EP2497103A1 - Lampe à décharge haute pression - Google Patents

Lampe à décharge haute pression

Info

Publication number
EP2497103A1
EP2497103A1 EP11701802A EP11701802A EP2497103A1 EP 2497103 A1 EP2497103 A1 EP 2497103A1 EP 11701802 A EP11701802 A EP 11701802A EP 11701802 A EP11701802 A EP 11701802A EP 2497103 A1 EP2497103 A1 EP 2497103A1
Authority
EP
European Patent Office
Prior art keywords
discharge
discharge lamp
pressure
lamp according
zündhilfsschicht
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
EP11701802A
Other languages
German (de)
English (en)
Other versions
EP2497103B1 (fr
Inventor
Marc Czichy
Dirk Grundmann
Melanie ZUMKLEY
Detlef Guenther
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 EP2497103A1 publication Critical patent/EP2497103A1/fr
Application granted granted Critical
Publication of EP2497103B1 publication Critical patent/EP2497103B1/fr
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
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/547—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode outside the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr

Definitions

  • the invention is based on a high-pressure discharge lamp according to the preamble of claim 1.
  • Document DE 10 2006 007 218 AI discloses such a high-pressure discharge lamp which is used, for example, for a motor vehicle headlight.
  • This has an elongated discharge vessel having a substantially centrally Entla ⁇ formation space from which two diametrically extending Quet ⁇ nant.
  • the discharge vessel is covered by a hollow cylindrical outer bulb. This is firmly inserted into a base of the high-pressure discharge lamp together with the discharge vessel.
  • In the discharge ⁇ each space from a squeezing forth two mutually opposite electrodes arranged, which serve to generate a gas discharge.
  • a respective electrode is electrically contacted by a respective end face of a tinct depending ⁇ pinching lead-out power supply.
  • the socket remote power supply extends approximately along the outer bulb to the base.
  • the discharge vessel has an electroconducting ⁇ hige coating, which serves as an ignition aid for lowering egg ⁇ ner ignition voltage of the high pressure discharge lamp.
  • the object of the present invention is to provide a high pressure discharge lamp which has a low ignition voltage hereby ⁇ se.
  • a high-pressure discharge lamp has a discharge vessel in which a discharge space is formed. To generate a gas discharge, two spaced-apart electrodes extend into the discharge space.
  • the discharge vessel is at least ⁇ portion, by an outer bulb embraced.
  • a filling gas is introduced as a starting aid.
  • the discharge vessel has an electrically conductive Zündos Mrs.
  • This solution has the advantage that the high-pressure discharge lamp having two starting aid for lowering the firing voltage the advantage.
  • the filling gas in the outer space generated at a Zün ⁇ dimpuls from an outer side of the discharge vessel, an electrically conductive layer or a plasma, are formed by the discharge space in the ignition assisting dielectrically impeded discharges.
  • photoelectrons are liberated from the plasma by UV emission, which serve as starting electrons for the formation of a discharge arc between the electrodes.
  • Another advantage in addition to the low ignition voltage is the high reliability of Hochdruckentla ⁇ tion lamp.
  • the ignition assist layer is simply deposited on an outer surface of the discharge vessel within the outer space.
  • a non-electrically conductive insulation layer for separating the filling gas and the Zündostik on the Zündins harsh ⁇ introduced .
  • the insulating layer has the further advantage that it protects the Zündins harsh against degeneration.
  • the insulating layer is a licht pressläs ⁇ sige glass layer, in particular a quartz glass layer.
  • a quartz glass layer is also mög ⁇ Lich.
  • this insulating layer only on the region bring ⁇ in which the Zündos Mrs is arranged to protect the Zündos Mrs from degeneration.
  • the insulation layer can therefore also be provided in Hoch réelleentla ⁇ tion lamps, in which the filling gas is not used in the outer space between the discharge vessel and outer bulb as a starting aid.
  • the insulating layer is applied in a cold process on the Zündins slaughter and on the discharge vessel.
  • the insulation layer is applied in the cold procedural ⁇ ren with a low-pressure plasma, wherein this comprises in particular hexamethyldisiloxane (HMDSO).
  • HMDSO hexamethyldisiloxane
  • the Zündanges Mrs is arranged in the region of the discharge space on the discharge vessel and extending over a portion of the periphery of the Ent ⁇ charge period.
  • the discharge vessel has two diametrically extending pinch ends and the Zündanges Mrs is at least partially applied to at least one pinch end.
  • the ignition ⁇ auxiliary layer can thus be adjusted so that the required ignition voltage is minimal.
  • the Zündostik may additionally be applied to at least one transition region between the discharge space and a respective pinch end sections or over the entire circumference. So that the filling gas in the outer space can contribute sufficiently to lowering the ignition voltage, this has a lowered compared to the standard atmospheric pressure, which is in particular between 300 mbar to 400 mbar, or in particular between 150 mbar to 200 mbar. As a particularly cost can be set as a filling gas air ⁇ .
  • a largest possible area layer or Plas ⁇ ma can form by the filling gas in the discharge vessel during ignition of the high pressure discharge lamp, all of the discharge vessel is enclosed by the outer bulb, and thus surrounded by the exterior space.
  • Figure 1 a side view of an inventive high ⁇ pressure discharge lamp according to a first exporting ⁇ approximately example.
  • FIG. 2 shows a side view of the high-pressure discharge lamp from FIG. 1 during ignition.
  • FIG. 3 shows a side view of the high-pressure discharge lamp from FIG. 1 during ignition
  • Fig. 4 is a side view of the inventive high ⁇ pressure discharge lamp according to a second exporting ⁇ approximately example
  • FIG. 1 shows a side view of a schematic representation of a high-pressure discharge lamp 1 according to a first exemplary embodiment. These are in ⁇ play as a D4 lamp for ahuischeinwer- fer. This can be mercury-free and has an electrical power consumption of about 35 watts.
  • the high-pressure discharge lamp 1 has a discharge vessel 2 made of quartz glass, which has two approximately diametrically arranged crushing eyes 4, 6. Approximately centrally between the Quet ⁇ nant 4, 6 log ent ⁇ long extending a lamp longitudinal axis of elongate, generally circular cylindrical discharge space 8 is introduced into the discharge vessel. 2 In the region of the discharge space 8, the discharge vessel 2 has an approximately ellipsoidal outer contour.
  • the Quet ⁇ shear 4, 6 are elongated and also extend approximately along the lamp longitudinal axis.
  • the discharge space 8 protrude from a respective pinch end 4 and 6 approximately along the lamp axis two spaced-apart electrodes 10 and 12 of tungsten, between which forms a light-emitting discharge arc during operation of the high-pressure discharge lamp 1.
  • the electrodes 10 and 12 are each ⁇ wells electrically connected to a pinching end in a respective 4 or 6 fused molybdenum foil 14 and 16 respectively.
  • the molybdenum foils 14 and 16 are each electrically connected to a power supply line 18 or 20 introduced in sections into the crimping end 4 and 6, respectively, at an end portion pointing away from the electrodes 10 and 12, respectively. These are arranged approximately along the lamp longitudinal axis and protrude from the front of the discharge vessel 2.
  • the discharge vessel 2 is at its in Figure 1 unte ⁇ ren pinch 6 with a tubular extension 22 in a substantially plastic existing Lam- pensockel 24 used.
  • the sockelnahe power supply 20 is guided through the extension 22 in the lamp base 24.
  • the socket remote power supply 18 is connected to a extending approximately along the discharge vessel 2 contact wire 26 which opens into the base 24.
  • the contact wire 26 is additionally partially covered by an approximately tubular insulation element 28 for electrical and thermal insulation.
  • the surface area of the discharge vessel 2 facing the contact wire 26 is provided with a light-transmitting, electrically conductive ignition aid layer 30. This extends approximately in the lamp longitudinal direction over the entire length of the discharge space 8 and about 5 to 50% in the circumferential direction around the discharge vessel 2.
  • the material and the embodiment of the Zündanges Mrs 30 corresponds for example to that in the above-mentioned document DE 10 2006 007 218 AI.
  • the discharge vessel 2 is encompassed with its pinch ends 4, 6 and the discharge space 8 of a glass, translucent tubular outer bulb 32 existing. At its sockelfernen end portion of the outer bulb 32 with the squeeze end 4 by a curl and at his ⁇ near end near the base with the extension 22 of the discharge vessel 2 by a constriction gas-tight merged. Between the discharge vessel 2 and the outer bulb 32 thus a gas-tight outer space 34 is formed in which, for example, air is introduced.
  • the pressure in the outer space 34 is less than a ⁇ StandardatmospPS rend ruck with about 1013 mbar and more preferably 300 to 400 mbar, or preferably 150 to 250 mbar. Un ⁇ ter these pressure conditions, the air in the outer space 34 additionally used as a starting aid in addition to the Zündos Mrs 30.
  • an insulation ⁇ layer 36 applied. This extends approximately over the entire circumferential area of the discharge vessel 2 arranged within the outer space 34.
  • the insulating layer 36 also protects the auxiliary ignition layer 30 from de ⁇ generation.
  • the insulating layer 36 is produced in a cold process, in order to avoid that the temperaturempfind ⁇ Liche Zündos Mrs 30 is damaged by high temperatures during manufacture.
  • the cold process is carried out with the aid of a low-pressure plasma.
  • the discharge vessel 2 in a vacuum chamber a substance in ⁇ game as hexamethyldisiloxane (HMDSO), for example, introduced via a carrier gas, argon, wherein the fabric is then excited by means of microwaves.
  • HMDSO hexamethyldisiloxane
  • By this method grows within seconds on the discharge vessel 2 tightly adherent and few nanometers di ⁇ blocks quartz glass layer as an insulating layer 36. This is due to the small thickness extremely elastic and therefore insensitive to mechanical stresses.
  • the process takes place at a temperature of less than 100 ° C.
  • the ignition voltage of the high-pressure discharge lamp increases with increasing filling pressure of the introduced in the discharge space 8 filling gas.
  • the Zündstik 30 and the filling gas in the outer space 34 is provided.
  • the for igniting the high pressure discharge lamp REQUIRED ⁇ chen high voltage pulses are supplied to the base-side electrode 12 via the power feeder 20, as this is encompassed completely by the discharge vessel 2 together with the extension 22 and the base 24, which leading an excellent electric insulation of the high tensioning ⁇ voltage parts the high pressure discharge lamp 1 ⁇ ensured ge.
  • the high-voltage pulses mentioned are generated, for example, by means of a pulse ignition device whose components can be arranged in the lamp base 24.
  • FIG. 2 shows a side view of the high-pressure discharge lamp 1 from FIG. 1 when an ignition voltage is applied. In this case, a positive ignition pulse is applied to the lower electrode 12 in FIG.
  • the filling gas forms in the outer space 34 between the Wennkol ⁇ ben 32 and the discharge vessel 2 by the ignition pulse to an electrically conductive layer or a plasma 37 at a peripheral portion of the discharge vessel 2 from.
  • the plasma 37 extends asymmetrically around the discharge vessel 2 in the region of the discharge space 8 and the lower crimp end 6 in FIG. 2 and is shown in dashed lines.
  • the plasma 37 has the same effect as the Zündostik 30 and thus forms together with the lower electrode 12 in Figure 2 a capacitor.
  • 37 photoelectrons are formed by the plasma due to a UV emission, which serve as Startelekt ⁇ rons for the discharge arc between the electrodes 10, 12.
  • a disadvantage of the plasma 37 in the outer space 34 is that it can only occur under a lower pressure compared to the standard atmospheric pressure. Equals the pressure in the outer space 34, for example due to cracks in the outer bulb 32 that occur during manufacture, is the external pressure, then no plasma 37 is formed when an ignition voltage is applied to the high-pressure discharge lamp 1. However, since the high-pressure discharge lamp 1 as an ignition aid has zusharm ⁇ Lich the Zündostik 30, even with a not forming plasma 37, the firing voltage is lowered, which ensures a high operating reliability of the high pressure discharge lamp. 1 The insulation results in layer 36 in this case acts only as protection ⁇ layer which protects the Zündistik 30 from degeneration.
  • Figure 3 illustrates in a side view illustrates the high-pressure discharge lamp 1 of Figure 1, in which an ignition voltage is applied with a negative ignition pulse to the near-socket electric ⁇ de that corresponds in Figure 2, the electrode 12.
  • the plasma 37 forms on the outer circumference of the upper crimp end 4 of the discharge vessel 2.
  • the electrically conductive plasma 37 thus provides, together with the Zündos Mrs 30 an asymmetric ignition aid available.
  • FIG. 4 shows a side view of the high-pressure discharge lamp 1 according to a second exemplary embodiment.
  • the Zündzstik 30 is installed ⁇ tet differently. This has here an upper and lower legs 38 and 40, each along a squeezing 4 or 6 extend.
  • the legs 38 and 40 are arranged approximately in the region between the molybdenum foils 14 and 16 and extending along the discharge vessel 2 contact wire 26 in the lamp longitudinal direction on the squeezing 4 and 6 and surround these sections in the circumferential direction.
  • the Zündyll 30 is on a surface of a transition region 42 and 44 between a respective crimp end 4 and 6 and the discharge space 8 comprising the central region of the discharge vessel 2.
  • the transition regions 42 and 44 are annular groove-like, with the Zündostik 30 then over the entire circumference of the transition regions 42, 44 extends.
  • the Zündystik according to the second embodiment of the invention thus has a arranged in the discharge space layer portion 30, two arranged in the ringnutierin transition areas layer sections 42, 44 and two on the Quet ⁇ ends 4, 6 arranged layer sections 38, 40.
  • the aforementioned layer sections form a related ignition aid layer.
  • the Zündos slaughter 30 formed in the figure 1 has a smaller area compared to the layer portion 30 of the Zündos slaughter from the figure 4. As a result, a larger-area distribution of the plasma 37 around the outer circumference of the discharge vessel 2 is made possible.

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L'invention concerne une lampe à décharge haute pression comportant une enceinte à décharge dans laquelle est formé un espace de décharge, deux électrodes situées à une certaine distance l'une de l'autre s'étendant dans l'espace de décharge pour générer une décharge dans le gaz. L'enceinte à décharge est entourée, au moins par endroits, d'une ampoule extérieure. Un gaz de remplissage est introduit en tant qu'auxiliaire d'allumage dans un espace extérieur étanche aux gaz au moins délimité par l'enceinte à décharge et par l'ampoule extérieure. En outre, l'enceinte à décharge comporte une couche auxiliaire d'allumage électroconductrice.
EP11701802.8A 2010-01-26 2011-01-25 Lampe à décharge haute pression Not-in-force EP2497103B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010001209 DE102010001209A1 (de) 2010-01-26 2010-01-26 Hochdruckentladungslampe
PCT/EP2011/050928 WO2011092146A1 (fr) 2010-01-26 2011-01-25 Lampe à décharge haute pression

Publications (2)

Publication Number Publication Date
EP2497103A1 true EP2497103A1 (fr) 2012-09-12
EP2497103B1 EP2497103B1 (fr) 2017-01-18

Family

ID=43901106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11701802.8A Not-in-force EP2497103B1 (fr) 2010-01-26 2011-01-25 Lampe à décharge haute pression

Country Status (5)

Country Link
EP (1) EP2497103B1 (fr)
JP (1) JP2013518375A (fr)
CN (1) CN102725820A (fr)
DE (1) DE102010001209A1 (fr)
WO (1) WO2011092146A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011103862U1 (de) * 2011-07-29 2011-10-24 Osram Ag Hochdruckentladungslampe
DE202011103945U1 (de) * 2011-08-01 2011-11-03 Osram Ag Hochdruckentladungslampe mit Zündhilfe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1764866A1 (de) * 1968-08-21 1971-11-18 Patra Patent Treuhand Anordnung zur Wiederzuendung einer betriebswarmen Quecksilberdampf-Hochdruckentladungslampe mit Zusaetzen
US6110544A (en) * 1997-06-26 2000-08-29 General Electric Company Protective coating by high rate arc plasma deposition
WO2001082332A1 (fr) * 2000-04-26 2001-11-01 Cornell Research Foundation, Inc. Lampe utilisant des fibres pour champ de depart renforce
US6538377B1 (en) * 2000-11-03 2003-03-25 General Electric Company Means for applying conducting members to arc tubes
WO2006085162A1 (fr) * 2005-01-03 2006-08-17 Philips Intellectual Property & Standards Gmbh Lampe a decharge gazeuse
JP2007042369A (ja) * 2005-08-02 2007-02-15 Harison Toshiba Lighting Corp メタルハライドランプおよび照明装置
DE102006007218A1 (de) 2006-02-15 2007-08-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
WO2008007284A2 (fr) * 2006-07-07 2008-01-17 Koninklijke Philips Electronics N. V. Lampe à décharge gazeuse
ATE489723T1 (de) * 2006-07-07 2010-12-15 Koninkl Philips Electronics Nv Gasentladungslampe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011092146A1 *

Also Published As

Publication number Publication date
DE102010001209A1 (de) 2011-07-28
JP2013518375A (ja) 2013-05-20
CN102725820A (zh) 2012-10-10
WO2011092146A1 (fr) 2011-08-04
EP2497103B1 (fr) 2017-01-18

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