EP1779029B1 - Raster arrangement - Google Patents

Raster arrangement Download PDF

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Publication number
EP1779029B1
EP1779029B1 EP05772637.4A EP05772637A EP1779029B1 EP 1779029 B1 EP1779029 B1 EP 1779029B1 EP 05772637 A EP05772637 A EP 05772637A EP 1779029 B1 EP1779029 B1 EP 1779029B1
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EP
European Patent Office
Prior art keywords
elements
arrangement according
raster arrangement
raster
lamella elements
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EP05772637.4A
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German (de)
French (fr)
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EP1779029A1 (en
Inventor
Siegfried Bickel
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Zumtobel Lighting GmbH Austria
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Zumtobel Lighting GmbH Austria
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Publication of EP1779029A1 publication Critical patent/EP1779029A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2103/00Elongate light sources, e.g. fluorescent tubes

Definitions

  • the present invention relates to a raster arrangement for directing or blinding the light emitted by a light source, which has a multiplicity of juxtaposed raster elements with reflective side walls.
  • Such grid arrangements are used in particular in so-called lamp grids, which are often used as light-influencing elements in luminaires and are intended to concentrate or limit the light emitted by a light source to a predetermined angular range.
  • lamp grids which are often used as light-influencing elements in luminaires and are intended to concentrate or limit the light emitted by a light source to a predetermined angular range.
  • optical elements can be prevented that people are blinded by the light emitted by the light.
  • disturbing reflections in particular on vertical surfaces such as e.g. Screens or windows are avoided.
  • Light grids are therefore used in particular in rooms where there are workstations.
  • a classic lighting grid usually consists of two side reflectors and a plurality of extending between the side reflectors cross blades.
  • the side reflectors ensure glare-free glare when looking from the side onto the luminaire, while the cross-blades are responsible for glare-free glare when viewed in the longitudinal direction of the light source.
  • the cross-blades are responsible for glare-free glare when viewed in the longitudinal direction of the light source.
  • In classic lamp grids-these cross blades are made of sheet metal V-shaped and have a slightly concave side surface.
  • simpler embodiments of transverse blades may also consist of simple sheet metal sections or sheet metal strips which do not have a concave shape.
  • lamp grids have in common that the cross blades have a certain basic height in relation to the side walls of the luminaire grid.
  • the cross blades are about half the height of the side walls to allow for the desired optical effect of the light suppression.
  • a certain ratio between distance and height of the individual slats must be complied with.
  • a typical lighting grid of the type described above is, for example, from the US 6,139,169 known.
  • the grid elements shown in this publication have a height of several centimeters - about 5 cm - on, wherein the distance between two adjacent grid elements is dimensioned slightly larger. Due to these dimensions, however, the possibilities of reducing the overall height of a luminaire are limited.
  • the European patent application EP 0 903 535 describes a lamellae arrangement for lights for dimming and steering of light with a plurality of slats attached to a holder.
  • the lamellae are designed as transparent prism bodies.
  • the present invention has for its object to provide a grid arrangement for glare of the light emitted from a light source, which is as independent as possible of the side reflectors of a luminaire grid in their design and on the other opens up the possibility of grid arrangement in the lowest possible height realize. In addition, it should be possible to provide the grid arrangement without much effort in different dimensions available.
  • the grid arrangement according to the invention accordingly consists of a plurality of grid elements arranged side by side with reflective side walls, wherein according to the invention the grid elements are formed by separate plate elements made of solid material by profiled metal rods, which are held at their two ends in each case by a frame part.
  • the ability to provide raster arrangements in different dimensions without much effort is therefore inventively opened up by the fact that the grid elements are now formed by separate lamellar elements, which are held at its two ends in each case by a frame part.
  • the grid elements are now formed by separate lamellar elements, which are held at its two ends in each case by a frame part.
  • By using separate lamella elements made of solid material it is possible to produce a plurality of lamellar elements in different lengths and then to form these with the aid of the frame parts to the latching arrangement in the desired dimension.
  • the effort to realize in this way a grid arrangement in a particular desired dimension is significantly lower than in other solutions in which the grid assembly is formed as a whole in one piece.
  • the lamellar elements according to the invention compared to the aforementioned sheet metal strips differ in that they are made of solid material and therefore do not have the shape of a thin strip.
  • the ratio of height to width of a fin element should be less than 10: 1, so that the elements themselves have a certain intrinsic stability.
  • the profiled metal rods are made of aluminum. But these metal rods may, for example. Consist of chrome-nickel steel and can be cut to length in a simple manner in the required length. As a result, the realization of grid arrangements in different dimensions is particularly simplified.
  • the lamellar elements preferably have a substantially triangular cross-section, it being possible, analogously to conventional transverse lamellae, for the side walls to be slightly curved.
  • the height of the lamellar elements is max. 3 mm, wherein the width of the lamellar elements in a range of max. 2 mm at the widest point.
  • the lamellar elements are designed straight, but it would also be conceivable to use concave or convex curved lamellar elements, which for optical reasons may well be desired and even causes a particularly effective glare of the light emitted by a light source in certain situations.
  • the frame parts for holding the lamella elements may be made of plastic, wherein the lamellar elements are then arranged with their end portions at least partially within these frame parts. This can be done, for example, by the fact that the lamellar elements are cast with their end portions in the frame parts.
  • the frame parts may in particular also be a side reflector, on the underside of which the lamellar elements are then arranged.
  • a luminaire grid with two elongate side reflectors and the lamellar elements designed in accordance with the invention extending therebetween are obtained overall.
  • the present invention also relates to a luminaire grid with elongated side reflectors and a latching arrangement in the manner described above.
  • Fig. 1 shows as an application example of the present invention, a lamp, as it comes in a classic way, for example.
  • Essential elements of the lamp provided with the reference numeral 1 are on the one hand an elongated light source 2 in the form of a gas discharge lamp, in particular a fluorescent tube, which is arranged in a housing formed by two side walls 3, which also - not shown - means for fixing the lamp. 1 has on a ceiling and is provided for storage of equipment for the lamp 2, for example. Of electronic ballasts.
  • a luminous grid provided with the reference numeral 4 is arranged, which is provided for glare of the light emitted from the light source 2.
  • This light grid 4 initially consists of two slightly curved side reflectors 5, which are responsible for a glare at a view from the side and either consist of a reflective material or at least have reflective inner walls.
  • For a glare in a view in the longitudinal direction of the fluorescent tube 2 provides a arranged at the lower end of the side reflectors 5 locking assembly 10, which consists of a plurality of mutually parallel slat elements 11.
  • the side walls of the lamellar elements 11 may be slightly curved in accordance with the design of classical grid lamellae, as is also the sectional view in FIG Fig. 3 can be removed.
  • Other forms for the Lamella elements 11 would also be conceivable. For example, these could also be trapezoidal or rectangular. It is essential, however, that the lamellar elements 11, the thickness of which, viewed in the emission direction, is tapered or at least constant, consist of solid material and are not formed by simple strips of a reflective material. Thus, the ratio of height to width of a fin element 11 should not exceed the factor 10: 1.
  • the lamellar elements 11 provided for glare have a very small height, which is in the range below about 5 mm and preferably in the range of about 3 mm.
  • the lamellar elements 11 On its upper side, the lamellar elements 11 have a width of about 2 mm. Due to the very small dimensions of the slat elements 11 responsible for glare control, it is necessary for them to have a relatively small spacing between them in the longitudinal direction. In the above-mentioned dimensions with a height of 3 mm and width of 2 mm, for example, it is provided that the lamellar elements have a distance of about 5 mm from one another.
  • the lamellar elements 11 are formed by separate components, it is possible to provide them in various lengths. By using profiled metal rods for the lamellar elements 11, the individual lamellar elements 11 can be cut to length in the desired length in a simple manner, so that the cost for the production of lamellar elements of different lengths is extremely low. It should also be pointed out that the lamellar elements 11 of a grid arrangement 10 do not all have to have the same length. Thus, it would be entirely conceivable to vary the length of the lamellar elements 11 in the longitudinal direction of the grid arrangement 10 in order, for example, to create a trapezoidal or elliptical grid arrangement. Other forms could be realized in this way.
  • the two side reflectors 5 of the light grid 4 at the same time also form the frame parts for holding the lamellar elements 11.
  • the side reflectors 5 are flanged at their lower ends 6, wherein in both the downwardly directed inner wall 7a and in the upwardly curved outer wall 7b insertion openings 8a and 8b are provided, - so that the end portions of the profiled metal rods completely through these two walls 7a, 7b can be pushed through.
  • the openings 8a and 8b are dimensioned such that the metal rods in the openings 8a, 8b through Friction be held.
  • the 4 and 5 show a second variant of the grid arrangement according to the invention, in which in turn the frame parts for lateral support of the fin elements are formed by the lower regions of two side reflectors 5 of a luminaire grid.
  • the difference to the embodiment of Fig. 1 and 2 is that the lower end portion 6 of the side reflector 5 is flanged in angled shape and only the inner wall 7a has a plug-in opening 8a for the end portions of the fin elements 11.
  • FIGS Fig. 6 to 8 A third embodiment of the present invention is shown in FIGS Fig. 6 to 8 illustrated and differs from the first two embodiments essentially in the fact that now no longer form the side walls 5 of a luminaire grid, the frame parts for the latch assembly 10. Instead, the locking arrangement 10 is now designed as a separate element which is attached only to the underside of the reflectors 5. According to the representations in the Fig. 6 to 8 Accordingly, separate elongated frame parts 15 are provided which hold the end portions of the lamellar elements 11, respectively. These frame parts 15 may, for example, consist of plastic, wherein the lamellar elements 11 then, for example, can still be pressed into the soft plastic frame to form the desired latching arrangement 10.
  • the lamellar elements 11 are encapsulated at their ends with the plastic to form the frame parts 15, which is preferable for manufacturing reasons, since this is a particularly simple production of the grid assembly 10 is made possible.
  • these separate frame parts 15 could in turn have plug-in openings into which the lamellar elements 11 are inserted.
  • the resulting total grid assembly 10 which - as already mentioned - can be produced in a variety of dimensions and shapes, can then be attached to the underside of the side reflectors 5, whereby the in the 6 and 8 shown arrangement is achieved.
  • FIG Fig. 9 A further variant of the grid arrangement 10 according to the invention is shown in FIG Fig. 9 shown.
  • the lateral frame members 15 are also seen triangular in cross-section and have the preferred slightly curved profile.
  • This particular embodiment of the frame parts 15 may be desired in certain embodiments in order to achieve special optical effects.
  • the lamellar elements were seen always straight in the longitudinal direction.
  • Fig. 10 shows a variant according to which the lamellar elements 11 are slightly curved. This particular curvature can be used in particular to achieve a particular form of light output and also causes a special appearance of the lamp.
  • luminaire grid it would now also be possible to make the luminaires overall much flatter. In particular, it would no longer be necessary to arrange the light source at a greater distance from the latching arrangement in a corresponding embodiment of the grid arrangement in which the lamellar elements are arranged very close to each other. Instead, it is now also possible to realize luminaires which, despite their extremely low overall height, have the photometric properties required for optimum illumination of workplaces.

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

Description

Die vorliegende Erfindung betrifft eine Rasteranordnung zum Lenken bzw. Entblenden des von einer Lichtquelle abgegebenen Lichts, welche eine Vielzahl von nebeneinander angeordneten Rasterelementen mit reflektierenden Seitenwänden aufweist.The present invention relates to a raster arrangement for directing or blinding the light emitted by a light source, which has a multiplicity of juxtaposed raster elements with reflective side walls.

Derartige Rasteranordnungen kommen insbesondere in sog. Leuchtenrastern zum Einsatz, welche oftmals als Lichtbeeinflussungselemente in Leuchten verwendet werden und dazu vorgesehen sind, das von einer Lichtquelle abgegebene Licht auf einen vorgegebenen Winkelbereich zu konzentrieren bzw. zu beschränken. Durch derartige optische Elemente kann verhindert werden, dass Personen durch das von der Leuchte abgegebene Licht geblendet werden. Darüber hinaus können störende Reflektionen insbesondere an senkrecht stehenden Flächen wie z.B. Bildschirmen oder Fenstern vermieden werden. Leuchtenraster kommen daher insbesondere in Räumen zum Einsatz, in denen sich Arbeitsplätze befinden.Such grid arrangements are used in particular in so-called lamp grids, which are often used as light-influencing elements in luminaires and are intended to concentrate or limit the light emitted by a light source to a predetermined angular range. By such optical elements can be prevented that people are blinded by the light emitted by the light. In addition, disturbing reflections, in particular on vertical surfaces such as e.g. Screens or windows are avoided. Light grids are therefore used in particular in rooms where there are workstations.

Ein klassisches Leuchtenraster besteht üblicherweise aus zwei Seitenreflektoren sowie aus einer Vielzahl von sich zwischen den Seitenreflektoren erstreckenden Querlamellen. Die Seitenreflektoren sorgen dabei für Entblendung bei einem Blick von der Seite auf die Leuchte während hingegen die Querlamellen für eine Entblendung bei einem Blick in Längsrichtung auf die Lichtquelle verantwortlich sind. Bei klassischen Leuchtenrastern-sind diese Querlamellen aus Blech V-förmig geformt und weisen eine leicht konkav geformte Seitenfläche auf. Einfachere Ausführungsformen von Querlamellen können allerdings auch aus einfachen Blechabschnitten bzw. Blechstreifen bestehen, die keine konkave Form aufweisen.A classic lighting grid usually consists of two side reflectors and a plurality of extending between the side reflectors cross blades. The side reflectors ensure glare-free glare when looking from the side onto the luminaire, while the cross-blades are responsible for glare-free glare when viewed in the longitudinal direction of the light source. In classic lamp grids-these cross blades are made of sheet metal V-shaped and have a slightly concave side surface. However, simpler embodiments of transverse blades may also consist of simple sheet metal sections or sheet metal strips which do not have a concave shape.

Allen bekannten Ausführungsformen von Leuchtenrastern ist gemeinsam, dass die Querlamellen eine gewisse Grundhöhe im Verhältnis zu den Seitenwänden des Leuchtenrasters aufweisen. Üblicherweise sind die Querlamellen in etwa halb so hoch wie die Seitenwände, um den gewünschten optischen Effekt der Lichtentblendung zu ermöglichen. Darüber hinaus muss ein bestimmtes Verhältnis zwischen Abstand und Höhe der einzelnen Lamellen eingehalten werden.All known embodiments of lamp grids have in common that the cross blades have a certain basic height in relation to the side walls of the luminaire grid. Typically, the cross blades are about half the height of the side walls to allow for the desired optical effect of the light suppression. In addition, a certain ratio between distance and height of the individual slats must be complied with.

Ein typisches Leuchtenraster der oben beschriebenen Art ist bspw. aus der US 6,139,169 bekannt. Die in dieser Veröffentlichung dargestellten Rasterelemente weisen eine Höhe von mehreren Zentimetern - etwa 5 cm - auf, wobei der Abstand zwischen zwei benachbarten Rasterelementen etwas größer bemessen ist. Aufgrund dieser Abmessungen sind die Möglichkeiten, die Bauhöhe einer Leuchte zu reduzieren, allerdings begrenzt.A typical lighting grid of the type described above is, for example, from the US 6,139,169 known. The grid elements shown in this publication have a height of several centimeters - about 5 cm - on, wherein the distance between two adjacent grid elements is dimensioned slightly larger. Due to these dimensions, however, the possibilities of reducing the overall height of a luminaire are limited.

Die europäische Patentanmeldung EP 0 903 535 beschreibt eine Lamellenanordnung für Leuchten zur Abblendung und Lenkung von Licht mit mehreren an einer Halterung befestigten Lamellen. Die Lamellen sind als transparente Prismenkörper ausgebildet.The European patent application EP 0 903 535 describes a lamellae arrangement for lights for dimming and steering of light with a plurality of slats attached to a holder. The lamellae are designed as transparent prism bodies.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Rasteranordnung zur Entblendung des von einer Lichtquelle abgegebenen Lichts zu schaffen, welche in ihrer Gestaltung zum einen möglichst unabhängig von den Seitenreflektoren eines Leuchtenrasters ist und zum anderen die Möglichkeit eröffnet, die Rasteranordnung in einer möglichst geringen Bauhöhe zu realisieren. Darüber hinaus sollte die Möglichkeit bestehen, die Rasteranordnung ohne größeren Aufwand in unterschiedlichen Abmessungen zur Verfügung stellen zu können.The present invention has for its object to provide a grid arrangement for glare of the light emitted from a light source, which is as independent as possible of the side reflectors of a luminaire grid in their design and on the other opens up the possibility of grid arrangement in the lowest possible height realize. In addition, it should be possible to provide the grid arrangement without much effort in different dimensions available.

Die Aufgabe wird durch eine Rasteranordnung, welche die Merkmale des Anspruchs 1 aufweist, gelöst. Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.The object is achieved by a grid arrangement, which has the features of claim 1. Further developments of the invention are the subject of the dependent claims.

Die erfindungsgemäße Rasteranordnung besteht dementsprechend aus einer Vielzahl von nebeneinander angeordneten Rasterelementen mit reflektierenden Seitenwänden, wobei erfindungsgemäß die Rasterelemente durch separate Lamellenelemente aus Vollmaterial durch profilierte Metallstäbe gebildet sind, welche an ihren beiden Enden jeweils von einem Rahmenteil gehalten sind.The grid arrangement according to the invention accordingly consists of a plurality of grid elements arranged side by side with reflective side walls, wherein according to the invention the grid elements are formed by separate plate elements made of solid material by profiled metal rods, which are held at their two ends in each case by a frame part.

Die Möglichkeit, Rasteranordnungen in unterschiedlichen Abmessungen ohne größeren Aufwand zur Verfügung zu stellen, wird also erfindungsgemäß dadurch eröffnet, dass die Rasterelemente nunmehr durch separate Lamellenelemente gebildet sind, welche an ihren beiden Enden jeweils von einem Rahmenteil gehalten sind. Durch die Verwendung separater Lamellenelemente aus Vollmaterial besteht die Möglichkeit, eine Vielzahl von Lamellenelementen in unterschiedlichen Längen herzustellen und diese dann mit Hilfe der Rahmenteile zu der Rastanordnung in der gewünschten Abmessung zu formen. Der Aufwand, auf diese Weise eine Rasteranordnung in einer besonderen gewünschten Abmessung zu realisieren, ist deutlich geringer, als bei anderen Lösungen, bei denen die Rasteranordnung insgesamt einstückig ausgebildet ist.The ability to provide raster arrangements in different dimensions without much effort is therefore inventively opened up by the fact that the grid elements are now formed by separate lamellar elements, which are held at its two ends in each case by a frame part. By using separate lamella elements made of solid material, it is possible to produce a plurality of lamellar elements in different lengths and then to form these with the aid of the frame parts to the latching arrangement in the desired dimension. The effort to realize in this way a grid arrangement in a particular desired dimension, is significantly lower than in other solutions in which the grid assembly is formed as a whole in one piece.

Darauf hinzuweisen ist, dass sich die erfindungsgemäßen Lamellenelemente gegenüber den eingangs erwähnten Blechstreifen darin unterscheiden, dass sie aus Vollmaterial bestehen und dementsprechend nicht die Form eines dünnen Streifens aufweisen. Insbesondere sollte das Verhältnis von Höhe zu Breite eines Lamellenelements kleiner als 10:1 sein, damit die Elemente selbst eine gewisse Eigenstabilität aufweisen.It should be noted that the lamellar elements according to the invention compared to the aforementioned sheet metal strips differ in that they are made of solid material and therefore do not have the shape of a thin strip. In particular, the ratio of height to width of a fin element should be less than 10: 1, so that the elements themselves have a certain intrinsic stability.

In Weiterbildung des grundlegenden Erfindungsgedankens wird vorgeschlagen, die Höhe der Lamellenelemente dramatisch zu reduzieren, wodurch die Möglichkeit geschaffen wird, Lichtbeeinflussungselemente zur Entblendung des von einer Lichtquelle abgegebenen Lichts in deutlich reduzierter Höhe zu realisieren. Durch die Reduzierung der Höhe der Lamellenelemente kann es zwar erforderlich sein, auch den Abstand zwischen den Elementen zu reduzieren, dies ist allerdings durchaus auch erwünscht, da hierdurch ein homogeneres Aussehen der Rastanordnung erzielt wird.In a further development of the basic idea of the invention, it is proposed to reduce the height of the lamellar elements dramatically, thereby creating the possibility of realizing light-influencing elements for glare-freeing the light emitted by a light source in a significantly reduced height. Although it may be necessary to reduce the spacing between the elements as well by reducing the height of the lamellar elements, this is certainly also desirable since this results in a more homogeneous appearance of the latching arrangement.

Gemäß einem bevorzugten Ausführungsbeispiel der vorliegenden Erfindung bestehen die profilierten Metallstäbe aus Aluminium. Diese Metallstäbe können aber bspw. auch aus Chrom-Nickel-Stahl bestehen und können in einfacher Weise in der erforderlichen Länge abgelängt werden. Hierdurch wird die Realisierung von Rasteranordnungen in unterschiedlichen Abmessungen besonders vereinfacht.According to a preferred embodiment of the present invention, the profiled metal rods are made of aluminum. But these metal rods may, for example. Consist of chrome-nickel steel and can be cut to length in a simple manner in the required length. As a result, the realization of grid arrangements in different dimensions is particularly simplified.

Die Lamellenelemente weisen vorzugsweise im wesentlichen einen dreieckigen Querschnitt auf, wobei analog zu klassischen Querlamellen vorgesehen sein kann, dass die Seitenwände leicht gekrümmt sind. Vorzugsweise beträgt die Höhe der Lamellenelemente max. 3 mm, wobei die Breite der Lamellenelemente in einem Bereich von max. 2 mm an der breitesten Stelle liegt.The lamellar elements preferably have a substantially triangular cross-section, it being possible, analogously to conventional transverse lamellae, for the side walls to be slightly curved. Preferably, the height of the lamellar elements is max. 3 mm, wherein the width of the lamellar elements in a range of max. 2 mm at the widest point.

In klassischer Weise sind die Lamellenelemente gerade ausgestaltet, es wäre allerdings auch denkbar, konkav oder konvex gekrümmte Lamellenelemente zu verwenden, was aus optischen Gründen durchaus gewünscht sein kann und in bestimmten Situationen sogar eine besonders effektive Entblendung des von einer Lichtquelle abgegebenen Lichts bewirkt.In a classical manner, the lamellar elements are designed straight, but it would also be conceivable to use concave or convex curved lamellar elements, which for optical reasons may well be desired and even causes a particularly effective glare of the light emitted by a light source in certain situations.

In einer ersten Variante können die Rahmenteile zur Halterung der Lamellenelemente aus Kunststoff bestehen, wobei die Lamellenelemente dann mit ihren Endbereichen zumindest teilweise innerhalb dieser Rahmenteile angeordnet sind. Dies kann bspw. dadurch erfolgen, dass die Lamellenelemente mit ihren Endbereichen in die Rahmenteile eingegossen werden.In a first variant, the frame parts for holding the lamella elements may be made of plastic, wherein the lamellar elements are then arranged with their end portions at least partially within these frame parts. This can be done, for example, by the fact that the lamellar elements are cast with their end portions in the frame parts.

Eine hierzu alternative Möglichkeit besteht allerdings darin, die Rahmenteile mit Öffnungen zu versehen, in welche die Lamellenelemente dann mit ihren Endbereichen eingesteckt werden. In diesem Fall kann es sich bei den Rahmenteilen insbesondere auch um einen Seitenreflektor handeln, an dessen Unterseite dann die Lamellenelemente angeordnet sind. Hierdurch wird insgesamt ein Leuchtenraster mit zwei länglichen Seitenreflektoren sowie den sich dazwischen erstreckenden erfindungsgemäß ausgestalteten Lamellenelementen erhalten. Die vorliegende Erfindung betrifft dementsprechend auch ein Leuchtenraster mit länglichen Seitenreflektoren sowie einer Rastanordnung in der oben beschriebenen Weise.An alternative possibility, however, is to provide the frame parts with openings into which the lamellar elements are then inserted with their end regions. In this case, the frame parts may in particular also be a side reflector, on the underside of which the lamellar elements are then arranged. As a result, a luminaire grid with two elongate side reflectors and the lamellar elements designed in accordance with the invention extending therebetween are obtained overall. Accordingly, the present invention also relates to a luminaire grid with elongated side reflectors and a latching arrangement in the manner described above.

Nachfolgend soll die vorliegende Erfindung anhand der beiliegenden Zeichnung näher erläutert werden. Es zeigen:

Fig. 1
ein erstes Ausführungsbeispiel einer Leuchte mit einer erfindungsgemäßen Rasteranordnung im Schnitt;
Fig. 2
einen vergrößerten Ausschnitt der in Fig. 1 dargestellten Leuchte in perspektivischer Ansicht;
Fig. 3
ein Lamellenelement im Querschnitt;
Fig. 4
eine zweite Variante einer erfindungsgemäßen Rasteranordnung in Schnittdarstellung;
Fig. 5
einen vergrößerten Ausschnitt der in Fig. 4 dargestellten Leuchte in perspektivischer Ansicht;
Fig. 6
ein drittes Ausführungsbeispiel einer Leuchte mit einer erfindungsgemäßen Rasteranordnung;
Fig. 7
einen Ausschnitt der bei dem Ausführungsbeispiel in Fig. 6 verwendeten Rasteranordnung in Aufsicht,
Fig. 8
einen vergrößerten Ausschnitt des Ausführungsbeispiels von Fig. 6 in perspektivischer Darstellung;
Fig. 9
eine weitere Variante einer erfindungsgemäßen Rastanordnung und
Fig. 10
ein Ausführungsbeispiel einer Rasteranordnung, bei der die Lamellenelemente konkav gekrümmt sind.
The present invention will be explained in more detail with reference to the accompanying drawings. Show it:
Fig. 1
a first embodiment of a lamp with a grid arrangement according to the invention in section;
Fig. 2
an enlarged section of the in Fig. 1 illustrated lamp in perspective view;
Fig. 3
a lamellar element in cross section;
Fig. 4
a second variant of a grid arrangement according to the invention in a sectional view;
Fig. 5
an enlarged section of the in Fig. 4 illustrated lamp in perspective view;
Fig. 6
a third embodiment of a lamp with a grid arrangement according to the invention;
Fig. 7
a section of the in the embodiment in Fig. 6 used grid arrangement in supervision,
Fig. 8
an enlarged section of the embodiment of Fig. 6 in perspective view;
Fig. 9
a further variant of a locking arrangement according to the invention and
Fig. 10
An embodiment of a grid arrangement in which the lamellar elements are concavely curved.

Fig. 1 zeigt als Anwendungsbeispiel der vorliegenden Erfindung eine Leuchte, wie sie in klassischer Weise bspw. in Büroräumen oder an sonstigen Arbeitsplätzen zum Einsatz kommt. Wesentliche Elemente der mit dem Bezugszeichen 1 versehenen Leuchte sind zum einen eine längliche Lichtquelle 2 in Form einer Gasentladungslampe, insbesondere einer Leuchtstoffröhre, die in einem durch zwei Seitenwände 3 gebildeten Gehäuse angeordnet ist, welches ferner auch - nicht dargestellte - Mittel zur Befestigung der Leuchte 1 an einer Decke aufweist sowie zur Lagerung von Betriebsmitteln für die Lampe 2, bspw. von elektronischen Vorschaltgeräten vorgesehen ist. Fig. 1 shows as an application example of the present invention, a lamp, as it comes in a classic way, for example. In offices or other workstations is used. Essential elements of the lamp provided with the reference numeral 1 are on the one hand an elongated light source 2 in the form of a gas discharge lamp, in particular a fluorescent tube, which is arranged in a housing formed by two side walls 3, which also - not shown - means for fixing the lamp. 1 has on a ceiling and is provided for storage of equipment for the lamp 2, for example. Of electronic ballasts.

In Lichtabstrahlrichtung gesehen vor der Lichtquelle 2 ist ein mit dem Bezugszeichen 4 versehenes Leuchtenraster angeordnet, welches zur Entblendung des von der Lichtquelle 2 abgegebenen Lichts vorgesehen ist. Dieses Leuchtenraster 4 besteht zunächst aus zwei leicht gekrümmten Seitenreflektoren 5, welche für eine Entblendung bei einem Blick von der Seite verantwortlich sind und entweder aus einem reflektierenden Material bestehen oder zumindest reflektierende Innenwände aufweisen. Für eine Entblendung bei einem Blick in Längsrichtung auf die Leuchtstoffröhre 2 sorgt eine am unteren Ende der Seitenreflektoren 5 angeordnete Rastanordnung 10, welche aus mehreren parallel zueinander angeordneten Lamellenelementen 11 besteht.Seen in light emission direction in front of the light source 2, a luminous grid provided with the reference numeral 4 is arranged, which is provided for glare of the light emitted from the light source 2. This light grid 4 initially consists of two slightly curved side reflectors 5, which are responsible for a glare at a view from the side and either consist of a reflective material or at least have reflective inner walls. For a glare in a view in the longitudinal direction of the fluorescent tube 2 provides a arranged at the lower end of the side reflectors 5 locking assembly 10, which consists of a plurality of mutually parallel slat elements 11.

Diese Lamellenelemente 11, von denen eines im Querschnitt in Fig. 3 dargestellt ist, bestehen aus profilierten Metallstäben, welche im Querschnitt gesehen dreieck- oder keilförmig ausgestaltet sind, wobei die beiden Seitenwände zur Unterseite hin konvergieren. Die Seitenwände der Lamellenelemente 11 können entsprechend der Ausgestaltung klassischer Rasterlamellen leicht gekrümmt sein, wie dies ebenfalls der Schnittdarstellung in Fig. 3 entnommen werden kann. Andere Formen für die Lamellenelemente 11 wären ebenfalls denkbar. Beispielsweise könnten diese auch trapezförmig oder rechteckig ausgestaltet sein. Wesentlich ist allerdings, dass die Lamellenelemente 11, deren Dicke sich in Abstrahlrichtung gesehen verjüngt oder zumindest gleichbleibend ist, aus Vollmaterial bestehen und nicht durch einfache Streifen aus einem reflektierenden Material gebildet sind. So sollte das Verhältnis von Höhe zu Breite eines Lamellenelements 11 den Faktor 10:1 nicht überschreiten.These lamellar elements 11, one of which in cross section in Fig. 3 are represented, consist of profiled metal rods, which are seen in cross-section triangular or wedge-shaped, wherein the two side walls converge toward the bottom. The side walls of the lamellar elements 11 may be slightly curved in accordance with the design of classical grid lamellae, as is also the sectional view in FIG Fig. 3 can be removed. Other forms for the Lamella elements 11 would also be conceivable. For example, these could also be trapezoidal or rectangular. It is essential, however, that the lamellar elements 11, the thickness of which, viewed in the emission direction, is tapered or at least constant, consist of solid material and are not formed by simple strips of a reflective material. Thus, the ratio of height to width of a fin element 11 should not exceed the factor 10: 1.

Ein besonderes Merkmal der dargestellten Ausführungsform besteht darin, dass die zur Entblendung vorgesehen Lamellenelemente 11 eine sehr geringe Höhe aufweisen, die im Bereich unterhalb von etwa 5 mm und vorzugsweise im Bereich von ca. 3 mm liegt. An ihrer Oberseite weisen die Lamellenelemente 11 eine Breite von etwa 2 mm auf. Aufgrund der sehr kleinen Abmessungen der für die Entblendung verantwortlichen Lamellenelemente 11 ist erforderlich, dass diese untereinander in Längsrichtung einen verhältnismäßig geringen Abstand aufweisen. Bei den oben angesprochenen Abmessungen mit einer Höhe von 3 mm und Breite von 2 mm ist bspw. vorgesehen, dass die Lamellenelemente untereinander einen Abstand von ca. 5 mm aufweisen.A particular feature of the illustrated embodiment is that the lamellar elements 11 provided for glare have a very small height, which is in the range below about 5 mm and preferably in the range of about 3 mm. On its upper side, the lamellar elements 11 have a width of about 2 mm. Due to the very small dimensions of the slat elements 11 responsible for glare control, it is necessary for them to have a relatively small spacing between them in the longitudinal direction. In the above-mentioned dimensions with a height of 3 mm and width of 2 mm, for example, it is provided that the lamellar elements have a distance of about 5 mm from one another.

Dadurch, dass die Lamellenelemente 11 durch separate Bauteile gebildet sind, besteht die Möglichkeit, diese in den verschiedensten Längen zur Verfügung zu stellen. Durch die Verwendung profilierte Metallstäbe für die Lamellenelemente 11, können die einzelnen Lamellenelemente 11 in einfacher Weise in der gewünschten Länge abgelängt werden, so dass der Aufwand zur Herstellung von Lamellenelementen unterschiedlicher Länge extrem gering ist.
Ferner ist darauf hinzuweisen, dass die Lamellenelemente 11 einer Rasteranordnung 10 nicht alle die gleiche Länge aufweisen müssen. So wäre es durchaus denkbar, die Länge der Lamellenelemente 11 in Längsrichtung der Rasteranordnung 10 hinweg variieren zu lassen um beispielsweise eine trapezförmige oder ellipsenförmige Rasteranordnung zu schaffen. Auch andere Formen könnten auf diese Weise realisiert werden.
Because the lamellar elements 11 are formed by separate components, it is possible to provide them in various lengths. By using profiled metal rods for the lamellar elements 11, the individual lamellar elements 11 can be cut to length in the desired length in a simple manner, so that the cost for the production of lamellar elements of different lengths is extremely low.
It should also be pointed out that the lamellar elements 11 of a grid arrangement 10 do not all have to have the same length. Thus, it would be entirely conceivable to vary the length of the lamellar elements 11 in the longitudinal direction of the grid arrangement 10 in order, for example, to create a trapezoidal or elliptical grid arrangement. Other forms could be realized in this way.

Aufgrund der Tatsache, dass die Lamellenelemente 11 durch separate Bauteile gebildet sind, ist es erforderlich, diese mit Hilfe von seitlichen Rahmenteilen zu der gewünschten Rasteranordnung 10 zusammenzufügen. Bei dem in den Fig. 1 und 2 dargestellten Ausführungsbeispiel bilden die beiden Seitenreflektoren 5 des Leuchtenrasters 4 zugleich auch die Rahmenteile zur Halterung der Lamellenelemente 11. Wie den Darstellungen in den Fig. 1 und 2 entnommen werden kann, weisen hierzu die beiden Seitenreflektoren 5 Stecköffnungen 8a und 8b auf, in welche die Lamellenelemente 11 mit ihren Endbereichen eingeschoben sind. Genaugenommen sind im dargestellten Ausführungsbeispiel die Seitenreflektoren 5 an ihren unteren Enden 6 umgebördelt, wobei sowohl in der nach unten gerichteten Innenwand 7a als auch in der nach oben gebogenen Außenwand 7b Stecköffnungen 8a und 8b vorgesehen sind,- so dass die Endbereiche der profilierten Metallstäbe vollständig durch diese beiden Wände 7a, 7b hindurch geschoben werden können. Die Öffnungen 8a bzw. 8b sind derart bemessen, dass die Metallstäbe in den Öffnungen 8a, 8b durch Reibschluss gehalten werden. Hierdurch ergibt sich insgesamt eine stabile Anordnung eines Leuchtenrasters mit zwei Seitenreflektoren 5, an dessen Unterseite eine Rasteranordnung 10 im Sinne der vorliegenden Erfindung angeordnet ist. Das auf diese Weise erzielte Leuchtenraster weist hervorragende optische Eigenschaften hinsichtlich der Entblendung des von der Lichtquelle 2 abgegebenen Lichts auf und verleiht aufgrund der filigranen Lamellenelemente 11 darüber hinaus der Leuchte 1 insgesamt ein ansprechendes Aussehen.Due to the fact that the lamellar elements 11 are formed by separate components, it is necessary to assemble them by means of lateral frame parts to the desired grid assembly 10. In the in the Fig. 1 and 2 illustrated embodiment, the two side reflectors 5 of the light grid 4 at the same time also form the frame parts for holding the lamellar elements 11. As the representations in the Fig. 1 and 2 can be removed, for this purpose have the two side reflectors 5 insertion openings 8a and 8b in, in which the lamellar elements 11 are inserted with their end portions. Strictly speaking, in the illustrated embodiment, the side reflectors 5 are flanged at their lower ends 6, wherein in both the downwardly directed inner wall 7a and in the upwardly curved outer wall 7b insertion openings 8a and 8b are provided, - so that the end portions of the profiled metal rods completely through these two walls 7a, 7b can be pushed through. The openings 8a and 8b are dimensioned such that the metal rods in the openings 8a, 8b through Friction be held. This results in a total of a stable arrangement of a luminaire grid with two side reflectors 5, on the underside of a grid assembly 10 is arranged in the sense of the present invention. The luminaire grid achieved in this way has excellent optical properties with respect to the glare of the light emitted by the light source 2 and, due to the filigree lamellar elements 11, furthermore gives the luminaire 1 overall an appealing appearance.

Die Fig. 4 und 5 zeigen eine zweite Variante der erfindungsgemäßen Rasteranordnung, bei der wiederum die Rahmenteile zur seitlichen Halterung der Lamellenelemente durch die unteren Bereiche von zwei Seitenreflektoren 5 eines Leuchtenrasters gebildet werden. Der Unterschied zu dem Ausführungsbeispiel der Fig. 1 und 2 besteht darin, dass der untere Endbereich 6 des Seitenreflektors 5 in eckiger Form umgebördelt ist und lediglich die Innenwand 7a eine Stecköffnung 8a für die Endbereiche der Lamellenelemente 11 aufweist. Im Gegensatz zu dem ersten Ausführungsbeispiel bedeutet dies, dass die Endbereich der Lamellenelemente 11 nicht über die äußeren Seitenwände 7b hervorstehen, was aus optischen Gründen in einigen Fällen bewußt angestrebt wird.The 4 and 5 show a second variant of the grid arrangement according to the invention, in which in turn the frame parts for lateral support of the fin elements are formed by the lower regions of two side reflectors 5 of a luminaire grid. The difference to the embodiment of Fig. 1 and 2 is that the lower end portion 6 of the side reflector 5 is flanged in angled shape and only the inner wall 7a has a plug-in opening 8a for the end portions of the fin elements 11. In contrast to the first embodiment, this means that the end region of the lamellar elements 11 do not protrude beyond the outer side walls 7b, which is deliberately sought in some cases for optical reasons.

Ein drittes Ausführungsbeispiel der vorliegenden Erfindung ist in den Fig. 6 bis 8 dargestellt und unterscheidet sich gegenüber den beiden ersten Ausführungsbeispielen im wesentlichen darin, dass nunmehr nicht mehr die Seitenwände 5 eines Leuchtenrasters die Rahmenteile für die Rastanordnung 10 bilden. Stattdessen ist nunmehr die Rastanordnung 10 als separates Element ausgestaltet, welches lediglich an der Unterseite der Reflektoren 5 befestigt wird. Entsprechend den Darstellungen in den Fig. 6 bis 8 sind dementsprechend separate längliche Rahmenteile 15 vorgesehen, welche jeweils die Endbereiche der Lamellenelemente 11 halten. Diese Rahmenteile 15 können bspw. aus Kunststoff bestehen, wobei die Lamellenelemente 11 dann bspw. noch in den weichen Kunststoffrahmen eingepresst werden können, um die gewünschte Rastanordnung 10 zu bilden. Bei einer bevorzugten Ausführungsvariante allerdings werden die Lamellenelemente 11 an ihren Enden mit dem Kunststoff umspritzt, um die Rahmenteile 15 zu bilden, was aus herstellungstechnischen Gründen zu bevorzugen ist, da hierdurch eine besonders einfache Herstellung der Rasteranordnung 10 ermöglicht wird. Selbstverständlich könnten allerdings auch diese separaten Rahmenteile 15 wiederum Stecköffnungen aufweisen, in welche die Lamellenelemente 11 eingesteckt sind.A third embodiment of the present invention is shown in FIGS Fig. 6 to 8 illustrated and differs from the first two embodiments essentially in the fact that now no longer form the side walls 5 of a luminaire grid, the frame parts for the latch assembly 10. Instead, the locking arrangement 10 is now designed as a separate element which is attached only to the underside of the reflectors 5. According to the representations in the Fig. 6 to 8 Accordingly, separate elongated frame parts 15 are provided which hold the end portions of the lamellar elements 11, respectively. These frame parts 15 may, for example, consist of plastic, wherein the lamellar elements 11 then, for example, can still be pressed into the soft plastic frame to form the desired latching arrangement 10. In a preferred embodiment, however, the lamellar elements 11 are encapsulated at their ends with the plastic to form the frame parts 15, which is preferable for manufacturing reasons, since this is a particularly simple production of the grid assembly 10 is made possible. Of course, however, these separate frame parts 15 could in turn have plug-in openings into which the lamellar elements 11 are inserted.

Die sich hierbei insgesamt ergebende Rasteranordnung 10, die - wie bereits erwähnt wurde - in unterschiedlichsten Abmessungen und Formen hergestellt werden kann, kann dann an der Unterseite der Seitenreflektoren 5 befestigt werden, wodurch die in den Fig. 6 und 8 dargestellte Anordnung erzielt wird.The resulting total grid assembly 10, which - as already mentioned - can be produced in a variety of dimensions and shapes, can then be attached to the underside of the side reflectors 5, whereby the in the 6 and 8 shown arrangement is achieved.

Eine weitere Variante der erfindungsgemäßen Rasteranordnung 10 ist in Fig. 9 dargestellt. Bei dieser Ausgestaltung sind die seitlichen Rahmenteile 15 ebenfalls im Querschnitt gesehen dreieckig geformt und weisen das bevorzugte leicht gekrümmte Profil auf. Diese besondere Ausgestaltung der Rahmenteile 15 kann bei bestimmten Ausführungsvarianten gewünscht sein, um besondere optische Effekte zu erzielen.A further variant of the grid arrangement 10 according to the invention is shown in FIG Fig. 9 shown. In this embodiment, the lateral frame members 15 are also seen triangular in cross-section and have the preferred slightly curved profile. This particular embodiment of the frame parts 15 may be desired in certain embodiments in order to achieve special optical effects.

Bei den bislang besprochenen Varianten der erfindungsgemäßen Rasteranordnung waren die Lamellenelemente in Längsrichtung gesehen immer gerade ausgebildet. Fig. 10 zeigt nunmehr allerdings eine Variante, gemäß der die Lamellenelemente 11 leicht gekrümmt sind. Diese spezielle Krümmung kann insbesondere dazu verwendet werden, eine besondere Form der Lichtabgabe zu erzielen und bewirkt darüber hinaus auch ein besonderes Aussehen der Leuchte.In the previously discussed variants of the grid arrangement according to the invention, the lamellar elements were seen always straight in the longitudinal direction. Fig. 10 However, now shows a variant according to which the lamellar elements 11 are slightly curved. This particular curvature can be used in particular to achieve a particular form of light output and also causes a special appearance of the lamp.

Anzumerken ist ferner, dass bei einer besonders flachen Ausgestaltung des Leuchtenrasters nunmehr auch die Möglichkeit bestehen würde, die Leuchten insgesamt deutlich flacher auszugestalten. Insbesondere wäre es bei einer entsprechenden Ausgestaltung der Rasteranordnung, bei der die Lamellenelemente sehr nahe beieinander angeordnet sind, nicht mehr erforderlich, die Lichtquelle in einem größeren Abstand von der Rastanordnung anzuordnen. Stattdessen können nunmehr auch Leuchten realisiert werden, die trotz ihrer extrem geringen Bauhöhe die zur optimalen Beleuchtung von Arbeitsplätzen erforderlichen lichttechnischen Eigenschaften aufweisen.It should also be noted that with a particularly flat design of the luminaire grid, it would now also be possible to make the luminaires overall much flatter. In particular, it would no longer be necessary to arrange the light source at a greater distance from the latching arrangement in a corresponding embodiment of the grid arrangement in which the lamellar elements are arranged very close to each other. Instead, it is now also possible to realize luminaires which, despite their extremely low overall height, have the photometric properties required for optimum illumination of workplaces.

Claims (15)

  1. Raster arrangement (10) with frame parts and a plurality of raster elements (11) arranged side by side with reflecting side walls for glare-suppressing the light emitted by a light source (2), characterized in that the raster elements are formed by separate lamella elements (11) out of solid material by profiled metal rods, which are held at their two ends by a frame part, respectively.
  2. Raster arrangement according to claim 1, characterized in that the metal rods consist of aluminum.
  3. Raster arrangement according to one of the preceding claims, characterized in that the thickness of the lamella elements (11) tapers, viewed in the direction of radiation, or at least is unchanged.
  4. Raster arrangement according to claim 3, characterized in that the lamella elements (11) have an essentially triangular cross section.
  5. Raster arrangement according to claim 4, characterized in that the side walls of the lamella elements (11) are curved.
  6. Raster arrangement according to one of the preceding claims, characterized in that the height to width ratio of a lamella element (11) does not exceed 10:1.
  7. Raster arrangement according to one of the preceding claims, characterized in that the lamella elements (11) have a height of 5 mm maximum.
  8. Raster arrangement according to claim 7, characterized in that the lamella elements (11) have a height of approx. 3 mm.
  9. Raster arrangement according to claim 8, characterized in that the lamella elements (11) have a width of approx. 2 mm.
  10. Raster arrangement according to one of the preceding claims, characterized in that the lamella elements (11) are straight.
  11. Raster arrangement according to one of the claims 1 to 9, characterized in that the lamella elements (11) are concavely or convexly curved.
  12. Raster arrangement according to one of the preceding claims, characterized in that the frame parts (15) consist of synthetic material, wherein the lamella elements (11) are molded with their end regions at least partially into the frame parts (15).
  13. Raster arrangement according to one of the claims 1 to 11, characterized in that the frame parts (15) have openings (5a) into which the lamella elements (11) are inserted with their end regions.
  14. Raster arrangement according to one of the preceding claims, characterized in that the frame parts are formed, respectively, by a side reflector (5) with the lamella elements (11) being arranged on the underside thereof.
  15. Luminaire with a light source (2) as well as a raster arrangement (10), arranged, viewed in the direction of radiation, before the light source (2), according to one of the preceding claims.
EP05772637.4A 2004-08-16 2005-08-16 Raster arrangement Not-in-force EP1779029B1 (en)

Applications Claiming Priority (2)

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DE102004039676A DE102004039676A1 (en) 2004-08-16 2004-08-16 grid array
PCT/EP2005/008897 WO2006018285A1 (en) 2004-08-16 2005-08-16 Raster arrangement

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EP1779029A1 EP1779029A1 (en) 2007-05-02
EP1779029B1 true EP1779029B1 (en) 2016-04-06

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DE102005035720A1 (en) 2005-07-29 2007-02-08 Zumtobel Staff Gmbh Luminaire with an elongated light source and with a likewise elongated light guide
DE102006027207A1 (en) 2006-02-01 2007-08-02 Zumtobel Lighting Gmbh Ceiling mounted light, has housing forming light discharge opening enclosed by light discharge unit, which has different light radiating characteristic that is opposite to other light radiating characteristic in one of radiation areas
DE102009007489A1 (en) 2009-02-05 2010-08-12 Zumtobel Lighting Gmbh Screen arrangement for use as light influencing element in lighting fixture, has inclined or sloped surfaces provided at edge areas of cover surface to control direct cross-reflection of light delivered from light source

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Publication number Priority date Publication date Assignee Title
US4173034A (en) * 1977-04-01 1979-10-30 Schemitz Sylvan R Lighting system with baffle
DE8330299U1 (en) * 1983-10-18 1984-04-12 Semperlux Gmbh, 1000 Berlin PARABOLIC BLADE ELEMENT FOR LONG-STRETCHED LIGHT SOURCES
NO167944C (en) * 1989-04-07 1991-12-27 Ifa Electric As DEVICE FOR LIGHT RANGE LIGHT
DE29716999U1 (en) * 1997-09-23 1998-01-08 Semperlux GmbH Lichttechnisches Werk, 12277 Berlin Prismatic slats for dimming and directing light
US6139169A (en) 1999-04-01 2000-10-31 Caferro; Ronald N. Encased louvers for outdoor lighting
DE10315268A1 (en) * 2003-04-03 2004-10-14 Zumtobel Staff Gmbh Light influencing element

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EP1779029A1 (en) 2007-05-02
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