EP0479089A1 - Lampe à décharge à haute pression et procédé de fabrication - Google Patents

Lampe à décharge à haute pression et procédé de fabrication Download PDF

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Publication number
EP0479089A1
EP0479089A1 EP91116147A EP91116147A EP0479089A1 EP 0479089 A1 EP0479089 A1 EP 0479089A1 EP 91116147 A EP91116147 A EP 91116147A EP 91116147 A EP91116147 A EP 91116147A EP 0479089 A1 EP0479089 A1 EP 0479089A1
Authority
EP
European Patent Office
Prior art keywords
metal
power supply
pressure discharge
discharge lamp
sealing foils
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
EP91116147A
Other languages
German (de)
English (en)
Other versions
EP0479089B1 (fr
Inventor
Bernd Lewandowski
Dieter Franke
Walter Kiele
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 EP0479089A1 publication Critical patent/EP0479089A1/fr
Application granted granted Critical
Publication of EP0479089B1 publication Critical patent/EP0479089B1/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

Definitions

  • the invention relates to a high-pressure discharge lamp for lamp currents greater than 20 A according to the preamble of claim 1.
  • High-pressure discharge lamps of this type with a metal halide filling are used in particular for illuminating stages or for film and television recordings, where high luminous fluxes with daylight-like color temperature and very good color rendering are required.
  • Other high-pressure discharge lamps of this type with a pure mercury gas filling are used in particular in the production of electronic components.
  • a lamp with a metal halide fill is e.g. known from DE-PS 34 27 280.
  • the high-pressure discharge lamp from this patent has a gadolinium-holmium-dysprosium-halide filling and generates a luminous flux of 1,100,000 lm at an operating current of 65 A and a power consumption of 12,000 W.
  • the two electrodes designed in the form of pins are melted into the lamp necks in a gas-tight manner by means of a molybdenum sealing film.
  • the object of the invention is to provide a high-pressure discharge lamp, the electrode melts can be loaded with high operating currents without damage.
  • the electrode melts should have a simple process engineering structure in accordance with the requirements.
  • a high-pressure discharge lamp which has a structure in accordance with the characterizing features of claim 1. Further advantageous features of the lamp can be found in the subclaims.
  • the metal washers which are placed over the end of the electrode shaft and the power supply, give the entire structure of the piston neck very high stability.
  • the distribution of the lamp current over two, advantageously four, elongate sealing foils in each bulb neck results in a significantly lower current load for the individual sealing foil. If the sealing foils are arranged at equal intervals over the circumference of the two metal disks parallel to the longitudinal axis of each bulb neck, the neck is heated up very evenly when the lamp is in operation. In this way, overloads in the melting due to large temperature differences can be prevented.
  • the ends of the electrode shafts and the power supply lines as well as the metal disks which are melted into the piston necks can be partially or completely encased by a high-temperature-resistant metal foil provided with a surface profile.
  • the film advantageously consists of one of the metals from the group of molybdenum, tantalum or tungsten or an alloy of these metals and, depending on the wattage of the lamp, has a thickness of between 20 and 200 ⁇ m. Wrapping or covering with the profiled film prevents the metal parts from sticking and tightening with the quartz glass when melting and operating the lamp. Mechanical stresses and any cracks in the quartz glass when cooling down can thus be avoided.
  • the profiled foils also enable good axial alignment of the electrodes and power supplies.
  • the quartz glass cylinders of the piston necks, which were still loose before melting, are fixed by the foils, so that additional measures for clamping the quartz glass cylinders can be omitted.
  • the design of the lamp necks allows operating currents of up to 130 A without causing damage to the melts and shortening the average life of the lamp. With these high currents and power consumption of up to 24,000 W, high-pressure discharge lamps can be built that emit luminous fluxes of over 2 million lm with a metal halide filling.
  • the invention also relates to a method for producing a high-pressure discharge lamp, as claimed in the claims.
  • a hollow cylindrical outer tube made of quartz glass is first melted at the two ends lying in the axis after the rotationally symmetrical discharge space has been produced. Then a filler is formed by appropriately cutting and drilling a solid cylinder or by fusing several solid and hollow cylinders made of quartz glass with a circular cross-section, which essentially corresponds to the shape of the interior delimited by the two metal disks with the possibly protruding electrode end and power supply end and by the sealing foils as it is intended for the finished lamp. The metal disc with the electrode and the metal disc with the power supply are now plugged onto one end of this packing. The ends of the sealing foils are welded to the two metal washers.
  • the outer edge of the olive-shaped extended end of the attached tube is fused to the inner wall of the hollow cylindrical outer tube.
  • This seal allows the space between flush the hollow cylindrical outer tube and the packing several times with argon over the discharge space and then evacuate. Then the sealing foils are melted under a vacuum of 20 mbar argon between the hollow cylindrical outer tube and the packing. After the melting process, the outer tube is severed at the level of the free end of the power supply and the separated part is removed from the piston neck together with the fused tube which is placed over the power supply. Now the base can be fastened in a known manner on the free end of the piston neck and electrically connected to the power supply.
  • the lamp bulb 1 made of quartz glass consists of a largely cylindrical, rotationally symmetrical discharge space 2, on the two ends of which lie in the axis, a hollow cylindrical bulb neck 3, 4 is melted.
  • the two pin electrodes 5, 6 made of tungsten protrude into the discharge space 2 and are inserted with their shaft ends through a central hole in a circular cylindrical disk 7, 8 made of molybdenum and are soldered firmly by means of platinum solder.
  • the electrical connection of the pin electrodes 5, 6 to the bases 9, 10 of the type s 30 x 70, which are attached to the free ends of the piston necks 3, 4, is made by four band-shaped molybdenum sealing foils, of which only three foils 11 each to 16 are visible.
  • the sealing foils 11 to 16 are welded at one end to the disks 7, 8 through which the shaft ends of the electrodes 5, 6 are inserted.
  • the other ends of the sealing films 11 to 16 are each welded to a second disk, which is not visible here.
  • This disc made of molybdenum also has a circular cylindrical shape and a central hole through which one end of the power supply is inserted and soldered in place using platinum solder.
  • the other end of the respective power supply is electrically connected to the base 9, 10.
  • the sealing films 11 to 16 are gas-tight parallel to the longitudinal axis in the fully cylindrical piston necks 3, 4 melted down.
  • FIG. 2 shows the structure of a piston neck before the sealing films melt.
  • the piston neck has a hollow cylindrical outer tube 17 made of quartz glass, which is fused to the rotationally symmetrical discharge space 2.
  • a packing made of quartz glass is pushed, which consists of a central solid cylinder 18, two short hollow cylinder pieces 19, 20 melted onto the two ends of the solid cylinder 18 and another, pushed and fused over the solid cylinder 18 and the two hollow cylinder pieces 19, 20 Hollow cylinder 21 is composed.
  • a disk 8 made of molybdenum with the pin electrode 6 made of tungsten is plugged onto the other end of the packing and the other disk 22 made of molybdenum with the current supply 23 made of tungsten is plugged into the other end.
  • the dimensions of the bores in the short hollow cylinder pieces 19, 20 essentially correspond to the dimensions of the ends of the pin electrode 6 or the power supply 23 inserted through the disks 8, 22 Ends of the pin electrode 6 and the power supply 23 to prevent the piston neck from being blown up when heated due to the larger expansion coefficient of the metal parts.
  • the four sealing foils made of molybdenum, of which only two 14, 16 are visible here, run parallel to the axis of the piston neck between the outer tube 17 and the filler body and are welded at their ends to the disks 8, 22.
  • Another hollow cylindrical quartz glass tube 24 is plugged into the power supply 23, whose bore diameter corresponds to the diameter of the power supply 23.
  • the quartz glass tube 24 has an olive-shaped extension 25 which touches the inner wall of the outer tube 17.
  • the disc 8 rests on a further hollow cylindrical tube piece 26 made of quartz glass, which is melted into the transition from the discharge space 2 into the outer tube 17. It ensures that the electrode 6 is centered during melting.
  • the piston neck is shown in cross-section at point AB before the melting, looking in the direction of the discharge space.
  • the figure shows the hollow cylindrical outer tube 17 and the filling body composed of the hollow cylinder 21 and the solid cylinder 18. In between, part of the molybdenum disk 8 and the four molybdenum sealing foils 14, 15, 16, 27 distributed evenly over the circumference of the disk 8 can be seen.
  • FIG. 4 shows a bulb neck of a high-pressure mercury vapor discharge lamp according to the invention with a power consumption of 2,000 W.
  • the bulb neck has a hollow cylindrical outer tube 28 made of quartz glass, into which an electrode system is melted in a gas-tight manner.
  • the electrode system has an electrode head 29 made of tungsten, which is soldered to the electrode shaft 30, also made of tungsten.
  • the free end of the electrode shaft 30 is inserted and soldered into a central opening of a circular cylindrical molybdenum disk 31 with a thickness of 5 mm.
  • the ends of four band-shaped molybdenum sealing foils, of which only two foils 32, 33 are visible, are welded to the circumferential surface of the molybdenum disk 31 along the circumference at equal intervals.
  • the other ends of the molybdenum sealing foils 32, 33 are welded to a second circular-cylindrical molybdenum disk 34 of 5 mm thickness, through the central bore of which a power supply 35 made of molybdenum is inserted and soldered.
  • the empty space between the two molybdenum disks 31, 34 is filled by two hollow cylinders 36, 37 made of quartz glass, which coaxially envelop the end of the power supply 35 which projects beyond the molybdenum disk 34 in the direction of the discharge space.
  • the outer hollow cylinder 37 is closed at its end facing the discharge space.
  • the four sealing foils 32, 33 are melted gas-tight between the outer surface of the outer hollow cylinder 37 and the outer tube 28.
  • the end of the power supply 35 is filled with a thin, profiled molybdenum foil 38 which completely surrounds the outer surface of the power supply 35 in this area.
  • the other end of the power supply 35 and the electrode shaft 30 facing away from the discharge space are surrounded in the region of the piston neck by further hollow cylinders 39, 40 made of quartz glass, which fuse with the outer tube 28 during the melting process. Direct contact of the electrode shaft 30 and the power supply 35 with the hollow cylinders 39, 40 is prevented by two further profiled molybdenum foils 41, 42 which completely surround the outer surface of the electrode shaft 30 and the power supply 35 in this area.
  • the outer surfaces and the base surfaces of the molybdenum disks 31, 34 facing the hollow cylinders 39 and 40 are also covered by a thin, profiled molybdenum foil 43 to 46.
  • FIG. 5 shows a section through the piston neck, as shown in FIG. 4, at position AB in the direction of the discharge space.
  • the figure shows the hollow cylindrical outer tube 28 which surrounds the profiled molybdenum foil 44, the four molybdenum sealing foils 32, 33, 47, 48, the molybdenum disc 34 and the power supply 35.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
EP91116147A 1990-10-02 1991-09-23 Lampe à décharge à haute pression et procédé de fabrication Expired - Lifetime EP0479089B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4031117 1990-10-02
DE4031117A DE4031117A1 (de) 1990-10-02 1990-10-02 Hochdruckentladungslampe und verfahren zur herstellung der lampe

Publications (2)

Publication Number Publication Date
EP0479089A1 true EP0479089A1 (fr) 1992-04-08
EP0479089B1 EP0479089B1 (fr) 1995-11-22

Family

ID=6415414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91116147A Expired - Lifetime EP0479089B1 (fr) 1990-10-02 1991-09-23 Lampe à décharge à haute pression et procédé de fabrication

Country Status (4)

Country Link
US (1) US5304892A (fr)
EP (1) EP0479089B1 (fr)
JP (1) JPH04262362A (fr)
DE (2) DE4031117A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19749908A1 (de) 1997-11-11 1999-05-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Elektrodenbauteil für Entladungslampen
DE19825004A1 (de) * 1998-04-24 1999-10-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe
KR100712745B1 (ko) * 1998-12-21 2007-04-30 코닌클리즈케 필립스 일렉트로닉스 엔.브이. 전기 램프
DE19933154B4 (de) * 1999-07-20 2006-03-23 W.C. Heraeus Gmbh Entladungslampe
JP3964643B2 (ja) * 2001-09-28 2007-08-22 シャープ株式会社 光源装置及び表示装置
JP3709560B2 (ja) * 2002-01-21 2005-10-26 日本碍子株式会社 高圧放電灯用組み立て体および高圧放電灯
DE10325553A1 (de) * 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Zweiseitig verschlossene Lampe
WO2005001880A2 (fr) * 2003-06-30 2005-01-06 Koninklijke Philips Electronics N.V. Lampe electrique
JP4963821B2 (ja) * 2005-10-18 2012-06-27 株式会社オーク製作所 放電灯の封止構造
DE112007003320A5 (de) * 2007-03-12 2010-01-28 Osram Gesellschaft mit beschränkter Haftung Entladungslampe und Verfahren zum Herstellen einer Entladungslampe
JP5200448B2 (ja) * 2007-08-08 2013-06-05 ウシオ電機株式会社 放電ランプ
JP5076821B2 (ja) * 2007-11-14 2012-11-21 ウシオ電機株式会社 管球における溶融接合構造体およびその製造方法

Citations (6)

* Cited by examiner, † Cited by third party
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
DE1489616A1 (de) * 1964-11-12 1969-04-03 Westinghouse Electric Corp Gasentladungslampe
GB1230955A (fr) * 1969-03-19 1971-05-05
GB1231141A (fr) * 1968-01-24 1971-05-12
DE1589262B2 (de) * 1966-03-16 1975-11-06 N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) Elektrode für eine Hochdruck-Gas- und/oder -Dampfentladungslampe
US4959587A (en) * 1989-01-13 1990-09-25 Venture Lighting International, Inc. Arc tube assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315116A (en) * 1965-10-22 1967-04-18 Norman C Beese High intensity short-arc lamp having bi-metallic electrode leads
US3675068A (en) * 1970-09-10 1972-07-04 Duro Test Corp Seal structures for electric discharge lamps
JPS5714362B2 (fr) * 1974-03-18 1982-03-24
JPS5994355A (ja) * 1982-11-19 1984-05-31 Hakko:Kk 放電灯シ−ル装置
DE3427280C2 (de) * 1984-07-24 1986-06-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Metallhalogenid-Hochdruckentladungslampe
JPS61168855A (ja) * 1985-01-23 1986-07-30 Wakomu:Kk 放電灯シ−ル装置
JPS63241850A (ja) * 1987-03-30 1988-10-07 Toshiba Corp 高圧放電灯

Patent Citations (6)

* Cited by examiner, † Cited by third party
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
DE1489616A1 (de) * 1964-11-12 1969-04-03 Westinghouse Electric Corp Gasentladungslampe
DE1589262B2 (de) * 1966-03-16 1975-11-06 N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) Elektrode für eine Hochdruck-Gas- und/oder -Dampfentladungslampe
GB1231141A (fr) * 1968-01-24 1971-05-12
GB1230955A (fr) * 1969-03-19 1971-05-05
US4959587A (en) * 1989-01-13 1990-09-25 Venture Lighting International, Inc. Arc tube assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRA- TED, El Sektion, Woche E 12, 5. Mai 1982 DERWENT PUBLICATIONS LTD., London, UK, X 26 Seite 25 *

Also Published As

Publication number Publication date
EP0479089B1 (fr) 1995-11-22
DE59106938D1 (de) 1996-01-04
DE4031117A1 (de) 1992-04-09
JPH04262362A (ja) 1992-09-17
US5304892A (en) 1994-04-19

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