EP0321867B1 - Lampe à décharge à haute pression - Google Patents

Lampe à décharge à haute pression Download PDF

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Publication number
EP0321867B1
EP0321867B1 EP88121024A EP88121024A EP0321867B1 EP 0321867 B1 EP0321867 B1 EP 0321867B1 EP 88121024 A EP88121024 A EP 88121024A EP 88121024 A EP88121024 A EP 88121024A EP 0321867 B1 EP0321867 B1 EP 0321867B1
Authority
EP
European Patent Office
Prior art keywords
outer bulb
discharge lamp
pressure discharge
cap
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.)
Expired - Lifetime
Application number
EP88121024A
Other languages
German (de)
English (en)
Other versions
EP0321867A2 (fr
EP0321867A3 (fr
Inventor
Manfred Gaugel
Rolf Kiesel
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 EP0321867A2 publication Critical patent/EP0321867A2/fr
Publication of EP0321867A3 publication Critical patent/EP0321867A3/fr
Application granted granted Critical
Publication of EP0321867B1 publication Critical patent/EP0321867B1/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
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H01J5/56—Shape of the separate part
    • 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

Definitions

  • the invention relates to a high-pressure discharge lamp according to the preamble of claim 1.
  • Such lamps usually have a relatively low power (order of magnitude 100 W) and are suitable, for example, for indoor lighting. For various reasons, however, the fitting of car headlights with these lamps has become the focus of interest.
  • EP-PA 86 305 398 a high-pressure metal vapor discharge lamp for motor vehicle headlights, which is to be capped on one side, is known, in which the power supply led to the end of the discharge vessel squeezed on both sides is arranged inside the outer bulb.
  • a heating element is also accommodated in the outer bulb filled with nitrogen.
  • a disadvantage of this arrangement is that the diameter of the outer bulb and thus also the base must be dimensioned relatively generously in order to be able to accommodate the recirculated power supply.
  • flashovers can easily occur between the two adjacent power supply lines when the lamp is ignited, since high voltage is required for this.
  • motor vehicle discharge lamps with a base on one side which use discharge vessels that are pinched on both sides without an outer bulb (DE-OS 33 41 846).
  • the power supply connected to the end of the discharge vessel remote from the base is in this case led back along the discharge vessel to the base.
  • the ignition behavior of the lamp is problematic since the high voltage required for this can easily lead to flashovers between the unprotected power supplies.
  • the free end of the discharge vessel, which is remote from the base is not supported and is therefore insufficiently protected against vibrations.
  • the invention is able to combine the advantages of the two above-described embodiments without having the disadvantages.
  • the outer bulb facilitates the handling of the lamp and offers protection against an explosion of the discharge vessel and protection against contact.
  • the second power supply is advantageously connected to ground.
  • the arrangement according to the invention makes it possible to keep the dimensions of the lamp very small, which is in keeping with the trend towards small headlights.
  • the outer bulb offers an elegant possibility to apply an optical coating, for example a possible shading layer and / or a colored layer.
  • the second power supply is particularly advantageously divided into two, since this facilitates the manufacture and adjustment of the lamp.
  • the outer bulb and discharge vessel are made of different materials with very different coefficients of thermal expansion (for example hard glass or quartz glass), it is advantageous to provide the second power supply within the outer bulb with an expansion loop.
  • the longitudinal axis of the outer bulb is slightly displaced parallel to the longitudinal axis of the discharge vessel (cf. FIG. 2).
  • the shift is in the order of 0.5 to 1 mm.
  • the pinch seal of the discharge vessel and the outer bulb are rotated by 90 ° to save space.
  • FIGS. 1 and 2 The embodiment of a high-pressure discharge lamp according to the invention shown in FIGS. 1 and 2, which is preferably suitable for installation in motor vehicle headlights (with the lamp axis lying horizontally), is distinguished by particular simplicity in terms of production technology off, since all four melts on the lamp are made using the same technique (pinch seal).
  • the pump tip attached to the side can be optically disruptive.
  • the glass mass concentrated in the pinch seal at the end remote from the base due to the long "lever path" can make it more difficult to suppress vibrations.
  • FIG. 3 shows a second preferred embodiment of the high-pressure discharge lamp according to the invention.
  • the construction of this lamp corresponds almost completely to the lamp shown in FIGS. 1 and 2.
  • the same features are provided with a 30 reference number.
  • the second end 39 of the outer bulb 32 (made of tempered glass) remote from the base is shaped into a dome.
  • the pump tip 40 is now arranged in the center of the dome and thus lies in the lamp axis.
  • the melting part 49 of the second power supply 48 is melted directly into the pump tip 40. With this manufacturing technique, care must be taken that the sealing section is sufficiently long, which is why the pump tip 40 must not be melted too short.
  • molybdenum or tungsten can be used as the material for the melting part 49 to adapt to the coefficient of thermal expansion.
  • an iron-nickel wire which may be covered with copper (F-wire) is also possible.
  • the longitudinal axis of the discharge vessel is again slightly shifted against the longitudinal axis of the outer bulb.
  • any optical interference from the pump tip is avoided.
  • this arrangement has a particularly favorable effect on the vibration behavior, since a mass concentration - as it represents a pinch seal - is avoided at a great distance from the "pivot point".
  • Another advantage is that with this arrangement the appearance of the discharge lamp comes very close to the appearance of a conventional automotive halogen incandescent lamp.
  • any anti-dazzle device is arranged separately in the headlight (e.g. in the form of an aperture).
  • the outer bulb is provided on a part of its circumference with a shading layer, which acts with respect to a headlight as a dimming means for producing dipped beam. In order to avoid any shadowing from the second power supply, this layer is applied in particular where the second power supply is returned along the outer bulb.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (13)

  1. Lampe à décharge à haute pression (1;31) ayant un culot d'un seul côté et comportant les caractéristiques suivantes :
    - une enceinte de décharge (3;33) à pincement de deux côtés, qui définit l'axe de la lampe et qui contient, en plus d'un remplissage de gaz rares, de métaux et d'halogénures métalliques, deux électrodes (4) qui s'étendent axialement et dont la liaison électrique avec l'extérieur s'effectue respectivement par l'intermédiaire d'une tige (5), d'une feuille (6) et d'une entrée de courant électrique (7a,7b; 37a,73b);
    - une ampoule extérieure cylindrique (2;32) comportant deux extrémités (8,9; 38,39), au moins la première extrémité (8; 38) étant fermée d'une manière étanche au vide au moyen d'un pincement et l'ampoule extérieure étant dirigée approximativement dans l'axe de la lampe;
    - un culot (12;42), qui est fixé à la première extrémité (8;38) de l'ampoule extérieure cylindrique (2;32); et
    - deux entrées de courant (11,18;41,48), qui maintiennent l'enceinte de décharge (3;33) et relient respectivement une entrée de courant électrique (7a, 7b; 37a,37b) de l'enceinte de décharge à un élément de contact du culot (12;42), la première ou la seconde entrée de courant (11,18; 41,48) étant reliée à l'entrée de courant (7a,7b; 37a,37b) qui sort du pincement proche du culot ou éloigné du culot,
    caractérisé par le fait que la seconde entrée de courant (18;48) sort à peu près, par la seconde extrémité (9;39), éloignée du culot, de l'ampoule extérieure et revient au culot (12;42) à l'extérieur de l'ampoule extérieure (2;32).
  2. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait qu'un vide est établi dans l'ampoule extérieure (2;32).
  3. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que l'axe longitudinal de l'ampoule extérieure (2:32) est légèrement décalé parallèlement par rapport à l'axe de la lampe.
  4. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la seconde entrée de courant (18;48) est composée de deux parties, comprenant une partie scellée par fusion (19;49), qui traverse l'extrémité (9;49), éloignée du culot, de l'ampoule extérieure, et une partie de retour (20;50), qui relie la partie scellée par fusion (19;49) à l'élément de contact du culot (12;42).
  5. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la partie de retour (20;50) est entourée, au moins sur une partie de sa longueur, d'un tube capillaire (24;54).
  6. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que le pourtour de l'ampoule extérieure est revêtu au moins partiellement d'une couche active du point de vue optique.
  7. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la seconde entrée de courant (18:48) possède une boucle de dilatation (21:51) à l'intérieur de la lampe extérieure (2;31) dans la zone située entre l'entrée de courant (7b;37b), qui est éloignée du culot, et la seconde extrémité (9;39) de l'ampoule extérieure
    qui est éloignée du culot.
  8. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la seconde entrée de courant (18;48) possède une boucle de dilatation (23;53), à l'extérieur de l'ampoule extérieure (2;32).
  9. Lampe à décharge à haute pression suivant les revendications 7 et 8, caractérisée par le fait que la seconde entrée de courant (18;48) possède une boucle de dilatation (21:51) et une boucle de dilatation (23;53), qui sont respectivement à l'intérieur et à l'extérieur de l'ampoule extérieure (2;32).
  10. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la seconde extrémité (9) de l'ampoule extérieure (2) , qui est éloignée du culot, est fermée d'une manière étanche au vide au moyen d'un élément d'étanchéité à pincement, que traverse la seconde entrée de courant (18).
  11. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la seconde extrémité (39) de l'ampoule extérieure (32) , qui est éloignée du culot, a la forme d'une coupelle, dans laquelle un queusot (40) est disposé sur l'axe de la lampe, la seconde entrée de courant (48) étant scellée par fusion directement dans le queusot (40).
  12. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que l'ampoule extérieure (2;32) est en verre dur.
  13. Lampe à décharge à haute pression suivant la revendication 12, caractérisée par le fait que le remplissage contient du sodium.
EP88121024A 1987-12-22 1988-12-15 Lampe à décharge à haute pression Expired - Lifetime EP0321867B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3743627 1987-12-22
DE19873743627 DE3743627A1 (de) 1987-12-22 1987-12-22 Hochdruckentladungslampe

Publications (3)

Publication Number Publication Date
EP0321867A2 EP0321867A2 (fr) 1989-06-28
EP0321867A3 EP0321867A3 (fr) 1991-01-02
EP0321867B1 true EP0321867B1 (fr) 1994-03-30

Family

ID=6343313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121024A Expired - Lifetime EP0321867B1 (fr) 1987-12-22 1988-12-15 Lampe à décharge à haute pression

Country Status (2)

Country Link
EP (1) EP0321867B1 (fr)
DE (2) DE3743627A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5220235A (en) * 1990-04-20 1993-06-15 Koito Manufacturing Co., Ltd. Discharge lamp device
GB2245417B (en) * 1990-04-20 1994-06-08 Koito Mfg Co Ltd Discharge lamp device
KR100302532B1 (ko) * 1992-05-11 2001-11-22 요트.게.아. 롤페즈 캡형전기램프
DE9207073U1 (de) * 1992-05-25 1992-08-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Einseitig gesockelte Hochdruckentladungslampe
JP2761155B2 (ja) * 1992-07-08 1998-06-04 株式会社小糸製作所 自動車用灯具の光源用放電ランプ装置
JPH08162007A (ja) * 1994-12-06 1996-06-21 Koito Mfg Co Ltd 放電ランプ装置
DE10015558C2 (de) * 2000-03-30 2002-03-14 Heraeus Noblelight Gmbh Optischer Strahler
DE102005007659A1 (de) * 2005-02-19 2006-08-24 Hella Kgaa Hueck & Co. Brenner für eine Gasentladungslampe und Verfahren zur Herstellung des Brenners

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110833A (en) * 1961-02-21 1963-11-12 Westinghouse Electric Corp Multiple envelope high pressure mercury vapor discharge lamp
US3662203A (en) * 1969-05-20 1972-05-09 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure saturated metal vapor, preferably sodium or metal halide vapor discharge lamp
NL7011321A (fr) * 1970-07-31 1972-02-02
US4254355A (en) * 1978-09-11 1981-03-03 General Electric Company Ceramic arc tube mounting
DE3412489A1 (de) * 1984-04-03 1985-10-03 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Einseitig gesockelte hochdruckentladungslampe

Also Published As

Publication number Publication date
EP0321867A2 (fr) 1989-06-28
DE3888808D1 (de) 1994-05-05
DE3743627A1 (de) 1989-07-06
EP0321867A3 (fr) 1991-01-02

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