EP2981984A1 - Lamp - Google Patents
LampInfo
- Publication number
- EP2981984A1 EP2981984A1 EP14716755.5A EP14716755A EP2981984A1 EP 2981984 A1 EP2981984 A1 EP 2981984A1 EP 14716755 A EP14716755 A EP 14716755A EP 2981984 A1 EP2981984 A1 EP 2981984A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- labyrinth
- plate
- grid
- 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.)
- Granted
Links
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.
- 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 takes place in the form of microwave radiation.
- 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 by both together, a corresponding light emission takes place. 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 light outlet opening of the lamp housing is assigned as a microwave shielding a grid structure or labyrinth structure.
- the lamp housing is made of a metal, so that a corresponding microwave shield is only to be additionally arranged in the region of the light exit opening. By this 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 the light radiation only slightly or not at all, while a safe microwave shielding is provided.
- 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 embodiment, 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 can be formed 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 together, but also an exchange of a grid plate against a labyrinth plate and vice versa can take place.
- FIG. 1 shows a longitudinal section through an embodiment of a lamp according to the invention.
- Fig. 2 is a front view of a grid plate as a grid structure
- Fig. 3 is an oblique view of the grid structure of Figure 2; 4 shows a longitudinal section analogous to FIG. 1 through a second exemplary embodiment of the invention;
- Fig. 5 is a front view of a labyrinth plate as a labyrinth structure
- FIG. 6 is an oblique view of the labyrinth structure of Figure 5.
- FIG. 1 shows a longitudinal section through a first exemplary embodiment of a luminaire 1 according to the invention.
- 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 is generated between the antennas by the microwave radiation from a corresponding inert gas, which leads to an evaporation of metal deposited on the glass or quartz glass bulb.
- Halide salt 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 deflects 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 grid 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 the light source 2 facing rear side 19.
- the light exit opening is completely covered by the light transparent cover 9, wherein the corresponding grid structure 6 has analogous dimensions.
- FIG. 1 two light beams 21 are shown by way of example in FIG. 1, which correspond essentially to the maximum exit angle of light radiation from the light exit opening 5 of the light housing 4.
- the grid structure 6 is formed as a grid plate 1 1 with a plurality of holes 12. These are, see also Figures 2 and 3, arranged in rows and columns and each have the same shape 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, which in a simple manner to corresponding sizes of Lichtaustritts- Opening or the light transparent cover 9 is customizable.
- Corresponding grid plates 11, as well as the labyrinth plates 13 mentioned further below, can not only be produced in the substantially square shape according to FIGS. 2, 3, 5 and 6, but are in the form of virtually any light exit opening with 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 column-wise and rowwise arrangement of the corresponding holes 12 can be seen.
- the corresponding holes 12 may also be only partially formed, see in FIG. 2 the holes along the upper and lower edges of the grid plate 11.
- FIG 3 the grid plate of Figure 2 is 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 shows a second exemplary embodiment of a luminaire 1 according to the invention.
- the microwave generator 3 is not shown for simplicity.
- the structure of the corresponding lamp 1 corresponds to that of Figure 1 to the use of a labyrinth structure 7 as a microwave shield instead of the grid structure 6.
- FIG. 4 shows a plurality of light beams 21 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 an approximately rectangular cross-section on the exit side of the labyrinth plate 13, see FIG. 5, while they extend in the direction of the light source 2 obliquely inwards in the direction of a central axis 15.
- the length of the corresponding labyrinth passages 14 increases from the central axis 15 to the outside, see the exemplarily illustrated length 16 in FIG. 4.
- the labyrinth plate 13 with corresponding labyrinth passages 14 is symmetrical. 4 to 6.
- the labyrinth passages 14 in the upper region of the labyrinth plate 13 according to FIG. 4 obliquely upward in the direction of the light exit opening 5 and the corresponding labyrinth passages 14 in the lower part of the labyrinth plate 13 obliquely downward in the direction of the light exit opening 5.
- the corresponding inner sides of the labyrinth passages 14 can be designed to be reflective for light beams, so that they are essentially no obstacle to the exit of the light beams 21 from the. Represent light exit opening 5.
- Size and shape of the labyrinth passages 14 and in particular their inlet openings, which assign the light source 2 are substantially similar to the size and diameter of the holes 12 of Figures 1 to 3 formed.
- FIGS. 5 and 6 analogous to FIGS. 2 and 3, a front view and a perspective view obliquely from the front onto the corresponding labyrinth plate 13 are shown.
- the corresponding labyrinth passages 14 are arranged directly adjacent to one another in rows and columns.
- the corresponding labyrinth plate 13 with its labyrinth passages 14 is likewise formed from a metal with corresponding microwave shielding properties.
- a secure, simple and cost-effective microwave shielding results from the lattice structure 6 or labyrinth structure 7 assigned directly to the light exit opening or the light-transparent cover 9 of the light exit opening 5.
- the corresponding openings in these structures are each made sufficiently small to prevent leakage of the 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.
- lattice structure 6 or labyrinth structure 7 are interchangeable with each other as well as against each other, so that, for example, a lattice structure could also replace a corresponding labyrinth structure.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013005942.9A DE102013005942A1 (en) | 2013-04-05 | 2013-04-05 | lamp |
PCT/EP2014/000904 WO2014161670A1 (en) | 2013-04-05 | 2014-04-04 | Lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2981984A1 true EP2981984A1 (en) | 2016-02-10 |
EP2981984B1 EP2981984B1 (en) | 2016-12-14 |
Family
ID=50478810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14716755.5A Not-in-force EP2981984B1 (en) | 2013-04-05 | 2014-04-04 | Lamp |
Country Status (6)
Country | Link |
---|---|
US (1) | US9812314B2 (en) |
EP (1) | EP2981984B1 (en) |
CN (1) | CN105340056B (en) |
DE (1) | DE102013005942A1 (en) |
TW (1) | TWI570353B (en) |
WO (1) | WO2014161670A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5591321B2 (en) | 2009-04-08 | 2014-09-17 | コーニンクレッカ フィリップス エヌ ヴェ | Efficient address assignment in coded lighting systems |
US20160245502A1 (en) * | 2015-02-23 | 2016-08-25 | Cambridge International Inc. | Lighted architectural panel system |
Family Cites Families (13)
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 (en) * | 1985-05-07 | 1986-11-11 | Canon Inc | Lighting fixture |
US4933602A (en) * | 1987-03-11 | 1990-06-12 | Hitachi, Ltd. | Apparatus for generating light by utilizing microwave |
WO1998056213A1 (en) * | 1997-06-04 | 1998-12-10 | Fusion Lighting, Inc. | Method and apparatus for improved electrodeless lamp screen |
CN1350698A (en) * | 1999-05-12 | 2002-05-22 | 熔化照明股份有限公司 | High brightness microwave lamp |
JP3580205B2 (en) * | 2000-01-18 | 2004-10-20 | ウシオ電機株式会社 | Electromagnetic energy excitation point light source lamp device |
AU2002239243A1 (en) * | 2000-11-13 | 2002-06-03 | Fusion Lighting, Inc. | Sealed microwave lamp and light distribution system |
KR100430006B1 (en) * | 2002-04-10 | 2004-05-03 | 엘지전자 주식회사 | Plasma lighting system |
EP1414058A3 (en) * | 2002-10-24 | 2006-02-15 | Lg Electronics Inc. | Electrodeless lamp system and bulb thereof |
KR20060129862A (en) * | 2005-06-13 | 2006-12-18 | 엘지전자 주식회사 | Plasma lighting system having slopping light transmit hole |
CN1979758A (en) * | 2005-12-05 | 2007-06-13 | 乐金电子(天津)电器有限公司 | Microwave sulfur lamp |
JP2007194012A (en) * | 2006-01-18 | 2007-08-02 | Seiko Epson Corp | Light source device and projector |
JP5208907B2 (en) * | 2009-11-18 | 2013-06-12 | 株式会社環境科学 | Artificial hot spring equipment |
-
2013
- 2013-04-05 DE DE102013005942.9A patent/DE102013005942A1/en not_active Withdrawn
-
2014
- 2014-04-03 TW TW103112595A patent/TWI570353B/en not_active IP Right Cessation
- 2014-04-04 US US14/782,295 patent/US9812314B2/en active Active
- 2014-04-04 WO PCT/EP2014/000904 patent/WO2014161670A1/en active Application Filing
- 2014-04-04 CN CN201480019958.3A patent/CN105340056B/en active Active
- 2014-04-04 EP EP14716755.5A patent/EP2981984B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
CN105340056A (en) | 2016-02-17 |
CN105340056B (en) | 2018-07-03 |
EP2981984B1 (en) | 2016-12-14 |
DE102013005942A1 (en) | 2014-10-23 |
US9812314B2 (en) | 2017-11-07 |
US20160027634A1 (en) | 2016-01-28 |
TW201447169A (en) | 2014-12-16 |
WO2014161670A1 (en) | 2014-10-09 |
TWI570353B (en) | 2017-02-11 |
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