EP3540299A1 - Luminaire - Google Patents

Luminaire Download PDF

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Publication number
EP3540299A1
EP3540299A1 EP19162087.1A EP19162087A EP3540299A1 EP 3540299 A1 EP3540299 A1 EP 3540299A1 EP 19162087 A EP19162087 A EP 19162087A EP 3540299 A1 EP3540299 A1 EP 3540299A1
Authority
EP
European Patent Office
Prior art keywords
reflector
lens
recess
light
luminaire according
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.)
Granted
Application number
EP19162087.1A
Other languages
German (de)
English (en)
Other versions
EP3540299B1 (fr
Inventor
Andreas Richner
Viktor Stecher
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.)
Ribag Licht AG
Original Assignee
Ribag Licht AG
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 Ribag Licht AG filed Critical Ribag Licht AG
Publication of EP3540299A1 publication Critical patent/EP3540299A1/fr
Application granted granted Critical
Publication of EP3540299B1 publication Critical patent/EP3540299B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • 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
    • 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
    • F21V5/008—Combination of two or more successive refractors along an optical axis
    • 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 luminaire having a light source, a primary lens for capturing the light of the light source and radiating a light cone having a main emission direction, and an annular reflector having a central recess which deflects an outer portion of the light cone transversely to the main emission direction and an inner portion of the light source Light cone passes through the recess.
  • a certain area of space can be highlighted and, on the other hand, a uniform illumination of the entire space can be achieved.
  • the light bundle passing through the non-reflective recess of the reflector surface illuminates a certain spatial region, wherein said light beam can radiate from top to bottom, for example in the manner of a downlight, and can irradiate a bottom region.
  • this may be a relatively large surface area, which is uniformly illuminated by the light beam, or a relatively small, narrow area, the light in the latter case sets a light accent and an object such as a showcase or a table or highlights a similar area of space in a spotty way.
  • the light cone part captured by the reflector widens into the space transversely to the main emission direction of the light cone Thrown and in particular a ceiling or a wall on which the lamp is mounted, brighten.
  • a portion of the cone of light of the primary lens which widens at an angle to the main emission direction, is dimmed by the reflector, whereby glare can be avoided if a person looks obliquely into the lamp, for example obliquely from below onto the lamp mounted on the ceiling.
  • such lights can be mounted as a combined downlights and ceiling lights on a ceiling, in particular as a surface-mounted light that can be mounted on the underside of the ceiling, or possibly as a distance from the ceiling pendant light.
  • the luminaire can also be mounted on an upright wall, for example to accentuate a picture hung on an opposite wall and at the same time lighten the wall on which the luminaire is mounted.
  • a problem with such lights is that in a room often a grid or a series of such lights are installed, which should have a uniform, identical as possible appearance, but often have to fulfill different lighting tasks with different light distribution characteristics. If such luminaires are fastened to the ceiling, for example, in a fixed, uniform grid, while differently sized and / or unevenly distributed showcases are to be illuminated on the ground, the luminaires, in particular the light cone section emitted by the recess in the reflector, must illuminate different surface areas.
  • these luminaires with a primary lens and a reflector tend to foul and thus reduce efficiency and brilliance. Dust and dirt entering via the recess in the reflector or laterally beyond the emission area of the reflector can deposit on both the reflector surface and the lens.
  • the present invention is therefore based on the object to provide an improved luminaire of the type mentioned, which avoids the disadvantages of the prior art and the latter develops in an advantageous manner.
  • the luminaire is to be improved with regard to the variability of its emission characteristic and a permanently efficient, brilliant photometric radiation is achieved.
  • the object is achieved by a luminaire according to claim 1.
  • Preferred embodiments of the invention are the subject of the dependent claims.
  • a secondary lens is inserted into said recess of the reflector and designed to widen, narrow and / or reshape the unreflected, inner part of the light cone of the primary lens.
  • Said reflector is arranged at a distance from the primary lens and held by a sleeve-shaped, transparent housing part, which surrounds the reflector and the primary lens, so that the light deflected by the reflector transversely to the main emission direction passes through said transparent housing part.
  • the primary lens thereby forms the entire light of the light source into an acute-angled emission cone, which can expand at an acute angle, in particular in the main emission, so that a flared edge of the Abstrahlkegels falls on the axially spaced reflector and is deflected by this transversely, while the central part of the expanded Abstrahlkegels passes through the secondary lens.
  • the above-mentioned primary lens does not mean the lens-type light source component which is sometimes provided directly on the light source itself and which, for example in the case of LEDs, is bell-like on the light source Semiconductor element is seated, but a downstream of the light source is a separate component which, although connected to the light source, for example, can sit on the circuit board, but is subordinated so to speak later of the already finished light source.
  • the lamp with such an (additional) primary lens in itself already, ie even without the said reflector act as a lamp and achieve a Abstrahlkegel or an asymmetric Abstrahlkeule with a desired light distribution characteristic when said reflector is degraded together with the secondary lens ,
  • a set of several secondary lenses can be provided which comprise at least one converging lens and at least one scattering lens and have corresponding external connection dimensions and / or contours in order to be interchangeable inserted into the recess can, depending on the desired Abstrahl characterizing of the reflector passing through the recess passing light cone part, another of said exchangeable lenses can be used.
  • the luminaire forms a simple and variably adaptable luminaire module with a modular design, which nevertheless has a uniform external appearance, regardless of different emission characteristics.
  • the widening of the light beam emitted by the secondary lens can be adapted to the respective lighting task and, in particular, to different ceiling heights.
  • a scattering lens can be used, while for irradiation of the same floor area given a larger ceiling height, a secondary lens with less expansion can be used.
  • a secondary lens with less expansion can be used.
  • the ceiling height can also be different with different secondary lenses and different widening angles different room areas are illuminated, for example, a larger floor area evenly irradiated or a smaller object like a showcase are accentuated more.
  • said secondary lens does not necessarily have to be bulging or narrowing.
  • the set of secondary lenses includes a Umlenklinse, by means of which the main emission can be changed so that the light beam when passing through the reflector recess and the secondary lens provided there, so to speak slightly kinks and / or undergoes a cross-sectional deformation, for example a circular cross-section to an elliptical or polygonal cross-section.
  • the secondary lens can be designed to produce an asymmetrical light distribution in order, for example, to illuminate one subarea more strongly and one subarea lighter in a generally illuminated spatial area.
  • a shaping lens it is also not possible to illuminate spatial regions which are not positioned directly in the main emission direction of the primary lens, or, for example, rectangular carpets can be approximately completely illuminated.
  • a shading or cover in the reflector recess instead of such a lens in order to completely shade or greatly reduce the light beam emerging there.
  • Such complete shadowing of the main emission direction can be useful, for example, if the luminaire is to be mounted on an upright wall and / or in an installation situation in which essentially only the brightening of the wall and / or ceiling surface surrounding the luminaire is desired.
  • Such a cover which correspond in terms of their connection dimensions and / or contours ago the aforementioned secondary lenses and can be used in an analogous manner in the reflector recess, on its primary lens side facing advantageously reflective and / or scattering emitting, for example, formed white on the surface be to keep the efficiency of the lamp up and not through the reflector recess emit light emerging laterally past the reflector.
  • a cap on its side facing the primary lens but also at least partially be provided with a faceting, for example, reflector facets to laterally deflect the light transversely to the main emission.
  • said different secondary lenses and / or the cap are advantageously used from a front side in exchange for each other in the recess of the reflector.
  • the front side means that side of the luminaire to which the light component passing through the secondary lens or the recess in the reflector is radiated.
  • the secondary lenses of different emission characteristics and / or said cover cap and the recess of the reflector can be contoured at the edge such that the secondary lenses and / or the cover cap can be inserted from the front into the recess of the reflector in the direction of the main emission direction.
  • the recess may conically expand or taper in a stepped manner towards the front side, while the secondary lenses and / or the cover cap may taper towards the primary lens, for example conical or stepped in order to fit snugly into the recess.
  • the respective secondary lens - or possibly the said cover - be attached directly to the reflector and substantially completely close the recess of the reflector, being provided at the edge of the secondary lens and at the edge of the recess compatible, releasable connection means can.
  • releasable connection means may advantageously comprise a positive snap connection, by means of which the secondary lens in the reflector recess is 29nappbar.
  • other positive connection means may be provided, for example, a collar of the recess overlapping or embracing on the Secondary lens with which the secondary lens can rest on the recess edge of the reflector.
  • the recess in the reflector may include such a collar, so that the lens can be inserted into the recess and can be present against the collar.
  • said secondary lens need not be detachably or interchangeably attached to the reflector, but may also be permanently attached thereto, for example by gluing, in which case the selection of the desired secondary lens takes place on the manufacturer side during the production process.
  • the lens may also be integrally formed integrally with the reflector, for example by injection molding of reflector and secondary lens in one piece of plastic.
  • the recess of the reflector explained in the context is to be understood as a non-reflective recess in the reflection surface which does not reflect light but lets it through, but nevertheless does not have to be a material-free through hole.
  • the luminaire may have a luminaire housing which surrounds the primary lens and the reflector surface of the reflector and protects against dusting or contamination.
  • a sleeve-shaped, transparent housing part can be provided which connects the reflector to a luminaire base support to which the light source and / or the primary lens are fastened, so that said housing part together with the reflector and the secondary lens forms a luminaire housing which forms the primary lens encloses.
  • Said transparent housing part may, for example, be injection-molded from transparent plastic and / or comprise a glass.
  • the said transparent housing part is closed and / or dust-tight connected to the reflector and the lamp base support member to form a closed lamp interior, in which the primary lens, the back of the secondary lens and the reflector surface of the reflector are accommodated protected.
  • said sleeve-shaped, transparent housing part can hold and / or be connected to an outer edge of the reflector in order to hold the reflector and to connect said outer edge of the reflector to the luminaire base support, in particular an outer edge thereof.
  • the housing part can be releasably connected to the reflector and / or the base support member to operate the lamp without reflector and without secondary lens only with the primary lens can.
  • Said sleeve-shaped transparent housing part can advantageously form a circumferential wall which is considered to be straight, in particular at least approximately cylindrical or conical in shape.
  • the housing part may also be contoured at least in sections bulging or curved, i. the peripheral wall viewed in cross-section may be contoured concave or convex or else alternately concave and convexly curved.
  • the said housing part may be facet-free and / or provided with a smooth surface, in order not to deflect the reflected light passing through the housing part further light.
  • the aforementioned secondary lens which can be inserted into the reflector recess, can be formed in a development of the invention, at least approximately plate-shaped, which may be provided depending on the training as a collection or scattering lens, a concave or convex surface curvature.
  • a total of compact, flat design of the lamp can be achieved, which ensures an attractive appearance even when mounted as surface-mounted or surface-mounted.
  • the secondary lens may advantageously be provided with a faceting, wherein such faceting may comprise more than 25 or more than 50 or even more than 100 facets, which in a regular arrangement pattern be positioned or distributed over the lens surface.
  • a faceting of the secondary lens a particularly homogeneous radiation of the light beam can be achieved and possibly also a color mixing can be achieved, especially when several different colored point light sources such as LEDs are used as the light source.
  • the said reflector may be provided with a faceting, which may also comprise more than 25 or more than 50 or even more than 100 facets, which may be distributed over the reflector surface in a regular pattern.
  • a faceting of the reflector and the cross-radiation can be homogenized and the ceiling or wall surface are uniformly illuminated.
  • the reflector may advantageously be configured to capture the captured light of the light cone of the primary lens transversely to its main emission direction into an annular wedge region of 85 ° to 120 ° or 90 ° to 115 ° or in particular also 95 ° to 110 ° to said main emission direction of the light cone of the primary lens radiate.
  • the reflector can thus advantageously return the captured light at least partially against the main emission direction in order to grind a plane lying behind or above the luminaire, i. lighten at an acute angle.
  • the aforementioned transverse radiation in a ring wedge with a relatively narrow expansion angle of 85 ° to 120 ° or 95 ° to 110 ° or possibly also narrower from 95 ° to 105 ° can achieve a wide, uniform brightening of the room.
  • a space region can be dimmed by the secondary lens and the reflector, which can be contoured annular and between the light beam, which is emitted from the secondary lens, and the light beam, which is emitted by the reflector, can lie.
  • This dimmed area can for example be an angle range of 60 ° to 85 ° to the main emission direction or 50 ° to 90 ° or 40 ° to 90 ° or even 30 ° to 90 °.
  • the lamp 1 comprises a light source 2, which radiates in a half-space, for example in the form of an approximately point-shaped LED or a COB unit, ie chip on board lamps, where appropriate, a multi-colored LED grid can be provided.
  • a light source 2 which radiates in a half-space, for example in the form of an approximately point-shaped LED or a COB unit, ie chip on board lamps, where appropriate, a multi-colored LED grid can be provided.
  • Said light source 2 is attached to a lamp base 10, by means of which the lamp 1 can be mounted on a ceiling or on a wall.
  • Said lamp base 10 may form a plate-shaped component which may have an approximately flat mounting surface 10 for surface mounting. It is understood, however, that other mounting options, such as a rail mounting or a suspended mounting are possible.
  • a primary lens 3 is connected, which may be attached to said lamp base 10, said lamp base 10 may include, for example, a cup-shaped recess preferably with white walls surrounding the light source 2 and on the edges of said primary lens 3 sits.
  • the said primary lens 3 may have a light source 2 facing, substantially flat light entrance surface and on the other hand have a dome-shaped curved light exit surface 11, wherein the primary lens 3 viewed in total can be rotationally symmetrical and - roughly speaking - may have a mirror-shaped contouring.
  • the light emitted by the light source 2 is introduced essentially completely into the primary lens 3 and emitted by said primary lens 3 in the form of a light beam or light cone 4, which has a main emission direction 5 which essentially form the axis of symmetry of the primary lens 3 and / or can coincide with an axis of symmetry of the light source 2.
  • the light beam may be circular or even oval, elliptical or polygonal contoured.
  • Said light cone 4 advantageously exhibits a widening in the range from 2 ⁇ 20 ° to 2 ⁇ 70 ° or 2 ⁇ 30 ° to 2 ⁇ 60 °, but in principle may also have other widenings.
  • the lamp 1 could be like in Fig. 1 be used shown, in particular as a downlight, in which case the light cone 4 would form the whole radiation of the lamp 1.
  • a reflector 6 can be connected, which is positioned in the light cone 4 of the primary lens 3 and whose outer edge captures the outer region, the reflector 6 axially and / or radially spaced from the primary lens 3 sits.
  • Said reflector 6 comprises a central recess 7, for example in the form of a circular through-hole, but possibly also in the form of a rectangular or polygon-like through-hole.
  • the inside diameter of said recess 7 can be of the order of magnitude of approximately-depending on the design of the widening of the light cone 4 - 50% to 125% or 60% to 100% of Diameter of the primary lens 3 amount, so that the reflector 6 captures only the outer ring portion of the light cone 4.
  • said reflector 6 may be formed to form a wedge-shaped annular portion 12 of about 85 ° to 120 ° or 95 ° 110 ° to the main emission direction 5 to be irradiated.
  • the emission area of the reflector 6 illuminates at an acute angle the ceiling or wall to which the luminaire 1 is mounted and illuminates it broadly.
  • the said reflector 6 may have an annular contour which, viewed in cross-section, extends at an acute angle to the main emission direction 5 of the primary lens 3 and may obliquely drop outwardly from the inner edge surrounding the recess 7, when the luminaire 1 is in the position shown in FIG Fig. 2 shown position.
  • Said reflector 6 may be attached to the lamp base 10 via a transparent, substantially sleeve-shaped housing part 9, which may for example be injection molded from transparent plastic or made of glass.
  • Said housing part 9 may in particular form a cylindrical or slightly conical sleeve with a straight course of the wall viewed in cross-section and be fastened on the one hand to an edge of the lamp base 10 and on the other hand to an outer edge of the reflector 6, for example by a positive connection such as a latching connection or a Screw, or kraft- and / or material fit by gluing or in other ways.
  • the housing part 9 closes dust-tight to the lamp base 10 and the reflector 6, so that entry of dust or dirt in the lamp interior 14 is prevented from the side.
  • a secondary lens 8 is used, which advantageously the can close entire recess 7.
  • a luminaire housing is formed by said secondary lens 8, the reflector 6 and the transparent housing part 9 together, which surrounds the primary lens 3 and reliably prevents the entry of dirt and dust into the interior of the lamp.
  • dust and dirt are kept away from the surface of the primary lens 3, the reflector surface of the reflector 6 and the light entrance surface of the secondary lens 8, so that a permanently efficient light emission can be achieved.
  • said secondary lens 8 can be releasably secured to the reflector 6 by releasable connection means, wherein, for example, a positive connection of the secondary lens 8 with the reflector 6 can be provided, for example in the form of a snap connection.
  • the secondary lens 8 can also have a collar, for example, which covers the edge of the recess 7, so that the secondary lens 8 can be placed from above into the reflector without slipping through.
  • Other connection means are also possible.
  • Said secondary lens 8 captures the part of the light beam or cone 4 passing through the recess 7 of the primary lens 3 and shapes it in the desired manner.
  • the said secondary lens 8 can function as a widening diffusing lens, which further widens the radiation angle of the captured part of the light cone 4, for example to illuminate a larger object under the lamp 1, such as a carpet or the like, cf. Fig. 3 .
  • a constricting converging lens can also be provided as the secondary lens 8, which narrows or further narrows the emission angle of the captured light cone part in order to brilliantly illuminate an object, such as a showcase, located under the luminaire 1, cf. Fig. 5 ,
  • the secondary lens 8 may also have an average radiation characteristic, which neither expands nor narrows the captured part of the light cone 4 or only slightly expands or narrows.
  • the releasably attached to the reflector 6 secondary lenses 8 according to the Figures 3-5 advantageously form a set of interchangeable lenses, from which either a suitable for the lighting task lens can be selected and inserted into the reflector 6.
  • all copies of the exchangeable lens set have corresponding connection dimensions and connection contours, so that they can be alternately inserted into the same recess of the reflector 6.
  • an opaque insert cover or insert ring can be inserted into the recess 7, which for example in a Wall mounting may be helpful, in which the main emission direction 5 is oriented horizontally.
  • Fig. 6 shows, is emitted by the reflector 6 and the secondary lens 8 of the primary lens 3 radiated light cone 4 on the one hand in a ceiling or wall-flooding radiating 12 and on the other hand in a cone or Bundled beam emitting region 15, wherein the latter radiation region 15 may be circular in cross-section, but also oval or elliptical or polygonal contoured.
  • Said radiation range 15 can be changed by the choice of the secondary lens 8 and, for example, have an expansion angle of 2 x 0 ° to 2 x 60 ° or 2 x 10 ° to 2 x 50 ° or 2 x 20 ° to 2 x 40 °, depending according to which lighting task is to be fulfilled.
  • the reflector 6 and the secondary lens 8 hide an annular wedge region 13 which advantageously extends in a range of at least 60 ° to 80 ° or 50 ° to 85 ° or 45 ° to 90 ° to the main emission direction 5 can prevent glare from obliquely looking into the light 1 people.
  • the reflector 6 may be provided on its reflector surface with a faceting, which may for example comprise several hundred facets.
  • facets may be arranged in three or more than five or even more than ten rings around the recess 7, each with more than 10 facets per ring.
  • essentially the entire photometrically active reflector surface can be faceted.
  • the secondary lens 8 may advantageously substantially - roughly speaking - be plate-shaped or disc-shaped to achieve a total compact, flat design of the lamp 1, the surfaces of the plate-shaped or disc-shaped secondary lens 8 depending on the training as a converging lens or scattering lens may be concave and / or convex.
  • the secondary lens 8 may be provided on its light entry surface and / or on its light exit surface with a faceting, with a plurality of, for example, more than 100 facets may be provided.
  • a plurality of, for example, more than 100 facets may be provided.
  • multiple rings of facets for example, more than three or more than five or more than ten rings be provided by facets each with more than five or more than ten facets per ring.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP19162087.1A 2018-03-15 2019-03-12 Luminaire Active EP3540299B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018106056.4A DE102018106056A1 (de) 2018-03-15 2018-03-15 Leuchte

Publications (2)

Publication Number Publication Date
EP3540299A1 true EP3540299A1 (fr) 2019-09-18
EP3540299B1 EP3540299B1 (fr) 2020-12-30

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EP19162087.1A Active EP3540299B1 (fr) 2018-03-15 2019-03-12 Luminaire

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EP (1) EP3540299B1 (fr)
DE (1) DE102018106056A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003258319A (ja) * 2002-02-28 2003-09-12 Toyoda Gosei Co Ltd 発光ダイオード及び灯具
EP2884155A1 (fr) * 2013-12-16 2015-06-17 Glashütte Limburg Leuchten GmbH + Co. KG Éclairage avec guide de lumière

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130100677A1 (en) * 2011-10-20 2013-04-25 Raytheon Company Lighting structure
DE202012009801U1 (de) * 2012-10-15 2012-12-18 Lts Licht & Leuchten Gmbh Leuchte und Leuchtvorrichtung für eine Leuchte
CN204387867U (zh) * 2015-01-27 2015-06-10 福建省宝能达光电科技有限公司 可大角度照射的天花灯

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003258319A (ja) * 2002-02-28 2003-09-12 Toyoda Gosei Co Ltd 発光ダイオード及び灯具
EP2884155A1 (fr) * 2013-12-16 2015-06-17 Glashütte Limburg Leuchten GmbH + Co. KG Éclairage avec guide de lumière

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EP3540299B1 (fr) 2020-12-30
DE102018106056A1 (de) 2019-09-19

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