EP0479087A1 - Lampe à décharge à haute pression - Google Patents

Lampe à décharge à haute pression Download PDF

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Publication number
EP0479087A1
EP0479087A1 EP91116145A EP91116145A EP0479087A1 EP 0479087 A1 EP0479087 A1 EP 0479087A1 EP 91116145 A EP91116145 A EP 91116145A EP 91116145 A EP91116145 A EP 91116145A EP 0479087 A1 EP0479087 A1 EP 0479087A1
Authority
EP
European Patent Office
Prior art keywords
electrode
foils
discharge lamp
pressure discharge
molybdenum
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
EP91116145A
Other languages
German (de)
English (en)
Other versions
EP0479087B1 (fr
Inventor
Angus Dixon
Hans-Werner Gölling
Jürgen Begemann
Jörn Dierks
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 EP0479087A1 publication Critical patent/EP0479087A1/fr
Application granted granted Critical
Publication of EP0479087B1 publication Critical patent/EP0479087B1/fr
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
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H01J61/368—Pinched seals or analogous seals

Definitions

  • the invention relates to a high-pressure discharge lamp according to the preamble of claim 1.
  • high-pressure discharge lamps are metal halide discharge lamps and high-pressure xenon and high-pressure mercury discharge lamps. These lamps can e.g. be used for film and television recordings and for stage lighting.
  • the metal halide discharge lamps e.g. have relatively long piston necks that are melted into the actual discharge space. The relatively long piston necks make it possible to place the sealing foils for the electrode shafts as far as possible from the discharge arc in order to avoid sealing problems on the sealing foils caused by the heat of the discharge arc.
  • the quartz glass of the piston neck must not touch the electrode shaft, because otherwise the mechanical expansion coefficients of quartz glass and tungsten electrode shaft, which differ greatly in temperature, cause considerable mechanical stresses during cooling, which lead to cracks or cracks in the quartz glass and thus to premature failure of the Can lead lamp.
  • the quartz glass of the bulb necks in the lamps according to the invention can only touch the high-temperature-resistant metal foils which surround the electrode shafts and the power supply parts.
  • the thin metal foils act as a buffer between the respective electrode shaft or the power supply parts and the quartz glass of the corresponding piston neck. Investigations have shown that the profiling of the surfaces of these metal foils means that no or only slight mechanical stresses are transferred to the quartz glass wall during the heating of the discharge vessel. Due to the profiling, the metal foils receive spring properties and form an elastic intermediate layer between the electrode shafts or the power supply parts and the quartz glass wall, so that the mechanical stresses due to the extremely different thermal expansion coefficients of quartz and tungsten or molybdenum can be absorbed by the profile foils. In addition, the profile foils allow a more precise maintenance of the electrode spacing and a better axial alignment of the electrode system in the piston neck.
  • the quartz glass melt-in capillaries which are still loose before melting, are fixed by the profile foils, i.e. they do not need additional measures, e.g. Holding flags to be clamped.
  • thin molybdenum foils are preferably used, which are wound once or twice around the electrode shafts and the current leads.
  • FIG. 1 shows a longitudinal section through the part of a high-pressure discharge lamp relating to the invention, in particular a 24,000 watt metal halide discharge lamp.
  • the discharge vessel 1 consists of quartz glass and has a discharge space 2 with a volume of approximately 250 cm 3. On the opposite sides of the discharge space 2, two cylindrical piston necks 3 with an outer diameter of 22 mm are arranged, of which only one is shown in the figure.
  • Two electrode shafts 4 made of tungsten each extend from the discharge space 2 into a bulb neck 3 and are each approximately 5 mm thick there Molybdenum disk 7 soldered. The diameter of the electrode shafts 4 is approximately 6 mm.
  • Four sealing foils 5 made of molybdenum are welded to the molybdenum disk 7 and are arranged uniformly on the outer surface of a hollow quartz glass rod 8. The sealing foils 5 form a gas-tight seal with the quartz glass of the piston neck 3 and the hollow rod 8.
  • Both electrode shafts 4 are each enveloped in the piston neck area by a thin molybdenum foil 6, which is wound 1.5 times around the circumference of the electrode shafts 4 and extends at least from the end of the electrode shaft 4 located in the piston neck 3 to the opening of the piston neck 3.
  • the thickness of the molybdenum foils 6 and the diameter of the electrode shaft 4 are not shown to scale in the figure, which is used only for the schematic representation of the lamp structure.
  • both surfaces of the molybdenum foils 6 each have a regular profile, which cannot be seen from FIGS. 1 to 5.
  • the profiles in the surfaces of the foils 6 are created by rolling the molybdenum foils 6. In the non-rolled state, the thickness of these foils is approximately 22 ⁇ m.
  • the profile in the surface of the molybdenum foils 6 facing the quartz glass is shown schematically in FIG. 6 and explained in more detail below in the text in the next exemplary embodiment.
  • FIG. 2 shows a longitudinal section through a metal halide discharge lamp according to the invention according to a second exemplary embodiment. It has an electrical power consumption of approx. 12 kW.
  • the discharge vessel 9 consists of quartz glass and has a discharge space 10 and two axially symmetrically arranged Piston necks 11 on.
  • Two electrode shafts 12 made of tungsten each extend from the discharge space 10 into a piston neck 11 and are welded there with their flattened end 13 to two parallel sealing foils 14 made of molybdenum, which make the electrical contact with the current leads 15 and with the quartz glass of the piston necks 11 form a gas-tight seal.
  • Both electrode shafts 12 are surrounded in the region of the piston necks 11 by a sleeve 16, which each consist of a rolled, profiled molybdenum foil, which surround the outer surface of the electrode shafts 12 at least once, preferably 1.25 times.
  • the sleeves 16 are welded to the corresponding electrode shaft 12 at two points each and extend from its flattened end 13 into the discharge space 10.
  • the side faces of the flattened ends 13 of both electrode shafts 12, which are not welded to the sealing foils 14, are additionally encased by a U-shaped, profiled molybdenum foil 17, which ends with the sleeve 16 of the corresponding electrode shaft 12.
  • the current leads 15, insofar as they run inside the piston necks 11, are each surrounded by a thin profiled molybdenum foil 18.
  • the molybdenum foils Before the profile is embossed, the molybdenum foils have a thickness of approximately 20 ⁇ m. After the profile has been embossed, depending on the embodiment, its thickness increases by a factor of 1.2 to 5.
  • the profile of the molybdenum foils for the sleeves 16 and for the coverings 17, 18 consists of a first set of parallel grooves, the second set cuts of parallel grooves at an angle of approx. 60 °.
  • the distance between two adjacent grooves from a coulter is approximately 1 mm ( Figure 6).
  • the metal foils 6, 16, 17, 18 can also consist of tantalum or tungsten or of alloys of the three metals molybdenum, tungsten and tantalum and their thickness can be up to 200 ⁇ m.
  • the covering of the electrodes and the power supply lines with profiled molybdenum foils has not only proven itself in the metal halide discharge lamps of the above exemplary embodiments, but can also be used successfully with other high-pressure discharge lamps, in particular mercury vapor lamps and with high-pressure xenon discharge lamps (short-arc lamps).
  • FIG. 4 shows, as a third exemplary embodiment, a cross section through an electrode melting of a high-pressure mercury vapor or xenon high-pressure discharge lamp, which is designed for currents greater than 20 A. Only part of the discharge vessel 19 and one of the two bulb necks 20, which, like the discharge vessel 19, are made of quartz glass, are shown in FIG. 4 of the high-pressure discharge lamp according to the invention.
  • the electrode systems have an electrode head 21 made of tungsten, which is welded or soldered to an electrode shaft 22 made of tungsten is.
  • a 5 mm thick molybdenum disk 23 is soldered to the free end of the electrode shaft 22.
  • the electrode system also includes four molybdenum sealing foils 24 which are arranged uniformly along the circumference of the molybdenum disk 23 and are welded to the molybdenum disk 23 at one of their ends.
  • the other end of the molybdenum sealing foils 24 is welded to a second, 5 mm thick molybdenum disk 25, which in turn is welded or soldered to a power supply 26 made of molybdenum.
  • the empty space between the two molybdenum disks 23, 25 is filled by two melting capillaries 27, 28 made of quartz glass, which coaxially envelop the blind piece 26a of the power supply 26 projecting beyond the molybdenum disk 25 in the direction of the discharge space.
  • the blind piece 26a is used for heat dissipation and for alignment and for fixing the power supply 26.
  • the outer melting capillary 28 is closed at its end, which faces the discharge space.
  • the four sealing foils 24 rest on the outer surface of the melting capillary 28.
  • the space between the inner melting capillary 27, which only serves as a melting aid, and the blind piece 26a of the power supply 26 is filled by a thin, profiled molybdenum foil 29 which completely surrounds the outer surface of the power supply 26 in this area.
  • the end of the power supply 26 and the electrode shaft 22 facing away from the discharge space are each encased in the region of the piston neck 20 by a melting ring 30, 31 of a quartz glass capillary, which fuse with the quartz glass of the piston neck 20 during the melting process.
  • Direct contact of the electrode shaft 22 and the power supply 26 with the melting rings 30, 31 is achieved by two prevents thin, profiled molybdenum foils 32, 33 which fill the space between the sealing rings 30, 31 and the electrode shaft 22 or the power supply 26 and completely surround their outer surface in this area.
  • the outer surfaces of the two molybdenum disks 23, 25 are each surrounded by a sleeve 34, 35 made of profiled molybdenum foil.
  • the cover surfaces of the molybdenum disks 23, 25, which face the melting rings 30, 31, are each covered by a thin profiled molybdenum foil 36, 37.
  • the profiled molybdenum foils used have the same profile as the foils of the second exemplary embodiment.
  • the thickness of the molybdenum foils used here also corresponds to these.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
EP91116145A 1990-10-02 1991-09-23 Lampe à décharge à haute pression Expired - Lifetime EP0479087B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9013735U 1990-10-02
DE9013735U DE9013735U1 (de) 1990-10-02 1990-10-02 Hochdruckentladungslampe

Publications (2)

Publication Number Publication Date
EP0479087A1 true EP0479087A1 (fr) 1992-04-08
EP0479087B1 EP0479087B1 (fr) 1995-12-20

Family

ID=6858004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91116145A Expired - Lifetime EP0479087B1 (fr) 1990-10-02 1991-09-23 Lampe à décharge à haute pression

Country Status (4)

Country Link
US (1) US5200669A (fr)
EP (1) EP0479087B1 (fr)
JP (1) JPH0499663U (fr)
DE (2) DE9013735U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009146751A1 (fr) * 2008-06-06 2009-12-10 Osram Gesellschaft mit beschränkter Haftung Passage de conducteur avec profil de feuille curviligne
EP2169704A1 (fr) * 2007-07-17 2010-03-31 Panasonic Corporation Lampe a decharge haute pression, unite de lampe employant la lampe a decharge haute pression, et dispositif d'affichage d'image a projection employant l'unite de lampe
EP2154706A3 (fr) * 2008-08-11 2010-11-10 Osram Gesellschaft mit beschränkter Haftung Feuille pour lampes et lampe électrique dotée d'une telle feuille ainsi que procédé de fabrication correspondant
DE10159379B4 (de) * 2000-12-05 2015-08-20 Koito Mfg. Co., Ltd. Bogenentladungsröhre mit keilförmigem Schlitz geringen Volumens zwischen Bogenentladungsröhrenkörper und Elektrode und Verfahren zur Herstellung derselben

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5754005A (en) * 1993-10-29 1998-05-19 General Electric Company Electric lamps containing electrical leads of a molybdenum and tungsten alloy
US5576598A (en) * 1995-08-31 1996-11-19 Osram Sylvania Inc. Lamp with glass sleeve and method of making same
US5793160A (en) * 1996-11-15 1998-08-11 Superior Quartz Products, Inc. Platform-based multiple foil high current electrode attachment for medium pressure quartz lamps
JP4388699B2 (ja) * 1998-08-13 2009-12-24 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 コーティングされた外部電流導体を有する電気ランプ
JP3118758B2 (ja) * 1998-10-19 2000-12-18 ウシオ電機株式会社 ランプ用傾斜機能材料製封止体およびランプ
JP3480364B2 (ja) * 1999-04-23 2003-12-15 ウシオ電機株式会社 ショートアーク型放電ランプ
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
JP3586607B2 (ja) 1999-12-28 2004-11-10 Ｎｅｃマイクロ波管株式会社 高圧放電灯
EP1143485A3 (fr) * 2000-04-03 2001-11-14 Matsushita Electric Industrial Co., Ltd. Lampes à décharge, procédé pour leur fabrication et unité de lampe
JP3591439B2 (ja) * 2000-09-21 2004-11-17 ウシオ電機株式会社 ショートアーク放電ランプ
JP3518533B2 (ja) * 2001-10-19 2004-04-12 ウシオ電機株式会社 ショートアーク型超高圧放電ランプ
US6661172B2 (en) 2002-01-11 2003-12-09 General Electric Company Electrode assembly and lamp with conductor foil
JP2004178894A (ja) * 2002-11-26 2004-06-24 Ushio Inc ショートアーク型放電ランプ
JP2004265753A (ja) * 2003-03-03 2004-09-24 Ushio Inc ショートアーク型超高圧放電ランプ
DE102004011555B3 (de) * 2004-03-08 2005-10-27 Schott Ag Gasentladungslampe
JP4544204B2 (ja) * 2005-08-08 2010-09-15 ウシオ電機株式会社 外部電極型放電ランプ、およびそのランプ装置
US20070035252A1 (en) * 2005-08-10 2007-02-15 Jurgen Becker Current bushing system for a lamp
DE102005046483A1 (de) * 2005-09-28 2007-03-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Entladungslampe
US20070205724A1 (en) * 2006-03-03 2007-09-06 Schaefer Raymond B Advanced surface discharge lamp systems
US7593289B2 (en) * 2006-04-17 2009-09-22 Phoenix Science & Technology, Inc. Reflectors and reflector light and sound source systems
JP4682216B2 (ja) * 2007-11-26 2011-05-11 パナソニック株式会社 高圧放電ランプ、それを用いたランプユニットおよびそのランプユニットを用いた投射型画像表示装置
DE102009048432A1 (de) * 2009-10-06 2011-04-07 Osram Gesellschaft mit beschränkter Haftung Gasentladungslampe
JP5365799B2 (ja) * 2009-10-23 2013-12-11 ウシオ電機株式会社 高圧放電ランプおよび高圧放電ランプの製造方法
GB0922076D0 (en) * 2009-12-17 2010-02-03 Ceravision Ltd Lamp
JP5840432B2 (ja) * 2011-09-21 2016-01-06 株式会社オーク製作所 放電ランプ
JP6727650B2 (ja) * 2016-09-01 2020-07-22 フェニックス電機株式会社 放電ランプの封止構造、およびそれを備える放電ランプ
DE102018207236A1 (de) * 2018-05-09 2019-11-14 Osram Gmbh Lagerungselement mit flächig ausgebildeter schicht

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Publication number Priority date Publication date Assignee Title
GB682376A (en) * 1951-01-25 1952-11-05 Hermann Eduard Krefft Improvements in or relating to lead-in seal for electrical discharge devices
GB685227A (en) * 1950-05-23 1952-12-31 Emi Ltd Improvements in or relating to a method and apparatus for reproducing magnetically recorded sound
DE1489616A1 (de) * 1964-11-12 1969-04-03 Westinghouse Electric Corp Gasentladungslampe
GB1231141A (fr) * 1968-01-24 1971-05-12
US4959587A (en) * 1989-01-13 1990-09-25 Venture Lighting International, Inc. Arc tube assembly

Family Cites Families (6)

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GB658227A (en) * 1948-07-29 1951-10-03 British Thomson Houston Co Ltd Improvements in and relating to quartz-to-metal seals
DE3427280C2 (de) * 1984-07-24 1986-06-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Metallhalogenid-Hochdruckentladungslampe
US4749905A (en) * 1985-11-15 1988-06-07 Kabushiki Kaisha Toshiba High pressure discharge lamp
JPS62143358A (ja) * 1985-12-17 1987-06-26 Toshiba Corp 高圧放電灯
JPS63241850A (ja) * 1987-03-30 1988-10-07 Toshiba Corp 高圧放電灯
JPS6451149A (en) * 1987-08-20 1989-02-27 Yanmar Agricult Equip Dehulling ratio control apparatus of huller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB685227A (en) * 1950-05-23 1952-12-31 Emi Ltd Improvements in or relating to a method and apparatus for reproducing magnetically recorded sound
GB682376A (en) * 1951-01-25 1952-11-05 Hermann Eduard Krefft Improvements in or relating to lead-in seal for electrical discharge devices
DE1489616A1 (de) * 1964-11-12 1969-04-03 Westinghouse Electric Corp Gasentladungslampe
GB1231141A (fr) * 1968-01-24 1971-05-12
US4959587A (en) * 1989-01-13 1990-09-25 Venture Lighting International, Inc. Arc tube assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10159379B4 (de) * 2000-12-05 2015-08-20 Koito Mfg. Co., Ltd. Bogenentladungsröhre mit keilförmigem Schlitz geringen Volumens zwischen Bogenentladungsröhrenkörper und Elektrode und Verfahren zur Herstellung derselben
EP2169704A1 (fr) * 2007-07-17 2010-03-31 Panasonic Corporation Lampe a decharge haute pression, unite de lampe employant la lampe a decharge haute pression, et dispositif d'affichage d'image a projection employant l'unite de lampe
EP2169704A4 (fr) * 2007-07-17 2012-03-28 Panasonic Corp Lampe a decharge haute pression, unite de lampe employant la lampe a decharge haute pression, et dispositif d'affichage d'image a projection employant l'unite de lampe
US8207673B2 (en) 2007-07-17 2012-06-26 Panasonic Corporation High-pressure discharge lamp, lamp unit using the same, and projection-type image display device using the lamp unit
WO2009146751A1 (fr) * 2008-06-06 2009-12-10 Osram Gesellschaft mit beschränkter Haftung Passage de conducteur avec profil de feuille curviligne
EP2154706A3 (fr) * 2008-08-11 2010-11-10 Osram Gesellschaft mit beschränkter Haftung Feuille pour lampes et lampe électrique dotée d'une telle feuille ainsi que procédé de fabrication correspondant

Also Published As

Publication number Publication date
DE9013735U1 (de) 1992-02-06
JPH0499663U (fr) 1992-08-28
EP0479087B1 (fr) 1995-12-20
DE59107116D1 (de) 1996-02-01
US5200669A (en) 1993-04-06

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