EP0118100B1 - Lampe à décharge à basse pression avec culot à un côté - Google Patents

Lampe à décharge à basse pression avec culot à un côté Download PDF

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Publication number
EP0118100B1
EP0118100B1 EP84102130A EP84102130A EP0118100B1 EP 0118100 B1 EP0118100 B1 EP 0118100B1 EP 84102130 A EP84102130 A EP 84102130A EP 84102130 A EP84102130 A EP 84102130A EP 0118100 B1 EP0118100 B1 EP 0118100B1
Authority
EP
European Patent Office
Prior art keywords
lamp
low
pressure discharge
discharge lamp
glass
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
Application number
EP84102130A
Other languages
German (de)
English (en)
Other versions
EP0118100A1 (fr
Inventor
Gerhard Dr. Steeger
Josef Plischke
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 EP0118100A1 publication Critical patent/EP0118100A1/fr
Application granted granted Critical
Publication of EP0118100B1 publication Critical patent/EP0118100B1/fr
Expired 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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/10—Shields, screens, or guides for influencing the discharge
    • H01J61/103—Shields, screens or guides arranged to extend the discharge path
    • 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 invention relates to a low-pressure discharge lamp with a base on one side, comprising an outer bulb which is sealed gas-tight with a melt and contains a gas and / or metal vapor filling, two preheatable electrodes which are provided with current leads and are arranged inside the outer bulb on the melt, and one or two U which are likewise arranged inside the outer bulb -shaped inner tubes made of glass, the first end of one of the straight legs of each inner tube gas-tightly enclosing the power supply lines of one of the preheatable electrodes and the second end of the other straight leg of each inner tube having an opening which is arranged in the vicinity of the melting point.
  • Lamps with such a construction are referred to as compact lamps because of their greatly shortened design compared to conventional low-pressure discharge lamps.
  • these lamps can be operated in standard incandescent lamp holders.
  • Such compact lamps are therefore suitable with a corresponding design for the direct replacement of incandescent lamps. Due to their higher efficiency for converting the absorbed electrical energy into visible light and due to their longer lifespan, compact lamps are more economical than incandescent lamps. Despite this clear advantage, compact lamps have so far not been able to prevail.
  • a single-ended low-pressure discharge lamp in which in an outer bulb at least one with the first end a preheatable electrode is gas-tight enclosing and with the other end an opening to the lamp bulb having U-shaped inner tube.
  • the gas-tight fusion between the U-shaped inner tube and the preheatable electrode on the one hand and the outer bulb surrounding the gas filling on the other hand takes place by means of a fusion-bonding glass and a chrome iron plate serving as a foot part.
  • the soldering of all parts with this fusion glass requires a complex and therefore relatively expensive manufacturing technique. In addition, this process is less suitable for the production of large quantities on fully automatic machines due to the frequent soldering errors.
  • EP-A-0 076 503 proposed a low-pressure discharge lamp with a base on one side, in which a preformed plate was used to produce the melt.
  • This document falls under Article 54 (3) EPC and it should be noted that this document is not relevant to the question of inventive step.
  • the preformed plate has a receiving part for the one or more U-shaped inner tubes and an outwardly directed edge for fusing with the outer bulb.
  • the preformed plate is required as an additional preliminary product for this manufacturing process, which appears to be particularly suitable for compact lamps of higher power levels. The manufacture of this plate is only possible with special manufacturing devices, which leads to an undesirable increase in the price of the lamp.
  • the object of the invention is to provide a single-ended, low-pressure discharge lamp of the type mentioned at the beginning for, in particular, low power levels, which, as a compact lamp with low power consumption in terms of shape, size and light output, is comparable to an incandescent lamp and can therefore be used in existing lamps.
  • the lamp construction should have as few pre-products as possible and enable production on machines with high output in order to be able to offer the end product at low cost.
  • a low-pressure discharge lamp with the features mentioned in the preamble of the main claim is characterized in that both the melting of the current leads holding the preheatable electrodes in the one or more U-shaped inner tubes and the melting of the one or more U-shaped inner tubes in the outer bulb from a pinch and that the U-shaped inner tube (s) is or are positioned during the squeezing process by means of a holder remaining in the lamp and having at least one holding element.
  • the holding elements can consist of metallic material (eg spring steel) or of a temperature-resistant, advantageously translucent plastic.
  • the pump tube which is also squeezed into the melt, forms part of the holder to which the holding elements are attached.
  • a metallic holder for example a rigid wire
  • the holding elements advantageously have the U-shaped inner tubes, at least partially narrowly encompassing form of clips.
  • a construction is also possible in which the U-shaped inner tubes are positioned against one another and in the direction of the outer bulb by means of spacers. The U-shaped inner tubes held in this way and the outer bulb placed over them are then connected gas-tight to one another by a pinch, the ends of the inner tubes assigned to the electrodes being closed, the inner tubes being connected to the outer bulb and the outer bulb being closed in one operation.
  • the operating voltage of the lamp and thus its power consumption is increased by extending the discharge path by assigning a U-shaped inner tube to each of the two preheatable electrodes.
  • the longitudinal axes of the straight legs of both U-shaped inner tubes essentially form the corner points of a rhombus or a square, the diagonals of which form an intersection lying on the lamp longitudinal axis.
  • the discharge vessel consisting of outer bulbs and in particular the U-shaped inner tubes, preferably contains mercury and an inert gas as the filling.
  • an amalgam-forming substance can be applied inside, in the vicinity of the closed end. This has the effect that the mercury which has migrated into the outer bulb due to the thermal conditions occurring during operation is returned in a constant dynamic process, so that the entire volume of the inner tube or tubes is evenly filled with mercury vapor.
  • the UV radiation generated by the low-pressure discharge is converted into visible radiation by corresponding phosphor coatings on the inner surface of the inner tubes and, if appropriate, on the inner surface of the outer bulb. It has proven to be advantageous to use a so-called three-band phosphor which contains individual components emitting red, green and blue.
  • the coating of the outer bulb insofar as it has not been provided with a phosphor layer, different embodiments are possible. As is common with incandescent lamps, a clear glass or a light-scattering surface, such as internal matting or a siliconized coating possible.
  • the outer bulb is provided with a base at the electrode end, via which the lamp is electrically connected.
  • An electrical screw base is advantageously used, which can be used in conventional incandescent lamp holders.
  • the lamp can also be equipped with any other base. In conjunction with a ballast located inside the base, the lamp can be operated in any corresponding bulb holder.
  • the lamp according to the invention can also be operated via a conventional ballast choke which, for example, designed as an adapter to the lamp or is part of the lamp.
  • a compact low-pressure discharge lamp of the type described here is particularly suitable for small lamps with low electrical power consumption. Since no additional preliminary products, such as, for. B. melting plates or preformed plates are required, and the connection itself is made in only one operation, the manufacturing costs are reduced.
  • a holder remaining in the lamp, preferably having two holding elements per inner tube, is used for the exact positioning during the squeezing process of the preferably two U-shaped inner tubes, which at the same time also ensures good vibration resistance of the finished lamp.
  • the preheatable electrodes are advantageously held by a pearl base that has one-piece power supplies. Instead of the one-part power supply, multi-part power supplies can also be used.
  • the further processing to the finished lamp is largely carried out according to known work steps.
  • the low-pressure discharge lamp according to the invention has good lighting properties.
  • the interior structure described above is simple both in terms of construction and production technology and results in a sufficient length of the discharge path, in particular for lamps of low power.
  • FIG. 1 shows a U-shaped inner tube 1 made of glass with two straight legs 2 and 3.
  • the first leg 2 is extended by approximately 10 mm compared to the other leg 3.
  • a pearl base frame with the electrode coils (12 and 12 'in FIGS. 3 and 4) is inserted into the extended end 4 of the first leg 2.
  • This extended end 4 has no fluorescent coating.
  • the other leg 3 has a remaining opening 5 at its lower end.
  • the inner tube 1 has an outer diameter of approximately 12 mm. With a wall thickness of approx. 1.0 mm, the inner diameter is approx. 10.0 mm. There is a free space of approximately 3 mm between the legs 2 and 3.
  • the lamp assembled in FIG. 2 illustrates the arrangement of two identical, U-shaped inner tubes 1 and 1 'coated with phosphor in the outer bulb 6 in a plan view.
  • the outer bulb 6 has an outer diameter of approximately 40 mm.
  • the four legs 2, 3 and 2 ', 3' run parallel to one another, their longitudinal axes forming the corner points of a rhombus or a square.
  • the diagonals D and D 'connecting the corner points intersect in the lamp longitudinal axis.
  • Within the legs 2 and 2 ' are those with a pearl base preheatable electrodes (not shown).
  • Each of the U-shaped inner tubes 1 and 1 ' is positioned by two holding clips 7 and 7' (or 8 and 8 'in FIGS.
  • the holding clips 7 and 7 '(or 8 and 8') in the exemplary embodiment consist of spring steel 4 x 0.2 mm.
  • FIG 3 shows a completely squeezed lamp.
  • the squeeze 10 includes the one-piece power supply pairs 11 and 11 ', the extended parts 4 of each U-shaped inner tube 1 and 1', and the pump tube 9 and the holder 9 'running on the lamp axis. Between the current supply pairs 11 and 11 ', for which copper sheathed wire is a particularly suitable material, an electrode coil 12 and 12' is stretched in each case.
  • the pump tube 9 is melted close to the pinch 10 and the lamp is provided with a base 14, as shown in FIG.
  • a base 14 for direct connection to the network - e.g. when exchanged for an incandescent lamp - an electronic ignition and ballast device can be integrated in the base sleeve 13.
  • a low-pressure discharge lamp according to the invention has a discharge length of approximately 270 mm through the two U-shaped inner tubes.
  • the compact lamp contains mercury in a quantity of approx. 10 mg and approx. 300 Pa argon. With a supplied power of approx. 12 W, the lamp has an operating voltage of approx. 65 V and a lamp current of approx. 220 mA. The luminous flux is around 650 Im.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (8)

1. Lampe à décharge à basse pression à culot unilatéral, comportant une ampoule extérieure (6) fermée de façon étanche au gaz au moyen d'un bloc de scellement (10) et contenant un gaz et/ou une vapeur métallique de remplissage, deux électrodes (12, 12') pouvant être préchauffées, équipées d'organes d'alimentation en courant (11, 11') et montées sur le bloc de scellement (10) à l'intérieur de l'ampoule extérieure (6), ainsi qu'un ou deux tubes intérieurs en forme de U (1, 1') en verre, disposés également à l'intérieur de l'ampoule extérieure (6), la première extrémité (4) de l'une des branches rectilignes (2) de chaque tube intérieur (1,1') renfermant d'une manière étanche au gaz les organes d'alimentation en courant (11, 11') de l'une des électrodes (12, 12') pouvant être préchauffées, tandis que la seconde extrémité de l'autre branche rectiligne (3) de chaque tube intérieur (1, 1') possède une ouverture (5) qui est disposée à proximité du bloc de scellement (10), caractérisée en ce qu'aussi bien le bloc de scellement des organes d'alimentation en courant (11, 11') maintenant les électrodes (12, 12') pouvant être préchauffées, dans le ou les tubes intérieurs en forme de U (1, 1') que le bloc de scellement du ou des tubes intérieurs en forme de U (1, 1') dans l'ampoule extérieure (6) sont réalisées par une partie formée par pincement (10), et que le ou les tubes intérieurs en forme de U (1, 1') sont positionnés, pendant l'opération de pincement, au moyen d'un support (9') qui reste dans la lampe et possède au moins un organe de retenue (7, 7'; 8, 8').
2. Lampe à décharge à basse pression suivant la revendication 1, caractérisée par le fait qu'un tube de pompage (9) est également inséré par pincement dans le bloc de scellement (10).
3. Lampe de décharge à basse pression suivant les revendications 1 et 2, caractérisée par le fait que le tube de pompage"(9) et le support (9') positionnant les tubes intérieurs en forme de U (1, 1') forment un ensemble d'un seul tenant.
4. Lampe à décharge à basse pression suivant les revendications 1 à 3, caractérisée par le fait qu'un tube intérieur en forme de U (1, 1') est associé à chaque électrode (12, 12') pouvant être préchauffée, les axes longitudinaux des branches rectilignes des tubes intérieurs en forme de U (1, 1') formant, selon une vue en plan, sensiblement des angles d'un losange ou d'un carré, dont les diagonales (D, D') forment un point d'intersection situé sur l'axe longitudinal de la lampe.
5. Lampe é décharge à basse pression suivant l'une des revendications 1 à 4, caractérisée par le fait que la surface intérieure des tubes intérieurs en forme de U (1, 1') et/ou de l'ampoule extérieure (6) est garnie d'une substance luminescente.
6. Lampe à décharge à basse pression suivant la revendication 5, caractérisée par le fait que la couche de substance luminescente est formée de trois composantes différentes de substance luminescente.
7. Lampe à décharge à basse pression suivant les revendications 1 à 6, caractérisée par le fait que la surface extérieure de l'ampoule extérieure (6) possède une surface diffusant la lumière.
8. Procédé pour fabriquer une lampe à décharge à basse pression munie d'un socle unilatéral suivant la revendication 1, caractérisé par le fait que la zone formée par pincement (10) est réalisée en une étape opératoire.
EP84102130A 1983-03-04 1984-02-29 Lampe à décharge à basse pression avec culot à un côté Expired EP0118100B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3307763 1983-03-04
DE19833307763 DE3307763A1 (de) 1983-03-04 1983-03-04 Einseitig gesockelte niederdruckentladungslampe

Publications (2)

Publication Number Publication Date
EP0118100A1 EP0118100A1 (fr) 1984-09-12
EP0118100B1 true EP0118100B1 (fr) 1988-01-27

Family

ID=6192565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102130A Expired EP0118100B1 (fr) 1983-03-04 1984-02-29 Lampe à décharge à basse pression avec culot à un côté

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EP (1) EP0118100B1 (fr)
DE (2) DE3307763A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8600252A (nl) * 1986-02-03 1987-09-01 Philips Nv Lagedrukkwikdampontladingslamp.
DE4027783A1 (de) * 1990-09-03 1992-04-30 Holzer Walter Gasentladungsgeraet fuer kompaktlampen
HU214797B (hu) * 1994-11-23 1998-05-28 Ge Lighting Tungsram Rt. Egyoldalon fejelt kisülőlámpa
DE19546198A1 (de) * 1995-12-11 1997-06-12 Holzer Walter Prof Dr H C Ing Kompaktlampe
JP3115826B2 (ja) * 1996-07-01 2000-12-11 松下電子工業株式会社 電球形蛍光灯
DE19737920A1 (de) * 1997-08-27 1999-03-04 Walter Dipl Chem Dr Rer N Tews Niederdruck-Gasentladungslampe mit erhöhter Lebensdauer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076503A2 (fr) * 1981-10-06 1983-04-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge à basse pression à un seul culot et méthode de fabrication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2001501A (en) * 1933-03-10 1935-05-14 Gen Electric Gaseous electric discharge device
NL179854C (nl) * 1977-08-23 1986-11-17 Philips Nv Lagedrukkwikdampontladingslamp.
JPS54155675A (en) * 1978-05-30 1979-12-07 Matsushita Electronics Corp Small-sized fluorescent lamp
DE3271115D1 (en) * 1981-03-31 1986-06-19 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Method for manufacturing a pinched seal for an electric lamp envelope and pinching device for carrying out the method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076503A2 (fr) * 1981-10-06 1983-04-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge à basse pression à un seul culot et méthode de fabrication

Also Published As

Publication number Publication date
EP0118100A1 (fr) 1984-09-12
DE3469105D1 (en) 1988-03-03
DE3307763A1 (de) 1984-09-06

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