EP3030829B1 - Luminaire having a curved prism structure element - Google Patents

Luminaire having a curved prism structure element Download PDF

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Publication number
EP3030829B1
EP3030829B1 EP14741886.7A EP14741886A EP3030829B1 EP 3030829 B1 EP3030829 B1 EP 3030829B1 EP 14741886 A EP14741886 A EP 14741886A EP 3030829 B1 EP3030829 B1 EP 3030829B1
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EP
European Patent Office
Prior art keywords
refractive element
light
reflector
luminaire
luminaire according
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EP14741886.7A
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German (de)
French (fr)
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EP3030829A1 (en
Inventor
Lennart Sulzbach
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Zumtobel Lighting GmbH Germany
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Zumtobel Lighting GmbH Germany
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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
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • 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 luminaire with a light source, a reflector and a refractive element.
  • the lens is optically arranged between the light source and the reflector.
  • the lens forms very restrictive framework conditions with respect to the design of the shape and size of the reflector.
  • the refractive element is concavely curved and has a surface with prismatic elements.
  • the lighting device has a light source, a reflector and an expansion lens.
  • the expansion lens is arranged inclined with respect to the installation plane oriented.
  • the lamp has a diffuser, which can be pivoted relative to the light source.
  • the invention has for its object to provide a corresponding improved luminaire.
  • the luminaire should have improved possibilities with regard to the design of the optical properties with a total of small construction.
  • a luminaire which has a light source for generating a light, a reflector for influencing the light and a refractive element for further influencing the light.
  • the refractive element is curved and has a surface provided with a prism structure.
  • the design possibilities of the lamp with respect to the relative arrangement between the refractive element on the one hand and the reflector on the other hand and thus improved with respect to the optical properties of the lamp can be achieved in this way that the lamp a large wall area can be obliquely and thereby particularly evenly illuminated.
  • the prism structure is a microprism structure.
  • microprism structure may be understood in particular a structure having a structural height of less than 1 mm.
  • the luminaire is designed in accordance with the invention in such a way that the surface forms a light exit surface of the refractive element for the light generated by the light source.
  • the surface according to the invention is formed concavely arched at least to a first approximation. This is intended to describe the overall shape of the surface or of the light exit surface, ie in particular the "main shape" of the surface, neglecting the prism structure.
  • a light exit region of the luminaire is formed by an edge of the reflector, which has a diameter.
  • a particularly advantageous shape of the surface or the light exit surface can be achieved if it has, at least to a first approximation, a curvature which is described by a radius of curvature which is greater than half the diameter of the light exit region and less than twice the diameter of the light emission area.
  • the refractive element further comprises a further surface, wherein the further surface forms a light entry surface of the refractive element for the light.
  • the further surface is convexly curved, at least to a first approximation.
  • the refractive element is substantially in the shape of a curved disk or lens, being shaped to have a thickness between the surface and the further surface that is less than 100%, preferably less than 50%, more preferably less than 30%.
  • the refractive element can be made in this way "thin" and thus space-saving.
  • the refractive element is designed as an injection molded part.
  • the shape of the refractive element can be adapted particularly well to the shape of the reflector.
  • the refractive element is arranged directly adjacent to a reflective inner wall region of the reflector.
  • the light-refracting element has molded-on holding elements, which engage in support of the refractive element on the reflector in correspondingly corresponding recesses of the reflector.
  • the light source comprises at least one LED. This is particularly advantageous with respect to the size of the lamp and the life and efficiency of the light source.
  • a plane is defined by the edge of the reflector, wherein the light source has a board which is arranged aligned in a further plane and wherein the further plane with the first-mentioned plane encloses an angle which is between 40 ° and 80 °, preferably between 50 ° and 70 °.
  • the lamp is particularly well suited for "oblique" delivery of light.
  • the lamp is suitable if it is designed as a wall washer. Particularly advantageous, it can be designed as a recessed light.
  • Fig. 1 shows a perspective sketch of a lamp according to the invention.
  • the lamp is designed as a "wall washer” or “Wallwasher”.
  • a lamp is intended to illuminate a wall area. It can be provided, for example, to be arranged for operation on or in a room ceiling and to illuminate a, adjacent to the ceiling, vertical wall portion of obliquely above.
  • the luminaire can accordingly be designed as a surface-mounted luminaire or, as in the example shown here, as a recessed luminaire.
  • Fig. 2 shows a cross section through the lamp.
  • the luminaire can be provided or designed to be held for operation via a mounting ring 4 in an installation opening of a wall element 5, or a ceiling element.
  • the luminaire has a light source 1 for generating a light.
  • the light source 1 comprises at least one LED.
  • the at least one LED can be provided arranged on a circuit board 6.
  • the board 6 is designed plate-shaped and has a surface on which the at least one LED is arranged, wherein the surface has a surface normal, by which a main emission R of the light source 1 is fixed.
  • the lamp comprises a reflector 2 for influencing, in particular for influencing the directional behavior of the light.
  • the reflector 2 has an edge 7, through which a light exit region of the lamp is formed with a diameter D.
  • the light exit area generally need not be circular. In the case of a non-circular light exit region, the term "diameter" denotes the greatest extent of the light exit region.
  • the edge 7 of the reflector 2 is designed to extend in a plane E.
  • the plate-shaped plate 6 is arranged aligned in a further plane E ', said further plane E' with the first-mentioned plane E forms an angle ⁇ , preferably between 40 ° and 80 °, for example between 50 ° and 70 °.
  • the angle may be between 58 ° and 62 °.
  • the lamp has a refractive element 3 for further influencing the light.
  • the refractive element 3 is curved in shape and has a surface 32 provided with a prismatic structure. It is preferably provided that the prism structure extends over the entire surface 32.
  • the prism structure is preferably a microprism structure.
  • the refractive element 3 is preferably designed so that it serves, in particular by an action of the prism structure, to glare the light generated by the light source 1.
  • the surface 32 of the refractive element 3 preferably forms a light exit surface of the refractive element 3 for the light generated by the light source 1.
  • the light generated by the light source 1 can be directed, particularly at particularly shallow angles, to a wall area to be illuminated in such a way that it is illuminated uniformly over its entire height.
  • Fig. 3 shows a sectional, perspective sketch, which illustrates the relative arrangement between the reflector 2 and the refractive element 3 by way of example.
  • the surface 32 of the refractive element 3 or the light exit surface is preferably concavely curved, at least to a first approximation.
  • a first approximation is hereby expressed in particular that the shape of the surface 32 is described in its entirety, ie in any case neglecting the prismatic structure formed on the surface 32.
  • the shape of the refractive element 3, in particular the shape of the surface 32 or the light exit surface is matched to the design of the reflector 2.
  • the surface 32 at least to a first approximation has a curvature which is described by a radius of curvature which is greater than half the diameter D of the light exit region and less than twice the diameter of the light exit region.
  • the surface 32 has said curvature in a sectional plane which is oriented both normal to the plane E and normal to the further plane E '; this section plane corresponds to the plane of the drawing Fig. 2 ,
  • the surface 32 may also be shaped to be viewed in a further section normal to the plane E and normal to said section plane, not curved, or having a lesser curvature.
  • the refractive element 3 also has a further surface 31 which forms a light entry surface of the refractive element 3 for the light generated by the light source.
  • This further surface 31 is preferably convexly curved, at least to a first approximation.
  • the refractive element 3 may take the form of a curved disk or lens having a substantially uniform thickness over its entire extension.
  • the refractive element 3 may be shaped such that it has, between the surface 32 and the further surface 31 - or between the light exit surface and the light entry surface - a thickness d which is less than 100%, preferably less than 50%, most preferably varies less than 30%.
  • the refractive element 3 is disposed directly adjacent to a reflective inner wall portion 21 of the reflector 2. In this way, an optical interaction of the refractive element 3 with the reflector 2 can be made particularly direct and thus effective.
  • the design is such that the optical element 3 has an edge that is generally adjacent to the inner wall region 21 of the reflector 2, as shown Fig. 1 suggestively.
  • the refractive element 3 is preferably designed as an injection molded part. In this way, the shape of the refractive element 3 can be adapted particularly well to the shape of the reflector 2, in particular to the shape of the reflective inner wall region 21.
  • the production by spraying is also more advantageous, in particular less expensive than a production by milling.
  • the reflector 2 consists of a metal and the refractive element 3 made of a plastic.
  • the light-refracting element 3 may have integrally formed, in particular on the further surface 31 integrally formed holding elements 35 which engage for holding the refractive element 3 on the reflector 2 in correspondingly corresponding recesses of the reflector 2.
  • the refractive element 3 may be designed to have a magnification factor of between 5 and 20, for example about 10, with respect to the light generated by the light source 1.

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

Description

Die Erfindung betrifft eine Leuchte mit einer Lichtquelle, einem Reflektor und einem lichtbrechenden Element.The invention relates to a luminaire with a light source, a reflector and a refractive element.

Aus der DE 10 2011 079 404 A1 ist eine solche Leuchte bekannt. Die Linse ist dabei optisch zwischen der Lichtquelle und dem Reflektor angeordnet. Allerdings bildet die Linse dabei sehr einschränkende Rahmenbedingungen mit Bezug auf die Gestaltung der Form und der Größe des Reflektors.From the DE 10 2011 079 404 A1 is known such a lamp. The lens is optically arranged between the light source and the reflector. However, the lens forms very restrictive framework conditions with respect to the design of the shape and size of the reflector.

Aus der US 2011/0310625 A1 ist eine Leuchte mit einer Lichtquelle, einem Reflektor und einem lichtbrechenden Element bekannt. Das lichtbrechende Element ist konkav gewölbt und weist eine Oberfläche mit Prismenelementen auf.From the US 2011/0310625 A1 a luminaire with a light source, a reflector and a refractive element is known. The refractive element is concavely curved and has a surface with prismatic elements.

Aus der EP 0994 294 A2 ist eine Deckeneinbauleuchte zur Beleuchtung einer Seitenwand bekannt. Die Beleuchtungsvorrichtung weist eine Lichtquelle, einen Reflektor und eine Spreizlinse auf. Die Spreizlinse ist gegenüber der Einbauebene geneigt orientiert angeordnet.From the EP 0994 294 A2 is a recessed ceiling luminaire for lighting a side wall known. The lighting device has a light source, a reflector and an expansion lens. The expansion lens is arranged inclined with respect to the installation plane oriented.

Aus der US 8,096,670 B2 ist eine Leuchte mit einer Lichtquelle und einem Reflektor bekannt. Weiterhin weist die Leuchte einen Diffusor auf, der sich gegenüber der Lichtquelle schwenken lässt.From the US 8,096,670 B2 a luminaire with a light source and a reflector is known. Furthermore, the lamp has a diffuser, which can be pivoted relative to the light source.

Weitere Leuchten mit einer Lichtquelle, einem Reflektor und einem lichtbrechenden Element sind aus den Schriften EP 1 722 158 A1 und US Re. 24,372 bekannt.Other lights with a light source, a reflector and a refractive element are from the writings EP 1 722 158 A1 and US Re. 24.372 known.

Der Erfindung liegt die Aufgabe zugrunde, eine entsprechende verbesserte Leuchte anzugeben. Insbesondere soll die Leuchte bei insgesamt kleiner Bauausführung verbesserte Möglichkeiten mit Bezug auf die Gestaltung der optischen Eigenschaften aufweisen.The invention has for its object to provide a corresponding improved luminaire. In particular, the luminaire should have improved possibilities with regard to the design of the optical properties with a total of small construction.

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 Leuchte vorgesehen, die eine Lichtquelle zur Erzeugung eines Lichts aufweist, einen Reflektor zur Beeinflussung des Lichts und ein lichtbrechendes Element zur weiteren Beeinflussung des Lichts. Dabei ist das lichtbrechende Element gekrümmt geformt und weist eine, mit einer Prismenstruktur versehene Oberfläche auf.According to the invention, a luminaire is provided which has a light source for generating a light, a reflector for influencing the light and a refractive element for further influencing the light. In this case, the refractive element is curved and has a surface provided with a prism structure.

Durch diese Ausführung des lichtbrechenden Elements sind insbesondere die Gestaltungsmöglichkeiten der Leuchte mit Bezug auf die Relativanordnung zwischen dem lichtbrechenden Element einerseits und dem Reflektor andererseits und somit mit Bezug auf die optischen Eigenschaften der Leuchte verbessert. Beispielsweise lässt sich auf diese Weise erzielen, dass mit der Leuchte ein großer Wandbereich schräg und dabei besonders gleichmäßig beleuchtet werden kann.By this embodiment of the refractive element in particular the design possibilities of the lamp with respect to the relative arrangement between the refractive element on the one hand and the reflector on the other hand and thus improved with respect to the optical properties of the lamp. For example, can be achieved in this way that the lamp a large wall area can be obliquely and thereby particularly evenly illuminated.

Vorzugsweise ist die Prismenstruktur eine Mikroprismenstruktur. Unter "Mikroprismenstruktur" kann dabei insbesondere eine Struktur mit einer Strukturhöhe von weniger als 1 mm verstanden sein.Preferably, the prism structure is a microprism structure. By "microprism structure" may be understood in particular a structure having a structural height of less than 1 mm.

Besonders geeignete optische Eigenschaften der Leuchte lassen sich erzielen, wenn die Leuchte - wie erfindungsgemäß vorgesehen - derart gestaltet ist, dass die Oberfläche eine Lichtaustrittsfläche des lichtbrechenden Elements für das von der Lichtquelle erzeugte Licht bildet. Weiterhin vorteilhaft ist die Oberfläche erfindungsgemäß zumindest in erster Näherung konkav gewölbt geformt. Damit soll die Gesamtform der Oberfläche bzw. der Lichtaustrittsfläche beschrieben sein, also insbesondere die "Hauptform" der Oberfläche unter Vernachlässigung der Prismenstruktur.Particularly suitable optical properties of the luminaire can be achieved if the luminaire is designed in accordance with the invention in such a way that the surface forms a light exit surface of the refractive element for the light generated by the light source. Further advantageously, the surface according to the invention is formed concavely arched at least to a first approximation. This is intended to describe the overall shape of the surface or of the light exit surface, ie in particular the "main shape" of the surface, neglecting the prism structure.

Erfindungsgemäß ist durch einen Rand des Reflektors ein Lichtaustrittsbereich der Leuchte gebildet ist, der einen Durchmesser aufweist. Dabei lässt sich eine besonders vorteilhafte Form der Oberfläche bzw. der Lichtaustrittsfläche erzielen, wenn diese zumindest in erster Näherung eine Krümmung aufweist, die durch einen Krümmungsradius beschrieben ist, der größer ist als die Hälfte des Durchmessers des Lichtaustrittsbereichs und kleiner als das Doppelte des Durchmessers des Lichtaustrittsbereichs.According to the invention, a light exit region of the luminaire is formed by an edge of the reflector, which has a diameter. In this case, a particularly advantageous shape of the surface or the light exit surface can be achieved if it has, at least to a first approximation, a curvature which is described by a radius of curvature which is greater than half the diameter of the light exit region and less than twice the diameter of the light emission area.

Vorzugsweise weist das lichtbrechende Element weiterhin eine weitere Oberfläche auf, wobei die weitere Oberfläche eine Lichteintrittsfläche des lichtbrechenden Elements für das Licht bildet. Dabei lässt sich insbesondere eine besonders kleine Bauform der Leuchte erzielen, wenn die weitere Oberfläche zumindest in erster Näherung konvex gewölbt geformt ist.Preferably, the refractive element further comprises a further surface, wherein the further surface forms a light entry surface of the refractive element for the light. In this case, in particular a particularly small design of the luminaire can be achieved if the further surface is convexly curved, at least to a first approximation.

Vorzugsweise weist das lichtbrechende Element im Wesentlichen die Form einer gekrümmten Scheibe oder einer Linse auf, wobei es derart geformt ist, dass es zwischen der Oberfläche und der weiteren Oberfläche eine Dicke bzw. Stärke aufweist, die um weniger als 100%, vorzugsweise um weniger als 50%, besonders bevorzugt um weniger als 30% variiert. Das lichtbrechende Element lässt sich auf diese Weise besonders "dünn" und damit raumsparend gestalten.Preferably, the refractive element is substantially in the shape of a curved disk or lens, being shaped to have a thickness between the surface and the further surface that is less than 100%, preferably less than 50%, more preferably less than 30%. The refractive element can be made in this way "thin" and thus space-saving.

Herstellungstechnisch vorteilhaft ist das lichtbrechende Element als ein Spritzgussteil gestaltet. Auf diese Weise lässt sich insbesondere die Form des lichtbrechenden Elements besonders gut an die Form des Reflektors anpassen.Manufacturing technology advantageous the refractive element is designed as an injection molded part. In this way, in particular the shape of the refractive element can be adapted particularly well to the shape of the reflector.

Erfindungsgemäß ist das lichtbrechende Element unmittelbar an einen reflektierenden Innenwandbereich des Reflektors angrenzend angeordnet. Hierdurch lässt sich ein besonders unmittelbares optisches Zusammenwirken zwischen dem lichtbrechenden Element einerseits und dem Reflektor andererseits erzielen. Dabei weist das lichtbrechende Element angeformte Halteelemente auf, die zur Halterung des lichtbrechenden Elements an dem Reflektor in entsprechend korrespondierende Ausnehmungen des Reflektors eingreifen.According to the invention, the refractive element is arranged directly adjacent to a reflective inner wall region of the reflector. In this way, a particularly direct optical interaction between the refractive element on the one hand and the reflector on the other hand can be achieved. In this case, the light-refracting element has molded-on holding elements, which engage in support of the refractive element on the reflector in correspondingly corresponding recesses of the reflector.

Vorzugsweise umfasst die Lichtquelle wenigstens eine LED. Dies ist insbesondere vorteilhaft mit Bezug auf die Baugröße der Leuchte und die Lebensdauer und den Wirkungsgrad der Lichtquelle.Preferably, the light source comprises at least one LED. This is particularly advantageous with respect to the size of the lamp and the life and efficiency of the light source.

Erfindungsgemäß ist durch den Rand des Reflektors eine Ebene festlegt, wobei die Lichtquelle eine Platine aufweist, die in einer weiteren Ebene ausgerichtet angeordnet ist und wobei die weitere Ebene mit der zuerst genannten Ebene einen Winkel einschließt, der zwischen 40° und 80° beträgt, vorzugsweise zwischen 50° und 70°. Auf diese Weise eignet sich die Leuchte besonders gut zur "schrägen" Abgabe von Licht. Insbesondere eignet sich die Leuchte, wenn sie als Wandfluter gestaltet ist. Besonders vorteilhaft kann sie als Einbauleuchte gestaltet sein.According to the invention, a plane is defined by the edge of the reflector, wherein the light source has a board which is arranged aligned in a further plane and wherein the further plane with the first-mentioned plane encloses an angle which is between 40 ° and 80 °, preferably between 50 ° and 70 °. In this way, the lamp is particularly well suited for "oblique" delivery of light. In particular, the lamp is suitable if it is designed as a wall washer. Particularly advantageous, it can be designed as a recessed light.

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

Fig. 1
eine perspektivische Skizze einer erfindungsgemäßen Leuchte,
Fig. 2
eine Querschnitt-Skizze durch die Leuchte und
Fig. 3
eine geschnittene, perspektivische Skizze zur Relativanordnung zwischen dem lichtbrechenden Element und dem Reflektor.
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 lamp according to the invention,
Fig. 2
a cross-sectional sketch through the lamp and
Fig. 3
a cut, perspective sketch for relative arrangement between the refractive element and the reflector.

Fig. 1 zeigt eine perspektivische Skizze einer erfindungsgemäßen Leuchte. Beim hier gezeigten Ausführungsbeispiel ist die Leuchte als "Wandfluter" bzw. "Wallwasher" gestaltet. Eine solche Leuchte ist dafür vorgesehen, einen Wandbereich zu beleuchten. Sie kann beispielsweise dafür vorgesehen sein, zum Betrieb an oder in einer Raumdecke angeordnet zu werden und einen, an die Raumdecke angrenzenden, vertikalen Wandabschnitt von schräg oben zu beleuchten. Die Leuchte kann also dementsprechend als Anbauleuchte oder - wie im hier gezeigten Beispiel der Fall - als Einbauleuchte gestaltet sein. Fig. 1 shows a perspective sketch of a lamp according to the invention. In the embodiment shown here, the lamp is designed as a "wall washer" or "Wallwasher". Such a lamp is intended to illuminate a wall area. It can be provided, for example, to be arranged for operation on or in a room ceiling and to illuminate a, adjacent to the ceiling, vertical wall portion of obliquely above. Accordingly, the luminaire can accordingly be designed as a surface-mounted luminaire or, as in the example shown here, as a recessed luminaire.

Fig. 2 zeigt einen Querschnitt durch die Leuchte. Beispielsweise kann die Leuchte dafür vorgesehen bzw. gestaltet sein, zum Betrieb über einen Einbauring 4 in einer Einbauöffnung eines Wandelements 5, bzw. eines Deckenelements gehalten zu werden. Fig. 2 shows a cross section through the lamp. For example, the luminaire can be provided or designed to be held for operation via a mounting ring 4 in an installation opening of a wall element 5, or a ceiling element.

Die Leuchte weist eine Lichtquelle 1 zur Erzeugung eines Lichts auf. Beim hier gezeigten Beispiel umfasst die Lichtquelle 1 wenigstens eine LED. Insbesondere kann die wenigstens eine LED auf einer Platine 6 angeordnet vorgesehen sein. Vorzugsweise ist die Platine 6 plattenförmig gestaltet und weist eine Oberfläche auf, auf der die wenigstens eine LED angeordnet ist, wobei die Oberfläche eine Flächennormale aufweist, durch die eine Hauptabstrahlrichtung R der Lichtquelle 1 festgelegt ist.The luminaire has a light source 1 for generating a light. In the example shown here, the light source 1 comprises at least one LED. In particular, the at least one LED can be provided arranged on a circuit board 6. Preferably, the board 6 is designed plate-shaped and has a surface on which the at least one LED is arranged, wherein the surface has a surface normal, by which a main emission R of the light source 1 is fixed.

Weiterhin umfasst die Leuchte einen Reflektor 2 zur Beeinflussung, insbesondere zur Beeinflussung des Richtungsverhaltens des Lichts. Vorzugsweise weist der Reflektor 2 einen Rand 7 auf, durch den ein Lichtaustrittsbereich der Leuchte mit einem Durchmesser D gebildet ist. Der Lichtaustrittsbereich muss im Allgemeinen nicht kreisförmig sein. Mit "Durchmesser" sei im Fall eines nicht-kreisförmigen Lichtaustrittsbereichs die größte Erstreckung des Lichtaustrittsbereichs bezeichnet.Furthermore, the lamp comprises a reflector 2 for influencing, in particular for influencing the directional behavior of the light. Preferably, the reflector 2 has an edge 7, through which a light exit region of the lamp is formed with a diameter D. The light exit area generally need not be circular. In the case of a non-circular light exit region, the term "diameter" denotes the greatest extent of the light exit region.

Im gezeigten Beispiel ist der Rand 7 des Reflektors 2 in einer Ebene E verlaufend gestaltet. Die plattenförmige Platine 6 ist dabei in einer weiteren Ebene E' ausgerichtet angeordnet, wobei diese weitere Ebene E' mit der zuerst genannten Ebene E einen Winkel α einschließt, der vorzugsweise zwischen 40° und 80°, beispielsweise zwischen 50° und 70° beträgt. Beispielsweise kann der Winkel zwischen 58° und 62° betragen.In the example shown, the edge 7 of the reflector 2 is designed to extend in a plane E. The plate-shaped plate 6 is arranged aligned in a further plane E ', said further plane E' with the first-mentioned plane E forms an angle α , preferably between 40 ° and 80 °, for example between 50 ° and 70 °. For example, the angle may be between 58 ° and 62 °.

Weiterhin weist die Leuchte ein lichtbrechendes Element 3 zur weiteren Beeinflussung des Lichts auf. Das lichtbrechende Element 3 ist gekrümmt geformt und weist eine, mit einer Prismenstruktur versehene Oberfläche 32 auf. Vorzugsweise ist vorgesehen, dass sich die Prismensstruktur über die gesamte Oberfläche 32 hinweg erstreckt.Furthermore, the lamp has a refractive element 3 for further influencing the light. The refractive element 3 is curved in shape and has a surface 32 provided with a prismatic structure. It is preferably provided that the prism structure extends over the entire surface 32.

Bei der Prismenstruktur handelt es sich vorzugsweise um eine Mikroprismenstruktur. Das lichtbrechende Element 3 ist vorzugsweise so gestaltet, dass es, insbesondere durch eine Wirkung der Prismensstruktur, zur Entblendung des, von der Lichtquelle 1 erzeugten Lichts dient.The prism structure is preferably a microprism structure. The refractive element 3 is preferably designed so that it serves, in particular by an action of the prism structure, to glare the light generated by the light source 1.

Durch die Oberfläche 32 des lichtbrechenden Elements 3 ist vorzugsweise eine Lichtaustrittsfläche des lichtbrechenden Elements 3 für das, von der Lichtquelle 1 erzeugte Licht gebildet.The surface 32 of the refractive element 3 preferably forms a light exit surface of the refractive element 3 for the light generated by the light source 1.

Durch das lichtbrechende Element 3 in Verbindung mit dem Reflektor 2 lässt sich das, von der Lichtquelle 1 erzeugte Licht unter besonders flachen Winkeln insbesondere so auf einen zu beleuchtenden Wandbereich lenken, dass dieser über seine gesamte Höhe hinweg besonders gleichmäßig beleuchtet wird.By means of the refractive element 3 in conjunction with the reflector 2, the light generated by the light source 1 can be directed, particularly at particularly shallow angles, to a wall area to be illuminated in such a way that it is illuminated uniformly over its entire height.

Fig. 3 zeigt eine geschnittene, perspektivische Skizze, die die Relativanordnung zwischen dem Reflektor 2 und dem lichtbrechenden Element 3 beispielhaft verdeutlicht. Die Oberfläche 32 des lichtbrechenden Elements 3 bzw. die Lichtaustrittsfläche ist vorzugsweise zumindest in erster Näherung konkav gewölbt geformt. Mit "in erster Näherung" sei dabei insbesondere zum Ausdruck gebracht, dass die Form der Oberfläche 32 insgesamt betrachtet beschrieben ist, also jedenfalls unter Vernachlässigung der Prismenstruktur, die auf der Oberfläche 32 ausgebildet ist. Fig. 3 shows a sectional, perspective sketch, which illustrates the relative arrangement between the reflector 2 and the refractive element 3 by way of example. The surface 32 of the refractive element 3 or the light exit surface is preferably concavely curved, at least to a first approximation. By "in a first approximation" is hereby expressed in particular that the shape of the surface 32 is described in its entirety, ie in any case neglecting the prismatic structure formed on the surface 32.

Vorzugsweise ist die Form des lichtbrechenden Elements 3, insbesondere die Form der Oberfläche 32 bzw. der Lichtaustrittsfläche auf die Ausgestaltung des Reflektors 2 abgestimmt. Hierzu kann insbesondere vorgesehen sein, dass die Oberfläche 32 zumindest in erster Näherung eine Krümmung aufweist, die durch einen Krümmungsradius beschrieben ist, der größer ist als die Hälfte des Durchmessers D des Lichtaustrittsbereichs und kleiner als das Doppelte des Durchmessers des Lichtaustrittsbereichs.Preferably, the shape of the refractive element 3, in particular the shape of the surface 32 or the light exit surface is matched to the design of the reflector 2. For this purpose, it may be provided, in particular, that the surface 32 at least to a first approximation has a curvature which is described by a radius of curvature which is greater than half the diameter D of the light exit region and less than twice the diameter of the light exit region.

Im gezeigten Beispiel weist die Oberfläche 32 die genannte Krümmung in einer Schnittebene auf, die sowohl normal zu der Ebene E, als auch normal zu der weiteren Ebene E' orientiert ist; diese Schnittebene entspricht also der Zeichenebene der Fig. 2. Die Oberfläche 32 kann weiterhin derart gestaltet bzw. geformt sein, dass sie in einem weiteren Schnitt betrachtet, der normal zu der Ebene E und normal zu der genannten Schnittebene gelegt ist, nicht gekrümmt ist oder eine geringere Krümmung aufweist.In the example shown, the surface 32 has said curvature in a sectional plane which is oriented both normal to the plane E and normal to the further plane E '; this section plane corresponds to the plane of the drawing Fig. 2 , The surface 32 may also be shaped to be viewed in a further section normal to the plane E and normal to said section plane, not curved, or having a lesser curvature.

Weiterhin vorzugsweise weist das lichtbrechende Element 3 außerdem eine weitere Oberfläche 31 aufweist, die eine Lichteintrittsfläche des lichtbrechenden Elements 3 für das, von der Lichtquelle erzeugte Licht bildet. Diese weitere Oberfläche 31 ist dabei vorzugsweise zumindest in erster Näherung konvex gewölbt geformt. Hierdurch lässt sich das lichtbrechende Element 3 besonders kleinräumig gestalten.Further preferably, the refractive element 3 also has a further surface 31 which forms a light entry surface of the refractive element 3 for the light generated by the light source. This further surface 31 is preferably convexly curved, at least to a first approximation. As a result, the refractive element 3 can be made particularly small-scale.

Insbesondere kann das lichtbrechende Element 3 die Form einer gekrümmten Scheibe oder einer Linse aufweisen, die über ihre Gesamterstreckung hinweg eine im Wesentlichen gleichmäßige Dicke bzw. Stärke aufweist. Insbesondere kann das lichtbrechende Element 3 derart geformt sein, dass es zwischen der Oberfläche 32 und der weiteren Oberfläche 31 - bzw. zwischen der Lichtaustrittsfläche und der Lichteintrittsfläche - eine Stärke d aufweist, die um weniger als 100%, vorzugsweise um weniger als 50%, besonders bevorzugt um weniger als 30% variiert.In particular, the refractive element 3 may take the form of a curved disk or lens having a substantially uniform thickness over its entire extension. In particular, the refractive element 3 may be shaped such that it has, between the surface 32 and the further surface 31 - or between the light exit surface and the light entry surface - a thickness d which is less than 100%, preferably less than 50%, most preferably varies less than 30%.

Vorzugsweise ist das lichtbrechende Element 3 unmittelbar an einen reflektierenden Innenwandbereich 21 des Reflektors 2 angrenzend angeordnet. Auf diese Weise lässt sich ein optisches Zusammenwirken von dem lichtbrechenden Element 3 mit dem Reflektor 2 besonders unmittelbar und somit wirkungsvoll gestalten. Beim gezeigten Beispiel ist die Gestaltung derart, dass das optische Element 3 einen Rand aufweist, der allseits an den Innenwandbereich 21 des Reflektors 2 angrenzt, wie aus Fig. 1 andeutungsweise hervorgeht.Preferably, the refractive element 3 is disposed directly adjacent to a reflective inner wall portion 21 of the reflector 2. In this way, an optical interaction of the refractive element 3 with the reflector 2 can be made particularly direct and thus effective. In the example shown, the design is such that the optical element 3 has an edge that is generally adjacent to the inner wall region 21 of the reflector 2, as shown Fig. 1 suggestively.

Das lichtbrechende Element 3 ist vorzugsweise als Spritzgussteil gestaltet. Auf diese Weise lässt sich die Form des lichtbrechenden Elements 3 besonders gut an die Form des Reflektors 2, insbesondere an die Form des reflektierenden Innenwandbereichs 21 anpassen. Die Herstellung durch Spritzen ist zudem vorteilhafter, insbesondere preisgünstiger als eine Herstellung durch Fräsen.The refractive element 3 is preferably designed as an injection molded part. In this way, the shape of the refractive element 3 can be adapted particularly well to the shape of the reflector 2, in particular to the shape of the reflective inner wall region 21. The production by spraying is also more advantageous, in particular less expensive than a production by milling.

Vorzugsweise besteht der Reflektor 2 aus einem Metall und das lichtbrechende Element 3 aus einem Kunststoff.Preferably, the reflector 2 consists of a metal and the refractive element 3 made of a plastic.

Das lichtbrechende Element 3 kann angeformte, insbesondere an der weiteren Oberfläche 31 angeformte Halteelemente 35 aufweisen, die zur Halterung des lichtbrechenden Elements 3 an dem Reflektor 2 in entsprechend korrespondierende Ausnehmungen des Reflektors 2 eingreifen.The light-refracting element 3 may have integrally formed, in particular on the further surface 31 integrally formed holding elements 35 which engage for holding the refractive element 3 on the reflector 2 in correspondingly corresponding recesses of the reflector 2.

Das lichtbrechende Element 3 kann so gestaltet sein, dass es mit Bezug auf das von der Lichtquelle 1 erzeugte Licht einen Vergrößerungsfaktor aufweist, der zwischen 5 und 20, beträgt, beispielsweise etwa 10.The refractive element 3 may be designed to have a magnification factor of between 5 and 20, for example about 10, with respect to the light generated by the light source 1.

Claims (11)

  1. Luminaire comprising:
    - a light source (1) for producing light,
    - a reflector (2) for influencing the light and
    - a refractive element (3) for further influencing the light,
    wherein the refractive element (3) is curved in shape and comprises a surface (32),
    wherein the luminaire is so designed that the surface (32) forms a light emitting surface of the refractive element (3) for the light, wherein the surface (32) is concavely curved, at least in an initial approximation,
    wherein a light emitting region of the luminaire is formed by an edge (7) of the reflector (2), which has a diameter (D),
    wherein a plane (E) is defined by the edge (7) of the reflector (2), characterized in that
    the surface (32) of the refractive element (3) is provided with a prism structure,
    wherein the light source (1) comprises a board (6) arranged aligned in a further plane (E'), wherein a normal of the further plane (E') forms an angle (α) between 40° and 80° with the first-mentioned plane (E),
    wherein the refractive element (3) is directly adjacent to a reflective inner wall section (21) of the reflector (2),
    wherein the refractive element (3) comprises integrally-formed retaining elements (35) which engage in corresponding recesses of the reflector (2) to hold the refractive element (3) on the reflector (2).
  2. Luminaire according to claim 1, wherein the prism structure is a microprism structure.
  3. Luminaire according to one of the preceding claims, wherein the surface (32) of the refractive element (3) comprises a curvature at least approximately defined by a radius of curvature greater than half the diameter (D) of the light emitting area and less than twice the diameter (D) the light emitting area.
  4. Luminaire according to one of the preceding claims, wherein the refractive element (3) further comprises a further surface (31), wherein the further surface (31) forms a light entry surface of the refractive element (3) for the light.
  5. Lamp according to claim 4, wherein the further surface (31) is convexly curved, at least in an initial approximation.
  6. Luminaire according to claim 4 or 5, wherein the refractive element (3) substantially comprises the shape of a curved disc or lens, which is designed to have a thickness (d) between the surface (32) and the further surface (31), which is less than about 100%, preferably less than 50%, more preferably less than 30%.
  7. Luminaire according to one of the preceding claims, wherein the refractive element (3) is designed as an injection molded part.
  8. Luminaire according to one of the preceding claims, wherein the light source (L) comprises at least one LED.
  9. Luminaire according to one of the preceding claims, wherein the angle (α) lies between 50° and 70°.
  10. Luminaire according to one of the preceding claims wherein it is in the form of a wall washer.
  11. Luminaire according to one of the preceding claims wherein it is in the form of a recessed light.
EP14741886.7A 2013-07-22 2014-07-22 Luminaire having a curved prism structure element Active EP3030829B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202013103270.0U DE202013103270U1 (en) 2013-07-22 2013-07-22 Luminaire with a curved prismatic structure element
PCT/EP2014/065706 WO2015011133A1 (en) 2013-07-22 2014-07-22 Luminaire having a curved prism structure element

Publications (2)

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EP3030829A1 EP3030829A1 (en) 2016-06-15
EP3030829B1 true EP3030829B1 (en) 2018-03-28

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US (1) US20160153629A1 (en)
EP (1) EP3030829B1 (en)
CN (1) CN105531530A (en)
DE (1) DE202013103270U1 (en)
WO (1) WO2015011133A1 (en)

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JP1523888S (en) * 2014-08-28 2015-05-18
DE202016107411U1 (en) 2016-12-28 2018-04-03 Zumtobel Lighting Gmbh Refractive optics with free-form body

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DE202013103270U1 (en) 2014-10-23
EP3030829A1 (en) 2016-06-15
WO2015011133A1 (en) 2015-01-29
CN105531530A (en) 2016-04-27
US20160153629A1 (en) 2016-06-02

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