EP2871411B2 - Optical element for a lamp, and lamp - Google Patents

Optical element for a lamp, and lamp Download PDF

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Publication number
EP2871411B2
EP2871411B2 EP14191613.0A EP14191613A EP2871411B2 EP 2871411 B2 EP2871411 B2 EP 2871411B2 EP 14191613 A EP14191613 A EP 14191613A EP 2871411 B2 EP2871411 B2 EP 2871411B2
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EP
European Patent Office
Prior art keywords
light
optical element
luminaire
lens
lens element
Prior art date
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Active
Application number
EP14191613.0A
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German (de)
French (fr)
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EP2871411A1 (en
EP2871411B1 (en
Inventor
Tanja ILIC
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Zumtobel Lighting GmbH Austria
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Zumtobel Lighting GmbH Austria
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Application filed by Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
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Classifications

    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • 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
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • 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
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • 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
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
    • 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
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • 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 an LED lamp (LED: light-emitting diode) with such an optical element.
  • a grid luminaire is known from the prior art, which comprises several grid cells or cells for short, from which the light emitted by the luminaire emerges. With such a luminaire, light is emitted in a targeted manner over the cell areas, the cells overall extending over a larger total surface area.
  • a lens and a reflector In order to achieve a suitable glare control of the light emerging from a cell in a louvre luminaire, it is necessary to use a lens and a reflector.
  • a corresponding lens which has an approximately truncated pyramid or truncated cone shape, a recess being provided which is designed to accommodate an LED or a group of LEDs.
  • the lens On the side opposite this recess, the lens has a curved surface on which the light emitted by the LED or the LED group is refracted.
  • the lateral areas of the frustoconical lens element serve for total reflection of the light.
  • a reflector is also required to achieve the desired glare control.
  • the support structure comprises support elements which are formed in one piece with the optical body.
  • the invention is based on the object of specifying a lamp with a corresponding, improved optical element; in particular, the optical element should enable cost-effective production.
  • an element which has at least one lens element which consists of a first material and a holding element which consists of a second material, the second material differing in its optical properties from the first material.
  • the at least one lens element and the holding element are designed to be integrated in such a way that the optical element is in one piece.
  • the holding element opens up the possibility of realizing a reflector function of the optical element, the integrated design enabling a one-piece design that is advantageous in terms of manufacturing technology together with the at least one lens element.
  • the optical element can be designed as an effective contact protection element for the luminaire.
  • the first material and the second material are preferably made using the same basic material, for example polycarbonate.
  • the first material is preferably formed using a first base material, for example polymethyl methacrylate
  • the second material is formed using a second base material that is different therefrom, for example polycarbonate.
  • the holding element is formed by overmolding the at least one lens element. This further facilitates production.
  • the at least one lens element is preferably optically clear; the holding element preferably has a white surface. This design enables a particularly high degree of photometric efficiency of the optical element to be achieved.
  • the at least one lens element has a light entry side and, opposite thereto, a light exit side, the light entry side in particular having a concave curvature for receiving at least one LED. This is advantageous in terms of lighting technology.
  • the holding element is a reflector element and the optical element is designed in such a way that light entering via the light entry side can exit the at least one lens element via the light exit side and subsequently strike the reflector element. This enables a particularly suitable reflector function of the optical element to be implemented.
  • the optical element is also designed in such a way that further light entering via the light entry side leaves the at least one lens element via the light exit side can without hitting the reflector element further on. This is advantageous with regard to the photometric efficiency of the optical element.
  • the optical element is designed in the shape of a pot and forms a cover for the lamp.
  • the optical element can be configured particularly suitably as a touch protection element of the lamp.
  • the holding element preferably has latching elements, in particular for a latching connection with an LED circuit board of the light or a housing of the light. This enables a mechanical connection between the optical element and the LED circuit board or the housing of the lamp that is particularly simple to produce.
  • the luminaire preferably also has a circuit board, the at least one LED being arranged on the circuit board and the circuit board being connected to the optical element via a latching connection.
  • Fig. 1 shows a perspective sketch of an embodiment of an optical element.
  • the optical element is designed to be used as part of a lamp, to influence a light that is emitted by LEDs, which form a light source of the lamp. It can be provided that the optical element represents the only effective optical element of the lamp for influencing the light emitted by the LEDs.
  • the optical element comprises at least one lens element 1, here several lens elements 1 and a holding element 2.
  • the optical element can have a total of more than five or more than ten lens elements 1.
  • the lens elements 1 consist of a first material and the holding element 2 consists of a second material, the second material differing from the first material in terms of its optical properties.
  • the first material and the second material are formed using the same basic material;
  • the base material can in particular be polycarbonate.
  • the first material can be, for example, clear or transparent or translucent polycarbonate and the second material can be a treated polycarbonate, for example a colored or coated polycarbonate, so that the second material is not translucent or opaque.
  • the first material is formed using a first base material, for example polymethyl methacrylate
  • the second material is formed using a second base material that is different therefrom, for example polycarbonate.
  • Each of the lens elements 1 is intended to influence the light of one or more of the LEDs of the lamp.
  • the lens elements 1 are preferably each surrounded by the holding element 1 in a ring shape, in such a way that the holding element 2 forms a holding frame for the lens elements 1.
  • the at least one lens element 1 and the holding element 2 are designed to be integrated in such a way that the optical element is in one piece.
  • the optical element represents a one-piece or one-piece component of the luminaire, which can advantageously be manufactured and enables easier assembly of the luminaire.
  • the holding element 2 is formed by overmolding the at least one lens element 1.
  • the at least one lens element 1 can first be arranged in a corresponding injection molding tool and then the holding element 1 can be produced by injection molding with the aid of this injection molding tool.
  • the optical element can be produced, for example, by a two-component injection molding process.
  • the first and the second material preferably form the two components.
  • the first material of which the at least one lens element 1 is made can be, for example, polymethyl methacrylate (PMMA), and the second material can be polycarbonate.
  • the at least one optical lens element 1 is preferably designed to be optically clear.
  • the holding element 2 can advantageously have a white surface in terms of lighting technology;
  • the holding element 2 is preferably designed to be opaque. In this way it can be achieved that the holding element 2 has suitable reflector properties.
  • the overall optical element is designed in the shape of a pot.
  • it can comprise a first part 81, through which a bottom part of the pot shape is formed, and a second part 82, through which an in particular ring-shaped circumferential side wall region of the pot shape is formed.
  • the at least one lens element 1 is only designed as a best-sand part of the first part 81.
  • Fig. 2 shows a section of a cross-sectional sketch of components of a lamp according to the invention with the optical element.
  • the lamp comprises an LED circuit board 4 or circuit board 4 for short, on which LEDs 3 are arranged, which form a light source of the lamp.
  • the design is such that a light generated by the LEDs 3 is optically influenced by the optical element.
  • the lens elements 2 are advantageously arranged in such a way that they all pass through a common plane E.
  • the first part 81 of the optical element can be shaped such that it comprises or consists of a plate-shaped portion 815, the shape of which defines a further plane E ', which is preferably oriented parallel to the first-mentioned plane E, and at least a cell area 7, here several cell areas 7, each of the cell areas 7 comprising exactly one of the lens elements 1.
  • the cell areas 7 are designed in such a way that they are designed to lift out of the plane E ', namely in such a way that they penetrate the first-mentioned level E , in particular with the respective associated lens element 1.
  • the cell areas 7 can advantageously allow cells in the Sense of a grid light be formed.
  • the first part 81 of the optical element preferably comprises at least one ring area 816, here several ring areas 816, each of the cell areas 7 including exactly one of the ring areas 816.
  • the at least one ring area 816 is preferably designed as part of the holding element 2.
  • Each cell area 7 thus comprises exactly one of the lens elements 1 and exactly one of the ring areas 816.
  • the ring area 816 of a cell area 7 is formed in a ring shape surrounding the associated lens element 1.
  • This ring area 816 is preferably designed with a surface which points inwardly with respect to the ring shape and which is reflective for light, so that a reflector for the relevant cell area 7 is formed by the ring area 816.
  • this inwardly facing surface of the ring area 816 is preferably designed in such a way that it is shaped to diverge in the direction of the plane E ′.
  • the ring area 816 preferably extends up to the plane E 'and in the latter forms an edge area of an opening of the relevant cell area 7, which is provided for the passage of light.
  • the opening or the edge region forming the opening can, for example, be circular or, to a first approximation, rectangular, preferably square.
  • the entire holding element 2 is designed as a reflector element.
  • the ring area 816 of a cell area 7 preferably surrounds the lens element 1 in question, closed in a ring shape and contacting on all sides, so that no through opening is formed between the lens element 1 and the adjoining ring area 215.
  • the design is such that the ring area 816 forms a further opening in the plane E which is closed by the lens element 1 in question. Due to the ring-shaped contact area between the ring area 816 on the one hand and the lens element 1 on the other hand, this is advantageous both with regard to the cohesion between the lens element 1 in question and the holding element 2 and also advantageous with regard to the optical properties of the cell area 7.
  • the optical element is particularly suitable for being designed as a cover for the lamp.
  • this design enables the optical element to form a contact protection element for the light, which protects both the LEDs 3 from unintentional contact and a user of the light from unintentional contact with the LEDs 3 or the circuit board 4, on which the LEDs 3 are arranged, is protected.
  • an LED circuit board can generally have live parts to which a voltage of 230 V, for example, is applied.
  • the at least one lens element 1 can in principle be shaped as is known from the prior art described at the beginning. It preferably has a light entry side 15 and, opposite thereto, a light exit side 16.
  • the light entry side 15 preferably has a concave curvature or a recess for receiving at least one of the LEDs 3 of the lamp.
  • the optical element is preferably designed in such a way that light L1 entering via the light entry side 15 can exit the at least one lens element 1 via the light exit side 16 and then onto the holding element 2 designed as a reflector element Element 2, in particular, impinges on the corresponding ring area 816 of the holding element 2, in particular in such a way that it is reflected there and furthermore leaves the relevant cell area 7 and the lamp as a whole.
  • the optical element is preferably designed in such a way that light L1 entering via the light entry side 15 can exit the at least one lens element 1 via the light exit side 16 and then onto the holding element 2 designed as a reflector element Element 2, in particular, impinges on the corresponding ring area 816 of the holding element 2, in particular in such a way that it is reflected there and furthermore leaves the relevant cell area 7 and the lamp as a whole.
  • the optical element is preferably designed in such a way that light L1 entering via the light entry side 15 can exit the at least one lens element 1 via the light exit side 16
  • the optical element is also designed in such a way that - as indicated by a further exemplary light beam L2 - a further light L2 entering via the light entry side 15 can exit the at least one lens element 1 via the light exit side 16 without subsequently affecting the holding- Element 2 or any other part of the light fitting, in particular without striking the relevant ring area 816. This is advantageous with regard to the efficiency of the luminaire.
  • the cell areas 7 are preferably all designed identically.
  • Fig. 3 shows a perspective detailed sketch according to a variant.
  • the optical element preferably has latching elements for a latching connection V with the LED board 4 of the lamp.
  • the LEDs 3, which are arranged in the recesses of the lens elements 1, are preferably LEDs 3 of this LED board 4.
  • the LED board 4 is preferably arranged in the luminaire oriented parallel to the plane E, in particular on one, the plane E. 'opposite side of level E.
  • the design is preferably such that the LED board 4 makes contact with the lens elements 1, in particular makes contact with the edges of the recesses of the light entry sides 15.
  • the optical element when it is connected to the LED circuit board 4 via the latching connection V , forms a particularly effective contact protection element for the LEDs 3.
  • the design is such that the light emitted by the LEDs 3 of the LED circuit board 4 enters the lens elements 1 without being influenced beforehand by a further optical element.
  • the second part 82 of the optical element, through which the annular circumferential side wall area is formed, can also have latching elements for connection to at least one further component of the luminaire, in particular on an edge area of the side wall area facing away from plane E '.
  • the further component of the light can, for example, again be the LED circuit board 4 or a housing of the light.
  • the side wall region preferably extends from plane E 'to plane E, in particular in such a way that it penetrates plane E in an annularly closed manner.
  • the optical element shown can be produced particularly inexpensively; In addition, the optical element can be used to form a particularly suitable protection against contact for the luminaire. With a lamp that is provided with this optical element, a light emission can be achieved as with a conventional louvre lamp.

Description

Die Erfindung betrifft eine LED-Leuchte (LED: Licht emittierende Diode) mit einem solchen optischen Element.The invention relates to an LED lamp (LED: light-emitting diode) with such an optical element.

Aus dem Stand der Technik ist eine Rasterleuchte bekannt, die mehrere Rasterzellen oder kurz Zellen umfasst, aus denen das von der Leuchte abgegebene Licht austritt. Mit einer solchen Leuchte wird gezielt über die Zellenbereiche Licht abgegeben, wobei sich die Zellen insgesamt über einen größeren Gesamtflächenbereich hinweg verteilt erstrecken.A grid luminaire is known from the prior art, which comprises several grid cells or cells for short, from which the light emitted by the luminaire emerges. With such a luminaire, light is emitted in a targeted manner over the cell areas, the cells overall extending over a larger total surface area.

Um bei einer Rasterleuchte eine geeignete Entblendung des aus einer Zelle austretenden Lichts zu erzielen, ist es erforderlich, eine Linse und einen Reflektor einzusetzen. Hierzu ist eine entsprechende Linse bekannt, die eine etwa pyramidenstumpfartige bzw. kegelstumpfartige Form aufweist, wobei eine Ausnehmung vorgesehen ist, die zur Aufnahme einer LED oder einer Gruppe von LEDs ausgestaltet ist. An der, dieser Ausnehmung gegenüberliegenden Seite weist die Linse eine gekrümmte Oberfläche auf, an der das von der LED bzw. der LED-Gruppe abgegebene Licht eine Brechung erfährt. Die seitlichen Bereiche des kegelstumpfartigen Linsenelements dienen zur Totalreflexion des Lichts.In order to achieve a suitable glare control of the light emerging from a cell in a louvre luminaire, it is necessary to use a lens and a reflector. For this purpose, a corresponding lens is known which has an approximately truncated pyramid or truncated cone shape, a recess being provided which is designed to accommodate an LED or a group of LEDs. On the side opposite this recess, the lens has a curved surface on which the light emitted by the LED or the LED group is refracted. The lateral areas of the frustoconical lens element serve for total reflection of the light.

Allerdings ist zur Erzielung einer gewünschten Entblendung, wie erwähnt, außer der Linse noch ein Reflektor erforderlich.However, as mentioned, in addition to the lens, a reflector is also required to achieve the desired glare control.

Aus der WO 03/048637 A1 ist ein Beleuchtungsmodul mit einem optischen Körper und einer Stützstruktur bekannt. Die Stützstruktur umfasst Stützelemente, die aus einem Stück mit dem optischen Körper gebildet sind.From the WO 03/048637 A1 a lighting module with an optical body and a support structure is known. The support structure comprises support elements which are formed in one piece with the optical body.

Aus der WO 2013/142437 A1 ist eine LED-Leuchte mit einem Linsenelement und einem Maskierungselement bekannt. Das von der LED abgegebene Licht wird zunächst von dem Linsenelement beeinflusst und anschließend an dem Maskierungselement reflektiert.From the WO 2013/142437 A1 an LED light with a lens element and a masking element is known. The light emitted by the LED is first influenced by the lens element and then reflected on the masking element.

Der Erfindung liegt die Aufgabe zugrunde, eine Leuchte mit einem entsprechenden, verbesserten optischen Element anzugeben; insbesondere soll das optische Element eine kostengünstige Produktion ermöglichen.The invention is based on the object of specifying a lamp with a corresponding, improved optical element; in particular, the optical element should enable cost-effective production.

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

Gemäß der Erfindung ist Element vorgesehen, das wenigstens ein Linsenelement aufweist, das aus einem ersten Material besteht, sowie ein Halte-Element, das aus einem zweiten Material besteht, wobei sich das zweite Material in seinen optischen Eigenschaften von dem ersten Material unterscheidet. Dabei sind das wenigstens eine Linsenelement und das Halte-Element derart integriert gestaltet, dass das optische Element einteilig ist.According to the invention, an element is provided which has at least one lens element which consists of a first material and a holding element which consists of a second material, the second material differing in its optical properties from the first material. The at least one lens element and the holding element are designed to be integrated in such a way that the optical element is in one piece.

Durch das Halte-Element ist die Möglichkeit eröffnet, eine Reflektorfunktion des optischen Elements zu realisieren, wobei durch die integrierte Gestaltung eine herstellungstechnisch vorteilhafte einteilige Ausführung zusammen mit dem wenigstens einen Linsenelement ermöglicht ist. Außerdem lässt sich das optische Element aufgrund der integrierten Gestaltung als ein effektives Berührungsschutz-Element für die Leuchte gestalten.The holding element opens up the possibility of realizing a reflector function of the optical element, the integrated design enabling a one-piece design that is advantageous in terms of manufacturing technology together with the at least one lens element. In addition, due to the integrated design, the optical element can be designed as an effective contact protection element for the luminaire.

Vorzugsweise sind das erste Material und das zweite Material unter Nutzung desselben Grundstoffs, beispielsweise Polycarbonat. Alternativ ist vorzugsweise das erste Material unter Nutzung eines ersten Grundstoffs gebildet, beispielsweise Polymethylmethacrylat und das zweite Material unter Nutzung eines hiervon unterschiedlichen zweiten Grundstoffs gebildet, beispielsweise Polycarbonat. Durch eine derartige Materialwahl lassen sich besonders vorteilhaft geeignete optische Eigenschaften des optischen Elements erzielen.The first material and the second material are preferably made using the same basic material, for example polycarbonate. Alternatively, the first material is preferably formed using a first base material, for example polymethyl methacrylate, and the second material is formed using a second base material that is different therefrom, for example polycarbonate. Such a choice of material makes it possible to achieve suitable optical properties of the optical element in a particularly advantageous manner.

Erfindungsgemäß ist das Halte-Element durch ein Umspritzen des wenigstens einen Linsenelements gebildet. Hierdurch ist eine weiterhin erleichterte Herstellung ermöglicht.According to the invention, the holding element is formed by overmolding the at least one lens element. This further facilitates production.

Vorzugsweise ist das wenigstens eine Linsenelement optisch klar; das Halte-Element weist vorzugsweise eine weiße Oberfläche auf. Durch diese Gestaltung lässt sich ein besonders hoher lichttechnischer Wirkungsgrad des optischen Elements erzielen.The at least one lens element is preferably optically clear; the holding element preferably has a white surface. This design enables a particularly high degree of photometric efficiency of the optical element to be achieved.

Erfindungsgemäß weist das wenigstens eine Linsenelement eine Lichteintrittsseite und hierzu gegenüberliegend eine Lichtaustrittsseite auf, wobei insbesondere die Lichteintrittsseite eine konkave Wölbung zur Aufnahme wenigstens einer LED aufweist. Dies ist lichttechnisch vorteilhaft.According to the invention, the at least one lens element has a light entry side and, opposite thereto, a light exit side, the light entry side in particular having a concave curvature for receiving at least one LED. This is advantageous in terms of lighting technology.

Erfindungsgemäß ist das Halte-Element ein Reflektor-Element und das optische Element dabei so gestaltet, dass ein über die Lichteintrittsseite eintretendes Licht das wenigstens eine Linsenelement über die Lichtaustrittsseite verlassen kann und im Weiteren auf das Reflektor-Element auftrifft. Hierdurch lässt sich eine besonders geeignete Reflektorfunktion des optischen Elements realisieren.According to the invention, the holding element is a reflector element and the optical element is designed in such a way that light entering via the light entry side can exit the at least one lens element via the light exit side and subsequently strike the reflector element. This enables a particularly suitable reflector function of the optical element to be implemented.

Vorzugsweise ist dabei das optische Element außerdem derart gestaltet, dass ein über die Lichteintrittsseite eintretendes weiteres Licht das wenigstens eine Linsenelement über die Lichtaustrittsseite verlassen kann, ohne im Weiteren auf das Reflektor-Element aufzutreffen. Diese ist vorteilhaft mit Bezug auf den lichttechnischen Wirkungsgrad des optischen Elements.Preferably, the optical element is also designed in such a way that further light entering via the light entry side leaves the at least one lens element via the light exit side can without hitting the reflector element further on. This is advantageous with regard to the photometric efficiency of the optical element.

Erfindungsgemäß ist das optische Element Topfförmig gestaltet und bildet eine Abdeckung der Leuchte. Hierdurch lässt sich das optische Element besonders geeignet als Berührungsschutz-Element der Leuchte ausgestalten.According to the invention, the optical element is designed in the shape of a pot and forms a cover for the lamp. As a result, the optical element can be configured particularly suitably as a touch protection element of the lamp.

Vorzugsweise weist das Halte-Element Rastelemente auf, insbesondere für eine Rastverbindung mit einer LED-Platine der Leuchte oder einem Gehäuse der Leuchte. Hierdurch ist eine besonders einfach herzustellende mechanische Verbindung des optischen Elements mit der LED-Platine bzw. dem Gehäuse der Leuchte ermöglicht.The holding element preferably has latching elements, in particular for a latching connection with an LED circuit board of the light or a housing of the light. This enables a mechanical connection between the optical element and the LED circuit board or the housing of the lamp that is particularly simple to produce.

Vorzugsweise weist die Leuchte weiterhin eine Platine auf, wobei die wenigstens eine LED auf der Platine angeordnet ist und die Platine über eine Rastverbindung mit dem optischen Element verbunden ist.The luminaire preferably also has a circuit board, the at least one LED being arranged on the circuit board and the circuit board being connected to the optical element via a latching connection.

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

  • Fig. 1 eine perspektivische Skizze eines optischen Elements einer erfindungsgemäßen Leuchte,
  • Fig. 2 eine Querschnitt-Skizze durch einen Ausschnitt von Bestandteilen einer Leuchte mit dem optischen Element und
  • Fig. 3 eine perspektivische Detail-Skizze zur Verbindung zwischen dem optischen Element und der LED-Platine der Leuchte.
The invention is explained in more detail below using an exemplary embodiment and with reference to the drawings. Show it:
  • Fig. 1 a perspective sketch of an optical element of a lamp according to the invention,
  • Fig. 2 a cross-sectional sketch through a section of components of a luminaire with the optical element and
  • Fig. 3 a perspective detailed sketch of the connection between the optical element and the LED circuit board of the luminaire.

Fig. 1 zeigt eine perspektivische Skizze eines Ausführungsbeispiels eines optischen Elements. Das optische Element ist dazu ausgestaltet, als Teil einer Leuchte verwendet zu werden, zur Beeinflussung eines Lichts, das von LEDs abgegeben wird, die eine Lichtquelle der Leuchte bilden. Dabei kann vorgesehen sein, dass das optische Element das einzig wirksame optische Element der Leuchte zur Beeinflussung des von den LEDs abgegebenen Lichts darstellt. Fig. 1 shows a perspective sketch of an embodiment of an optical element. The optical element is designed to be used as part of a lamp, to influence a light that is emitted by LEDs, which form a light source of the lamp. It can be provided that the optical element represents the only effective optical element of the lamp for influencing the light emitted by the LEDs.

Das optische Element umfasst wenigstens ein Linsenelement 1, hier mehrere Linsenelemente 1 sowie ein Halte-Element 2. Beispielsweise kann das optische Element insgesamt mehr als fünf oder mehr als zehn Linsenelemente 1 aufweisen.The optical element comprises at least one lens element 1, here several lens elements 1 and a holding element 2. For example, the optical element can have a total of more than five or more than ten lens elements 1.

Die Linsenelemente 1 bestehen dabei aus einem ersten Material und das Halte-Element 2 aus einem zweiten Material, wobei sich das zweite Material von dem ersten Material in seinen optischen Eigenschaften unterscheidet.The lens elements 1 consist of a first material and the holding element 2 consists of a second material, the second material differing from the first material in terms of its optical properties.

Vorteilhaft kann vorgesehen sein, dass das erste Material und das zweite Material unter Nutzung desselben Grundstoffs gebildet sind; bei dem Grundstoff kann es sich insbesondere um Polycarbonat handeln. Dabei kann das erste Material beispielsweise klares bzw. transparentes oder transluzentes Polycarbonat sein und das zweite Material ein behandeltes Polycarbonat sein, beispielsweise ein eingefärbtes oder beschichtetes Polycarbonat, so dass das zweite Material nicht lichtdurchlässig bzw. undurchsichtig ist.It can advantageously be provided that the first material and the second material are formed using the same basic material; the base material can in particular be polycarbonate. The first material can be, for example, clear or transparent or translucent polycarbonate and the second material can be a treated polycarbonate, for example a colored or coated polycarbonate, so that the second material is not translucent or opaque.

Alternativ kann beispielsweise vorgesehen sein, dass das erste Material unter Nutzung eines ersten Grundstoffs gebildet ist, beispielsweise Polymethylmethacrylat und das zweite Material unter Nutzung eines hiervon unterschiedlichen zweiten Grundstoffs gebildet ist, beispielsweise Polycarbonat.Alternatively, it can be provided, for example, that the first material is formed using a first base material, for example polymethyl methacrylate, and the second material is formed using a second base material that is different therefrom, for example polycarbonate.

Jedes der Linsenelemente 1 ist dafür vorgesehen, das Licht einer oder mehrerer der LEDs der Leuchte zu beeinflussen. Die Linsenelemente 1 sind dabei vorzugsweise jeweils ringförmig von dem Halte-Element 1 umgeben, derart, dass das Halte-Element 2 ein haltendes Gerüst für die Linsenelemente 1 bildet.Each of the lens elements 1 is intended to influence the light of one or more of the LEDs of the lamp. The lens elements 1 are preferably each surrounded by the holding element 1 in a ring shape, in such a way that the holding element 2 forms a holding frame for the lens elements 1.

Das wenigstens eine Linsenelement 1 und das Halte-Element 2 sind dabei derart integriert gestaltet, dass das optische Element einteilig ist.The at least one lens element 1 and the holding element 2 are designed to be integrated in such a way that the optical element is in one piece.

Auf diese Weise stellt das optische Element ein einteiliges bzw. einstückig ausgebildetes Bauteil der Leuchte dar, das sich vorteilhaft herstellen lässt und einen erleichterten Zusammenbau der Leuchte ermöglicht.In this way, the optical element represents a one-piece or one-piece component of the luminaire, which can advantageously be manufactured and enables easier assembly of the luminaire.

Eine erfindungsgemäße Herstellung ist ermöglicht, indem das Halte-Element 2 durch Umspritzen des wenigstens einen Linsenelements 1 gebildet ist. Hierzu kann das wenigstens eine Linsenelement 1 zunächst in einem entsprechenden Spritzgusswerkzeug angeordnet werden und anschließend das Halte-Element 1 mithilfe dieses Spritzgusswerkzeugs durch Spritzgießen erzeugt werden. Gemäß einer nicht beanspruchten Alternative kann das optische Element beispielsweise durch ein Zweikomponenten-Spritzgussverfahren hergestellt sein. Dabei bilden vorzugsweise das erste und das zweite Material die beiden Komponenten.Production according to the invention is made possible in that the holding element 2 is formed by overmolding the at least one lens element 1. For this purpose, the at least one lens element 1 can first be arranged in a corresponding injection molding tool and then the holding element 1 can be produced by injection molding with the aid of this injection molding tool. According to an alternative not claimed, the optical element can be produced, for example, by a two-component injection molding process. The first and the second material preferably form the two components.

Bei dem ersten Material, aus dem das wenigstens eine Linsenelement 1 besteht, kann es sich beispielsweise um Polymethylmethacrylat (PMMA) handeln, bei dem zweiten Material um Polycarbonat. Dabei ist lichttechnisch vorteilhaft das wenigstens eine optische Linsenelement 1 vorzugsweise optisch klar gestaltet. Das Halte-Element 2 kann lichttechnisch vorteilhaft eine weiße Oberfläche aufweisen; vorzugsweise ist das Halte-Element 2 lichtundurchlässig gestaltet. Hierdurch lässt sich erzielen, dass das Halte-Element 2 geeignete Reflektor-Eigenschaften aufweist.The first material of which the at least one lens element 1 is made can be, for example, polymethyl methacrylate (PMMA), and the second material can be polycarbonate. In terms of lighting technology, the at least one optical lens element 1 is preferably designed to be optically clear. The holding element 2 can advantageously have a white surface in terms of lighting technology; The holding element 2 is preferably designed to be opaque. In this way it can be achieved that the holding element 2 has suitable reflector properties.

Wie beim gezeigten Beispiel der Fall, ist das optische Element insgesamt Topf-förmig gestaltet. Beispielsweise kann es einen ersten Teil 81 umfassen, durch den ein Bodenteil der Topf-Form gebildet ist und einen zweiten Teil 82, durch den ein insbesondere ringförmig umlaufender Seitenwandbereich der TopfForm gebildet ist. Im gezeigten Beispiel ist das wenigstens eine Linsenelement 1 lediglich als Bestsandteil des ersten Teils 81 ausgebildet.As is the case in the example shown, the overall optical element is designed in the shape of a pot. For example, it can comprise a first part 81, through which a bottom part of the pot shape is formed, and a second part 82, through which an in particular ring-shaped circumferential side wall region of the pot shape is formed. In the example shown, the at least one lens element 1 is only designed as a best-sand part of the first part 81.

Fig. 2 zeigt in einem Ausschnitt eine Querschnitt-Skizze von Bestandteilen einer erfindungsgemäßen Leuchte mit dem optischen Element. Insbesondere umfasst die Leuchte eine LED-Platine 4 oder kurz Platine 4, auf der LEDs 3 angeordnet sind, die eine Lichtquelle der Leuchte bilden. Dabei ist die Gestaltung derart, dass ein von den LEDs 3 erzeugtes Licht durch das optische Element optisch beeinflusst wird. Fig. 2 shows a section of a cross-sectional sketch of components of a lamp according to the invention with the optical element. In particular, the lamp comprises an LED circuit board 4 or circuit board 4 for short, on which LEDs 3 are arranged, which form a light source of the lamp. The design is such that a light generated by the LEDs 3 is optically influenced by the optical element.

Beim hier gezeigten Beispiel sind die Linsenelemente 2 vorteilhaft so angeordnet, dass sie alle eine gemeinsame Ebene E durchsetzen.In the example shown here, the lens elements 2 are advantageously arranged in such a way that they all pass through a common plane E.

Der erste Teil 81 des optischen Elements kann derart geformt sein, dass er einen plattenförmigen Anteil 815 umfasst oder aus einem solchen besteht, durch dessen Form eine weitere Ebene E' festgelegt ist, die vorzugsweise zu der zuerst genannten Ebene E parallel orientiert ist, sowie wenigstens einen Zellenbereich 7, hier mehrere Zellenbereiche 7, wobei jeder der Zellenbereiche 7 genau eines der Linsenelemente 1 umfasst. Die Zellenbereiche 7 sind dabei derart gestaltet, dass sie sich aus der Ebene E' heraus hebend gestaltet sind, und zwar derart, dass sie die zuerst genannte Ebene E durchsetzen, insbesondere mit dem jeweils zugehörigen Linsenelement 1. Durch die Zellenbereiche 7 können vorteilhaft Zellen im Sinn einer Rasterleuchte gebildet sein.The first part 81 of the optical element can be shaped such that it comprises or consists of a plate-shaped portion 815, the shape of which defines a further plane E ', which is preferably oriented parallel to the first-mentioned plane E, and at least a cell area 7, here several cell areas 7, each of the cell areas 7 comprising exactly one of the lens elements 1. The cell areas 7 are designed in such a way that they are designed to lift out of the plane E ', namely in such a way that they penetrate the first-mentioned level E , in particular with the respective associated lens element 1. The cell areas 7 can advantageously allow cells in the Sense of a grid light be formed.

Weiterhin vorzugsweise umfasst der erste Teil 81 des optischen Elements wenigstens einen Ringbereich 816, hier mehrere Ringbereiche 816, wobei jeder der Zellenbereiche 7 genau einen der Ringbereiche 816 umfasst. Der wenigstens eine Ringbereich 816 ist dabei vorzugsweise als Teil des Halte-Elements 2 gestaltet.Furthermore, the first part 81 of the optical element preferably comprises at least one ring area 816, here several ring areas 816, each of the cell areas 7 including exactly one of the ring areas 816. The at least one ring area 816 is preferably designed as part of the holding element 2.

Jeder Zellenbereich 7 umfasst also genau eines der Linsenelemente 1, sowie genau einen der Ringbereiche 816. Der Ringbereich 816 eines Zellenbereichs 7 ist dabei ringförmig das zugehörige Linsenelement 1 umgebend gebildet. Vorzugsweise ist dieser Ringbereich 816 mit einer - mit Bezug auf die Ringform - nach innen weisenden Oberfläche gestaltet, die für Licht reflektierend ist, so dass durch den Ringbereich 816 ein Reflektor für den betreffenden Zellenbereich 7 gebildet ist. Für eine besonders geeignete Reflektor-Funktion ist dabei diese nach innen weisende Oberfläche des Ringbereichs 816 vorzugsweise so gestaltet, dass sie in Richtung auf die Ebene E'zu divergierend geformt ist. Weiterhin vorzugsweise erstreckt sich der Ringbereich 816 bis zu der Ebene E' und bildet in Letzterer einen Randbereich einer Öffnung des betreffenden Zellenbereichs 7, die zum Durchtritt von Licht vorgesehen ist. Die Öffnung bzw. der die Öffnung bildende Randbereich kann beispielsweise kreisrund oder in erster Näherung rechteckig, vorzugsweise quadratisch geformt sein.Each cell area 7 thus comprises exactly one of the lens elements 1 and exactly one of the ring areas 816. The ring area 816 of a cell area 7 is formed in a ring shape surrounding the associated lens element 1. This ring area 816 is preferably designed with a surface which points inwardly with respect to the ring shape and which is reflective for light, so that a reflector for the relevant cell area 7 is formed by the ring area 816. For a particularly suitable reflector function, this inwardly facing surface of the ring area 816 is preferably designed in such a way that it is shaped to diverge in the direction of the plane E ′. Furthermore, the ring area 816 preferably extends up to the plane E 'and in the latter forms an edge area of an opening of the relevant cell area 7, which is provided for the passage of light. The opening or the edge region forming the opening can, for example, be circular or, to a first approximation, rectangular, preferably square.

Herstellungstechnisch vorteilhaft ist das gesamte Halte-Element 2 als Reflektor-Element gestaltet.From a manufacturing point of view, the entire holding element 2 is designed as a reflector element.

Vorzugsweise umschließt der Ringbereich 816 eines Zellenbereichs 7 das betreffende Linsenelement 1 ringförmig geschlossen und allseits kontaktierend, so dass keine Durchgangsöffnung zwischen dem Linsenelement 1 und dem angrenzenden Ringbereich 215 gebildet ist. Insbesondere ist die Gestaltung derart, dass der Ringbereich 816 in der Ebene E eine weitere Öffnung bildet, die durch das betreffende Linsenelement 1 verschlossen ist. Dies ist aufgrund des ringförmigen Kontaktbereichs zwischen dem Ringbereich 816 einerseits und dem Linsenelement 1 andererseits sowohl vorteilhaft mit Bezug auf den Zusammenhalt zwischen dem betreffenden Linsenelement 1 und dem Halte-Element 2, als auch vorteilhaft mit Bezug auf die optischen Eigenschaften des Zellenbereichs 7.The ring area 816 of a cell area 7 preferably surrounds the lens element 1 in question, closed in a ring shape and contacting on all sides, so that no through opening is formed between the lens element 1 and the adjoining ring area 215. In particular, the design is such that the ring area 816 forms a further opening in the plane E which is closed by the lens element 1 in question. Due to the ring-shaped contact area between the ring area 816 on the one hand and the lens element 1 on the other hand, this is advantageous both with regard to the cohesion between the lens element 1 in question and the holding element 2 and also advantageous with regard to the optical properties of the cell area 7.

Durch die Topf-Form eignet sich das optische Element besonders dazu, als Abdeckung für die Leuchte gestaltet zu werden. Zudem lässt sich durch diese Gestaltung erzielen, dass das optische Element ein Berührungsschutz-Element für die Leuchte bildet, durch das sowohl die LEDs 3 vor ungewollter Berührung geschützt sind, als auch ein Benutzer der Leuchte vor einer ungewollten Berührung der LEDs 3 bzw. der Platine 4, auf der die LEDs 3 angeordnet sind, geschützt ist. Dies ist relevant, da eine LED-Platine im Allgemeinen spannungsführende Teile aufweisen kann, die mit einer Spannung von beispielswiese 230 V beaufschlagt sind.Due to the pot shape, the optical element is particularly suitable for being designed as a cover for the lamp. In addition, this design enables the optical element to form a contact protection element for the light, which protects both the LEDs 3 from unintentional contact and a user of the light from unintentional contact with the LEDs 3 or the circuit board 4, on which the LEDs 3 are arranged, is protected. This is relevant because an LED circuit board can generally have live parts to which a voltage of 230 V, for example, is applied.

Das wenigstens eine Linsenelement 1 kann an sich grundsätzlich so geformt sein, wie es aus dem eingangs beschriebenen Stand der Technik bekannt ist. Vorzugsweise weist es eine Lichteintrittsseite 15 und hierzu gegenüberliegend eine Lichtaustrittsseite 16 auf. Vorzugsweise weist die Lichteintrittsseite 15 dabei eine konkave Wölbung bzw. eine Ausnehmung zur Aufnehme wenigstens einer der LED 3 der Leuchte auf.The at least one lens element 1 can in principle be shaped as is known from the prior art described at the beginning. It preferably has a light entry side 15 and, opposite thereto, a light exit side 16. The light entry side 15 preferably has a concave curvature or a recess for receiving at least one of the LEDs 3 of the lamp.

Wie in Fig. 2 durch einen exemplarischen Lichtstrahl L1 angedeutet, ist dabei das optische Element vorzugsweise so gestaltet ist, dass ein über die Lichteintrittsseite 15 eintretendes Licht L1 das wenigstens eine Linsenelement 1 über die Lichtaustrittsseite 16 verlassen kann und im Weiteren auf das als Reflektor-Element 2 gestaltete Halte-Element 2, insbesondere auf den entsprechenden Ringbereich 816 des Halte-Elements 2 auftrifft, insbesondere, derart, dass es dort reflektiert wird und im Weiteren den betreffenden Zellenbereich 7 und die Leuchte insgesamt verlässt. Auf diese Weise lässt sich erzielen, dass Lichtstrahlen, die die Lichtaustrittsseite 16 des Linsenelements 1 mit Bezug auf die Ebene E' unter flachen Winkeln verlassen, reflektiert werden. Hierdurch lässt sich besonders wirksam vermeiden, dass das aus dem Zellbereich 7 austretende Licht zu einer unerwünschten Blendung eines Betrachters der Leuchte führt.As in Fig. 2 indicated by an exemplary light beam L1 , the optical element is preferably designed in such a way that light L1 entering via the light entry side 15 can exit the at least one lens element 1 via the light exit side 16 and then onto the holding element 2 designed as a reflector element Element 2, in particular, impinges on the corresponding ring area 816 of the holding element 2, in particular in such a way that it is reflected there and furthermore leaves the relevant cell area 7 and the lamp as a whole. In this way it can be achieved that light rays which leave the light exit side 16 of the lens element 1 with reference to the plane E 'at flat angles are reflected. In this way, it can be particularly effectively avoided that the light emerging from the cell area 7 leads to undesirable dazzling of a viewer of the luminaire.

Lichttechnisch weiterhin vorteilhaft ist das optische Element außerdem derart gestaltet, dass - wie durch einen weiteren exemplarischen Lichtstrahl L2 angedeutet - ein über die Lichteintrittsseite 15 eintretendes weiteres Licht L2 das wenigstens eine Linsenelement 1 über die Lichtaustrittsseite 16 verlassen kann, ohne im Weiteren auf das Halte-Element 2 oder ein sonstiges Teil der Leuchte aufzutreffen, insbesondere ohne auf den betreffenden Ringbereich 816 aufzutreffen. Dies ist vorteilhaft mit Bezug auf den Wirkungsgrad der Leuchte.In terms of lighting technology, the optical element is also designed in such a way that - as indicated by a further exemplary light beam L2 - a further light L2 entering via the light entry side 15 can exit the at least one lens element 1 via the light exit side 16 without subsequently affecting the holding- Element 2 or any other part of the light fitting, in particular without striking the relevant ring area 816. This is advantageous with regard to the efficiency of the luminaire.

Die Zellenbereiche 7 sind vorzugsweise alle baugleich gestaltet.The cell areas 7 are preferably all designed identically.

Fig. 3 zeigt eine perspektivische Detail-Skizze gemäß einer Variante. Die Bezugszeichen sind dabei in analoger Weise zu oben gebraucht. Wie aus dieser Zeichnung andeutungsweise hervorgeht, weist das optische Element vorzugsweise Rastelemente für eine Rastverbindung V mit der LED-Platine 4 der Leuchte auf. Die LEDs 3, die in den Ausnehmungen der Linsenelemente 1 angeordnet sind, sind dabei vorzugsweise LEDs 3 dieser LED-Platine 4. Vorzugsweise ist die LED-Platine 4 in der Leuchte parallel zu der Ebene E orientiert angeordnet, insbesondere auf einer, der Ebene E' gegenüberliegenden Seite der Ebene E. Fig. 3 shows a perspective detailed sketch according to a variant. The reference symbols are used in a manner analogous to the above. As indicated in this drawing, the optical element preferably has latching elements for a latching connection V with the LED board 4 of the lamp. The LEDs 3, which are arranged in the recesses of the lens elements 1, are preferably LEDs 3 of this LED board 4. The LED board 4 is preferably arranged in the luminaire oriented parallel to the plane E, in particular on one, the plane E. 'opposite side of level E.

Wie wiederum aus der Schnittdarstellung der Fig. 2 hervorgeht, ist die Gestaltung dabei vorzugsweise derart, dass die LED-Platine 4 die Linsenelemente 1 kontaktiert, insbesondere an den Rändern der Ausnehmungen der Lichteintrittsseiten 15 kontaktiert. Auf diese Weise lässt sich erzielen, dass das optische Element, wenn es über die Rastverbindung V mit der LED-Platine 4 verbunden ist, ein besonders wirkungsvolles Berührungsschutz-Element für die LEDs 3 bildet.As again from the sectional view of Fig. 2 As can be seen, the design is preferably such that the LED board 4 makes contact with the lens elements 1, in particular makes contact with the edges of the recesses of the light entry sides 15. In this way it can be achieved that the optical element, when it is connected to the LED circuit board 4 via the latching connection V , forms a particularly effective contact protection element for the LEDs 3.

Insbesondere ist die Gestaltung so, dass das von den LEDs 3 der LED-Platine 4 abgegebene Licht in die Linsenelemente 1 eintritt, ohne zuvor von einem weiteren optischen Element beeinflusst zu werden.In particular, the design is such that the light emitted by the LEDs 3 of the LED circuit board 4 enters the lens elements 1 without being influenced beforehand by a further optical element.

Der zweite Teil 82 des optischen Elements, durch den der ringförmig umlaufende Seitenwandbereich gebildet ist, kann ebenfalls Rastelemente zur Verbindung mit wenigstens einem weiteren Bauteil der Leuchte aufweisen, insbesondere an einem, der Ebene E' abgewandten Kantenbereich des Seitenwandbereichs. Bei dem weiteren Bauteil der Leuchte kann es sich beispielsweise wiederum um die LED-Platine 4 handeln oder um ein Gehäuse der Leuchte. Vorzugsweise erstreckt sich der Seitenwandbereich von der Ebene E' bis zu der Ebene E, insbesondere derart, dass er die Ebene E in ringförmig geschlossener Weise durchsetzt.The second part 82 of the optical element, through which the annular circumferential side wall area is formed, can also have latching elements for connection to at least one further component of the luminaire, in particular on an edge area of the side wall area facing away from plane E '. The further component of the light can, for example, again be the LED circuit board 4 or a housing of the light. The side wall region preferably extends from plane E 'to plane E, in particular in such a way that it penetrates plane E in an annularly closed manner.

Das gezeigte optische Element lässt sich besonders kostengünstig herstellen; zudem lässt sich mit dem optischen Element ein besonders geeigneter Berührungsschutz für die Leuchte bilden. Dabei lässt sich mit einer Leuchte, die mit diesem optischen Element versehen ist, eine Lichtabgabe wie mit einer herkömmlichen Rasterleuchte erzielen.The optical element shown can be produced particularly inexpensively; In addition, the optical element can be used to form a particularly suitable protection against contact for the luminaire. With a lamp that is provided with this optical element, a light emission can be achieved as with a conventional louvre lamp.

Claims (8)

  1. Luminaire comprising
    - an optical element with at least a lens element (1) consisting of a first material, and a holding element (2) consisting of a second material, wherein the second material is different from the first material in its optical properties,
    wherein the at least one lens element (1) and the holding element (2) are so integrated in design that the optical element is in one piece,
    wherein the at least one lens element (1) comprises a light inlet side (15) and an opposing light outlet side (16),
    wherein the holding element (2) is a reflector element and the optical element is so designed that a light (L1) entering via the light inlet side (15) can exit the at least one lens element (1) via the light outlet side (16) and, in addition, is incident to the reflector element,
    wherein the optical element forms a cover of the luminaire,
    characterized in that
    at least one LED (3), which is so arranged that a light generated by the at least one LED (3) enters the at least one lens element (1), in particular without previous interaction with a further optical element,
    wherein the holding element (2) is formed through injection molding of the at least one lens element (1) and wherein the optical element is pot-shaped in form.
  2. Luminaire according to claim 1, further comprising
    - a circuit board (4), wherein the at least one LED (3) is disposed on the board (4), and the board (4) is connected to the optical element via a locking connection (V).
  3. Luminaire according to claim 1 or 2,
    wherein the first material and the second material are formed using the same base material, such as polycarbonate, or
    wherein the first material is formed using a first base material, such as polymethyl methacrylate, while the second material is formed using a different second base material, such as polycarbonate.
  4. Luminaire according to one of the preceding claims,
    which only consists of the at least one lens element (1) and the holding element (2).
  5. Luminaire according to one of the preceding claims,
    wherein the at least one lens element (1) is optically clear and/or the holding element (2) has a white surface.
  6. Luminaire according to one of the preceding claims,
    wherein the light inlet side (15) has a concave curvature to receive at least one LED (3).
  7. Luminaire according to one of the preceding claims,
    wherein the optical element is also so designed that a further light (L2) entering on the light inlet side (15) can leave the at least one lens element (1) on the light outlet side (16) without further impinging on the reflector element.
  8. Luminaire according to one of the preceding claims,
    wherein the holding element (2) has latching elements, in particular for a latching connection with an LED board (4) of the luminaire or a housing of the luminaire.
EP14191613.0A 2013-11-06 2014-11-04 Optical element for a lamp, and lamp Active EP2871411B2 (en)

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EP2871411B1 EP2871411B1 (en) 2016-08-31
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