EP2071231B1 - Lamp, in particular room lamp - Google Patents

Lamp, in particular room lamp Download PDF

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Publication number
EP2071231B1
EP2071231B1 EP20080021276 EP08021276A EP2071231B1 EP 2071231 B1 EP2071231 B1 EP 2071231B1 EP 20080021276 EP20080021276 EP 20080021276 EP 08021276 A EP08021276 A EP 08021276A EP 2071231 B1 EP2071231 B1 EP 2071231B1
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EP
European Patent Office
Prior art keywords
illumination
sources
light
lamp according
openings
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
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EP20080021276
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German (de)
French (fr)
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EP2071231A1 (en
Inventor
Jürgen Honold
Markus Mohn
Dietrich Brennenstuhl
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Nimbus Group GmbH
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Nimbus Group GmbH
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Publication of EP2071231A1 publication Critical patent/EP2071231A1/en
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    • 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
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape

Definitions

  • the invention relates to a luminaire, according to the preamble of claim 1.
  • Such a light is off EP 1 843 081 A2 known.
  • the openings and illumination sources are arranged perpendicular to the flat surface of the diffuse light-scattering plate-shaped body.
  • a high directional illuminance is achieved directly below the light and on the other hand allows a visually appealing radiation.
  • the primary radiation of the luminaire only covers a relatively small area. For example, if the surface of an entire desk is to be illuminated, the luminaire would have to have a large extent in the horizontal direction.
  • the present invention has for its object to provide a lamp whose usability is extended.
  • the primary radiation of the lamp is inclined with respect to the flat surface.
  • the inclined main axes surface areas primary radiation
  • all lighting sources are with theirs Main axes inclined arranged, although this is not mandatory. It is guaranteed a directed uniform primary radiation.
  • the assembly, in particular the Kontackttechnik the lighting sources is simplified.
  • the diffusely light-scattering plate-shaped body preferably comprises a plastic injection-molded part.
  • the openings can be introduced into the same after removal of the plate-shaped body. Preferably, they are already introduced during injection molding in the plate-shaped body.
  • the illumination sources preferably each comprise a surface mounted device (SMD), which emits light from a flat side. The main axes of the light sources are perpendicular to the flat side of the illumination source.
  • SMD surface mounted device
  • a portion of the luminous power emitted by the illumination sources is branched off and emitted into the room as diffused, scattered secondary radiation by the diffuse light-scattering plate-shaped body.
  • the illumination power of the secondary radiation is much lower than the illumination power of the primary radiation and is preferably only about 10 to 40% of the illumination power of the primary radiation.
  • the respective main axis of the illumination sources and the widening openings with respect to the surface normal of the flat surface of the diffuse light-scattering plate-shaped body by 5 ° - 45 °, in particular by 10 ° - 40 °, more particularly by 15 ° - 35 ° are inclined.
  • the illumination intensity and the radiation characteristic of the primary radiation of the lamp can be specified.
  • the light-scattering plate-shaped Body horizontally and parallel to a surface to be illuminated, such as a desk, arranged.
  • the light exiting through the openings light is thus not only inclined with respect to the light-scattering plate-shaped body, but also applies inclined on the surface to be illuminated and "spreads" due to the expansion of the light beam to a larger area.
  • the sharper an angle ⁇ which is described between the main axis of the illumination source and the surface normal of the flat surface of the diffuse light-scattering plate-shaped body the lower the light intensity of the light incident on the surface to be illuminated.
  • all the major axes of the illumination sources are equally inclined with respect to the surface normal of the planar surface of the diffuse light-scattering plate-shaped body. This leads to a visually appealing radiation.
  • not all major axes of the illumination sources are equally inclined with respect to the surface normal of the planar surface of the diffuse light-scattering plate-shaped body.
  • a plurality of illumination sources and associated openings are arranged in a row, wherein the respective major axes of the illumination sources and the widening openings of a row are parallel and equal inclined. This ensures a directionally uniform primary radiation.
  • a plurality of rows are provided, which may in particular be parallel to one another.
  • the individual rows preferably each have the same distance from each other.
  • the luminaire has a plurality of rows, wherein the respective main axes of the plurality of rows are inclined to different degrees. The inclination of the major axes from one row to the next can thus decrease or increase.
  • a development provides that the respective main axes of the illumination sources are increasingly inclined from row to row. This ensures that the primary radiation is continuously widened from the first row to the last row.
  • both a surface to be illuminated, which is applied directly below and one, which is located farther away, with primary radiation are increasingly inclined from row to row.
  • the openings are bounded by flat flanks so that they have a more prismatic or pyramidal geometry.
  • Other shapes are 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 passage openings through the light-scattering body.
  • the illumination sources can thus radiate unhindered along the main axis in the primary radiation direction without passing through the light-scattering plate-shaped body. This ensures that the illumination sources can radiate with a maximum available illuminance in the direction of a surface to be illuminated.
  • the openings form a maximum opening angle of 50-100 °, in particular 50-90 °, in particular 50-80 ° and more particularly 50-70 °.
  • the diffuse light-scattering plate-shaped body may have an inclined, inclined to the plane of the plate contact surface. It can also have recesses into which the illumination sources can be inserted. Preference is given to an embodiment of the light-scattering plate-shaped body, in which the recesses are formed like a groove, so that, for example, a strip-shaped board with arranged at her several sources of illumination can be inserted and held.
  • the recess preferably has a slope that corresponds to the inclination of the main axes of the illumination sources with respect to the flat surface, so that the illumination sources lie flat on the slope.
  • the illumination sources of a row are arranged on a strip-shaped circuit board. This is the result Assembly, in particular the contacting of the illumination sources simplified.
  • strip-shaped (n) board (s) is inclined with respect to the flat surface of the light scattering body according to the major axes of the illumination sources to the flat surface of the diffuse light scattering plate-shaped body / are.
  • the illumination sources can be applied areally to the boards.
  • the strip-shaped circuit board (s) is / are arranged on a carrier.
  • the carrier is fastened, for example, to a stand of the luminaire and, in addition to the strip-shaped circuit boards, also carries the diffusely light-scattering plate-shaped body.
  • the carrier it is also possible for the carrier to carry only electrical leads and to carry the illumination sources or the boards and to be held by the diffuse light-scattering plate-shaped body.
  • the carrier is formed from a flat material. This makes it easy and inexpensive to manufacture.
  • a further embodiment provides that the carrier is formed as a bent stamping part made of metal. As a result, it has a high strength.
  • the carrier in particular the bending stamped part, may have areas which are not inclined to the carrier plane for the attachment of strip-shaped circuit boards with illumination sources. This makes it possible for the inclined Arrangement of the illumination sources is effected by the carrier.
  • the carrier has cooling ribs. Due to the lighting sources, heat is always generated in addition to light, which can adversely affect individual components of the luminaire.
  • the heat generated can be forwarded to the cooling fins and discharged by convection to the environment.
  • illumination sources are arranged on two sides of the carrier, so that with a horizontal arrangement of the luminaire, these illumination sources thus emit upward and downward.
  • 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 light-scattering body may be formed by a satin-finished material which is colored in any desired manner. It may 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 illumination sources are formed by LEDs. It is particularly advantageous that LEDs have a long service life and can be applied in a simple manner to the strip-like circuit board. Depending on the desired illumination performance, it proves to be advantageous if the luminaire according to the invention comprises between 10 - 250, in particular 10 - 200, in particular 10 - 150 and further particularly 10 - 100 illumination sources.
  • the illumination power of the secondary radiation is only about 10 to 40% and in particular 10 to 30% of the illumination power of the primary radiation.
  • a luminaire 2, in particular a room luminaire, with a plurality of illumination sources 4 and with a diffusely light-scattering plate-shaped body 8 provided on the emission side 6 of the illumination sources 4 can be seen in the figures.
  • the illumination sources 4 radiate in the direction of a main axis 10 from a primary radiation.
  • the diffuse light-scattering plate-shaped body 8 has a plurality of openings 12 which expand toward the emission side 6. As a result of the openings 12 widening toward the emission side 6, the primary radiation of the illumination sources 4 is formed by the emitted light of the illumination sources 4 passing through the plate-shaped body 8 to the outside substantially unhindered.
  • Light which is not radiated from the illumination sources 4 through the widening openings 12 as the primary radiation is introduced into the diffused light-scattering plate-shaped body 8 and emitted by the latter as diffused secondary radiation.
  • the main axes 10 of the illumination sources 4 and the widening openings 12 are inclined relative to a flat surface 14 of the diffuse light-scattering plate-shaped body 8 (see angle ⁇ in FIG. 4 ).
  • FIG. 1 shows a perspective exploded view of an embodiment of the luminaire 2 according to the invention.
  • the diffuse light-scattering plate-shaped body 8 is arranged on a stand 16. This is connected by means of a receptacle 18 in the mounted state fixed to the stator 16.
  • the diffuse light-scattering plate-shaped body 8 has a substantially rectangular shell-like geometry and includes a plastic injection molded part.
  • the openings 12 are introduced in the course of injection molding in the plate-shaped body 8.
  • the plurality of openings 12 are formed continuously.
  • the openings 12 are arranged in rows 20, wherein a row 20 is perpendicular to a first extension direction 21 of the rectangular body 8.
  • the embodiment according to FIG. 1 shows that a plurality of rows 20 are provided, which are each arranged parallel to one another.
  • FIG. 1 shown embodiment, an electronic unit 22, which includes commercially available electronic elements, which will not be discussed in detail below.
  • a carrier 24 is placed on the diffuse light-scattering plate-shaped body 8. This is a bending stamping made of metal.
  • the carrier 24 has angled portions 26 to which the illumination sources 4 are mounted by means of strip-shaped boards 28.
  • the geometry of the carrier upper part 30 is substantially adapted to that of the carrier 24, in particular the course of the inclined regions 26. It is thereby achieved that the carrier upper part 30 touches the carrier 24 and in particular the inclined regions 26 over a large area.
  • the cooling fins 32 are supplied and discharged by convection to the environment.
  • the diffuse light-scattering plate-shaped body 8 forms a counterpart to the inclined regions 26 of the carrier 24.
  • the openings 12 are inclined with respect to the flat surface 14 of the diffused light scattering plate-shaped body 8.
  • FIG. 2 it can be seen that all the openings 12 are inclined with respect to the flat surface 14 equal.
  • FIGS. 5 and 6 each show embodiments of the luminaire 2 in which the luminaire extends not only along the first extension direction 21, but also along an opposite second extension direction 34 respectively starting from the stator 16th
  • FIG. 5 are all major axes 10 of the illumination sources 4 with respect to the flat surface 14 inclined equal (angle ⁇ ).
  • the lamp 2 for example, can be arranged between two desks and thus simultaneously applied to two surfaces with primary radiation.
  • angle ⁇ ⁇ ⁇ the angle of extension
  • a particular advantage of the invention is that by means of the luminaire 2 according to the invention, a large area to be illuminated can be exposed to primary radiation.

Description

Die Erfindung betrifft eine Leuchte, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a luminaire, according to the preamble of claim 1.

Eine derartige Leuchte ist aus EP 1 843 081 A2 bekannt. Die Öffnungen und Beleuchtungsquellen sind senkrecht zur ebenen Oberfläche des diffus lichtstreuenden plattenförmigen Körpers angeordnet. Dadurch wird einerseits eine hohe gerichtete Beleuchtungsstärke direkt unterhalb der Leuchte erreicht und andererseits eine optisch ansprechende Abstrahlung ermöglicht. Die Primärstrahlung der Leuchte erfasst aber nur eine verhältnismäßig kleine Fläche. Wenn beispielsweise die Fläche eines ganzen Schreibtischs erleuchtet werden soll, so müsste die Leuchte in horizontaler Richtung eine große Erstreckung aufweisen.Such a light is off EP 1 843 081 A2 known. The openings and illumination sources are arranged perpendicular to the flat surface of the diffuse light-scattering plate-shaped body. As a result, on the one hand a high directional illuminance is achieved directly below the light and on the other hand allows a visually appealing radiation. However, the primary radiation of the luminaire only covers a relatively small area. For example, if the surface of an entire desk is to be illuminated, the luminaire would have to have a large extent in the horizontal direction.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Leuchte vorzuschlagen, deren Verwendbarkeit erweitert ist.The present invention has for its object to provide a lamp whose usability is extended.

Diese Aufgabe wird durch eine Leuchte mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a luminaire with the features of claim 1.

Durch die Neigung der Hauptachse der Lichtquellen und der sich erweiternden Öffnungen bezüglich der ebenen Oberfläche wird erreicht, dass die Primärabstrahlung der Leuchte bezüglich der ebenen Oberfläche geneigt ist. Bei einer horizontalen Anordnung des diffus lichtstreuenden plattenförmigen Körpers, beispielsweise an einem Ständer, können somit durch die geneigten Hauptachsen Flächenbereiche beleuchtet werden (Primärstrahlung), die nicht direkt senkrecht unter der Leuchte angeordnet sind. Vorzugsweise sind alle Beleuchtungsquellen mit ihren Hauptachsen geneigt angeordnet, obschon dies nicht zwingend erforderlich ist. Es wird eine gerichtete gleichmäßige Primärabstrahlung gewährleistet. Die Montage, insbesondere die Kontacktierung der Beleuchtungsquellen ist vereinfacht.Due to the inclination of the main axis of the light sources and the widening openings with respect to the flat surface is achieved that the primary radiation of the lamp is inclined with respect to the flat surface. In a horizontal arrangement of the diffuse light-scattering plate-shaped body, for example on a stand, can thus be illuminated by the inclined main axes surface areas (primary radiation), which are not arranged directly vertically below the lamp. Preferably, all lighting sources are with theirs Main axes inclined arranged, although this is not mandatory. It is guaranteed a directed uniform primary radiation. The assembly, in particular the Kontacktierung the lighting sources is simplified.

Der diffus lichtstreuende plattenförmige Körper umfasst bevorzugt ein Kunststoffspritzgussteil. Die Öffnungen können nach der Entformung des plattenförmigen Körpers in denselben eingebracht werden. Bevorzugt werden sie bereits beim Spritzgießen in den plattenförmigen Körper eingebracht. Die Beleuchtungsquellen umfassen bevorzugt jeweils ein Surface Mounted Device (SMD), welches von einer Flachseite Licht ausstrahlt. Die Hauptachsen der Lichtquellen stehen senkrecht auf der Flachseite der Beleuchtungsquelle.The diffusely light-scattering plate-shaped body preferably comprises a plastic injection-molded part. The openings can be introduced into the same after removal of the plate-shaped body. Preferably, they are already introduced during injection molding in the plate-shaped body. The illumination sources preferably each comprise a surface mounted device (SMD), which emits light from a flat side. The main axes of the light sources are perpendicular to the flat side of the illumination source.

Ein Anteil der von den Beleuchtungsquellen abgestrahlten Leuchtleistung wird abgezweigt und durch den diffus lichtstreuenden plattenförmigen Körper als diffus gestreute Sekundärstrahlung in den Raum abgestrahlt. Die Beleuchtungsleistung der Sekundärstrahlung ist dabei sehr viel geringer als die Beleuchtungsleistung der Primärstrahlung und beträgt vorzugsweise nur etwa 10 - 40 % der Beleuchtungsleistung der Primärstrahlung.A portion of the luminous power emitted by the illumination sources is branched off and emitted into the room as diffused, scattered secondary radiation by the diffuse light-scattering plate-shaped body. The illumination power of the secondary radiation is much lower than the illumination power of the primary radiation and is preferably only about 10 to 40% of the illumination power of the primary radiation.

Bei einem erfindungsgemäßen Ausführungsbeispiel ist vorgesehen, dass die jeweilige Hauptachse der Beleuchtungsquellen und die sich erweiternden Öffnungen gegenüber der Flächennormalen der ebenen Oberfläche des diffus lichtstreuenden plattenförmigen Körpers um 5° - 45°, insbesondere um 10° - 40°, weiter insbesondere um 15° - 35° geneigt sind. Über die Neigung der Hauptachsen gegenüber der Flächennormalen der ebenen Oberfläche des diffus lichtstreuenden plattenförmigen Körpers ist die Beleuchtungsintensität und die Abstrahlcharakteristik der Primärstrahlung der Leuchte vorgebbar. In vielen Anwendungsfällen ist der lichtstreuende plattenförmige Körper horizontal und parallel zu einer zu beleuchtenden Fläche, beispielsweise einem Schreibtisch, angeordnet. Das durch die Öffnungen austretende Licht ist also nicht nur gegenüber dem lichtstreuenden plattenförmigen Körper geneigt, sondern trifft auch geneigt auf der zu beleuchtenden Fläche auf und "verteilt" sich aufgrund der Aufweitung des Lichtstrahls auf eine größere Fläche. Je spitzer also ein Winkel α ist, der zwischen der Hauptachse der Beleuchtungsquelle und der Flächennormalen der ebenen Oberfläche des diffus lichtstreuenden plattenförmigen Körpers beschrieben wird, um so geringer ist auch die Lichtintensität des auf die zu beleuchtende Fläche einfallenden Lichts.In an embodiment according to the invention, it is provided that the respective main axis of the illumination sources and the widening openings with respect to the surface normal of the flat surface of the diffuse light-scattering plate-shaped body by 5 ° - 45 °, in particular by 10 ° - 40 °, more particularly by 15 ° - 35 ° are inclined. About the inclination of the major axes with respect to the surface normal of the flat surface of the diffuse light-scattering plate-shaped body, the illumination intensity and the radiation characteristic of the primary radiation of the lamp can be specified. In many applications, the light-scattering plate-shaped Body horizontally and parallel to a surface to be illuminated, such as a desk, arranged. The light exiting through the openings light is thus not only inclined with respect to the light-scattering plate-shaped body, but also applies inclined on the surface to be illuminated and "spreads" due to the expansion of the light beam to a larger area. Thus, the sharper an angle α which is described between the main axis of the illumination source and the surface normal of the flat surface of the diffuse light-scattering plate-shaped body, the lower the light intensity of the light incident on the surface to be illuminated.

Bei einer Ausführungsform der Erfindung sind alle Hauptachsen der Beleuchtungsquellen gegenüber der Flächennormalen der ebenen Oberfläche des diffus lichtstreuenden plattenförmigen Körpers gleich geneigt. Dies führt zu einer optisch ansprechende Abstrahlung.In one embodiment of the invention, all the major axes of the illumination sources are equally inclined with respect to the surface normal of the planar surface of the diffuse light-scattering plate-shaped body. This leads to a visually appealing radiation.

Bei einer anderen Ausführungsform der Erfindung sind nicht alle Hauptachsen der Beleuchtungsquellen gegenüber der Flächennormalen der ebenen Oberfläche des diffus lichtstreuenden plattenförmigen Körpers gleich geneigt.In another embodiment of the invention, not all major axes of the illumination sources are equally inclined with respect to the surface normal of the planar surface of the diffuse light-scattering plate-shaped body.

Erfindungsgemäß sind mehrere Beleuchtungsquellen und zugeordnete Öffnungen in einer Reihe angeordnet, wobei die jeweiligen Hauptachsen der Beleuchtungsquellen und die sich erweiternden Öffnungen einer Reihe parallel und gleich geneigt sind. Dadurch wird eine gerichtete gleichmäßige Primärabstrahlung gewährleistet. Bevorzugt sind mehrere Reihen vorgesehen, die insbesondere parallel zueinander sein können.According to the invention, a plurality of illumination sources and associated openings are arranged in a row, wherein the respective major axes of the illumination sources and the widening openings of a row are parallel and equal inclined. This ensures a directionally uniform primary radiation. Preferably, a plurality of rows are provided, which may in particular be parallel to one another.

Darüber hinaus weisen die einzelnen Reihen bevorzugt jeweils den gleichen Abstand zueinander auf.In addition, the individual rows preferably each have the same distance from each other.

Eine Weiterbildung letztgenannten Ausführungsbeispiels sieht vor, dass die Leuchte mehrere Reihen aufweist, wobei die jeweiligen Hauptachsen der mehreren Reihen unterschiedlich stark geneigt sind. Die Neigung der Hauptachsen von einer Reihe zur nächsten kann also abnehmen oder zunehmen.A development of the latter embodiment provides that the luminaire has a plurality of rows, wherein the respective main axes of the plurality of rows are inclined to different degrees. The inclination of the major axes from one row to the next can thus decrease or increase.

Bevorzugt sieht eine Weiterbildung vor, dass die jeweiligen Hauptachsen der Beleuchtungsquellen von Reihe zu Reihe zunehmend stärker geneigt sind. Dadurch wird erreicht, dass die Primärabstrahlung von der ersten Reihe bis zur letzten Reihe stetig aufgeweitet wird. Von besonderem Vorteil dabei ist, dass sowohl eine zu beleuchtende Fläche, die sich direkt unterhalb als auch eine, die sich weiter entfernt daneben befindet, mit Primärabstrahlung beaufschlagt wird.Preferably, a development provides that the respective main axes of the illumination sources are increasingly inclined from row to row. This ensures that the primary radiation is continuously widened from the first row to the last row. Of particular advantage is that both a surface to be illuminated, which is applied directly below and one, which is located farther away, with primary radiation.

Es erweist sich insbesondere von Vorteil, wenn die Hauptachsen der Beleuchtungsquellen, ausgehend von einem Ständer der Leuchte, in einer ersten Erstreckungsrichtung und/oder in einer zweiten Erstreckungsrichtung mit zunehmenden Abstand vom Ständer, insbesondere von Reihe zu Reihe stärker, geneigt sind. Dadurch können beim Platzieren der Leuchte zwischen zwei Arbeitsplätzen beide Arbeitsplätze mit derselben Leuchte beleuchtet werden.It proves to be particularly advantageous if the main axes of the illumination sources, starting from a stand of the lamp in a first extension direction and / or in a second extension direction with increasing distance from the stand, in particular from row to row stronger, are inclined. As a result, when placing the luminaire between two workplaces, both workstations can be illuminated with the same luminaire.

Bei einem weiteren Ausführungsbeispiel werden die Öffnungen von ebenen Flanken begrenzt, so dass sie eine eher prismatische oder pyramidale Geometrie aufweisen. Auch andere Formen sind denkbar, solange durch die jeweiligen Öffnungen hindurch eine gerichtete Primärabstrahlung der Beleuchtungsquellen in einer Hauptabstrahlrichtung realisierbar ist.In another embodiment, the openings are bounded by flat flanks so that they have a more prismatic or pyramidal geometry. Other shapes are conceivable as long as a directed primary radiation of the illumination sources in a main emission direction can be realized through the respective openings.

Weiter wird ein Ausführungsbeispiel vorgeschlagen, bei dem die Öffnungen Durchgangsöffnungen durch den lichtstreuenden Körper bilden. Die Beleuchtungsquellen können also ungehindert entlang der Hauptachse in Primärabstrahlrichtung abstrahlen, ohne durch den lichtstreuenden plattenförmigen Körper hindurchzustrahlen. Dadurch wird erreicht, dass die Beleuchtungsquellen mit maximal zur Verfügung stehender Beleuchtungsstärke in Richtung auf eine zu beleuchtende Fläche abstrahlen können.Further, an embodiment is proposed in which the openings form passage openings through the light-scattering body. The illumination sources can thus radiate unhindered along the main axis in the primary radiation direction without passing through the light-scattering plate-shaped body. This ensures that the illumination sources can radiate with a maximum available illuminance in the direction of a surface to be illuminated.

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

Des Weiteren erweist es sich als vorteilhaft, wenn die Beleuchtungsquellen an dem diffus lichtstreuenden plattenförmigen Körper gehalten sind. Dazu kann der diffus lichtstreuende plattenförmige Körper eine schräge, zur Plattenebene geneigte Anlagefläche aufweisen. Er kann auch Ausnehmungen aufweisen, in die die Beleuchtungsquellen einlegbar sind. Bevorzugt wird eine Ausführung des lichtstreuenden plattenförmigen Körpers, bei dem die Ausnehmungen nutenartig ausgebildet sind, so dass beispielsweise eine streifenförmige Platine mit an ihr angeordneten mehreren Beleuchtungsquellen einlegbar und gehalten ist. Die Ausnehmung weist bevorzugt eine Schräge auf, die der Neigung der Hauptachsen der Beleuchtungsquellen bezüglich der ebenen Oberfläche entspricht, sodass die Beleuchtungsquellen flächig auf der Schräge aufliegen.Furthermore, it proves to be advantageous if the illumination sources are held on the diffusely light-scattering plate-shaped body. For this purpose, the diffuse light-scattering plate-shaped body may have an inclined, inclined to the plane of the plate contact surface. It can also have recesses into which the illumination sources can be inserted. Preference is given to an embodiment of the light-scattering plate-shaped body, in which the recesses are formed like a groove, so that, for example, a strip-shaped board with arranged at her several sources of illumination can be inserted and held. The recess preferably has a slope that corresponds to the inclination of the main axes of the illumination sources with respect to the flat surface, so that the illumination sources lie flat on the slope.

Erfindungsgemäß sind die Beleuchtungsquellen einer Reihe auf einer streifenförmigen Platine angeordnet. Dadurch ist die Montage, insbesondere die Kontaktierung der Beleuchtungsquellen vereinfacht.According to the invention, the illumination sources of a row are arranged on a strip-shaped circuit board. This is the result Assembly, in particular the contacting of the illumination sources simplified.

Eine Weiterbildung des letztgenannten Ausführungsbeispiels sieht vor, dass die streifenförmige(n) Platine(n) bezüglich der ebenen Oberfläche des lichtstreuenden Körpers entsprechend den Hauptachsen der Beleuchtungsquellen zur ebenen Oberfläche des diffus lichtstreuenden plattenförmigen Körpers geneigt ist/sind. Somit können die Beleuchtungsquellen flächenhaft auf die Platinen aufgebracht werden.A development of the latter embodiment provides that the strip-shaped (n) board (s) is inclined with respect to the flat surface of the light scattering body according to the major axes of the illumination sources to the flat surface of the diffuse light scattering plate-shaped body / are. Thus, the illumination sources can be applied areally to the boards.

Bei einem weiteren bevorzugten Ausführungsbeispiel ist/sind die streifenförmige(n) Platine(n) an einem Träger angeordnet. Der Träger ist dabei beispielsweise an einem Ständer der Leuchte befestigt und trägt neben den streifenförmigen Platinen auch den diffus lichtstreuenden plattenförmigen Körper. Es ist jedoch auch möglich, dass der Träger lediglich elektrische Zuleitungen führt und die Beleuchtungsquellen bzw. die Platinen trägt und von dem diffus lichtstreuenden plattenförmigen Körper gehalten ist.In a further preferred embodiment, the strip-shaped circuit board (s) is / are arranged on a carrier. The carrier is fastened, for example, to a stand of the luminaire and, in addition to the strip-shaped circuit boards, also carries the diffusely light-scattering plate-shaped body. However, it is also possible for the carrier to carry only electrical leads and to carry the illumination sources or the boards and to be held by the diffuse light-scattering plate-shaped body.

Es hat sich als vorteilhaft erwiesen, wenn der Träger aus einem Flachmaterial gebildet ist. Dadurch kann er einfach und kostengünstig hergestellt werden.It has proved to be advantageous if the carrier is formed from a flat material. This makes it easy and inexpensive to manufacture.

Eine Weiterbildung sieht vor, dass der Träger als ein Biegestanzteil aus Metall gebildet ist. Dadurch weist er eine hohe Festigkeit auf.A further embodiment provides that the carrier is formed as a bent stamping part made of metal. As a result, it has a high strength.

Der Träger, insbesondere das Biegestanzteil kann zur Trägerebene abgeneigte Bereiche zur Anbringung von streifenförmigen Platinen mit Beleuchtungsquellen aufweisen. Dadurch ist es möglich, dass die geneigte Anordnung der Beleuchtungsquellen durch den Träger bewirkt wird.The carrier, in particular the bending stamped part, may have areas which are not inclined to the carrier plane for the attachment of strip-shaped circuit boards with illumination sources. This makes it possible for the inclined Arrangement of the illumination sources is effected by the carrier.

Ferner erweist es sich als zweckmäßig, wenn der Träger Kühlrippen aufweist. Durch die Beleuchtungsquellen wird neben Licht immer auch Wärme erzeugt, sich auf einzelne Bauteile der Leuchte nachteilig auswirken kann. Durch das Vorsehen von Kühlrippen am Träger, der bevorzugt aus Metall besteht, kann die entstehende Wärme an die Kühlrippen weitergeleitet werden und durch Konvektion an die Umgebung abgegeben werden.Furthermore, it proves to be expedient if the carrier has cooling ribs. Due to the lighting sources, heat is always generated in addition to light, which can adversely affect individual components of the luminaire. By providing cooling fins on the support, which is preferably made of metal, the heat generated can be forwarded to the cooling fins and discharged by convection to the environment.

Gemäß einer weiteren Ausführungsform sind auf zwei Seiten des Trägers Beleuchtungsquellen angeordnet, so dass bei horizontaler Anordnung der Leuchte diese Beleuchtungsquellen also nach oben und nach unten abstrahlen.In accordance with a further embodiment, illumination sources are arranged on two sides of the carrier, so that with a horizontal arrangement of the luminaire, these illumination sources thus emit upward and downward.

Darüber hinaus kann es sich als optisch ansprechend erweisen, wenn der lichtstreuende Körper von einer Richtung betrachtet sämtliche Komponenten der Leuchte überfängt und im Wesentlichen die ganze Sichtweite der Leuchte zur Abstrahlseite 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.In addition, it may prove to be visually appealing when viewed from one direction, the light scattering body over all components of the lamp and substantially forms the entire field of view of the luminaire to the emission side. 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 lichtstreuende Körper kann von einem an sich beliebig 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.The light-scattering body may be formed by a satin-finished material which is colored in any desired manner. It may 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.

Bevorzugt wird ein Ausführungsbeispiel, bei dem die Beleuchtungsquellen von LEDs gebildet sind. Besonders vorteilhaft dabei ist, dass LEDs eine hohe Lebensdauer aufweisen und in einfacher Weise auf die streifenartige Platine aufbringbar sind. Je nach gewünschter Beleuchtungsleistung erweist es sich als vorteilhaft, wenn die erfindungsgemäße Leuchte zwischen 10 - 250, insbesondere 10 - 200, insbesondere 10 - 150 und weiter insbesondere 10 - 100 Beleuchtungsquellen umfasst.Preferred is an embodiment in which the illumination sources are formed by LEDs. It is particularly advantageous that LEDs have a long service life and can be applied in a simple manner to the strip-like circuit board. Depending on the desired illumination performance, it proves to be advantageous if the luminaire according to the invention comprises between 10 - 250, in particular 10 - 200, in particular 10 - 150 and further particularly 10 - 100 illumination sources.

Schließlich wird ein Ausführungsbeispiel bevorzugt, bei dem die Beleuchtungsleistung der Sekundärabstrahlung nur etwa 10 - 40 % und insbesondere 10 - 30 % der Beleuchtungsleistung der Primärabstrahlung beträgt.Finally, an embodiment is preferred in which the illumination power of the secondary radiation is only about 10 to 40% and in particular 10 to 30% of the illumination power of the primary radiation.

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 explosionsartige Darstellung einer erfindungsgemäßen Leuchte;
Figur 2
eine Draufsicht auf einen diffus lichtstreuenden plattenförmigen Körper;
Figur 3
eine Schnittansicht gemäß Schnitt I-I aus Figur 2 durch den plattenförmigen Körper;
Figur 4
eine Detailansicht einer Öffnung gemäß Figur 3
Figur 5
eine schematische Darstellung eines Ausführungsbeispiels der Leuchte;
Figur 6
eine schematische Darstellung eines weiteren Ausführungsbeispiels der Leuchte.
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 exploded view of a lamp according to the invention;
FIG. 2
a plan view of a diffuse light-scattering plate-shaped body;
FIG. 3
a sectional view according to section II FIG. 2 through the plate-shaped body;
FIG. 4
a detailed view of an opening according to FIG. 3
FIG. 5
a schematic representation of an embodiment of the lamp;
FIG. 6
a schematic representation of another embodiment of the lamp.

Aus den Figuren ist eine Leuchte 2, insbesondere eine Raumleuchte, mit einer Mehrzahl von Beleuchtungsquellen 4 und mit einem auf der Abstrahlseite 6 der Beleuchtungsquellen 4 vorgesehenen diffus lichtstreuenden plattenförmigen Körper 8 ersichtlich. Die Beleuchtungsquellen 4 strahlen dabei in Richtung einer Hauptachse 10 eine Primärabstrahlung ab. Der diffus lichtstreuende plattenförmige Körper 8 weist eine Mehrzahl von sich zur Abstrahlseite 6 hin erweiternden Öffnungen 12 auf. Durch die sich zur Abstrahlseite 6 hin erweiternden Öffnungen 12 wird die Primärabstrahlung der Beleuchtungsquellen 4 dadurch gebildet, dass das emittierte Licht der Beleuchtungsquellen 4 im Wesentlichen unbehindert durch den plattenförmigen Körper 8 nach Außen tritt. Licht, welches von den Beleuchtungsquellen 4 nicht durch die sich erweiternden Öffnungen 12 als Primärabstrahlung abgestrahlt wird, wird in den diffus lichtstreuenden plattenförmigen Körper 8 eingeleitet und durch diesen als diffus gestreute Sekundärabstrahlung abgestrahlt. Die Hauptachsen 10 der Beleuchtungsquellen 4 und die sich erweiternden Öffnungen 12 sind dabei gegenüber einer ebenen Oberfläche 14 des diffus lichtstreuenden plattenförmigen Körpers 8 geneigt (siehe Winkel α in Figur 4).A luminaire 2, in particular a room luminaire, with a plurality of illumination sources 4 and with a diffusely light-scattering plate-shaped body 8 provided on the emission side 6 of the illumination sources 4 can be seen in the figures. The illumination sources 4 radiate in the direction of a main axis 10 from a primary radiation. The diffuse light-scattering plate-shaped body 8 has a plurality of openings 12 which expand toward the emission side 6. As a result of the openings 12 widening toward the emission side 6, the primary radiation of the illumination sources 4 is formed by the emitted light of the illumination sources 4 passing through the plate-shaped body 8 to the outside substantially unhindered. Light which is not radiated from the illumination sources 4 through the widening openings 12 as the primary radiation is introduced into the diffused light-scattering plate-shaped body 8 and emitted by the latter as diffused secondary radiation. The main axes 10 of the illumination sources 4 and the widening openings 12 are inclined relative to a flat surface 14 of the diffuse light-scattering plate-shaped body 8 (see angle α in FIG. 4 ).

Figur 1 zeigt eine perspektivische explosionsartige Darstellung eines Ausführungsbeispiels der erfindungsgemäßen Leuchte 2. Dabei ist der diffus lichtstreuende plattenförmige Körper 8 an einem Ständer 16 angeordnet. Dieser ist mittels einer Aufnahme 18 im montierten Zustand fest mit dem Ständer 16 verbunden. Der diffus lichtstreuende plattenförmige Körper 8 weist eine im Wesentlichen rechteckförmige schalenartige Geometrie auf und umfasst ein Kunstoffspritzgussteil. Die Öffnungen 12 sind dabei im Zuge des Spritzgießens in den plattenförmigen Körper 8 eingebracht. FIG. 1 shows a perspective exploded view of an embodiment of the luminaire 2 according to the invention. In this case, the diffuse light-scattering plate-shaped body 8 is arranged on a stand 16. This is connected by means of a receptacle 18 in the mounted state fixed to the stator 16. The diffuse light-scattering plate-shaped body 8 has a substantially rectangular shell-like geometry and includes a plastic injection molded part. The openings 12 are introduced in the course of injection molding in the plate-shaped body 8.

In dem diffus lichtstreuenden plattenförmigen Körper 8 ist die Mehrzahl von Öffnungen 12 durchgängig ausgebildet. Aus Figur 1 wird ersichtlich, dass die Öffnungen 12 in Reihen 20 angeordnet sind, wobei eine Reihe 20 senkrecht zu einer ersten Erstreckungsrichtung 21 des rechteckförmigen Körpers 8 verläuft. Das Ausführungsbeispiel gemäß Figur 1 zeigt, dass eine Mehrzahl von Reihen 20 vorgesehen ist, die jeweils parallel zueinander angeordnet sind.In the diffused light-scattering plate-shaped body 8, the plurality of openings 12 are formed continuously. Out FIG. 1 it can be seen that the openings 12 are arranged in rows 20, wherein a row 20 is perpendicular to a first extension direction 21 of the rectangular body 8. The embodiment according to FIG. 1 shows that a plurality of rows 20 are provided, which are each arranged parallel to one another.

Darüber hinaus weist das in Figur 1 gezeigte Ausführungsbeispiel eine Elektronikeinheit 22 auf, die handelsübliche Elektronikelemente umfasst, auf die im Folgenden nicht näher eingegangen wird.In addition, the in FIG. 1 shown embodiment, an electronic unit 22, which includes commercially available electronic elements, which will not be discussed in detail below.

Ein Träger 24 ist auf den diffus lichtstreuenden plattenförmigen Körper 8 aufgelegt. Bei diesem handelt es sich um ein Biegestanzteil aus Metall. Der Träger 24 weist abgeneigte Bereiche 26 auf, an denen die Beleuchtungsquellen 4 mittels streifenförmiger Platinen 28 angebracht sind. Auf den Träger 24 ist ein Trägeroberteil 30 aufgesetzt, welches Kühlrippen 32 aufweist. Die Geometrie des Trägeroberteils 30 ist im Wesentlichen der des Trägers 24 insbesondere dem Verlauf der abgeneigten Bereiche 26 angepasst. Dadurch wird erreicht, dass das Trägeroberteil 30 den Träger 24 und insbesondere die abgeneigten Bereiche 26 großflächig berührt. Bei Betrieb der Leuchte 2 kann so entstehende Wärme von den Beleuchtungsquellen 4 an den Träger 24 über das Trägerteil 30 den Kühlrippen 32 zuführt werden und mittels Konvektion an die Umgebung abgegeben werden.A carrier 24 is placed on the diffuse light-scattering plate-shaped body 8. This is a bending stamping made of metal. The carrier 24 has angled portions 26 to which the illumination sources 4 are mounted by means of strip-shaped boards 28. On the carrier 24, a carrier shell 30 is placed, which has cooling fins 32. The geometry of the carrier upper part 30 is substantially adapted to that of the carrier 24, in particular the course of the inclined regions 26. It is thereby achieved that the carrier upper part 30 touches the carrier 24 and in particular the inclined regions 26 over a large area. During operation of the lamp 2, the resulting heat from the illumination sources 4 to the carrier 24 via the support member 30, the cooling fins 32 are supplied and discharged by convection to the environment.

Aus den Figuren 2 - 4 ist ersichtlich, dass der diffus lichtstreuende plattenförmige Körper 8 ein Gegenstück zu den abgeneigten Bereichen 26 des Trägers 24 bildet. Die Öffnungen 12 sind bezüglich der ebenen Oberfläche 14 des diffus lichtstreuenden plattenförmigen Körpers 8 geneigt. Aus Figur 2 ist ersichtlich, dass alle Öffnungen 12 gegenüber der ebenen Oberfläche 14 gleich geneigt sind.From the Figures 2-4 It can be seen that the diffuse light-scattering plate-shaped body 8 forms a counterpart to the inclined regions 26 of the carrier 24. The openings 12 are inclined with respect to the flat surface 14 of the diffused light scattering plate-shaped body 8. Out FIG. 2 it can be seen that all the openings 12 are inclined with respect to the flat surface 14 equal.

Die Figuren 5 und 6 zeigen jeweils Ausführungsbeispiele der Leuchte 2 bei dem sich die Leuchte nicht nur entlang der ersten Erstreckungsrichtung 21 erstreckt, sondern auch entlang einer entgegengesetzten zweiten Erstreckungsrichtung 34 jeweils ausgehend von dem Ständer 16.The FIGS. 5 and 6 each show embodiments of the luminaire 2 in which the luminaire extends not only along the first extension direction 21, but also along an opposite second extension direction 34 respectively starting from the stator 16th

Gemäß Figur 5 sind alle Hauptachsen 10 der Beleuchtungsquellen 4 bezüglich der ebenen Oberfläche 14 gleich geneigt (Winkel α). Vorteilhaft bei dem in Figur 5 gezeigten Ausführungsbeispiel ist, dass die Leuchte 2 beispielsweise zwischen zwei Schreibtischen angeordnet werden kann und somit gleichzeitig zwei Flächen mit Primärabstrahlung beaufschlagt.According to FIG. 5 are all major axes 10 of the illumination sources 4 with respect to the flat surface 14 inclined equal (angle α). Advantageous in the FIG. 5 shown embodiment that the lamp 2, for example, can be arranged between two desks and thus simultaneously applied to two surfaces with primary radiation.

Gemäß dem in Figur 6 gezeigten Ausführungsbeispiel sind die Hauptachsen 10 der Beleuchtungsquellen 4, ausgehend vom Ständer 16, in erster Erstreckungsrichtung 21 bzw. in zweiter Erstreckungsrichtung 34 von Reihe 20 zu Reihe 20 stärker geneigt (Winkel α <β <γ) . Dadurch wird eine Aufweitung der Primärabstrahlung an der zu beleuchtenden Fläche erreicht.According to the in FIG. 6 shown embodiment, the main axes 10 of the illumination sources 4, starting from the stator 16, in the first direction of extent 21 and in the second direction of extension 34 from row 20 to row 20 more inclined (angle α <β <γ). As a result, a widening of the primary radiation is achieved at the surface to be illuminated.

Ein besonderer Vorteil der Erfindung ist, dass mittels der erfindungsgemäßen Leuchte 2 eine große zu beleuchtende Fläche mit Primärstrahlung beaufschlagt werden kann.A particular advantage of the invention is that by means of the luminaire 2 according to the invention, a large area to be illuminated can be exposed to primary radiation.

Claims (13)

  1. Lamp (2), in particular a room lamp, comprising a plurality of sources of illumination (4), in particular in the form of LEDs, and comprising a diffusely light-scattering body (8) in plate form, provided on the radiating side (6) of the sources of illumination (4), wherein the light-scattering body (8) in plate form has a plurality of openings (12), which widen towards the radiating side (6) and through which the sources of illumination (4) radiate largely unhindered by the light-scattering material of the body (8) in plate form to form a primary radiation along a principal axis (10) of the sources of illumination (4), and wherein light that is not radiated by the sources of illumination (4) as primary radiation through the widening openings (12) is introduced into the light-scattering body (8) and is radiated through the latter as diffusely scattered secondary radiation, wherein a number of sources of illumination (4) and assigned openings (12) are arranged in a row, characterized in that the respective principal axis (10) of the sources of illumination (4) and the widening openings (12) are inclined with respect to the normal to a planar surface (14) of the diffusely light-scattering body (8) in plate form, wherein the respective principal axes (10) of the sources of illumination (4) and the widening openings (12) of a row (20) are parallel and equally inclined and wherein a respective row (20) of sources of illumination (4) is arranged on a board (28) in strip form.
  2. Lamp according to Claim 1, characterized in that the respective principal axis (10) of the sources of illumination (4) and the widening openings (12) are inclined with respect to the normal to the planar surface (14) of the diffusely light-scattering body (8) in plate form by 5° - 45°, in particular by 10° - 40°, more particularly by 15° - 35°.
  3. Lamp according to Claim 1 or 2, characterized in that all of the principal axes (10) of the sources of illumination (4) are inclined equally with respect to the normal to the planar surface (14) of the diffusely light-scattering body (8) in plate form or in that not all of the principal axes (10) of the sources of illumination (4) are inclined equally with respect to the normal to the planar surface (14) of the diffusely light-scattering body (8) in plate form.
  4. Lamp according to one of Claims 1-3, characterized in that the lamp (2) has multiple rows (20), wherein the principal axes (10) of the multiple rows (20) are inclined to differing degrees.
  5. Lamp according to Claim 4, characterized in that the respective principal axes (10) of the sources of illumination (4) are inclined to an increasing degree from row (20) to row (20).
  6. Lamp according to one or more of the preceding claims, characterized in that, in a first direction of extent (21) and/or in a second direction of extent (34) from a stand (16) of the lamp (2), the principal axes (10) of the sources of illumination (4) are inclined to a greater degree as the distance from the stand (16) increases, in particular from row (20) to row (20).
  7. Lamp according to one or more of the preceding claims, characterized in that the openings (12) form through-openings through the light-scattering body (8) in plate form.
  8. Lamp according to one or more of the preceding claims, characterized in that the openings (12) form a greatest opening angle of 50 - 100°, in particular of 50 - 90°, in particular of 50 - 80°, in particular of 50 - 70°.
  9. Lamp according to one or more of the preceding claims, characterized in that the sources of illumination (4) are held on the diffusely light-scattering body (8) in plate form.
  10. Lamp according to one of Claims 1-9, characterized in that the board(s) (28) in strip form is/are inclined with respect to the planar surface (14) of the light-scattering body (8) in plate form so as to correspond to the principal axes (10) of the sources of illumination (4) in relation to the planar surface (12) of the diffusely light-scattering body (8) in plate form.
  11. Lamp according to one of Claims 1-10, characterized in that the board(s) (28) in strip form is/are arranged on a carrier (24), in particular in the form of a bent/punched part of metal, and in that the carrier (24) has regions (26) that are inclined away from the plane of the carrier for the mounting of boards (28) in strip form with sources of illumination (4).
  12. Lamp according to one of Claims 1-11, characterized in that the board(s) (28) in strip form is/are arranged on a carrier (24), in particular in the form of a bent/punched part of metal, and in that the carrier (24) has cooling ribs (32).
  13. Lamp according to one or more of the preceding claims, characterized in that the illuminating power of the secondary radiation is only approximately 10 - 40%, in particular 10 - 30%, of the illuminating power of the primary radiation.
EP20080021276 2007-12-13 2008-12-08 Lamp, in particular room lamp Not-in-force EP2071231B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710062268 DE102007062268A1 (en) 2007-12-13 2007-12-13 Luminaire, in particular room lamp

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EP2071231A1 EP2071231A1 (en) 2009-06-17
EP2071231B1 true EP2071231B1 (en) 2014-04-02

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Publication number Priority date Publication date Assignee Title
IT1396979B1 (en) * 2009-12-18 2012-12-20 Dese Elettronica Srl LED LAMP FOR STREET LIGHTING

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE376648T1 (en) * 2000-05-10 2007-11-15 Regent Beleuchtungskoerper Ag LIGHT DISTRIBUTOR FOR A LIGHTING DEVICE AND LIGHTING DEVICE AND USE OF A LIGHTING DEVICE
AU2002222025A1 (en) * 2001-11-22 2003-06-10 Mireille Georges Light-emitting diode illuminating optical device
US8100552B2 (en) * 2002-07-12 2012-01-24 Yechezkal Evan Spero Multiple light-source illuminating system
DE102006016218A1 (en) 2006-04-03 2007-10-04 Nimbus Design Gmbh 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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