WO2007138090A1 - Lampe à décharge et procédé de réalisation d'une liaison entre une ampoule de décharge et une tige de maintien pour une électrode d'une lampe à décharge - Google Patents

Lampe à décharge et procédé de réalisation d'une liaison entre une ampoule de décharge et une tige de maintien pour une électrode d'une lampe à décharge Download PDF

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Publication number
WO2007138090A1
WO2007138090A1 PCT/EP2007/055284 EP2007055284W WO2007138090A1 WO 2007138090 A1 WO2007138090 A1 WO 2007138090A1 EP 2007055284 W EP2007055284 W EP 2007055284W WO 2007138090 A1 WO2007138090 A1 WO 2007138090A1
Authority
WO
WIPO (PCT)
Prior art keywords
discharge vessel
discharge
vessel
discharge lamp
holding
Prior art date
Application number
PCT/EP2007/055284
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
Publication of WO2007138090A1 publication Critical patent/WO2007138090A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/32—Sealing leading-in conductors
    • H01J9/323—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device
    • H01J9/326—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device making pinched-stem or analogous seals
    • 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 present invention relates to a method for ⁇ forming a connection between a discharge and a support rod for an electrode of a discharge ⁇ lamp and a method for producing such a discharge lamp.
  • the invention also relates to a corresponding 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 mounted on support rods or power supply lines are connected at designated areas which fäß with the Entladungsge ⁇ .
  • the discharge vessels are generally made of a glass structure or a glass-like material, wherein the support rods or core pins are formed of metal. Due to static occurring weakening of the glass structure such discharge lamps, in particular in the area of the core pin due to the internal pressure of the lamp plat ⁇ zen.
  • the different coefficients of expansion of glass, materials used on the one hand and metal walls ⁇ hand cause the cooling of the lamp to be manufactured during the manufacturing process after the seizures of the glass to the support rods, this cracking.
  • Fig. 1 a partial section of a discharge vessel 1 is shown, in which a holding rod 2 is melted.
  • the support rod 2 On its rear side the support rod 2 is provided with a gas-tight ⁇ in the neck of the discharge vessel 1tientschmolze- NEN current carrying molybdenum foil connected Ia.
  • the quartz glass of the discharge vessel 1 becomes anchored when the holding rod 2 melts.
  • cracks Ib are created in the surrounding surrounding holding rod due to the different expansion of the materials Area of the discharge vessel 1.
  • an arc tube for a discharge lamp which corresponds to a discharge vessel and which has a discharge space in which tungsten electrodes are arranged protruding. At the edge of this discharge space, the tungsten electrodes are connected to the discharge vessel.
  • This connection between the discharge vessel and a tungsten electrode is in this case designed in such a manufacturing technology, that the tungsten electrode is inserted into the provided discharge vessel and the Entla ⁇ is heated manure vessel in the region of the connection. The heating takes place in such a way that the discharge vessel can be deformed.
  • connection between the tungsten electrode and the discharge vessel is then carried out by squeezing, for which purpose a squeezing device is attached to the discharge vessel from the outside, thereby squeezing the discharge vessel at the corresponding location.
  • the connection between the tungsten electrode and the discharge vessel is thereby but also in such a way that jumps in the discharge vessel can nevertheless occur relatively frequently during the subsequent cooling of these components.
  • the present invention therefore has for its object to provide a method in which the connection between the discharge vessel and an electrode, in particular a support rod of the electrode, a Entla pressure discharge lamp may be formed such that the on ⁇ occur at least reduce such cracks can.
  • a further object of the present invention is to provide a method for producing a discharge lamp and a discharge lamp with which the occurrence of such cracks in the discharge vessel can at least be reduced.
  • the discharge vessel is provided in its then further processed basic shape and a first holding bar of the discharge lamp at least be ⁇ rich in the Discharge vessel introduced.
  • the electrode is preferably already formed at a front end which projects into a discharge space of the discharge vessel.
  • This first holding rod is disposed preferably be ⁇ already exact position.
  • this discharge vessel is at home ⁇ Neren generates a gas pressure WEL -A-
  • the discharge vessel is heated at least at a contact region to be formed between the discharge vessel and the first holding rod and the discharge vessel is deformed due to the negative pressure in the interior and on the basis of the heating of the discharge vessel.
  • a negative pressure between about 5 mbar and about 500 mbar is advantageously set. It is particularly advantageous if in the perception ⁇ ren of the discharge vessel a gas pressure is set, which is between 50 mbar and adjusted mbar 150th In conjunction with the heating of the discharge vessel, which is at least temporarily or else completely subsequent, a particularly favorable design of the contact region can be achieved with such a setting of a gas pressure.
  • the seizures of Entladungsgefä ⁇ SSES to the electrode takes place in terms of area and design terms such that a cracking on from ⁇ cool these components can be substantially completely avoided.
  • the surface of the support rod is formed as smooth as possible.
  • the surface of at least .mu.m in the area of the contact region to be formed with a roughness of less than 3, in particular ⁇ sondere smaller 1 micron is formed.
  • the surface structure of the support rod is preferably designed such that flat-out ⁇ formed depressions and elevations are formed in seizures of the discharge vessel to the support rod at least in the region of the trainee contact area as few as possible, and preferably only much, so the material of the discharge vessel that only can form very weakly to this surface structure and thus at best a very weak toothing isaded ⁇ det.
  • a surface structure of the support rod in which formed unevenness with level differences smaller than 1 micron, proves to be particularly suitable. This allows structures to which surfaces in Wesentli ⁇ are sufficiently smooth design, to take account of the different union under ⁇ expansion behavior of the materials could be created without jumps in the discharge vessel.
  • the discharge vessel is preferably made of glass or a glass-like material.
  • quartz glass can also be provided here.
  • the holding rod or core pin is at least partially connected to an electrically conductive lead, in particular connected to a molybdenum foil.
  • the core pin may for example be formed of tungsten, wherein the film may be at least partially made of molybdenum.
  • the heating of the discharge vessel can be carried out by means of a conventional flame fire or else by laser radiation or generated plasma radiation or infrared radiation. Depending on the situation can thereby resorting to a radiation source advertising to which the specific design and Ferti ⁇ supply promises the best results.
  • the viscosity of the at Garstab accumulating material of the discharge vessel are kept significantly lower than in a squeeze, as is performed in the prior art according to US 6,891,332 Bl. According to the proposed method, this viscosity is so low that a significantly improved connection between the discharge vessel and the core pin or the current feedthrough can be achieved. Due to this relatively low viscosity, on the one hand a good application of the material to the support rod can be achieved and on the other hand a strong toothing of this viscous material with the surface of the holding ⁇ rod can be prevented because this surface is relatively smooth and formed with a low roughness. This also favorably can be achieved that during the subsequent cooling no such teeth negatively affect the voltage behavior and thus in this regard, the crack and crack formation in the discharge vessel can be at least reduced.
  • a gas pressure is preferably generated which substantially corresponds to a Gregasatmospreheat vessel of a filler gas in the discharge ⁇ for introducing.
  • a gas pressure is preferably generated which substantially corresponds to a Gregasatmospreheat vessel of a filler gas in the discharge ⁇ for introducing.
  • the conditions for forming the contact area as well as for the one ⁇ fill of the filler gas can thus be designed substantially the same and thus two different process ⁇ steps are performed substantially simultaneously. As a result, the production can be carried out faster and also with lower costs.
  • the low gas pressure generated inside the discharge ⁇ vessel is maintained at least as long, is formed to the contact portion.
  • a second holding bar of a second electrode is connected to the discharge vessel, whereby a corresponding introduction of this second electrode into the discharge vessel, the formation of the low gas pressure in the interior of the discharge vessel, the heating of the discharge vessel and the deformation of the discharge vessel due these process conditions are performed to form the contact area.
  • the sequence of these method ⁇ steps for arranging the second holding rod is carried out time after the execution and thus introduction of the first elec- rode, and thus in particular after connecting the ers ⁇ ten holding rod with the discharge vessel.
  • the second holding bar with the second electrode is subsequently connected at a corresponding time.
  • the two support rods are inserted into the corresponding openings provided for the discharge vessel and then substantially simultaneously both support rods are connected by the corresponding process steps with the discharge vessel and at the respective locations each contact areas are formed.
  • Another aspect of the invention relates to a method for producing a discharge lamp, in particular a high-pressure discharge lamp in which a compound egg nes discharge vessel and at least one support rod one above filed ⁇ th method according to the invention or an advantageous embodiment is formed of which an electrode of the discharge lamp according.
  • a discharge lamp can be produced in which the formation of cracks in the contact region between the discharge vessel and at least one holding bar can be substantially reduced.
  • the probability of rupture of a discharge lamp significantly reduces the ⁇ .
  • a filling gas of the discharge ⁇ lamp substantially simultaneously with the generating of the negative pressure is introduced into the discharge vessel and the filling gas is at least cooled during the forming of the Kunststoffbe ⁇ Reich between the discharge vessel and a holding rod.
  • at least one filling opening is formed on the discharge vessel, through wel ⁇ che the filling gas is introduced temporally following the formation of the connection between the discharge vessel and the HaI- test rods. This is particularly advantageous if both support rods substantially equal time ⁇ be connected to the discharge vessel and the corresponding contact portions are formed substantially simultaneously. In this embodiment, therefore, only once a low gas pressure and thus a negative pressure in the discharge vessel is formed and subsequently or temporally overlapping to a heating of the corresponding regions of the discharge vessel is performed.
  • Another aspect of the invention relates to a discharge lamp with a discharge vessel and holding rods for electrodes, which are introduced into the discharge vessel at least be ⁇ rich, in each case between ei ⁇ nem holding rod and the discharge vessel, a contact area is formed.
  • Each of these contact areas is formed by a voltage applied to the support rod deformation of the discharge ⁇ charge vessel due to heating of at least the Kunststoff Schemes joint inside with a compared to the environment of the discharge vessel with a nied ⁇ rigeren gas pressure applied discharge vessel.
  • Fig. 1 shows a known prior art Operaan- provides a discharge vessel of a discharge Slam ⁇ pe
  • Fig. 2 is an enlarged view of a partial section in Fig. 1;
  • Fig. 3 is a schematic sectional view of a Sectionbe- realm of a discharge vessel of a discharge lamp according to the invention in a first manufacturing stage ⁇ ;
  • Fig. 4 is a schematic representation of the Entladungsgefä ⁇ SLI according to Fig 3 in a secondtechniksstadi-.
  • Fig. 5 is a view similar to Fig. 2 enlarged view of a portion of a support rod according to its use in a discharge lamp according to the invention.
  • a tubular discharge vessel is 1 shows ge ⁇ which high-pressure discharge lamp is associated with a not shown.
  • the tubular discharge vessel ⁇ 1 in the exemplary embodiment includes an elliptically-shaped light-emitting body 11, which in cross section by arcuate portions of the tubular unloading training vessel 1 is formed. Subsequently, tubular portions 12 and 13 are formed as necks on both sides of this light emitting body 11.
  • the tubular discharge vessel 1 is made of quartz glass.
  • this discharge vessel 1 For further production of this discharge vessel 1 is provided ge ⁇ Gurss the embodiment shown, and hereinafter, through an opening 15, a first support rod 2 having a first electrode at least partially inserted into the tubular discharge vessel. 1
  • the first support rod 2 or the core pin is formed of tungsten and at least partially melted by a molybdenum foil to ⁇ .
  • this first holding bar 2 is inserted so as to protrude with a front end into a discharge space 14 a of the light emitting body 11.
  • a mechanical ⁇ rule connection between the discharge vessel 1 and the first electrode, in particular the first support rod 2 is hereinafter referred to the example shown in Fig.
  • the interior of the discharge vessel 1 is formed as ⁇ in through the discharge space 14a and cavities 14b and 14c of the necks or the portions 12 and 13.
  • ⁇ is dung container 1 generates a negative pressure in the interior.
  • Preference is given to ⁇ set at a gas pressure which is between 50 mbar and 150 mbar. The exact value specification of this negative pressure depends on the configuration and the situa- tion-dependent conditions with regard to the discharge lamp to be produced.
  • the discharge vessel 1 is then heated from the outside by means of at least one laser 3.
  • the heating by the laser 3 is effected ört ⁇ Lich focused at the point at which the connection between the discharge vessel 1 and the support rod 2 to be formed.
  • the partial region 13 is heated in such a way that the quartz glass deforms in the direction of the retaining rod 2 due to the negative pressure generated in the interior of the discharge vessel 1.
  • the set Pro ⁇ zess committee and the processing performed in particular the set vacuum and heat up the men of the discharge vessel 1, lies down, the quartz glass and the quartz glass is obtained in the optimum manner to the support rod. 2
  • This mechanical connection is so intimate, the more free surface is this connection to the Availability checked ⁇ supply.
  • FIG. 5 shows an enlarged partial section of a retaining bar 2 melted down according to the method according to the invention. The much lower surface roughness of the support rod 2, in conjunction with the Inventive ⁇ method according to a mechanical connection without cracks.
  • the contact region 17 is generated.
  • FIGS. 3 and 4 is exemplary only the off ⁇ form a connection between the discharge vessel 1, in particular the portion 13, and explained in the first support rod 2.
  • the off ⁇ takes place in the exemplary embodiment hereinafter to play this embodiment form a connection between the discharge vessel 1 and a second supporting rod having a second electrode (not shown).
  • This second holding bar is designed analogously to the first holding bar 2 and is connected via an opening 16 in the partial area 12 of the discharge vessel 1. guided.
  • a negative pressure in the interior of the discharge vessel 1, for forming a log to the contact area 17 ana ⁇ embodied contact region in turn generates and heats the discharge vessel 1 in the partial area 12 at the appropriate location.
  • a contact region 17 can be created, which is significantly improved with regard to the avoidance of cracks and cracks in the discharge vessel 1.
  • a ⁇ type negative pressure for subsequent formation of the contact area is generated in the interior of the discharge vessel, which essentially the filling ⁇ gas atmosphere for introducing a filling gas into the discharge vessel 1 and in particular in the Discharge space 14a corresponds.
  • the filling gas for the discharge lamp can be introduced.
  • the low gas pressure generated in the In ⁇ nenraum the discharge vessel 1 is maintained at least as long, is completely formed by the contact area 17th
  • the consecu- temporally hand takes place the following forming the contact regions 17 between the discharge vessel 1 and the first support rod 2 a ⁇ and between the discharge vessel 1 and the second support rod, not shown, virtually simultaneously. It is initially provided that in the provided discharge vessel 1 of the first Garstab 2 is introduced according to the illustration shown and the second holding bar on the opening 16 is ⁇ leads. In the following, the negative pressure in the interior of the discharge vessel 1 is then generated and, for example, a heating is carried out by two separate heat sources essentially simultaneously at the corresponding locations, ie the partial areas 12 and 13. The contact areas 17 are then generated substantially simultaneously.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L'invention concerne un procédé de réalisation d'une liaison entre une ampoule de décharge (1) et une tige de maintien (2) d'une électrode d'une lampe à décharge, réalisé selon les étapes consistant : a) à préparer l'ampoule de décharge (2) de la lampe à décharge ; b) à introduire une première tige de maintien (2) de la lampe à décharge dans l'ampoule de décharge (1) ; c) à produire une pression de gaz inférieure comparativement à l'environnement extérieur de l'ampoule de décharge (1) à l'intérieur (14a, 14b, 14c) de l'ampoule de décharge (1) ; d) à chauffer l'ampoule de décharge (1) au moins dans une zone de contact (17) à constituer entre l'ampoule de décharge (1) et la première tige de maintien (2) ; e) à déformer localement l'ampoule de décharge (1) en raison des conditions de processus obtenues par les étapes c) et d) de telle sorte que le matériau de l'ampoule de décharge (1) se place contre le matériau de la première tige de maintien (2) et que la zone de contact (17) soit réalisée.
PCT/EP2007/055284 2006-06-01 2007-05-31 Lampe à décharge et procédé de réalisation d'une liaison entre une ampoule de décharge et une tige de maintien pour une électrode d'une lampe à décharge WO2007138090A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006025571.2 2006-06-01
DE200610025571 DE102006025571A1 (de) 2006-06-01 2006-06-01 Entladungslampe und Verfahren zum Ausbilden einer Verbindung zwischen einem Entladungsgefäß und einem Haltestab für eine Elektrode einer Entladungslampe

Publications (1)

Publication Number Publication Date
WO2007138090A1 true WO2007138090A1 (fr) 2007-12-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/055284 WO2007138090A1 (fr) 2006-06-01 2007-05-31 Lampe à décharge et procédé de réalisation d'une liaison entre une ampoule de décharge et une tige de maintien pour une électrode d'une lampe à décharge

Country Status (3)

Country Link
DE (1) DE102006025571A1 (fr)
TW (1) TW200818244A (fr)
WO (1) WO2007138090A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866488A1 (fr) * 1997-03-17 1998-09-23 Matsushita Electric Industrial Co., Ltd. Lampe à décharge haute pression et procédé pour sa fabrication
EP1137048A2 (fr) * 2000-03-13 2001-09-26 Nec Corporation Lampe à décharge à haute pression et méthode pour sceller une ampoule pour celle-ci
US20020135305A1 (en) * 1998-03-16 2002-09-26 Makoto Horiuchi Discharge lamp and method of producing the same
EP1298705A2 (fr) * 2001-09-04 2003-04-02 Matsushita Electric Industrial Co., Ltd. Lampe à décharge à haute pression et procédé pour sa fabrication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866488A1 (fr) * 1997-03-17 1998-09-23 Matsushita Electric Industrial Co., Ltd. Lampe à décharge haute pression et procédé pour sa fabrication
US20020135305A1 (en) * 1998-03-16 2002-09-26 Makoto Horiuchi Discharge lamp and method of producing the same
EP1137048A2 (fr) * 2000-03-13 2001-09-26 Nec Corporation Lampe à décharge à haute pression et méthode pour sceller une ampoule pour celle-ci
EP1298705A2 (fr) * 2001-09-04 2003-04-02 Matsushita Electric Industrial Co., Ltd. Lampe à décharge à haute pression et procédé pour sa fabrication

Also Published As

Publication number Publication date
TW200818244A (en) 2008-04-16
DE102006025571A1 (de) 2007-12-06

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