WO2008119375A1 - Lampe à décharge, notamment lampe à décharge haute pression - Google Patents

Lampe à décharge, notamment lampe à décharge haute pression Download PDF

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Publication number
WO2008119375A1
WO2008119375A1 PCT/EP2007/052996 EP2007052996W WO2008119375A1 WO 2008119375 A1 WO2008119375 A1 WO 2008119375A1 EP 2007052996 W EP2007052996 W EP 2007052996W WO 2008119375 A1 WO2008119375 A1 WO 2008119375A1
Authority
WO
WIPO (PCT)
Prior art keywords
discharge lamp
discharge
structuring
vessel
lamp according
Prior art date
Application number
PCT/EP2007/052996
Other languages
German (de)
English (en)
Inventor
Simon Lankes
Markus Stange
Original Assignee
Patent-Treuhand-Gesellschaft für elektrische Glühlampen 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 für elektrische Glühlampen mbH filed Critical Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
Priority to PCT/EP2007/052996 priority Critical patent/WO2008119375A1/fr
Publication of WO2008119375A1 publication Critical patent/WO2008119375A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
    • 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

  • Discharge lamp in particular high-pressure discharge lamp
  • the present invention relates to a discharge lamp, in particular a high-pressure discharge lamp.
  • Discharge lamps in particular high-pressure discharge lamps, comprise a discharge vessel and electrodes which extend into a discharge space of the discharge vessel.
  • the electrodes are rod-shaped and also partially embedded in the vessel necks Entladungsgefä ⁇ SLI.
  • a discharge vessel is generally formed of a glass structure or a glass-like material, the electrodes being made of metal. Due to statically occurring weakenings of the glass structure, in particular crack formation in the region of the electrodes, such discharge lamps may burst due to the internal pressure of the lamp.
  • the different coefficients of expansion of glass, materials used on the one hand and metal on the other hand when cool down effect ⁇ len of the lamp to be manufactured during the manufacturing process after the seizures of the glass at the electrodes, these cracks. By this cracking or through these cracks during the manufacturing process, the Ver ⁇ stresses are reduced at the transition metal-glass ( ⁇ relief cracks).
  • the relief jumps in the glass can be in the worst case in areas where the glass during the Operation is greatly distorted, whereby the probability of a lamp blaze is relatively high.
  • a discharge lamp according to the invention comprises a discharge vessel with at least one vessel neck.
  • one electrode is arranged with a first portion, wherein the electrode extends with a second portion in a discharge space of the discharge vessel.
  • the first portion of the electrode is at least partially structured on its outer side.
  • the defined generating relief jumps during the embedding process and thus allows during the manufacturing process of Entla pressure discharge lamp can.
  • Such relief jumps occur in particular at geometric disturbances, such as they are formed by edges and tips on.
  • the relief jumps can be defined in regions which are uncritical for the stability of the lamp.
  • the first portion is structured on its outer side over a length smaller than the total length of this first portion.
  • the first section starting from the side remote from the Entla ⁇ formation space structured end up to a length less than the overall length of the first portion.
  • the first portion up to a maximum length of two thirds of the total length of the first portion of starting is structured from the side remote from the discharge space ⁇ end.
  • the front DRIT ⁇ tel of the first portion which faces the discharge space, and is still embedded in the vessel neck is thus free of such a defined structural generated turing.
  • the dimensions of the struc ⁇ turing of the partial area are dependent on lamp type specified differently. Both the extension, over which length this structuring is produced, and the local attachment of the structuring on the first subarea are preferably provided depending on the lamp type. As a result, an individual and optimized design of the structuring can be guaranteed depending on the type of lamp, thereby enabling lamp-type-specific generation of relief jumps at the respectively most suitable uncritical regions.
  • the structuring of the first sectionbe ⁇ kingdom includes recesses. These may be formed with depths of about 0.1 mm to about 0.5 mm in the outer side of the first portion of the electrode. Likewise, however, it can also be provided that the structuring has elevations which, as it were, then extend outward from the outside of the first partial area. Again, a level variation with the above-mentioned concrete millimeter values can be provided. Likewise, a combination of depressions and elevations may be provided as structuring.
  • the structuring preferably comprises at least partially circumferential rings. This then as groove-like recesses in Materialaus- the outside of the first portion from ⁇ formed structuring may have diverse shapes in a sectional view. In a sectional representation, for example, an angular shape of the depression, a pointed shape (V-shape) or a U-shaped shape can be provided. However, this is merely exemplary and suitable te disturbances or structuring on the electrode surface in the first portion may be formed varied in terms of shaping, dimensioning and location.
  • Trained as a recess circumferential rings in the longitudinal ⁇ direction of the electrode can be arranged equidistant from each other.
  • the structuring may also include holes, in particular blind holes and thus non-continuous holes. Such holes may be evenly distributed or formed in a specific pattern in the first portion of the electrode.
  • the electrode is rod-shaped and designed, for example, tungsten.
  • FIG. 1 shows a schematic representation of a erfindungsge ⁇ MAESSEN discharge lamp.
  • Fig. 2 is an enlarged partial section of the discharge lamp ⁇ shown in FIG. 1;
  • FIG. 3 shows a first exemplary embodiment of a structured electrode of a discharge lamp according to FIGS. 1 and 2;
  • Fig. 4 is a perspective sectional view of the embodiment in Fig. 3;
  • Fig. 5 shows another embodiment of a struc tured ⁇ electrode of a discharge lamp according to Fig. 1 and 2.
  • FIG. 1 shows a schematic illustration of a discharge lamp 1 designed as a high-pressure discharge lamp.
  • the discharge lamp 1 comprises a discharge vessel 2, which has a central portion 22, connect to the two GE ⁇ genüberelled vessel necks 21 and 23.
  • FIG. The discharge vessel 2 is formed of quartz glass. Inner ⁇ half of the middle part 22 is a discharge space 3 forms, in which two electrodes 4 and 5, which are rod-shaped in the embodiment horrre ⁇ ck.
  • the electrode 4 further extends into the bulbous neck 21 and is sealed therein gas-tight. In a corresponding manner, the electrode 5 is sealed gastight in the vessel neck 23.
  • the electrodes 4 and 5 are formed of a metal and may be, for example, tungsten.
  • Both electrodes 4 and 5 thus extend with a first partial area into a vessel neck 21 or 23 and in each case with a second partial area into the discharge space 3.
  • the respective first portions of the electrodes 4 and 5 are at least partially constructive ⁇ tured on their outer sides.
  • FIG. 1 An enlarged section of the discharge lamp 1 according to FIG. 1 is shown in FIG.
  • a current-carrying molybdenum foil 6 is a ⁇ melted, which is connected to the electrode.
  • the rod-shaped electrode 4 is embedded with a first Partbe ⁇ rich 41 in the vessel neck 21 or sealed gastight. This first portion 41 has a length 11. With a second portion 42, the electrode 4 extends over a length 12 in the Entla ⁇ formation space. 3
  • the structure is thus, starting from one of the molybdenum foil 6 facing end 41a of the first portion 41 to the beginning of the critical Range I forms ⁇ .
  • Characterized the cracks 7 are defined only produced except ⁇ half the critical range I in the first portion 41 of the electrode. 4 This is an area that is not critical for possible lamp burst in the operation of the discharge lamp 1.
  • the discharge lamp 1 at the Be ⁇ area of the vessel neck 23 is formed with the electrode. 5
  • FIG. 3 shows by way of example a first embodiment of a structuring of the electrode 4 in the first subregion 41.
  • the structuring is formed essentially over the length 111.
  • the structuring can also be formed over a shorter or longer length than the length 111. Likewise it can be provided that the structuring does not start immediately at the end 41a but only in Direction of the longitudinal axis A further inside starting ⁇ out forms.
  • the structuring comprises a plurality of depressions which are designed as completely circumferential rings 8a, 8b, 8c and 8d. These grooves or rings 8a to 8d are in the direction of the longitudinal axis A in the exemplary embodiment disposed equidistant from ⁇ today.
  • FIG. 4 shows a sectional representation through the embodiment according to FIG. 3.
  • the rings 8a to 8d designed as recesses have a polygonal shape.
  • the ge ⁇ showed rectangular shape of a recess in cross section may also have an arcuate contour shape or a tapered inward contour profile.
  • FIG. 5 shows, in a schematic representation, a further embodiment of a structuring of the portion 41 of the electrode 4.
  • a plurality of holes 9 are formed circumferentially, which are not continuous, but are designed as blind holes.
  • the holes 9 may be formed arbitrarily distributed on the outer side 41b. Likewise, however, a defined pattern through the holes 9 can also be predetermined. Diameter and depth of the holes 9 as well as the height and depth of the rings 8a to 8d can be used in a variety of ways variie ⁇ ren. In particular, depending on the lamp type, both the dimensions and the number of structuring be predetermined. Likewise, depending on the lamp type, the length of the structuring as well as the local attachment of the structuring may be formed in the partial region 41 of the electrode 4.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L'invention concerne une lampe à décharge comportant une cuve à décharge (2) présentant au moins un collet (21, 23) dans lequel une électrode (4, 5) est disposée avec une première partie (41), et s'étend dans une chambre à décharge (3) de la cuve à décharge (2) avec une deuxième partie (42). La première partie (41) est au moins partiellement structurée sur son côté extérieur (41b).
PCT/EP2007/052996 2007-03-29 2007-03-29 Lampe à décharge, notamment lampe à décharge haute pression WO2008119375A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/052996 WO2008119375A1 (fr) 2007-03-29 2007-03-29 Lampe à décharge, notamment lampe à décharge haute pression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/052996 WO2008119375A1 (fr) 2007-03-29 2007-03-29 Lampe à décharge, notamment lampe à décharge haute pression

Publications (1)

Publication Number Publication Date
WO2008119375A1 true WO2008119375A1 (fr) 2008-10-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/052996 WO2008119375A1 (fr) 2007-03-29 2007-03-29 Lampe à décharge, notamment lampe à décharge haute pression

Country Status (1)

Country Link
WO (1) WO2008119375A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2004204A (en) * 2009-02-09 2010-08-10 Ushio Electric Inc High pressure discharge lamp.
WO2010100034A1 (fr) * 2009-03-03 2010-09-10 Osram Gesellschaft mit beschränkter Haftung Lampe électrique rendue étanche, et son procédé de production
EP2254144A3 (fr) * 2009-05-20 2011-06-08 Koito Manufacturing Co., Ltd. Lampe de décharge de véhicule
WO2011073862A1 (fr) * 2009-12-18 2011-06-23 Koninklijke Philips Electronics N.V. Électrode destinée à être utilisée dans une lampe
WO2013046085A1 (fr) * 2011-09-30 2013-04-04 Koninklijke Philips Electronics N.V. Lampe à décharge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9207816U1 (fr) * 1992-06-10 1992-08-20 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De
EP1465235A2 (fr) * 2003-03-25 2004-10-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge
WO2006082539A2 (fr) * 2005-02-04 2006-08-10 Koninklijke Philips Electronics N.V. Lampe electrique a tiges d'electrode dotees de rainures longitudinales
DE102005013759A1 (de) * 2005-03-22 2006-09-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe mit Stromzuführung und Elektrode
WO2007055958A2 (fr) * 2005-11-09 2007-05-18 General Electric Company Lampe à décharge à haute intensité avec contrôle de fissurage amélioré et procédé de fabrication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9207816U1 (fr) * 1992-06-10 1992-08-20 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De
EP1465235A2 (fr) * 2003-03-25 2004-10-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge
WO2006082539A2 (fr) * 2005-02-04 2006-08-10 Koninklijke Philips Electronics N.V. Lampe electrique a tiges d'electrode dotees de rainures longitudinales
DE102005013759A1 (de) * 2005-03-22 2006-09-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe mit Stromzuführung und Elektrode
WO2007055958A2 (fr) * 2005-11-09 2007-05-18 General Electric Company Lampe à décharge à haute intensité avec contrôle de fissurage amélioré et procédé de fabrication

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2004204A (en) * 2009-02-09 2010-08-10 Ushio Electric Inc High pressure discharge lamp.
US8115389B2 (en) 2009-02-09 2012-02-14 Ushio Denki Kabushiki Kaisha High pressure discharge lamp
WO2010100034A1 (fr) * 2009-03-03 2010-09-10 Osram Gesellschaft mit beschränkter Haftung Lampe électrique rendue étanche, et son procédé de production
CN102341886A (zh) * 2009-03-03 2012-02-01 奥斯兰姆有限公司 带有密封件的电灯和制造方法
EP2254144A3 (fr) * 2009-05-20 2011-06-08 Koito Manufacturing Co., Ltd. Lampe de décharge de véhicule
WO2011073862A1 (fr) * 2009-12-18 2011-06-23 Koninklijke Philips Electronics N.V. Électrode destinée à être utilisée dans une lampe
US9653280B2 (en) 2009-12-18 2017-05-16 Koninklijke Philips N.V. Electrode for use in a lamp
WO2013046085A1 (fr) * 2011-09-30 2013-04-04 Koninklijke Philips Electronics N.V. Lampe à décharge
US9093256B2 (en) 2011-09-30 2015-07-28 Koninklijke Philips N.V. Discharge lamp

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