EP3889499A1 - Luminaire pourvu de source lumineuse et système optique associé - Google Patents

Luminaire pourvu de source lumineuse et système optique associé Download PDF

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Publication number
EP3889499A1
EP3889499A1 EP21163905.9A EP21163905A EP3889499A1 EP 3889499 A1 EP3889499 A1 EP 3889499A1 EP 21163905 A EP21163905 A EP 21163905A EP 3889499 A1 EP3889499 A1 EP 3889499A1
Authority
EP
European Patent Office
Prior art keywords
light
optics
primary
light source
wall area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21163905.9A
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German (de)
English (en)
Inventor
Matthias COVI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP3889499A1 publication Critical patent/EP3889499A1/fr
Pending legal-status Critical Current

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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
    • 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
    • F21V13/12—Combinations of only three kinds of elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0083—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
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear 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 present invention relates to a lamp which has a light source and a reflector provided for influencing the light output.
  • the invention relates to a so-called downlight.
  • Under downlights are meant for ceiling mounting, usually compactly designed lights which have, for example, a round or angular opening for emitting light.
  • Such downlights emit their light downwards and thus create a light cone on the floor or on a wall below the luminaire, with downlights being offered with different light distribution. How wide the light distribution is depends on the design of the optical system of the luminaire.
  • the light output is generally influenced via a reflector assigned to the light source.
  • a reflector assigned to the light source the use of corresponding cup-like reflectors is known here, the shape of which is selected such that the light from the light source is reflected in a suitable manner and directed downwards.
  • the shape of the reflector pot there is then a corresponding distribution of the light output.
  • the reflector of the downlight In order to make the appearance of such lights more appealing, it is often known to design the reflector of the downlight, which is usually visible to an observer regardless of the type of installation, in a special way. It is known, for example, to design the reflector surface in certain colors or with certain surface properties such as facets, which give the reflector and thus the luminaire as a whole an attractive appearance, especially when the light source is activated. As a result, the luminaire is not only used to illuminate an area underneath, but also acts as a visually appealing object overall, which has a positive effect on the interior design.
  • the problem in this context is that the color and the surface properties of the reflector used to influence the light usually have a very marked effect on the shape of the light intensity distribution achieved by the lamp and the efficiency of the lamp.
  • the reflector visible to a viewer be designed in a special way, that is to say, for example, colored or in If it is specially designed to reflect light, then there is often the problem that the desired light distribution, which would be required for efficient lighting, can then no longer be achieved with this reflector.
  • the present invention is therefore based on the object of specifying a luminaire in which there is great flexibility with regard to the possibilities for designing the reflector visible to a viewer and nevertheless a light distribution suitable for lighting purposes can be achieved essentially independently of the design of this reflector.
  • the concept according to the invention is based on the idea of dividing the lighting system of the luminaire used to influence the light output essentially into two parts which, however, are then connected to one another again in a sandwich-like manner.
  • the light source of the lamp is assigned a primary optic in the form of a preferably mirrored reflector, which is responsible for creating the desired light intensity distribution curve of the lamp in the immediate vicinity of the light source.
  • a preferably weakly diffuse, that is to say light-scattering, layer then separates this primary optic from an additionally used secondary optic, via which the actual light output of the luminaire takes place.
  • These secondary optics also have a reflective surface which, however - in contrast to the primary optics - is visible to an observer and can be colored or provided with certain surface properties as desired.
  • This visible reflector part however, has almost no or only insignificant effect on the actual light output and is at most responsible for establishing a glare-free angle for looking directly into the luminaire.
  • the actual light intensity distribution is determined by the essentially invisible primary optics.
  • the solution according to the invention thus makes it possible to select the color and / or the surface properties of the visible part of the lamp within certain limits without significantly changing the desired characteristic shape of the light intensity distribution curve. This significantly increases the scope for designing the visible reflector area, while light can still be emitted in the desired manner in a high quality.
  • the light-scattering element is preferably designed in such a way that a direct view of the light source and of the primary optics is largely prevented. It can be a weakly scattering film or a pane.
  • the design of the components of the optical system is such that the primary optics produce a light distribution of the light emitted by the light source, which is at most slightly influenced by the scattering element and the subsequent secondary optics.
  • the wall area of the primary optics which is preferably designed as a reflector cup and is mainly responsible for the design of the light output of the lamp, is preferably mirrored, i.e. designed to be highly reflective, although a diffusely reflective design of this reflector area would in principle also be conceivable.
  • the wall area of the secondary optics is preferably designed in such a way that it gives the lamp an attractive appearance. It would therefore be conceivable, for example, to design this wall area with a colored coating and / or to provide it with certain surface properties in the form of facets, corrugations or other structures.
  • the secondary optics which are also preferably designed in the form of a pot, should, as already mentioned, significantly influence the appearance of the lamp from the point of view of an observer. Accordingly, it is preferably provided that the light emission opening of the luminaire formed by the wall area of the secondary optics is either opened or at most closed by a transparent element that does not influence the light output, so that an insight into this area of the Luminaire enables and thus the wall area of the secondary optics is visible to an observer.
  • the primary optics are preferably designed in the form of a pot-shaped reflector.
  • the circumferentially closed wall area is thus formed in a diverging manner starting from the light source, for example in the manner of the outer surface of a truncated pyramid or a truncated cone.
  • the curvature of the reflector surface can be selected in such a way that the desired light distribution for the luminaire is achieved.
  • a parabolic curvature should be considered, in which case the light source is positioned in the area of the focal point of the parabola in order to be able to achieve a strong focus of the light, as is required, for example, according to the relevant standards for the lighting of workplaces.
  • the light source is preferably formed by an LED light source which is arranged in a light entry area of the primary optics. It can be both a single LED and an LED cluster, which consists of several LEDs, which in this case can also be controlled separately from one another.
  • the luminaire can be implemented, for example, in the form of a compact downlight with a single light source.
  • several light sources one behind the other in a longitudinal direction, each of which is then assigned a primary lens.
  • secondary optics which are assigned to several primary optics. In the case of several secondary optics, these preferably form a one-piece component.
  • the luminaire according to the present invention also preferably has a housing, with the possibility then in particular of using the secondary optics as a supporting element for holding further luminaire components.
  • the secondary optics or the component forming a plurality of secondary optics forms a holder for the primary optics or primary optics in the housing.
  • a certain centering function is also exercised by the secondary optics, which ensures that both optics interact in the desired manner in order to achieve the above-mentioned desired effects.
  • the solution according to the invention provides a luminaire, in particular a downlight, which has great flexibility with regard to the design of the components visible to an observer, although it is ensured that light is emitted in the desired manner for high-quality lighting.
  • Figure 1 shows a section of a luminaire provided with the reference number 100, which is designed as a luminaire extending in an elongated direction and here has several light sources arranged one behind the other in this longitudinal direction L, only one of these light sources being shown in the present case.
  • the luminaire 100 has a housing 110 which is formed by an elongated profile body, for example in the form of a die-cast aluminum body or an extrusion profile.
  • the housing 110 is C-shaped in cross section with a transverse limb 111 and two laterally downwardly extending side walls 112, so that an elongated receiving space 115 is created in which the components responsible for light generation and emission are arranged. Furthermore, this space 115 can also be used to accommodate operating devices (not shown in greater detail) for controlling the lighting means.
  • the housing 110 can of course also be designed differently.
  • a common board 10 extending in the longitudinal direction are responsible for generating light.
  • individual circuit boards can also be used for the individual LED light sources.
  • each LED lighting means 15 consists of a group or a cluster consisting of two LEDs (here, too, any number of LEDs can be used for a cluster), which emit light in different colors or color temperatures.
  • the color location or the color temperature of the emitted light could then be adapted in the desired manner, whereby, of course, changing the overall brightness of the emitted light, i.e. dimming the lamp 100, would also be conceivable.
  • the core component of the luminaire 100 is the optical system 20, which is described in more detail below and which is responsible for the corresponding influencing and output of the light generated by the LED lighting means 15.
  • the light output is to be influenced in particular by using reflective surfaces, which are to achieve a desired light emission characteristic by correspondingly influencing the light beams, which is suitable, for example, for efficient lighting of workplaces or comparable applications.
  • the luminaire 100 has reflector surface areas that are visible to an observer and that are designed in a special way in order to give the luminaire 100 an attractive appearance. Since the design of these reflector surface areas is generally not compatible with the desired light emission properties of the luminaire 100, a special design of the optical system 20 is selected in the present case, which will be explained in more detail below.
  • the optical system 20 is designed in several parts and consists essentially of three components arranged one behind the other in the light emission direction.
  • the optical system 20 initially has primary optics 25, which are designed as a pot-like reflector in the immediate vicinity of the LED light source 15.
  • Such pot reflectors are already known and are used, for example, in compact radiators or the like.
  • the reflective wall areas 26 of the primary optics 25 are designed in such a way that, by corresponding reflection of the light beams emitted by the LED light source 15, they deflect them in such a way that a desired light intensity distribution curve is achieved.
  • Each LED light source 15 is assigned an individual reflector pot with a frame-like, circumferentially closed wall area 26 extending away from the light source 15 in the light emission direction, the wall areas 26 then being shaped in such a way that the light is influenced in the desired manner.
  • the reflective wall area 26 of the primary optics 25 can be designed to be rotationally symmetrical with regard to the light emission direction of the light source 15.
  • the side walls 28 of the pot reflectors running transversely to the longitudinal direction L have no curvature, but instead extend essentially linearly diverging towards the underside.
  • these side walls 28 cause the light to be glare-free in the longitudinal direction L of the luminaire 100 Main planes parallel and normal to the longitudinal direction L do not necessarily have to be the same.
  • the primary optics 25 are followed by secondary optics 30, which in the present case in turn consist of a plurality of reflector pots (in the present case only a single pot is shown in the figures).
  • the secondary optics 30 are designed in such a way that the light entry area of the pot reflector essentially corresponds to the light emission opening of the pot reflector of the primary optics 25.
  • reflective wall areas 32 which are closed in a frame-like manner and which delimit a, in the present case, square light exit opening 35, extend at their lower end.
  • a different shape can of course also be provided for the wall areas 32 and, for example, a circular or oval light exit opening 35.
  • the wall areas 32 of the secondary optics 30 should be recognizable to an observer, but not the light source 15 or the primary optics 25.
  • Primary optics 25 and secondary optics 30 are therefore provided with an in the area of the light exit opening of the Primary optics 25 arranged scattering element 40 separated from one another, it being possible here for a scattering disk or a scattering film.
  • the effect of this scattering element 40 should, however, be relatively small and primarily serve to avoid a direct view of the primary optics 25 and thus of the lighting means 15. In particular, however, the scattering effect of this scattering element 40 should only insignificantly or ideally not influence the light intensity distribution caused by the primary optics 25.
  • the actual light emission characteristic of the luminaire 100 is primarily determined by the primary optics 25 and the diffuser 40 and the secondary optics 30 no longer or only insignificantly influence the final light output.
  • the pot-like configuration of the secondary optics 30 then serves at most to define an anti-glare angle for laterally emitted light beams, that is to say to block excessively laterally emitted light beams.
  • the distribution of the light over an area illuminated by the luminaire 100 is primarily determined by the primary optics 20.
  • the surface area 32 of the secondary optics 30 can be designed, for example, in color and / or with a desired structure in the form of facets, corrugations or the like is provided. Measures of this kind lead to the fact that the luminaire 100 as a whole appears in a special way to an observer, but the light output itself is not or only insignificantly influenced by this. With regard to the design of the lamp 100, there are accordingly a wide variety of possibilities, although it is ensured, despite everything, that high-quality lighting of areas located below the lamp 100 can be achieved.
  • the wall area 32 of the secondary optics 30 also has at least weakly reflective properties.
  • each primary optics 25 in the form of a reflector pot is assigned an individual reflector pot as secondary optics 30.
  • a common secondary optic 30 for the light output of the luminaire 100 in the case of a plurality of primary optics 25 arranged one behind the other.
  • a number of primary optics 25 corresponding to the number of LED illuminants 15 is provided one behind the other in the longitudinal direction, but only a single secondary optic extending over the entire length of the luminaire 100 30 is used, which forms a single light emission opening for the luminaire 100.
  • the light emission characteristics of the luminaire 100 are essentially determined by the properties of the primary optics 25. In principle, it is also not absolutely necessary that all primary optics are designed identically. These could also be designed in different ways, if this is necessary or advantageous to achieve a desired light emission characteristic. It should also be pointed out again that the luminaire 100 according to the present invention can also have just a single LED light source with an associated optical system 20.
  • the secondary optics 30 can also hold the other ones for generating and emitting light responsible components.
  • the secondary optics 30 can also be used to hold the scattering element 40 and the primary optics 25, whereby a centering function can be achieved at the same time, which ensures that the components of the optical system 20 responsible for influencing the light are correctly positioned relative to one another will.
  • a solution is made available by which it is ensured that a light output can be achieved in the desired manner with a lamp, in particular with a downlight, and still there are possibilities to change the appearance of the lamp by a special design of for an observer to change visible optical components of the luminaire.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP21163905.9A 2020-03-30 2021-03-22 Luminaire pourvu de source lumineuse et système optique associé Pending EP3889499A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202020101683.0U DE202020101683U1 (de) 2020-03-30 2020-03-30 Leuchte mit Lichtquelle und zugehöriger Optik

Publications (1)

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EP3889499A1 true EP3889499A1 (fr) 2021-10-06

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EP21163905.9A Pending EP3889499A1 (fr) 2020-03-30 2021-03-22 Luminaire pourvu de source lumineuse et système optique associé

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EP (1) EP3889499A1 (fr)
DE (1) DE202020101683U1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2312201A2 (fr) * 2009-10-13 2011-04-20 ERCO GmbH Luminaire pour illumination d'une surface d'un édifice
US20130163254A1 (en) * 2011-12-27 2013-06-27 Cordelia Lighting, Inc. Recessed led lighting fixture
CN205014197U (zh) * 2015-08-14 2016-02-03 广东德豪雷士照明有限公司 Led筒灯
WO2016108279A1 (fr) * 2014-12-28 2016-07-07 株式会社モデュレックス Appareil d'éclairage
DE102016201347A1 (de) * 2016-01-29 2017-08-03 Zumtobel Lighting Gmbh Optisches System zum Beeinflussen der Lichtabgabe einer Lichtquelle
US20180320845A1 (en) * 2017-05-02 2018-11-08 Abl Ip Holding Llc Retainer ring and associated methods for quiet-ceiling light fixtures

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016002197U1 (de) 2016-04-01 2016-06-06 Osram Gmbh Direktstrahlende LED-Leuchte mit Entblendungsoptik

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2312201A2 (fr) * 2009-10-13 2011-04-20 ERCO GmbH Luminaire pour illumination d'une surface d'un édifice
US20130163254A1 (en) * 2011-12-27 2013-06-27 Cordelia Lighting, Inc. Recessed led lighting fixture
WO2016108279A1 (fr) * 2014-12-28 2016-07-07 株式会社モデュレックス Appareil d'éclairage
CN205014197U (zh) * 2015-08-14 2016-02-03 广东德豪雷士照明有限公司 Led筒灯
DE102016201347A1 (de) * 2016-01-29 2017-08-03 Zumtobel Lighting Gmbh Optisches System zum Beeinflussen der Lichtabgabe einer Lichtquelle
US20180320845A1 (en) * 2017-05-02 2018-11-08 Abl Ip Holding Llc Retainer ring and associated methods for quiet-ceiling light fixtures

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Publication number Publication date
DE202020101683U1 (de) 2021-07-01

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