EP0040812A1 - Lampe à décharge à basse pression - Google Patents

Lampe à décharge à basse pression Download PDF

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Publication number
EP0040812A1
EP0040812A1 EP19810103877 EP81103877A EP0040812A1 EP 0040812 A1 EP0040812 A1 EP 0040812A1 EP 19810103877 EP19810103877 EP 19810103877 EP 81103877 A EP81103877 A EP 81103877A EP 0040812 A1 EP0040812 A1 EP 0040812A1
Authority
EP
European Patent Office
Prior art keywords
inner tube
low
pressure discharge
discharge lamp
tube
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.)
Withdrawn
Application number
EP19810103877
Other languages
German (de)
English (en)
Inventor
Lothar Busch
Fritz Dr. Dipl.-Phys. Schipp
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 EP0040812A1 publication Critical patent/EP0040812A1/fr
Withdrawn legal-status Critical Current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
    • H01J61/30—Vessels; Containers

Definitions

  • the invention relates to a low-pressure discharge lamp in which the discharge space, which contains a gas and / or metal vapor filling and two main electrodes, is formed by a sealed outer bulb and an inner tube arranged therein, one end of the inner tube being closed and the other End is open to the outer bulb and the two electrodes are each arranged at the closed end of the inner tube, namely one electrode inside and the other electrode outside the tube.
  • Lamps with such a construction which work on the low-pressure discharge principle, are provided for one-sided base. Because of their greatly shortened design compared to conventional low-pressure discharge lamps, they are referred to as so-called compact lamps. Equipped with a screw base - or via a corresponding base adapter - which contains the ballast and possibly a starting element, these lamps can also be operated in standard incandescent lamp holders. Such compact lamps are therefore suitable for the direct replacement of incandescent lamps with a corresponding design. Due to their higher efficiency for converting the absorbed electrical energy into useful radiation and due to their longer lifespan, the compact lamps are more economical than incandescent lamps.
  • compact lamps have so far not been able to prevail.
  • the proposed constructions are still too complex, which means high manufacturing costs and ultimately also a high selling price, on the other hand, the lamps simpler construction, the light output is not yet satisfactory.
  • the general endeavor in the development of compact lamps is to achieve a size that corresponds to that of incandescent lamps and to achieve the light outputs which are emitted by 60 to 100 W incandescent lamps, which requires a power consumption of 15 to 25 W for the compact lamps makes.
  • JP-PA 49-35 796 e.g. a fluorescent lamp with a base on one side is known, in which a linear inner tube is arranged coaxially in a tubular outer bulb. The latter has a closed end and an end open to the outer bulb. The outer bulb is sealed on the base side by a conventional lamp base, into which the current leads for the electrodes are melted and which also serves as a carrier for the inner tube.
  • One of the two electrodes is located in the inner tube and the other outside the tube - each at the foot. This measure roughly doubles the discharge path.
  • JP-PA 45-7518 in which a straight inner tube is also used to extend the discharge path, this is arranged asymmetrically in the tubular outer bulb.
  • the electrode-side end of the outer bulb is closed here by immersion in a melt.
  • the lamp outer bulb contains one or two U-shaped inner tubes, each with a closed and an open end.
  • an electrode is arranged at the closed end inside the tube and an electrode at the open end outside the tube.
  • both electrodes are located at the closed ends within the tubes.
  • an extension of the discharge path is achieved by axially extending partition walls which are sealed off from the longitudinal walls of the tubular discharge vessel.
  • the partition runs between the two electrodes, which are each located on the same end face of the discharge vessel. While at the end of the electrode the partition closes tightly with the vessel wall, a passage for the discharge is provided at the opposite end of the vessel between the partition and the vessel. Due to the required sealing measures, such a lamp construction is relatively complex to manufacture.
  • the invention has for its object to provide a single-socket low-pressure discharge lamp of compact design, in which the extension of the discharge path is solved by a simple construction, which in particular allows cost-effective production.
  • the lamp should have a luminous flux that is comparable to that of an incandescent lamp of 60 to 100 W.
  • the low-pressure discharge lamp with the features mentioned in the preamble of the main claim is characterized according to the invention in that the inner tube is wound in a screw or spiral manner around the longitudinal axis of the lamp. Given the compact dimensions of the outer bulb, this construction results in a considerable length for the discharge path.
  • the power consumption of the lamp (without ballast) or its luminous efficacy is determined in particular by the length of the tortuous inner tube and the respective inner diameter.
  • An increase in the operating voltage is achieved by increasing the number of turns (lengthening the discharge path) or reducing the tube diameter, which means an increase in output. At the same time, these measures also increase the luminous efficiency under certain conditions.
  • the luminous efficiency decreases again from a certain lower tube diameter, so that expediently this tube diameter should not be undercut or should not be undershot.
  • the inner diameter of the inner tube must be at least 5 mm in order to obtain favorable operating values.
  • the preferred range for the inside diameter of the tube is between 8 and 16 mm.
  • An upper limit is given in particular by the requirement for a compact design.
  • the outer envelope of the tortuous inner tube has essentially the shape of a cylinder, ie all turns have approximately the same diameter. From manufacturing technology Reasons can be slightly different from the cylindrical shape (for example, with a weakly conical shape) in order to enable the winding tube to be safely removed from the molding part during the manufacturing process.
  • the outer envelope curve of the winding inner tube has approximately the shape of a truncated cone. There is a greater difference in diameter between adjacent turns here.
  • slightly modified shapes are also cheap to manufacture.
  • the pitch between adjacent turns is preferably the same over the entire inner tube, with the exception of the end regions. This gives simple winding forms. More complicated winding shapes than the ones described above - such as an ellipsoid shape - are conceivable, but require a greater manufacturing outlay.
  • the inner tube which extends the discharge path is advantageously fastened in the outer bulb at its closed end, on which the electrodes are also arranged.
  • the latter is e.g. sealed by a conventional foot, in which the power supply lines for the electrodes are melted, the inner tube then being fused to the foot part.
  • the closed end of the tube lies with its longitudinal axis in the longitudinal axis of the lamp.
  • This tube area can be expanded in diameter compared to the rest of the inner tube in order to give the necessary space for the electrode located in the tube.
  • the open end of the inner tube ends e.g. in a helical or spiral turn, but can also run differently in order to achieve a specific discharge direction, e.g. be angled towards the lamp's longitudinal axis.
  • a wide variety of shapes are suitable for the outer bulb.
  • a bulb in the form of a conventional incandescent lamp has proven particularly useful.
  • Pistons in the shape of cylinders, ellipsoids or spheres can also be used advantageously.
  • more abstract shapes are also conceivable for the outer bulb.
  • the discharge vessel consisting of an outer bulb and an inner tube, contains, in particular, mercury and an inert gas as the filling.
  • the UV radiation emitted by the low-pressure discharge is converted into visible radiation by corresponding phosphor coatings on the inner surface of the outer bulb and on the inner and / or outer surface of the inner tube.
  • a so-called three-band phosphor as the phosphor.
  • the latter consists of three individual components, each of which emits in red, green and blue when excited.
  • the individual surface coatings of the outer bulb (inside) and inner tube (inside and outside) can each consist of a different phosphor or phosphor mixture.
  • the outer bulb is provided at the end on the electrode side with a base via which the lamp is electrically connected.
  • a conventional screw base is advantageously used, which can be used in incandescent lamp holders.
  • the lamp can be equipped with any base, e.g. also with a bayonet base.
  • a specially developed electronic ballast is housed inside the base. With a suitable base, this enables operation in any bulb holder, i.e. directly on the mains.
  • the lamp according to the invention can also be operated via a conventional ballast choke, which is e.g. housed in an adapter or part of the luminaire.
  • the low-pressure discharge lamp according to the invention has good lighting properties.
  • the interior structure described above is simple in terms of construction, but results in a considerable lengthening of the discharge path, as a result of which a relatively high luminous flux and a good luminous efficacy can be achieved.
  • a substitution of incandescent lamps is possible, whereby the advantages of a light output that is more than three times higher and a significantly longer lifespan can be used.
  • the compact lamp shown in FIG. 1 has a pear-shaped outer bulb 1 which contains an inner tube 2 which extends the discharge path.
  • Outer bulb 1 and inner tube 2 are made of glass, for example a soft glass.
  • the inner tube 2, which has a closed end 3 and an open end 4, is helically wound around the longitudinal axis of the lamp.
  • the outer envelope of the winding tube 2 here has the shape of a cylinder.
  • the pitch between adjacent turns is constant over the entire length of the inner tube 2.
  • the two glow electrodes 5 and 6 are each located at the closed end 3 of the inner tube 2.
  • One electrode 5 is arranged inside and the other electrode 6 outside the tube 2.
  • the discharge path thus leads from the electrode 5 through the winding inner tube 2 via the space between the outer bulb 1 and the inner tube 2 to the counterelectrode 6.
  • the end of the outer bulb 1 on the electrode side is sealed by a glass base 7. This forms the feedthrough for the power supply lines 8 and 9 of the two electrodes 5, 6.
  • the pump tube 10 (here in substitute melted state).
  • the inner tube 2 is melted at its closed end 3 on the foot 7, which thus forms the support for the inner tube 2.
  • the end region 3, which is arranged with its longitudinal axis in the longitudinal axis of the lamp and which contains the electrode 5, is somewhat enlarged in diameter compared to the rest of the inner tube 2; otherwise, the tube 2 has a constant inside and outside diameter.
  • the outer diameter of the tube 2 is, for example, 13 mm in the tortuous part; for the inside diameter - with a wall thickness of 0.8 mm - there is a dimension of 11.4 mm.
  • the inner tube 2 has a diameter of 16 mm outside or 14 mm inside.
  • the inner tube 2 is here, for example, provided with 3 1/2 turns, the outer diameter of the coil being 42 mm.
  • the open tube end 4, which ends here in one turn, is about 90 mm from the inner electrode 5 and about 100 mm from the outer electrode 6. With these dimensions, the winding tube 2 gives a discharge length of approximately 480 to 500 mm.
  • the outer bulb 1 is provided on its inside and the inner tube 2 on the inside and outside with a phosphor coating.
  • the individual phosphor layers can each consist of a different phosphor or phosphor mixture.
  • the lamp which has an outer bulb of approx. 110 mm in diameter (greatest width) and 150 mm in length (measured from the lower edge of the foot melting to the top of the bulb), contains 15 mg of mercury and argon with a filling pressure of about 3 mbar .
  • the outer bulb 1 carries a base part 11 which has a screw thread 12.
  • An electronic ballast 13 is contained in the interior of the base 11, via which the discharge lamp is operated at an audio frequency of approximately 25 kHz.
  • the compact lamp described above has a power consumption of approximately 20 W without a ballast. With ballast, the power consumption increases by approx. 2.5 W.
  • the lamp operating voltage is 80 V, while the lamp current is approximately 250 mA. At these operating values, a luminous flux of 1000 lm is achieved.
  • FIG. 2 shows the same structure of the lamp. Only the inner tube 2 'is wound in a spiral around the longitudinal axis of the lamp; the individual turns increase in diameter from the base 7 to the piston crown.
  • the outer envelope of the coiled tube 2 ' has the shape of a truncated cone. The pitch between adjacent turns is constant over the entire length of the inner tube 2 '.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
EP19810103877 1980-05-22 1981-05-20 Lampe à décharge à basse pression Withdrawn EP0040812A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3019605 1980-05-22
DE19803019605 DE3019605A1 (de) 1980-05-22 1980-05-22 Niederdruck-entladungslampe

Publications (1)

Publication Number Publication Date
EP0040812A1 true EP0040812A1 (fr) 1981-12-02

Family

ID=6103082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810103877 Withdrawn EP0040812A1 (fr) 1980-05-22 1981-05-20 Lampe à décharge à basse pression

Country Status (3)

Country Link
EP (1) EP0040812A1 (fr)
JP (1) JPS5719954A (fr)
DE (1) DE3019605A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995027999A1 (fr) * 1994-04-11 1995-10-19 Ge Lighting Limited Couche de phosphore pour lampe a decharge sans electrode
EP0682355A1 (fr) * 1993-11-29 1995-11-15 Nippon Lighting Electric Co. Ltd. Lampe fluorescente sous forme d'ampoule et son procede de fabrication
DE19753016A1 (de) * 1997-12-01 1999-06-02 Holzer Walter Prof Dr H C Ing Energiesparlampe mit Schutzhülle
EP1059658A1 (fr) * 1999-06-02 2000-12-13 PROMATEC GmbH Berlin, Sondermaschinen und Elektronik Lampe luminescente à gaz, notamment lampe à décharge au gaz à basse pression

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4011213A1 (de) * 1990-03-19 1991-09-26 Holzer Walter Compact-leuchtstofflampe
DE29511173U1 (de) * 1994-07-30 1995-09-14 Schiller, Christa, 90429 Nürnberg Kompakt-Leuchtstofflampe mit Glühlampensockel, insbesondere mit Sockelgewinde Typ E 27 oder E 14
DE29500786U1 (de) * 1995-01-19 1995-04-06 Piruzram, Mansur, 95180 Berg Energiesparlampe
DE19501500A1 (de) * 1995-01-19 1996-07-25 Mansur Piruzram Energiesparlampe
DE19513357A1 (de) * 1995-04-06 1996-10-10 Walter Holzer Elektrodenanordnung in Leuchtstofflampen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725412A1 (de) * 1976-06-17 1977-12-29 Philips Nv Niederdruckgasentladungslampe
DE2724603A1 (de) * 1977-06-01 1978-12-14 Wilhelm Dr Ing Lepper Leuchtstoffwendelroehre
DE2835574A1 (de) * 1977-08-23 1979-03-01 Philips Nv Niederdruckquecksilberdampfentladungslampe
DE2904864A1 (de) * 1978-02-14 1979-08-16 Philips Nv Niederdruckquecksilberdampfentladungslampe
DE2928025A1 (de) * 1978-07-11 1980-01-24 Westinghouse Electric Corp Elektrische niederdruck-entladungslampe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725412A1 (de) * 1976-06-17 1977-12-29 Philips Nv Niederdruckgasentladungslampe
DE2724603A1 (de) * 1977-06-01 1978-12-14 Wilhelm Dr Ing Lepper Leuchtstoffwendelroehre
DE2835574A1 (de) * 1977-08-23 1979-03-01 Philips Nv Niederdruckquecksilberdampfentladungslampe
DE2904864A1 (de) * 1978-02-14 1979-08-16 Philips Nv Niederdruckquecksilberdampfentladungslampe
DE2928025A1 (de) * 1978-07-11 1980-01-24 Westinghouse Electric Corp Elektrische niederdruck-entladungslampe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0682355A1 (fr) * 1993-11-29 1995-11-15 Nippon Lighting Electric Co. Ltd. Lampe fluorescente sous forme d'ampoule et son procede de fabrication
EP0682355A4 (fr) * 1993-11-29 1997-05-28 Nippon Lighting Electric Co Lt Lampe fluorescente sous forme d'ampoule et son procede de fabrication.
WO1995027999A1 (fr) * 1994-04-11 1995-10-19 Ge Lighting Limited Couche de phosphore pour lampe a decharge sans electrode
DE19753016A1 (de) * 1997-12-01 1999-06-02 Holzer Walter Prof Dr H C Ing Energiesparlampe mit Schutzhülle
EP1059658A1 (fr) * 1999-06-02 2000-12-13 PROMATEC GmbH Berlin, Sondermaschinen und Elektronik Lampe luminescente à gaz, notamment lampe à décharge au gaz à basse pression

Also Published As

Publication number Publication date
DE3019605A1 (de) 1981-11-26
JPS5719954A (en) 1982-02-02

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19820517

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19840511

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHIPP, FRITZ, DR. DIPL.-PHYS.

Inventor name: BUSCH, LOTHAR