EP0700579B1 - Hochdruckentladungslampe und herstellungsverfahren für eine hochdruckentladungslampe - Google Patents

Hochdruckentladungslampe und herstellungsverfahren für eine hochdruckentladungslampe Download PDF

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Publication number
EP0700579B1
EP0700579B1 EP94916137A EP94916137A EP0700579B1 EP 0700579 B1 EP0700579 B1 EP 0700579B1 EP 94916137 A EP94916137 A EP 94916137A EP 94916137 A EP94916137 A EP 94916137A EP 0700579 B1 EP0700579 B1 EP 0700579B1
Authority
EP
European Patent Office
Prior art keywords
outer bulb
quartz glass
discharge vessel
discharge lamp
pressure discharge
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.)
Expired - Lifetime
Application number
EP94916137A
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German (de)
English (en)
French (fr)
Other versions
EP0700579A1 (de
Inventor
Christian Wittig
Dieter Lang
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
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0700579A1 publication Critical patent/EP0700579A1/de
Application granted granted Critical
Publication of EP0700579B1 publication Critical patent/EP0700579B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels
    • H01J9/265—Sealing together parts of vessels specially adapted for gas-discharge tubes or lamps
    • H01J9/266—Sealing together parts of vessels specially adapted for gas-discharge tubes or lamps specially adapted for gas-discharge lamps

Definitions

  • the invention relates to a high-pressure discharge lamp according to the preamble of claim 1 and a method for producing a high-pressure discharge lamp.
  • it is a high-pressure discharge lamp that is used for an optical imaging system, such as is suitable for a motor vehicle headlight.
  • EP-A 0 570 068 discloses such a lamp, which corresponds to the preamble of patent claim 1. It serves as a light source for a motor vehicle headlight.
  • This high-pressure discharge lamp has a discharge vessel made of quartz glass which is sealed on two sides and sealed by means of melted-in molybdenum, with two axially aligned electrodes which are each melted into one end of the discharge vessel.
  • An outer bulb made of quartz glass surrounds the discharge vessel.
  • FIG. 3 of this laid-open document shows a high-pressure discharge lamp with an essentially rotationally symmetrical outer bulb which is arranged coaxially with the discharge vessel and is fused to the sealed ends of the discharge vessel outside the molybdenum melting films.
  • EP-A 0 465 083 also describes a high-pressure discharge lamp falling under the preamble of patent claim 1.
  • This high-pressure discharge lamp has a discharge vessel made of quartz glass which is sealed on two sides and sealed by means of melted-in molybdenum, with two axially aligned electrodes which are each melted into one end of the discharge vessel.
  • Outside of the melted down Molybdenum foils each have a plate-like thickening with which an outer bulb made of quartz glass and surrounding the discharge vessel is fused in a gas-tight manner.
  • This type of outer bulb fixation on the discharge vessel by means of the plate-like thickenings is comparatively complex.
  • these plate-like thickenings must also be at a sufficient distance from the melted-in molybdenum foils in order not to endanger the sealing of the discharge vessel.
  • the patent US Pat. No. 5,196,759 discloses a high-pressure discharge lamp which is equipped with a tubular discharge vessel and a tubular outer bulb.
  • the outer bulb consists of quartz glass doped with additives that absorb ultraviolet rays. It surrounds the discharge vessel without contact. The ends of the outer bulb are sealed by means of melted-down molybdenum foil via the current leads protruding from the discharge vessel.
  • the Canadian laid-open specification CA 2,026,850 describes a high-pressure discharge lamp provided with an outer bulb, the discharge vessel of which is arranged obliquely to the longitudinal axis or outside the longitudinal axis of the outer bulb, in order to ensure an optimum light output as a function of the position of the discharge vessel and of the reflector type.
  • the high-pressure discharge lamps according to the invention are equipped with an outer bulb, the glass of which has a lower viscosity and thus a has a lower softening temperature than the quartz glass of the discharge vessel.
  • an outer bulb the glass of which has a lower viscosity and thus a has a lower softening temperature than the quartz glass of the discharge vessel.
  • the outer bulb is made of a so-called soft quartz glass provided with viscosity-reducing additives, while the thermally more highly stressed discharge vessel consists of undoped quartz glass.
  • Soft quartz glasses Compared to pure, undoped quartz glass (silica content of approx. 99.99 mole percent), they have a softening range at significantly lower temperatures and are therefore easier and more energy-efficient to process than pure quartz glass. Examples of such soft quartz glasses, which can advantageously be used as outer bulb glass, are disclosed in EP-A-0 601 391 (Art. 54 (3)). Alkaline earth metal borates in quartz glass are primarily used as viscosity-reducing dopants.
  • the outer bulb glass also contains additives of rare earth metal compounds which reduce the transparency of the outer bulb glass in the ultraviolet spectral range in order to reduce the UV emission of the high-pressure discharge lamp. Since these rare earth metal compounds absorbing UV rays themselves reduce the viscosity of the outer bulb glass, a sufficient amount of rare earth metal compounds in the outer bulb glass, ie with a weight fraction of these rare earth metal compounds of more than approx. 5 percent by weight, possibly the initially mentioned viscosity-reducing alkaline earth metal borates can be dispensed with.
  • the simple outer bulb attachment to the discharge vessel has a particularly advantageous effect in the case of high-pressure discharge lamps used in motor vehicle headlights, because no additional holder or frame parts are necessary here, which can lead to impairment of the light emission.
  • High-pressure discharge lamps used in motor vehicle headlights are usually in a horizontal position, i. that is, operated with a horizontally extending discharge path, so that the discharge arc experiences a convection-related sickle-like upward curvature in the earth's gravitational field.
  • the axis of symmetry of the essentially rotationally symmetrical outer bulb of the high-pressure discharge lamp according to the invention is arranged parallel to the connecting path of the discharge-side electrode ends.
  • the amount of the parallel shift corresponds approximately to the mean deflection of the discharge arc from the fictitious connecting section of the electrode ends. In this way it is ensured that the outer bulb wall does not produce mirror images of the curved discharge arc, which would cause disturbing reflections in the reflector and would lead to loss of light.
  • the outer bulb axis advantageously runs through the brightness center or maximum of the discharge arc, which is used for the imaging system.
  • the deflection of the discharge arc from the discharge path, that is the connecting path between the discharge-side ends of the electrodes about 0.3 mm to 1.0 mm.
  • the eccentric position of the outer bulb with respect to the connecting section of the discharge-side electrode ends or with respect to the discharge vessel axis - usually the electrodes run in the discharge vessel axis - can be ensured relatively simply by fixing the outer bulb and discharge vessel in eccentrically arranged chucks of a glass lathe when the outer bulb melts.
  • FIG. 1a the two electrodes 3 are arranged horizontally and lie in the axis AA of the outer bulb 1.
  • the ends of the electrodes 3 which face one another on the discharge side define a discharge path lying in the outer bulb axis AA.
  • a discharge arc 4 which is curved upward due to convection is formed between the ends of the electrodes 3 on the discharge side.
  • the outer bulb wall generates a real mirror image 4a of the discharge arc 4 below the axis AA, which leads to light losses and disturbing reflections when such a lamp is used in an imaging system.
  • FIG. 1b shows the arrangement of outer bulb 1 and electrodes 3 in a high-pressure discharge lamp according to the invention.
  • the electrodes 3 are arranged eccentrically in the outer bulb 1, so that the discharge path runs parallel to the outer bulb axis A-A, but does not coincide with it.
  • the distance of the electrodes or the discharge path to the outer bulb axis is chosen so that the outer bulb axis A-A runs through the center of brightness or maximum brightness of the discharge arc and the real mirror image 4a is largely coincident with the discharge arc 4.
  • the brightness center or maximum of the discharge arc 4 coincides with its mirror image.
  • the brightness center or maximum is the location on the center perpendicular between the two discharge-side electrode ends that has the highest luminance in the discharge arc 4.
  • FIG. 1 A high-pressure discharge lamp according to the invention is shown in FIG.
  • This exemplary embodiment is a metal halide lamp with a base on one side and an electrical power consumption of approximately 35 watts, which is preferably used in motor vehicle headlights.
  • This lamp has an essentially axially symmetrical, two-sided sealed discharge vessel 2, which is surrounded by an essentially rotationally symmetrical outer bulb 1.
  • the discharge vessel 2 has a discharge space with an ionizable filling enclosed in a gas-tight manner therein, as well as two opposing squeezing ends 5a, 5b, in each of which an axially arranged electrode 3 projecting into the discharge space is melted.
  • Both electrodes 3 are each electrically conductively connected to a power supply 7a, 7b via a molybdenum foil melt 6.
  • the outer bulb 1 is fastened directly on the pinch seals 5a, 5b of the discharge vessel 2, in the immediate vicinity of the end of the molybdenum foils 6 facing away from the discharge space. It consists of 1.0 percent by weight barium metaborate (BaB 2 O 4 ), 0.5 Weight percent ceraluminate (CeAlO 3 ), 0.5 weight percent praseodymium oxide (Pr 6 O 11 ) and 0.05 weight percent titanium oxide (TiO 2 ) doped quartz glass.
  • the discharge vessel 2 is made of undoped quartz glass and is fixed in the lamp base 9 by means of a tubular extension 8a of the pinch end 5a.
  • the power supply 7a close to the base runs inside the tubular extension 8a and makes electrical contact with one of the two connection cables 10, while the power supply 7b remote from the base is electrically conductively connected to the other connection cable 10 via a return 11, which has ceramic insulation.
  • This lamp is operated in a horizontal position, i.e. with a horizontal discharge path.
  • the lamp is oriented so that the return 11 runs below the outer bulb 1 (Fig. 2).
  • the outer bulb 1 is arranged eccentrically with respect to the discharge vessel 2 and with respect to the discharge path, which is defined by electrode ends on the discharge side.
  • the outer bulb axis A-A runs approx. 0.65 mm above and parallel to the discharge vessel axis and to the discharge path.
  • the distance between the outer bulb axis A-A and the discharge path or the discharge vessel axis B-B is exaggerated for clarity.
  • FIGS. 3a and 3b illustrate the production method of a high-pressure discharge lamp according to the invention, in particular the assembly of the outer bulb 1.
  • a completely prefabricated, essentially axially symmetrical discharge vessel 2 made of undoped quartz glass and a circular cylindrical, with 1.0 percent by weight barium metaborate ( BaB 2 O 4 ), 0.5 percent by weight of ceraluminate (CeAlO 3 ), 0.5 percent by weight of praseodymium oxide (Pr 6 O 11 ) and quartz glass tube 1 doped with 0.05 percent by weight of titanium oxide (TiO 2 ).
  • the discharge vessel 2 has two gas-tightly closed squeezing ends 5a, 5b and two axially running electrodes 3, each of which is electrically conductively connected to a power supply 7a, 7b via a molybdenum foil melt 6. Both power supply lines each run within a tubular extension 8a, 8b of the crimp ends 5a, 5b.
  • the quartz glass tube 1 is threaded onto the discharge vessel 2.
  • the discharge vessel 2 is held on the tubular extension 8a of the crimping end 5a in a first chuck 12a of a glass lathe, while a counter bearing 13 supports the discharge vessel 2 on the other tubular extension 8b.
  • the glass tube 1 is fixed together with a base 14, a washer, in a second chuck 12b of the glass lathe. Both chucks 12a, 12b of the glass lathe are arranged coaxially.
  • the quartz glass tube 1 is adjusted in such a way that the discharge space and both squeezing ends 5a, 5b are enveloped by the glass tube 1.
  • the base 14 brings about an eccentric arrangement of the glass tube 1 with respect to the discharge vessel 2, such that the discharge vessel axis B-B and the axis of rotation of the glass tube 1 are displaced parallel to one another by the thickness of the base 14.
  • the electrodes 3 lie in the discharge vessel axis B-B and the quartz glass tube 1 forms the outer bulb, this means that the outer bulb axis A-A and the discharge path defined by the electrode heads are likewise displaced parallel to one another by the thickness of the base 14.
  • the free end of the quartz glass tube 1, which is not clamped in the chuck 12b, is heated by means of an H 2 / O 2 burner 15 to the softening temperature of the quartz glass tube of approximately 1540 ° C., or to a temperature slightly above it, and with With the help of a cutting roller 16, it is rolled onto the squeezing end 5a of the discharge vessel 2 and fused with it.
  • the discharge vessel consisting of undoped quartz glass is still solid, since the softening temperature of the undoped quartz glass is approximately 1750 ° C., ie approximately 200 ° C. above the softening temperature of the quartz glass tube. In this way, the free end of the glass tube 1 is closed and fixed to the discharge vessel 2.
  • both chucks 12a, 12b rotate synchronously.
  • the other, still open end of the quartz glass tube 1 is closed in the same way by heating using an H 2 / O 2 burner 15.
  • the two tubular extensions 8a, 8b of the discharge vessel 2 are clamped in the chuck 12a, 12b of the glass lathe.
  • the glass tube 1 is fixed to the discharge vessel 2 by its already closed end, so that it does not have to be held in a holding device of the glass lathe.
  • the quartz glass tube 1 used in this exemplary embodiment has an inner diameter of approximately 8.8 mm, a wall thickness of 1.0 mm and a length of 25-32 mm.
  • the length of the prefabricated discharge vessel 2, including its tubular extensions, is approximately 150 mm, its inner diameter is approximately 2.3 mm, its wall thickness is approximately 1.3 mm and the electrode spacing is approximately 4-5 mm.
  • the most favorable value for the distance between the outer bulb axis A-A and the discharge path or the discharge vessel axis B-B was found to be 0.65 mm.
  • the tubular extension 8b is separated from the discharge vessel, while the other tubular extension 8a is shortened and used to base the high-pressure discharge lamp.
  • the base of the lamp is described, for example, in EP-A 455 884 and will therefore not be explained in more detail here.
  • a quartz glass can therefore also be used as the outer bulb glass, which has only a viscosity-reducing doping and no doping that absorbs UV rays.
  • quartz glasses suitable as outer bulb glass can be found in EP-A-0 601 391 (Art. 54 (3) EPC).
  • Rare earth metal additives other than those specified in the exemplary embodiment can also be used as the UV radiation-absorbing doping.
  • the UV radiation-absorbing doping sensibly ranges from about 0.1 to 1.5 percent by weight for rare earth metal additives and from about 0 to 0.15 percent by weight for titanium oxide. The percentages by weight always refer to the undoped quartz glass.
  • the viscosity-reducing alkaline earth metal borate content in particular the barium metaborate content in the quartz glass, is expediently about 0.05 to 2.0 percent by weight.
  • other viscosity-reducing quartz glass dopants can of course also be used. If the rare earth metal doping in quartz glass is sufficiently high, the alkaline earth metal borate additions can be reduced or even eliminated entirely, since the rare earth metal doping in quartz glass also has a viscosity-reducing effect.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
EP94916137A 1993-05-25 1994-05-25 Hochdruckentladungslampe und herstellungsverfahren für eine hochdruckentladungslampe Expired - Lifetime EP0700579B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4317369A DE4317369A1 (de) 1993-05-25 1993-05-25 Hochdruckentladungslampe und Herstellungsverfahren für eine Hochdruckentladungslampe
DE4317369 1993-05-25
PCT/DE1994/000600 WO1994028576A1 (de) 1993-05-25 1994-05-25 Hochdruckentladungslampe und herstellungsverfahren für eine hochdruckentladungslampe

Publications (2)

Publication Number Publication Date
EP0700579A1 EP0700579A1 (de) 1996-03-13
EP0700579B1 true EP0700579B1 (de) 1997-07-30

Family

ID=6488867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94916137A Expired - Lifetime EP0700579B1 (de) 1993-05-25 1994-05-25 Hochdruckentladungslampe und herstellungsverfahren für eine hochdruckentladungslampe

Country Status (7)

Country Link
US (1) US5726532A (hu)
EP (1) EP0700579B1 (hu)
KR (1) KR100281341B1 (hu)
CA (1) CA2163132C (hu)
DE (2) DE4317369A1 (hu)
HU (1) HU215885B (hu)
WO (1) WO1994028576A1 (hu)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007018614A1 (de) 2007-04-19 2008-10-23 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe und Fahrzeugscheinwerfer mit Hochdruckentladungslampe
DE102007043165A1 (de) 2007-09-11 2009-03-12 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe und Fahrzeugscheinwerfer mit Hochdruckentladungslampe
DE102008014096A1 (de) 2008-03-05 2009-09-10 Osram Gesellschaft mit beschränkter Haftung Wolframelektrode für Hochdruckentladungslampen und Hochdruckentladungslampe mit einer Wolframelektrode
DE102008026521A1 (de) 2008-06-03 2009-12-10 Osram Gesellschaft mit beschränkter Haftung Thoriumfreie Hochdruckentladungslampe für Hochfrequenzbetrieb
DE102008057703A1 (de) 2008-11-17 2010-05-20 Osram Gesellschaft mit beschränkter Haftung Quecksilberfreie Entladungslampe
DE102009052999A1 (de) 2009-11-12 2011-05-19 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe
DE102013223708A1 (de) 2013-11-20 2015-05-21 Osram Gmbh Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer
DE102015211915A1 (de) 2015-06-26 2016-12-29 Osram Gmbh Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5506471A (en) * 1994-06-06 1996-04-09 General Electric Company Low glare infrared light source
DE4427593A1 (de) * 1994-08-04 1996-02-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Einseitig gesockelte Hochdruckentladungslampe
DE19707669A1 (de) * 1997-02-26 1998-08-27 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur Herstellung einer Hochdruckentladungslampe
JP3463557B2 (ja) * 1998-03-20 2003-11-05 ウシオ電機株式会社 放電ランプ
US6429577B1 (en) † 1998-06-12 2002-08-06 Matsushita Electric Industrial Co., Ltd. Discharge lamp with outer tube comprising silicon dioxide and boron
JP3415533B2 (ja) * 2000-01-12 2003-06-09 エヌイーシーマイクロ波管株式会社 高圧放電灯
JP2001357818A (ja) * 2000-06-13 2001-12-26 Koito Mfg Co Ltd 放電灯バルブ及び放電灯バルブの製造方法
DE10260129A1 (de) * 2002-12-19 2004-07-01 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Beleuchtungseinheit
DE10260125A1 (de) * 2002-12-19 2004-07-01 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Beleuchtungseinheit
US7893623B2 (en) * 2005-05-23 2011-02-22 Koninklijke Philips Electronics N.V. High-intensity discharge lamp
EP2487705B1 (en) * 2008-02-14 2014-09-03 Harison Toshiba Lighting Corp. Automotive discharge lamp
EP2529390B1 (en) * 2010-01-28 2019-06-26 Lumileds Holding B.V. Burner with reduced height and method of manufacturing a burner
DE102011082323A1 (de) * 2011-09-08 2013-03-14 Osram Ag Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer
DE102014204932A1 (de) 2014-03-17 2015-09-17 Osram Gmbh Hochdruckentladungslampe
DE102015200162A1 (de) 2015-01-08 2016-07-14 Osram Gmbh Hochdruckentladungslampe

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5229681A (en) * 1989-10-10 1993-07-20 Musco Corporation Discharge lamp with offset or tilted arc tube
CA2026850C (en) * 1989-10-10 2001-08-21 Myron K. Gordin Discharge lamp with offset or tilted arc tube
CA2042143A1 (en) * 1990-06-27 1991-12-28 John J. Biel Discharge lamp with surrounding shroud and method of making such lamp
US5196759B1 (en) * 1992-02-28 1996-09-24 Gen Electric High temperature lamps having UV absorbing quartz envelope
ES2108206T3 (es) * 1992-05-11 1997-12-16 Philips Electronics Nv Lampara de descarga de alta presion provista de casquillo.
JP2511393B2 (ja) * 1992-09-15 1996-06-26 パテント−トロイハント−ゲゼルシヤフト フユア エレクトリツシエ グリユーランペン ミツト ベシユレンクテル ハフツング メタルハライドランプ
DE4418198A1 (de) * 1994-05-25 1995-11-30 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Quarzglas und elektrische Lampe mit Bestandteilen aus Quarzglas

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007018614A1 (de) 2007-04-19 2008-10-23 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe und Fahrzeugscheinwerfer mit Hochdruckentladungslampe
US8310156B2 (en) 2007-04-19 2012-11-13 Osram Ag High-pressure discharge lamp and vehicle headlight with high-pressure discharge lamp
DE102007043165A1 (de) 2007-09-11 2009-03-12 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe und Fahrzeugscheinwerfer mit Hochdruckentladungslampe
DE102008014096A1 (de) 2008-03-05 2009-09-10 Osram Gesellschaft mit beschränkter Haftung Wolframelektrode für Hochdruckentladungslampen und Hochdruckentladungslampe mit einer Wolframelektrode
DE102008026521A1 (de) 2008-06-03 2009-12-10 Osram Gesellschaft mit beschränkter Haftung Thoriumfreie Hochdruckentladungslampe für Hochfrequenzbetrieb
DE102008057703A1 (de) 2008-11-17 2010-05-20 Osram Gesellschaft mit beschränkter Haftung Quecksilberfreie Entladungslampe
US8736165B2 (en) 2008-11-17 2014-05-27 Osram Gesellschaft Mit Beschraenkter Haftung Mercury-free discharge lamp having a translucent discharge vessel
DE102009052999A1 (de) 2009-11-12 2011-05-19 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe
WO2011057903A1 (de) 2009-11-12 2011-05-19 Osram Gesellschaft mit beschränkter Haftung Quecksilberfreie hochdruckentladungslampe mit reduziertem zinkhalogenidanteil
DE102013223708A1 (de) 2013-11-20 2015-05-21 Osram Gmbh Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer
DE102015211915A1 (de) 2015-06-26 2016-12-29 Osram Gmbh Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer

Also Published As

Publication number Publication date
CA2163132A1 (en) 1994-12-08
HUT72240A (en) 1996-04-29
DE4317369A1 (de) 1994-12-01
HU9503378D0 (en) 1996-01-29
US5726532A (en) 1998-03-10
EP0700579A1 (de) 1996-03-13
HU215885B (hu) 1999-03-29
CA2163132C (en) 2002-04-09
DE59403570D1 (de) 1997-09-04
KR100281341B1 (ko) 2001-03-02
WO1994028576A1 (de) 1994-12-08

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