EP3408584B1 - Appareil d'éclairage muni d'un élément de recouvrement pyramidal ou conique - Google Patents

Appareil d'éclairage muni d'un élément de recouvrement pyramidal ou conique Download PDF

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Publication number
EP3408584B1
EP3408584B1 EP17703055.8A EP17703055A EP3408584B1 EP 3408584 B1 EP3408584 B1 EP 3408584B1 EP 17703055 A EP17703055 A EP 17703055A EP 3408584 B1 EP3408584 B1 EP 3408584B1
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EP
European Patent Office
Prior art keywords
light
reflector
cover
luminaire according
leds
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.)
Active
Application number
EP17703055.8A
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German (de)
English (en)
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EP3408584A1 (fr
Inventor
Tobias Schmidt
Alexander Faller
Stephan Lukanow
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.)
Siteco GmbH
Original Assignee
Siteco GmbH
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Priority to RS20220394A priority Critical patent/RS63153B1/sr
Publication of EP3408584A1 publication Critical patent/EP3408584A1/fr
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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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/049—Patterns or structured surfaces for diffusing light, e.g. frosted surfaces
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the 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
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F21V5/004—Refractors for light sources using microoptical elements for redirecting or diffusing light using microlenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/30—Lighting for domestic or personal use
    • F21W2131/301—Lighting for domestic or personal use for furniture
    • 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
    • F21Y2105/12—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
    • 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
    • F21Y2105/14—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array
    • F21Y2105/16—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array square or rectangular, e.g. for light panels
    • 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
    • F21Y2105/14—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array
    • F21Y2105/18—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
    • 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • 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]
    • 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]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Definitions

  • the present invention relates to a lamp with a light source made up of at least one LED, a reflector and a transparent cover.
  • Luminaires which contain LEDs (which also include OLEDs) as light sources easily tend to dazzle a viewer because the light sources are almost point-like. Furthermore, depending on where the light is used, e.g. as an office light, a light distribution is desired that is weak enough at high beam angles compared to the normal perpendicular to the light exit surface to prevent glare.
  • Such light distributions for glare-free lights in the interior are achieved, for example, by special covering of the lights to reduce glare.
  • Such covers may contain microstructures or textures that cause some light scattering.
  • the covers are also available as relatively thin foils.
  • U.S. 2015/029717 A1 discloses various forms of optical diffusers for producing a batwing light distribution that include a microstructure. According to one embodiment it is provided that the cover extends from the edge of a reflector in the direction of the light source.
  • US 5,309,544A discloses a lamp having a light pipe.
  • the light guide comprises a tube with a textured outer surface and smooth inner surfaces.
  • a reflective light extractor is positioned in the tube such that the light extracted by the extractor impinges the tube on a first side.
  • the first side of the extractor is indented lengthwise towards the interior of the light guide.
  • the object of the present invention is to further develop a generic luminaire in order to provide a glare-free, soft light distribution with a sufficient half-width for use as a recessed or surface-mounted ceiling luminaire or suspended ceiling luminaire, e.g. for office lighting.
  • a special feature of the lamp is that the flat, translucent cover extends inwards into the reflector, i.e. in the direction of the light source, in relation to the plane of the light exit opening, preferably with a point.
  • the light influenced by the microstructures in the cover is not emitted in the plane of the light exit opening, but is instead deflected in the direction of the central axis of the lamp. In this way, an effect similar to that of the slats of a conventional lamp can be achieved.
  • the light distribution at high beam angles, e.g. at angles above 85°, 80° or 65°, is reduced in order to improve the glare reduction of the luminaire.
  • the shape of the light-directing cover is defined by the side wall of a pyramid or cone, with the base of the pyramid or cone lying in the imaginary plane defined by the edge of the reflector.
  • the pyramid or cone shape has the advantage that the angle of inclination of the cover relative to the notional plane, which can be arranged parallel to the ceiling, is always constant.
  • an angle formed in a cross-section perpendicular to the notional plane between the surface of the light-transmitting cover and the notional plane is less than 30°, preferably less than 20° or 15°.
  • This flat angle is sufficient to achieve the effect that the light output is reduced or shielded in solid angle ranges above, for example, 85°, in particular 80° or 65°.
  • the flat angle of inclination prevents light from being deflected to the opposite side of the lamp to a significant extent to such an extent that it is emitted on the side opposite the central axis into a solid angle range above a desired shielding angle.
  • the shape of the cover in combination with the microstructure elements ensures that the light is scattered by the microstructures on the one hand to prevent reflected glare and on the other hand that excessive beam angles are avoided to prevent direct glare from shielding.
  • the height of the translucent covers, with which they protrude from the imaginary plane into the reflector is limited to 1/5 or preferably 1/8 of the largest diameter in the imaginary plane. This height-to-width ratio of the cover ensures that, as explained above, the emission of light is prevented or at least reduced above a critical angle in relation to the normal of the luminaire.
  • the microstructures include textures on a surface of the cover that faces the light source and/or that faces away from the light source.
  • the textures can comprise lens-shaped or prism-shaped elevations and/or depressions.
  • the elevations and/or depressions can be arranged regularly or irregularly.
  • the shape of the textures should contribute to the light being scattered or expanded locally on the cover. The inclination of the cover relative to the light exit opening then improves the preferred shielding for glare control.
  • the microstructures can also be formed by scattering particles in the material of the cover and/or on a surface of the cover.
  • the scattering particles have a similar function to the surface textures, ie they produce local light scattering. Textures or stray particles on the inside of the cover have the advantage that they are not damaged when the cover is cleaned. On the other hand, textures and scattering particles on the outside have the advantage that no reflections are visible on the otherwise flat surface when looking at the cover.
  • an additional reflector is provided, which adjoins the peripheral edge on the side of the cover facing away from the light source.
  • the additional reflector can serve as a cut-off reflector that improves the shielding of the light distribution.
  • the reflector and the additional reflector can also be connected to each other in one piece, in which case the peripheral edge of the reflector, as previously mentioned, is formed by the edge against which the transparent cover abuts the composite reflector.
  • the reflector and/or the additional reflector can have a high-gloss finish. This embodiment achieves a high lamp efficiency.
  • the reflector and/or the additional reflector can preferably also be designed to be diffusely reflective, in particular matt white. These embodiments further reduce the risk of possible glare.
  • the light source may comprise an array of LEDs arranged in a plane at the bottom of the reflector.
  • the distribution of the light is already more favorable at the location of the light source, ie better distributed.
  • different light colors of the LEDs can be mixed by the several LEDs. It is also possible for the LEDs to be arranged in groups together, with each point in the array preferably having one when using multicolored LEDs Includes group of LEDs with each color. This allows different colors to be mixed. If necessary, the differently colored LEDs can also be controlled separately from one another in order to change the light color of the lamp.
  • the LEDs or groups of LEDs are evenly distributed over the bottom of the reflector.
  • the LEDs are arranged along a peripheral edge of the bottom of the reflector.
  • the latter has the advantage that the portion of the light reflected by the reflectors arranged on the side is increased compared to a planar arrangement of the LEDs on the ground. This can also contribute to the glare reduction of the lamp.
  • the even distribution of the LEDs on the floor has the advantage that the surface of the translucent cover is illuminated more evenly, so that when viewed from the outside, the light outlet openings of the luminaire appear evenly bright.
  • the smallest distance of each LED or each LED group to the nearest neighbor is greater than 10 mm.
  • a primary lens is associated with each LED, for example to expand or focus the light of each LED towards the cover.
  • Combinations of different primary lenses are also possible.
  • the primary lenses in an outer ring and/or one or more primary lenses in the center of the LED array have a different radius of curvature than the primary lenses of the remaining LEDs in the array. This allows different light effects to be created in the area in which the light from the LEDs is primarily reflected on the side reflector walls, and the light that primarily strikes the top of the inward-facing cover of the lamp directly.
  • At least some primary lenses are flattened at their apex. This causes a combination of focusing in the edge area of the LED and defocusing in the central area of the LED.
  • the flattening of the crests can also be different depending on the position of the primary lens in the LED array.
  • the flats of the lenses in concentric rings of the LED array may each increase or decrease in a graduated manner to cause the light from each LED in the array to produce approximately the same light distribution after penetrating the light transmissive cover.
  • the differently flattened crests can also be combined with the different radii of curvature, as previously described.
  • the LEDs have different colors.
  • the combination of cold and warm light sources is therefore ideal for illuminating an interior space, such as an office. It is also possible to control the light sources of different colors separately, so that the mixed color of the luminaire can be selected by dimming the light sources differently.
  • the lamp has a base plate 2, which can be formed in particular by a PCB (Printed Circuit Board).
  • a base plate which is flat, is an arrangement provided by several LEDs 4 on one side.
  • the LEDs 4 are evenly distributed over the base plate 2 and are electrically connected to electrical conductor tracks on the base plate.
  • a reflector 6 extends, which in the illustrated embodiment according to FIG figure 1 in each horizontal section perpendicular to the plane of the image figure 1 defines a square.
  • the reflector 6 is reflective on the inward-facing side.
  • one embodiment provides for the reflector walls to be matt white.
  • the peripheral edge of the reflector forms a light exit opening. This is closed with a cover 8 .
  • the cover 8 is shown in a perspective view in figure 4 and in a side view in figure 5 shown as a single part.
  • the cover 8 is formed from an optically transparent material.
  • the cover 8 has a multiplicity of microstructures on its surface, which are embodied in particular as microlenses or microprisms on a surface of the cover 8 .
  • the microstructures can be distributed on the cover 8 regularly or irregularly. According to FIG. 4 it can be seen that the microstructures are arranged in a regular pattern.
  • the microstructures of the cover 8 have the effect that the light that passes through the cover 8 is deflected laterally. In particular, the microstructures ensure that some of the light is scattered.
  • a special feature of the cover 8 is that it extends inward in the direction of the LEDs 4 in the shape of a pyramid. As a result, there is an angle ⁇ between each side of the cover 8 and a plane parallel to the base 2 or parallel to the plane of the light exit opening formed by the peripheral edge of the reflector 6. In the illustrated embodiments, the angle of inclination ⁇ is 10°. The angle is preferably less than 30° or in particular less than 20°. The shallow angle has the effect that the light is not only scattered at the cover 8, but is also deflected somewhat in the direction of a central axis z of the luminaire.
  • a desired light distribution of the luminaire can be generated which, with large beam angles in relation to the optical axis z (see Fig figure 1 ) falls off more than a uniformly illuminated flat plate (ie the luminaire has a light distribution in a C-plane that is narrower than a Lambertian distribution).
  • improved shielding of the lamp can be achieved as a result.
  • the material of the cover 8 can in particular be a transparent plastic or a glass.
  • the microstructures can in particular be in the form of pyramid-shaped optical elements or lens-shaped optical elements in the surface of the material as a depression or elevation.
  • the pyramidal or lens-shaped indentations, or generally any type of surface texture suitable for causing light expansion, in particular light scattering, can be provided on the side facing towards the illuminant or on the opposite outside of the cover 8 .
  • scattering centers can also be provided within the material or on a surface of the material of the cover 8. Scattering centers can be formed, for example, by small particles in an otherwise transparent glass or plastic material.
  • a kind of frosted glass can be formed by treating the surface by etching or sandblasting.
  • a lamp according to the figure 1 in perspective view is in the figure 6 shown.
  • the light is designed as a recessed or surface-mounted ceiling light.
  • a wide edge preferably extends around the cover 8 in the light exit opening.
  • the luminaire can be integrated into a ceiling or attached to a ceiling.
  • the lamp can also be mounted at a distance from the ceiling, for example as a pendant lamp or floor lamp.
  • the lamp is preferably constructed in such a way that it is mounted with the light exit opening pointing downwards in the direction of an interior space to be illuminated.
  • the light distribution produced by the cover 8 is suitable for this type of lamp installation.
  • the Figures 2 and 3 show alternative embodiments of the lamp.
  • a further reflector 7 is provided on the side of the cover 8 facing away from the illuminant.
  • the reflector serves as a cut-off reflector to improve the shielding of the lamp.
  • the inward-pointing sides of the further reflector 7 are, in particular, of high-gloss design. It is also possible for the reflectors 6 and 7 to be formed in one piece with one another and for the cover 8 to be integrated therein.
  • an array of primary lenses 10 is also provided over the LEDs 4 .
  • the primary lenses 10 can be connected to one another in one piece, as shown in FIGS Figures 13 to 17 shown. As explained below, the primary lenses 10 can have special shapes in order to support the formation of a desired light distribution in combination with the cover 8 .
  • the lamp of the invention is shown without the cover 8. Therefore, the top view of the array of LEDs 4 is visible.
  • the figure 7 includes a LED array 4x3 LEDs.
  • An alternative embodiment is figure 8 shown. Here the LEDs are only arranged on the edge of the base 2 within the reflector 8 .
  • figure 9 shows the lamp figure 8 , primary lenses 10 being arranged above the LEDs.
  • Embodiments as in figure 7 with a diffusely reflecting reflector produce a light distribution in a C-plane, which is shown schematically in FIG figure 11 is shown.
  • the light distribution has a maximum at 0° and falls relatively quickly in the direction of ⁇ 90°.
  • the figure 12 a schematic light distribution in a C-plane of a lamp with a highly specular (specular) reflector, as for example in the figure 3 is shown.
  • the light distribution has a local minimum at 0° and increases towards the flanks up to about ⁇ 15° and then falls relatively quickly towards ⁇ 90°.
  • FIGS 10a to 10d show various embodiments of LED arrays that can be combined with the lights as previously described.
  • the light distributions that are achieved with the LED arrays described above can be generated in particular with LEDs of different colors.
  • LEDs of different colors For example, it is preferable to use the LEDs with a warm light color according to the arrangement in Figure 10c to be provided while LEDs with a colder light color according to the arrangement in the Figure 10d are provided. Both arrangements are combined so that when all LED positions are occupied, an LED array corresponding to the Figure 10a is formed.
  • the different colors have different light distributions.
  • the groups of LEDs can be controlled differently, so that only a warm white or only a cold white light is generated as desired.
  • the light colors can also be controlled separately from one another in this embodiment.
  • the distance from an LED to its perpendicular neighbor according to Figure 10b is, for example, between 10 and 20 mm, in particular about 16 mm.
  • the offset to arranged LEDs according to the array after Figure 10a are spaced halfway apart.
  • the distances between the LEDs in the array are relatively large, so that they would be perceived by the observer as individual points of light if they were viewed directly.
  • the cover 8 ensures that the individual points of light are no longer visible and that the viewer perceives an approximately uniformly illuminated area.
  • an array of primary lenses 10, as in figure 13 shown, are placed directly above the LEDs 4.
  • the figure 14 shows a section through the arrangement of the primary lenses figure 13 .
  • the individual primary lenses On the side facing the LEDs, the individual primary lenses have an entry surface 14 which is surrounded by a cone 16 .
  • the cone has an angle to the optical axis of the LED, so that total reflection takes place at the cone surfaces.
  • the entrance surface 14 in combination with the cone 16 therefore enables the light to be efficiently coupled into the primary lens.
  • the primary lenses can have different radii of curvature, as in FIG figure 15 shown.
  • the primary lenses in a middle ring of the primary lens array have a radius R1.
  • the outer primary lenses have a radius R2 and the center primary lens has a radius R1.
  • a desired light distribution curve can be generated by distributing the radii over the lenses.
  • the primary lenses On the side opposite the LEDs, the primary lenses also have flattened vertices 20, 21 or 22 as in FIG figure 16 shown.
  • the primary lenses 20 at the edge of the array have a flattened crest with a larger diameter D1 than the primary lenses 21 and 22 provided within the array.
  • the primary lenses 21 have a truncated vertex with a diameter D2 and the primary lenses 22 have a truncated vertex with a diameter D3, where D1>D2>D3.
  • the flattened apex of the lenses has the effect that the light distribution after the cover 8 from the LED arrays Figures 10c and 10d or a combination of the two, as in Figure 10a shown, each is the same shape.
  • the LEDs in an array can be Figure 10c and 10d each have different colors. Both LED arrays are superimposed on the arrangement below Figure 10a and thus have the same light distribution curve after penetrating the cover 8, so that both light colors mix homogeneously.
  • the invention is not limited to the illustrated square arrangement of the LED arrays and the light exit surface of the reflector. Round symmetries can also be used, in particular in connection with, for example, conical transparent covers 8 .
  • conical transparent covers 8 can also be used, in particular in connection with, for example, conical transparent covers 8 .
  • rectangular shapes for the light exit surface or the cover are also possible. In this case, for example, a flat pyramidal cover with a rectangular base can be used.
  • the covers are preferably designed to be flat, ie the shorter side is, for example, at least half of a longer side in order to achieve similar optical effects in all directions.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (14)

  1. Appareil d'éclairage, qui comporte une source lumineuse sous la forme d'au moins une DEL (4), ainsi qu'un réflecteur (6), le réflecteur (6) définissant par un bord périphérique du réflecteur une ouverture de sortie de lumière sur un côté opposé à la source lumineuse, un élément de recouvrement (8) transparent plan étant disposé dans l'ouverture de sortie de lumière, lequel comporte, de manière répartie sur l'élément de recouvrement (8), des microstructures dirigeant et/ou dispersant la lumière, et
    l'élément de recouvrement (8) transparent plan s'étendant, par rapport à un plan fictif qui est défini par le bord périphérique du réflecteur (6), vers l'intérieur en direction de la source lumineuse,
    la hauteur (h) de l'élément de recouvrement (8) transparent avec laquelle elle dépasse dans le réflecteur (6) à partir du plan fictif est inférieure à 1/5, de préférence 1/8, du plus grand diamètre dans le plan fictif,
    caractérisé en ce que la forme de l'élément de recouvrement (8) dirigeant la lumière est définie par les parois latérales d'une pyramide ou d'un cône, la face de base de la pyramide ou du cône correspondant au plan fictif.
  2. Appareil d'éclairage selon la revendication 1, un angle (α) qui est formé dans une section transversale perpendiculairement au plan fictif entre la surface de l'élément de recouvrement (8) transparent et le plan fictif étant inférieur à 30°, de préférence inférieur à 20°.
  3. Appareil d'éclairage selon l'une des revendications précédentes, les microstructures comprenant des textures sur une surface de l'élément de recouvrement tournée vers la source lumineuse et/ou éloignée de la source lumineuse.
  4. Appareil d'éclairage selon la revendication 3, les textures comprenant des reliefs ou des creux en forme de lentilles ou de prismes.
  5. Appareil d'éclairage selon l'une des revendications précédentes, les microstructures comportant des particules de dispersion dans le matériau de l'élément de recouvrement (8) et/ou sur l'une des surfaces de l'élément de recouvrement (8).
  6. Appareil d'éclairage selon l'une des revendications précédentes, un réflecteur supplémentaire étant prévu, lequel se raccorde au niveau du bord périphérique sur le côté de l'élément de recouvrement qui est éloigné de la source lumineuse.
  7. Appareil d'éclairage selon l'une des revendications précédentes, le réflecteur (6) et/ou le réflecteur (7) supplémentaire en référence à la revendication 6 étant très brillant ou réfléchissant de façon diffuse, en particulier blanc mat.
  8. Appareil d'éclairage selon l'une des revendications précédentes, la source lumineuse comprenant un groupe de DEL (4) qui sont disposées dans un plan sur le fond (2) du réflecteur (6).
  9. Appareil d'éclairage selon la revendication 8, les DEL (4) étant réparties de façon régulière sur le fond (2) du réflecteur (6), ou les DEL (4) étant disposées le long d'un bord périphérique du fond (2) du réflecteur.
  10. Appareil d'éclairage selon la revendication 8 ou 9, la plus petite distance de chaque DEL (4) ou d'un groupe de DEL à la voisine ou au voisin immédiat(e) étant supérieure à 10 mm.
  11. Appareil d'éclairage selon l'une des revendications 8 à 10, une lentille primaire (10) étant affectée à chaque DEL (4).
  12. Appareil d'éclairage selon la revendication 11, des lentilles primaires (10) dans un anneau extérieur, et/ou une ou plusieurs lentilles primaires (22) au milieu du groupe présentant un rayon de courbure différent de celui présenté par les lentilles primaires (21) des autres DEL (4).
  13. Appareil d'éclairage selon la revendication 11 ou 12, au moins quelques lentilles primaires (20, 21, 22) étant aplaties à leur sommet.
  14. Appareil d'éclairage selon l'une des revendications 11 à 13, les DEL (4) présentant des couleurs différentes, en particulier une couleur de lumière plus froide et une couleur de lumière plus chaude pour délivrer à partir du groupe une lumière blanche mélangée.
EP17703055.8A 2016-01-26 2017-01-25 Appareil d'éclairage muni d'un élément de recouvrement pyramidal ou conique Active EP3408584B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RS20220394A RS63153B1 (sr) 2016-01-26 2017-01-25 Svetiljka sa pokrivačem u obliku piramide ili kupe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016101345.5A DE102016101345A1 (de) 2016-01-26 2016-01-26 Leuchte mit pyramidenförmiger oder kegelförmiger Abdeckung
PCT/EP2017/051557 WO2017129623A1 (fr) 2016-01-26 2017-01-25 Appareil d'éclairage muni d'un élément de recouvrement pyramidal ou conique

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EP3408584A1 EP3408584A1 (fr) 2018-12-05
EP3408584B1 true EP3408584B1 (fr) 2022-04-06

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US (1) US10808911B2 (fr)
EP (1) EP3408584B1 (fr)
DE (1) DE102016101345A1 (fr)
RS (1) RS63153B1 (fr)
WO (1) WO2017129623A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102016104223A1 (de) 2016-01-26 2017-07-27 Siteco Beleuchtungstechnik Gmbh Leuchte mit Indirektbeleuchtung
US10520168B2 (en) * 2017-04-24 2019-12-31 Lite-On Electronics (Guangzhou) Limited Lampshade and lamp
DE102018222327A1 (de) * 2018-12-19 2020-06-25 Frenger Systemen BV Heiz- und Kühltechnik GmbH Strahlflächenaufbau mit Hochvolt-LEDs
EP3964747A1 (fr) * 2020-09-07 2022-03-09 Signify Holding B.V. Distributeur de lumière imprimé en 3d et luminaire comprenant un distributeur de lumière imprimé en 3d

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US20150029717A1 (en) * 2013-07-26 2015-01-29 Bright View Technologies Corporation Shaped microstructure-based optical diffusers for creating batwing and other lighting patterns

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US6773139B2 (en) 2001-09-17 2004-08-10 Gelcore Llp Variable optics spot module
US8529102B2 (en) 2009-04-06 2013-09-10 Cree, Inc. Reflector system for lighting device
DE102010014099A1 (de) 2010-04-07 2011-10-13 Siteco Beleuchtungstechnik Gmbh Leuchte mit Abdeckscheibe
US20140211484A1 (en) * 2012-07-26 2014-07-31 Southpac Trust International Inc, Trustee of the LDH Trust Light modifying elements
WO2012131108A1 (fr) 2011-04-01 2012-10-04 Ntl Lemnis Holding B.V. Source de lumière, lampe et procédé pour fabriquer une source de lumière
US20120262915A1 (en) * 2011-04-18 2012-10-18 Jade Yang Co., Ltd. Led (light-emitting diode) lamp with light reflection
US8324790B1 (en) * 2011-06-07 2012-12-04 Wen-Sung Hu High illumination LED bulb with full emission angle
DE102011107893A1 (de) * 2011-07-18 2013-01-24 Heraeus Noblelight Gmbh Optoelektronisches Modul mit verbesserter Optik
DE102012102119A1 (de) 2012-03-13 2013-09-19 Osram Opto Semiconductors Gmbh Flächenlichtquelle
TW201430280A (zh) 2013-01-28 2014-08-01 鴻海精密工業股份有限公司 照明裝置
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US5309544A (en) * 1992-03-31 1994-05-03 Minnesota Mining And Manufacturing Company Light pipe having optimized cross-section
US20150029717A1 (en) * 2013-07-26 2015-01-29 Bright View Technologies Corporation Shaped microstructure-based optical diffusers for creating batwing and other lighting patterns

Also Published As

Publication number Publication date
RS63153B1 (sr) 2022-05-31
WO2017129623A1 (fr) 2017-08-03
US20190032885A1 (en) 2019-01-31
DE102016101345A1 (de) 2017-07-27
EP3408584A1 (fr) 2018-12-05
US10808911B2 (en) 2020-10-20

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