EP1843081B1 - Lamp, in particular room lamp - Google Patents

Lamp, in particular room lamp Download PDF

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Publication number
EP1843081B1
EP1843081B1 EP07004838A EP07004838A EP1843081B1 EP 1843081 B1 EP1843081 B1 EP 1843081B1 EP 07004838 A EP07004838 A EP 07004838A EP 07004838 A EP07004838 A EP 07004838A EP 1843081 B1 EP1843081 B1 EP 1843081B1
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EP
European Patent Office
Prior art keywords
light
room
accordance
openings
illuminating device
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Application number
EP07004838A
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German (de)
French (fr)
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EP1843081A2 (en
EP1843081A3 (en
Inventor
Dietrich Brennenstuhl
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Nimbus Group GmbH
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Nimbus Group GmbH
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Classifications

    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/14—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures with many small apertures
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
    • F21S8/033—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Definitions

  • the invention relates to a room lamp.
  • DE 100 57 559 A1 discloses a non-generic photogenerating assembly having a plurality of illumination sources disposed at the bottom of apertures of a shadow mask on a circuit board and radiating only through the apertures of the shadow mask.
  • the openings bounding the openings of the shadow mask serve as reflectors for the radiation.
  • the openings are also filled or covered by a lenticular body, which can influence the emission direction.
  • GB-A-2 306 695 discloses a lamp for the automotive sector.
  • the luminaire is formed from a plurality of bodies, each having a widening opening.
  • the luminaire emits light through these openings in a desired angular range directed from.
  • Light that enters the body is totally reflected on a reflective inner surface so that directional radiation with high light intensity in the desired angular range is also achieved.
  • the US-A-2 904 673 shows a room lamp with a plurality of illumination sources, and with a provided on the emission side of the illumination sources diffusing light scattering plate-shaped body, the diffuse light-scattering plate-shaped body having a plurality of extending to the emitting side of the illumination sources openings through which the illumination sources, forming a primary radiation , radiate from the light-scattering material of the plate-shaped body substantially unimpeded, and wherein light, which is not emitted by the illumination sources through the widening openings as primary radiation, is introduced into the diffuse light-scattering plate-shaped body and is emitted by this as a diffused secondary radiation.
  • WO 2004/102064 A shows a robust light source with a plurality of light-generating elements, wherein the robust light source serves as a walking or driving surface and / or exposed to weather conditions.
  • the light source has a plate-shaped body in which a plurality of flared openings are provided, wherein the walls of the openings are formed reflective, so that light is not introduced into the plate-shaped body.
  • the plate-shaped body 61 is not formed diffusely light scattering.
  • the present invention has for its object to provide a luminaire, with the one hand, a high directional illuminance can be achieved, on the other hand, however, a visually appealing radiation outside the directional radiation is possible.
  • a room lamp with a plurality of illumination sources, which are formed by LEDs, and with a provided on the emission side of the illumination sources diffused light scattering plate-shaped body, wherein the diffused light-scattering plate-shaped body according to the arrangement of the illumination sources a plurality of itself extending to the emission side of the illumination sources openings, through which the illumination sources, forming a primary radiation, radiate from the light-scattering material of the plate-shaped body substantially unhindered, and wherein light which is not emitted by the illumination sources through the widening openings as primary radiation, in the diffused light-scattering plate-shaped body is introduced and is emitted by this as a diffused secondary radiation.
  • a transparent but nevertheless light-scattering body or a translucent body by providing the widening openings in such a way that it aligns radiation of the illumination sources in a predetermined main emission direction and substantially not disabled; this emitted in the main emission direction primary radiation of the illumination sources should thus not just scattered or substantially attenuated or weakened in any way.
  • the illumination power of the secondary radiation is particularly and preferably much lower than that Illumination power of the primary radiation. It is preferably only about 10 to 40%, in particular 10 to 30% of the illumination power of the primary radiation.
  • the secondary radiation illuminates the light-scattering body, and the light is emitted substantially homogeneously on all sides.
  • the widening openings all have the same main axis, wherein the illumination sources are arranged so that they emit in the direction of the respective main axis of the openings.
  • the major axes of the respective openings it would also be possible for the major axes of the respective openings to be slightly inclined relative to one another.
  • the main axes of the respective openings are slightly inclined away from each other, provided that a total directed primary radiation, but associated with a slight widening of the light cone, should be desired.
  • the openings or part of the openings have a conically widening geometry, so be limited by a surface which corresponds to the inside of a cone or truncated cone.
  • the openings are bounded by flat flanks, so that they have a rather prismatic or pyramidal geometry.
  • Other shapes are also conceivable as long as a directed primary radiation of the illumination sources in a main emission direction can be realized through the respective openings.
  • the openings form an opening angle of 50 to 100 °, in particular from 50 to 90 °, in particular from 50 to 80 ° and more particularly from 50 to 70 °.
  • the openings on the side facing the illumination sources have a dimension of the opening area, that is to say a diameter of the clear cross-sectional area of 2 to 7 mm, in particular of 2 to 6 mm, in particular of 4 to 6 mm.
  • the light-scattering body preferably has a thickness in the direction of the main axis of the openings of 3 to 20 mm, in particular 3 to 15 mm, in particular 3 to 10 mm.
  • the openings on the side facing the illumination sources have a diameter of 5 mm and have an opening angle of 60 °.
  • the plate thickness of the body is for example 6 mm.
  • the openings then have on the emission side about 12 mm in diameter.
  • the openings form passage openings through the light-scattering body.
  • the illumination sources can be arranged on a support other than the light-diffusing body.
  • the light-scattering body can be placed as a cover on a the electrical components and the illumination sources receiving carrier of the lamp.
  • the luminaire can advantageously be provided as a flat surface-mounted luminaire on a wall or, preferably, on a ceiling. But it can also be designed as a floor lamp or table lamp or in any other form.
  • the diffusely light-scattering body is plate-shaped, d. H. he has over its thickness greater areal expansion.
  • the thickness should, however, be chosen so that a directed primary radiation corresponding to the ideas can be achieved.
  • the previously stated dimension of the light-diffusing body in the direction of the main axis and the openings may serve as a guide.
  • the light-scattering body may be formed by a solid colored satin material which is inherently colored. It can in particular and advantageously comprise a diffusely scattering plastic material or plastic glass, in particular PMMA. But it could also include paper or a cover made of paper or an open-pore wood material.
  • the light-scattering body can be colorless, white-diffuse or colored, for example red, green, blue or yellow. With colored training, the in distinguish the radiated secondary radiation color of the primary radiation.
  • the LEDs are advantageously formed by so-called white light LEDs.
  • the illumination sources are also advantageously provided in grid or array form. Depending on the desired illumination performance, it proves to be advantageous if the luminaire according to the invention comprises between 2 to 100, in particular 2 to 80, in particular 2 to 70, in particular 10 to 70, in particular 10 to 50 illumination sources.
  • a respective illumination source may comprise, for example, a PLCC6 housing with 2-4 LEDs, in particular with three LEDs.
  • the illumination sources are advantageously provided on a printed circuit board or a carrier in the broadest sense. On this carrier then the light-scattering body is preferably mounted without tools, in particular latched.
  • the figures show a generally designated by the reference numeral 2 lamp with a plurality of illumination sources 4, which are provided in an array on a printed circuit board 6. Radiating side to the illumination sources 4, a plate-shaped diffuse light scattering body 8 is provided. On the back of the circuit board 6, a support plate 10 of the lamp is provided in the form of a folded support plate against which the circuit board and the light-scattering body 8 can be mounted.
  • the illumination sources 4 are each formed in the form of a PLCC6 housing 12 with, for example, three LEDs incorporated therein and contacted with printed conductors of the printed circuit board 6, not shown.
  • the printed circuit board 6 itself comprises a flat aluminum plate 14, on the electrically insulated from the aluminum plate 14, the printed conductors, not shown, are provided.
  • the interconnects and PLCC6 housing are in turn covered with another electrically insulating coating 16 forming the visible side of the printed circuit board 6.
  • a plurality of openings 18 are provided correspondingly to the arrangement of the illumination sources 4.
  • the openings 18 are formed conically in the case shown by way of example and expand in the direction of radiation. They have an opening angle of 60 °.
  • the smaller diameter end 20 of the openings 18 with a diameter of the clear cross-sectional area of 5 mm covers the illumination sources 4 or aligned with the illumination sources 4, as in particular Figures 2 and 3 is apparent. Due to the widening openings 18, a largely directed primary radiation of the illumination sources 4 in the direction of a main emission direction 22 is achieved. In contrast, a small proportion of the radiation or illumination power of the illumination sources 4, which enters the light-diffusing body 8, in particular through the wall 24 delimiting the openings 18, is diffused. Therefore, the diffused light scattering body 8 appears uniformly illuminated.
  • the printed circuit board 6 carrying the illumination source 4 can be mounted on the carrier plate 10.
  • the plate-shaped light-diffusing body 8 with the openings 18 can be snapped onto the support plate 10 preferably without tools.
  • the entire luminaire can be applied directly to a flush-mounted box, in particular screwed over the support plate 10.
  • the other electrical components such as a 12 W converter, housed.
  • the lamp is screwed, for example by means of a screw on a cavity wall, in which case the converter is inserted into the cavity wall. Since the converter usually builds little deep and, for example, has only 22 mm height, a space-saving installation is conceivable.
  • the light 2 with the in FIG. 1 shown components has a construction height of, for example, only 10 mm with an edge length of about 100 to 155 mm. Using a total of 36 LED housings together, a power of, for example, 12 W can be achieved.
  • FIGS. 4 . 5 and 6 show further embodiments of the plate-shaped light-scattering body 8, in which the openings 18 have no conical, but rather a prismatic geometry.
  • the openings 26 of the body 8 according to FIG. 4 are bounded by flat flanks 28.
  • In the embodiment according to FIG. 5 are the openings 26 as at FIG. 4 bounded by planar flanks 28, wherein the transition 29 between the flat flanks 28 is rounded.
  • the openings 30 of the body 8 according to FIG. 6 are bounded by a continuous rounded wall 32.
  • FIG. 7 an embodiment in which the light-scattering body 8 may also be formed by deep-drawing a sheet.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The lamp has multiple of light sources (4). The diffuser (8) has multiple openings (18) which extend radiation face, by which the lighting sources form a primary radiation, from which the material of the diffuser radiates freely. The light from the lighting source is not radiated through the extending opening as primary radiation, in which diffuser is fed. The light is radiated as diffused scattered secondary radiation.

Description

Die Erfindung betrifft eine Raumleuchte.The invention relates to a room lamp.

DE 100 57 559 A1 offenbart eine nicht gattungsgemäße lichterzeugende Anordnung mit einer Mehrzahl von Beleuchtungsquellen, die am Boden von Öffnungen einer Lochmaske auf einer Leiterplatte angeordnet sind und nur durch die Öffnungen der Lochmaske hindurch abstrahlen. Die die Öffnungen begrenzenden Wandungen der Lochmaske dienen als Reflektoren für die Strahlung. Die Öffnungen sind zudem von einem linsenförmigen Körper ausgefüllt bzw. überdeckt, der die Abstrahlrichtung beeinflussen kann. DE 100 57 559 A1 discloses a non-generic photogenerating assembly having a plurality of illumination sources disposed at the bottom of apertures of a shadow mask on a circuit board and radiating only through the apertures of the shadow mask. The openings bounding the openings of the shadow mask serve as reflectors for the radiation. The openings are also filled or covered by a lenticular body, which can influence the emission direction.

GB-A-2 306 695 offenbart eine Leuchte für den Automotiv-Bereich. Die Leuchte ist aus einer Mehrzahl von Körpern gebildet, die jeweils eine sich erweiternde Öffnung besitzen. Die Leuchte strahlt Licht durch diese Öffnungen in einem gewünschten Winkelbereich hindurch gerichtet ab. Licht, das in den Körper eindringt, wird an einer reflektierenden inneren Oberfläche total reflektiert, so dass ebenfalls eine gerichtete Abstrahlung mit hoher Lichtintensität in dem gewünschten Winkelbereich erzielt wird. GB-A-2 306 695 discloses a lamp for the automotive sector. The luminaire is formed from a plurality of bodies, each having a widening opening. The luminaire emits light through these openings in a desired angular range directed from. Light that enters the body is totally reflected on a reflective inner surface so that directional radiation with high light intensity in the desired angular range is also achieved.

Die US-A-2 904 673 zeigt eine Raumleuchte mit einer Mehrzahl von Beleuchtungsquellen, und mit einem auf der Abstrahlseite der Beleuchtungsquellen vorgesehenen diffus lichtstreuenden plattenförmigen Körper, wobei der diffus lichtstreuende plattenförmige Körper eine Mehrzahl von sich zur Abstrahlseite der Beleuchtungsquellen hin erweiternden Öffnungen aufweist, durch welche die Beleuchtungsquellen, eine Primärabstrahlung bildend, von dem lichtstreuenden Material des plattenförmigen Körpers im wesentlichen unbehindert abstrahlen, und wobei Licht, welches von den Beleuchtungsquellen nicht durch die sich erweiternden Öffnungen als Primärstrahlung abgestrahlt wird, in den diffus lichtstreuenden plattenförmigen Körper eingeleitet wird und durch diesen als diffus gestreute Sekundärstrahlung abgestrahlt wird.The US-A-2 904 673 shows a room lamp with a plurality of illumination sources, and with a provided on the emission side of the illumination sources diffusing light scattering plate-shaped body, the diffuse light-scattering plate-shaped body having a plurality of extending to the emitting side of the illumination sources openings through which the illumination sources, forming a primary radiation , radiate from the light-scattering material of the plate-shaped body substantially unimpeded, and wherein light, which is not emitted by the illumination sources through the widening openings as primary radiation, is introduced into the diffuse light-scattering plate-shaped body and is emitted by this as a diffused secondary radiation.

WO 2004/102064 A zeigt eine robuste Lichtquelle mit einer Mehrzahl von lichterzeugenden Elementen, wobei die robuste Lichtquelle als Geh- beziehungsweise Fahrfläche dient und/oder Witterungsverhältnissen ausgesetzt ist. Die Lichtquelle weist einen plattenförmigen Körper auf, in dem mehrere sich erweiternde Öffnungen vorgesehen sind, wobei die Wandungen der Öffnungen reflektierend ausgebildet sind, sodass Licht nicht in den plattenförmigen Körper eingeleitet wird. Der plattenförmige Körper 61 ist nicht diffus lichtstreuend ausgebildet. WO 2004/102064 A shows a robust light source with a plurality of light-generating elements, wherein the robust light source serves as a walking or driving surface and / or exposed to weather conditions. The light source has a plate-shaped body in which a plurality of flared openings are provided, wherein the walls of the openings are formed reflective, so that light is not introduced into the plate-shaped body. The plate-shaped body 61 is not formed diffusely light scattering.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Leuchte zu schaffen, mit der einerseits eine hohe gerichtete Beleuchtungsstärke erreicht werden kann, wobei andererseits aber auch eine optisch ansprechende Abstrahlung außerhalb der gerichteten Abstrahlung möglich ist.The present invention has for its object to provide a luminaire, with the one hand, a high directional illuminance can be achieved, on the other hand, however, a visually appealing radiation outside the directional radiation is possible.

Diese Aufgabe wird erfindungsgemäß durch eine Raumleuchte, gelöst, mit einer Mehrzahl von Beleuchtungsquellen, die von LEDs gebildet sind, und mit einem auf der Abstrahlseite der Beleuchtungsquellen vorgesehenen diffus lichtstreuenden plattenförmigen Körper, wobei der diffus lichtstreuende plattenförmige Körperentsprechend der Anordnung der Beleuchtungsquellen eine Mehrzahl von sich zur Abstrahlseite der Beleuchtungsquellen hin erweiternden Öffnungen aufweist, durch welche die Beleuchtungsquellen, eine Primärstrahlung bildend, von dem lichtstreuenden Material des plattenförmigen Körpers im wesentlichen unbehindert abstrahlen, und wobei Licht, welches von den Beleuchtungsquellen nicht durch die sich erweiternden Öffnungen als Primärstrahlung abgestrahlt wird, in den diffus lichtstreuenden plattenförmigen Körper eingeleitet wird und durch diesen als diffus gestreute Sekundärstrahlung abgestrahlt wird.This object is achieved by a room lamp, with a plurality of illumination sources, which are formed by LEDs, and with a provided on the emission side of the illumination sources diffused light scattering plate-shaped body, wherein the diffused light-scattering plate-shaped body according to the arrangement of the illumination sources a plurality of itself extending to the emission side of the illumination sources openings, through which the illumination sources, forming a primary radiation, radiate from the light-scattering material of the plate-shaped body substantially unhindered, and wherein light which is not emitted by the illumination sources through the widening openings as primary radiation, in the diffused light-scattering plate-shaped body is introduced and is emitted by this as a diffused secondary radiation.

Es wird also erfindungsgemäß vorgeschlagen, einen transparenten, jedoch gleichwohl lichtstreuenden Körper oder einen transluzenten Körper durch Vorsehen der sich erweiternden Öffnungen dahingehend auszubilden, dass er Strahlung der Beleuchtungsquellen in einer vorgegebenen Hauptabstrahlungsrichtung ausrichtet und im Wesentlichen nicht behindert; diese in der Hauptabstrahlungsrichtung ausgesandte Primärabstrahlung der Beleuchtungsquellen soll also gerade nicht gestreut oder in irgendeiner Weise wesentlich gedämpft oder geschwächt werden. Zusätzlich soll ein Anteil der von den Beleuchtungsquellen abgestrahlten Strahlung oder Leuchtleistung abgezweigt und durch den diffus lichtstreuenden Körper als diffus gestreute Sekundärstrahlung in den Raum abgestrahlt werden. Die Beleuchtungsleistung der Sekundärstrahlung ist dabei insbesondere und vorzugsweise sehr viel geringer als die Beleuchtungsleistung der Primärstrahlung. Sie beträgt vorzugsweise nur etwa 10 bis 40 %, insbesondere 10 - 30 % der Beleuchtungsleistung der Primärstrahlung. Die Sekundärstrahlung erleuchtet den lichtstreuenden Körper, und das Licht wird allseitig im wesentlichen homogen abgegeben.It is therefore proposed according to the invention to form a transparent but nevertheless light-scattering body or a translucent body by providing the widening openings in such a way that it aligns radiation of the illumination sources in a predetermined main emission direction and substantially not disabled; this emitted in the main emission direction primary radiation of the illumination sources should thus not just scattered or substantially attenuated or weakened in any way. In addition, a portion of the radiated from the illumination sources radiation or luminous power to be diverted and emitted by the diffused light scattering body as diffusely scattered secondary radiation into the room. The illumination power of the secondary radiation is particularly and preferably much lower than that Illumination power of the primary radiation. It is preferably only about 10 to 40%, in particular 10 to 30% of the illumination power of the primary radiation. The secondary radiation illuminates the light-scattering body, and the light is emitted substantially homogeneously on all sides.

Es erweist sich im Hinblick auf eine gerichtete Primärstrahlung als vorteilhaft, wenn die sich erweiternden Öffnungen alle dieselbe Hauptachse aufweisen, wobei die Beleuchtungsquellen so angeordnet sind, dass sie in Richtung der jeweiligen Hauptachse der Öffnungen abstrahlen. Sollte eine fokussierende Primärstrahlung gewünscht sein, so wäre es auch möglich, dass die Hauptachsen der jeweiligen Öffnungen etwas zueinander geneigt sind. Es wäre aber auch denkbar und für verschiedene Anwendungen vorteilhaft, wenn die Hauptachsen der jeweiligen Öffnungen geringfügig voneinander weg geneigt sind, sofern eine zwar insgesamt gerichtete Primärstrahlung, jedoch verbunden mit einer geringfügigen Aufweitung des Lichtkegels, erwünscht sein sollte.It proves to be advantageous with respect to a directed primary radiation, when the widening openings all have the same main axis, wherein the illumination sources are arranged so that they emit in the direction of the respective main axis of the openings. Should a focusing primary radiation be desired, it would also be possible for the major axes of the respective openings to be slightly inclined relative to one another. However, it would also be conceivable and advantageous for various applications if the main axes of the respective openings are slightly inclined away from each other, provided that a total directed primary radiation, but associated with a slight widening of the light cone, should be desired.

Als herstellungstechnisch besonders einfach und damit vorteilhaft erweist es sich, wenn die Öffnungen oder ein Teil der Öffnungen eine sich konisch erweiternde Geometrie aufweisen, also von einer Fläche begrenzt werden, welche der Innenseite eines Kegels oder Kegelstumpfs entspricht. Es wäre aber auch durchaus denkbar und für bestimmte Anwendungen wünschenswert, wenn die Öffnungen von ebenen Flanken begrenzt werden, so dass sie eine eher prismatische oder pyramidale Geometrie aufweisen. Auch andere Formen sind denkbar, solange durch die jeweiligen Öffnungen hindurch eine gerichtete Primärstrahlung der Beleuchtungsquellen in einer Hauptabstrahlrichtung realisierbar ist.As manufacturing technology particularly simple and thus advantageous, it turns out that the openings or part of the openings have a conically widening geometry, so be limited by a surface which corresponds to the inside of a cone or truncated cone. However, it would also be conceivable and desirable for certain applications if the openings are bounded by flat flanks, so that they have a rather prismatic or pyramidal geometry. Other shapes are also conceivable as long as a directed primary radiation of the illumination sources in a main emission direction can be realized through the respective openings.

Es hat sich als zweckmäßig erwiesen, wenn die Öffnungen einen Öffnungswinkel von 50 bis 100°, insbesondere von 50 bis 90°, insbesondere von 50 bis 80° und weiter insbesondere von 50 bis 70° bilden.It has proved to be expedient if the openings form an opening angle of 50 to 100 °, in particular from 50 to 90 °, in particular from 50 to 80 ° and more particularly from 50 to 70 °.

Des weitere erweist es sich als vorteilhaft, wenn die Öffnungen auf der den Beleuchtungsquellen zugewandten Seite eine Abmessung der Öffnungsfläche, also einen Durchmesser der lichten Querschnittsfläche von 2 - 7 mm, insbesondere von 2 - 6 mm, insbesondere von 4 - 6 mm haben.Furthermore, it proves to be advantageous if the openings on the side facing the illumination sources have a dimension of the opening area, that is to say a diameter of the clear cross-sectional area of 2 to 7 mm, in particular of 2 to 6 mm, in particular of 4 to 6 mm.

Der lichtstreuende Körper hat bei einer bevorzugten Ausführungsform der erfindungsgemäßen Leuchte vorzugsweise eine Dicke in Richtung der Hauptachse der Öffnungen von 3 bis 20 mm, insbesondere 3 bis 15 mm, insbesondere 3 bis 10 mm.In a preferred embodiment of the luminaire according to the invention, the light-scattering body preferably has a thickness in the direction of the main axis of the openings of 3 to 20 mm, in particular 3 to 15 mm, in particular 3 to 10 mm.

Bei einer bevorzugten Ausführungsform haben die Öffnungen auf der den Beleuchtungsquellen zugewandten Seite einen Durchmesser von 5 mm und weisen einen Öffnungswinkel von 60° auf. Die Plattendicke des Körpers beträgt beispielsweise 6 mm. Die Öffnungen weisen dann auf der Abstrahlseite ca. 12 mm Durchmesser auf. Bei diesen Abmessungen kann z.B. ein PLCC6-Gehäuse mit LED's verwendet werden, wobei die Primärabstrahlung optimal ausgerichtet werden kann und gleichwohl eine homogene Sekundärstrahlung erzielt werden kann.In a preferred embodiment, the openings on the side facing the illumination sources have a diameter of 5 mm and have an opening angle of 60 °. The plate thickness of the body is for example 6 mm. The openings then have on the emission side about 12 mm in diameter. With these dimensions, e.g. a PLCC6 housing with LED's are used, whereby the primary radiation can be optimally aligned and nevertheless a homogeneous secondary radiation can be achieved.

Es erweist sich des Weiteren als herstellungstechnisch und montagetechnisch vorteilhaft, wenn die Öffnungen Durchgangsöffnungen durch den lichtstreuenden Körper bilden. Solchenfalls lassen sich die Beleuchtungsquellen auf einem von dem lichtstreuenden Körper verschiedenen Träger anordnen.It also proves to be advantageous as a manufacturing technology and assembly technology, if the openings form passage openings through the light-scattering body. In such case, the illumination sources can be arranged on a support other than the light-diffusing body.

Es erweist sich weiter als vorteilhaft, wenn der lichtstreuende Körper als Abdeckung auf einen die elektrischen Komponenten und die Beleuchtungsquellen aufnehmenden Träger der Leuchte aufsetzbar ist.It proves to be further advantageous if the light-scattering body can be placed as a cover on a the electrical components and the illumination sources receiving carrier of the lamp.

Als optisch ansprechend kann es sich erweisen, wenn der lichtstreuende Körper von einer Richtung betrachtet sämtliche Komponenten der Leuchte in der betreffenden Betrachtungsebene überfängt und im Wesentlichen die ganze Sichtseite der Leuchte bildet. Solchenfalls lässt sich die Leuchte in vorteilhafter Weise als flache Aufbauleuchte an einer Wand oder vorzugsweise an einer Decke vorsehen. Sie kann aber auch als Stehleuchte oder Tischleuchte oder in sonstiger Form ausgebildet werden.It can prove to be visually appealing if, viewed from one direction, the light-scattering body overhangs all components of the luminaire in the relevant viewing plane and forms substantially the entire visible side of the luminaire. In such a case, the luminaire can advantageously be provided as a flat surface-mounted luminaire on a wall or, preferably, on a ceiling. But it can also be designed as a floor lamp or table lamp or in any other form.

Der diffus lichtstreuende Körper ist plattenförmig ausgebildet sein, d. h. er weist gegenüber seiner Dicke größere flächenhafte Ausdehnung aufweisen. Die Dicke sollte jedoch so gewählt werden, dass eine den Vorstellungen entsprechende gerichtete Primärstrahlung erreicht werden kann. Hierfür mögen die vorausgehend angegebenen Abmessung des lichtstreuenden Körpers in Richtung der Hauptachse und der Öffnungen als Anhaltspunkt dienen.The diffusely light-scattering body is plate-shaped, d. H. he has over its thickness greater areal expansion. The thickness should, however, be chosen so that a directed primary radiation corresponding to the ideas can be achieved. For this, the previously stated dimension of the light-diffusing body in the direction of the main axis and the openings may serve as a guide.

Der lichtstreuende Körper kann von einem an sich beliebigen durchgefärbten satinierten Material gebildet sein. Er kann insbesondere und vorteilhafterweise ein diffus streuendes Kunststoffmaterial oder Kunststoffglas, insbesondere PMMA, umfassen. Er könnte aber auch Papier oder eine Abdeckung aus Papier oder ein offenporiges Holzmaterial umfassen. Der lichtstreuende Körper kann farblos, weiß diffus oder farbig, beispielsweise rot, grün, blau oder gelb ausgebildet sein. Bei farbiger Ausbildung kann sich die in den Raum abgestrahlte Sekundärstrahlung farblich von der Primärstrahlung unterscheiden.The light-scattering body may be formed by a solid colored satin material which is inherently colored. It can in particular and advantageously comprise a diffusely scattering plastic material or plastic glass, in particular PMMA. But it could also include paper or a cover made of paper or an open-pore wood material. The light-scattering body can be colorless, white-diffuse or colored, for example red, green, blue or yellow. With colored training, the in distinguish the radiated secondary radiation color of the primary radiation.

Die LEDs sind vorteilhafterweise von sogenannten Weißlicht-LEDs gebildet. Die Beleuchtungsquellen sind weiter vorteilhafterweise raster- oder arrayförmig vorgesehen. Je nach erwünschter Beleuchtungsleistung erweist es sich als vorteilhaft, wenn die erfindungsgemäße Leuchte zwischen 2 bis 100, insbesondere 2 bis 80, insbesondere 2 bis 70, insbesondere 10 bis 70, insbesondere 10 bis 50 Beleuchtungsquellen umfasst. Eine jeweilige Beleuchtungsquelle kann zum Beispiel ein PLCC6-Gehäuse mit 2 - 4 LEDs, insbesondere mit drei LEDs, umfassen. Die Beleuchtungsquellen sind vorteilhafterweise auf einer Leiterplatte oder einem träger im weitesten Sinn vorgesehen. Auf diesen Träger ist dann der lichtstreuende Körper vorzugsweise werkzeuglos montierbar, insbesondere aufrastbar.The LEDs are advantageously formed by so-called white light LEDs. The illumination sources are also advantageously provided in grid or array form. Depending on the desired illumination performance, it proves to be advantageous if the luminaire according to the invention comprises between 2 to 100, in particular 2 to 80, in particular 2 to 70, in particular 10 to 70, in particular 10 to 50 illumination sources. A respective illumination source may comprise, for example, a PLCC6 housing with 2-4 LEDs, in particular with three LEDs. The illumination sources are advantageously provided on a printed circuit board or a carrier in the broadest sense. On this carrier then the light-scattering body is preferably mounted without tools, in particular latched.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus den beigefügten Patentansprüchen und aus der zeichnerischen Darstellung und nachfolgenden Beschreibung einer bevorzugten Ausführungsform der erfindungsgemäßen Leuchte. In der Zeichnung zeigt:

  • Figur 1 eine perspektivische Ansicht der Basiskomponenten einer erfindungsgemäßen Leuchte in Explosionsdarstellung;
  • Figur 2 eine perspektivische Ansicht einiger Komponenten der Leuchte (aufgeschnitten);
  • Figur 3 eine Schnittansicht mit Schnittebene III-III in Figur 1;
  • Figur 4, 5 und 6
    weitere Ausführungsformen des lichtstreuenden Körpers;
  • Figur 7 eine weitere durch Tiefziehen herstellbare Ausführungsform des lichtstreuenden Körpers.
Further features, details and advantages of the invention will become apparent from the appended claims and the drawings and the following description of a preferred embodiment of the lamp according to the invention. In the drawing shows:
  • FIG. 1 a perspective view of the basic components of a lamp according to the invention in an exploded view;
  • FIG. 2 a perspective view of some components of the lamp (cut);
  • FIG. 3 a sectional view with section plane III-III in FIG. 1 ;
  • FIG. 4 . 5 and 6
    further embodiments of the light-scattering body;
  • FIG. 7 Another embodiment of the light-diffusing body can be produced by deep-drawing.

Die Figuren zeigen eine insgesamt mit dem Bezugszeichen 2 bezeichnete Leuchte mit einer Vielzahl von Beleuchtungsquellen 4, die arrayförmig auf einer Leiterplatte 6 vorgesehen sind. Abstrahlseitig zu den Beleuchtungsquellen 4 ist ein plattenförmiger diffus lichtstreuender Körper 8 vorgesehen. Rückseitig zur Leiterplatte 6 ist eine Trägerplatte 10 der Leuchte in Form eines abgekanteten Trägerblechs vorgesehen, gegen welches die Leiterplatte und der lichtstreuende Körper 8 montierbar ist. Die Beleuchtungsquellen 4 sind jeweils in Form eines PLCC6-Gehäuses 12 mit beispielhaft drei darin aufgenommenen LEDs ausgebildet und mit nicht dargestellten Leiterbahnen der Leiterplatte 6 kontaktiert. Die Leiterplatte 6 selbst umfasst eine ebene Aluminiumplatte 14, auf der elektrisch isoliert zu der Aluminiumplatte 14 die nicht dargestellten Leiterbahnen vorgesehen sind. Die Leiterbahnen und PLCC6-Gehäuse sind wiederum mit einer weiteren die Sichtseite der Leiterplatte 6 bildenden elektrisch isolierenden Beschichtung 16 überdeckt.The figures show a generally designated by the reference numeral 2 lamp with a plurality of illumination sources 4, which are provided in an array on a printed circuit board 6. Radiating side to the illumination sources 4, a plate-shaped diffuse light scattering body 8 is provided. On the back of the circuit board 6, a support plate 10 of the lamp is provided in the form of a folded support plate against which the circuit board and the light-scattering body 8 can be mounted. The illumination sources 4 are each formed in the form of a PLCC6 housing 12 with, for example, three LEDs incorporated therein and contacted with printed conductors of the printed circuit board 6, not shown. The printed circuit board 6 itself comprises a flat aluminum plate 14, on the electrically insulated from the aluminum plate 14, the printed conductors, not shown, are provided. The interconnects and PLCC6 housing are in turn covered with another electrically insulating coating 16 forming the visible side of the printed circuit board 6.

In dem diffus lichtstreuenden Körper 8, der aus einem an sich beliebigen lichtstreuenden Material beschaffen sein kann, ist der Anordnung der Beleuchtungsquellen 4 entsprechend eine Vielzahl von Öffnungen 18 vorgesehen. Die Öffnungen 18 sind im beispielhaft dargestellten Fall konisch ausgebildet und erweitern sich in Abstrahlungsrichtung. Sie haben einen Öffnungswinkel von 60°. Das durchmesserkleinere Ende 20 der Öffnungen 18 mit einem Durchmesser der lichten Querschnittsfläche von 5 mm überdeckt die Beleuchtungsquellen 4 oder fluchtet mit den Beleuchtungsquellen 4, wie insbesondere aus Figuren 2 und 3 ersichtlich ist. Durch die sich erweiternden Öffnungen 18 wird eine weitgehend gerichtete Primärabstrahlung der Beleuchtungsquellen 4 in Richtung einer Hauptabstrahlrichtung 22 erreicht. Ein demgegenüber geringer Anteil der Strahlung oder Beleuchtungsleistung der Beleuchtungsquellen 4, der insbesondere durch die die Öffnungen 18 begrenzende Wandung 24 in den lichtstreuenden Körper 8 eintritt, wird diffus gestreut. Daher erscheint der diffus lichtstreuende Körper 8 gleichmäßig erleuchtet.In the diffuse light scattering body 8, which may be constituted of any arbitrary light-diffusing material, a plurality of openings 18 are provided correspondingly to the arrangement of the illumination sources 4. The openings 18 are formed conically in the case shown by way of example and expand in the direction of radiation. They have an opening angle of 60 °. The smaller diameter end 20 of the openings 18 with a diameter of the clear cross-sectional area of 5 mm covers the illumination sources 4 or aligned with the illumination sources 4, as in particular Figures 2 and 3 is apparent. Due to the widening openings 18, a largely directed primary radiation of the illumination sources 4 in the direction of a main emission direction 22 is achieved. In contrast, a small proportion of the radiation or illumination power of the illumination sources 4, which enters the light-diffusing body 8, in particular through the wall 24 delimiting the openings 18, is diffused. Therefore, the diffused light scattering body 8 appears uniformly illuminated.

Wie bereits erwähnt, lässt sich die die Beleuchtungsquelle 4 tragende Leiterplatte 6 an der Trägerplatte 10 montieren. Der plattenförmige lichtstreuende Körper 8 mit den Öffnungen 18 lässt sich auf die Trägerplatte 10 vorzugsweise werkzeuglos aufrasten. Die gesamte Leuchte kann direkt auf eine Unterputzdose aufgebracht, insbesondere über die Trägerplatte 10 aufgeschraubt werden. In dieser nicht dargestellten Unterputzdose können die weiteren elektrischen Komponenten, beispielsweise ein 12 W-Konverter, untergebracht sein. Es wäre aber auch denkbar, dass die Leuchte beispielsweise mittels einer Schraubverbindung auf eine Hohlwand aufgeschraubt wird, wobei dann der Konverter in die Hohlwand eingelegt wird. Da der Konverter üblicherweise wenig tief baut und beispielsweise nur knapp 22 mm Aufbauhöhe aufweist, ist eine raumsparende Montage denkbar. Aber auch eine zentrale Ansteuerung der Beleuchtungsquellen (also ohne Konverter unmittelbar im Bereich der Leuchte) ist denkbar. Die Leuchte 2 mit den in Figur 1 dargestellten Komponenten weist eine Aufbauhöhe von beispielsweise lediglich 10 mm bei einer Kantenlänge von ca. 100 bis 155 mm auf. Unter Verwendung von insgesamt 36 LED-Gehäusen lässt sich zusammen eine Leistung von beispielsweise 12 W erreichen.As already mentioned, the printed circuit board 6 carrying the illumination source 4 can be mounted on the carrier plate 10. The plate-shaped light-diffusing body 8 with the openings 18 can be snapped onto the support plate 10 preferably without tools. The entire luminaire can be applied directly to a flush-mounted box, in particular screwed over the support plate 10. In this flush-mounted box, not shown, the other electrical components, such as a 12 W converter, housed. It would also be conceivable that the lamp is screwed, for example by means of a screw on a cavity wall, in which case the converter is inserted into the cavity wall. Since the converter usually builds little deep and, for example, has only 22 mm height, a space-saving installation is conceivable. But also a central control of the lighting sources (ie without a converter directly in the field of the light) is conceivable. The light 2 with the in FIG. 1 shown components has a construction height of, for example, only 10 mm with an edge length of about 100 to 155 mm. Using a total of 36 LED housings together, a power of, for example, 12 W can be achieved.

Die Figuren 4, 5 und 6 zeigen weitere Ausführungsformen des plattenförmigen lichtstreuenden Körpers 8, bei denen die Öffnungen 18 keine konische, sondern eher eine prismatische Geometrie aufweisen. Die Öffnungen 26 des Körpers 8 gemäß Figur 4 werden von ebenen Flanken 28 begrenzt. Bei der Ausführungsform gemäß Figur 5 sind die Öffnungen 26 wie bei Figur 4 von ebenen Flanken 28 begrenzt, wobei der Übergang 29 zwischen den ebenen Flanken 28 verrundet ausgebildet ist.
Die Öffnungen 30 des Körpers 8 gemäß Figur 6 sind von einer durchgehend verrundeten Wandung 32 begrenzt.The FIGS. 4 . 5 and 6 show further embodiments of the plate-shaped light-scattering body 8, in which the openings 18 have no conical, but rather a prismatic geometry. The openings 26 of the body 8 according to FIG. 4 are bounded by flat flanks 28. In the embodiment according to FIG. 5 are the openings 26 as at FIG. 4 bounded by planar flanks 28, wherein the transition 29 between the flat flanks 28 is rounded.
The openings 30 of the body 8 according to FIG. 6 are bounded by a continuous rounded wall 32.

Schließlich zeigt Figur 7 eine Ausführungsform, bei der der lichtstreuende Körper 8 auch durch Tiefziehen eines Flachmaterials gebildet sein kann.Finally shows FIG. 7 an embodiment in which the light-scattering body 8 may also be formed by deep-drawing a sheet.

Claims (15)

  1. A room-illuminating device, having a plurality of light sources (4) consisting of LEDs, and having a diffusely light-scattering plate-shaped body (8) provided on the radiating side of the light sources (4), wherein, in accordance with the arrangement of the light sources (4), the diffusely light- scattering plate-shaped body (8) has a plurality of openings (18, 26, 30), which widen toward the radiating side of the light sources (4), through which the light sources (4), while providing a primary radiation, radiate substantially unhindered by the light-scattering material of the plate-shaped body (8), and wherein the light, which is not radiated as the primary radiation from the light sources (4) through the widening openings (18, 26, 30), is introduced into the diffusely light-scattering plate- shaped body (8), and is radiated by the latter as diffusely scattered secondary radiation.
  2. The room-illuminating device in accordance with claim 1, characterized in that the illumination output of the secondary radiation amounts to only approximately 10 to 40%, in particular 10 to 30%, of the illumination output of the primary radiation.
  3. The room-illuminating device in accordance with claim 1 or 2, characterized in that the widening openings (18, 26, 30) have the same main axis (22), wherein the light sources (4) are arranged in such a way that they radiate in the direction of the respective main axis (22) of the openings (18, 26, 30).
  4. The room-illuminating device in accordance with claim 1, 2 or 3, characterized in that the openings (18) have a conically widening geometry.
  5. The room-illuminating device in accordance with claim 1, 2 or 3, characterized in that the openings (18) are delimited by even flanks (28).
  6. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that the openings (18, 26, 30) form an opening angle of 50 to 100°, in particular of 50 to 90°, more particularly of 50 to 80°, more particularly of 50 to 70°.
  7. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that, on the side facing the light sources, the openings have a dimension of the opening surface of 2 to 7 mm, in particular of 2 to 6 mm, more particularly of 4 to 6 mm.
  8. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that the light- scattering body (8) has a thickness in the direction of the main axis of the respective openings of 3 to 20 mm, in particular of 3 to 15 mm, more of particularly of 3 to 10 mm.
  9. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that the openings (18, 26, 30) constitute passages through the light- scattering body (8).
  10. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that the light- scattering body (8) has been placed as a cover on a support (6, 10) of the lamp, which contains electrical components and the light sources (4).
  11. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that, viewed in one direction, the light-scattering body (8) covers all components of the lamp (2) and substantially constitutes the entire visible side of the lamp.
  12. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that the light- scattering body (8) is comprised of a penetratingly-colored satinized material.
  13. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that the light- scattering body (8) is comprised of a diffusely scattering plastic glass, in particular PMMA.
  14. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that the light- scattering body (8) is comprised of paper or an open-pore wood material.
  15. The room-illuminating device in accordance with one or several of the preceding claims, characterized in that it is comprised of 2 to 100, in particular of 2 to 80, more particularly of 2 to 70, more particularly of 10 to 70, more particularly of 10 to 50 light sources (4).
EP07004838A 2006-04-03 2007-03-06 Lamp, in particular room lamp Active EP1843081B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006016218A DE102006016218A1 (en) 2006-04-03 2006-04-03 Lamp e.g. room lamp, has multiple of light sources, and diffuser has multiple openings which extends radiation face, by which lighting sources form primary radiation, from which material of diffuser radiates freely

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EP1843081A2 EP1843081A2 (en) 2007-10-10
EP1843081A3 EP1843081A3 (en) 2008-03-05
EP1843081B1 true EP1843081B1 (en) 2009-06-17

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DE502007000868D1 (en) 2009-07-30
ATE434150T1 (en) 2009-07-15
EP1843081A3 (en) 2008-03-05
DE102006016218A1 (en) 2007-10-04

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