EP2981984B1 - Luminaire - Google Patents

Luminaire Download PDF

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Publication number
EP2981984B1
EP2981984B1 EP14716755.5A EP14716755A EP2981984B1 EP 2981984 B1 EP2981984 B1 EP 2981984B1 EP 14716755 A EP14716755 A EP 14716755A EP 2981984 B1 EP2981984 B1 EP 2981984B1
Authority
EP
European Patent Office
Prior art keywords
light
labyrinth
light exit
lamp according
exit opening
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.)
Not-in-force
Application number
EP14716755.5A
Other languages
German (de)
English (en)
Other versions
EP2981984A1 (fr
Inventor
Jens Burmeister
Gerhard Schwarz
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.)
Eaton Protection Systems IP GmbH and Co KG
Original Assignee
Eaton Protection Systems IP GmbH and Co KG
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 Eaton Protection Systems IP GmbH and Co KG filed Critical Eaton Protection Systems IP GmbH and Co KG
Publication of EP2981984A1 publication Critical patent/EP2981984A1/fr
Application granted granted Critical
Publication of EP2981984B1 publication Critical patent/EP2981984B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
    • H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
    • H01J65/044—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by a separate microwave unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • 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 lamp with a stimulable by microwaves light source and a surrounding housing, which has at least one light exit opening.
  • a lamp is also referred to as a microwave lamp and corresponds to a particular form of a gas discharge lamp.
  • the corresponding energy supply for exciting the phosphor is in the form of microwave radiation.
  • Such a luminaire usually comprises a quartz bulb, in which a noble gas is filled at low pressure.
  • the quartz bulb is coated with metal halide salts.
  • the corresponding microwave radiation is provided by a microwave generator or magnetron and generates a plasma by ionizing the corresponding inert gas filling. This plasma leads to evaporation of the corresponding metal-halide salt and through both together there is a corresponding light emission. Furthermore, influence on the emitted light spectrum by doping the coating are possible.
  • the invention has for its object to dispense with appropriate light guide or the like and to be able to decouple light from a corresponding luminaire housing cost and easily.
  • the corresponding Lichtaus- outlet opening of the lamp housing is assigned as a microwave shielding a labyrinth structure, which labyrinth structure is formed as a labyrinth plate with a plurality of extending obliquely to the light exit direction labyrinth passages.
  • a lattice or labyrinth structure in front of the light exit opening prevents that, apart from the desired light, no other radiation leaves the luminaire housing.
  • the luminaire housing is made of a metal manufactured, so that a corresponding microwave shield is only to be additionally arranged in the region of the light exit opening.
  • microwave shielding no additional coupling for light from the lamp housing is necessary.
  • conventional devices can be used within the luminaire housing for light deflection and deflection in the direction of the light exit opening, wherein only in the region of the light exit opening a corresponding shielding against microwave radiation takes place, in particular with regard to EMC.
  • a corresponding grid or labyrinth structure is easy to arrange and inexpensive to produce.
  • an adaptation to the shape and size of the light exit opening can be carried out in a simple manner.
  • the light exit opening of a corresponding lamp housing is closed by a light-transparent cover, such as a glass or quartz plate.
  • a light-transparent cover such as a glass or quartz plate.
  • Lattice and labyrinth structure impede only slightly or not at all a corresponding passage of the light radiation, while, however, given a secure microwave shielding.
  • this is formed from a perforated grid plate, in particular metal grid plate.
  • a perforated grid plate in particular metal grid plate.
  • the grid plate may have a row and column arrangement of holes.
  • the shape and size of the holes varies in accordance with the row or column direction. In a simple example, however, it is also possible that all holes have the same shape and the same diameter and are in particular circular holes.
  • a microwave radiation of approximately 2.45 GHz is used, which can generate a plasma between the associated microwave antennas.
  • the hole size should be much smaller than the corresponding wavelength of the radiation. That is, the hole diameter would be a lot smaller than 12 cm, which corresponds to a wavelength of the microwave radiation of 2.45 GHz.
  • a corresponding grid plate with such a hole structure it is furthermore designed as an edge filter or blocking filter, so that shielding is ensured for longer wavelengths, in particular in the area of the microwave radiation used.
  • the labyrinth structure according to the invention is designed as a labyrinth plate, in particular metal plate, with a multiplicity of labyrinth passages running at an angle to the light exit direction.
  • the walls of the labyrinth passages may be reflective of light radiation so that they can exit through the labyrinth passages in the direction of the light exit opening.
  • the labyrinth passages are formed corresponding to the holes with a corresponding diameter which prevents passage of microwave radiation.
  • the labyrinth passages may have a length which varies outwardly from a central central axis and in particular increases in length.
  • the central central axis is an axis of symmetry for the labyrinth passages, i. H. that the labyrinth plate is formed symmetrically with corresponding labyrinth passages above and below this symmetry axis.
  • the rest of the construction of the luminaire or of the luminaire housing can take place as with other gas discharge lamps.
  • the light source can be assigned a light reflection device for deflecting light radiation emitted by the light source substantially in the direction of the light exit opening.
  • Such a light reflection device may be formed as a parabolic mirror or the like.
  • a simple assignment of the lattice or labyrinth plate to the light exit opening may result if grid or labyrinth plate is arranged on a rear side of the light-transparent cover facing the light source.
  • lattice and labyrinth plate are arranged interchangeable, not only an exchange of each grid plates and labyrinth plates can be done with each other, but also an exchange of a grid plate against a labyrinth plate and vice versa can take place.
  • FIG. 1 a longitudinal section through a first of a lamp 1 is shown.
  • This has a rectangular-shaped housing 4 in principle. This is shown only as an example and other forms of the lamp housing are also possible.
  • a microwave generator 3 is arranged in the form of a magnetron. This feeds microwave energy to corresponding antennas which are arranged inside a light source 2 with a corresponding quartz bulb or the like.
  • a plasma of a corresponding noble gas is generated by the microwave radiation between the antennas, resulting in evaporation of metal halide salt applied to the glass or quartz glass bulb leads and generated from the noble gas plasma and the metal halide salt vapor light in a corresponding spectral range.
  • the light source 2 is partially surrounded by a light reflection device 18 in the form of, for example, a parabolic mirror. This directs light emitted by the light source 2 in the direction of a light exit opening 5 of the luminaire housing 4.
  • the luminaire housing 4 is generally formed from a metal which represents a shield with respect to the microwave radiation.
  • the light exit opening 5 is associated with a grid structure 6, which forms a corresponding microwave shield in the region of the light exit opening.
  • the lattice structure 6 is arranged on a rear side 19 of a light-transparent cover 9 in the form of a glass or quartz plate 10.
  • Light transparent cover 9 and grid structure 6 are arranged in a detachable end portion 22 of the lamp housing 4.
  • the grating structure 6 is arranged in the light exit direction 20 in front of the light transparent cover 9, d. H. on whose in the direction of the light source 2 facing back 19th
  • the light exit opening is completely covered by the light transparent cover 9, wherein the corresponding grid structure 6 has analogous dimensions.
  • FIG. 1 exemplified two light beams 21, which correspond to the maximum exit angle of light radiation from the light exit opening 5 of the lamp housing 4 substantially.
  • the grid structure 6 is formed as a grid plate 11 with a plurality of holes 12. These are, see also the FIGS. 2 and 3 arranged in rows and columns and each have the same shapes and the same diameter.
  • the diameter of the corresponding holes 12 is considerably smaller compared to the wavelength of the microwave radiation, for example, a microwave radiation of 2.45 GHz with a wavelength of about 12 cm is usable.
  • the corresponding holes 12 only slightly obstruct an exit of the light beams 21, while the grating structure 6 forms a safe microwave shielding for the microwave radiation.
  • the grid plate 11 is formed from a simple to produce and inexpensive perforated metal plate, in a simple manner to appropriate sizes of the light exit opening or the light transparent cover 9 is customizable.
  • Corresponding grid plates 11, as well as the further below-mentioned labyrinth plates 13 are not only in the substantially square shape to FIGS. 2, 3 . 5 and 6 but can be produced in the form of virtually any light exit opening with a corresponding light-transparent cover 9.
  • the grid structure 6 in the form of the grid plate 11 is shown in front view and in an oblique view from the front.
  • the columns and rows arrangement of the corresponding holes 12 can be seen.
  • the corresponding holes 12 may be formed only partially, see FIG. 2 the holes along the upper and lower edges of the grid plate eleventh
  • FIG. 3 is the grid plate after FIG. 2 shown in an oblique view from the front. Again, the columns and rows arrangement and the partial formation of holes 12 along upper edges of the corresponding grid plate can be seen.
  • FIG. 4 an embodiment of a lamp 1 according to the invention is shown.
  • the microwave generator 3 is not shown for simplicity.
  • the structure of the corresponding lamp 1 corresponds to the FIG. 1 except for the use of a labyrinth structure 7 as a microwave shield instead of the grid structure 6.
  • a labyrinth structure 7 as a microwave shield instead of the grid structure 6.
  • FIG. 4 a plurality of light beams 21 are shown, which pass through the labyrinth structure 7 in the form of a labyrinth plate 13.
  • the labyrinth plate 13 has a plurality of labyrinth passages 14. These run obliquely outward relative to the light exit direction 20.
  • the labyrinth plate 13 is disposed on the corresponding rear side 19 of the light transparent cover 9, which covers the light exit opening 5 of the lamp housing.
  • the corresponding labyrinth passages 14 have on the exit side of the labyrinth plate 13 has an approximately rectangular cross-section, see FIG. 5 while extending in the direction of the light source 2 obliquely inward toward a central axis 15.
  • the length of the corresponding labyrinth passages 14 increases from the central axis 15 to the outside, see the exemplified length 16 in FIG. 4 .
  • the labyrinth plate 13 is symmetrical with corresponding labyrinth passages 14 formed to a running through the central axis 15 as the axis of symmetry 17 horizontal plane, see FIGS. 4 to 6 , D.
  • the corresponding inner sides of the labyrinth passages 14 can be designed to be reflective for light rays, so that they do not constitute an obstacle to the exit of the light rays 21 from the light exit opening 5 substantially.
  • the size and shape of the labyrinth passages 14 and in particular their inlet openings, which assign the light source 2, are substantially analogous to the size and diameter of the holes 12 after FIGS. 1 to 3 educated.
  • FIGS. 5 and 6 is analogous to the FIGS. 2 and 3 a front view and a perspective view obliquely from the front of the corresponding labyrinth plate 13 is shown.
  • the corresponding labyrinth passages 14 are arranged in rows and columns directly adjacent to one another.
  • the corresponding labyrinth plate 13 with its labyrinth passages 14 is also formed of a metal having corresponding microwave shielding properties.
  • the result is a safe, simple and cost-effective microwave shielding by directly the light exit opening or the light transparent cover 9 of the light exit opening 5 associated grating structure 6 and a labyrinth structure according to the invention 7.
  • the corresponding openings in these structures are each formed sufficiently small to escape the exit Prevent microwave radiation.
  • the perforated grid plate 11 also forms a barrier filter at the same time
  • the corresponding labyrinth plate 13 can also be regarded as a resonant seal. That is, the corresponding labyrinth passages essentially form rectangular waveguides that are sufficiently small compared to the wavelength of the microwave radiation to prevent corresponding wave propagation along the labyrinth passages.
  • the corresponding cut-off wavelength should be sufficiently small compared to the wavelength of the microwave radiation to be shielded.

Claims (8)

  1. Luminaire (1) comprenant une source lumineuse (2) pouvant être excitée par des micro-ondes pour l'émission de lumière, et un boitier (4) qui entoure cette source de lumière et présente au moins une ouverture de sortie de lumière (5), caractérisé en ce qu'à l'ouverture de sortie de lumière (5) est associée une structure de labyrinthe (7) en guise d'écran de protection contre les micro-ondes, ladite structure de labyrinthe (7) étant réalisée sous forme de plaque de labyrinthe (13) avec un grand nombre de passages de labyrinthe (14) s'étendant de manière oblique par rapport à la direction de sortie de lumière (20).
  2. Luminaire selon la revendication 1, caractérisé en ce que la structure de labyrinthe (7) est agencée à l'intérieur (8) du boitier, en se référant à la direction de sortie de lumière (20), devant un couvercle de recouvrement (9) transparent à la lumière, notamment une plaque de verre ou de quartz (10).
  3. Luminaire selon la revendication 1 ou la revendication 2, caractérisé en ce que l'écran de protection contre les micro-ondes est réalisé sous la forme d'un filtre de blocage ou filtre à limite sélective.
  4. Luminaire selon l'une des revendications précédentes, caractérisé en ce que les passages de labyrinthe (14) présentent une longueur (16), qui varie, et notamment augmente vers l'extérieur à partir d'un axe central médian (15).
  5. Luminaire selon l'une des revendications précédentes, caractérisé en ce que l'axe central médian (15) est un axe de symétrie (17) pour les passages de labyrinthe (14).
  6. Luminaire selon l'une des revendications précédentes, caractérisé en ce qu'à la source de lumière (2) est associé un dispositif de réflexion de lumière (18) pour dévier des rayons lumineux délivrés par la source de lumière, essentiellement en direction de l'ouverture de sortie de lumière (5).
  7. Luminaire selon l'une des revendications précédentes, caractérisé en ce que la plaque de labyrinthe (11, 13) est agencée sur un côté arrière (19) dirigé vers la source de lumière (2), du couvercle de recouvrement (9) transparent à la lumière.
  8. Luminaire selon l'une des revendications précédentes, caractérisé en ce que les plaques de labyrinthe (11, 13) sont agencées de manière interchangeable.
EP14716755.5A 2013-04-05 2014-04-04 Luminaire Not-in-force EP2981984B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013005942.9A DE102013005942A1 (de) 2013-04-05 2013-04-05 Leuchte
PCT/EP2014/000904 WO2014161670A1 (fr) 2013-04-05 2014-04-04 Luminaire

Publications (2)

Publication Number Publication Date
EP2981984A1 EP2981984A1 (fr) 2016-02-10
EP2981984B1 true EP2981984B1 (fr) 2016-12-14

Family

ID=50478810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14716755.5A Not-in-force EP2981984B1 (fr) 2013-04-05 2014-04-04 Luminaire

Country Status (6)

Country Link
US (1) US9812314B2 (fr)
EP (1) EP2981984B1 (fr)
CN (1) CN105340056B (fr)
DE (1) DE102013005942A1 (fr)
TW (1) TWI570353B (fr)
WO (1) WO2014161670A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5591321B2 (ja) 2009-04-08 2014-09-17 コーニンクレッカ フィリップス エヌ ヴェ 符号化照明システムにおける効率的なアドレス割り当て
US20160245502A1 (en) * 2015-02-23 2016-08-25 Cambridge International Inc. Lighted architectural panel system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6621195B2 (en) * 2000-01-18 2003-09-16 Ushiodenki Kabushiki Kaisha Spot light-source device excited by electromagnetic energy

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Publication number Priority date Publication date Assignee Title
JPS56126250A (en) * 1980-03-10 1981-10-03 Mitsubishi Electric Corp Light source device of micro wave discharge
JPS61253762A (ja) * 1985-05-07 1986-11-11 Canon Inc 照明装置
US4933602A (en) * 1987-03-11 1990-06-12 Hitachi, Ltd. Apparatus for generating light by utilizing microwave
WO1998056213A1 (fr) * 1997-06-04 1998-12-10 Fusion Lighting, Inc. Procede et appareil relatifs a un ecran de lampe sans electrode
CN1350698A (zh) * 1999-05-12 2002-05-22 熔化照明股份有限公司 高亮度微波灯
AU2002239243A1 (en) * 2000-11-13 2002-06-03 Fusion Lighting, Inc. Sealed microwave lamp and light distribution system
KR100430006B1 (ko) * 2002-04-10 2004-05-03 엘지전자 주식회사 무전극 조명 시스템
EP1414058A3 (fr) * 2002-10-24 2006-02-15 Lg Electronics Inc. Système de lampe sans électrodes et ampoule pour celui-ci
KR20060129862A (ko) * 2005-06-13 2006-12-18 엘지전자 주식회사 경사 광투과공을 구비한 무전극 조명기기의 공진기
CN1979758A (zh) * 2005-12-05 2007-06-13 乐金电子(天津)电器有限公司 微波硫灯
JP2007194012A (ja) * 2006-01-18 2007-08-02 Seiko Epson Corp 光源装置およびプロジェクタ
JP5208907B2 (ja) * 2009-11-18 2013-06-12 株式会社環境科学 人工温泉装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6621195B2 (en) * 2000-01-18 2003-09-16 Ushiodenki Kabushiki Kaisha Spot light-source device excited by electromagnetic energy

Also Published As

Publication number Publication date
CN105340056A (zh) 2016-02-17
EP2981984A1 (fr) 2016-02-10
CN105340056B (zh) 2018-07-03
DE102013005942A1 (de) 2014-10-23
US9812314B2 (en) 2017-11-07
US20160027634A1 (en) 2016-01-28
TW201447169A (zh) 2014-12-16
WO2014161670A1 (fr) 2014-10-09
TWI570353B (zh) 2017-02-11

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