EP1465236A2 - Lampe à décharge - Google Patents

Lampe à décharge Download PDF

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Publication number
EP1465236A2
EP1465236A2 EP04003794A EP04003794A EP1465236A2 EP 1465236 A2 EP1465236 A2 EP 1465236A2 EP 04003794 A EP04003794 A EP 04003794A EP 04003794 A EP04003794 A EP 04003794A EP 1465236 A2 EP1465236 A2 EP 1465236A2
Authority
EP
European Patent Office
Prior art keywords
electrode
discharge
discharge lamp
discharge vessel
lamp according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04003794A
Other languages
German (de)
English (en)
Other versions
EP1465236A3 (fr
Inventor
Thomas Bittmann
Alfred Langer
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 EP1465236A2 publication Critical patent/EP1465236A2/fr
Publication of EP1465236A3 publication Critical patent/EP1465236A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/22—Wheels for roller skates
    • A63C17/223—Wheel hubs
    • 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
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/04—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs
    • A63C17/06—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs single-track type
    • A63C17/068—Production or mounting thereof
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/22—Wheels for roller skates
    • A63C17/226—Wheel mounting, i.e. arrangement connecting wheel and axle mount
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0735—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode

Definitions

  • Such a discharge lamp is for example in the European patent EP 0 858 098 B1.
  • This document describes a high pressure metal halide discharge lamp for vehicle headlights with a discharge vessel Quartz glass, inside of which an ionizable filling is enclosed gas-tight.
  • the discharge vessel has two sealed ends, each with a feedthrough and one electrode each, each with one of the current feedthroughs are connected and which protrude into the interior of the discharge vessel.
  • the section of the electrodes embedded in the quartz glass is in each case of a spiral encased to reduce cracks in the quartz glass.
  • the published patent application EP 1 111 655 A1 describes one consisting of molybdenum Melting film for lamp construction, with a coating containing ruthenium is provided.
  • This sealing film is part of a current feedthrough, which is arranged in a sealed end of a lamp vessel. through this gas-tightly melted foil in the end of the lamp vessel will Sealed lamp vessel.
  • the coating containing ruthenium enables one better welded connection between the sealing foil and the associated ones Power supply wires.
  • Cracks caused by the different coefficients of thermal expansion of the discharge vessel material and the electrode material and through adhesion of the discharge vessel material to the electrodes are avoided without additional components such as those mentioned above State of the art listed spirals are used.
  • the discharge lamp according to the invention has a discharge vessel, in the interior thereof an ionizable filling is enclosed gas-tight.
  • the discharge vessel has at least one sealed end with a feedthrough, those with a protruding into the interior of the discharge vessel and themselves is connected into the sealed end extending electrode.
  • the portion of the electrode extending into the sealed end with a Coating provided that a high-melting metal from the group of platinum metals contains.
  • high-melting means that the Melting temperature of the platinum metals above the processing temperature of the discharge vessel material, which is required to seal its ends.
  • Discharge vessel of high-pressure discharge lamps usually consists of quartz glass, preferably one of the platinum metals ruthenium, Iridium, osmium or rhodium are used.
  • the coating according to the invention extends at least over a portion of the surface of the sealed end protruding electrode section or preferably even over the entire Surface of the above electrode section. Because of that in the sealed end of the discharge vessel extending portion of the electrode the above-mentioned coating according to the invention is provided. becomes liability reduced so far between the material of the discharge vessel and the electrode, that by the stronger compared to the surrounding discharge vessel material thermal expansion of the electrode only low mechanical stresses in the sealed end of the discharge vessel are generated, which does not destroy the Cause discharge discharge.
  • the coating consists of ruthenium or a ruthenium alloy, in particular an alloy of ruthenium the electrode material.
  • the invention can be applied particularly advantageously to discharge lamps, the Current feedthroughs have to carry a comparatively high current and whose discharge vessel is made of quartz glass.
  • Metal halide high-pressure discharge lamps are an example of this for vehicle headlights and especially mercury-free Metal halide high-intensity discharge lamps.
  • These high pressure discharge lamps usually have a quartz glass discharge vessel with seals Ends that have current feedthroughs with molybdenum foil seals. Those protruding into the discharge space, usually made of tungsten Electrodes of the lamp are connected to the molybdenum foil seals.
  • the mercury-free metal halide high-pressure discharge lamps especially need thick electrodes because they have to carry an even higher current than that usual metal halide high-pressure discharge lamps for vehicle headlights. The problem described above therefore occurs to an even greater extent in these lamps than with other high-pressure discharge lamps.
  • FIG. 1 The embodiment of the invention shown in FIG. 1 is concerned is a mercury-free metal halide high-pressure discharge lamp with a electrical power consumption of approx. 35 watts.
  • This high pressure discharge lamp has a discharge vessel 1 made of quartz glass with an interior 10 and two diametrically arranged, sealed ends 11, 12, each having a current feedthrough 2, 3 have. Two diametrically arranged electrodes protrude into the interior 10 4, 5, which are each connected to one of the current bushings 2 and 3 and between which a gas discharge forms during lamp operation.
  • an ionizable filling which consists of xenon and several metal halides.
  • the discharge vessel 1 is surrounded by an outer bulb 6, which consists of quartz glass with Ultraviolet radiation absorbing dopants is provided.
  • the lamp points Furthermore, a plastic base 7, which carries the two lamp vessels 1, 6 and is equipped with the electrical connections 8 of the lamp.
  • the current feedthrough 2 of the base distal end 11 of the discharge vessel 1 is via the current feedback 9 connected to the first electrical connector 8 while the other Power feedthrough 5 with a second electrical connection (not shown) the lamp is connected.
  • the complete control gear can Lamp or parts of the operating device, for example the ignition device, arranged his.
  • FIG. 2 shows details of the discharge vessel 1 and the current feedthrough 2 sealed ends 11, 12 of the discharge vessel 1 each have a current feedthrough 2, 3 on.
  • the current bushings 2, 3 each have a gas-tight embedded molybdenum foil 21 or 31 on the respective end 11 or 12.
  • the side of the respective molybdenum foil facing away from the interior 10 of the discharge vessel 1 21 and 31 are welded to a molybdenum wire 22 and 32, which protrudes from the corresponding sealed end 11 or 12.
  • the one Interior 10 of the discharge vessel 1 facing the side of the respective molybdenum foil 21 and 31 is each with a rod-shaped electrode made of tungsten 4 or 5 welded, which protrude into the discharge space 10.
  • a coating 410 which are made of ruthenium or a ruthenium-tungsten alloy, which can form after coating.
  • Your layer thickness is approximately 500 nm.
  • the length of the electrode 4 is 6.5 mm and its thickness 0.33 mm.
  • the section protruding into the interior 10 of the discharge vessel 1 42 of the electrode 4 has no coating in order to avoid the Components of the ionizable filling or those within the discharge space occurring gas discharge can be influenced by ruthenium.
  • the other electrode 5 is identical to the electrode 4.
  • the invention is not limited to the exemplary embodiment explained in more detail above.
  • the entire one does not have to extend into the sealed end 11 Provide section 41 of the electrodes 4 and 5 with the ruthenium layer 410 his. It is sufficient if only parts of those in contact with the quartz glass Coat the surface of the electrode with the coating containing ruthenium to significantly reduce the risk of cracks in the quartz glass.
  • those extending into the sealed end 11 or 12 can also Portions of the molybdenum wires 22, 32 with a coating containing ruthenium be provided to further reduce the risk of cracks in the quartz glass.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
EP04003794A 2003-03-21 2004-02-19 Lampe à décharge Withdrawn EP1465236A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10312748 2003-03-21
DE10312748A DE10312748A1 (de) 2003-03-21 2003-03-21 Entladungslampe

Publications (2)

Publication Number Publication Date
EP1465236A2 true EP1465236A2 (fr) 2004-10-06
EP1465236A3 EP1465236A3 (fr) 2005-12-14

Family

ID=32842159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04003794A Withdrawn EP1465236A3 (fr) 2003-03-21 2004-02-19 Lampe à décharge

Country Status (5)

Country Link
US (1) US20040183443A1 (fr)
EP (1) EP1465236A3 (fr)
JP (1) JP2004288631A (fr)
KR (1) KR20040083379A (fr)
DE (1) DE10312748A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005015600A3 (fr) * 2003-08-06 2005-08-11 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Systeme d'electrode pourvu d'un nouveau type de liaison, lampe associee comprenant un tel systeme et procede de production de ladite liaison

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060108928A1 (en) * 2004-11-24 2006-05-25 Patent-Treuhand-Gesellschaft Fur Elektrisch Gluhlampen Mbh Process for producing a supply conductor for a lamp, and supply conductor for a lamp, as well as lamp having a supply conductor
JP4498940B2 (ja) * 2005-02-02 2010-07-07 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
US7952283B2 (en) 2005-11-09 2011-05-31 General Electric Company High intensity discharge lamp with improved crack control and method of manufacture
JP5043123B2 (ja) * 2006-12-18 2012-10-10 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ セラミック放電容器を有する高圧放電ランプ

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524233B2 (fr) * 1972-07-01 1980-06-27
JPH02170338A (ja) * 1988-12-23 1990-07-02 Ushio Inc 電極組立体
JPH06223783A (ja) * 1993-01-28 1994-08-12 Matsushita Electric Ind Co Ltd 放電ランプおよびその製造方法
JP3218560B2 (ja) * 1997-02-07 2001-10-15 スタンレー電気株式会社 前照灯用メタルハライドランプ
EP1065698B1 (fr) * 1999-07-02 2008-07-30 Phoenix Electric Co., Ltd. Structure de montage pour lampe et structure de scellement de lampe l'utilisant
DE19961551A1 (de) * 1999-12-20 2001-06-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Einschmelzfolie und zugehörige Lampe mit dieser Folie
CN1235260C (zh) * 2001-03-30 2006-01-04 松下电器产业株式会社 汽车前灯用金属卤化物灯
KR20030020846A (ko) * 2001-09-04 2003-03-10 마쯔시다덴기산교 가부시키가이샤 고압방전램프 및 그 제조방법
KR20030046318A (ko) * 2001-12-05 2003-06-12 마쯔시다덴기산교 가부시키가이샤 고압방전램프의 제조방법, 고압방전램프 및 램프유닛
DE10218412A1 (de) * 2002-04-24 2003-11-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Einschmelzfolie und zugehörige Lampe mit dieser Folie
US7097529B2 (en) * 2003-01-14 2006-08-29 Matsushita Electric Industrial Co., Ltd. Method for producing a high pressure discharge lamp, with sealing portion having first and second glass members
US7038384B2 (en) * 2003-01-14 2006-05-02 Matsushita Electric Industrial Co., Ltd. High pressure discharge lamp, method for producing the same and lamp unit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005015600A3 (fr) * 2003-08-06 2005-08-11 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Systeme d'electrode pourvu d'un nouveau type de liaison, lampe associee comprenant un tel systeme et procede de production de ladite liaison

Also Published As

Publication number Publication date
EP1465236A3 (fr) 2005-12-14
US20040183443A1 (en) 2004-09-23
KR20040083379A (ko) 2004-10-01
DE10312748A1 (de) 2004-09-30
JP2004288631A (ja) 2004-10-14

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