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EP2895790B1 - Louver luminaire having led light sources - Google Patents

Louver luminaire having led light sources Download PDF

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Publication number
EP2895790B1
EP2895790B1 EP13760050.8A EP13760050A EP2895790B1 EP 2895790 B1 EP2895790 B1 EP 2895790B1 EP 13760050 A EP13760050 A EP 13760050A EP 2895790 B1 EP2895790 B1 EP 2895790B1
Authority
EP
European Patent Office
Prior art keywords
grid
led light
light sources
optical element
longitudinal axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP13760050.8A
Other languages
German (de)
French (fr)
Other versions
EP2895790A1 (en
Inventor
Patrik Gassner
Bernhard KONZILIA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2895790A1 publication Critical patent/EP2895790A1/en
Application granted granted Critical
Publication of EP2895790B1 publication Critical patent/EP2895790B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/046—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures having multiple lighting devices, e.g. connected to a common ceiling base
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • 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
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • F21V11/04—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type adjustable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a grid lamp with LED light sources (LED: light-emitting diode).
  • Grid lights are known as such from the prior art.
  • a fluorescent tube is provided as a light source.
  • the invention has for its object to provide a corresponding improved LED-based grid lamp;
  • the louver should have improved efficiency.
  • an LED grid lamp with transverse reflector elements in which the light of the LEDs is in each case irradiated between two of the transverse reflector elements.
  • Lens for light bundling are arranged between the LEDs and the transverse reflector elements.
  • Another LED grid is from the US 2009/0323328 A1 known.
  • the light emitted by an LED initially passes through a funnel-like grid element; then it is partially deflected by an elongated reflector element, so that a total of a broad area is illuminated.
  • a grid lamp which has at least two LED light sources, and a grid element which extends along a longitudinal axis, wherein the grid element has at least three transverse reflector elements which extend transversely to the longitudinal axis and by two adjacent transverse Reflector elements each have a Lichtlenkiki the raster element is limited.
  • the grid lamp is designed such that each of the LED light sources is assigned to one of the light guide units.
  • the grid lamp has an optical element which is formed independently of the grid element and which is configured and arranged such that it acts optically between the at least two LED light sources and the light guide units.
  • the optical element makes it possible to achieve that the light emitted by the LED light sources is directed in a particularly targeted manner to the respective light-directing units. This can increase the efficiency of the light output of the grid lamp.
  • the grid element has two, on the longitudinal axis extending side reflectors, wherein the transverse reflector elements are formed by cross blades, which are arranged connecting the two side reflectors.
  • the optical element it can be prevented in particular with the optical element that a light emitted by one of the LED light sources strikes a back surface of a transverse lamella pointing towards the relevant LED light source. The light can thus be used particularly effectively for the light output of the grid light.
  • the optical element has at least two divergence space segments, wherein each of the divergence space segments is bounded by inner surfaces which extend divergently between one of the LED light sources and the light guide unit associated with the respective LED light source.
  • each of the divergence space segments is bounded by inner surfaces which extend divergently between one of the LED light sources and the light guide unit associated with the respective LED light source.
  • the inner surfaces are designed at least partially reflective. A loss of light between the LED light sources and the light guide units can thereby be kept very low.
  • the optical element has transverse limiting elements which extend transversely to the longitudinal axis, wherein a part of the inner surfaces of each divergence space segment is formed by the transverse limiting elements.
  • the optical element has a concavely curved or trough-shaped, profile-like formed carrier element which extends parallel to the longitudinal axis, wherein a further part of the inner surfaces of each divergence space segment is formed by the carrier element.
  • the profile-like carrier element it is advantageously possible to form production side walls of the divergence space segments.
  • the carrier element it can be easily achieved by the carrier element that the divergence space segments are held together mechanically, so that the optical element as a whole, in itself stable unit can be formed. As a result, handling of the grid lamp is facilitated, in particular with respect to a mounting or replacement of the light source.
  • the at least two LED light sources are arranged supported on the carrier element. This makes it possible to save a separate holding element for the LED light sources.
  • the grid lamp is designed such that viewed in a cross section, the carrier element extends on two opposite sides up to the two side reflectors.
  • the optical element can be brought into the intended position in a relative position relative to the grid element particularly easily during the assembly of the grid lamp.
  • the raster element and the optical element are designed such that the optical element can be guided in a separated state from the raster element relative to the raster element parallel to the longitudinal axis guided by the two side reflectors. This can be achieved in particular that for the assembly optical element can be inserted guided from one end side into the grid element.
  • the optical element further comprises a diffuser element optically operatively disposed between the LED light sources and the light directing units.
  • a diffuser element optically operatively disposed between the LED light sources and the light directing units.
  • the diffuser element is a film.
  • the diffuser element may also be formed by a diffusing or by structuring scattering extrusion profile.
  • this structure makes it possible to replace LEDs without significant changes in the emission characteristics, if this makes sense for reasons of cost or efficiency.
  • Fig. 1 shows a perspective sketch of a raster element 3 and an optical element 6 of a lamp according to the invention.
  • the grid element 3 is elongate overall and extends along a longitudinal axis L.
  • Fig. 1 only a part of the raster element 3 is sketched, specifically with respect to the longitudinal axis L, only a longitudinal section of the raster element 3. Analogously applies to the representation of the optical element 6.
  • the louvre luminaire may have a luminaire housing 10 in which the grid element 3 is arranged, wherein preferably also the luminaire housing 10 or the entire grid light is oblong and extends along the longitudinal axis L.
  • the grid lamp may be a recessed luminaire, in particular a recessed ceiling luminaire.
  • Fig. 3 is a longitudinal section through a longitudinal portion of the grid lamp sketched.
  • the grid lamp at least two LED light sources 2, 2 'on.
  • the raster lamp is designed in such a way that a light emitted by the LED light sources 2, 2 'leaves the luminaire, in particular by a light exit opening 12 of the raster lamp formed in the luminaire housing 10.
  • the grid lamp is oriented relative to the vertical, that a discharge of the light is provided downward, so the light exit opening 12 of the lamp housing 10 facing downward, as in the FIGS. 1 to 3 indicated by an arrow u .
  • the grid lamp can also be provided differently oriented. In such a case, the directions etc. are to be reinterpreted accordingly.
  • the grid element 3 on transverse reflector elements 4, which extend transversely to the longitudinal axis L , wherein two adjacent transverse reflector elements 4 each have a Lichtlenkmaschine 5 of the raster element 3 is limited.
  • the grid element 3 has at least three transverse reflector elements 4, so that at least two light guide units 5 are formed.
  • significantly more transverse reflector elements 4 or light-guiding units 5 are provided, For example, at least six or at least ten Lichtlenkmaschineen 5, which are formed in a row along the longitudinal axis L.
  • the in Fig. 3 sketched longitudinal section of the grid lamp comprises three light guide units. 5
  • the distance between two transverse reflector elements 4 along the longitudinal axis L may for example be between 30 mm and 100 mm, preferably between 40 mm and 80 mm.
  • the raster lamp is designed so that each of the LED light sources 2, 2 'is assigned to exactly one of the light-guiding units 5.
  • an LED light source 2 at least two LEDs 21, 22 include, which are arranged in particular on at least one circuit board 13.
  • Each light guide unit 5 is preferably designed to be closed annularly in a horizontal section, so that a light inlet opening or upper opening of the light guide unit 5 is formed due to the ring shape and a light exit opening or lower opening.
  • the design is such that one of the LED light source 2, 2 'radiated light enters through the light inlet opening of the light guide unit 5 in the latter and exits through the light exit opening again and leaves the raster lamp in an outer space.
  • the grid element 3 has two, along the longitudinal axis L extending side reflectors 31, 32 and the transverse reflector elements 4 are formed by transverse lamellae 33 which are arranged connecting the two side reflectors 31, 32.
  • a raster element 3 is known as such from the prior art.
  • Fig. 4 is one of the Fig. 1 corresponding perspective sketch outlined at an angle from above. It can be seen that the transverse lamellae 33 have a back surface 331 on their side pointing toward the LED light sources 2, 2 'or on their upward-pointing side, and - as in FIG Fig. 3 indicated - two main surfaces 332, 333.
  • Each light guide unit 5 is thus through a main surface 332nd a first transverse lamella and a main surface 333 of an adjacent to the first transverse lamella, second transverse lamella bounded in the longitudinal direction.
  • the raster lamp further comprises an optical element 6, which is formed independently of the raster element 3 and which is configured and arranged such that it acts optically between the LED light sources 2, 2 and the light guide units 5.
  • an optical element 6 is designed such that a of one of the LED light sources 2, 2 'emitted light is only in the, the relevant LED light source 2, 2' associated light-deflecting element 5 is irradiated.
  • the optical element 6 may have divergence space segments 7, wherein preferably each of the divergence space segments 7 is assigned to exactly one of the LED light sources 2, 2 '.
  • Each divergence space segment 7 is bounded by inner surfaces 71, 72, 73, 74, which extend divergently between the respective LED light source 2, 2 'and the respectively associated light guide unit 5.
  • the divergence space segments 7 can thus be designed quasi funnel-shaped, wherein an LED light source 2, 2 'is arranged on or in the smaller or upper funnel opening and the larger or lower funnel opening to the relevant light guide unit 5 points.
  • the larger funnel opening is designed such that it corresponds in shape and size of the upper opening or light inlet opening of the relevant light guide unit 5. In this way it can be achieved that particularly little light of the LED light source 2, 2 is lost for the radiation of the raster lamp.
  • light mixing chambers or light chambers can be formed by the divergence space segments 7.
  • the inner surfaces 71, 72, 73, 74 are designed to be at least partially reflective, in particular highly reflective. Preferably, all inner surfaces 71, 72, 73, 74 are designed reflecting.
  • the inner walls 71, 72, 73, 74 may be designed for this purpose, for example, white or as reflective aluminum surfaces.
  • the optical element 6 preferably further comprises transverse limiting elements 8 which extend transversely to the longitudinal axis L , wherein a part of the inner surfaces, namely two transversely to the longitudinal axis extending transverse inner surfaces 73, 74 of each divergence space segment 7 by the transverse limiting elements. 8 are formed.
  • the transverse limiting elements 8 may advantageously be formed as planar elements, which are inclined with respect to the vertical, for example, between 30 ° and 60 ° inclined oriented oriented manufacturing technology.
  • the transverse limiting elements 8 are designed such that the transverse inner surfaces 73, 74 formed by them extend up to the upper edges of those main surfaces 332, 333, by which the relevant light-guiding unit 5 is limited in the longitudinal direction. In this way, it is possible to prevent a light emitted by the LED light sources 2, 2 'from striking a back surface 331 of a transverse lamella 33.
  • the transverse limiting elements 8 preferably extend up to the height of the relevant LED light source 2, 2 ', or to the LEDs 21, 22 of the relevant LED light source 2, 2'.
  • the optical element 6 preferably also has a concavely shaped channel-shaped, profiled carrier element 9 which extends parallel to the longitudinal axis L , wherein a further part of the inner surfaces namely two longitudinal inner surfaces 71, 72 of each extending longitudinally to the longitudinal axis L. Divergence space segment 7 is formed by the support member 9.
  • the optical element 6 can be advantageously designed as a stable unit.
  • the transverse boundary elements 8 and / or the LED light sources 2, 2 ' are preferably arranged supported on the carrier element 9.
  • the at least one circuit board 13 may be supported on the carrier element 9.
  • the carrier element 9 is formed from one piece, so that manufacturing technology advantageously the two longitudinal inner surfaces 71, 72 of all divergence space segments 7 are formed by only one component.
  • the support element 8 is preferably designed such that it extends on two opposite sides to side reflectors 31, 32 out.
  • the design is such that the side reflectors 31, 32 extend further upward than the transverse lamellae 33.
  • the design is furthermore preferably such that the optical element 6 is in a state separated from the raster element 3 relative to the latter Raster element 3 parallel to the longitudinal axis L of the two side reflectors 31, 32 can be guided.
  • the side reflectors 31, 32 in this case form, as it were, a guide rail for the optical element 6.
  • the light source of the grid lamp to be replaced.
  • a corresponding grid lamp which has a traditional fluorescent tube as the light source
  • it can be replaced particularly easily by a corresponding module comprising the optical element 6 and the LED light sources 2, 2 '.
  • the module thus formed can be easily inserted into the front side of the raster element 3 and then connect electrically accordingly.
  • the module may in particular consist of the grid element 6 and the LED light sources 2, 2 '.
  • the optical element 6 also has a diffuser element 11, which is arranged optically effectively between the LED light sources 2, 2 'and the light guide units 5.
  • the diffuser element 11 is concavely curved with respect to a, the LED light sources 2, 2 'side facing.
  • the light emitted by the LED light sources 2, 2 ' can be distributed by the diffuser element 11 in such a way that it is more homogeneously distributed from the outside when viewed in terms of color mixing, glare and the risk of multiple shading appears on the work surfaces.
  • Fig. 5 shows a sketched view obliquely from below into a light guide unit 5 of the raster element 3, with a view of the diffuser element eleventh
  • the diffuser element 11 may be formed in the form of a diffuser film.
  • the diffuser element 11 is supported on the carrier element 9. Further preferably, the diffuser element 11 consists of one piece.
  • LED light sources of different designs can be introduced into the divergence space segments 7 in a particularly flexible manner.
  • the diffuser element 11 can be particularly advantageous from different types of diffuser elements select.
  • a raster lamp according to the invention is particularly suitable as a lamp that can deliver a high amount of light, in particular as a workstation-compatible lamp with a small light exit surface, so that ausblendende reflectors are required in multiple arrangements or a light grid.

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

Description

Die Erfindung betrifft eine Rasterleuchte mit LED-Lichtquellen (LED: Licht emittierende Diode).The invention relates to a grid lamp with LED light sources (LED: light-emitting diode).

Rasterleuchten sind als solche aus dem Stand der Technik bekannt. Beispielsweise zeigt die DE 195 20 177 A1 eine längliche Rasterleuchte, bei der das Rasterelement zwei Seitenreflektoren aufweist, die sich in Längsrichtung der Leuchte erstrecken, sowie mehrere Querlamellen, die sich quer zur Längsrichtung zwischen den beiden Seitenreflektoren erstrecken. Bei dieser Rasterleuchte ist als Lichtquelle eine Leuchtstoffröhre vorgesehen.Grid lights are known as such from the prior art. For example, the shows DE 195 20 177 A1 an elongated grid lamp in which the grid element has two side reflectors extending in the longitudinal direction of the lamp, and a plurality of transverse blades which extend transversely to the longitudinal direction between the two side reflectors. In this raster lamp, a fluorescent tube is provided as a light source.

Zwischenzeitlich ist bereits eine Rasterleuchte auf LED-Basis bekannt. Aus der DE 10 2010 062 454 A1 ist eine solche Leuchte mit einem Zellenrasterelement bekannt, das mehrere Topfreflektoren bildet, wobei jedem Topfreflektor eine LED zugeordnet ist.In the meantime, an LED-based louvre luminaire is already known. From the DE 10 2010 062 454 A1 Such a luminaire is known with a cell grid element which forms a plurality of pot reflectors, wherein each top reflector is associated with an LED.

Insbesondere, wenn man bei einer Rasterleuchte, die als Lichtquelle eine klassische Leuchtstoffröhre aufweist, die Leuchtstoffröhre durch eine Lichtquelle auf LED-Basis ersetzt, ergibt sich das Problem, dass das von den LEDs abgegebene Licht zu einem erheblichen Anteil nicht aus der Leuchte heraus strahlt, sondern an Strukturen der Rasterleuchte, insbesondere an den Rückenflächen der Querlamellen des Rasterelements, die zu der Seite der LEDs hin weisen, reflektiert oder absorbiert wird und in der Folge nicht mehr zur Lichtabgabe der Leuchte zur Verfügung steht. Mit anderen Worten ist die Effizienz der Lichtabgabe hierbei eingeschränkt.In particular, if one replaces the fluorescent tube with a light source based on LED in a raster lamp, which has a conventional fluorescent tube as light source, there is the problem that the light emitted by the LEDs does not radiate to a considerable extent out of the light, but to structures of the grid lamp, in particular on the back surfaces of the transverse lamellae of the grid element, which point towards the side of the LEDs, is reflected or absorbed and is no longer available to the light output of the lamp in the sequence. In other words, the efficiency of the light output is limited.

Der Erfindung liegt die Aufgabe zugrunde, eine entsprechende verbesserte Rasterleuchte auf LED-Basis anzugeben; insbesondere soll die Rasterleuchte eine verbesserte Effizienz aufweisen.The invention has for its object to provide a corresponding improved LED-based grid lamp; In particular, the louver should have improved efficiency.

Aus der JP 2010-118189 A ist eine LED-Rasterleuchte mit Quer-Reflektorelementen bekannt, bei der das Licht der LEDs jeweils zwischen zwei der Quer-Reflektorelemente eingestrahlt wird. Zwischen den LEDs und den Quer-Reflektorelementen sind jeweils Linsen zur Lichtbündelung angeordnet.From the JP 2010-118189 A an LED grid lamp with transverse reflector elements is known, in which the light of the LEDs is in each case irradiated between two of the transverse reflector elements. Lens for light bundling are arranged between the LEDs and the transverse reflector elements.

Eine weitere LED-Rasterleuchte ist aus der US 2009/0323328 A1 bekannt. Bei dieser Leuchte durchsetzt das von einer LED abgestrahlte Licht zunächst ein trichterartiges Rasterelement; anschließend wird es teilweise durch ein längliches Reflektorelement abgelenkt, so dass insgesamt ein breiter Bereich beleuchtet wird.Another LED grid is from the US 2009/0323328 A1 known. In this luminaire, the light emitted by an LED initially passes through a funnel-like grid element; then it is partially deflected by an elongated reflector element, so that a total of a broad area is illuminated.

Diese Aufgabe wird gemäß der Erfindung mit dem in dem unabhängigen Anspruch genannten Gegenstand gelöst. Besondere Ausführungsarten der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved according to the invention with the object mentioned in the independent claim. Particular embodiments of the invention are indicated in the dependent claims.

Gemäß der Erfindung ist eine Rasterleuchte vorgesehen, die wenigstens zwei LED-Lichtquellen aufweist, sowie ein Rasterelement, das sich längs einer Längsachse erstreckt, wobei das Rasterelement wenigstens drei Quer-Reflektorelemente aufweist, die sich quer zur Längsachse erstrecken und wobei durch zwei benachbarte Quer-Reflektorelemente jeweils eine Lichtlenkeinheit des Rasterelements begrenzt ist. Dabei ist die Rasterleuchte derart gestaltet, dass jede der LED-Lichtquellen jeweils einer der Lichtlenkeinheiten zugeordnet ist. Weiterhin weist die Rasterleuchte ein optisches Element auf, das unabhängig von dem Rasterelement ausgebildet ist und das derart ausgestaltet und angeordnet ist, dass es optisch zwischen den wenigstens zwei LED-Lichtquellen und den Lichtlenkeinheiten wirkt.According to the invention, a grid lamp is provided which has at least two LED light sources, and a grid element which extends along a longitudinal axis, wherein the grid element has at least three transverse reflector elements which extend transversely to the longitudinal axis and by two adjacent transverse Reflector elements each have a Lichtlenkeinheit the raster element is limited. In this case, the grid lamp is designed such that each of the LED light sources is assigned to one of the light guide units. Furthermore, the grid lamp has an optical element which is formed independently of the grid element and which is configured and arranged such that it acts optically between the at least two LED light sources and the light guide units.

Durch das optische Element lässt sich erzielen, dass das von den LED-Lichtquellen abgegebene Licht besonders gezielt den jeweiligen Lichtlenkeinheiten zugeleitet wird. Hierdurch lässt sich die Effizienz der Lichtabgabe der Rasterleuchte steigern.The optical element makes it possible to achieve that the light emitted by the LED light sources is directed in a particularly targeted manner to the respective light-directing units. This can increase the efficiency of the light output of the grid lamp.

Vorzugsweise weist das Rasterelement zwei, sich längs der Längsachse erstreckende Seitenreflektoren auf, wobei die Quer-Reflektorelemente durch Querlamellen gebildet sind, die die beiden Seitenreflektoren verbindend angeordnet sind. Hierbei lässt sich mit dem optischen Element insbesondere verhindern, dass ein, von einer der LED-Lichtquellen abgegebenes Licht auf eine, zu der betreffenden LED-Lichtquelle hin weisende Rückenfläche einer Querlamelle trifft. Das Licht kann somit besonders effektiv zur Lichtabgabe der Rasterleuchte genutzt werden.Preferably, the grid element has two, on the longitudinal axis extending side reflectors, wherein the transverse reflector elements are formed by cross blades, which are arranged connecting the two side reflectors. In this case, it can be prevented in particular with the optical element that a light emitted by one of the LED light sources strikes a back surface of a transverse lamella pointing towards the relevant LED light source. The light can thus be used particularly effectively for the light output of the grid light.

Erfindungsgemäß weist das optische Element wenigstens zwei Divergenz-Raumsegmente auf, wobei jedes der Divergenz-Raumsegmente durch Innenflächen begrenzt ist, die sich jeweils zwischen einer der LED-Lichtquellen und der, der betreffenden LED-Lichtquelle zugeordneten Lichtlenkeinheit divergierend erstrecken. Hierdurch lässt sich erzielen, dass ein, von einer LED-Lichtquelle abgestrahltes Licht mit besonders geringem Verlust der zugeordneten Lichtlenkeinheit zugeführt wird. Vorzugsweise sind dabei die Innenflächen zumindest teilweise reflektierend gestaltet. Ein Lichtverlust zwischen den LED-Lichtquellen und den Lichtlenkeinheiten lässt sich hierdurch besonders gering halten.According to the invention, the optical element has at least two divergence space segments, wherein each of the divergence space segments is bounded by inner surfaces which extend divergently between one of the LED light sources and the light guide unit associated with the respective LED light source. This makes it possible to achieve that a light emitted by an LED light source is supplied to the associated light-directing unit with a particularly low loss. Preferably, the inner surfaces are designed at least partially reflective. A loss of light between the LED light sources and the light guide units can thereby be kept very low.

Vorzugsweise weist das optische Element Querbegrenzungselemente auf, die sich quer zur Längsachse erstrecken, wobei ein Teil der Innenflächen eines jeden Divergenz-Raumsegments durch die Querbegrenzungselemente gebildet ist.Preferably, the optical element has transverse limiting elements which extend transversely to the longitudinal axis, wherein a part of the inner surfaces of each divergence space segment is formed by the transverse limiting elements.

Erfindungsgemäß weist das optische Element ein konkav gewölbtes bzw. rinnenförmiges, profilartig gebildetes Trägerelement auf, das sich parallel zu der Längsachse erstreckt, wobei ein weiterer Teil der Innenflächen eines jeden Divergenz-Raumsegments durch das Trägerelement gebildet ist. Durch das profilartige Trägerelement lassen sich herstellungstechnisch vorteilhaft seitliche Innenwände der Divergenz-Raumsegmente bilden. Außerdem lässt sich durch das Trägerelement einfach erzielen, dass die Divergenz-Raumsegmente mechanisch zusammengehalten werden, so dass das optische Element insgesamt als eine, in sich stabile Baueinheit ausgebildet sein kann. Hierdurch ist eine Handhabung der Rasterleuchte erleichtert, insbesondere mit Bezug auf eine Montage oder einen Austausch der Lichtquelle.According to the invention, the optical element has a concavely curved or trough-shaped, profile-like formed carrier element which extends parallel to the longitudinal axis, wherein a further part of the inner surfaces of each divergence space segment is formed by the carrier element. By virtue of the profile-like carrier element, it is advantageously possible to form production side walls of the divergence space segments. In addition, it can be easily achieved by the carrier element that the divergence space segments are held together mechanically, so that the optical element as a whole, in itself stable unit can be formed. As a result, handling of the grid lamp is facilitated, in particular with respect to a mounting or replacement of the light source.

Vorzugsweise sind die wenigstens zwei LED-Lichtquellen an dem Trägerelement gehaltert angeordnet. Hierdurch lässt sich ein gesondertes Halteelement für die LED-Lichtquellen einsparen.Preferably, the at least two LED light sources are arranged supported on the carrier element. This makes it possible to save a separate holding element for the LED light sources.

Vorzugsweise ist die Rasterleuchte derart gestaltet, dass sich das Trägerelement in einem Querschnitt betrachtet an zwei gegenüberliegenden Seiten bis zu den beiden Seitenreflektoren hin erstreckt. Hierdurch lässt sich erzielen, dass sich bei der Montage der Rasterleuchte das optische Element besonders einfach in eine vorgesehene Relativposition zu dem Rasterelement bringen lässt. Weiterhin vorzugsweise sind dabei das Rasterelement und das optische Element derart gestaltet, dass sich das optische Element in einem, von dem Rasterelement separierten Zustand relativ zu dem Rasterelement parallel zu der Längsachse von den beiden Seitenreflektoren geführt bewegen lässt. Hierdurch lässt sich insbesondere erzielen, dass zum Zusammenbau das optische Element von einer Stirnseite her in das Rasterelement geführt eingeschoben werden kann.Preferably, the grid lamp is designed such that viewed in a cross section, the carrier element extends on two opposite sides up to the two side reflectors. In this way, it can be achieved that the optical element can be brought into the intended position in a relative position relative to the grid element particularly easily during the assembly of the grid lamp. Further preferably, the raster element and the optical element are designed such that the optical element can be guided in a separated state from the raster element relative to the raster element parallel to the longitudinal axis guided by the two side reflectors. This can be achieved in particular that for the assembly optical element can be inserted guided from one end side into the grid element.

Vorzugsweise weist das optische Element weiterhin ein Diffusor-Element auf, das optisch wirksam zwischen den LED-Lichtquellen und den Lichtlenkeinheiten angeordnet ist. Hierdurch lässt sich erzielen, dass bei Betrachtung der Rasterleuchte von außen das von den LED-Lichtquellen quasi in Form von Punkten abgegebene Licht gleichmäßiger verteilt erscheint, insbesondere wenn das Diffusor-Element dabei mit Bezug auf eine, den LED-Lichtquellen zugewandten Seite, konkav gewölbt ist. Vorzugsweise ist hierzu das Diffusor-Element eine Folie. Das Diffusor-Element kann auch durch ein diffuses bzw. durch Strukturierung streuendes Extrusionsprofil gebildet sein.Preferably, the optical element further comprises a diffuser element optically operatively disposed between the LED light sources and the light directing units. In this way, it can be achieved that the light emitted by the LED light sources quasi in the form of dots appears to be distributed more uniformly when viewing the grid light, in particular when the diffuser element is concavely curved with respect to a side facing the LED light sources is. Preferably, for this purpose, the diffuser element is a film. The diffuser element may also be formed by a diffusing or by structuring scattering extrusion profile.

Darüber hinaus besteht durch diesen Aufbau die Möglichkeit, ohne markante Veränderungen der Abstrahlcharakteristik LEDs auszutauschen, wenn dies aus Kosten- oder Effizienzgründen sinnvoll erscheint.In addition, this structure makes it possible to replace LEDs without significant changes in the emission characteristics, if this makes sense for reasons of cost or efficiency.

Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels und mit Bezug auf die Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine perspektivische Skizze zu einem Rasterelement und einem optischen Element einer erfindungsgemäßen Rasterleuchte,
Fig. 2
einen Querschnitt durch die Rasterleuchte,
Fig. 3
einen Längsschnitt durch einen Längsabschnitt der Rasterleuchte,
Fig. 4
eine der Fig. 1 entsprechende Skizze von schräg oben und
Fig. 5
eine Skizze einer Sicht von schräg unten in eine Lichtlenkeinheit des Rasterelements, mit Blick auf das Diffusor-Element
The invention is explained in more detail below with reference to an embodiment and with reference to the drawings. Show it:
Fig. 1
a perspective sketch of a grid element and an optical element of a grid lamp according to the invention,
Fig. 2
a cross section through the grid lamp,
Fig. 3
a longitudinal section through a longitudinal portion of the grid lamp,
Fig. 4
one of the Fig. 1 corresponding sketch from diagonally above and
Fig. 5
a sketch of a view obliquely from below into a Lichtlenkeinheit the grid element, overlooking the diffuser element

Fig. 1 zeigt eine perspektivische Skizze zu einem Rasterelement 3 und einem optischen Element 6 einer erfindungsgemäßen Leuchte. Das Rasterelement 3 ist insgesamt länglich und erstreckt sich längs einer Längsachse L. In Fig. 1 ist lediglich ein Teil des Rasterelements 3 skizziert, und zwar mit Bezug auf die Längsachse L lediglich ein Längsabschnitt des Rasterelements 3. Analoges gilt für die Darstellung des optischen Elements 6. Fig. 1 shows a perspective sketch of a raster element 3 and an optical element 6 of a lamp according to the invention. The grid element 3 is elongate overall and extends along a longitudinal axis L. In Fig. 1 only a part of the raster element 3 is sketched, specifically with respect to the longitudinal axis L, only a longitudinal section of the raster element 3. Analogously applies to the representation of the optical element 6.

In Fig. 2 ist in einem Schnitt normal zu der Längsachse L bzw. in einem Querschnitt die Rasterleuchte skizziert. Die Rasterleuchte kann insbesondere ein Leuchtengehäuse 10 aufweisen, in dem das Rasterelement 3 angeordnet ist, wobei vorzugsweise auch das Leuchtengehäuse 10 bzw. die gesamte Rasterleuchte länglich ist und sich längs der Längsachse L erstreckt. Bei der Rasterleuchte kann es sich um eine Einbauleuchte, insbesondere um eine Deckeneinbauleuchte handeln.In Fig. 2 is in a section normal to the longitudinal axis L or sketched in a cross section of the grid lamp. In particular, the louvre luminaire may have a luminaire housing 10 in which the grid element 3 is arranged, wherein preferably also the luminaire housing 10 or the entire grid light is oblong and extends along the longitudinal axis L. The grid lamp may be a recessed luminaire, in particular a recessed ceiling luminaire.

In Fig. 3 ist einen Längsschnitt durch einen Längsabschnitt der Rasterleuchte skizziert. Als Lichtquelle weist die Rasterleuchte wenigstens zwei LED-Lichtquellen 2, 2' auf. Die Rasterleuchte ist derart gestaltet, dass ein von den LED-Lichtquellen 2, 2' abgestrahltes Licht die Leuchte verlässt, und zwar insbesondere durch eine im Leuchtengehäuse 10 ausgebildete Lichtaustrittsöffnung 12 der Rasterleuchte.In Fig. 3 is a longitudinal section through a longitudinal portion of the grid lamp sketched. As a light source, the grid lamp at least two LED light sources 2, 2 'on. The raster lamp is designed in such a way that a light emitted by the LED light sources 2, 2 'leaves the luminaire, in particular by a light exit opening 12 of the raster lamp formed in the luminaire housing 10.

In der vorliegenden Beschreibung wird davon ausgegangen, dass die Rasterleuchte derart relativ zur Vertikalen orientiert ist, dass eine Abgabe des Lichts nach unten vorgesehen ist, also die Lichtaustrittsöffnung 12 des Leuchtengehäuses 10 nach unten weist, wie in den Figuren 1 bis 3 durch einen Pfeil u angedeutet. Grundsätzlich kann die Rasterleuchte auch anders orientiert vorgesehen sein. In einem solchen Fall sind die Richtungsangaben etc. entsprechend umzudeuten.In the present description, it is assumed that the grid lamp is oriented relative to the vertical, that a discharge of the light is provided downward, so the light exit opening 12 of the lamp housing 10 facing downward, as in the FIGS. 1 to 3 indicated by an arrow u . In principle, the grid lamp can also be provided differently oriented. In such a case, the directions etc. are to be reinterpreted accordingly.

Wie in Fig. 1 gezeigt, weist das Rasterelement 3 Quer-Reflektorelemente 4 auf, die sich quer zur Längsachse L erstrecken, wobei durch zwei benachbarte Quer-Reflektorelemente 4 jeweils eine Lichtlenkeinheit 5 des Rasterelements 3 begrenzt ist. Insgesamt weist das Rasterelement 3 wenigstens drei Quer-Reflektorelemente 4 auf, so dass mindestens zwei Lichtlenkeinheiten 5 gebildet sind. Vorzugsweise allerdings sind deutlich mehr Quer-Reflektorelemente 4 bzw. Lichtlenkeinheiten 5 vorgesehen, beispielsweise mindestens sechs oder mindestens zehn Lichtlenkeinheiten 5, die in einer Reihe entlang der Längsachse L ausgebildet sind.As in Fig. 1 shown, the grid element 3 on transverse reflector elements 4, which extend transversely to the longitudinal axis L , wherein two adjacent transverse reflector elements 4 each have a Lichtlenkeinheit 5 of the raster element 3 is limited. Overall, the grid element 3 has at least three transverse reflector elements 4, so that at least two light guide units 5 are formed. Preferably, however, significantly more transverse reflector elements 4 or light-guiding units 5 are provided, For example, at least six or at least ten Lichtlenkeinheiten 5, which are formed in a row along the longitudinal axis L.

Der in Fig. 3 skizzierte Längsabschnitt der Rasterleuchte umfasst drei Lichtlenkeinheiten 5.The in Fig. 3 sketched longitudinal section of the grid lamp comprises three light guide units. 5

Der Abstand zwischen zwei Quer-Reflektorelementen 4 entlang der Längsachse L kann beispielsweise zwischen 30 mm und 100 mm betragen, vorzugsweise zwischen 40 mm und 80 mm.The distance between two transverse reflector elements 4 along the longitudinal axis L may for example be between 30 mm and 100 mm, preferably between 40 mm and 80 mm.

Die Rasterleuchte ist so gestaltet, dass jede der LED-Lichtquellen 2, 2'jeweils genau einer der Lichtlenkeinheiten 5 zugeordnet ist. Wie in dem in Fig. 2 gezeigten Querschnitt angedeutet, kann dabei eine LED-Lichtquelle 2 wenigstens zwei LEDs 21, 22 umfassen, die insbesondere auf wenigstens einer Platine 13 angeordnet sind.The raster lamp is designed so that each of the LED light sources 2, 2 'is assigned to exactly one of the light-guiding units 5. As in the in Fig. 2 shown cross-section, while an LED light source 2, at least two LEDs 21, 22 include, which are arranged in particular on at least one circuit board 13.

Jede Lichtlenkeinheit 5 ist vorzugsweise in einem Horizontalschnitt ringförmig geschlossen ausgebildet, so dass aufgrund der Ringform eine Lichteintrittsöffnung bzw. obere Öffnung der Lichtlenkeinheit 5 ausgebildet ist und eine Lichtaustrittsöffnung bzw. untere Öffnung. Dabei ist die Gestaltung derart, dass ein von der betreffenden LED-Lichtquelle 2, 2' abgestrahltes Licht durch die Lichteintrittsöffnung der Lichtlenkeinheit 5 in Letztere eintritt und durch die Lichtaustrittsöffnung wieder austritt und in der Folge die Rasterleuchte in einen Außenraum verlässt.Each light guide unit 5 is preferably designed to be closed annularly in a horizontal section, so that a light inlet opening or upper opening of the light guide unit 5 is formed due to the ring shape and a light exit opening or lower opening. The design is such that one of the LED light source 2, 2 'radiated light enters through the light inlet opening of the light guide unit 5 in the latter and exits through the light exit opening again and leaves the raster lamp in an outer space.

Im gezeigten Beispiel weist das Rasterelement 3 zwei, sich längs der Längsachse L erstreckende Seitenreflektoren 31, 32 auf und die Quer-Reflektorelemente 4 sind durch Querlamellen 33 gebildet, die die beiden Seitenreflektoren 31, 32 verbindend angeordnet sind. Ein derartiges Rasterelement 3 ist als solches aus dem Stand der Technik bekannt. In Fig. 4 ist eine der Fig. 1 entsprechende perspektivische Skizze bei Sicht von schräg oben skizziert. Man erkennt, dass die Querlamellen 33 an ihrer zu den LED-Lichtquellen 2, 2' hin weisenden Seite bzw. auf ihrer nach oben weisenden Seite eine Rückenfläche 331 aufweisen und - wie in Fig. 3 angedeutet - jeweils zwei Hauptflächen 332, 333. Jede Lichtlenkeinheit 5 ist somit durch eine Hauptfläche 332 einer ersten Querlamelle und eine Hauptfläche 333 einer zu der ersten Querlamelle benachbarten, zweiten Querlamelle in Längsrichtung begrenzt.In the example shown, the grid element 3 has two, along the longitudinal axis L extending side reflectors 31, 32 and the transverse reflector elements 4 are formed by transverse lamellae 33 which are arranged connecting the two side reflectors 31, 32. Such a raster element 3 is known as such from the prior art. In Fig. 4 is one of the Fig. 1 corresponding perspective sketch outlined at an angle from above. It can be seen that the transverse lamellae 33 have a back surface 331 on their side pointing toward the LED light sources 2, 2 'or on their upward-pointing side, and - as in FIG Fig. 3 indicated - two main surfaces 332, 333. Each light guide unit 5 is thus through a main surface 332nd a first transverse lamella and a main surface 333 of an adjacent to the first transverse lamella, second transverse lamella bounded in the longitudinal direction.

Die Rasterleuchte weist weiterhin ein optisches Element 6 auf, das unabhängig von dem Rasterelement 3 ausgebildet ist und das derart ausgestaltet und angeordnet ist, dass es optisch zwischen den LED-Lichtquellen 2, 2 und den Lichtlenkeinheiten 5 wirkt. Hierdurch lässt sich ein von den LED-Lichtquellen 2, 2' abgestrahltes Licht besonders effektiv den jeweiligen Lichtlenkeinheiten 5 zuführen, so dass die Effizienz der Rasterleuchte gesteigert ist. Insbesondere ist hierzu das optische Element 6 derart gestaltet, dass ein von einer der LED-Lichtquellen 2, 2' abgestrahltes Licht lediglich in das, der betreffenden LED-Lichtquelle 2, 2' zugeordnete Lichtlenkelement 5 eingestrahlt wird.The raster lamp further comprises an optical element 6, which is formed independently of the raster element 3 and which is configured and arranged such that it acts optically between the LED light sources 2, 2 and the light guide units 5. As a result, a light emitted by the LED light sources 2, 2 'can be supplied to the respective light guide units 5 in a particularly effective manner, so that the efficiency of the grid light is increased. In particular, for this purpose, the optical element 6 is designed such that a of one of the LED light sources 2, 2 'emitted light is only in the, the relevant LED light source 2, 2' associated light-deflecting element 5 is irradiated.

Insbesondere kann das optische Element 6 Divergenz-Raumsegmente 7 aufweisen, wobei vorzugsweise jedes der Divergenz-Raumsegmente 7 genau einer der LED-Lichtquellen 2, 2' zugeordnet ist. Jedes Divergenz-Raumsegment 7 ist durch Innenflächen 71, 72, 73, 74 begrenzt, die sich zwischen der betreffenden LED-Lichtquelle 2, 2' und der jeweils entsprechend zugeordneten Lichtlenkeinheit 5 divergierend erstrecken. Die Divergenz-Raumsegmente 7 können also quasi trichterförmig gestaltet sein, wobei eine LED-Lichtquelle 2, 2' an bzw. in der kleineren bzw. oberen Trichteröffnung angeordnet ist und die größere bzw. untere Trichteröffnung zu der betreffenden Lichtlenkeinheit 5 hin weist. Vorzugsweise ist die größere Trichteröffnung derart gestaltet, dass sie in ihrer Form und Größe der oberen Öffnung bzw. Lichteintrittsöffnung der betreffenden Lichtlenkeinheit 5 entspricht. Auf diese Weise lässt sich erzielen, dass besonders wenig Licht der LED-Lichtquelle 2, 2 für die Abstrahlung der Rasterleuchte verloren geht.In particular, the optical element 6 may have divergence space segments 7, wherein preferably each of the divergence space segments 7 is assigned to exactly one of the LED light sources 2, 2 '. Each divergence space segment 7 is bounded by inner surfaces 71, 72, 73, 74, which extend divergently between the respective LED light source 2, 2 'and the respectively associated light guide unit 5. The divergence space segments 7 can thus be designed quasi funnel-shaped, wherein an LED light source 2, 2 'is arranged on or in the smaller or upper funnel opening and the larger or lower funnel opening to the relevant light guide unit 5 points. Preferably, the larger funnel opening is designed such that it corresponds in shape and size of the upper opening or light inlet opening of the relevant light guide unit 5. In this way it can be achieved that particularly little light of the LED light source 2, 2 is lost for the radiation of the raster lamp.

Insbesondere können durch die Divergenz-Raumsegmente 7 Lichtmischkammern bzw. Lichtkammern gebildet sein.In particular, light mixing chambers or light chambers can be formed by the divergence space segments 7.

Besonders wenig Licht geht verloren, wenn die Innenflächen 71, 72, 73, 74 zumindest teilweise reflektierend, insbesondere hochreflektierend gestaltet sind. Vorzugsweise sind alle Innenflächen 71, 72, 73, 74 reflektierend gestaltet. Die Innenwände 71, 72, 73, 74 können hierzu beispielsweise weiß gestaltet sein oder als reflektierende Aluminiumflächen.Particularly little light is lost if the inner surfaces 71, 72, 73, 74 are designed to be at least partially reflective, in particular highly reflective. Preferably, all inner surfaces 71, 72, 73, 74 are designed reflecting. The inner walls 71, 72, 73, 74 may be designed for this purpose, for example, white or as reflective aluminum surfaces.

Wie beispielsweise in Fig. 3 exemplarisch gezeigt, weist das optische Element 6 weiterhin vorzugsweise Querbegrenzungselemente 8 auf, die sich quer zur Längsachse L erstrecken, wobei ein Teil der Innenflächen, nämlich zwei quer zur Längsachse verlaufende Quer-Innenflächen 73, 74 eines jeden Divergenz-Raumsegments 7 durch die Querbegrenzungselemente 8 gebildet sind. Die Querbegrenzungselemente 8 können herstellungstechnisch vorteilhaft als plane Elemente ausgebildet sein, die mit Bezug auf die Vertikale geneigt, beispielsweise zwischen 30° und 60° geneigt orientiert angeordnet sind. Vorzugsweise sind die Querbegrenzungselemente 8 derart gestaltet, dass sich die durch sie gebildeten Quer-Innenflächen 73, 74 bis zu den Oberkanten derjenigen Hauptflächen 332, 333 erstrecken, durch die die betreffende Lichtlenkeinheit 5 in Längsrichtung begrenzt ist. Auf diese Weise lässt sich verhindern, dass ein von den LED-Lichtquellen 2, 2' abgestrahltes Licht auf eine Rückenfläche 331 einer Querlamelle 33 trifft.Such as in Fig. 3 By way of example, the optical element 6 preferably further comprises transverse limiting elements 8 which extend transversely to the longitudinal axis L , wherein a part of the inner surfaces, namely two transversely to the longitudinal axis extending transverse inner surfaces 73, 74 of each divergence space segment 7 by the transverse limiting elements. 8 are formed. The transverse limiting elements 8 may advantageously be formed as planar elements, which are inclined with respect to the vertical, for example, between 30 ° and 60 ° inclined oriented oriented manufacturing technology. Preferably, the transverse limiting elements 8 are designed such that the transverse inner surfaces 73, 74 formed by them extend up to the upper edges of those main surfaces 332, 333, by which the relevant light-guiding unit 5 is limited in the longitudinal direction. In this way, it is possible to prevent a light emitted by the LED light sources 2, 2 'from striking a back surface 331 of a transverse lamella 33.

Nach oben hin erstrecken sich die Querbegrenzungselemente 8 vorzugsweise bis auf die Höhe der betreffenden LED-Lichtquelle 2, 2', bzw. zu den LEDs 21, 22 der betreffenden LED-Lichtquelle 2, 2'.At the top, the transverse limiting elements 8 preferably extend up to the height of the relevant LED light source 2, 2 ', or to the LEDs 21, 22 of the relevant LED light source 2, 2'.

Das optische Element 6 weist vorzugsweise außerdem ein konkav gewölbtes bzw. rinnenförmiges, profilartig gebildetes Trägerelement 9 auf, das sich parallel zu der Längsachse L erstreckt, wobei ein weiterer Teil der Innenflächen nämlich zwei längs zur Längsachse L verlaufende Längs-Innenflächen 71, 72 eines jeden Divergenz-Raumsegments 7 durch das Trägerelement 9 gebildet ist. Durch das Trägerelement 9 lässt sich das optische Element 6 vorteilhaft als stabile Baueinheit gestalten. Hierzu sind die Querbegrenzungselemente 8 und/oder die LED-Lichtquellen 2, 2' vorzugsweise an dem Trägerelement 9 gehaltert angeordnet. Insbesondere kann die wenigstens eine Platine 13 an dem Trägerelement 9 gehaltert sein. Vorzugsweise ist das Trägerelement 9 aus einem Stück bestehend gebildet, so dass herstellungstechnisch vorteilhaft die beiden Längs-Innenflächen 71, 72 aller Divergenz-Raumsegmente 7 durch lediglich ein Bauteil gebildet sind.The optical element 6 preferably also has a concavely shaped channel-shaped, profiled carrier element 9 which extends parallel to the longitudinal axis L , wherein a further part of the inner surfaces namely two longitudinal inner surfaces 71, 72 of each extending longitudinally to the longitudinal axis L. Divergence space segment 7 is formed by the support member 9. By the support member 9, the optical element 6 can be advantageously designed as a stable unit. For this purpose, the transverse boundary elements 8 and / or the LED light sources 2, 2 'are preferably arranged supported on the carrier element 9. In particular, the at least one circuit board 13 may be supported on the carrier element 9. Preferably, the carrier element 9 is formed from one piece, so that manufacturing technology advantageously the two longitudinal inner surfaces 71, 72 of all divergence space segments 7 are formed by only one component.

Wie aus Fig. 2 exemplarisch hervorgeht, ist das Trägerelement 8 vorzugsweise derart gestaltet, dass es sich an zwei gegenüberliegenden Seiten bis zu Seitenreflektoren 31, 32 hin erstreckt. Im gezeigten Beispiel ist die Gestaltung derart, dass sich die Seitenreflektoren 31, 32 weiter nach oben erstrecken als die Querlamellen 33. Die Gestaltung ist dabei weiterhin vorzugsweise derart, dass sich das optische Element 6 in einem, von dem Rasterelement 3 separierten Zustand relativ zu dem Rasterelement 3 parallel zu der Längsachse L von den beiden Seitenreflektoren 31, 32 geführt bewegen lässt. Die Seitenreflektoren 31, 32 bilden in diesem Fall sozusagen eine Führungsschiene für das optische Element 6.How out Fig. 2 As an example, the support element 8 is preferably designed such that it extends on two opposite sides to side reflectors 31, 32 out. In the example shown, the design is such that the side reflectors 31, 32 extend further upward than the transverse lamellae 33. The design is furthermore preferably such that the optical element 6 is in a state separated from the raster element 3 relative to the latter Raster element 3 parallel to the longitudinal axis L of the two side reflectors 31, 32 can be guided. The side reflectors 31, 32 in this case form, as it were, a guide rail for the optical element 6.

Dies ist beispielsweise von besonderem Vorteil, wenn die Lichtquelle der Rasterleuchte ausgetauscht werden soll. Insbesondere kann bei einer entsprechenden Rasterleuchte, die als Lichtquelle eine traditionelle Leuchtstoffröhre aufweist, diese durch ein entsprechendes Modul, umfassend das optische Element 6 und die LED-Lichtquellen 2, 2' besonders einfach ersetzt werden. Das so gebildete Modul lässt sich dabei einfach stirnseitig in das Rasterelement 3 einschieben und anschließend entsprechend elektrisch anbinden. Das Modul kann dabei insbesondere aus dem Rasterelement 6 und dem LED-Lichtquellen 2, 2' bestehen.This is for example of particular advantage when the light source of the grid lamp to be replaced. In particular, in the case of a corresponding grid lamp which has a traditional fluorescent tube as the light source, it can be replaced particularly easily by a corresponding module comprising the optical element 6 and the LED light sources 2, 2 '. The module thus formed can be easily inserted into the front side of the raster element 3 and then connect electrically accordingly. The module may in particular consist of the grid element 6 and the LED light sources 2, 2 '.

Weiterhin vorzugsweise weist das optische Element 6 außerdem ein Diffusor-Element 11 auf, das optisch wirksam zwischen den LED-Lichtquellen 2, 2' und den Lichtlenkeinheiten 5 angeordnet ist. Vorzugsweise ist das Diffusor-Element 11 dabei mit Bezug auf eine, den LED-Lichtquellen 2, 2' zugewandten Seite, konkav gewölbt. Durch das Diffusor-Element 11 lässt sich das von den LED-Lichtquellen 2, 2' typischerweise quasi in Form von Punkten abgegebene Licht derart verteilen, dass es bei Betrachtung der Rasterleuchte von außen homogener verteilt hinsichtlich Farbdurchmischung, Blendwirkung und der Gefahr zur Bildung von Mehrfachverschattung an den Arbeitsflächen erscheint.Furthermore, preferably, the optical element 6 also has a diffuser element 11, which is arranged optically effectively between the LED light sources 2, 2 'and the light guide units 5. Preferably, the diffuser element 11 is concavely curved with respect to a, the LED light sources 2, 2 'side facing. The light emitted by the LED light sources 2, 2 ', typically quasi in the form of dots, can be distributed by the diffuser element 11 in such a way that it is more homogeneously distributed from the outside when viewed in terms of color mixing, glare and the risk of multiple shading appears on the work surfaces.

Fig. 5 zeigt eine skizzierte Ansicht von schräg unten in eine Lichtlenkeinheit 5 des Rasterelements 3, mit Blick auf das Diffusor-Element 11. Fig. 5 shows a sketched view obliquely from below into a light guide unit 5 of the raster element 3, with a view of the diffuser element eleventh

Das Diffusor-Element 11 kann in Form einer Diffusor-Folie gebildet sein. Vorzugsweise ist das Diffusor-Element 11 an dem Trägerelement 9 gehaltert. Weiterhin vorzugsweise besteht das Diffusor-Element 11 aus einem Stück.The diffuser element 11 may be formed in the form of a diffuser film. Preferably, the diffuser element 11 is supported on the carrier element 9. Further preferably, the diffuser element 11 consists of one piece.

Durch die Gestaltung des optischen Elements 6 lassen sich in die Divergenz-Raumsegmente 7 gestalterisch besonders flexibel LED-Lichtquellen unterschiedlicher Bauformen einbringen. Auch das Diffusor-Element 11 lässt sich besonders vorteilhaft aus unterschiedlich gearteten Diffusor-Elementen auswählen.Due to the design of the optical element 6, LED light sources of different designs can be introduced into the divergence space segments 7 in a particularly flexible manner. Also, the diffuser element 11 can be particularly advantageous from different types of diffuser elements select.

Eine erfindungsgemäße Rasterleuchte eignet sich insbesondere als Leuchte, die eine hohe Lichtmenge abgeben kann, insbesondere als Bildschirmarbeitsplatz-taugliche Leuchte mit kleiner Lichtaustrittsfläche, so dass ausblendende Reflektoren in mehrfacher Anordnung erforderlich sind bzw. ein Leuchtenraster.A raster lamp according to the invention is particularly suitable as a lamp that can deliver a high amount of light, in particular as a workstation-compatible lamp with a small light exit surface, so that ausblendende reflectors are required in multiple arrangements or a light grid.

Claims (10)

  1. Grid luminaire comprises
    - at least two LED light sources (2, 2'),
    - a grid element (3) extending along a longitudinal axis (L),
    wherein the grid element (3) has at least three transverse reflector elements (4) extending transversely to the longitudinal axis (L),
    wherein a light guiding unit (5) of the grid element (3) is respectively delimited by two adjacent transverse reflector elements (4),
    wherein the grid luminaire is so configured that each of the LED light sources (2, 2') is respectively associated with one of the light guide units (5),
    - an optical element (6) which is formed independently of the grid element (3),
    characterized in that
    the optical element (6) is so configured and arranged that it is optically effective between the at least two LED light sources (2, 2') and the light guide units (5),
    wherein the optical element (6) has at least two diverging space segments (7), wherein each of the diverging space segments (7) is delimited by inner surfaces (71, 72, 73, 74) respectively extending divergently between one of the LED light sources (2, 2') and the light guide unit (5) associated with the one LED light source in question (2, 2'),
    wherein the optical element (6) has a concavely arched or channel-shaped profile-like support member (9), which extends parallel to the longitudinal axis (L), wherein a further part of the inner surfaces (71, 72) of each diverging space segment (7) is formed by the support element (9).
  2. Grid luminaire according to claim 1,
    wherein the grid element (3) comprises two side reflectors (31, 32) extending along the longitudinal axis (L), while the transverse reflector elements (4) are formed by transverse slats (33) that connect the two side reflectors (31,32).
  3. Grid luminaire according to claim 1 or 2,
    wherein the inner surfaces (71, 72, 73, 74) are formed to be at least partially reflective.
  4. Grid light according to one of the preceding claims,
    wherein the optical element (6) comprises transverse delimiting elements (8) extending transversely to the longitudinal axis (L), wherein a part of the inner surfaces (73, 74) of each diverging space segment (7) is formed by the transverse delimiting elements (8).
  5. Grid luminaire according to any one of the preceding claims,
    wherein the at least two LED light sources (2, 2') are arranged mounted on the carrier element (9).
  6. Grid luminaire with the features mentioned in claim 2,
    wherein the carrier element (9) viewed in cross-section, extends outwards on two opposite sides to the two side reflectors (31, 32).
  7. Grid luminaire according to claim 6,
    wherein the grid element (3) and the optical element (6) are so designed that the optical element (6) in a location separated from the grid element (3) may be moved relative to the grid element (3) parallel to the longitudinal axis (L) away from the side reflectors (31, 32).
  8. Grid luminaire according to any one of the preceding claims,
    wherein the optical element (6) further comprises a diffuser element (11) which is arranged to be optically effective between the LED light sources (2, 2') and the light guide units (5).
  9. Grid luminaire according to claim 8,
    wherein the diffuser element (11) is concave with respect to a side facing the LED light sources (2, 2').
  10. Grid luminaire according to claim 8 or 9,
    wherein the diffuser element (11) is a film or an extrusion profile scattering diffusely through its structuring.
EP13760050.8A 2012-09-11 2013-09-11 Louver luminaire having led light sources Not-in-force EP2895790B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202012103452U DE202012103452U1 (en) 2012-09-11 2012-09-11 Grid lamp with LED light sources
PCT/EP2013/068796 WO2014041016A1 (en) 2012-09-11 2013-09-11 Louver luminaire having led light sources

Publications (2)

Publication Number Publication Date
EP2895790A1 EP2895790A1 (en) 2015-07-22
EP2895790B1 true EP2895790B1 (en) 2016-12-21

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Application Number Title Priority Date Filing Date
EP13760050.8A Not-in-force EP2895790B1 (en) 2012-09-11 2013-09-11 Louver luminaire having led light sources

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EP (1) EP2895790B1 (en)
CN (1) CN104603523A (en)
DE (1) DE202012103452U1 (en)
WO (1) WO2014041016A1 (en)

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DE102019111593A1 (en) * 2019-05-06 2020-11-12 Zumtobel Lighting Gmbh Elongated lamp
USD940946S1 (en) * 2019-09-19 2022-01-11 Changzhou Kaisen Photoelectricity Co., Ltd. LED light
CN210687896U (en) * 2019-09-30 2020-06-05 欧普照明股份有限公司 Light distribution assembly and lighting lamp
DE102020107728A1 (en) * 2020-03-20 2021-09-23 HELLA GmbH & Co. KGaA Lighting device for a vehicle

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Publication number Publication date
EP2895790A1 (en) 2015-07-22
CN104603523A (en) 2015-05-06
WO2014041016A1 (en) 2014-03-20
DE202012103452U1 (en) 2013-12-12

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