EP0888634A1 - Lampe a decharge basse pression - Google Patents

Lampe a decharge basse pression

Info

Publication number
EP0888634A1
EP0888634A1 EP97931677A EP97931677A EP0888634A1 EP 0888634 A1 EP0888634 A1 EP 0888634A1 EP 97931677 A EP97931677 A EP 97931677A EP 97931677 A EP97931677 A EP 97931677A EP 0888634 A1 EP0888634 A1 EP 0888634A1
Authority
EP
European Patent Office
Prior art keywords
low
pressure discharge
discharge lamp
mercury
carrier body
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.)
Granted
Application number
EP97931677A
Other languages
German (de)
English (en)
Other versions
EP0888634B1 (fr
Inventor
Erolf Weinhardt
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 EP0888634A1 publication Critical patent/EP0888634A1/fr
Application granted granted Critical
Publication of EP0888634B1 publication Critical patent/EP0888634B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel

Definitions

  • the invention relates to a low-pressure discharge lamp according to the preamble of protection claim 1.
  • Japanese laid-open specification JP 6-96728 discloses a low-pressure mercury vapor discharge lamp with two, essentially identical, electrode racks which are melted into the ends of the tubular discharge vessel.
  • the electrode frames each have an electrode coil arranged transversely to the discharge vessel axis, which is surrounded by an annular metal band - a so-called ring cap.
  • the ring axis of this annular metal strip runs parallel to the discharge vessel axis.
  • the ring cap is composed of two sections, of which one section is coated with an amalgam, in particular with a mercury-titanium alloy, while the other section is provided with a getter layer which binds gaseous impurities in the discharge vessel.
  • the amount of mercury in the low-pressure discharge lamp is controlled over the length of the first section.
  • the ring caps are inductively heated to a temperature of approx. 900 ° C to 950 ° C using an electromagnetic high-frequency signal. This activates the getter on the one hand and releases the mercury from the mercury alloy on the other.
  • the required high-frequency signal is usually generated by means of a high-frequency inductor testifies, which has an induction loop with two long, parallel legs and which generates an electromagnetic radio frequency field at the location of the ring caps, the magnetic field of which runs essentially parallel to the discharge vessel axis and thus also parallel to the ring axis of the ring caps.
  • the lamps take approximately 20 to 30 seconds to pass through this high-frequency field. Due to their dimensions, such ring caps are not suitable for low-pressure discharge lamps, the discharge vessel of which has an outer diameter of less than or equal to 16 mm.
  • German patent DE 26 16 577 describes a low-pressure discharge lamp, in particular a fluorescent lamp, which is provided with a mercury-containing ionizable filling within the discharge vessel.
  • the proportion of mercury in the ionizable discharge medium here is approximately 5 mg to 20 mg. Since such small amounts of mercury are difficult to meter in droplet form, the mercury is introduced into the discharge vessel with the aid of a carrier body which is provided with a coating containing mercury and additionally with a getter.
  • the coating containing mercury and the getter are applied to a metal strip which is arranged parallel to the longitudinal axis of the lamp and is part of an electrode frame of the low-pressure discharge lamp, that is to say the coated surfaces of the metal strip run essentially parallel to the axis.
  • the metal strip is inductively heated to a temperature of approximately 900 ° C. to 950 ° C. for approximately 20 to 30 seconds during lamp manufacture using an electromagnetic high-frequency signal.
  • this carrier body should also be suitable for low-pressure discharge lamps which have a mercury content of less than 10 mg and whose discharge vessel outer diameter is less than or equal to 16 mm.
  • the high-frequency inductor which is used to manufacture the low-pressure discharge lamps equipped with the ring caps described above, can also be used for the manufacture of the lamps provided with the improved carrier body, so that no conversion of the production line is required.
  • the low-pressure discharge lamp according to the invention has a tubular discharge vessel which has a longitudinal axis at least in the region of its ends and in the interior of which one or more carrier bodies are arranged, the at least one first surface provided with a mercury-containing coating and at least one second surface provided with a getter layer has or have.
  • These surfaces of the carrier body or the carrier bodies coated in this way are inclined according to the invention by an angle of at least 30 degrees with respect to the longitudinal axis of the tubular discharge vessel or against the longitudinal axes of the discharge vessel ends.
  • the carrier bodies of the low-pressure discharge lamps according to the invention are usually ductive heating of the ring caps used high-frequency inductor can be heated sufficiently inductively.
  • the lamp ends or the discharge vessel ends pass through the electromagnetic field of the high-frequency inductor, whose magnetic field lines at the location of the carrier body run essentially parallel to the longitudinal axis of the discharge vessel or the discharge vessel end. Since the surfaces of the carrier body provided with the getter layer and the mercury-containing coating are inclined by at least 30 degrees against the longitudinal axis of the discharge vessel end, the electromagnetic field of the high-frequency inductor, due to its favorable orientation, causes the Carrier body induces a comparatively high current and thus enables sufficient heating of these surfaces.
  • the high-frequency field achieves its optimum effect when the magnetic field lines are oriented perpendicular to the surfaces provided with getter material and a coating containing mercury.
  • the surfaces of the carrier bodies of the low-pressure discharge lamps according to the invention coated with the getter and with the mercury alloy are advantageously arranged perpendicular to the longitudinal axis of the discharge vessel end.
  • the carrier body advantageously consists of a metal sheet which is coated with the getter material and with the mercury alloy.
  • This metal sheet takes up less space than an annular cap and is therefore particularly suitable for low-pressure discharge lamps whose discharge vessel has only a comparatively small diameter - in particular an outer discharge vessel diameter of less than or equal to 16 mm - or in which the use of an annular cap is disadvantageous.
  • a complete release of the mercury bound in the mercury-containing coating and thus an optimal heating of the carrier body is particularly important, so that the optimum mercury vapor pressure can be established in the discharge space during lamp operation.
  • the carrier body is advantageously designed as a substantially flat metal sheet oriented perpendicular to the longitudinal axis of the discharge vessel end, the front of which is provided with the mercury-containing coating and the rear of which is provided with the getter layer. These metal sheets are advantageously welded to a power supply wire for the electrode filament of the lamp. This enables a simple construction of the electrode frame.
  • the carrier body is advantageously designed as a U-shaped or V-shaped metal sheet, the U or V legs of which, arranged transversely or obliquely to the longitudinal axis of the discharge vessel, with the getter material and with the mercury alloy are coated.
  • Figure 1 is a schematic side view of one end of a low pressure discharge lamp according to the first embodiment of the invention 2 shows a schematic side view of the lamp end from FIG. 1 rotated through 90 °
  • FIG. 3 shows a schematic side view of one end of a low-pressure discharge lamp in accordance with the second exemplary embodiment of the invention
  • FIG. 4 shows a schematic side view of the lamp end from FIG. 3 rotated by 90 °
  • Figure 5 is a schematic side view of one end of a low pressure discharge lamp according to the third embodiment of the invention.
  • FIG. 6 shows a schematic side view of the lamp end from FIG. 5 rotated by 90 °
  • Figure 7 is a schematic side view of one end of a low pressure discharge lamp according to the fourth embodiment of the invention.
  • Figure 8 is a schematic side view of one end of a low pressure discharge lamp according to the fifth embodiment of the invention.
  • FIG. 9 is a schematic side view of the lamp end from FIG. 8 rotated through 90 °
  • the lamp according to the invention is a low-pressure mercury vapor discharge lamp and in particular a fluorescent lamp.
  • This lamp has a tubular discharge vessel 10, 20, 30, 40, 50 which can be rod-shaped, U-shaped or also bent several times. The two ends of the discharge vessel are sealed gas-tight. With the ends of the discharge vessel 10, 20, 30, 40, 50, an electrode frame 11, 21, 31, 41, 51 is fused.
  • the electrode frames 11, 21, 31, 41, 51 each have an electrode coil 11a, 21a, 31a, 41a, 51a and two current supply wires 11b, 11c, 21b, which are electrically conductively connected to the ends of the electrode coil 11a, 21a, 31a, 41a, 51a, 21c, 31b, 31c, 41b, 41c, 51b, 51c.
  • the electrode coils 11a, 21a, 31a, 41a, 51a are arranged in the interior of the discharge vessel 10, 20, 30, 40, 50 and transverse to the longitudinal axis AA of the end of the discharge vessel 10, 20, 30, 40, 50.
  • the outer diameter of the discharge vessel 10, 20, 30, 40, 50 is approximately 16 mm.
  • On one of the two electrode frames 11, 21, 31, 41, 51 a is a metal sheet 12, 22 coated with a getter 14, 24, 34, 44, 54 and provided with a coating 13, 23, 33, 43, 53 containing mercury , 32, 42, 52 attached.
  • the metal sheets act as a carrier body for the getter material and for the layer containing mercury.
  • the getter material 14, 24, 34, 44, 54 is a zirconium aluminum getter and the mercury-containing layer 13, 23, 33, 43, 53 is a mercury-titanium alloy.
  • the power supply wires 11b, 11c, 21b, 21c, 31b, 31c, 41b, 41c, 51b, 51c are led out of the end of the discharge vessel 10, 20, 30, 40, 50.
  • the amount of mercury introduced into the discharge vessel 10, 20, 30, 40, 50 with the aid of the carrier body is approximately 3 mg. So far, all five exemplary embodiments are the same.
  • FIG. 1 and 2 show one end of a low-pressure discharge lamp according to the first exemplary embodiment of the invention in a schematic illustration.
  • the end of the discharge vessel 10 is fused to the electrode frame 11 in the manner of a so-called plate foot melting l ld, l lf.
  • the electrode frame 11 consists of a glass plate foot 10d, the widened edge 11f of which ends with the end of the tubular discharge vessel 10 is fused gas-tight, from an electrode coil 11a arranged transversely to the longitudinal axis AA of the discharge vessel end and from two current supply wires 11b, 11c, each of which is electrically conductively connected to one end of the electrode coil 11a and which is melted into the plate base 11d.
  • the glass plate base 1 ld is provided with a pump handle l le, which serves to evacuate the discharge vessel 10.
  • a rectangular, essentially flat metal sheet 12 is welded to one of the power supply wires 11b, one side of which carries the coating 13 containing mercury, while the other side is coated with the getter 14.
  • the metal sheet 12 is oriented perpendicular to the longitudinal axis AA, so that the underside of the metal sheet 12 coated with the getter 14 faces the plate base 11d and the top of the metal sheet 12 provided with the layer containing mercury faces the electrode coil 11a.
  • the metal sheet 12 has a welding flag 12a bent at right angles on its edge.
  • FIGS. 3 and 4 show one end of a low-pressure discharge lamp according to the second exemplary embodiment of the invention in a schematic illustration.
  • the end of the discharge vessel 20 is also fused here, completely analogous to the first exemplary embodiment, with the electrode frame 21 in the manner of a plate foot melting 21d, 21f.
  • the electrode frame 21 of the second embodiment does not differ from the electrode part 11 of the first embodiment. It also consists of an electrode coil 21a, two power supply wires 21b, 21c and a glass plate base 21d provided with a pump handle 21e, the enlarged edge 21f of which is fused to the end of the discharge vessel.
  • the second embodiment has a U-shaped metal Sheet 22, which serves as a carrier body for the getter 24 and the layer 23 containing mercury.
  • the base part of the metal sheet 22 connecting the two U-legs is welded to the one power supply wire 21b, so that the outer and inner sides of the U-legs are aligned perpendicular to the longitudinal axis AA of the end of the discharge vessel 20.
  • the mercury-containing coating 23 is applied to the outside of the U-leg of the metal sheet 22 facing the electrode coil 21a, while the getter layer is applied to the outside of the other U-leg of the metal sheet 12 facing the plate base 21d.
  • FIGS. 5 and 6 show one end of a low-pressure discharge lamp according to the third exemplary embodiment of the invention in a schematic illustration.
  • the end of the discharge vessel 30 is, as already described in the first two exemplary embodiments, fused to the electrode frame 31 in the manner of a plate foot melting 31d, 31f.
  • the electrode frame 31 of the third exemplary embodiment does not differ from the electrode frames 11, 21 of the first two exemplary embodiments. It also consists of an electrode coil 31a, two power supply wires 31b, 31c and a glass plate base 31d provided with a pump stem 31e, the enlarged edge 31f of which is fused to the end of the discharge vessel.
  • the third exemplary embodiment has a V-shaped metal sheet 32 which serves as a carrier body for the getter 34 and the layer 33 containing mercury.
  • the V-shaped metal sheet is held with the aid of a multi-angled wire 35, which is welded to a V-leg of the metal sheet 32 and melted into the glass plate foot 31d.
  • the outer and inner surfaces of the V-legs of the metal sheet 32 are at an angle to the longitudinal axis AA of the discharge vessel end. judges. With it you form an angle between approx. 30 ° and 60 °.
  • the metal sheet 32 is here arranged below the electrode coil 31a, that is, between the electrode coil 31a and the glass plate base 31d.
  • the layer 33 containing mercury is applied to the outer surface of the one V-leg facing the electrode coil 31a, while the getter layer 34 is applied to the outer surface of the other V-leg of the metal sheet 32 facing the electrode coil 31a.
  • FIG. 7 shows a schematic illustration of one end of a low-pressure discharge lamp according to the fourth exemplary embodiment of the invention.
  • the electrode frame 41 consists of an electrode coil 41a aligned transversely to the longitudinal axis AA of the discharge vessel end, two power supply wires 41b, 41c and a glass bead 41d.
  • the power supply wires 41b, 41c are each electrically conductively connected to one end of the electrode coil 41a and melted into the glass bead 41d.
  • the glass bead 41 gives the electrode frame 41 mechanical stability.
  • the end of the discharge vessel 40 is sealed gas-tight by means of a pinch seal 40a.
  • the power supply wires 41b, 41c are melted gas-tight in the pinch seal 40a and protrude from the end of the discharge vessel.
  • a metal sheet 42 is welded to the one power supply wire 40b, one side of which carries the coating 43 containing mercury, while the other side is coated with the getter 44.
  • the metal sheet 42 is oriented perpendicular to the longitudinal axis AA of the discharge vessel end, so that the underside of the metal sheet 42 coated with the getter 44 faces the pinch seal 40a and the top of the metal sheet 12 provided with the layer containing mercury faces the electrode coil 41a.
  • the metal sheet 42 has at its edge a right-angled welding flag 42 a.
  • FIGS. 8 and 9 show one end of a low-pressure discharge lamp according to the fifth exemplary embodiment of the invention in a schematic illustration.
  • the end of the discharge vessel 50 is, as already described in the third exemplary embodiment, fused to the electrode frame 51 in the manner of a plate foot melting 51d, 51f.
  • the electrode frame 51 of the fifth exemplary embodiment does not differ from the electrode frame 31 of the third exemplary embodiment. It also consists of an electrode coil 51a, two power supply wires 51b, 51c and a glass plate base 51d provided with a pump stem 51e, the enlarged edge 51f of which is fused to the end of the discharge vessel.
  • the fifth exemplary embodiment has a V-shaped metal sheet 52 which serves as a carrier body for the getter 54 and the layer 53 containing mercury.
  • the V-shaped metal sheet 52 is also held with the aid of a multi-angled wire 55, which is welded to a V-leg of the metal sheet 52 and melted into the glass plate base 51d.
  • the outer and inner surfaces of the V-legs of the metal sheet 52 are aligned obliquely to the longitudinal axis AA of the discharge end.
  • the opening angle of the V-shaped metal sheet 52 is between approximately 110 degrees and 120 degrees, so that both V-legs form an angle of approximately 55 degrees to 60 degrees with the longitudinal axis A-A.
  • the metal sheet 52 is here arranged above the electrode coil 51a.
  • the mercury-containing layer 53 is applied to the outer surface of one V-leg facing away from the electrode coil 51a, while the getter layer 54 is applied to the Coil 51a facing away from the outer surface of the other V-leg of the metal sheet 52 is applied.
  • the invention is not limited to the exemplary embodiments explained in more detail above.
  • the V-shaped metal sheets of the exemplary embodiments three and five can also be fastened to a power supply wire by means of a fastening wire.
  • the mercury-titanium alloy other alloys or compounds containing mercury can also be used the mercury-containing coating of the carrier body according to the invention can be used.

Landscapes

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

Abstract

L'invention concerne une lampe à décharge basse pression comportant au moins un élément porteur (12) logé dans l'espace intérieur du récipient à décharge (10), qui est muni d'un revêtement (13) contenant du mercure et est revêtu d'un matériau getter (14). Les surfaces revêtues de l'élément porteur (12) sont inclinées selon un angle d'au moins 30° par rapport à l'axe longitudinal (A-A) du récipient à décharge (10).
EP97931677A 1996-09-30 1997-06-27 Lampe a decharge basse pression Expired - Lifetime EP0888634B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29616879U 1996-09-30
DE29616879U DE29616879U1 (de) 1996-09-30 1996-09-30 Niederdruckentladungslampe
PCT/DE1997/001355 WO1998014983A1 (fr) 1996-09-30 1997-06-27 Lampe a decharge basse pression

Publications (2)

Publication Number Publication Date
EP0888634A1 true EP0888634A1 (fr) 1999-01-07
EP0888634B1 EP0888634B1 (fr) 2002-02-13

Family

ID=8029845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97931677A Expired - Lifetime EP0888634B1 (fr) 1996-09-30 1997-06-27 Lampe a decharge basse pression

Country Status (14)

Country Link
US (1) US6043603A (fr)
EP (1) EP0888634B1 (fr)
JP (1) JPH11500865A (fr)
KR (1) KR100371018B1 (fr)
CN (1) CN1118856C (fr)
AU (1) AU729283B2 (fr)
BR (1) BR9706769A (fr)
CA (1) CA2238927C (fr)
CZ (1) CZ294861B6 (fr)
DE (2) DE29616879U1 (fr)
HU (1) HU220820B1 (fr)
IN (1) IN192589B (fr)
SK (1) SK284606B6 (fr)
WO (1) WO1998014983A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6639351B1 (en) * 1999-03-19 2003-10-28 Industrial Technologies Research Institute Planar fluorescent lamp with flat electrodes and method for fabricating
US6380676B1 (en) * 2000-01-03 2002-04-30 General Electric Company Discharge lamp with end of life arc extinguishing structure
US6853118B2 (en) * 2001-05-03 2005-02-08 General Electric Company Control of leachable mercury in mercury vapor discharge lamps
DE10325552A1 (de) * 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe mit Außenkolben und zugehöriger Trägerkörper
DE10325554A1 (de) 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zur Herstellung einer elektrischen Lampe mit Außenkolben
EP1649489A2 (fr) * 2003-06-26 2006-04-26 Koninklijke Philips Electronics N.V. Lampe a decharge a vapeur de mercure a basse pression
ITMI20042516A1 (it) * 2004-12-27 2005-03-27 Getters Spa Processo per produrre mediante deposizione di lega bassofondente dispositivi portanti almeno un materiale attivo
DE102007033879A1 (de) 2007-07-20 2009-01-22 Osram Gesellschaft mit beschränkter Haftung Trägerelement, an welchem ein Hg-haltiges Material zur Anbringung in eine Entladungslampe ausgebildet ist, und Entladungslampe mit einem derartigen Trägerelement
DE102007033878A1 (de) 2007-07-20 2009-01-22 Osram Gesellschaft mit beschränkter Haftung Trägerelement, an welchem ein Hg-haltiges Material zur Anbringung in einer Entladungslampe ausgebildet ist, sowie ein Verfahren zu dessen Herstellung und eine Entladungslampe mit einem derartigen Trägerelement
DE102007046342A1 (de) 2007-09-27 2009-04-02 Osram Gesellschaft mit beschränkter Haftung Quecksilberhaltiges Element für eine Entladungslampe sowie Trägerteil und Entladungslampe mit einem quecksilberhaltigen Element
ITMI20082187A1 (it) * 2008-12-11 2010-06-12 Getters Spa Sistema dispensatore di mercurio per lampade a fluorescenza
ITMI20100285A1 (it) * 2010-02-23 2011-08-24 Getters Spa Metodo e sistema per l'erogazione controllata di mercurio e dispositivi prodotti con tale metodo
DE102011006708A1 (de) * 2011-04-04 2012-10-04 Osram Ag Entladungslampe, insbesondere Quecksilber-Niederdruckentladungslampe
DE102011006700A1 (de) * 2011-04-04 2012-10-04 Osram Ag Entladungslampe, insbesondere Quecksilber-Niederdruckentladungslampe, sowie Verfahren zum Herstellen einer Entladungslampe
DE102011078152A1 (de) 2011-06-27 2012-12-27 Narva Lichtquellen Gmbh + Co. Kg Niederdruckentladungslampe mit in Abschirmung eingebrachtem Getter

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DE2616577A1 (de) * 1975-04-21 1976-11-04 Gte Sylvania Inc Niederdruck-quecksilberdampflampe
US4308650A (en) * 1979-12-28 1982-01-05 Gte Products Corporation Method of making a mercury dispenser, getter and shield assembly for a fluorescent lamp
IT1227338B (it) * 1988-09-12 1991-04-08 Getters Spa Nastro getter atto ad emettere vapori di mercurio, utilizzabile nella formazione di catodi freddi per lampade fluorescenti.
US5256935A (en) * 1990-08-30 1993-10-26 Toshiba Lighting & Technology Corporation Low pressure mercury vapor discharge lamp having cold cathode
JPH04149954A (ja) * 1990-10-15 1992-05-22 Erebamu:Kk 放電灯
JP3205075B2 (ja) * 1992-07-27 2001-09-04 東芝ライテック株式会社 低圧水銀蒸気放電灯

Non-Patent Citations (1)

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Title
See references of WO9814983A1 *

Also Published As

Publication number Publication date
EP0888634B1 (fr) 2002-02-13
KR19990071753A (ko) 1999-09-27
HUP9901384A3 (en) 2000-09-28
BR9706769A (pt) 1999-07-20
CA2238927C (fr) 2004-09-14
CZ38998A3 (cs) 1998-07-15
SK284606B6 (sk) 2005-07-01
AU729283B2 (en) 2001-02-01
IN192589B (fr) 2004-05-08
JPH11500865A (ja) 1999-01-19
CA2238927A1 (fr) 1998-04-09
HUP9901384A2 (hu) 1999-08-30
DE59706387D1 (de) 2002-03-21
US6043603A (en) 2000-03-28
SK18198A3 (en) 1998-10-07
AU3537497A (en) 1998-04-24
CZ294861B6 (cs) 2005-04-13
KR100371018B1 (ko) 2003-06-18
HU220820B1 (hu) 2002-05-28
WO1998014983A1 (fr) 1998-04-09
DE29616879U1 (de) 1998-01-29
MX9804212A (es) 1998-10-31
CN1199501A (zh) 1998-11-18
CN1118856C (zh) 2003-08-20

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