EP2052405B1 - Corps de démarrage pour une lampe à décharge basse pression - Google Patents

Corps de démarrage pour une lampe à décharge basse pression Download PDF

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Publication number
EP2052405B1
EP2052405B1 EP07821614A EP07821614A EP2052405B1 EP 2052405 B1 EP2052405 B1 EP 2052405B1 EP 07821614 A EP07821614 A EP 07821614A EP 07821614 A EP07821614 A EP 07821614A EP 2052405 B1 EP2052405 B1 EP 2052405B1
Authority
EP
European Patent Office
Prior art keywords
mercury
low
absorbing layer
pressure discharge
startup element
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 - Fee Related
Application number
EP07821614A
Other languages
German (de)
English (en)
Other versions
EP2052405A1 (fr
Inventor
Kirsten Fuchs
Klaus Pankratz
Gerald Hämmer
Paul Lange
Viktor Malik
Thomas Noll
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
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP2052405A1 publication Critical patent/EP2052405A1/fr
Application granted granted Critical
Publication of EP2052405B1 publication Critical patent/EP2052405B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/28—Means for producing, introducing, or replenishing gas or vapour during operation of the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury

Definitions

  • the present invention understood a starter body for a low-pressure discharge lamp, d. H. in particular a low-pressure mercury discharge lamp and an amalgam low-pressure discharge lamp, a low-pressure discharge lamp with such a starting body and a method for producing such a starting body.
  • Low-pressure mercury discharge lamps which have pure mercury in contrast to amalgam low-pressure discharge lamps for generating the luminous flux in the discharge vessel, have the advantage that the mercury vapor pressure at room temperature and thus the initial luminous flux are relatively high.
  • Fig. 1 the luminous flux over the starting time for mercury low-pressure discharge lamps is reproduced.
  • Fix. 1 it can be seen that the instantaneous light shortly after switching on the low-pressure discharge lamp is only at a size of 30% compared to the stabilized value present after 180 seconds.
  • Amalgam low-pressure discharge lamps have a low mercury vapor pressure at room temperature, whereby the initial luminous flux is relatively low, and the start-up time is also relatively long due to only a slow increase in the vapor pressure after switching on.
  • both a working amalgam and a starting amalgam are provided.
  • the starting amalgam is located near the helix, for example on the glass bead holding the power supply wires together.
  • Such a Aniaufärnalgam the start-up time can be reduced.
  • the prerequisite is that sufficient time is available before switching on, so that a sufficient amount of mercury is absorbed by the starting amalgam.
  • the documents EP1069595 and EP176627 disclose low-pressure mercury discharge lamps with a starter body as an additional flag in the vicinity of each of the electrodes.
  • the start-up body has a mercury-absorbing indium layer through which mercury can be absorbed before the start of the lamp.
  • the object of the present invention is to provide a starting body for a low-pressure discharge lamp, by which an increased luminous flux after switching on the low-pressure discharge lamp is enabled and the life of the lamp is increased. Furthermore, a low-pressure discharge lamp is to be created with such a starter body and a method for producing such a starter body.
  • a starter body for a mercury toggle pressure discharge lamp which has a mercury-containing layer through which mercury can be accommodated in the time-out of the lamp between two starts. As a result, the startup behavior of the low-pressure discharge lamp can be improved.
  • the start-up body has a coating layer covering the mercury-absorbing layer at least in sections, which does not form amalgam with mercury and which preferably comprises titanium. This makes it possible to reduce the oxidation of the mercury-absorbing layer, which can occur, for example, during the production process, and at the same time achieve a getter effect.
  • a starter body for an amalgam low-pressure discharge lamp which has a mercury-absorbing layer, by means of which mercury can be accommodated before the start of the lamp, and a coating which at least partially covers the mercury-absorbing layer.
  • the coating mix mercury does not form an amalgam and preferably has titanium.
  • the mercury-absorbing layer has indium, by means of which a rapid uptake and release of mercury can be realized.
  • the titanium-containing coating is preferably made of titanium powder, concretes and water, so that an excellent Getterrial is feasible.
  • titanium is applied in an amount of about 1 to 2 mg, preferably 1.5 mg, so that, with good blockage of the oxidation of the mercury-absorbing layer, excellent uptake and release of mercury by the mercury-accepting Layer is feasible and at the same time the getter effect of the coating layer can be realized.
  • the starting body preferably has a base body which is made of stainless steel, since it does not undergo amalgam compound with mercury.
  • a low-pressure discharge lamp is provided with a discharge vessel, two electrodes and a starter body described above, which is arranged in the vicinity of at least one of the electrodes. In this way, it is ensured that when the titanium coating layer is applied, the required temperature range for the getter effect of the titanium can be achieved.
  • a starter body is assigned to each of the electrodes, so that the starting behavior of the low-pressure discharge lamp is promoted at each electrode.
  • the distance between the startup body and a helix of an electrode is selected in such a manner that the temperature at the startup body is in the range between 250 ° C and 400 ° C, more preferably in the range between 300 and 350 ° C to achieve an excellent gettering effect.
  • the distance between the starting body and a helix of an electrode is preferably 1 to 2 mm, so that the temperature at the starter body for the getter effect can be achieved.
  • the mercury-absorbing layer is more preferably provided in such an amount at the starter body that the amount of mercury released by the starter body substantially compensates for the loss of mercury due to adsorption in the starting phase of the lamp. As a result, supersaturation of the gas phase with mercury is avoided and an excellent start-up behavior is achieved.
  • the mercury-absorbing layer is provided on the starter body in an amount such that it absorbs mercury in the range of about 5 to 10% of the amount of mercury in the discharge vessel.
  • a method for producing a starter body for a low-pressure discharge lamp comprising the steps of providing a base body, applying a mercury-absorbing layer to the base body and providing a paste comprising titanium, and applying it at least in sections to the mercury-absorbing layer.
  • the coating layer is applied by dip coating, which simplifies the manufacturing process.
  • the base body can be dried so that the starting body is seductive in a short time.
  • steps of depositing titanium and drying be repeated at least once to achieve the desired layer thickness.
  • Fig. 3 shows a starter body for a low-pressure mercury discharge lamp according to the first embodiment.
  • This starting body 1 has a base body 2 made of flat material in strip form, which is preferably made of stainless steel.
  • This round body 2 is divided approximately in the middle by a constriction 4 in two halves. The one of the halves, in Fig. 3 the right half, serves to fix the start-up flag adjacent to one electrode of the low-pressure discharge lamp and the other half, in Fig. 3 the left half serves to apply a mercury-absorbing layer 6.
  • this mercury-absorbing layer 6 has indium.
  • the applied layer 6 is mercury from the discharge vessel of the low-pressure discharge lamp, in which the starter body 1 is introduced, are recorded in the off state of the low-pressure discharge lamp and delivered at power.
  • the amount of indium be provided in such a manner that the amount of mercury taken up and discharged from the indium layer is at least as large as the amount of Hg in the lamp starting phase Due to the physical adsorption by the phosphorus layer of mercury is taken, but preferably is so large that at complete evaporation in the lamp, a vapor pressure of a few pascals is generated.
  • the amount of indium is reduced by a variety of factors.
  • the indium creeps along a gradient from low temperature to higher temperature, with the strobe usually being heavily oxidized.
  • sputtering of indium occurs by the discharge, in particular due to additional contamination of the lamp and with a galvanic connection between the starter body and the Stroz.
  • a bypass solution is the introduction of the starting body in the glass bead, resulting in more manufacturing problems.
  • An overdose The amount of indium beyond the amount of 0.5 to about 1 mg per flag used in the present invention leads to increased costs in the production of the indium layer.
  • the above-mentioned disadvantages of the mercury-emitting layer on the starter body 1 from Fig. 3 can be characterized by a starter body 10 Fig. 4 , which can be used in low-pressure mercury discharge lamps and low-pressure discharge amalgam discharge lamps, are eliminated.
  • the basic body 2 with constriction 4 and the mercury-absorbing layer 6 of the starting body 10 out Fig. 4 match those out Fig. 3 ,
  • a coating layer 8 comprising titanium is applied.
  • oxidation during the production process can be greatly reduced without the start-up behavior of the low-pressure discharge lamp deteriorating. Further, the coating layer is a great hindrance to the creep of the indium along the temperature gradient. Also, sputtering of indium is greatly reduced because the coating layer is the outer layer and thus sputtered as the first titanium.
  • amalgam low-pressure discharge lamps can also make a significant reduction in the amount of indium, which can reduce costs and overshoot the luminous flux is reduced.
  • the coating layer greatly reduces oxidation of indium, the distance between helix and starter body can be reduced, for example, to 1 to 2 mm. As a result, the starter body can be heated faster and results in a faster start-up behavior compared to starter bodies, which are mounted at a greater distance from the helix.
  • the coating layer in particular with regard to its thickness and the grain size, mercury diffusion both in the direction of the mercury transfer of the layer 6 and the mercury uptake of the layer 6 as well as the function of the coating layer as a getter, as an oxidation resistance and creep barrier must be considered.
  • the improved casserole behavior due to the starter bodies 1 and 10 according to the invention also has an effect on the use of the electronic ballasts for the low-pressure discharge lamp.
  • the increased luminous flux after switching on the low-pressure discharge lamp can be considered.
  • a mercury low-pressure discharge lamp which has a discharge vessel 12, the three vessel segments 12a, 12b, 12c, the discharge spaces are interconnected. Each of these segments 12a, 12b, 12c is substantially U-shaped. To simplify the drawing, the segments, normally arranged in 120 ° symmetry, are shown side by side. Low-pressure discharge lamps with such discharge vessels are sold by OSRAM, for example, under the name "DULUX EL".
  • the inner surfaces of the discharge vessel 12 are coated with a powder of fluorescent material and the discharge vessel is filled with a noble gas, preferably argon or neon, as well as with mercury vapors.
  • each of the electrodes has power supply wires 18a, 18b, 20a, 20b, which are led out of the discharge vessel and which are fixed by a glass bead 22, 24 and to the respective coils 26, 28 lead. Between the glass beads 22, 24 and respective helix 26, 28, a start-up body 10 according to the invention adjacent to helix 26, 28 is provided. At the central segment 12B of the discharge vessel 12, a cold spot 30 is shown, at which liquid mercury accumulates in the usual suspended operation of the lamp.
  • the temperature at this cold spot determines the mercury vapor pressure in the lamp.
  • the starter bodies 10 cool down, causing them to absorb mercury from the gaseous phase, which is supplied by the cooling point 30 until it has reached equilibrium.
  • the starter body 10 Due to the proximity to the helices 26, 28, the starter body 10 causes rapid release of mercury, while liquid mercury is present at the cold spot 30 due to the low temperature present and slow mercury release occurs when the low-pressure discharge lamp is switched on.
  • amalgam low-pressure discharge lamps due to the different vapor pressure of work amalgam and starting amalgam in the on and off phases of the lamp, a redistribution of the mercury of starting amalgam in the Häamalgam and in the opposite direction.
  • switch-on phase a cold spot is formed in the meantime, by which the lamp is made into a mercury lamp.
  • any working amalgam can be used in the amalgam low-pressure discharge lamps according to the invention, for example a working amalgam introduced into the pump stanchion, in front of which, for example, an iron disk or iron ball is arranged, which prevents the working amalgam from penetrating into the discharge vessel.
  • the work amalgam can be introduced, for example, applied to expanded metal in the discharge vessel. The distance between the helix and the starting amalgam is lower than the distance between the helix and the working amalgam.
  • the starting body is heated to a temperature in the range of 250 ° C to 400 ° C, more preferably between 300 ° C and 350 ° C is.
  • the present invention is not limited to the use of indium as the material for the mercury-absorbing layer 6 and the use of titanium as the material for the coating layer, but any source of mercury may be used for the mercury-absorbing layer and any material for the coating layer by which the loss process of the material of the mercury-absorbing layer is avoided and in which a getter effect is present in the operating range used for low-pressure discharge lamps.
  • a starter body on which a mercury-absorbing layer is applied, and which is applicable to low-pressure mercury discharge lamps.
  • a starter body for an amalgam low-pressure discharge lamp has on a base body a mercury-absorbing layer on which a coating layer is located, through which a loss process of the material of the mercury-absorbing layer can be prevented and has the gettering effect.

Landscapes

  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L'invention concerne un corps de démarrage sur lequel une couche réceptrice de mercure est appliquée, pouvant être employé sur des lampes à décharge basse pression au mercure. Un corps de démarrage pour une lampe à décharge basse pression à amalgame présente une couche réceptrice de mercure sur un corps de base, sur laquelle se trouve une couche de revêtement. Cette couche de revêtement permet d'empêcher un processus de perte du matériau de la couche réceptrice de mercure, et présente un effet de Getter.

Claims (16)

  1. Corps ( 1 ) d'amorçage d'une lampe à décharge à basse pression au mercure, qui comporte une couche (6) absorbant le mercure, par laquelle du mercure peut être absorbé avant l'amorçage de la lampe et, comprenant un revêtement ( 8 ), qui ne forme pas d'amalgame avec le mercure, qui a, de préférence, du titane et qui recouvre, au moins par endroit, la couche ( 6 ) absorbant le mercure.
  2. Corps ( 10 ) d'amorçage pour une lampe à décharge à basse pression à amalgame, qui comporte une couche ( 6 ) absorbant le mercure, par laquelle du mercure peut être absorbé avant l'amorçage de la lampe et un revêtement ( 8 ) qui ne forme pas d'amalgame, qui a, de préférence, du titane et qui revêt, au moins par endroit, la couche absorbant le mercure.
  3. Corps d'amorçage suivant l'une des revendications précédentes, dans lequel la couche (6) absorbant le mercure comporte de l'indium.
  4. Corps d'amorçage suivant l'une des revendications précédentes, dans lequel la revêtement ( 8 ) comportant du titane est constitué, au moins en partie, de poudre de titane.
  5. Corps d'amorçage suivant l'une des revendications précédentes, dans lequel, par le revêtement ( 8 ), du titane est déposé en flocons en une quantité d'environ 1,0 à 2,0 mg/cm2, de préférence d'environ 1,5 mg/cm2.
  6. Corps d'amorçage suivant l'une des revendications précédentes, dans lequel le corps d'amorçage comporte un corps (2) de base en acier inoxydable sur lequel la couche ( 6 ) absorbant du mercure et le revêtement ( 8 ) comportant du titane sont déposés.
  7. Lampe à décharge à basse pression, comprenant une enceinte de décharge, deux électrodes ( 14, 16 ) et un corps ( 1, 10 ) d'amorçage suivant la revendication 1 ou 2, dans laquelle le corps (1, 10) d'amorçage est disposé à proximité d'au moins l'une des électrodes, de préférence comme drapeau d'addition entre les barrettes de montage de la lampe.
  8. Lampe à décharge à basse pression suivant la revendication 7, dans laquelle un corps (1, 10 ) d'amorçage suivant la revendication 1 est associé à chacune des électrodes ( 14, 16).
  9. Lampe à décharge à basse pression suivant la revendication 7 ou 8, dans laquelle la distance entre des corps ( 1, 10 ) d'amorçage et un filament ( 26, 28 ) d'une électrode ( 14, 16 ) a été choisie d'une façon telle que la température du corps ( 1, 10 ) d'amorçage soit comprise entre 250°C et 400°C et, de manière très préférée, entre 300 et 350°C.
  10. Lampe à décharge à basse pression suivant l'une des revendications 7 à 9, dans laquelle la distance entre le corps ( 1, 10 ) d'amorçage et un filament ( 26, 28 ) d'une électrode va de 1 à 2 mm.
  11. Lampe à décharge à basse pression suivant l'une des revendications 7 à 10, dans laquelle la couche (6) absorbant le mercure est prévue en une quantité telle sur le corps ( 1, 10 ) d'amorçage que la quantité de mercure dégagé par le corps d'amorçage compense, au moins pendant la phase d'amorçage de la lampe, la perte de mercure provoquée par l'adsorption.
  12. Lampe à décharge à basse pression suivant l'une des revendications 7 à 11, dans laquelle la couche (6) absorbant le mercure est prévue sur le corps d'amorçage en une quantité telle que celle-ci, pendant une durée typique de non fonctionnement de la lampe de quelques heures lors d'une évaporation complète, produit une tension de vapeur de quelques pascals dans la lampe.
  13. Procédé de fabrication d'un corps d'amorçage pour une lampe à décharge à basse pression, comprenant les stades a) on prévoit un corps ( 2 ) de base, b) on dépose sur le corps de base une couche (6) absorbant le mercure et c) on prévoit une suspension, qui comporte du titane, et on la dépose, au moins en partie, sur la couche ( 6 ) absorbant le mercure.
  14. Procédé suivant la revendication 13, dans lequel, dans le stade c), on effectue le dépôt par immersion.
  15. Procédé suivant la revendication 13 ou 14, comprenant un stade d), qui fait suite au stade c), dans lequel on sèche le corps ( 2 ) de base revêtu de la couche absorbant le mercure et de titane.
  16. Procédé suivant la revendication 15, comprenant un stade e), qui fait suite au stade d), dans lequel on répète, au moins une fois, les stades c) et d).
EP07821614A 2006-11-03 2007-10-22 Corps de démarrage pour une lampe à décharge basse pression Expired - Fee Related EP2052405B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006052026A DE102006052026A1 (de) 2006-11-03 2006-11-03 Anlaufkörper für eine Niederdruckentladungslampe
PCT/EP2007/061250 WO2008052897A1 (fr) 2006-11-03 2007-10-22 Corps de démarrage pour une lampe à décharge basse pression

Publications (2)

Publication Number Publication Date
EP2052405A1 EP2052405A1 (fr) 2009-04-29
EP2052405B1 true EP2052405B1 (fr) 2011-03-02

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Application Number Title Priority Date Filing Date
EP07821614A Expired - Fee Related EP2052405B1 (fr) 2006-11-03 2007-10-22 Corps de démarrage pour une lampe à décharge basse pression

Country Status (5)

Country Link
US (1) US8154202B2 (fr)
EP (1) EP2052405B1 (fr)
CN (1) CN101529552B (fr)
DE (2) DE102006052026A1 (fr)
WO (1) WO2008052897A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20112111A1 (it) 2011-11-21 2013-05-22 Getters Spa Lampada contenente un'amalgama di partenza migliorata

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1060991B (de) 1957-02-15 1959-07-09 Patra Patent Treuhand Einrichtung zur Verhinderung stoerender Schwaerzungen an Leuchtstofflampen
JPH01197959A (ja) * 1988-02-02 1989-08-09 Toshiba Corp 低圧水銀蒸気放電灯用アマルガムおよびこのアマルガムを用いた低圧水銀蒸気放電灯
CN1083148C (zh) * 1994-12-20 2002-04-17 皇家菲利浦电子有限公司 低压汞汽放电灯
DE19528390A1 (de) * 1995-08-02 1997-02-06 Sli Lichtsysteme Gmbh Metallband, insbesondere Stahlband, zur Herstellung von Schilden für den Einbau in insbesondere Niederdruck-Entladungslampen
IT1277239B1 (it) 1995-11-23 1997-11-05 Getters Spa Dispositivo per l'emissione di mercurio,l'assorbimento di gas reattivi e la schermatura dell'elettrodo all'interno di lampade
US6009375A (en) * 1997-10-10 1999-12-28 Seiko Instruments Inc. Portable GPS receiver
JP3417349B2 (ja) * 1999-07-14 2003-06-16 松下電器産業株式会社 蛍光ランプおよびそれを用いた電球形蛍光ランプ
US20020057059A1 (en) * 2000-07-28 2002-05-16 Kazuhisa Ogishi Fluorescent lamp, self-ballasted fluorescent lamp and lighting apparatus
CN2560092Y (zh) 2002-07-19 2003-07-09 朱升和 新型辅助汞齐
ITMI20050044A1 (it) * 2005-01-17 2006-07-18 Getters Spa Composizioni per il rilascio di mercurio
DE102006052760A1 (de) 2006-11-08 2008-05-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zum Fertigen und Einbringen eines Elektrodengestells mit einer Lampenwendel in ein Entladungsgefäß einer Entladungslampe

Also Published As

Publication number Publication date
CN101529552B (zh) 2012-07-18
CN101529552A (zh) 2009-09-09
DE102006052026A1 (de) 2008-05-08
US20090322223A1 (en) 2009-12-31
US8154202B2 (en) 2012-04-10
DE502007006619D1 (de) 2011-04-14
EP2052405A1 (fr) 2009-04-29
WO2008052897A1 (fr) 2008-05-08

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