EP1275899B1 - Downlighter with lateral reflector - Google Patents

Downlighter with lateral reflector Download PDF

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Publication number
EP1275899B1
EP1275899B1 EP02014572A EP02014572A EP1275899B1 EP 1275899 B1 EP1275899 B1 EP 1275899B1 EP 02014572 A EP02014572 A EP 02014572A EP 02014572 A EP02014572 A EP 02014572A EP 1275899 B1 EP1275899 B1 EP 1275899B1
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EP
European Patent Office
Prior art keywords
reflector
reflector element
light
luminaire
light source
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.)
Expired - Lifetime
Application number
EP02014572A
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German (de)
French (fr)
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EP1275899A2 (en
EP1275899A3 (en
Inventor
Klaus Vamberszky
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
Original Assignee
Zumtobel Lighting GmbH Austria
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Publication of EP1275899A2 publication Critical patent/EP1275899A2/en
Publication of EP1275899A3 publication Critical patent/EP1275899A3/en
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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
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • 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
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/37—U-shaped

Definitions

  • the present invention relates to a luminaire according to the preamble of claim 1.
  • a luminaire of this type which has a cup-shaped main reflector, which is set up for the emission of a substantially narrow beam, is suitable for illuminating relatively small areas brightly.
  • Such lights are sunk in a ceiling and thereby aligned vertically, so that they radiate all the light down.
  • such luminaires are therefore generally referred to as "downlights”.
  • Such a downlight radiates predominantly steeply downwards, so that above a certain angle with respect to the horizontal no or almost no light leaves the luminaire. As a result, glare is avoided by the usually extremely bright lamps for people within the room to be illuminated.
  • This known recessed ceiling light 21 consists of a light housing 26, which is sunk in the ceiling 25 of a room to be illuminated.
  • the light source is formed in the illustrated example by a compact fluorescent lamp 22 which is disposed within a cup-shaped reflector 23.
  • This reflector 23 is initially designed so that the light emitted by the fluorescent lamp 22 light beams are bundled into a relatively narrow and downwardly directed light cone.
  • the reflector region 24 lying opposite this wall is deformed in such a way that the light rays L 24 to L 26 striking it are directed against the wall.
  • reflector region 24 has such a changed curvature that the incident on it beams L 24 to L 26 are deflected more laterally compared to the incident on the opposite region of the reflector 23 rays L 21 to L 23 . This ensures that the upper wall area otherwise in the shadow of the reflector 23 is also irradiated.
  • the reflector 23 is cut open at the side opposite the wall to be illuminated and deformed in the desired manner.
  • a cut-out reflector region can be replaced by an additional reflector with a different curvature. Both approaches, however, require an additional and costly operation in the manufacture of the lamp.
  • FIG. 6 Another known way in Fig. 6 is shown, is to arrange a reflective insert 34 in front of a portion of the lateral periphery of the reflector 33.
  • the curvature of this reflective insert 34 is in turn such that the light beams L 34 to L 36 emitted by the lamp 32 and impinging on it are reflected laterally compared to the light beams L 31 to L 33 incident on the opposite region of the reflector 33.
  • the disadvantage of this embodiment is that the per se circular opening 35 of the reflector 33 of the lamp 31 is partially covered by the crescent-shaped bottom 36 of the reflector insert 34, so that the reflector opening 35 is deformed into a kind of ellipse, which is optically considered disadvantageous ,
  • a third possibility - not shown - is to make the reflector wall step-shaped on the side of the reflector opposite the wall to be illuminated, with the individual steps increasingly directing the light against the wall.
  • the opening of the reflector is not changed, but the production of such a reflector is relatively expensive.
  • an additional reflector is attached to a portion of the outside of the main reflector such that the additional reflector reflects light onto the wall to be illuminated.
  • the main reflector in the corresponding area must have a window that does not have a reflection layer. During the manufacturing process, the corresponding area of the main reflector must therefore be covered during the spraying of the reflection layer.
  • the present invention is therefore based on the object to provide a way to judge a part of the light emitted by a downlight side, with the desired solution should be characterized in that they on the one hand inexpensive and visually appealing on the other hand.
  • the exit opening of the reflector should be changed as little as possible.
  • a luminaire having the features of claim 1.
  • This has a cup-shaped main reflector, which is set up for the emission of a substantially narrow beam, wherein an additional reflector element is arranged in front of a portion of the lateral periphery on the inside of the main reflector.
  • this additional reflector element consists of a light-transmissive material and is structured in such a way that it totally reflects at least part of the light rays striking the reflector element from the light source.
  • the total reflection can be achieved by a corresponding design of the surface of the reflector element, for example, this may have on its side facing away from the light source a prism structure, in particular a groove structure.
  • the reflector element is made of translucent plastic, so that e.g. can be produced by injection molding.
  • the solution according to the invention is characterized in that the additional reflector element can be easily manufactured and arranged in the main reflector.
  • a coating with a reflective material is not necessary, so that the manufacturing costs are extremely low.
  • the reflector opening of the main reflector is only insignificantly influenced by the additional element. Further, since a part of the rays outgoing from the light source can pass through the reflector element and strike the main reflector, a visually appealing overall impression is obtained.
  • the reflector element may be flush with the opening of the main reflector but also deliberately configured or arranged such that it projects beyond the opening of the main reflector.
  • Fig. 1 shows a first embodiment of the present invention in the form of a downlight, which is designed as a ceiling light fixture 1 and the lamp housing 5 is accordingly sunk in the ceiling 8 of a room to be illuminated.
  • a downwardly open cup-shaped main reflector 6 within the lamp housing 5 is a downwardly open cup-shaped main reflector 6, on whose bottom side a light source in the form of a compact fluorescent lamp 2 is arranged.
  • the base 3 of the fluorescent lamp 2 is fixed in a manner not shown on the lamp housing 5, from the back of the base 3, a power line 4 leads to the general power supply.
  • the compact fluorescent lamp 2 shown here instead of the compact fluorescent lamp 2 shown here, however, other lamps can be used as the light source.
  • the main reflector 6 is designed so that it focuses the light generated by the compact fluorescent lamp 2 to a relatively narrow beam which is directed downwards.
  • an additional reflector element 7 is arranged in front of the wall opposite the circumference of the main reflector 6, which is designed or curved so that the incident of the lamp 2 on the reflector element 7 light beams L 4 to L 6 is totally reflected and thereby compared to the incident on the main reflector 6 light beams L 1 to L 3 are deflected laterally.
  • the reflector element 7 is concavely curved and inclined slightly inclined with respect to the reflector wall.
  • the opening of the main reflector 6 in contrast to the in Fig. 6 shown known solution not covered, so that the light 1 consider from below still appears circular. Further, since a part of the incident on the reflector element 7 rays of light passes through this, also the lying behind the reflector element 7 region of the main reflector 6 is illuminated, so that there is a visually appealing impression.
  • the overall impression of the lamp according to the invention is further improved by the fact that the reflector element 7 itself consists of a light-transmitting material.
  • the total reflection of the light beams is achieved by providing a prism structure 9 on the rear side, ie on the side of the reflector element 7 facing away from the lamp 2.
  • a prism structure 9 formed by triangular in cross-section elevations 10, which together form a groove structure.
  • a total reflection angle is defined.
  • Light rays which strike the boundary surface at a larger angle than the total reflection angle on emerging from the reflector element 7 are totally reflected, as shown in FIG Fig. 3 is illustrated by the light beams L 7 to L 9 .
  • the shape of the elevations 10 is accordingly selected such that a majority of the light rays impinging on the reflector element 7 from the lamp 2 is totally reflected at the rear side of the reflector element 7.
  • the groove-shaped structure of the rear side of the reflector element 7 shown here however, other prism structures would also be conceivable with which the desired total reflection is achieved.
  • FIG. 4 illustrated second embodiment of the lamp according to the invention differs from the embodiment in Fig. 1 in that the reflector element 7 projects clearly beyond the opening of the main reflector 6. This gives the lamp 1 an interesting appearance, the effect of the reflector element 7, however, remains substantially unchanged. That is, even in this embodiment, the main task of the reflector element 7 is to divert the light rays of the lamp 2 laterally on the wall to be illuminated.
  • the luminaire according to the invention is characterized in that the desired light deflection is achieved in a simple manner.
  • the funds required for this purpose are simple and inexpensive to manufacture.
  • the transparent reflector element gives the lamp an interesting and visually appealing appearance.
  • the main reflector instead of the illustrated form can take other forms. For example, it could also have the shape of an ellipse or a rectangular or elongated shape.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The device has a light source (2), a pot-shaped main reflector (6) for emitting an essentially narrow light beam and an additional reflector element (7) in front of a sub-region of the lateral periphery of the main reflector. The additional reflector is made of transparent material and structured so that it totally reflects at least part of the light from the source incident on it.

Description

Die vorliegende Erfindung betrifft eine Leuchte nach dem Oberbegriff des Anspruches 1.The present invention relates to a luminaire according to the preamble of claim 1.

Eine Leuchte dieser Art, die einen topfförmigen Hauptreflektor aufweist, der für die Abstrahlung eines im wesentlichen schmalen Strahlenbündels eingerichtet ist, ist dazu geeignet, relativ kleine Flächen hell auszuleuchten. Üblicher Weise werden derartige Leuchten in einer Decke versenkt und dabei vertikal ausgerichtet, so daß sie das gesamte Licht nach unten abstrahlen. In der Fachsprache werden solche Leuchten daher allgemein als "Downlights" bezeichnet.A luminaire of this type, which has a cup-shaped main reflector, which is set up for the emission of a substantially narrow beam, is suitable for illuminating relatively small areas brightly. Usually, such lights are sunk in a ceiling and thereby aligned vertically, so that they radiate all the light down. In technical terms, such luminaires are therefore generally referred to as "downlights".

Ein solches Downlight strahlt das Licht überwiegend steil nach unten ab, so daß oberhalb eines bestimmten Winkels bezüglich der Horizontalen kein oder nahezu kein Licht die Leuchte verläßt. Hierdurch wird für Personen innerhalb des zu beleuchtenden Raumes eine Blendung durch die meist äußerst hellen Lampen vermieden.Such a downlight radiates predominantly steeply downwards, so that above a certain angle with respect to the horizontal no or almost no light leaves the luminaire. As a result, glare is avoided by the usually extremely bright lamps for people within the room to be illuminated.

Wird ein solches Downlight in der Nähe einer Wand angeordnet, so ist es oftmals erwünscht, daß nicht nur der unterhalb der Leuchte liegende Bereich, sondern auch die benachbarte Wand ausgeleuchtet wird. Normalerweise würde jedoch der obere Teil der Wand, der nicht innerhalb des durch den Reflektor vorgegebenen Strahlungskegels liegt, dunkel bleiben, während der untere Bereich der Wand angestrahlt bzw. erhellt wird. Um daher die Wand über ihre im wesentlichen gesamte Höhe hinweg aufzuhellen, müssen an der Leuchte Maßnahmen vorgenommen werden, durch die ein seitliches Abstrahlen zumindest eines Teil des Lichts in Richtung der Wand erzielt wird.When such a downlight is placed near a wall, it is often desirable to illuminate not only the area below the light but also the adjacent wall. Normally, however, the upper portion of the wall, which is not within the radiation cone defined by the reflector, would remain dark while the lower portion of the wall is illuminated. Therefore, to lighten the wall over its substantially entire height, measures must be taken on the luminaire, by which a lateral emission of at least a portion of the light is achieved in the direction of the wall.

Eine erste Lösung hierfür, die beispielsweise in der EP 0 802 368 A2 beschrieben ist, ist in Fig. 5 dargestellt. Diese bekannte Deckeneinbauleuchte 21 besteht aus einem Leuchtengehäuse 26, welches in der Decke 25 eines zu beleuchtenden Raumes versenkt ist. Die Lichtquelle wird im dargestellten Beispiel durch eine Kompaktleuchtstofflampe 22 gebildet, die innerhalb eines topfförmigen Reflektors 23 angeordnet ist. Dieser Reflektor 23 ist zunächst derart ausgelegt, daß die von der Leuchtstofflampe 22 abgegebenen Lichtstrahlen zu einem verhältnismäßig schmalen und nach unten gerichteten Lichtkegel gebündelt werden.A first solution for this, for example, in the EP 0 802 368 A2 is described in is Fig. 5 shown. This known recessed ceiling light 21 consists of a light housing 26, which is sunk in the ceiling 25 of a room to be illuminated. The light source is formed in the illustrated example by a compact fluorescent lamp 22 which is disposed within a cup-shaped reflector 23. This reflector 23 is initially designed so that the light emitted by the fluorescent lamp 22 light beams are bundled into a relatively narrow and downwardly directed light cone.

In dem dargestellten Beispiel befindet sich links unterhalb der Leuchte 21 eine nicht dargestellte Wand des Raumes, die ebenfalls erhellt werden soll. Hierzu ist der dieser In dem dargestellten Beispiel befindet sich links unterhalb der Leuchte 21 eine nicht dargestellte Wand des Raumes, die ebenfalls erhellt werden soll. Hierzu ist der dieser Wand gegenüberliegende Reflektorbereich 24 derart verformt, daß die auf ihn treffenden Lichtstrahlen L24 bis L26 gegen die Wand gelenkt werden. Wie in Fig. 5 dargestellt ist, weist Reflektorbereich 24 eine derart veränderte Krümmung auf, daß die auf ihn auftreffenden Strahlen L24 bis L26 im Vergleich zu den auf den gegenüberliegenden Bereich des Reflektors 23 treffenden Strahlen L21 bis L23 stärker seitlich abgelenkt werden. Hierdurch wird erreicht, daß der ansonsten im Schatten des Reflektors 23 liegende obere Wandbereich ebenfalls bestrahlt wird.In the example shown, there is a wall of the room, not shown, below the luminaire 21, which is also to be illuminated. For this is the this In the example shown, there is a wall of the room, not shown, below the luminaire 21, which is also to be illuminated. For this purpose, the reflector region 24 lying opposite this wall is deformed in such a way that the light rays L 24 to L 26 striking it are directed against the wall. As in Fig. 5 is shown, reflector region 24 has such a changed curvature that the incident on it beams L 24 to L 26 are deflected more laterally compared to the incident on the opposite region of the reflector 23 rays L 21 to L 23 . This ensures that the upper wall area otherwise in the shadow of the reflector 23 is also irradiated.

In der Praxis wird der Reflektor 23 an der der zu beleuchtenden Wand gegenüberliegenden Seite aufgeschnitten und in der gewünschten Weise verformt. Alternativ dazu kann auch ein herausgeschnittener Reflektorbereich durch einen Zusatzreflektor mit einer anderen Krümmung ersetzt werden. Beide Vorgehensweise erfordern allerdings einen zusätzlichen und kostenintensiven Arbeitsschritt bei der Herstellung der Leuchte.In practice, the reflector 23 is cut open at the side opposite the wall to be illuminated and deformed in the desired manner. Alternatively, a cut-out reflector region can be replaced by an additional reflector with a different curvature. Both approaches, however, require an additional and costly operation in the manufacture of the lamp.

Eine andere bekannte Möglichkeit, die in Fig. 6 dargestellt ist, besteht darin, vor einem Teilbereich des seitlichen Umfangs des Reflektors 33 einen reflektierenden Einsatz 34 anzuordnen. Die Krümmung dieses reflektierenden Einsatzes 34 ist wiederum derart, daß die von der Lampe 32 emittierten und auf ihn auftreffenden Lichtstrahlen L34 bis L36 im Vergleich zu den auf den gegenüberliegenden Bereich des Reflektors 33 auftreffenden Lichtstrahlen L31 bis L33 seitlich reflektiert werden.Another known way in Fig. 6 is shown, is to arrange a reflective insert 34 in front of a portion of the lateral periphery of the reflector 33. The curvature of this reflective insert 34 is in turn such that the light beams L 34 to L 36 emitted by the lamp 32 and impinging on it are reflected laterally compared to the light beams L 31 to L 33 incident on the opposite region of the reflector 33.

Der Nachteil dieser Ausführungsform besteht darin, daß die an sich kreisrunde Öffnung 35 des Reflektors 33 der Leuchte 31 durch die sichelförmige Unterseite 36 des Reflektoreinsatzes 34 teilweise abgedeckt wird, so daß die Reflektoröffnung 35 zu einer Art Ellipse verformt wird, was optisch als nachteilig angesehen wird.The disadvantage of this embodiment is that the per se circular opening 35 of the reflector 33 of the lamp 31 is partially covered by the crescent-shaped bottom 36 of the reflector insert 34, so that the reflector opening 35 is deformed into a kind of ellipse, which is optically considered disadvantageous ,

Eine dritte - nicht-dargestellte Möglichkeit - besteht schließlich darin, an der der zu beleuchtenden Wand gegenüberliegenden Seite des Reflektors die Reflektorwandung stufenförmig zu gestalten, wobei die einzelnen Stufen das Licht verstärkt gegen die Wand lenken. Bei dieser Ausgestaltung wird die Öffnung des Reflektors zwar nicht verändert, die Herstellung eines solchen Reflektors ist jedoch verhältnismäßig teuer.Finally, a third possibility - not shown - is to make the reflector wall step-shaped on the side of the reflector opposite the wall to be illuminated, with the individual steps increasingly directing the light against the wall. In this embodiment, the opening of the reflector is not changed, but the production of such a reflector is relatively expensive.

Eine weitere Möglichkeit wird in der EP 0 802 368 A2 in Fig. 5 gezeigt. Hier wird ein zusätzlicher Reflektor an einem Teilbereich der Außenseite des Hauptreflektors derart angebracht, dass der zusätzliche Reflektor Licht auf die zu beleuchtende Wand reflektiert. Dabei muss der Hauptreflektor in dem entsprechenden Bereich ein Fenster aufweisen, das nicht über eine Reflektionsschicht verfügt. Beim Herstellungsprozess muss der entsprechende Bereich des Hauptreflektors während des Aufsprühens der Reflektionsschicht daher abgedeckt werden.Another possibility is in the EP 0 802 368 A2 in Fig. 5 shown. Here, an additional reflector is attached to a portion of the outside of the main reflector such that the additional reflector reflects light onto the wall to be illuminated. The main reflector in the corresponding area must have a window that does not have a reflection layer. During the manufacturing process, the corresponding area of the main reflector must therefore be covered during the spraying of the reflection layer.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Möglichkeit zu schaffen, einen Teil des von einem Downlight abgestrahlten Lichts seitlich zu richten, wobei sich die angestrebte Lösung dadurch auszeichnen soll, daß sie einerseits preisgünstig und andererseits optisch ansprechend ist. Insbesondere soll die Austrittsöffnung des Reflektors möglichst wenig verändert werden.The present invention is therefore based on the object to provide a way to judge a part of the light emitted by a downlight side, with the desired solution should be characterized in that they on the one hand inexpensive and visually appealing on the other hand. In particular, the exit opening of the reflector should be changed as little as possible.

Die vorliegende Erfindung wird durch eine Leuchte, welche die Merkmale des Anspruches 1 aufweist, gelöst. Diese besitzt einen topfförmigen Hauptreflektor, der für die Abstrahlung eines im wesentlichen schmalen Strahlenbündels eingerichtet ist, wobei vor einem Teilbereich des seitlichen Umfangs an der Innenseite des Hauptreflektors ein zusätzliches Reflektorelement angeordnet ist. Erfindungsgemäß besteht dieses zusätzliche Reflektorelement aus einem lichtdurchlässigen Material und ist derart strukturiert, daß es zumindest einen Teil der von der Lichtquelle auf das Reflektorelement treffenden Lichtstrahlen totalreflektiert.The present invention is achieved by a luminaire having the features of claim 1. This has a cup-shaped main reflector, which is set up for the emission of a substantially narrow beam, wherein an additional reflector element is arranged in front of a portion of the lateral periphery on the inside of the main reflector. According to the invention, this additional reflector element consists of a light-transmissive material and is structured in such a way that it totally reflects at least part of the light rays striking the reflector element from the light source.

Die Totalreflexion kann durch eine entsprechende Ausgestaltung der Oberfläche des Reflektorelements erzielt werden, beispielsweise kann dieses an seiner der Lichtquelle abgewandten Seite eine Prismenstruktur, insbesondere eine Rillenstruktur aufweisen. Vorzugsweise besteht das Reflektorelement aus einem lichtdurchlässigen Kunststoff, so daß es z.B. mittels Spritzgießen hergestellt werden kann.The total reflection can be achieved by a corresponding design of the surface of the reflector element, for example, this may have on its side facing away from the light source a prism structure, in particular a groove structure. Preferably, the reflector element is made of translucent plastic, so that e.g. can be produced by injection molding.

Die erfindungsgemäße Lösung zeichnet sich dadurch aus, daß das zusätzliche Reflektorelement auf einfache Weise hergestellt und in dem Hauptreflektor angeordnet werden kann. Eine Beschichtung mit einem reflektierenden Material ist nicht notwendig, so daß die Herstellungskosten äußerst niedrig sind. Darüber hinaus wird die Reflektoröffnung des Hauptreflektors durch das zusätzliche Element nur unwesentlich beeinflußt. Da ferner ein Teil der von der Lichtquelle abgehenden Strahlen durch das Reflektorelement hindurchtreten und auf den Hauptreflektor treffen kann, wird ein optisch ansprechender Gesamteindruck erzielt. Das Reflektorelement kann mit der Öffnung des Hauptreflektors bündig sein aber auch bewußt derart ausgestaltet oder angeordnet werden, daß es über die Öffnung des Hauptreflektors hinaus ragt.The solution according to the invention is characterized in that the additional reflector element can be easily manufactured and arranged in the main reflector. A coating with a reflective material is not necessary, so that the manufacturing costs are extremely low. In addition, the reflector opening of the main reflector is only insignificantly influenced by the additional element. Further, since a part of the rays outgoing from the light source can pass through the reflector element and strike the main reflector, a visually appealing overall impression is obtained. The reflector element may be flush with the opening of the main reflector but also deliberately configured or arranged such that it projects beyond the opening of the main reflector.

Im folgenden soll die Erfindung anhand der beiliegenden Zeichnungen näher erläutert werden. Es zeigen:

Fig. 1
ein erstes Ausführungsbeispiel der erfindungsgemäßen Leuchte im seitlichen Schnitt;
Fig. 2
die Unterseite des in Fig. 1 dargestellten Ausführungsbeispiels;
Fig. 3
einen vergrößerten Ausschnitt des erfindungsgemäßen Reflektorelements;
In the following the invention will be explained in more detail with reference to the accompanying drawings. Show it:
Fig. 1
a first embodiment of the luminaire according to the invention in a lateral section;
Fig. 2
the bottom of the in Fig. 1 illustrated embodiment;
Fig. 3
an enlarged section of the reflector element according to the invention;

Fig. 1 zeigt ein erstes Ausführungsbeispiel der vorliegenden Erfindung in Form eines Downlights, das als Deckeneinbauleuchte 1 ausgestaltet ist und dessen Leuchtengehäuse 5 dementsprechend in der Decke 8 eines zu beleuchtenden Raumes versenkt ist. Innerhalb des Leuchtengehäuses 5 befindet sich ein nach unten offener topfförmiger Hauptreflektor 6, an dessen Bodenseite eine Lichtquelle in Form einer Kompaktleuchtstofflampe 2 angeordnet ist. Der Sockel 3 der Leuchtstofflampe 2 ist in nicht dargestellter Weise an dem Leuchtengehäuse 5 befestigt, von der Rückseite des Sockels 3 führt eine Stromleitung 4 zur allgemeinen Stromversorgung. Anstelle der hier dargestellten Kompaktleuchtstofflampe 2 können allerdings auch andere Lampen als Lichtquelle verwendet werden. Fig. 1 shows a first embodiment of the present invention in the form of a downlight, which is designed as a ceiling light fixture 1 and the lamp housing 5 is accordingly sunk in the ceiling 8 of a room to be illuminated. Within the lamp housing 5 is a downwardly open cup-shaped main reflector 6, on whose bottom side a light source in the form of a compact fluorescent lamp 2 is arranged. The base 3 of the fluorescent lamp 2 is fixed in a manner not shown on the lamp housing 5, from the back of the base 3, a power line 4 leads to the general power supply. Instead of the compact fluorescent lamp 2 shown here, however, other lamps can be used as the light source.

Der Hauptreflektor 6 ist derart gestaltet, daß er das von der Kompaktleuchtstofflampe 2 erzeugte Licht zu einem verhältnismäßig schmalen Strahlenbündel, das nach unten gerichtet ist, bündelt.The main reflector 6 is designed so that it focuses the light generated by the compact fluorescent lamp 2 to a relatively narrow beam which is directed downwards.

Wie auch in den Fig. 5 und 6 sei angenommen, daß sich links unterhalb der Leuchte 1 eine Wand befindet, welche zusätzlich von der Leuchte 1 erhellt werden soll. Hierfür ist erfindungsgemäß ein zusätzliches Reflektorelement 7 vor dem der Wand gegenüberliegenden Umfang des Hauptreflektors 6 angeordnet, das derart ausgestaltet bzw. gekrümmt ist, daß die von der Lampe 2 auf das Reflektorelement 7 treffenden Lichtstrahlen L4 bis L6 total reflektiert und dabei im Vergleich zu den auf den Hauptreflektor 6 treffenden Lichtstrahlen L1 bis L3 seitlich abgelenkt werden. Das Reflektorelement 7 ist hierzu konkav gekrümmt und gegenüber der Reflektorwand etwas geneigt angeordnet geneigt.As well as in the Fig. 5 and 6 Let it be assumed that there is a wall to the left below the luminaire 1, which wall should also be illuminated by the luminaire 1. For this purpose, according to the invention, an additional reflector element 7 is arranged in front of the wall opposite the circumference of the main reflector 6, which is designed or curved so that the incident of the lamp 2 on the reflector element 7 light beams L 4 to L 6 is totally reflected and thereby compared to the incident on the main reflector 6 light beams L 1 to L 3 are deflected laterally. For this purpose, the reflector element 7 is concavely curved and inclined slightly inclined with respect to the reflector wall.

Wie der Ansicht in Fig. 2 zu entnehmen ist, wird die Öffnung des Hauptreflektors 6 im Gegensatz zu der in Fig. 6 dargestellten bekannten Lösung nicht abgedeckt, so daß die Leuchte 1 von unten her betrachten nach wie vor kreisrund erscheint. Da ferner ein Teil der auf das Reflektorelement 7 treffenden Lichtstrahlen durch dieses hindurchtritt, wird auch der hinter dem Reflektorelement 7 liegende Bereich des Hauptreflektors 6 erhellt, so daß sich ein optisch ansprechender Eindruck ergibt. Der Gesamteindruck der erfindungsgemäßen Leuchte wird ferner dadurch verbessert, daß das Reflektorelement 7 selbst aus einem lichtdurchlässigen Material besteht.As the view in Fig. 2 can be seen, the opening of the main reflector 6 in contrast to the in Fig. 6 shown known solution not covered, so that the light 1 consider from below still appears circular. Further, since a part of the incident on the reflector element 7 rays of light passes through this, also the lying behind the reflector element 7 region of the main reflector 6 is illuminated, so that there is a visually appealing impression. The overall impression of the lamp according to the invention is further improved by the fact that the reflector element 7 itself consists of a light-transmitting material.

Die Totalreflexion der Lichtstrahlen wird dadurch erreicht, daß an der Rückseite, also an der der Lampe 2 abgewandten Seite des Reflektorelements 7 eine Prismenstruktur 9 vorgesehen ist. Wie der vergrößerten Darstellung in Fig. 3 zu entnehmen ist, wird diese Mikroprismenstruktur 9 durch im Querschnitt dreieckförmige Erhebungen 10 gebildet, welche insgesamt eine Rillenstruktur bilden.The total reflection of the light beams is achieved by providing a prism structure 9 on the rear side, ie on the side of the reflector element 7 facing away from the lamp 2. As the enlarged view in Fig. 3 it can be seen, this is Microprism structure 9 formed by triangular in cross-section elevations 10, which together form a groove structure.

Durch das Verhältnis zwischen dem Brechungsindex des Reflektorelements 7 und dem Brechungsindex von Luft wird ein Totalreflexionswinkel definiert. Lichtstrahlen, die beim Austreten aus dem Reflektorelement 7 unter einem größeren Winkel als dem Totalreflexionswinkel auf die Grenzfläche treffen, werden dabei total reflektiert, wie dies in Fig. 3 anhand der Lichtstrahlen L7 bis L9 dargestellt ist. Die Form der Erhebungen 10 ist dementsprechend derart gewählt, daß ein Großteil der von der Lampe 2 auf das Reflektorelement 7 treffenden Lichtstrahlen an der Rückseite des Reflektorelements 7 totalreflektiert wird. Anstelle der hier dargestellten rillenförmigen Struktur der Rückseite des Reflektorelements 7 wären allerdings auch andere Prismenstrukturen denkbar, mit denen die gewünschte Totalreflexion erzielt wird.By the ratio between the refractive index of the reflector element 7 and the refractive index of air, a total reflection angle is defined. Light rays which strike the boundary surface at a larger angle than the total reflection angle on emerging from the reflector element 7 are totally reflected, as shown in FIG Fig. 3 is illustrated by the light beams L 7 to L 9 . The shape of the elevations 10 is accordingly selected such that a majority of the light rays impinging on the reflector element 7 from the lamp 2 is totally reflected at the rear side of the reflector element 7. Instead of the groove-shaped structure of the rear side of the reflector element 7 shown here, however, other prism structures would also be conceivable with which the desired total reflection is achieved.

Das in Fig. 4 dargestellte zweite Ausführungsbeispiel der erfindungsgemäßen Leuchte unterscheidet sich von dem Ausführungsbeispiel in Fig. 1 dadurch, daß das Reflektorelement 7 deutlich über die Öffnung des Hauptreflektors 6 hinausragt. Hierdurch erhält die Leuchte 1 ein interessantes Aussehen, die Wirkung des Reflektorelements 7 bleibt allerdings im wesentlichen unverändert. D.h., auch bei diesem Ausführungsbeispiel besteht die Hauptaufgabe des Reflektorelements 7 darin, die Lichtstrahlen der Lampe 2 auf die zu beleuchtende Wand seitlich abzulenken.This in Fig. 4 illustrated second embodiment of the lamp according to the invention differs from the embodiment in Fig. 1 in that the reflector element 7 projects clearly beyond the opening of the main reflector 6. This gives the lamp 1 an interesting appearance, the effect of the reflector element 7, however, remains substantially unchanged. That is, even in this embodiment, the main task of the reflector element 7 is to divert the light rays of the lamp 2 laterally on the wall to be illuminated.

Die erfindungsgemäße Leuchte zeichnet sich dadurch aus, daß auf einfache Weise die gewünschte Lichtumlenkung erzielt wird. Die hierzu benötigten Mittel sind einfach und kostengünstig herzustellen. Darüber hinaus verleiht das durchsichtige Reflektorelement der Leuchte ein interessantes und optisch ansprechendes Aussehen. Abschließend ist zu bemerken, daß der Hauptreflektor anstelle der dargestellten Form auch andere Formen annehmen kann. Beispielsweise könnte er auch die Form einer Ellipse oder eine rechteckige bzw. längliche Form aufweisen.The luminaire according to the invention is characterized in that the desired light deflection is achieved in a simple manner. The funds required for this purpose are simple and inexpensive to manufacture. In addition, the transparent reflector element gives the lamp an interesting and visually appealing appearance. Finally, it should be noted that the main reflector instead of the illustrated form can take other forms. For example, it could also have the shape of an ellipse or a rectangular or elongated shape.

Claims (8)

  1. Luminaire (1) comprising a light source (2), a pot-shaped main reflector (6) designed to emit a substantially narrow beam, and an additional reflector element (7) made of a light-transmitting material,
    characterized in that
    the additional reflector element (7) is disposed in front of a sub-region of the lateral periphery at the inside of the main reflector (6) and is configured in such a way that it totally reflects at least a fraction of the light beams (L4 - L6) from the light source (2) that strike the reflector element (7).
  2. Luminaire according to claim 1,
    characterized in that
    the surface of the reflector element (7) remote from the light source (2) is shaped in such a way that a fraction of the light beams (L4 - L6) upon leaving the reflector element (7) is totally reflected.
  3. Luminaire according to claim 2,
    characterized in that
    the reflector element (7) at its side remote from the light source (2) has a prismatic configuration (9).
  4. Luminaire according to claim 3,
    characterized in that
    the reflector element (7) at its side remote from the light source (2) has a grooved configuration.
  5. Luminaire according to one of the preceding claims,
    characterized in that
    the reflector element (7) is made of light-transmitting plastics material.
  6. Luminaire according to one of the preceding claims,
    characterized in that
    the reflector element (7) projects beyond the opening of the main reflector (6).
  7. Luminaire according to one of claims 1 to 5,
    characterized in that
    the reflector element (7) is flush with the opening of the main reflector (6).
  8. Luminaire according to one of the preceding claims,
    characterized in that
    it is a recessed ceiling Luminaire (1).
EP02014572A 2001-07-10 2002-07-01 Downlighter with lateral reflector Expired - Lifetime EP1275899B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10133360A DE10133360A1 (en) 2001-07-10 2001-07-10 Downlight with side reflector
DE10133360 2001-07-10

Publications (3)

Publication Number Publication Date
EP1275899A2 EP1275899A2 (en) 2003-01-15
EP1275899A3 EP1275899A3 (en) 2006-10-11
EP1275899B1 true EP1275899B1 (en) 2009-09-16

Family

ID=7691193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02014572A Expired - Lifetime EP1275899B1 (en) 2001-07-10 2002-07-01 Downlighter with lateral reflector

Country Status (3)

Country Link
EP (1) EP1275899B1 (en)
AT (1) ATE443228T1 (en)
DE (2) DE10133360A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20040172U1 (en) * 2004-04-15 2004-07-15 Iguzzini Illuminazione REFLECTIVE SURFACE REFLECTIVE ASSEMBLY MODIFIABLE IN A LIGHTING DEVICE
NL1032767C2 (en) * 2006-10-30 2008-05-06 Spanninga Metaal Device for providing lighting along a surface.
CN104214676B (en) * 2013-05-29 2016-09-07 海洋王（东莞）照明科技有限公司 Gas-discharge lamp and reflection subassembly thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE185591C (en) *
DE8208617U1 (en) * 1982-03-26 1982-08-12 Eurolicht Lichtarchitectuur B.V., 5070 Naarden REFLECTOR FOR A LIGHT SOURCE
DE3436778A1 (en) * 1984-01-27 1985-08-01 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Luminaire for large-area and uniform illumination of living and working spaces or the like
DE4237192A1 (en) * 1992-11-04 1994-05-05 Hoffmeister Leuchten Kg Electric lighting fitting with composite reflector for illumination control - has opposite facing sides of concave reflector formed respectively as concentric steps and smooth cone for additive reduced glare flux control.
US5535110A (en) * 1995-02-16 1996-07-09 Cooper Industries, Inc. Ceiling mounted wallwash light fixture
DE19615388A1 (en) * 1996-04-18 1997-10-23 Zumtobel Licht Luminaire with a particularly small-volume lamp

Also Published As

Publication number Publication date
DE10133360A1 (en) 2003-01-23
EP1275899A2 (en) 2003-01-15
DE50213844D1 (en) 2009-10-29
ATE443228T1 (en) 2009-10-15
EP1275899A3 (en) 2006-10-11

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