EP0276888A2 - Lampe à décharge à gaz - Google Patents

Lampe à décharge à gaz Download PDF

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Publication number
EP0276888A2
EP0276888A2 EP88200094A EP88200094A EP0276888A2 EP 0276888 A2 EP0276888 A2 EP 0276888A2 EP 88200094 A EP88200094 A EP 88200094A EP 88200094 A EP88200094 A EP 88200094A EP 0276888 A2 EP0276888 A2 EP 0276888A2
Authority
EP
European Patent Office
Prior art keywords
discharge vessel
envelope
airgel
lamp
lamp according
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Withdrawn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
EP88200094A
Other languages
German (de)
English (en)
Other versions
EP0276888A3 (fr
Inventor
Ernst Dr. Fischer
Horst Dr. Hörster
Reinhard Dr. Kersten
Joseph Gijsbertus Van Lierop
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0276888A2 publication Critical patent/EP0276888A2/fr
Publication of EP0276888A3 publication Critical patent/EP0276888A3/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Withdrawn legal-status Critical Current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
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • 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
    • H01J61/34—Double-wall vessels or containers

Definitions

  • the invention relates to a gas discharge lamp with a discharge vessel containing an ionizable gas filling and made of translucent material, which is surrounded at a distance by a translucent outer envelope, the discharge vessel having a heat-insulating, porous, translucent envelope within the outer envelope.
  • Gas discharge lamps especially high pressure gas discharge lamps, have a discharge vessel made of translucent and heat-resistant material, e.g. made of quartz glass or sintered aluminum oxide. Common gas fillings of such lamps contain e.g. Sodium and / or mercury, optionally with additions of metal halides to improve color rendering.
  • a single or double-walled quartz glass tube US Pat. Nos. 29 72 693 and 32 50 934. To further reduce heat dissipation, the space between the discharge vessel and the outer bulb has been evacuated. In many cases, especially with low power gas discharge lamps, e.g. less than 70 W, the thermal insulation of the discharge tube by external quartz glass tubes is not sufficient, since the distance between the discharge tube and the outer shell is too small.
  • a gas discharge lamp of the type mentioned is known, the covering being made of glass wool.
  • Such an envelope causes a strong scattering of the light emanating from the discharge vessel, which makes it difficult to focus it.
  • a covering may only have a relatively loose packing, but this limits the thermal insulation.
  • the invention has for its object to provide a gas discharge lamp with a sheath, which brings about good thermal insulation of the discharge vessel, but at the same time either not at all or only slightly influences the emitted light.
  • the envelope is a microporous airgel which at least partially encloses the discharge vessel.
  • Such a microporous airgel consists of a cross-linked and open-pored solid structure of low density (less than 10% of the density of a solid body made of the material). All cavities between the solid particles have transverse diameters that are smaller than the light wavelength and e.g. between 0.03 and 0.2 ⁇ m, preferably between 0.04 and 0.07 ⁇ m. An airgel of this type therefore causes only a very slight scattering of the light.
  • the envelope of the discharge vessel can e.g. consist of silicon dioxide airgel or aluminum oxide airgel.
  • Such aerogels are particularly heat-resistant. Their light absorption is negligible.
  • thermal insulation brought about by these aerogels reduces the thermal radiation of the discharge vessel in such a way that the connected load of the lamp can be reduced, or for a given one, if the vessel dimensions are still technically manageable Performance can be used on larger vessel dimensions, which enables easier production.
  • the envelope is a coherent mass which tightly surrounds the discharge vessel.
  • the discharge vessel can be encapsulated with the airgel.
  • a covering offers excellent protection against explosion of the discharge vessel.
  • the temperature distribution on the discharge vessel becomes more uniform. This has a beneficial influence on a number of lamp properties, e.g. stable color rendering, positional independence of the lamp and mechanical strength by lowering peak temperatures and thus reducing the tendency to recrystallization of the discharge vessel.
  • the space between the discharge vessel and the outer envelope can be completely filled with airgel.
  • the envelope can consist of airgel particles or of a coherent mass. Such a mass is advantageous because light scatter at the boundary from the airgel and the outer shell is reduced.
  • the discharge vessel is at least partially covered with a molded body made of airgel that is adapted to its outer shape, this molded body can be produced separately and placed on the discharge vessel during lamp assembly.
  • the sheathing can be in two parts and envelop the discharge vessel only in the area of the lamp electrodes. It has been found that such a covering surrounding only the lamp electrodes can be sufficient as thermal insulation.
  • the sheathing of the discharge vessel with an airgel reduces the requirements for a vacuum between the discharge vessel and the outer sheath and for the heat resistance of the outer sheath, so that, according to a development according to the invention, the latter can be made of plastic.
  • the outer shell is designed as a reflector, i.e. the outer shell is provided with a reflective layer on its outside or inside.
  • the gas discharge lamp can be used as a lamp.
  • the lamp according to the invention can be a high-pressure gas discharge lamp, but also a low-pressure sodium vapor discharge lamp.
  • the high-pressure metal halide discharge lamp according to FIG. 1 has a discharge vessel 1 made of quartz glass, in which an ionizable gas filling and two electrodes 2 are accommodated, the connecting wires 3 of which are welded to intermediate pieces 4, which in turn are connected to strong pole wires 5, which are connected to a lamp base 6 are connected.
  • the discharge vessel 1 is surrounded at a distance by a glass outer shell 7.
  • the discharge vessel 1 is inside the outer envelope 7 with a porous, translucent envelope 8 made of an airgel, e.g. Silicon dioxide airgel. In this case, the discharge vessel 1 is completely encapsulated with the airgel 8.
  • an airgel e.g. Silicon dioxide airgel.
  • the low-pressure sodium vapor discharge lamp shown in FIG. 2 has a U-shaped discharge vessel 9, which has an ionizable gas filling and is provided with lateral bulges 10 for receiving sodium. At the ends of the U-shaped discharge vessel 9 there are electrodes 11, the connections of which are connected to a lamp base 12.
  • the discharge vessel 9 is surrounded by a glass outer shell 13 at a distance.
  • the space between the discharge vessel 9 and the outer envelope 13 is covered with microporous, spherical airgel particles 14 filled, which form a translucent envelope of the discharge vessel 9.
  • the high-pressure sodium vapor discharge lamp according to FIG. 3 has a tubular discharge vessel 15 made of translucent aluminum oxide.
  • the ends of the discharge vessel 15 are closed with ceramic plugs 16, in which current supply wires 17 to electrodes 18 are received.
  • Shaped bodies 19 made of airgel, in particular aluminum oxide airgel, are placed on the ends of the discharge vessel 15 and envelop the discharge vessel 15 only in the area of the lamp electrodes 18.
  • the high-pressure metal halide discharge lamp according to FIG. 4 designed as a radiator, has a discharge vessel 20 which is accommodated in an outer envelope 21 made of glass or plastic.
  • the lamp structure essentially corresponds to the lamp according to FIG. 1.
  • the outer envelope 21 has a parabolic shape and is covered on the inside with a reflection layer 22.
  • the space between the discharge vessel 20 and the outer envelope 21 is completely filled with airgel 23.
  • the operating conditions of the lamps described are largely independent of the gas pressure in the outer envelope.
  • the otherwise usual geometrical position dependence of the color temperature is significantly reduced; for example, 1, the difference in color temperature between the vertical and horizontal position of the discharge from 700 to 200 K.
  • the aerogels made of silicon dioxide or aluminum oxide are UV-resistant.
  • the described airgel envelopes of the discharge vessels show no noticeable absorption of the emitted radiation in the visible spectral range. These airgel casings are heat-resistant up to approximately 1000 ° C.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
EP88200094A 1987-01-28 1988-01-20 Lampe à décharge à gaz Withdrawn EP0276888A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3702481 1987-01-28
DE19873702481 DE3702481A1 (de) 1987-01-28 1987-01-28 Gasentladungslampe

Publications (2)

Publication Number Publication Date
EP0276888A2 true EP0276888A2 (fr) 1988-08-03
EP0276888A3 EP0276888A3 (fr) 1990-05-02

Family

ID=6319700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88200094A Withdrawn EP0276888A3 (fr) 1987-01-28 1988-01-20 Lampe à décharge à gaz

Country Status (6)

Country Link
US (1) US4866327A (fr)
EP (1) EP0276888A3 (fr)
JP (1) JPS63193456A (fr)
CN (1) CN1010355B (fr)
DE (1) DE3702481A1 (fr)
HU (1) HU196862B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363991A3 (fr) * 1988-10-14 1991-05-08 Gte Products Corporation Assemblage de lampe aux halogénures métalliques
EP0840353A3 (fr) * 1996-10-31 1998-06-17 Toshiba Lighting & Technology Corporation Lampe à décharge à basse pression de vapeur de mercure, luminaire et dispositif d'affichage
EP1371899A4 (fr) * 2001-03-19 2007-04-18 Fujitsu Ltd Appareil d' clairage et afficheur

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230814A1 (de) * 1992-09-15 1994-03-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe
DE4230815A1 (de) * 1992-09-15 1994-03-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe und Herstellungsverfahren für eine Hochdruckentladungslampe
US5949180A (en) * 1996-12-20 1999-09-07 Fusion Lighting, Inc. Lamp apparatus with reflective ceramic sleeve holding a plasma that emits light
US6833675B2 (en) * 1998-05-12 2004-12-21 Musco Corporation Method and apparatus of blocking ultraviolet radiation from arc tubes
DE10223154A1 (de) * 2002-05-16 2003-11-27 Newfrey Llc Fügesystemkopf, Fügesystem und Verfahren zum Zuführen und Fügen von Elementen
JP2004031153A (ja) * 2002-06-26 2004-01-29 Matsushita Electric Ind Co Ltd 高圧水銀ランプおよびランプユニット
EP2041772B1 (fr) * 2006-07-07 2018-12-19 Lumileds Holding B.V. Lampe à décharge gazeuse

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL34272C (fr) * 1931-11-06
GB481320A (en) * 1936-01-09 1938-03-09 Elektrod Ab Improvements in or relating to discharge tubes or other electrical sources of radiation of light
US2159824A (en) * 1936-12-01 1939-05-23 Hans J Spanner Discharge device
US2596697A (en) * 1947-12-08 1952-05-13 Krefft Hermann Eduard Electrical discharge lamp
BE545648A (fr) * 1955-03-03 1900-01-01
US2972693A (en) * 1959-02-25 1961-02-21 Westinghouse Electric Corp Discharge device
US3234421A (en) * 1961-01-23 1966-02-08 Gen Electric Metallic halide electric discharge lamps
US3250934A (en) * 1963-11-22 1966-05-10 Sylvania Electric Prod Electric discharge device having heat conserving shields and sleeve
US3333132A (en) * 1964-05-19 1967-07-25 Westinghouse Electric Corp Discharge lamp having heat reflecting shields surrounding its electrodes
US3434912A (en) * 1965-11-22 1969-03-25 Standard Oil Co Self-sustaining,thin,crack-free sheet of inorganic aerogel
CH592270A5 (fr) * 1975-05-09 1977-10-14 Sutter Aldo
US4074165A (en) * 1975-05-23 1978-02-14 Moriyama Sangyo Kabushiki Kaisha Decorative light source including a discharge lamp and resistor within an outer envelope
GB1580909A (en) * 1977-02-10 1980-12-10 Micropore Internatioonal Ltd Thermal insulation material
DE7831005U1 (de) * 1978-10-18 1979-02-08 Fa. Martin Hamacher, 4352 Herten Leuchte
SE422045C (sv) * 1979-04-30 1985-03-18 Guy Von Dardel Sett att framstella silikaaerogel i form av ett vesentligen sprickfritt, foretredesvis transparent block samt anvendning av detsamma i solpaneler
HU181262B (en) * 1981-01-13 1983-06-28 Egyesuelt Izzolampa Sodium vapour lamp of high pressure
US4469980A (en) * 1981-12-21 1984-09-04 General Electric Company Fluorescent lamp with non-scattering phosphor
US4591752A (en) * 1983-10-14 1986-05-27 Duro-Test Corporation Incandescent lamp with high pressure rare gas filled tungsten-halogen element and transparent thick walled safety envelope

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363991A3 (fr) * 1988-10-14 1991-05-08 Gte Products Corporation Assemblage de lampe aux halogénures métalliques
EP0840353A3 (fr) * 1996-10-31 1998-06-17 Toshiba Lighting & Technology Corporation Lampe à décharge à basse pression de vapeur de mercure, luminaire et dispositif d'affichage
EP1371899A4 (fr) * 2001-03-19 2007-04-18 Fujitsu Ltd Appareil d' clairage et afficheur
US7290901B2 (en) 2001-03-19 2007-11-06 Fujitsu Limited Light source device, and display device, display module, information handling apparatus and portable information handling apparatus comprising same
US7290899B2 (en) 2001-03-19 2007-11-06 Fujitsu Limited Light source device and display device
US7396144B2 (en) 2001-03-19 2008-07-08 Fujitsu Limited Light source device and display device
EP1956637A3 (fr) * 2001-03-19 2008-09-03 Fujitsu Limited Appareil d' eclairage et afficheur
EP1956636A3 (fr) * 2001-03-19 2008-09-10 Fujitsu Limited Appareil d'eclairage et afficheur
US7470040B2 (en) 2001-03-19 2008-12-30 Fujitsu Limited Light source device and display device
US7470039B2 (en) 2001-03-19 2008-12-30 Fujitsu Limited Light source device and display device
US7513649B2 (en) 2001-03-19 2009-04-07 Fujitsu Limited Light source device and display device
US7513650B2 (en) 2001-03-19 2009-04-07 Fujitsu Limited Light source device and display device
US7549768B2 (en) 2001-03-19 2009-06-23 Fujitsu Limited Display device, including discharge tube temperature control member
US7654698B2 (en) 2001-03-19 2010-02-02 Fujitsu Limited Light source device and display device

Also Published As

Publication number Publication date
JPS63193456A (ja) 1988-08-10
CN88100435A (zh) 1988-08-10
EP0276888A3 (fr) 1990-05-02
CN1010355B (zh) 1990-11-07
DE3702481A1 (de) 1988-08-11
HU196862B (en) 1989-01-30
HUT45794A (en) 1988-08-29
US4866327A (en) 1989-09-12

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