EP1104006A2 - Flache Lampe - Google Patents

Flache Lampe Download PDF

Info

Publication number
EP1104006A2
EP1104006A2 EP00204005A EP00204005A EP1104006A2 EP 1104006 A2 EP1104006 A2 EP 1104006A2 EP 00204005 A EP00204005 A EP 00204005A EP 00204005 A EP00204005 A EP 00204005A EP 1104006 A2 EP1104006 A2 EP 1104006A2
Authority
EP
European Patent Office
Prior art keywords
bulb
envelope
radiation source
radiation
bulb 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Withdrawn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
EP00204005A
Other languages
English (en)
French (fr)
Other versions
EP1104006A3 (de
Inventor
Michel Morel
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.)
Koninklijke Philips NV
Original Assignee
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP1104006A2 publication Critical patent/EP1104006A2/de
Publication of EP1104006A3 publication Critical patent/EP1104006A3/de
Withdrawn legal-status Critical Current

Links

Images

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
    • H01J61/305—Flat vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K7/00—Lamps for purposes other than general lighting

Definitions

  • the present invention relates to a bulb intended to emit radiation through an emission surface of an envelope containing a source of radiation.
  • the envelope has the shape of a cylinder of revolution, the radiation source being constituted by a filament or a cylinder of small diameter disposed on the axis of revolution of the envelope.
  • a bulb is known from French patent No. 1,270,856.
  • the radiation emitted by a bulb of this type is in the form of cylindrical heat waves whose axis is that of the envelope.
  • the distribution of the heat received by said surface is inhomogeneous, the places of the receiving surface closer to the axis of the envelope being subjected to a more intense heat than the places of the receiving surface which are the most distant from said axis.
  • the present invention aims to remedy these drawbacks by proposing a bulb capable of emitting homogeneous radiation towards a flat surface with a high radiation density.
  • the emission surface is substantially planar and the radiation source defines a planar surface substantially parallel to the emission surface.
  • the flatness of the emitting surface and of the radiation source allows the bulb according to the invention to generate radiation in the form of plane heat waves allowing homogeneous heating of a plane receiving surface, as long as it is arranged parallel to the emission surface. Furthermore, the power surface density of the radiation emitted by the bulb according to the invention, and therefore the energy efficiency of the heating operations carried out using said bulb, will be directly a function of the ratio between the surface defined by the radiation source. and the emission surface, and can be adjusted during the design of the radiation source.
  • the radiation source consists of at least one filament of flattened shape.
  • the source of radiation consists of a plurality of coplanar filaments.
  • the source of radiation consists of at least one convoluted filament.
  • the radiation source is consisting of a reactive gas intended to be excited by means of electrodes.
  • the envelope has a reflecting surface arranged opposite the emission surface.
  • the reflective surface increases the surface power density of the radiation emitted by the bulb, and therefore further increase the energy efficiency of heating operations carried out by means of said bulb.
  • the present envelope arranged opposite from the emission surface, a surface curved towards the outside of the envelope.
  • Such convexity of the surface disposed opposite the emission surface will facilitate positioning of the bulb in a cavity formed within a lamp intended to accommodate the bulb.
  • part of the radiation emitted by the bulb will be concentrated towards the center of it, which will facilitate the construction of the radiation source in some embodiments.
  • FIG. 1 schematically shows a bulb according to a particular embodiment of the invention.
  • This bulb is intended to emit radiation through an emission surface ES of an envelope ENV containing a source of radiation LEM.
  • the envelope will advantageously be made of quartz or a special transparent glass for infrared and / or visible. If the contour of the emission surface ES is, in this example, circular, it is clear that any other shape, oval, rectangular, square, polygonal, etc., can be chosen according to the application for which the bulb is intended.
  • the emission surface ES is plane, and the radiation source LEM defines a plane surface parallel to the emission surface ES.
  • the LEM radiation source consists of a filament of flattened shape.
  • the outline of the surface defined by this flattened filament is rectangular in this example, so that it is more easily distinguishable from the other elements of the bulb. It is nevertheless understood that the power surface density of the radiation emitted by the bulb will be all the greater as the area defined by the radiation source LEM will be similar to the emission area ES. Thus, in the present case, where the contour of the emission surface ES is of circular shape, it will be more advantageous in practice to provide the contour of the flattened filament with a circular shape.
  • FIG. 2 illustrates another embodiment of the LEM radiation source, which is, in this example, constituted by N coplanar filaments W1 ... WN. These filaments form a grid whose outline has been chosen rectangular in this example, so that it is more easily differentiated from the other elements of the bulb. However, we understand that, as previously explained, it will be more advantageous in practice to provide the outline of this grid of circular shape in order to obtain a power surface density of the radiation emitted by the optimal bulb in the case where the contour of the emitting surface is, as shown here, circular in shape.
  • FIG. 3 illustrates another embodiment of the LEM radiation source, which is, in this example, constituted by two convoluted filaments Wl and W2.
  • the W1 and W2 filament convolutions are not very complex here, so that said filaments are identifiable in the figure. It is nevertheless understood that, to obtain an optimal surface power density, it will be necessary to create convolutions such that a large proportion of the points constituting the ES emission surface is directly above a portion of one of the convoluted filaments. A departure from this principle may however, it must be obtained if the surface facing the ES emission surface is curved towards the outside of the envelope ENV and covered with a reflective layer, in which case a part of the reflected radiation will be concentrated towards the center of the ES emission surface. This will reduce the density of filament convolutions near the center of the ES emission surface, and therefore to facilitate the construction of the EM radiation source, without compromising the homogeneity of the radiation emitted by the bulb.
  • FIG. 4 illustrates a preferred embodiment of the LEM radiation source, which is, in this example, constituted by a reactive gas, represented in gray form, intended to be excited by means of electrodes El + and El-.
  • the gas used may for example be Xenon.
  • This embodiment is particularly advantageous in that, the distribution of the gas being isotropic within the envelope ENV, the radiation emitted by the bulb is by nature homogeneous over the entire emission surface ES. Provision may be made to cover the surface located opposite the emission surface ES with a reflective layer to improve uniformity and increase the power density of the radiation emitted by the bulb.
  • FIG. 5 is a sectional view of a bulb according to a variant of the invention.
  • the envelope ENV has a BOT bottom, arranged opposite the surface of ES emission.
  • the LEM radiation source for example a flattened filament or a plurality coplanar filaments, made of tungsten, or any other radiant material, is arranged on the bottom BOT.
  • the thickness of this LEM radiation source has been intentionally exaggerated so that it is clearly visible in the figure.
  • the LEM radiation source consists of a material intended to be heated to incandescent
  • the ENV envelope will advantageously be filled with an inert gas before sealing.
  • a REF layer of reflective material for example based on ceramic, has been deposited on the surface of the bottom BOT, outside the envelope ENV, in order to increase the power density of the radiation emitted by the bulb.
  • Figure 6 is a sectional view of a bulb according to another variant of the invention.
  • the bottom BOT is curved towards the outside of the bulb.
  • Source LEM radiation is constituted in this example by a plurality of convoluted filaments, with hatched sections appearing in the section plane. Some of these sections do not have a circular outline because, as can be deduced from Figure 3, some portions of filaments may not be perpendicular to the cutting plane.
  • the radiation source LEM rests on the BOT bottom via a plurality of P1 ... PN stilts which can also be made of tungsten, or any other radiant material.
  • a REF layer of material reflective for example ceramic-based, has been deposited on the surface of the BOT bottom, outside the envelope ENV, in order to increase the power density of the emitted radiation by the bulb and concentrate this density towards the center of the bulb. This limits the surface density of the convolutions of the filaments near the center of the surface ES emission, without compromising the homogeneity of the radiation emitted through said surface.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Resistance Heating (AREA)
  • Control Of Resistance Heating (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP00204005A 1999-11-23 2000-11-14 Flache Lampe Withdrawn EP1104006A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9914743 1999-11-23
FR9914743 1999-11-23

Publications (2)

Publication Number Publication Date
EP1104006A2 true EP1104006A2 (de) 2001-05-30
EP1104006A3 EP1104006A3 (de) 2001-10-04

Family

ID=9552453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00204005A Withdrawn EP1104006A3 (de) 1999-11-23 2000-11-14 Flache Lampe

Country Status (4)

Country Link
US (1) US6608442B1 (de)
EP (1) EP1104006A3 (de)
JP (1) JP2001210451A (de)
CN (1) CN1297250A (de)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1270856A (fr) 1960-09-21 1961-09-01 Philips Nv Radiateur électrique
GB1342069A (en) * 1970-12-15 1973-12-25 Thorn Electrical Ind Ltd Electrically conductive components
US4585971A (en) * 1984-12-18 1986-04-29 Clegg John E Flat circular foil-filament lamp
GB2248141A (en) * 1990-09-18 1992-03-25 Servomex Infra-red source
US5500574A (en) * 1994-09-28 1996-03-19 Matsushita Electric Works R&D Laboratory, Inc. Inductively coupled substantially flat fluorescent light source
DE4438870B4 (de) * 1994-11-03 2004-11-11 Heraeus Noblelight Gmbh Infrarotstrahler mit langgestrecktem Widerstandskörper als Strahlenquelle
FR2748810A1 (fr) * 1996-09-30 1997-11-21 Commissariat Energie Atomique Source de rayonnement infrarouge miniaturisee
DE19711893A1 (de) * 1997-03-21 1998-09-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Flachstrahler
US5977707A (en) * 1997-06-13 1999-11-02 Koenig; Erl A. Lamp filament and lamp filament assembly
US6127780A (en) * 1998-02-02 2000-10-03 Winsor Corporation Wide illumination range photoluminescent lamp
US6114809A (en) * 1998-02-02 2000-09-05 Winsor Corporation Planar fluorescent lamp with starter and heater circuit
WO1999045557A1 (en) * 1998-03-05 1999-09-10 Corning Incorporated Channeled glass article and method therefor

Also Published As

Publication number Publication date
CN1297250A (zh) 2001-05-30
US6608442B1 (en) 2003-08-19
EP1104006A3 (de) 2001-10-04
JP2001210451A (ja) 2001-08-03

Similar Documents

Publication Publication Date Title
EP3286491B1 (de) Beleuchtungsvorrichtung mit led-filamenten
FR2853395A1 (fr) Phare pour vehicule et element photoemissif a semi- conducteur pour phare de vehicule
EP0457645B1 (de) Beleuchtungsvorrichtung
FR2606125A1 (fr) Projecteur perfectionne pour vehicule automobile
FR2711014A1 (fr) Lampe à quartz à deux extrémités et procédé de fabrication de cette lampe.
FR2847759A1 (fr) Systeme de chauffage
FR2607904A1 (fr) Appareil d'eclairage muni d'un reflecteur a facettes
EP4134586B1 (de) Beleuchtungsvorrichtung zur abbildung einer virtuellen beleuchteten oberfläche eines kollektors
FR2512273A1 (fr) Lampe a vapeur de metal alcalin haute pression
FR3053657A1 (fr) Ballon dirigeable equipe d'un generateur solaire compact a concentration locale utilisant des lignes de cellules solaires bifaciales
FR2504313A1 (fr) Lampe reflectrice electrique
FR3015002A1 (fr) Dispositif d'eclairage
EP1104006A2 (de) Flache Lampe
FR2496841A1 (fr) Lampe a reflecteur et optique profiles
FR3061537B1 (fr) Module d'emission lumineuse a nappe de guidage ameliore
FR2954458A1 (fr) Lampe de type hublot
FR2588355A1 (fr) Eclairage photographique
FR2489040A1 (fr) Lampe electrique avec ampoule de forme ellipsoidale
EP1046187B1 (de) Röhre, vorrichtung und verfahren zur emission elektromagnetischer strahlung
FR2513809A1 (fr) Lampe a decharge a haute intensite
FR3097718A1 (fr) Dispositif de chauffage radiant pour plants végétaux
EP1083772B1 (de) Antenne für Mikrowellenofen
FR2872673A3 (fr) Radiateur infrarouge a eclairement uniforme
EP1196970B1 (de) Verfahren zum optischen pumpen eines lichtverstärkenden mediums und modul zur durchführung des verfahrens
BE892845A (fr) Lampe reflectrice electrique

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

Kind code of ref document: A2

Designated state(s): DE FR GB

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20020404

AKX Designation fees paid

Free format text: DE FR GB

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20031013