EP1465237B1 - Lampe à décharge à haute pression pour projecteurs de véhicule - Google Patents

Lampe à décharge à haute pression pour projecteurs de véhicule Download PDF

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Publication number
EP1465237B1
EP1465237B1 EP04003303.7A EP04003303A EP1465237B1 EP 1465237 B1 EP1465237 B1 EP 1465237B1 EP 04003303 A EP04003303 A EP 04003303A EP 1465237 B1 EP1465237 B1 EP 1465237B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure discharge
value
iodide
discharge lamp
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
EP04003303.7A
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German (de)
English (en)
Other versions
EP1465237A3 (fr
EP1465237A2 (fr
Inventor
Dirk Grundmann
Conrad Schimke
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 EP1465237A2 publication Critical patent/EP1465237A2/fr
Publication of EP1465237A3 publication Critical patent/EP1465237A3/fr
Application granted granted Critical
Publication of EP1465237B1 publication Critical patent/EP1465237B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/14—Arcing horns
    • 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
    • H01J61/827—Metal halide arc lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/125—Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/02—Details

Definitions

  • the invention relates to a high-pressure discharge lamp according to the preamble of patent claim 1.
  • Such lamps usually have an ionizable filling which, in addition to mercury and xenon, contains halides of the metals sodium and scandium and optionally also halides of other metals.
  • the mercury is less used to generate light, but due to its high vapor pressure primarily to improve the electrical properties of these lamps, in particular to achieve a burning voltage in the range of 80 V to 110 V. Recently, such lamps without the use of construct environmentally harmful mercury.
  • the European disclosure EP 0 903 770 A2 describes mercury-free metal halide high-pressure discharge lamps, the ionizable filling of which contains at least one easily evaporable metal halide serving as a voltage gradient former and further metal halides serving for the generation of light.
  • the metal halides serving ascertainsgradientenstoryner take over substantially the functions of mercury in the mercury-free high-pressure discharge lamps.
  • Asrsgradientenchanner halides of the metals Al, Bi, Hf, In, Mg, Sc, Sn, Tl, Zr, Zn, Sb or Ga are used.
  • Halides of the metals Na, Pr, Nd, Ce, La, Dy, Ho, Tl, Sc, Hf, Zr or Tm are mainly used for light generation.
  • the European disclosure EP 0 883 160 A1 discloses mercury-free metal halide high-intensity discharge lamps whose ionizable filling contains a noble gas, a first photo-generating metal halide and a second metal halide serving as a buffer gas, which has a high vapor pressure.
  • a buffer gas halides of the metals iron, cobalt, chromium, zinc, nickel, manganese, aluminum, antimony, beryllium, rhenium, gallium, titanium, zirconium or hafnium are listed.
  • the WO 2004/025691 A1 discloses a high pressure discharge lamp for vehicle headlamps whose ionizable charge contains at least one noble gas, 0-10 mg of mercury and a metal halide mixture containing 40-80 weight percent sodium halide, 25-55 weight percent scandium halide, 1-15 weight percent indium halide and 0-34 weight percent thallium halide.
  • the EP 1 453 363 A1 discloses an operating device for a high-pressure metal halide high-pressure discharge lamp and a headlamp for a motor vehicle with a device for supplying an electric lamp power that is greater than the nominal lamp power.
  • the EP 1 349 197 A2 discloses a mercury-free high pressure discharge lamp for vehicle headlamps having an electrical power of less than or equal to 60 W, the first halides of which contain essentially sodium halide and scandium halide and second halides for adjusting the lamp operating voltage and xenon, with mass a of sodium halide and mass b of Scandiumhalogenid the formula 0.25 ⁇ a / (a + b) ⁇ 0.8 applies.
  • the JP 2002-298780 A discloses a mercury-free high pressure discharge lamp whose ionizable filling contains as the first halides sodium iodide and scandium iodide, as the second halide zinc iodide and as the third halide indium iodide.
  • the high-pressure discharge lamp according to the invention has a gas-tight discharge vessel in which two electrodes and an ionizable filling for generating a gas discharge are arranged, wherein the ionizable filling consists of xenon and iodides of the metals sodium, scandium, indium and zinc. It has been found that by exclusively using the aforementioned filling components, a high-pressure discharge lamp with sufficiently good color rendering, luminous efficacy and durability can be built for use as a light source in a vehicle headlight.
  • the means listed in the prior art for raising the burning voltage to the usual values for mercury-containing lamps between 80 volts and 110 volts are not required. Instead, the high-pressure discharge lamp according to the invention has an operating voltage of only 45 volts.
  • the iodides of the above-mentioned metals are chemically less aggressive than the bromides and usually have a higher vapor pressure.
  • the iodides of the abovementioned metals are also suitable for high-pressure discharge lamps with a quartz glass discharge vessel. It is not necessarily discharge vessels made of translucent ceramic such as polycrystalline alumina, sapphire or aluminum nitride required.
  • an ionizable filling which consists of the following components:
  • Xenon having a cold fill pressure that is the pressure at room temperature (22 ° C), of at least 9000 hPa, preferably even at least 11000 hPa, and at most 13000 hPa, at least 0.15 mg and at most 0.30 mg sodium iodide, at least 0, 10 mg and at most 0.25 mg scandium iodide, maximum 0.10 mg, but preferably not more than 0.05 mg zinc iodide and a maximum of 0.05 mg indium iodide.
  • the cold filling pressure of the xenon and the Zinkjodidanteils the burning voltage of the lamp, which is the voltage drop across the lamp in quasi-stationary lamp operation, that is, after ignition and stabilization of the gas discharge in the discharge vessel to a constant value, preferably to 45 Volt, set.
  • xenon contributes significantly to increasing the efficiency of light generation in the gas discharge.
  • the cold filling pressure of the xenon should therefore be at least 9000 hPa, preferably even at least 11000 hPa, in order to achieve a high luminous flux and thus a high luminous efficacy.
  • the luminous flux is 2982 Im and the luminous efficacy 85 lm / W and at a cold fill pressure of 11000 hPa the luminous flux increases to 3112 Im and the luminous efficacy even improves to 89 Im / W.
  • the discharge vessel would also withstand a xenon cold fill pressure of more than 20,000 hPa, but at one Exceeding the xenon cold pressure of 13000 hPa change both the burning voltage of the lamp and the color temperature of the light generated in the gas discharge.
  • the proportion of scandium iodide would have to be increased. However, this could lead to damage to the discharge vessel, which preferably consists of quartz glass, since scandium reacts chemically with quartz.
  • the proportion of zinc iodide is advantageously selected accordingly.
  • the proportion of zinc iodide is less than or equal to 0.10 mg and preferably even less than or equal to 0.05 mg.
  • sodium iodide, scandium iodide and indium iodide are used in addition to the already mentioned filling components.
  • the desired color temperature preferably 4000 K
  • the desired color location of the light generated by the gas discharge is determined by the desired color temperature, preferably 4000 K
  • the addition of a comparatively small amount of indium iodide is required to produce white light according to ECE regulation R.99.
  • the color location of the filling according to the preferred embodiment is within the in the FIG. 4 Trapezoid which defines the white light color loci permitted by vehicle headlamps according to ECE regulation R.99.
  • the molar ratio of sodium to scandium in the ionizable filling of the lamp according to the invention advantageously has a value between 3 and 6.
  • the electrodes of the high-pressure discharge lamps according to the invention advantageously have a thickness or a diameter in the range of 0.27 mm to 0.36 mm in order to be able to conduct a sufficiently high current.
  • the high-pressure discharge lamps according to the invention have a low burning voltage U.
  • high-pressure discharge lamps according to the invention have correspondingly thicker electrodes, the have a correspondingly higher current carrying capacity.
  • the distance between the electrodes is advantageously less than 5 mm, so that the discharge arc can be better imaged by means of the optical systems in the vehicle headlight.
  • the preferred embodiment of the invention is a mercury-free metal halide high pressure discharge lamp having an electrical power consumption of about 35 watts.
  • This lamp is intended for use in a vehicle headlight. It has a two-sided sealed discharge vessel 30 made of quartz glass with a volume of 24 mm 3 , in which an ionizable filling is enclosed gas-tight.
  • the inner contour of the discharge vessel 30 is circular-cylindrical and its outer contour is ellipsoidal.
  • the inner diameter of the discharge space 106 is 2.6 mm and its outer diameter is 6.3 mm.
  • the two ends 101, 102 of the discharge vessel 10 are each sealed by means of a molybdenum foil sealing 103, 104.
  • the electrodes 11, 12 are made of tungsten. Their thickness or their diameter is 0.30 mm. The distance between the electrodes 11, 12 is 4.2 mm.
  • the electrodes 11, 12 are each connected via one of the Molybdänfolien-Einschmelzept 103, 104 and the socket-remote power supply 13 or via the base-side current return 14 electrically conductively connected to an electrical terminal of the substantially plastic lamp base 15.
  • the discharge vessel 10 is enveloped by a glass outer bulb 16.
  • the outer bulb 16 has an extension 161 anchored in the base 15.
  • the discharge vessel 10 has a tube-like extension 105 made of quartz glass on the base side, in which the base-side current supply 14 extends.
  • the ionizable filling included in the discharge vessel consists of xenon having a cold fill pressure of 11800 hPa, 0.25 mg of sodium iodide, 0.18 mg of scandium iodide, 0.03 mg of zinc iodide and 0.0024 mg of indium iodide.
  • the burning voltage U of the lamp is 45 volts.

Landscapes

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

Claims (3)

  1. Lampe à décharge haute pression pour projecteurs de véhicule, comprenant une enceinte de décharge (10) fermée de manière étanche aux gaz, dont le volume a une valeur comprise dans la plage de 23 mm3 à 30 mm3 et dans laquelle sont situés deux électrodes (11, 12) ainsi qu'une charge ionisable pour générer une décharge de gaz, la charge ionisable étant composée de xénon et d'iodures des métaux sodium, scandium, indium et zinc, caractérisée en ce que :
    - la pression de remplissage à froid de xénon a une valeur comprise dans la plage de 9000 hPa à 13000 hPa ;
    - la fraction d'iodure de sodium NaI a une valeur comprise dans la plage de 0,15 mg à 0,30 mg ;
    - la fraction d'iodure de scandium ScI3 a une valeur comprise dans la plage de 0,10 mg à 0,25 mg ;
    - la fraction d'iodure de zinc ZnI2 a une valeur inférieure ou égale à 0,10 mg ; et
    - la fraction d'iodure d'indium InI a une valeur inférieure ou égale à 0,05 mg.
  2. Lampe à décharge haute pression selon la revendication 1, caractérisée en ce que l'épaisseur ou le diamètre des électrodes (11, 12) ont une valeur comprise dans la plage de 0,27 mm à 0,36 mm et en ce que la distance entre les électrodes (11, 12) est inférieure à 5 mm.
  3. Lampe à décharge haute pression selon la revendication 2, caractérisée en ce que :
    - la lampe à décharge haute pression comporte une ampoule extérieure (16) qui entoure l'enceinte de décharge (10) ;
    - l'enceinte de décharge (10) est composée de verre de quartz.
EP04003303.7A 2003-03-19 2004-02-13 Lampe à décharge à haute pression pour projecteurs de véhicule Expired - Lifetime EP1465237B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10312290 2003-03-19
DE10312290A DE10312290A1 (de) 2003-03-19 2003-03-19 Hochdruckentladungslampe für Fahrzeugscheinwerfer

Publications (3)

Publication Number Publication Date
EP1465237A2 EP1465237A2 (fr) 2004-10-06
EP1465237A3 EP1465237A3 (fr) 2007-12-19
EP1465237B1 true EP1465237B1 (fr) 2013-10-02

Family

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Application Number Title Priority Date Filing Date
EP04003303.7A Expired - Lifetime EP1465237B1 (fr) 2003-03-19 2004-02-13 Lampe à décharge à haute pression pour projecteurs de véhicule

Country Status (5)

Country Link
US (1) US7126281B2 (fr)
EP (1) EP1465237B1 (fr)
JP (1) JP4404663B2 (fr)
KR (1) KR101079746B1 (fr)
DE (1) DE10312290A1 (fr)

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DE10333740A1 (de) * 2003-07-23 2005-02-10 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Betriebsverfahren für eine Hochdruckentladungslampe
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US7358666B2 (en) * 2004-09-29 2008-04-15 General Electric Company System and method for sealing high intensity discharge lamps
WO2006043191A1 (fr) * 2004-10-20 2006-04-27 Philips Intellectual Property & Standards Gmbh Lampe a decharge a haute intensite
DE102004057906A1 (de) 2004-11-30 2006-06-01 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
US7852006B2 (en) 2005-06-30 2010-12-14 General Electric Company Ceramic lamp having molybdenum-rhenium end cap and systems and methods therewith
US7432657B2 (en) * 2005-06-30 2008-10-07 General Electric Company Ceramic lamp having shielded niobium end cap and systems and methods therewith
US7615929B2 (en) 2005-06-30 2009-11-10 General Electric Company Ceramic lamps and methods of making same
JP4890809B2 (ja) * 2005-07-28 2012-03-07 ハリソン東芝ライティング株式会社 メタルハライドランプ、メタルハライドランプ点灯装置および前照灯
JP2007059086A (ja) * 2005-08-22 2007-03-08 Harison Toshiba Lighting Corp メタルハライドランプ
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US7378799B2 (en) * 2005-11-29 2008-05-27 General Electric Company High intensity discharge lamp having compliant seal
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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
US8436539B2 (en) 2007-09-24 2013-05-07 Koninklijke Philips Electronics N.V. Thorium-free discharge lamp with reduced halides and increased relative amount of Sc
DE102008003907A1 (de) 2008-01-11 2009-07-16 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe
WO2009127993A1 (fr) * 2008-04-14 2009-10-22 Philips Intellectual Property & Standards Gmbh Lampe à décharge à efficacité élevée
DE102008022452B4 (de) 2008-05-08 2010-09-23 Bauhaus Luftfahrt E. V. Flugzeug mit aktiv steuerbaren Hilfsflügeln
DE202008007162U1 (de) 2008-05-28 2008-08-07 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe
CN105206501B (zh) * 2008-09-10 2017-09-01 皇家飞利浦电子股份有限公司 带有改进的放电容器的放电灯
US20100079070A1 (en) * 2008-09-30 2010-04-01 Osram Sylvania Inc. Mercury-free discharge lamp
DE102008051825A1 (de) 2008-10-15 2010-04-22 Osram Gesellschaft mit beschränkter Haftung Elektrode für eine Entladungslampe und Entladungslampe sowie Verfahren zur Herstellung einer Elektrode
DE102008057703A1 (de) * 2008-11-17 2010-05-20 Osram Gesellschaft mit beschränkter Haftung Quecksilberfreie Entladungslampe
WO2010097732A2 (fr) 2009-02-24 2010-09-02 Koninklijke Philips Electronics N. V. Lampe à décharge de gaz de haute intensité
DE102009052999A1 (de) 2009-11-12 2011-05-19 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe
DE102010063755A1 (de) 2010-12-10 2012-06-14 Osram Ag Hochdruckentladungslampe
DE102012215184A1 (de) * 2012-08-27 2014-02-27 Osram Gmbh Hochdruckentladungslampe
CN104183465A (zh) * 2013-05-28 2014-12-03 海洋王照明科技股份有限公司 陶瓷金卤灯
DE102013223708A1 (de) 2013-11-20 2015-05-21 Osram Gmbh Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer
CN104900476A (zh) * 2014-03-05 2015-09-09 上虞市大地照明电器有限公司 一种无汞纳米荧光灯及其制作工艺
DE102015211915A1 (de) 2015-06-26 2016-12-29 Osram Gmbh Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer

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Also Published As

Publication number Publication date
US7126281B2 (en) 2006-10-24
EP1465237A3 (fr) 2007-12-19
KR101079746B1 (ko) 2011-11-03
KR20040083006A (ko) 2004-09-30
DE10312290A1 (de) 2004-09-30
JP2004288629A (ja) 2004-10-14
US20040183446A1 (en) 2004-09-23
EP1465237A2 (fr) 2004-10-06
JP4404663B2 (ja) 2010-01-27

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