedestal flange disposed on the lamp cap and defining a plane usable for adjusting the high pressure discharge lamp in an optical system. II. Presentation of the invention
Es ist Aufgabe der Erfindung, eine gattungsgemäße Hoch¬ druckentladungslampe bereitzustellen, die als Lichtquelle für Reflektoren flacher Bauweise geeignet ist und diesel¬ be Bauart wie eine gattungsgemäße Hochdruckentladungslam- pe aufweist. It is an object of the invention to provide a generic high ¬ discharge lamp, which is suitable as a light source for reflectors flat design and diesel ¬ be type as a generic high-pressure discharge lamp has pe.
Diese Aufgabe wird erfindungsgemäß durch eine einseitig gesockelte Hochdruckentladungslampe mit den Merkmalen aus dem Patentanspruch 1 gelöst. Besonders vorteilhafte Aus¬ führungen der Erfindung sind in den abhängigen Patentan- Sprüchen beschrieben. This object is achieved by a single-ended high-pressure discharge lamp with the features of claim 1. Particularly advantageous from ¬ guides of the invention are described in the dependent patent claims sayings.
Die erfindungsgemäße Hochdruckentladungslampe besitzt The high-pressure discharge lamp according to the invention has
ein Entladungsgefäß, das zwei einander gegenüberlie¬ gende abgedichtete Enden und einen zwischen den abge¬ dichteten Enden angeordneten Entladungsraum aufweist, wobei ein erstes abgedichtetes Ende in einen Lampenso¬ ckel erstreckt ist und das zweite abgedichtete Ende aus dem Lampensockel herausragt, a discharge vessel which has two mutually gegenüberlie ¬ constricting sealed ends and a disposed between the abge ¬ compacted ends of the discharge space, wherein a first sealed end is extending into a lamp base and projecting the second sealed end of the lamp base,
eine erste Elektrode, die im ersten abgedichteten Ende des Entladungsgefäßes fixiert ist und ein sich in den Entladungsraum erstreckendes entladungsseitiges Ende aufweist,  a first electrode fixed in the first sealed end of the discharge vessel and having a discharge side end extending into the discharge space,
eine zweite Elektrode, die im zweiten abgedichteten Ende des Entladungsgefäßes fixiert ist und ein sich in den Entladungsraum erstreckendes entladungsseitiges Ende aufweist, und  a second electrode fixed in the second sealed end of the discharge vessel and having a discharge side end extending into the discharge space, and
einen Sockelflansch, der am Lampensockel angeordnet ist und eine Ebene definiert, die zur Justage der Hochdruckentladungslampe in einem optischen System verwendbar ist. Die erfindungsgemäße Hochdruckentladungslampe zeichnet sich dadurch aus, dass für den Abstand A des entladungs- seitigen Endes der ersten Elektrode zur Ebene des Sockel¬ flansches und für den Abstand B des entladungsseitigen Endes der zweiten Elektrode zur Ebene des Sockelflansches die folgende Beziehung gilt: a pedestal flange disposed on the lamp cap and defining a plane usable for adjusting the high pressure discharge lamp in an optical system. The high pressure discharge lamp according to the invention is characterized in that the distance A of the discharge-side end of the first electrode to the plane of the base ¬ flange and of the distance B of the discharge-side end of the second electrode to the plane of the base flange, the following relationship applies:
A+B A + B
15,0mm < < 27,0mm  15.0mm <<27.0mm
2  2
Durch diese Elektrodenanordnung besitzt die erfindungsge¬ mäße Hochdruckentladungslampe eine geringe sogenannte Light-Center-Length, das heißt, einen geringen Abstand zwischen dem Entladungsbogenschwerpunkt und der Referenz¬ ebene des Sockelflansches, die zur Ausrichtung des Entla¬ dungsbogens bezüglich des Fahrzeugscheinwerferreflektors verwendet wird. Insbesondere ist die Größe (A+B)/2, die als Maß für die Light-Center-Length dient, kleiner oder gleich 27,0 mm, um die erfindungsgemäße Hochdruckentla¬ dungslampe in Reflektoren flacher Bauweise einsetzen zu können. Andererseits ist die Größe (A+B)/2 größer oder gleich 15,0 mm, um für den Sockel und die Lampengefäßhal- terung der erfindungsgemäßen Hochdruckentladungslampe die bei gattungsgemäßen Hochdruckentladungslampen übliche Technik nutzen zu können. Insbesondere können für den Lampensockel und die Lampengefäßhalterung der erfindungs¬ gemäßen Hochdruckentladungslampe dieselben Materialien wie bei gattungsgemäßen Hochdruckentladungslampe einge¬ setzt werden, da im Fall vorgenannten Bedingung für die Größe (A+B)/2 bei der erfindungsgemäßen Hochdruckentladungslampe keine übermäßig hohen Betriebstemperaturen auftreten. Außerdem ist die untere Grenze für den Wert der Größe (A+B)/2 noch ausreichend groß, um Abschattungs- effekte durch eine Lampengefäßhalterung zu vermeiden, die im Bereich des ersten abgedichteten Endes angeordnet ist. By this electrode arrangement, the erfindungsge ¬ Permitted high pressure discharge lamp has a low so-called Light-Center-Length, that is, a small distance between the discharge arc center of gravity and the reference ¬ plane of the base flange, which is dung sheet used for alignment of the Entla ¬ with respect to the vehicle headlight reflector. In particular, the size (A + B) / 2, which serves as a measure for the Light-Center-Length, less than or equal 27.0 mm, in order to use the high-pressure discharge lamp according to the invention in reflectors flat construction. On the other hand, the size (A + B) / 2 is greater than or equal to 15.0 mm in order to be able to use the usual technology for high-pressure discharge lamps of the invention for the base and the lamp vessel holder of the high-pressure discharge lamp according to the invention. In particular, can be used for the lamp cap and the lamp vessel holding the high pressure discharge lamp Invention ¬ according to the same materials as in generic high pressure discharge lamp turned ¬ sets, as in the case of the aforementioned condition for the size (A + B) 2, an excessively high operating temperatures occur / in the inventive high-pressure discharge lamp. Also, the lower limit is for the value the size (A + B) / 2 still large enough to avoid shading effects by a lamp vessel holder, which is located in the region of the first sealed end.
Vorzugsweise besitzen die abgedichteten Enden des Entla- dungsgefäßes jeweils einen rohrartigen Fortsatz, um daran einen das Entladungsgefäß umgebenden Außenkolben zu befestigen. Die rohrartigen Fortsätze ermöglichen aufgrund ihrer kreiszylindrischen Form ein einfaches Fixieren des Außenkolbens am Entladungsgefäß, indem das erhitzte und erweichte Außenkolbenmaterial mittels Rollen an die rohr¬ artigen Fortsätze gedrückt und verschmolzen wird. Der Au¬ ßenkolben dient als Berst- und Splitterschutz sowie zur Absorption von ultravioletter Strahlung. Beispielsweise besteht der Außenkolben zu diesem Zweck aus Hartglas oder Quarzglas, das mit ultraviolette Strahlung absorbierenden Zusätzen, wie beispielsweise Titanoxid und Ceroxid, ver¬ sehen ist. Preferably, the sealed ends of the discharge vessel each have a tubular extension in order to fasten an outer bulb surrounding the discharge vessel. The tubular extensions allow due to their circular cylindrical shape a simple fixing of the outer bulb on the discharge vessel by the heated and softened outer bulb material is pressed by means of rollers to the tubular ¬ like projections and merged. The Au ¬ ßenkolben serves as bursting and splinter protection and for absorption of ultraviolet radiation. For example, the outer bulb for this purpose consists of hard glass or quartz glass, which is ver ¬ see with ultraviolet radiation absorbing additives such as titanium oxide and cerium oxide.
Außerdem erstrecken sich der rohrartige Fortsatz des ersten abgedichteten Endes des Entladungsgefäßes und der Au- ßenkolben vorteilhafterweise in den Lampensockel hinein, so dass eine Stromzuführung für die erste Elektrode von dem rohrartigen Fortsatz und dem Außenkolben umgeben ist, und die Länge C eines aus dem Außenkolben herausragenden Abschnitts des rohrartigen Fortsatzes des ersten abge- dichteten Endes des Entladungsgefäßes einen Wert im Be¬ reich von 1,0 mm bis 11,0 mm besitzt. Dadurch ist gewährleistet, dass zum Einen die Stromzuführung für die erste Elektrode mittels des vorgenannten rohrartigen Fortsatzes und des Außenkolbens gegen Metallteile im Sockel elekt- risch isoliert ist und zum Anderen aufgrund des ver- gleichsweise kurzen, aus dem Außenkolben herausragenden Abschnitts des rohrartigen Fortsatzes des ersten abge¬ dichteten Endes des Entladungsgefäßes zur Erzielung einer möglichst geringen Light-Center-Length keine Änderungen an den bestehenden Fertigungsanlagen vorgenommen werden müssen, da Außenkolben, Entladungsraum und Molybdänfolienabdichtungen in den Enden des Entladungsgefäßes identisch zu den entsprechenden Teilen einer herkömmlichen, gattungsgemäßen Hochdruckentladungslampe sind. Zur Ferti- gung der erfindungsgemäßen Hochdruckentladungslampen können daher die Fertigungsanlagen der konventionellen gattungsgemäßen Hochdruckentladungslampen genutzt werden. Vorteilhafterweise ist der Abstand des aus dem Außenkol¬ ben herausragenden Abschnitts des rohrartigen Fortsatzes des ersten abgedichteten Endes des Entladungsgefäßes zum Lampensockel in Längserstreckungsrichtung des Entladungsgefäßes möglichst gering, beispielsweise kleiner oder gleich 2 mm, um eine möglichst gute Hochspannungsisolie¬ rung der Stromzuführung für die erste Elektrode gegen im Sockel angeordnete Metallteile zu gewährleisten. In addition, the tubular extension of the first sealed end of the discharge vessel and the outer bulb advantageously extend into the lamp base, so that a power supply for the first electrode is surrounded by the tubular extension and the outer piston, and the length C of a protruding from the outer bulb Section of the tubular extension of the first sealed end of the discharge vessel has a value in the Be ¬ range of 1.0 mm to 11.0 mm. This ensures that, on the one hand, the power supply for the first electrode is electrically insulated against metal parts in the base by means of the abovementioned tubular extension and the outer bulb, and Similarly short, protruding from the outer bulb portion of the tubular extension of the first abge ¬ sealed end of the discharge vessel to achieve the lowest possible Light Center Length no changes to the existing manufacturing facilities must be made because outer bulb, discharge chamber and Molybdänfolienabdichtungen in the ends of the discharge vessel are identical to the corresponding parts of a conventional, generic high-pressure discharge lamp. To manufacture the high-pressure discharge lamps according to the invention, therefore, the production facilities of the conventional generic high-pressure discharge lamps can be used. Advantageously, the distance of the protruding from the Außenkol ¬ ben portion of the tubular extension of the first sealed end of the discharge vessel to the lamp base in the longitudinal direction of the discharge vessel as low as possible, for example, less than or equal to 2 mm, to the best possible Hochspannungsisolie ¬ tion of the power supply for the first electrode to ensure against arranged in the base metal parts.
Vorteilhafterweise besteht der Sockelflansch aus ferti¬ gungstechnischen Gründen aus Kunststoff und vorzugsweise aus demselben Kunststoff wie der Lampensockel. Dadurch können Lampensockel und Sockelflansch als Kunststoff- spritzgussteil im selben Verfahrensschritt hergestellt werden. Vorzugsweise eignen sich als Kunststoffe für den Lampensockel und den Sockelflansch Polyphenylensulfid und Polyetherimid . Advantageously, the base flange of ferti ¬ supply technical reasons of plastic and preferably of the same plastic as the lamp cap. As a result, lamp base and base flange can be produced as a plastic injection-molded part in the same process step. Polyphenylene sulfide and polyetherimide are preferably suitable as plastics for the lamp base and the base flange.
Bei der erfindungsgemäßen Hochdruckentladungslampe liegt der Abstand B-A zwischen den entladungsseitigen Enden der Elektroden bei einem Wert im Bereich von 3,0 mm bis 3, 9 mm, um eine Lichtquelle bereitzustellen, die für die Abbildung im Fahrzeugscheinwerfer einerseits dem Ideal einer punktförmigen Lichtquelle möglichst nahe kommt und andererseits eine ausreichende Beleuchtungsstärke ermög¬ licht . In the high-pressure discharge lamp according to the invention, the distance BA between the discharge-side ends of the Electrodes at a value in the range of 3.0 mm to 3, 9 mm to provide a light source that comes as close to the ideal of a point light source for imaging in the vehicle headlight on the one hand and on the other hand, a sufficient illuminance made ¬ light.
Vorzugsweise sind die Krümmung der Entladungsgefäßwand und der Abstand B-A derart ausgebildet, dass der optische Abstand der entladungsseitigen Elektrodenenden einen Wert im Bereich von 3,6 mm bis 4,2 mm besitzt, um eine Licht¬ quelle bereitzustellen, die für die Abbildung im Fahrzeugscheinwerfer einerseits dem Ideal einer punktförmigen Lichtquelle möglichst nahe kommt und andererseits eine ausreichende Beleuchtungsstärke ermöglicht. Gemäß dem bevorzugten Ausführungsbeispiel der Erfindung ist die Hochdruckentladungslampe als Halogen-Metalldampf- Hochdruckentladungslampe ausgebildet, die zumindest Xenon und Halogenide der Metalle Natrium und Scandium im Entla¬ dungsraum enthält. Die vorgenannten Füllungsbestandteile einer Hochdruckentladungslampe ermöglichen das Emittieren von weißem Licht unmittelbar nach der Zündung der Gasentladung in der Hochdruckentladungslampe, so dass die Hoch¬ druckentladungslampe als Lichtquelle in einem Fahrzeug¬ scheinwerfer einsetzbar ist. Vorzugsweise ist die erfin- dungsgemäße Hochdruckentladungslampe als Fahrzeugschein¬ werferlampe ausgebildet, die im quasi-stationären Be¬ trieb, das heißt nach Beendigung ihrer Zünd- und Anlauf¬ phase, eine elektrische Leistungsaufnahme im Bereich von 20 Watt bis 35 Watt besitzt. III. Beschreibung des bevorzugten AusführungsbeispielsPreferably, the curvature of the discharge vessel wall and the distance BA are formed such that the optical distance of the discharge-side electrode ends has a value in the range of 3.6 mm to 4.2 mm in order to provide a light ¬ source, the one for imaging in the vehicle headlight the ideal of a point-like light source comes as close as possible and on the other hand allows sufficient illuminance. According to the preferred embodiment of the invention, the high pressure discharge lamp is designed as a metal-halide high-pressure discharge lamp containing at least xenon and halides of the metals sodium and scandium in Entla ¬ formation space. The aforementioned filling components of a high pressure discharge lamp enabling the emitting of white light immediately after ignition of the gas discharge in the high pressure discharge lamp, so that the high-pressure discharge lamp ¬ ¬ spotlights used as a light source in a vehicle. Preferably, the inventions dung modern high pressure discharge lamp is designed as a vehicle registration ¬ bowler lamp operating in quasi-stationary Be ¬, that is, after their ignition and start-up ¬ phase, has an electrical power of from 20 watts to 35 watts. III. Description of the Preferred Embodiment
Nachstehend wird die Erfindung anhand eines bevorzugten Ausführungsbeispiels näher erläutert. The invention will be explained in more detail below with reference to a preferred embodiment.
Die Figur zeigt einen Querschnitt durch eine Hochdruckentladungslampe gemäß dem bevorzugten Ausführungsbeispiel der Erfindung. Es handelt sich bei dieser Hochdruckentla¬ dungslampe um eine quecksilberfreie Halogen-Metalldampf- Hochdruckentladungslampe mit einer elektrischen Nennleis¬ tung von 25 Watt. Als Entladungsmedium für die Gasentladung dienen Xenon und Halogenide der Metalle Natrium, Scandium, Indium und Zink. The figure shows a cross section through a high-pressure discharge lamp according to the preferred embodiment of the invention. It is in this high-pressure discharge lamp to a mercury-free metal-halide high-pressure discharge lamp with an electrical nominal Leis ¬ processing of 25 watts. Xenon and halides of the metals sodium, scandium, indium and zinc serve as the discharge medium for the gas discharge.
Diese Lampe besitzt ein soffittenartiges Entladungsgefäß 100 aus Quarzglas mit einem gasdicht verschlossenen Ent¬ ladungsraum 110, einem sockelnahen ersten abgedichteten Ende 120 und einem sockelfernen zweiten abgedichteten Ende 130. In den Entladungsraum 110 ragen zwei ElektrodenThis lamp has a discharge vessel soffittenartiges 100 made of quartz glass with a gas-tight Ent ¬ loading chamber 110, a first sealed end near the base 120 and a base-remote second sealed end 130. In the discharge space 110 protrude two electrodes
20, 30 hinein, die jeweils über eine im abgedichteten Ende 120 bzw. 130 gasdicht eingeschmolzene Molybdänfolie20, 30 in each case via a sealed in the sealed end 120 or 130 molybdenum foil
21, 31 mit einer aus dem abgedichteten Ende 120, 130 herausgeführten Stromzuführung 22, 32 elektrisch leitend verbunden sind. Der Lampensockel weist eine aus einem Kunststoff-Spritzgussteil bestehende Sockelhülse 400 auf, in dem das Entladungsgefäß 100 und ein damit verschmolze¬ ner Außenkolben 50 verankert sind. Das vom Entladungsge¬ fäß 100 abgewandte Ende 410 der Sockelhülse 400 ist als Stecker mit zwei elektrischen Kontakten 61, 62 ausgebildet. Der Mittenkontakt 61 ist mit der aus dem sockelnahen ersten abgedichteten Ende 120 herausgeführten Stromzuführung 22 elektrisch leitend verbunden, während der andere, ringförmige elektrische Kontakt 62 über eine von einem Keramikrohr 34 ummantelte Rückführung 33 elektrisch leitend mit der aus dem sockelfernen zweiten abgedichteten Ende 130 des Entladungsgefäßes 100 herausragenden Strom¬ zuführung 32 verbunden ist. Das Entladungsgefäß 100 ist von einem zylindrischen, nahezu koaxial zum Entladungsge¬ fäß 100 angeordneten Außenkolben 50 umgeben. Der Außenkolben 50 ist mit einem rohrartigen Fortsatz 131 des sockelfernen zweiten abgedichteten Endes 130 und einem sich in die Sockelhülse 400 erstreckenden, rohrförmigen Fort- satz 121 des sockelnahen ersten abgedichteten Endes 120 des Entladungsgefäßes 100 verschmolzen. Die rohrartigen Fortsätze 121, 131 sind kreiszylindrisch ausgebildet. Zur Verankerung der beiden Lampengefäße 100 und 50 in der zylindrischen Sockelhülse 400 dienen ein ringförmiges Hal- terelement 70, das mit Klemmsitz den Außenkolben 50 umschließt, und vier abgewinkelte Metalllaschen 71, deren erstes Ende jeweils mit dem Halterelement 70 verschweißt ist und deren zweites Ende jeweils in dem Kunststoffmate- rial der Sockelhülse 400 verankert ist. Die Sockelhülse 400 besitzt an ihrem von den elektrischen Kontakten abgewandten Ende einen ringartigen Flansch 420 mit einer Stirnfläche 421, die senkrecht zur Längsachse der Hoch¬ druckentladungslampe angeordnet ist und als Referenzebene zur Ausrichtung der Lampe im Scheinwerfer dient. An die- ser Stirnseite besitzt die Sockelhülse 400 eine erhöhte Wandstärke. In diesem Bereich sind die zweiten Enden der Metalllaschen 71 in der Wand der Sockelhülse 400 an ihrer Innenseite verankert. 21, 31 are electrically conductively connected to a led out of the sealed end 120, 130 power supply 22, 32. The lamp base has a base made of a plastic injection-molded part base sleeve 400, in which the discharge vessel 100 and a so verschmolze ¬ ner outer piston 50 are anchored. The remote from the discharge vessel 100 the end 410 of base sleeve 400 is constructed as a plug with two electrical contacts 61, 62nd The center contact 61 is connected in an electrically conductive manner to the power supply line 22 led out from the socket-sealed first end 120, while the other, ring-shaped electrical contact 62 is connected via one of a Ceramic tube 34 sheathed return 33 is electrically connected to the protruding from the second second sealed end 130 of the discharge vessel 100 outstanding current ¬ feed 32 is connected. The discharge vessel 100 is surrounded by a cylindrical, virtually coaxially with the discharge vessel 100 disposed outer bulb 50th The outer bulb 50 is fused to a tubular extension 131 of the socket-distal second sealed end 130 and a tubular extension 121 of the socket-like first sealed end 120 of the discharge vessel 100 extending into the base sleeve 400. The tubular extensions 121, 131 are formed circular cylindrical. To anchor the two lamp vessels 100 and 50 in the cylindrical base sleeve 400 serve an annular Halter ter terelement 70 which surrounds the outer piston 50 with a clamping fit, and four angled metal tabs 71, the first end is welded to the holder member 70 and the second end respectively is anchored in the plastic material of the base sleeve 400. The base sleeve 400 has at its end remote from the electrical contacts an annular flange 420 having an end face 421 which is arranged perpendicular to the longitudinal axis of the high ¬ pressure discharge lamp and serves as a reference plane for alignment of the lamp in the headlight. At this end face, the base sleeve 400 has an increased wall thickness. In this area, the second ends of the metal tabs 71 are anchored in the wall of the base sleeve 400 on its inside.
Der Abstand A des entladungsseitigen Endes der sockelna- hen ersten Elektrode 20 zur Stirnfläche 421 beträgt 17,1 mm. Der Abstand B des entladungsseitigen Endes der sockelfernen zweiten Elektrode 30 zur Stirnfläche 421 be¬ trägt 20,6 mm. Die Light-Center-Length (A+B)/2 beträgt somit 18,85 mm. Der Abstand B-A zwischen den entladungs- seifigen Enden der Elektroden 20, 30 beträgt 3,5 mm. Der optisch wirksame Abstand der entladungsseitigen Enden der Elektroden 20, 30 hängt von dem Brechungs index und der Krümmung der Wand des Entladungsgefäßes 100 im Bereich des Entladungsraums 103 ab und liegt im Wertebereich von 3,6 mm bis 4,2 mm. Die Länge C des aus dem Außenkolben 50 herausragenden Abschnitts des rohrartigen Fortsatzes des sockelnahen ersten abgedichteten Endes 101 des Entladungsgefäßes 100 beträgt 1,0 mm. Der Abstand des aus dem Außenkolben 50 herausragenden Abschnitts 122 des rohrar- tigen Fortsatzes 121 des sockelnahen ersten abgedichteten Endes 120 des Entladungsgefäßes 100 zum Boden 411 der So¬ ckelhülse 400 beträgt 1,0 mm. The distance A of the discharge-side end of the socket-like first electrode 20 to the end face 421 is 17.1 mm. The distance B of the discharge-side end of the socket-remote second electrode 30 to the end face 421 be ¬ contributes 20.6 mm. The Light Center Length (A + B) / 2 is therefore 18.85 mm. The distance BA between the discharge-soapy ends of the electrodes 20, 30 is 3.5 mm. The optically effective distance of the discharge-side ends of the electrodes 20, 30 depends on the refractive index and the curvature of the wall of the discharge vessel 100 in the region of the discharge space 103 and is in the range from 3.6 mm to 4.2 mm. The length C of the protruding from the outer bulb 50 portion of the tubular extension of the socket near the first sealed end 101 of the discharge vessel 100 is 1.0 mm. The distance of the projecting from the outer portion 122 of the piston 50 rohrar- term extension 121 of the base near the first sealed end 120 of the discharge vessel 100 to the bottom 411 of the So ¬ ckelhülse 400 is 1.0 mm.
Die Erfindung beschränkt sich nicht auf das oben näher erläuterte Ausführungsbeispiel der Erfindung. Beispiels- weise kann die Erfindung auch auf einseitig gesockelte Hochdruckentladungslampen angewandt werden, in deren Sockel Komponenten einer Zündvorrichtung zum Zünden der Gasentladung in der Hochdruckentladungslampe oder Kompo¬ nenten einer Betriebsvorrichtung bzw. Schaltungsanordnung zum Betreiben der Hochdruckentladungslampe angeordnet sind . The invention is not limited to the above-explained embodiment of the invention. Eg, can be applied to single-ended high pressure discharge lamps, the invention also components of an ignition device for igniting the gas discharge in the high-pressure discharge lamp or Comp ¬ components of an operating device or circuit arrangement are arranged to operate the high pressure discharge lamp in the socket.

Claims

Ansprüche  claims
Einseitig gesockelte Hochdruckentladungslampe mitSingle ended high pressure discharge lamp with
- einem Entladungsgefäß (100), das zwei einander gegenüberliegende abgedichtete Enden (120, 130) und einen zwischen den abgedichteten Enden (120, 130) angeordneten Entladungsraum (110) besitzt, wobei ein erstes abgedichtetes Ende (120) in ei¬ nen Lampensockel (400) erstreckt ist und das zweite abgedichtete Ende (130) aus dem Lampenso¬ ckel (400) herausragt, - A discharge vessel (100) having two opposite sealed ends (120, 130) and a between the sealed ends (120, 130) arranged discharge space (110), wherein a first sealed end (120) in ei ¬ nen lamp base ( 400) is extended and the second sealed end (130) of the lamp base (400) protrudes,
- einer ersten Elektrode (20), die im ersten abge¬ dichteten Ende (120) des Entladungsgefäßes (100) fixiert ist und ein sich in den Entladungsraum (110) erstreckendes entladungsseitiges Ende be¬ sitzt, - a first electrode (20) in the first abge ¬ compacted end (120) of the discharge vessel (100) is fixed and located in the discharge space (110) extending discharge side end ¬ be seated,
- einer zweiten Elektrode (30), die im zweiten ab¬ gedichteten Ende (130) des Entladungsgefäßes (100) fixiert ist und ein sich in den Entladungs¬ raum (110) erstreckendes entladungsseitiges Ende besitzt, - a second electrode (30) (100) is fixed in the second from ¬ sealed end (130) of the discharge vessel and has a space in the discharge ¬ (110) extending discharge-side end,
- einem Sockelflansch (420), der am Lampensockel angeordnet (400) ist und eine Ebene (421) defi¬ niert, die zur Justage der Hochdruckentladungs¬ lampe in einem optischen System verwendbar ist, dadurch gekennzeichnet, dass - a base flange (420) which is arranged at the lamp cap (400) and a plane (421) defi ned ¬ which is useful for adjusting the high-pressure discharge lamp in an optical system, characterized in that
für den Abstand A des entladungs seitigen Endes der ersten Elektrode (20) zur Ebene (421) des Sockel¬ flansches (420) und für den Abstand B des entla- dungsseitigen Endes der zweiten Elektrode (30) zur Ebene (421) des Sockelflansches (420) die folgende Beziehung gilt: for the distance A of the discharge-side end of the first electrode (20) to the plane (421) of the base ¬ flange (420) and for the distance B of the discharge-side end of the second electrode (30) Level (421) of the base flange (420) the following relationship applies:
A+B  A + B
15,0mm 27,0mm  15.0mm 27.0mm
2  2
Einseitig gesockelte Hochdruckentladungslampe nach Anspruch 1, wobei die abgedichteten Enden (120, Single ended high pressure discharge lamp after Claim 1, wherein the sealed ends (120, 120)
130) jeweils einen rohrartigen Fortsatz (121, 131) besitzen und ein das Entladungsgefäß (100) umgeben¬ der Außenkolben (50) auf den rohrartigen Fortsätzen (121, 131) fixiert ist. 3. Einseitig gesockelte Hochdruckentladungslampe nach Anspruch 2, wobei der rohrartige Fortsatz (121) des ersten abgedichteten Endes (120) und der Außenkol¬ ben (50) sich in den Lampensockel (400) hinein erstrecken, so dass eine erste Stromzuführung (22) für die erste Elektrode (20) von dem rohrartigen Fortsatz (121) und dem Außenkolben (50) umgeben ist, und wobei die Länge C eines aus dem Außenkol¬ ben (50) herausragenden Abschnitts (122) des rohrartigen Fortsatzes (121) des ersten abgedichteten Endes (120) einen Wert im Bereich von 1,0 mm bis 11,0 mm besitzt . 130) each having a tubular extension (121, 131) and a discharge vessel (100) surrounded ¬ the outer piston (50) on the tubular extensions (121, 131) is fixed. 3. The single-ended high-pressure discharge lamp according to claim 2, wherein the tubular extension (121) of the first sealed end (120) and the outer bulb (50) extend into the lamp base (400), so that a first power supply (22) for the first electrode (20) is surrounded by the tubular extension (121) and the outer piston (50), and wherein the length C of a portion (122) protruding from the outer piston (50) of the tubular extension (121) of the first sealed one End (120) has a value in the range of 1.0 mm to 11.0 mm.
Einseitig gesockelte Hochdruckentladungslampe nach einem der Ansprüche 1 bis 3, wobei der Sockel¬ flansch (420) aus Kunststoff besteht. 5. Einseitig gesockelte Hochdruckentladungslampe nach einem der Ansprüche 1 bis 4, wobei der Lampensockel (400) aus Kunststoff besteht. Einseitig gesockelte Hochdruckentladungslampe nach einem der Ansprüche 1 bis 5, wobei der Abstand B-A zwischen den entladungsseitigen Enden der Elektroden (20, 30) bei einem Wert im Bereich von 3,2 mm bis 3,8 mm liegt. Single-ended high-pressure discharge lamp according to one of claims 1 to 3, wherein the base ¬ flange (420) consists of plastic. 5. Single-ended high-pressure discharge lamp according to one of claims 1 to 4, wherein the lamp cap (400) consists of plastic. A single ended high pressure discharge lamp according to any one of claims 1 to 5, wherein the distance BA between the discharge side ends of the electrodes (20, 30) is in a range of 3.2 mm to 3.8 mm.
Einseitig gesockelte Hochdruckentladungslampe nach einem der Ansprüche 1 bis 6, wobei der optische Ab¬ stand zwischen den entladungsseitigen Enden der Elektroden (20, 30) bei einem Wert im Bereich zwischen 3,6 mm und 4,2 mm liegt. Unilaterally capped high-pressure discharge lamp according to one of claims 1 to 6, wherein the optical Ab ¬ stand between the discharge-side ends of the electrodes (20, 30) at a value in the range between 3.6 mm and 4.2 mm.
Einseitig gesockelte Hochdruckentladungslampe nach einem der Ansprüche 1 bis 7, wobei die Hochdruck¬ entladungslampe eine Halogen-Metalldampf-Hochdruckentladungslampe ist, die zumindest Xenon und Halo¬ genide der Natrium und Scandium im Entladungsraum enthält . Unilaterally capped high-pressure discharge lamp according to one of claims 1 to 7, wherein the high-pressure ¬ discharge lamp is a metal halide high-pressure discharge lamp containing at least xenon and Halo ¬ genide of sodium and scandium in the discharge space.
Einseitig gesockelte Hochdruckentladungslampe nach einem der Ansprüche 1 bis 8 ausgebildet als Fahr¬ zeugscheinwerferlampe mit einer elektrischen Leis¬ tungsaufnahme im Bereich von 20 Watt bis 35 Watt. Single-ended high-pressure discharge lamp according to one of claims 1 to 8 designed as a driving ¬ zeugscheinwerferlampe with an electric power ¬ tion recording in the range of 20 watts to 35 watts.
EP10775799.9A 2009-11-10 2010-11-02 High-pressure discharge lamp having a single socket Not-in-force EP2499651B1 (en)

Applications Claiming Priority (2)

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DE102009052624A DE102009052624A1 (en) 2009-11-10 2009-11-10 Single ended high pressure discharge lamp
PCT/EP2010/066637 WO2011057916A1 (en) 2009-11-10 2010-11-02 High-pressure discharge lamp having a single socket

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CN102584183B (en) * 2012-01-31 2014-04-02 杨潮平 Two-piece ceramic bulb shell and manufacturing method thereof
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US8502449B2 (en) 2013-08-06
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WO2011057916A1 (en) 2011-05-19
CN102598193B (en) 2015-09-16

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