WO2016162339A1 - Lighting panel for suspended ceiling - Google Patents

Lighting panel for suspended ceiling Download PDF

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Publication number
WO2016162339A1
WO2016162339A1 PCT/EP2016/057446 EP2016057446W WO2016162339A1 WO 2016162339 A1 WO2016162339 A1 WO 2016162339A1 EP 2016057446 W EP2016057446 W EP 2016057446W WO 2016162339 A1 WO2016162339 A1 WO 2016162339A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
lighting
translucent
panel
frame
Prior art date
Application number
PCT/EP2016/057446
Other languages
French (fr)
Inventor
Didier Azorin
Original Assignee
Display Light
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 Display Light filed Critical Display Light
Publication of WO2016162339A1 publication Critical patent/WO2016162339A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/04—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
    • E04B9/0428—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like having a closed frame around the periphery
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/32—Translucent ceilings, i.e. permitting both the transmission and diffusion of light
    • 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
    • F21V13/14—Combinations of only three kinds of elements the elements being filters or photoluminescent elements, 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
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/006—General building constructions or finishing work for buildings, e.g. roofs, gutters, stairs or floors; Garden equipment; Sunshades or parasols
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0003—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being doped with fluorescent agents
    • 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
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • F21V3/0625—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics the material diffusing light, e.g. translucent plastics
    • 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
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • 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
    • F21W2121/00—Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00
    • 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
    • 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 the field of lighting and relates more particularly to a false ceiling lighting slab.
  • the invention applies in particular to the lighting of interior rooms of buildings.
  • the false ceiling 1 comprises, in a known manner, a structure comprising beams 2 whose cross-section is for example in the shape of an H, arranged in a horizontal grid and on which Opaque panels 3 and lighting slabs 4 are usually mounted.
  • Each lighting slab 4 comprises a square-shaped frame 5 which is mounted on the beams 2 and inside which the lighting elements are mounted.
  • a known type of lighting slab includes lighting by one or more neon lights. This type of device is energy-consuming and bulky, which has significant disadvantages. In order to overcome these drawbacks, lighting plates comprising light-emitting diode lighting are nowadays used. The use of light-emitting diodes makes it possible to obtain a lighting slab of smaller thickness and less energy consuming than a neon lighting slab.
  • the frame 5 of a light-emitting diode lighting slab 4A is of square shape and comprises four profiles 6 each forming one side of said frame 5.
  • Each profile 6 has an L-shaped section comprising a vertical side wall 6A and a horizontal support wall 6B, derived from the side wall material 6A and extending perpendicularly from said side wall 6A.
  • the terms “vertical” and “horizontal” are defined here with respect to a horizontal position of the frame relative to a terrestrial frame.
  • the lighting slab 4A further comprises from the bottom up a translucent light diffusing panel 7, called diffuse, mounted to bear on the support walls 6B of the profiles 6, one or more light-emitting diode strips 8 mounted on the side walls 6A of the profiles 6, a luminescent plate 9 for reflecting the light emitted by the light-emitting diodes 8, mounted on the translucent panel 7 and extending between the light-emitting diode strip or strips 8, and a panel 10 for closing the frame of the lighting slab 4A mounted on the support wall 6B by means of fixing screws 11.
  • a translucent light diffusing panel 7, called diffuse mounted to bear on the support walls 6B of the profiles 6, one or more light-emitting diode strips 8 mounted on the side walls 6A of the profiles 6, a luminescent plate 9 for reflecting the light emitted by the light-emitting diodes 8, mounted on the translucent panel 7 and extending between the light-emitting diode strip or strips 8, and a panel 10 for closing the frame of the lighting slab 4A mounted on the support wall 6B
  • the width L1 of the support wall 6B of the profiles 6 must be large enough to support the translucent panel 7 and to mask the light-emitting diodes 8 so that the diodes 8 are not visible when the lighting slab 4A is mounted in a false ceiling 1. In fact, it is undesirable to make the light-emitting diodes 8 visible in order, on the one hand, to preserve the aesthetic side of the lighting slab 4A and, secondly, to prevent the light is directly emitted by the diodes to the eyes of a person under the lighting slab 4A in operation, which could dazzle him or even be dangerous.
  • a translucent plate or film (not shown) representing an image, made of a plastic material and through which the light is diffused to create a decorative false ceiling.
  • a problem arises when one wants to display an image extending over a plurality of lighting plates 4A arranged side by side. Indeed, in this case, a significant portion the image is obscured by the support walls 6B of the lighting plates 4A used to display the image, the width L1 of these support walls 6A being too great, which has another major disadvantage.
  • the light emitted by the light-emitting diodes propagates in the luminescent plate 9 and passes directly through the translucent panel 7, which generates a light that may be uncomfortable for a person under the lighting panel 4A in operation.
  • the invention therefore aims at solving at least in part these disadvantages by proposing a simple, reliable and efficient lighting solution by means of a light-emitting diode slab, in particular making it possible to increase the luminous area of the slab and, in so doing, the visible surface of the slab. an image printed on a plate or a translucent film mounted in the slab.
  • the subject of the invention is a light-emitting diode lighting slab for a false ceiling, said lighting slab comprising:
  • a square-shaped frame comprising four sections each forming one side of said frame, each section comprising a side wall and a support wall of the translucent light-scattering panel,
  • At least one light-emitting diode strip mounted on the side walls of the frame profiles
  • a luminescent plate for reflecting the light emitted by the light-emitting diodes for lighting
  • the lighting slab being remarkable in that the side wall of each profile of the frame comprises, between the light-emitting diode strip and the translucent light-scattering panel, light-guiding means extending from said side wall facing the translucent light scattering panel to guide the light emitted by the diodes to the translucent light scattering panel.
  • the guiding means have a quadruple function of masking the diodes, of supporting the luminescent plate (or even of the diode strip), of reflection of the light emitted by the diodes towards the translucent and definition panel, with the walls of support, a reception groove of the translucent light diffusion panel.
  • the support wall of each profile can thus advantageously be of small width, for example less than 15 mm, preferably less than 10 mm, since it no longer serves to mask the diodes.
  • This small width combined with the light guiding means makes it possible to increase the visible light area of the slab, for example by 10 to 15% compared to a slab of the prior art, while rendering the diodes invisible. for a person looking at the translucent panel of the lighting slab in operation when mounted in a false ceiling.
  • the frame, the translucent panel and the luminescent plate define a closed interior space of the lighting slab in which the light emitted by the light emitting diodes can circulate and can be reflected in part on the translucent panel and on the plate. luminescent.
  • an interior space combined with the light guiding means, makes it possible to increase the brightness of the slab by 10 to 20% compared with a slab of the prior art while providing a soft light because essentially indirect, which is more comfortable for a person under the lighting panel in operation.
  • the light guiding means are derived from material of the side wall of each section of the frame to make easy the assembly of the slab.
  • the profiles can for example be made of aluminum.
  • the support wall is made of material from the side wall and extends perpendicularly from said side wall defining a free end.
  • the width of the support wall is less than 15 mm, preferably less than 10 mm.
  • the light guiding means comprise a beveled portion projecting from the translucent light diffusion panel. Such a tapered portion is easy to make and allows to easily guide the light so that it passes through the translucent panel to the right of said tapered portion.
  • the bevelled portion comprises a planar light-guiding wall defining an angle of between 30 ° and 60 ° with the translucent light-scattering panel, preferably between 40 and 55 °, more preferably of the order of 50 ° or equal to 50 ° in order to effectively reflect the light emitted by the diodes to the portions of the translucent panel located in line with said beveled portion.
  • the light guiding means comprise a connecting portion extending perpendicularly from the side wall of each profile of the frame, parallel to the support wall of said profile, so as to form a groove. receiving the translucent light scattering panel, the beveled portion extending from said connecting portion.
  • a connecting portion adjusts the position of the tapered portion so that it illuminates the translucent panel at the free end of the support wall.
  • the tapered portion comprises a support portion of the luminescent plate in order to prevent the luminescent plate from resting on the translucent panel.
  • the translucent panel is thus not weakened by the weight of the luminescent plate.
  • Such a support of the luminescent plate also makes it possible to define the space inside the slab in which the light emitted by the diodes can flow and be reflected before passing through the translucent panel. The light thus obtained is thus more comfortable for a person under the lighting slab in operation in a false ceiling.
  • the support portion may further support at least a portion of the light emitting diode strip.
  • the bevelled portion defines with the side wall a receiving housing of the profiles fastening means between them, which makes assembly of the frame easy.
  • the lighting slab further comprises, between the translucent light-scattering panel and the reflection-reflecting plate, a decorative plate or a decorative film made of a translucent plastic material and illustrating a image to create a portion of false ceiling light.
  • the invention also relates to a false ceiling of a building comprising a structure comprising a plurality of beams arranged in a horizontal grid and on which is mounted at least one lighting slab as presented above.
  • the false ceiling comprises a plurality of lighting plates each comprising, between the translucent light-scattering panel and the reflection-reflecting plate, a decorative plate or a decorative film made of a plastic material, the plurality of lighting slabs being arranged to form a decorated false ceiling.
  • Figure 1 schematically illustrates in perspective a false ceiling comprising a lighting slab.
  • Figure 2 is a partial cross-sectional view of a lighting slab of the prior art.
  • Figure 3 is a partial cross-sectional view of an embodiment of a lighting slab according to the invention.
  • Figure 4 is a cross-sectional view of a profile of a frame of a lighting slab according to the invention.
  • Figure 5 is a schematic cross-sectional view of a lighting slab according to the invention in operation.
  • the lighting plate according to the invention is a lighting plate with light-emitting diodes.
  • Such slab is particularly intended to be mounted in a false ceiling of a room of a building such as, for example, a corridor, an office, a living room, a room, etc.
  • the lighting slab 40 comprises a frame 50 of square shape defining a parallelepipedal volume and comprising four profiles 60 each forming one side of said frame 50, and from bottom to top with reference to FIG. FIG. 3, a translucent panel 70, a strip of light-emitting diodes 80, a luminescent plate 90, a reflective film 95 and an opaque panel 100 for closing the frame 50 fixed to the frame 50 by a screw system 110.
  • the translucent panel 70 allows the light emitted by the light-emitting diode strip 80 to diffuse outside the lighting slab 40.
  • the reflective film 95 is configured to reflect the light, especially towards the translucent panel 70.
  • the protective film 95 is fixed on the shutter panel 100 so as to extend facing the light-emitting plate 90. In this example, the reflective film 95 is glued to the internal face of the shutter panel 100 (facing the light-emitting plate 100). inside the slab 40).
  • Each profile 60 comprises a side wall 60A and a support wall 60B of the translucent light diffusion panel 70, of width L2 and extending perpendicularly from one end of said side wall 60A.
  • Such profiles 60 may for example be made of aluminum, plastic material (PVC or other) or any suitable material.
  • the translucent panel 70 is thus mounted bearing on the support walls 60A of the profiles 60 of the frame 50 so as to close a face, called "lighting" FE, of the lighting slab 40.
  • the translucent 70 and the luminescent plate 90 delimit a closed internal space INT of the lighting slab 40 in which the light emitted by the diodes of the light-emitting diode strip 80 can circulate and may in particular be reflected in part on the panel.
  • translucent 70, on the luminescent plate 90 and on the profiles 60 are examples of the profiles 60.
  • the light emitting diodes 80 are in a known manner in the form of a strip of diodes fixed on the profiles 60.
  • the strip of light-emitting diodes 80 is fixed, for example by gluing, on the four side walls 60A. profiles 60 of the frame 50 so as to extend entirely along the inner perimeter of the frame 50.
  • the luminescent plate 90 is configured to allow the passage of the light emitted by the light-emitting diodes 80, in particular towards the translucent panel 70.
  • the upper face 91 of the luminescent plate 90 facing the protective film 95 is advantageously treated so as to direct the light towards the translucent panel 70.
  • Such a treatment can be carried out in a known manner by laser, printing or etching so as to form points, lines or guide stripes of the light emitted by the light-emitting diode band 80 to the translucent panel 70.
  • the shutter panel 100 of the frame 50 makes it possible to close off the face of the lighting slab 40, called the "opaque face" FO, opposite to the illumination face FE in order, in particular, to maintain the luminescent plate 90.
  • shutter panel 100 may for example be made of aluminum or any suitable material.
  • the side wall 60A of each profile 60 of the frame 50 comprises, between the light-emitting diode band 80 and the translucent light-diffusing panel 70, light-guiding means. These guiding means extend from said side wall 60A into the inner space INT of the slab 40 facing the translucent translucent light distribution panel 70 so as to guide the light emitted by the diodes of the light-emitting diode strip. illumination 80 to the translucent 70 light scattering panel.
  • the light guiding means comprise a beveled portion 60A-1 and a connecting portion 60A-2 both coming from the material of the lateral wall 60A of the profile 60.
  • connecting portion 60A-2 extends perpendicularly from the side wall 60A, parallel to the support wall 60B and the translucent panel 70, so as to define with said support wall 60B a groove 61 for receiving the translucent panel 70.
  • the width L2 of the support wall 60B can thus advantageously be small, for example less than 15 mm, preferably less than 10 mm, since it does not have the role of masking the diodes of the diode strip.
  • the width L2 of the support wall 60B may be 9 mm.
  • the tapered portion 60A-1 protrudes from the connecting portion 60A-2 to the inner space IT of the slab 40 so as to be positioned opposite the translucent 70 light scattering panel on a length L3 measured along the translucent panel 70.
  • the width L2 and the length L3 are consecutive, that is to say that the support wall 60B does not cover (or very slightly) the beveled portion 60A-1 so as to allow the light to pass through the translucent panel 70 while allowing the support wall 60B to support the panel 70.
  • the bevelled portion 60A-1 comprises a guide wall 60A-11 and a support portion 60A-12 of the light-emitting plate 90 and possibly the light-emitting diode band 80.
  • the guide wall 60A-1 It makes an angle ⁇ of the order of 50 °, with the support wall 60B and with the translucent panel 70 of light scattering. It goes without saying that, in another embodiment, the guide wall 60A-11 could make an angle ⁇ of different value with the support wall 60B and with the translucent 70 light diffusion panel, for example between 30 and 60 °.
  • the tapered portion 60A-1 allows both to mask the diodes for a person looking towards the translucent panel 70 and to guide the light emitted by the diodes to the length zone L3 of the translucent panel 70 arranged at the right of the wall. 60 A-1 guide, which advantageously allows to have a large luminous surface at the translucent panel 70.
  • the bevelled portion 60A-1 defines with the side wall 60A a housing 62 for receiving fastening means of the profiles 60 between them.
  • these fixing means may comprise brackets screwed onto the profiles 60 at the level of the receiving housings 62.
  • the side wall 60A defines a space 63 for receiving a screw 110 for fastening the shutter panel 100 to the frame 50. It goes without saying that this receiving space 63 and this fixing by screws 110 are in no way limiting the scope of the present invention, the shutter panel 100 can be fixed on the frame 50 by any suitable means.
  • the lighting slab 40 according to the invention may further comprise a decorative plate or film (not shown) made of a plastic material, fixed on the translucent panel 70 on the IT interior space side. and illustrating a bright image when the slab 40 is in operation, ie when the diodes 80 are electrically powered to illuminate.
  • the LEDs of the light-emitting diode band 80 emit light through the luminescent plate 90, the shutter panel 100 of the frame 50 preventing this light from leaving the slab 40 by the opaque face FO.
  • a first fraction F1 of this light emitted in the direction of the upper face 91 treated of the luminescent plate 90 and towards the reflective film 95 is reflected obliquely in the luminescent plate 90 while a second fraction F2 of this light is reflected substantially orthogonally to the upper face 91 of the light-emitting plate 90 towards the translucent panel 70 thanks to the treatment performed on the upper face 91 of the light-emitting plate 90.
  • a third fraction F3 of light, emitted in the direction of the guide walls 60A-11 of the profiles 60 passes through the internal space INT of the slab 40 and reaches the guide walls 60 A-11 of the profiles 60 on which it is reflected in the direction of the translucent panel 70 that it then passes at the level of the peripheral zone of width L3 of the translucent panel 70 located at right of said guide walls 60A-11, thus allowing light to diffuse over a large surface of the translucent panel 70, in particular at its edges.
  • the guide walls 60A-11 make it possible to use support walls 60B of small width which advantageously make it possible to diffuse the light over a large surface of the translucent panel 70 of the slab 40.
  • the invention is particularly advantageous when a plurality of lighting slabs 40 are mounted in a false ceiling and each comprise a plate or a decorative film for constituting a decorated ceiling because, in this case, the small thickness of the walls of support 60B makes it possible to display a large quantity of said decorated ceiling.
  • the present invention is not limited to the examples described above and is capable of numerous variants accessible to those skilled in the art.
  • the dimensions, shapes and arrangement of the various elements of the lighting slab as shown in the figures so as to illustrate an exemplary embodiment of the invention can not be interpreted as limiting.

Abstract

The invention relates to an LED lighting panel (40) for a suspended ceiling including a translucent panel (70) for diffusing the light, four profile members (60) forming a frame (50) and including a side wall (60A) and a wall (60B) for supporting the translucent panel (70) for diffusing the light and at least one strip of lighting LEDs (80). The side wall (60A) of each profile member (60) of the frame (50) includes, between the strip of lighting LEDs (80) and the translucent panel (70), means (60A-1) for guiding the light extending from said side wall (60A) opposite the translucent panel (70) for diffusing the light so as to guide the light emitted by the diodes towards the translucent panel (70) for diffusing the light.

Description

DALLE D'ECLAIRAGE POUR FAUX-PLAFOND  LIGHTING SLAB FOR FALSE CEILING
DOMAINE TECHNIQUE ET OBJET DE L'INVENTION La présente invention se rapporte au domaine de l'éclairage et concerne plus particulièrement une dalle d'éclairage pour faux-plafond. L'invention s'applique en particulier à l'éclairage de pièces intérieures d'immeubles. TECHNICAL FIELD AND OBJECT OF THE INVENTION The present invention relates to the field of lighting and relates more particularly to a false ceiling lighting slab. The invention applies in particular to the lighting of interior rooms of buildings.
ETAT DE LA TECHNIQUE STATE OF THE ART
Afin d'éclairer une pièce telle que, par exemple, un bureau ou un couloir, il est connu de monter des dalles d'éclairage, encore appelées dalles lumineuses, dans un faux-plafond fixé sous le plafond de la pièce. A cette fin, comme illustré dans l'exemple donné à la figure 1, le faux-plafond 1 comprend de manière connue une structure comportant des poutrelles 2 dont la section est par exemple en forme de H, disposées selon un quadrillage horizontal et sur lesquelles sont ordinairement montés des panneaux opaques 3 et des dalles d'éclairage 4. Chaque dalle d'éclairage 4 comprend un cadre 5 de forme carrée qui est monté sur les poutrelles 2 et à l'intérieur duquel sont montés les éléments d'éclairage. In order to illuminate a room such as, for example, an office or a corridor, it is known to mount lighting slabs, also called slabs of light, in a false ceiling fixed under the ceiling of the room. For this purpose, as illustrated in the example given in FIG. 1, the false ceiling 1 comprises, in a known manner, a structure comprising beams 2 whose cross-section is for example in the shape of an H, arranged in a horizontal grid and on which Opaque panels 3 and lighting slabs 4 are usually mounted. Each lighting slab 4 comprises a square-shaped frame 5 which is mounted on the beams 2 and inside which the lighting elements are mounted.
Un type connu de dalle d'éclairage comprend un éclairage par un ou plusieurs néons. Ce genre de dispositif est énergivore et volumineux, ce qui présente des inconvénients importants. Afin de remédier à ces inconvénients, on utilise de nos jours des dalles d'éclairage comprenant un éclairage par diodes électroluminescentes. L'utilisation de diodes électroluminescentes permet d'obtenir une dalle d'éclairage de faible épaisseur et moins énergivore qu'une dalle d'éclairage à néons. De manière connue, comme illustré sur la vue en coupe de la figure 2, le cadre 5 d'une dalle d'éclairage 4A à diodes électroluminescentes est de forme carrée et comporte quatre profilés 6 formant chacun un côté dudit cadre 5. Chaque profilé 6 présente une section en forme de L comprenant une paroi latérale 6A verticale et une paroi de support 6B horizontale, issue de matière de la paroi latérale 6A et s'étendant perpendiculairement depuis ladite paroi latérale 6A. Les termes « verticale » et « horizontale » sont définis ici par rapport à une position horizontale du cadre par rapport à un référentiel terrestre. La dalle d'éclairage 4A comprend en outre de bas en haut un panneau translucide 7 de diffusion de la lumière, appelé diffus, monté en appui sur les parois de support 6B des profilés 6, une ou plusieurs bandes de diodes électroluminescentes d'éclairage 8 montées sur les parois latérales 6A des profilés 6, une plaque luminescente 9 de réflexion de la lumière émise par les diodes électroluminescentes d'éclairage 8, montée sur le panneau translucide 7 et s'étendant entre la ou les bandes de diodes électroluminescentes d'éclairage 8, et un panneau 10 d'obturation du cadre de la dalle d'éclairage 4A monté sur la paroi de support 6B par l'intermédiaire de vis de fixation 11. Ainsi, en référence à la figure 1, lorsque la dalle d'éclairage 4A est montée dans un faux-plafond 1, le cadre 5 repose en appui sur les poutrelles 2 par l'intermédiaire des parois de support 6B des profilés 6. A known type of lighting slab includes lighting by one or more neon lights. This type of device is energy-consuming and bulky, which has significant disadvantages. In order to overcome these drawbacks, lighting plates comprising light-emitting diode lighting are nowadays used. The use of light-emitting diodes makes it possible to obtain a lighting slab of smaller thickness and less energy consuming than a neon lighting slab. In known manner, as illustrated in the sectional view of FIG. 2, the frame 5 of a light-emitting diode lighting slab 4A is of square shape and comprises four profiles 6 each forming one side of said frame 5. Each profile 6 has an L-shaped section comprising a vertical side wall 6A and a horizontal support wall 6B, derived from the side wall material 6A and extending perpendicularly from said side wall 6A. The terms "vertical" and "horizontal" are defined here with respect to a horizontal position of the frame relative to a terrestrial frame. The lighting slab 4A further comprises from the bottom up a translucent light diffusing panel 7, called diffuse, mounted to bear on the support walls 6B of the profiles 6, one or more light-emitting diode strips 8 mounted on the side walls 6A of the profiles 6, a luminescent plate 9 for reflecting the light emitted by the light-emitting diodes 8, mounted on the translucent panel 7 and extending between the light-emitting diode strip or strips 8, and a panel 10 for closing the frame of the lighting slab 4A mounted on the support wall 6B by means of fixing screws 11. Thus, with reference to FIG. 1, when the lighting slab 4A is mounted in a false ceiling 1, the frame 5 rests against the beams 2 via the support walls 6B of the profiles 6.
La largeur Ll de la paroi de support 6B des profilés 6 doit être suffisamment importante pour, d'une part, supporter le panneau translucide 7, et, d'autre part, pour masquer les diodes électroluminescentes d'éclairage 8 de sorte que lesdites diodes 8 ne soient pas visibles lorsque la dalle d'éclairage 4A est montée dans un faux-plafond 1. En effet, il n'est pas souhaitable de rendre visible les diodes électroluminescentes d'éclairage 8 afin, d'une part, de conserver le côté esthétique de la dalle d'éclairage 4A et, d'autre part, d'éviter que la lumière ne soit directement émises par les diodes vers les yeux d'une personne située sous la dalle d'éclairage 4A en fonctionnement, ce qui pourrait l'éblouir voire s'avérer dangereux. The width L1 of the support wall 6B of the profiles 6 must be large enough to support the translucent panel 7 and to mask the light-emitting diodes 8 so that the diodes 8 are not visible when the lighting slab 4A is mounted in a false ceiling 1. In fact, it is undesirable to make the light-emitting diodes 8 visible in order, on the one hand, to preserve the aesthetic side of the lighting slab 4A and, secondly, to prevent the light is directly emitted by the diodes to the eyes of a person under the lighting slab 4A in operation, which could dazzle him or even be dangerous.
Cependant, la largeur Ll de la paroi de support 6B des profilés 6, qui est importante, par exemple de l'ordre de 25 mm, réduit significativement la surface lumineuse de la dalle 4A, ce qui présente un inconvénient majeur. En particulier, il est connu de monter, entre le panneau translucide 7 et la plaque luminescente 9, une plaque ou un film translucide (non représenté) représentant une image, réalisé en un matériau plastique et à travers lequel la lumière est diffusée afin de créer un faux-plafond lumineux décoré. Or, un problème se pose lorsque l'on veut afficher une image s'étendant sur une pluralité de dalles d'éclairage 4A disposées côte-à-côte. En effet, dans ce cas, une portion significative de l'image est occultée par les parois de support 6B des dalles d'éclairage 4A utilisées pour afficher l'image, la largeur Ll de ces parois de support 6A étant trop importante, ce qui présente un autre inconvénient majeur. De plus, la lumière émise par les diodes électroluminescentes se propage dans la plaque luminescente 9 et traverse directement le panneau translucide 7, ce qui génère une lumière qui peut s'avérer inconfortable pour une personne située sous la dalle d'éclairage 4A en fonctionnement. L'invention vise donc à résoudre au moins en partie ces inconvénients en proposant une solution simple, fiable et efficace d'éclairage par dalle à diodes électroluminescentes permettant notamment d'augmenter la surface lumineuse de la dalle et, ce faisant, la surface visible d'une image imprimée sur une plaque ou un film translucide monté dans la dalle. However, the width L1 of the support wall 6B of the profiles 6, which is important, for example of the order of 25 mm, significantly reduces the luminous surface of the slab 4A, which has a major disadvantage. In particular, it is known to mount, between the translucent panel 7 and the luminescent plate 9, a translucent plate or film (not shown) representing an image, made of a plastic material and through which the light is diffused to create a decorative false ceiling. However, a problem arises when one wants to display an image extending over a plurality of lighting plates 4A arranged side by side. Indeed, in this case, a significant portion the image is obscured by the support walls 6B of the lighting plates 4A used to display the image, the width L1 of these support walls 6A being too great, which has another major disadvantage. In addition, the light emitted by the light-emitting diodes propagates in the luminescent plate 9 and passes directly through the translucent panel 7, which generates a light that may be uncomfortable for a person under the lighting panel 4A in operation. The invention therefore aims at solving at least in part these disadvantages by proposing a simple, reliable and efficient lighting solution by means of a light-emitting diode slab, in particular making it possible to increase the luminous area of the slab and, in so doing, the visible surface of the slab. an image printed on a plate or a translucent film mounted in the slab.
PRESENTATION GENERALE DE L'INVENTION GENERAL PRESENTATION OF THE INVENTION
A cet effet, l'invention a pour objet une dalle d'éclairage à diodes électroluminescentes pour faux-plafond, ladite dalle d'éclairage comprenant : For this purpose, the subject of the invention is a light-emitting diode lighting slab for a false ceiling, said lighting slab comprising:
- un panneau translucide de diffusion de la lumière, a translucent light diffusion panel,
- un cadre de forme carrée comprenant quatre profilés formant chacun un côté dudit cadre, chaque profilé comprenant une paroi latérale et une paroi de support du panneau translucide de diffusion de la lumière,  a square-shaped frame comprising four sections each forming one side of said frame, each section comprising a side wall and a support wall of the translucent light-scattering panel,
- au moins une bande de diodes électroluminescentes d'éclairage montée sur les parois latérales des profilés du cadre,  at least one light-emitting diode strip mounted on the side walls of the frame profiles,
- une plaque luminescente de réflexion de la lumière émise par les diodes électroluminescentes d'éclairage, et  a luminescent plate for reflecting the light emitted by the light-emitting diodes for lighting, and
- un panneau d'obturation du cadre,  a shutter panel of the frame,
la dalle d'éclairage étant remarquable en ce que la paroi latérale de chaque profilé du cadre comprend, entre la bande de diodes électroluminescentes d'éclairage et le panneau translucide de diffusion de la lumière, des moyens de guidage de la lumière s'étendant depuis ladite paroi latérale en regard du panneau translucide de diffusion de la lumière de manière à guider la lumière émise par les diodes vers le panneau translucide de diffusion de la lumière. Les moyens de guidage possèdent une quadruple fonction de masquage des diodes, de support de la plaque luminescente (voire également de la bande de diodes), de réflexion de la lumière émise par les diodes vers le panneau translucide et de définition, avec les parois de support, d'une rainure de réception du panneau translucide de diffusion de la lumière. La paroi de support de chaque profilé peut ainsi avantageusement être de faible largeur, par exemple inférieure à 15 mm, de préférence inférieure à 10 mm, puisqu'elle n'a plus pour fonction de masquer les diodes. Cette faible largeur, combinée avec les moyens de guidage de la lumière permet d'augmenter la surface de lumière visible de la dalle, par exemple de 10 à 15 % par rapport à une dalle de l'art antérieur, tout en rendant les diodes invisibles pour une personne regardant le panneau translucide de la dalle d'éclairage en fonctionnement lorsqu'elle est montée dans un faux-plafond. the lighting slab being remarkable in that the side wall of each profile of the frame comprises, between the light-emitting diode strip and the translucent light-scattering panel, light-guiding means extending from said side wall facing the translucent light scattering panel to guide the light emitted by the diodes to the translucent light scattering panel. The guiding means have a quadruple function of masking the diodes, of supporting the luminescent plate (or even of the diode strip), of reflection of the light emitted by the diodes towards the translucent and definition panel, with the walls of support, a reception groove of the translucent light diffusion panel. The support wall of each profile can thus advantageously be of small width, for example less than 15 mm, preferably less than 10 mm, since it no longer serves to mask the diodes. This small width, combined with the light guiding means makes it possible to increase the visible light area of the slab, for example by 10 to 15% compared to a slab of the prior art, while rendering the diodes invisible. for a person looking at the translucent panel of the lighting slab in operation when mounted in a false ceiling.
Le cadre, le panneau translucide et la plaque luminescente délimitent un espace intérieur fermé de la dalle d'éclairage dans lequel la lumière émise par les diodes électroluminescentes d'éclairage peut circuler et peut notamment se réfléchir en partie sur le panneau translucide et sur la plaque luminescente. Avantageusement, un tel espace intérieur, combiné aux moyens de guidage de la lumière, permet d'augmenter la luminosité de la dalle de 10 à 20 % par rapport à une dalle de l'art antérieur tout en fournissant une lumière douce car essentiellement indirecte, ce qui est plus confortable pour une personne située sous la dalle d'éclairage en fonctionnement. The frame, the translucent panel and the luminescent plate define a closed interior space of the lighting slab in which the light emitted by the light emitting diodes can circulate and can be reflected in part on the translucent panel and on the plate. luminescent. Advantageously, such an interior space, combined with the light guiding means, makes it possible to increase the brightness of the slab by 10 to 20% compared with a slab of the prior art while providing a soft light because essentially indirect, which is more comfortable for a person under the lighting panel in operation.
De préférence, les moyens de guidage de la lumière sont issus de matière de la paroi latérale de chaque profilé du cadre afin de rendre aisé l'assemblage de la dalle. Les profilés peuvent par exemple être réalisés en aluminium. Preferably, the light guiding means are derived from material of the side wall of each section of the frame to make easy the assembly of the slab. The profiles can for example be made of aluminum.
Dans une forme de réalisation préférée, la paroi de support est issue de matière de la paroi latérale et s'étend perpendiculairement depuis ladite paroi latérale en définissant une extrémité libre. In a preferred embodiment, the support wall is made of material from the side wall and extends perpendicularly from said side wall defining a free end.
Avantageusement, la largeur de la paroi de support est inférieure à 15 mm, de préférence inférieure à 10 mm. De préférence encore, les moyens de guidage de la lumière comprennent une portion biseautée s'étendant en saillie en regard du panneau translucide de diffusion de la lumière. Une telle portion biseautée est aisée à réaliser et permet de guider aisément la lumière pour qu'elle traverse le panneau translucide au droit de ladite portion biseautée. Advantageously, the width of the support wall is less than 15 mm, preferably less than 10 mm. More preferably, the light guiding means comprise a beveled portion projecting from the translucent light diffusion panel. Such a tapered portion is easy to make and allows to easily guide the light so that it passes through the translucent panel to the right of said tapered portion.
Selon une caractéristique de l'invention, la portion biseautée comprend une paroi de guidage de la lumière, plane, définissant un angle compris entre 30° et 60° avec le panneau translucide de diffusion de la lumière, de préférence entre 40 et 55°, de préférence encore de l'ordre de 50° ou égal à 50° afin de réfléchir efficacement la lumière émise par les diodes vers les portions du panneau translucide situées au droit de ladite portion biseautée. According to one characteristic of the invention, the bevelled portion comprises a planar light-guiding wall defining an angle of between 30 ° and 60 ° with the translucent light-scattering panel, preferably between 40 and 55 °, more preferably of the order of 50 ° or equal to 50 ° in order to effectively reflect the light emitted by the diodes to the portions of the translucent panel located in line with said beveled portion.
Selon un aspect de l'invention, les moyens de guidage de la lumière comprennent une portion de liaison s'étendant perpendiculairement depuis la paroi latérale de chaque profilé du cadre, parallèlement à la paroi de support dudit profilé, de manière à former une rainure de réception du panneau translucide de diffusion de la lumière, la portion biseautée s'étendant depuis ladite portion de liaison. Une telle portion de liaison permet d'ajuster la position de la portion biseautée de sorte qu'elle éclaire le panneau translucide au niveau de l'extrémité libre de la paroi de support. According to one aspect of the invention, the light guiding means comprise a connecting portion extending perpendicularly from the side wall of each profile of the frame, parallel to the support wall of said profile, so as to form a groove. receiving the translucent light scattering panel, the beveled portion extending from said connecting portion. Such a connecting portion adjusts the position of the tapered portion so that it illuminates the translucent panel at the free end of the support wall.
De manière avantageuse encore, la portion biseautée comprend une portion de support de la plaque luminescente afin d'éviter que la plaque luminescente soit en appui sur le panneau translucide. Le panneau translucide n'est ainsi pas fragilisé par le poids de la plaque luminescente. Un tel support de la plaque luminescente permet en outre de délimiter l'espace intérieur à la dalle dans lequel la lumière émise par les diodes peut circuler et se réfléchir avant de traverser le panneau translucide. La lumière ainsi obtenue est ainsi plus confortable pour une personne située sous la dalle d'éclairage en fonctionnement dans un faux-plafond. Dans une forme de réalisation, la portion de support peut en outre supporter au moins en partie la bande de diodes électroluminescentes d'éclairage. Selon une caractéristique de l'invention, la portion biseautée définit avec la paroi latérale un logement de réception de moyens de fixation des profilés entre eux, ce qui rend l'assemblage du cadre aisé. Selon un aspect avantageux de l'invention, la dalle d'éclairage comprend en outre, entre le panneau translucide de diffusion de la lumière et la plaque luminescente de réflexion, une plaque décorative ou un film décoratif réalisé en un matériau plastique translucide et illustrant une image permettant de créer une portion de faux-plafond lumineux. L'invention concerne aussi un faux-plafond d'un immeuble comprenant une structure comportant une pluralité de poutrelles disposées selon un quadrillage horizontal et sur certaines desquelles est montée au moins une dalle d'éclairage telle que présentée précédemment. De préférence, le faux-plafond comprend une pluralité de dalles d'éclairage comprenant chacune, entre le panneau translucide de diffusion de la lumière et la plaque luminescente de réflexion, une plaque décorative ou un film décoratif réalisé en un matériau plastique, la pluralité de dalles d'éclairage étant disposée de manière à former un faux-plafond décoré. Advantageously again, the tapered portion comprises a support portion of the luminescent plate in order to prevent the luminescent plate from resting on the translucent panel. The translucent panel is thus not weakened by the weight of the luminescent plate. Such a support of the luminescent plate also makes it possible to define the space inside the slab in which the light emitted by the diodes can flow and be reflected before passing through the translucent panel. The light thus obtained is thus more comfortable for a person under the lighting slab in operation in a false ceiling. In one embodiment, the support portion may further support at least a portion of the light emitting diode strip. According to a feature of the invention, the bevelled portion defines with the side wall a receiving housing of the profiles fastening means between them, which makes assembly of the frame easy. According to an advantageous aspect of the invention, the lighting slab further comprises, between the translucent light-scattering panel and the reflection-reflecting plate, a decorative plate or a decorative film made of a translucent plastic material and illustrating a image to create a portion of false ceiling light. The invention also relates to a false ceiling of a building comprising a structure comprising a plurality of beams arranged in a horizontal grid and on which is mounted at least one lighting slab as presented above. Preferably, the false ceiling comprises a plurality of lighting plates each comprising, between the translucent light-scattering panel and the reflection-reflecting plate, a decorative plate or a decorative film made of a plastic material, the plurality of lighting slabs being arranged to form a decorated false ceiling.
D'autres caractéristiques et avantages de l'invention apparaîtront lors de la description qui suit faite en regard des figures annexées données à titre d'exemples non limitatifs et dans lesquelles des références identiques sont données à des objets semblables. DESCRIPTION DES FIGURES Other features and advantages of the invention will become apparent from the following description given with reference to the appended figures given by way of non-limiting examples and in which identical references are given to similar objects. DESCRIPTION OF THE FIGURES
La figure 1 illustre schématiquement en perspective un faux-plafond comportant une dalle d'éclairage. Figure 1 schematically illustrates in perspective a false ceiling comprising a lighting slab.
La figure 2 est une vue partielle en coupe transversale d'une dalle d'éclairage de l'art antérieur.  Figure 2 is a partial cross-sectional view of a lighting slab of the prior art.
La figure 3 est une vue partielle en coupe transversale d'une forme de réalisation d'une dalle d'éclairage selon l'invention.  Figure 3 is a partial cross-sectional view of an embodiment of a lighting slab according to the invention.
La figure 4 est une vue en coupe transversale d'un profilé d'un cadre d'une dalle d'éclairage selon l'invention. La figure 5 est une vue schématique en coupe transversale d'une dalle d'éclairage selon l'invention en fonctionnement. Figure 4 is a cross-sectional view of a profile of a frame of a lighting slab according to the invention. Figure 5 is a schematic cross-sectional view of a lighting slab according to the invention in operation.
DESCRIPTION DETAILLEE DE L'INVENTION Description d'une forme de réalisation du système selon l'invention DETAILED DESCRIPTION OF THE INVENTION Description of an embodiment of the system according to the invention
La dalle d'éclairage selon l'invention est une dalle d'éclairage à diodes électroluminescentes. Une telle dalle est notamment destinée à être montée dans un faux-plafond d'une pièce d'un immeuble telle que, par exemple, un couloir, un bureau, un salon, une chambre, etc. The lighting plate according to the invention is a lighting plate with light-emitting diodes. Such slab is particularly intended to be mounted in a false ceiling of a room of a building such as, for example, a corridor, an office, a living room, a room, etc.
En référence à la figure 3, la dalle d'éclairage 40 selon l'invention comprend un cadre 50 de forme carrée définissant un volume parallélépipédique et comportant quatre profilés 60 formant chacun un côté dudit cadre 50, et, de bas en haut en référence à la figure 3, un panneau translucide 70, une bande de diodes électroluminescentes 80, une plaque luminescente 90, un film réflecteur 95 et un panneau 100, opaque, d'obturation du cadre 50 fixé sur le cadre 50 par un système de vis 110. Il va de soi que tout autre moyen de fixation du panneau d'obturation 100 sur le cadre 50 pourrait être utilisé. Le panneau translucide 70 permet la diffusion de la lumière émise par la bande de diodes électroluminescentes 80 à l'extérieur de la dalle d'éclairage 40. Le film réflecteur 95 est configuré pour réfléchir la lumière, notamment en direction du panneau translucide 70. Le film protecteur 95 est fixé sur le panneau d'obturation 100 de sorte à s'étendre en regard de la plaque luminescente 90. Dans cet exemple, le film réflecteur 95 est collé sur la face interne du panneau d'obturation 100 (orientée vers l'intérieur de la dalle 40). With reference to FIG. 3, the lighting slab 40 according to the invention comprises a frame 50 of square shape defining a parallelepipedal volume and comprising four profiles 60 each forming one side of said frame 50, and from bottom to top with reference to FIG. FIG. 3, a translucent panel 70, a strip of light-emitting diodes 80, a luminescent plate 90, a reflective film 95 and an opaque panel 100 for closing the frame 50 fixed to the frame 50 by a screw system 110. It goes without saying that any other means of fixing the shutter panel 100 on the frame 50 could be used. The translucent panel 70 allows the light emitted by the light-emitting diode strip 80 to diffuse outside the lighting slab 40. The reflective film 95 is configured to reflect the light, especially towards the translucent panel 70. The protective film 95 is fixed on the shutter panel 100 so as to extend facing the light-emitting plate 90. In this example, the reflective film 95 is glued to the internal face of the shutter panel 100 (facing the light-emitting plate 100). inside the slab 40).
Chaque profilé 60 comprend une paroi latérale 60A et une paroi de support 60B du panneau translucide 70 de diffusion de la lumière, de largeur L2 et s'étendant perpendiculairement depuis une extrémité de ladite paroi latérale 60A. De tels profilés 60 peuvent par exemple être réalisés en aluminium, en matériau plastique (PVC ou autre) ou tout matériau adapté. Le panneau translucide 70 est ainsi monté en appui sur les parois de support 60A des profilés 60 du cadre 50 de manière à fermer une face, dite « d'éclairage » FE, de la dalle d'éclairage 40. Le cadre 50, le panneau translucide 70 et la plaque luminescente 90 délimitent un espace intérieur INT fermé de la dalle d'éclairage 40 dans lequel la lumière émise par les diodes de la bande de diodes électroluminescentes d'éclairage 80 peut circuler et peut notamment se réfléchir en partie sur le panneau translucide 70, sur la plaque luminescente 90 et sur les profilés 60. Each profile 60 comprises a side wall 60A and a support wall 60B of the translucent light diffusion panel 70, of width L2 and extending perpendicularly from one end of said side wall 60A. Such profiles 60 may for example be made of aluminum, plastic material (PVC or other) or any suitable material. The translucent panel 70 is thus mounted bearing on the support walls 60A of the profiles 60 of the frame 50 so as to close a face, called "lighting" FE, of the lighting slab 40. The frame 50, the panel The translucent 70 and the luminescent plate 90 delimit a closed internal space INT of the lighting slab 40 in which the light emitted by the diodes of the light-emitting diode strip 80 can circulate and may in particular be reflected in part on the panel. translucent 70, on the luminescent plate 90 and on the profiles 60.
Les diodes électroluminescentes d'éclairage 80 se présentent de manière connue sous la forme d'une bande de diodes fixée sur les profilés 60. La bande de diodes électroluminescentes d'éclairage 80 est fixée, par exemple par collage, sur les quatre parois latérales 60A des profilés 60 du cadre 50 de manière à s'étendre entièrement le long du périmètre intérieur du cadre 50. The light emitting diodes 80 are in a known manner in the form of a strip of diodes fixed on the profiles 60. The strip of light-emitting diodes 80 is fixed, for example by gluing, on the four side walls 60A. profiles 60 of the frame 50 so as to extend entirely along the inner perimeter of the frame 50.
La plaque luminescente 90 est configurée pour autoriser le passage de la lumière émise par les diodes électroluminescentes d'éclairage 80, notamment en direction du panneau translucide 70. A cette fin, la face supérieure 91 de la plaque luminescente 90, se trouvant en regard du film protecteur 95, est avantageusement traitée de manière à diriger la lumière vers le panneau translucide 70. Un tel traitement peut être réalisé de manière connue par laser, impression ou gravure de manière à former des points, des lignes ou des rayures de guidage de la lumière émise par la bande de diodes électroluminescentes d'éclairage 80 vers le panneau translucide 70. The luminescent plate 90 is configured to allow the passage of the light emitted by the light-emitting diodes 80, in particular towards the translucent panel 70. For this purpose, the upper face 91 of the luminescent plate 90 facing the protective film 95, is advantageously treated so as to direct the light towards the translucent panel 70. Such a treatment can be carried out in a known manner by laser, printing or etching so as to form points, lines or guide stripes of the light emitted by the light-emitting diode band 80 to the translucent panel 70.
Enfin, le panneau d'obturation 100 du cadre 50 permet d'obturer la face de la dalle d'éclairage 40, dite « face opaque » FO, opposée à la face d'éclairage FE afin notamment de maintenir la plaque luminescente 90. Un tel panneau d'obturation 100 peut être par exemple réalisé en aluminium ou tout matériau adapté. Finally, the shutter panel 100 of the frame 50 makes it possible to close off the face of the lighting slab 40, called the "opaque face" FO, opposite to the illumination face FE in order, in particular, to maintain the luminescent plate 90. such shutter panel 100 may for example be made of aluminum or any suitable material.
Lorsque la dalle d'éclairage 40 est montée dans un faux-plafond horizontal, la face d'éclairage FE est orientée vers le bas (i.e. vers le sol) tandis que la face opaque FO est orientée vers le haut (i.e. vers le plafond). Selon l'invention, la paroi latérale 60A de chaque profilé 60 du cadre 50 comprend, entre la bande de diodes électroluminescentes d'éclairage 80 et le panneau translucide 70 de diffusion de la lumière, des moyens de guidage de la lumière. Ces moyens de guidage s'étendent depuis ladite paroi latérale 60A dans l'espace intérieur INT de la dalle 40 en regard du panneau translucide 70 de diffusion de la lumière de manière à guider la lumière émise par les diodes de la bande de diodes électroluminescentes d'éclairage 80 vers le panneau translucide 70 de diffusion de la lumière. When the lighting slab 40 is mounted in a horizontal false ceiling, the lighting face FE is oriented downwards (ie towards the ground) while the opaque face FO is oriented upwards (ie toward the ceiling) . According to the invention, the side wall 60A of each profile 60 of the frame 50 comprises, between the light-emitting diode band 80 and the translucent light-diffusing panel 70, light-guiding means. These guiding means extend from said side wall 60A into the inner space INT of the slab 40 facing the translucent translucent light distribution panel 70 so as to guide the light emitted by the diodes of the light-emitting diode strip. illumination 80 to the translucent 70 light scattering panel.
Dans cet exemple préféré, en référence aux figures 3 et 4, les moyens de guidage de la lumière comprennent une portion biseautée 60A-1 et une portion de liaison 60A-2 toutes deux issues de matière de la paroi latérale 60A du profilé 60. La portion de liaison 60A-2 s'étend perpendiculairement depuis la paroi latérale 60A, parallèlement à la paroi de support 60B et au panneau translucide 70, de sorte à délimiter avec ladite paroi de support 60B une rainure 61 de réception du panneau translucide 70. La largeur L2 de la paroi de support 60B peut ainsi avantageusement être de faible dimension, par exemple inférieur à 15 mm, de préférence inférieur à 10 mm, étant donné qu'elle n'a pas pour rôle de masquer les diodes de la bande de diodes électroluminescentes d'éclairage 80. A titre d'exemple, la largeur L2 de la paroi de support 60B peut être de 9 mm. In this preferred example, with reference to FIGS. 3 and 4, the light guiding means comprise a beveled portion 60A-1 and a connecting portion 60A-2 both coming from the material of the lateral wall 60A of the profile 60. connecting portion 60A-2 extends perpendicularly from the side wall 60A, parallel to the support wall 60B and the translucent panel 70, so as to define with said support wall 60B a groove 61 for receiving the translucent panel 70. The width L2 of the support wall 60B can thus advantageously be small, for example less than 15 mm, preferably less than 10 mm, since it does not have the role of masking the diodes of the diode strip. By way of example, the width L2 of the support wall 60B may be 9 mm.
La portion biseautée 60A-1 s'étend en saillie depuis la portion de liaison 60A-2 vers l'espace intérieur I T de la dalle 40 de sorte à être positionnée en regard du panneau translucide 70 de diffusion de la lumière sur une longueur L3 mesurée le long du panneau translucide 70. Comme illustré sur les figures 3 à 5, la largeur L2 et la longueur L3 sont consécutives, c'est-à-dire que la paroi de support 60B ne recouvre pas (ou très légèrement) la portion biseautée 60A-1 de sorte à permettre à la lumière de traverser le panneau translucide 70 tout en permettant à la paroi de support 60B de supporter le panneau 70. La portion biseautée 60A-1 comprend une paroi de guidage 60A-11 et une portion de support 60A-12 de la plaque luminescente 90 et éventuellement de la bande de diodes électroluminescentes d'éclairage 80. Dans cet exemple, la paroi de guidage 60A-11 fait un angle a de l'ordre de 50°, avec la paroi de support 60B et avec le panneau translucide 70 de diffusion de la lumière. Il va de soi que, dans une autre forme de réalisation, la paroi de guidage 60A-11 pourrait faire un angle a de valeur différente avec la paroi de support 60B et avec le panneau translucide 70 de diffusion de la lumière, par exemple comprise entre 30 et 60°. The tapered portion 60A-1 protrudes from the connecting portion 60A-2 to the inner space IT of the slab 40 so as to be positioned opposite the translucent 70 light scattering panel on a length L3 measured along the translucent panel 70. As illustrated in Figures 3 to 5, the width L2 and the length L3 are consecutive, that is to say that the support wall 60B does not cover (or very slightly) the beveled portion 60A-1 so as to allow the light to pass through the translucent panel 70 while allowing the support wall 60B to support the panel 70. The bevelled portion 60A-1 comprises a guide wall 60A-11 and a support portion 60A-12 of the light-emitting plate 90 and possibly the light-emitting diode band 80. In this example, the guide wall 60A-1 It makes an angle α of the order of 50 °, with the support wall 60B and with the translucent panel 70 of light scattering. It goes without saying that, in another embodiment, the guide wall 60A-11 could make an angle α of different value with the support wall 60B and with the translucent 70 light diffusion panel, for example between 30 and 60 °.
La portion biseautée 60A-1 permet à la fois de masquer les diodes pour une personne regardant en direction du panneau translucide 70 et de guider la lumière émise par les diodes vers la zone de longueur L3 du panneau translucide 70 disposée au droit de la paroi de guidage 60 A- 1, ce qui permet avantageusement de disposer d'une surface lumineuse importante au niveau du panneau translucide 70. The tapered portion 60A-1 allows both to mask the diodes for a person looking towards the translucent panel 70 and to guide the light emitted by the diodes to the length zone L3 of the translucent panel 70 arranged at the right of the wall. 60 A-1 guide, which advantageously allows to have a large luminous surface at the translucent panel 70.
La portion biseautée 60A-1 définit avec la paroi latérale 60A un logement 62 de réception de moyens de fixations des profilés 60 entre eux. A titre d'exemple, ces moyens de fixation peuvent comprendre des équerres vissées sur les profilés 60 au niveau des logements de réception 62. The bevelled portion 60A-1 defines with the side wall 60A a housing 62 for receiving fastening means of the profiles 60 between them. By way of example, these fixing means may comprise brackets screwed onto the profiles 60 at the level of the receiving housings 62.
Enfin, dans cet exemple, la paroi latérale 60A définit un espace 63 de réception d'une vis 110 de fixation du panneau d'obturation 100 sur le cadre 50. Il va de soi que cet espace de réception 63 et cette fixation par vis 110 ne sont en rien limitatifs de la portée de la présente invention, le panneau d'obturation 100 pouvant être fixé sur le cadre 50 par tout moyen adapté. Finally, in this example, the side wall 60A defines a space 63 for receiving a screw 110 for fastening the shutter panel 100 to the frame 50. It goes without saying that this receiving space 63 and this fixing by screws 110 are in no way limiting the scope of the present invention, the shutter panel 100 can be fixed on the frame 50 by any suitable means.
Dans une forme de réalisation, la dalle d'éclairage 40 selon l'invention peut en outre comprendre une plaque ou un film décoratif (non représenté) réalisé en un matériau plastique, fixé sur le panneau translucide 70 du côté de l'espace intérieur I T et illustrant une image lumineuse lorsque la dalle 40 est en fonctionnement, i.e. lorsque les diodes 80 sont alimentées électriquement pour éclairer. In one embodiment, the lighting slab 40 according to the invention may further comprise a decorative plate or film (not shown) made of a plastic material, fixed on the translucent panel 70 on the IT interior space side. and illustrating a bright image when the slab 40 is in operation, ie when the diodes 80 are electrically powered to illuminate.
Mise en œuvre de l'invention L'invention va maintenant être décrite dans sa mise en œuvre en référence à la figure 5. Implementation of the invention The invention will now be described in its implementation with reference to FIG.
Lorsque la dalle 40 est montée dans un faux-plafond et qu'elle est alimentée électriquement, les diodes de la bande de diodes électroluminescentes d'éclairage 80 émettent de la lumière à travers la plaque luminescente 90, le panneau d'obturation 100 du cadre 50 empêchant cette lumière de quitter la dalle 40 par la face opaque FO. When the slab 40 is mounted in a false ceiling and is electrically powered, the LEDs of the light-emitting diode band 80 emit light through the luminescent plate 90, the shutter panel 100 of the frame 50 preventing this light from leaving the slab 40 by the opaque face FO.
Une première fraction Fl de cette lumière émise en direction de la face supérieure 91 traitée de la plaque luminescente 90 et vers le film réflecteur 95 se réfléchit obliquement dans la plaque luminescente 90 tandis qu'une deuxième fraction F2 de cette lumière se réfléchit sensiblement orthogonalement à la face supérieur 91 de la plaque luminescente 90 en direction du panneau translucide 70 grâce au traitement réalisé sur la face supérieure 91 de la plaque luminescente 90. A first fraction F1 of this light emitted in the direction of the upper face 91 treated of the luminescent plate 90 and towards the reflective film 95 is reflected obliquely in the luminescent plate 90 while a second fraction F2 of this light is reflected substantially orthogonally to the upper face 91 of the light-emitting plate 90 towards the translucent panel 70 thanks to the treatment performed on the upper face 91 of the light-emitting plate 90.
Une troisième fraction F3 de lumière, émise en direction des parois de guidage 60A-11 des profilés 60 traverse l'espace intérieur INT de la dalle 40 puis atteint les parois de guidage 60 A- 11 des profilés 60 sur lesquelles elle se réfléchit en direction du panneau translucide 70 qu'elle traverse alors au niveau de la zone périphérique de largeur L3 du panneau translucide 70 située au droit desdites parois de guidage 60A-11, permettant ainsi une diffusion de la lumière sur une surface importante du panneau translucide 70, notamment au niveau de ses bords. A third fraction F3 of light, emitted in the direction of the guide walls 60A-11 of the profiles 60 passes through the internal space INT of the slab 40 and reaches the guide walls 60 A-11 of the profiles 60 on which it is reflected in the direction of the translucent panel 70 that it then passes at the level of the peripheral zone of width L3 of the translucent panel 70 located at right of said guide walls 60A-11, thus allowing light to diffuse over a large surface of the translucent panel 70, in particular at its edges.
Les parois de guidage 60A-11 permettent d'utiliser des parois de support 60B de faible largeur qui permettent avantageusement de diffuser la lumière sur une surface importante du panneau translucide 70 de la dalle 40. The guide walls 60A-11 make it possible to use support walls 60B of small width which advantageously make it possible to diffuse the light over a large surface of the translucent panel 70 of the slab 40.
L'invention est particulièrement avantageuse lorsqu'une pluralité de dalles d'éclairage 40 sont montées dans un faux-plafond et comprennent chacune une plaque ou un film décoratif permettant de constituer un plafond décoré car, dans ce cas, la faible épaisseur des parois de support 60B permet de visualiser une quantité importante dudit plafond décoré. Il est à noter enfin que la présente invention n'est pas limitée aux exemples décrits ci- dessus et est susceptible de nombreuses variantes accessibles à l'homme de l'art. Notamment, les dimensions, les formes et l'agencement des différents éléments de la dalle d'éclairage tels que représentés sur les figures de façon à illustrer un exemple de réalisation de l'invention, ne sauraient être interprétés comme limitatifs. The invention is particularly advantageous when a plurality of lighting slabs 40 are mounted in a false ceiling and each comprise a plate or a decorative film for constituting a decorated ceiling because, in this case, the small thickness of the walls of support 60B makes it possible to display a large quantity of said decorated ceiling. Finally, it should be noted that the present invention is not limited to the examples described above and is capable of numerous variants accessible to those skilled in the art. In particular, the dimensions, shapes and arrangement of the various elements of the lighting slab as shown in the figures so as to illustrate an exemplary embodiment of the invention, can not be interpreted as limiting.

Claims

REVENDICATIONS
1. Dalle d'éclairage (40) à diodes électroluminescentes pour faux-plafond, ladite dalle d'éclairage (40) comprenant : A light-emitting diode (40) for a false ceiling, said illumination tile (40) comprising:
- un panneau translucide (70) de diffusion de la lumière, a translucent panel (70) for diffusing light,
- un cadre (50) de forme carrée comprenant quatre profilés (60) formant chacun un côté dudit cadre (50), chaque profilé (60) comprenant une paroi latérale (60A) et une paroi de support (60B) du panneau translucide (70) de diffusion de la lumière,  a square frame (50) comprising four profiles (60) each forming one side of said frame (50), each profile (60) comprising a side wall (60A) and a support wall (60B) of the translucent panel (70); ) light scattering,
- au moins une bande de diodes électroluminescentes d'éclairage (80) montée sur les parois latérales (60A) des profilés (60) du cadre (50),  at least one strip of light-emitting diodes (80) mounted on the side walls (60A) of the profiles (60) of the frame (50),
- une plaque luminescente (90) de réflexion de la lumière émise par les diodes électroluminescentes d'éclairage, et  a luminescent plate (90) for reflecting the light emitted by the light-emitting diodes for lighting, and
- un panneau d'obturation (100) du cadre (50),  a shutter panel (100) of the frame (50),
la dalle d'éclairage (40) étant caractérisée en ce que la paroi latérale (60A) de chaque profilé (60) du cadre (50) comprend, entre la bande de diodes électroluminescentes d'éclairage (80) et le panneau translucide (70) de diffusion de la lumière, des moyens de guidage (60A-1) de la lumière s'étendant depuis ladite paroi latérale (60A) en regard du panneau translucide (70) de diffusion de la lumière de manière à guider la lumière émise par les diodes vers le panneau translucide (70) de diffusion de la lumière. the lighting slab (40) being characterized in that the side wall (60A) of each channel (60) of the frame (50) comprises between the light emitting diode strip (80) and the translucent panel (70). ) light diffusion means, light guide means (60A-1) extending from said side wall (60A) facing the translucent light scattering panel (70) to guide the light emitted by the diodes to the translucent translucent panel (70).
2. Dalle d'éclairage (40) selon la revendication 1, caractérisée en ce que les moyens de guidage de la lumière sont issus de matière de la paroi latérale (60A) de chaque profilé (60) du cadre (50). 2. lighting tile (40) according to claim 1, characterized in that the light guiding means are derived from material of the side wall (60A) of each section (60) of the frame (50).
3. Dalle d'éclairage (40) selon l'une des revendications 1 et 2, caractérisée en ce que la paroi de support (60B) est issue de matière de la paroi latérale (60A) et s'étend perpendiculairement depuis ladite paroi latérale (60A) en définissant une extrémité libre. 3. Lighting tile (40) according to one of claims 1 and 2, characterized in that the support wall (60B) is derived from material of the side wall (60A) and extends perpendicularly from said side wall (60A) by defining a free end.
4. Dalle d'éclairage (40) selon l'une des revendications 1 à 3, caractérisée en ce que la largeur (L2) de la paroi de support (60B) est inférieure à 15 mm. 4. Lighting tile (40) according to one of claims 1 to 3, characterized in that the width (L2) of the support wall (60B) is less than 15 mm.
5. Dalle d'éclairage (40) selon l'une des revendications 1 à 4, caractérisée en ce que les moyens de guidage de la lumière comprennent une portion biseautée (60A-1) s'étendant en saillie en regard du panneau translucide (70) de diffusion de la lumière. 5. Lighting tile (40) according to one of claims 1 to 4, characterized in that the light guiding means comprise a bevelled portion (60A-1) projecting from the translucent panel ( 70) of light scattering.
6. Dalle d'éclairage (40) selon la revendication 5, caractérisée en ce que la portion biseautée (60A-1) comprend une paroi de guidage (60A-11) de la lumière, plane, définissant un angle (a) compris entre 30° et 60° avec le panneau translucide (70) de diffusion de la lumière. 6. Lighting tile (40) according to claim 5, characterized in that the bevelled portion (60A-1) comprises a guide wall (60A-11) of the light, plane, defining an angle (a) between 30 ° and 60 ° with the translucent panel (70) of light scattering.
7. Dalle d'éclairage (40) selon la revendication 6, caractérisée en ce que la paroi de guidage (60A-11) définit un angle (a) compris entre 40° et 55° avec le panneau translucide (70) de diffusion de la lumière. Illuminating slab (40) according to Claim 6, characterized in that the guide wall (60A-11) defines an angle (a) of between 40 ° and 55 ° with the translucent translucent panel (70). the light.
8. Dalle d'éclairage (40) selon la revendication 7, caractérisée en ce que la paroi de guidage (60A-11) définit un angle (a) de l'ordre de 50° avec le panneau translucide (70) de diffusion de la lumière. 8. Lighting slab (40) according to claim 7, characterized in that the guide wall (60A-11) defines an angle (a) of the order of 50 ° with the translucent panel (70) of diffusion of the light.
9. Dalle d'éclairage (40) selon l'une des revendications 5 à 8, caractérisée en ce que les moyens de guidage de la lumière comprennent une portion de liaison (60A-2) s'étendant perpendiculairement depuis la paroi latérale (60A) de chaque profilé (60) du cadre (50), parallèlement à la paroi de support (60B) dudit profilé (60), de manière à former une rainure (61) de réception du panneau translucide (70) de diffusion de la lumière, la portion biseautée (60A-1) s'étendant depuis ladite portion de liaison (60A-2). 9. Lighting tile (40) according to one of claims 5 to 8, characterized in that the light guiding means comprise a connecting portion (60A-2) extending perpendicularly from the side wall (60A ) of each profile (60) of the frame (50), parallel to the support wall (60B) of said profile (60), so as to form a groove (61) for receiving the translucent light diffusion panel (70) the bevelled portion (60A-1) extending from said connecting portion (60A-2).
10. Dalle d'éclairage (40) selon l'une des revendications 5 à 9, caractérisée en ce que la portion biseautée (60A-1) comprend une portion de support (60A-12) de la plaque luminescente (90). 10. Lighting tile (40) according to one of claims 5 to 9, characterized in that the beveled portion (60A-1) comprises a support portion (60A-12) of the luminescent plate (90).
11. Dalle d'éclairage (40) selon la revendication 10, caractérisée en ce que la portion de support (60A-12) peut en outre supporter au moins en partie la bande de diodes électroluminescentes d'éclairage (80). 11. Lighting tile (40) according to claim 10, characterized in that the support portion (60A-12) can further support at least in part the light-emitting diode strip (80).
12. Dalle d'éclairage (40) selon l'une des revendications 5 à 11, caractérisée en ce que la portion biseautée (60A-1) définit avec la paroi latérale (60A) un logement (62) de réception de moyens de fixations des profilés (60) entre eux. 12. Lighting tile (40) according to one of claims 5 to 11, characterized in that the beveled portion (60A-1) defines with the side wall (60A) a housing (62) for receiving fixing means profiles (60) between them.
13. Dalle d'éclairage (40) selon l'une des revendications 1 à 12, caractérisée en ce qu'elle comprend en outre, entre le panneau translucide (70) de diffusion de la lumière et la plaque luminescente de réflexion (90), une plaque décorative ou un film décoratif réalisé en un matériau plastique translucide et illustrant une image. 13. Lighting tile (40) according to one of claims 1 to 12, characterized in that it further comprises, between the translucent panel (70) of light diffusion and the reflective luminescence plate (90), a decorative plate or a decorative film made of a translucent plastic material and illustrating an image.
14. Faux-plafond (1) d'un immeuble comprenant une structure comportant une pluralité de poutrelles disposées selon un quadrillage horizontal et sur certaines desquelles est montée au moins une dalle d'éclairage (40) selon l'une des revendications l à 13. 14. False ceiling (1) of a building comprising a structure comprising a plurality of beams arranged in a horizontal grid and on which is mounted at least one lighting slab (40) according to one of claims 1 to 13 .
15. Faux-plafond (1) selon la revendication 14, caractérisé en ce qu'il comprend une pluralité de dalles d'éclairage (40) selon la revendication 13 disposée de manière à former un plafond décoré. Ceiling suspended ceiling (1) according to claim 14, characterized in that it comprises a plurality of lighting slabs (40) according to claim 13 arranged to form a decorated ceiling.
PCT/EP2016/057446 2015-04-10 2016-04-05 Lighting panel for suspended ceiling WO2016162339A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1553130 2015-04-10
FR1553130A FR3034839B1 (en) 2015-04-10 2015-04-10 LIGHTING SLAB FOR FALSE CEILING

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Citations (7)

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Publication number Priority date Publication date Assignee Title
WO2006061709A1 (en) * 2004-12-10 2006-06-15 Giancarlo Miani Walk-on back-lit tile for tiling floors and walls in general
US20100126090A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Specialty ceiling structure and functional ceiling grid
WO2011004984A2 (en) * 2009-07-08 2011-01-13 (주)테크자인라이트패널 Flat illumination device
US20130322069A1 (en) * 2012-06-04 2013-12-05 Enlight Corporation Lamp structure
EP2722454A1 (en) * 2012-10-16 2014-04-23 Newtec Deko GmbH Luminous ceiling
EP2765354A1 (en) * 2013-02-06 2014-08-13 Hartmut S. Engel Luminaire with light conducting disc
US20140362602A1 (en) * 2013-06-07 2014-12-11 William Hofman Panel light assembly

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006061709A1 (en) * 2004-12-10 2006-06-15 Giancarlo Miani Walk-on back-lit tile for tiling floors and walls in general
US20100126090A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Specialty ceiling structure and functional ceiling grid
WO2011004984A2 (en) * 2009-07-08 2011-01-13 (주)테크자인라이트패널 Flat illumination device
US20130322069A1 (en) * 2012-06-04 2013-12-05 Enlight Corporation Lamp structure
EP2722454A1 (en) * 2012-10-16 2014-04-23 Newtec Deko GmbH Luminous ceiling
EP2765354A1 (en) * 2013-02-06 2014-08-13 Hartmut S. Engel Luminaire with light conducting disc
US20140362602A1 (en) * 2013-06-07 2014-12-11 William Hofman Panel light assembly

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FR3034839A1 (en) 2016-10-14

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