WO1997017689A1 - Luminescent panel - Google Patents

Luminescent panel Download PDF

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Publication number
WO1997017689A1
WO1997017689A1 PCT/FR1996/001747 FR9601747W WO9717689A1 WO 1997017689 A1 WO1997017689 A1 WO 1997017689A1 FR 9601747 W FR9601747 W FR 9601747W WO 9717689 A1 WO9717689 A1 WO 9717689A1
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WO
WIPO (PCT)
Prior art keywords
plate
panel
light
diodes
returns
Prior art date
Application number
PCT/FR1996/001747
Other languages
French (fr)
Inventor
Christian Piras
Original Assignee
Epsilon
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 Epsilon filed Critical Epsilon
Publication of WO1997017689A1 publication Critical patent/WO1997017689A1/en

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Classifications

    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0066—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 planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources

Definitions

  • the invention relates to a luminescent panel.
  • It relates more particularly, consisting of a translucent plastic plate, such that, in polymethyl methacrylate. comprising on one of its large faces a motif, decorative or advertising, and of a light source diffusing through one of the edges of the plate a light beam whose rays, reflected by the faces of this plate, ensure the illumination of the aforementioned motif.
  • the pattern is engraved on the back of the plate which gives it a three-dimensional appearance.
  • This engraving operation requires appropriate and expensive means and requires time, which leads to a fairly high cost price.
  • the engraving limits the decorative possibilities, in particular in the choice of shapes, letters, signs and figures, and requires, in order to obtain polychrome effects, to have recourse to an additional painting operation.
  • the light emitted is polychromatic and provides an illumination whose intensity is different depending on the colors used to color the engraved areas.
  • certain panels and for example those described in EP-A-306,659 and EP-A-403,764, use light-emitting diodes as light source which, in a housing, are fixed one after the other on a support disposed in the vicinity of an edge of the screen, these diodes being engaged in cavities formed in the screen to EP-a-306 659 or in an element astride the screen to EP-a-403 764.
  • the lighting mode allows complete freedom to the creator who can thus produce panels of various lengths, without the light source is a constraint since it can play on the number of LEDs and their spacing.
  • the object of the present invention is to provide a luminescent panel which. inexpensive to make, leaving all creative freedom to the designer and can be reused, optimizes the lighting of the motif and provides better illumination of this motif.
  • the diodes constituting the light source each provide a light intensity of between 0.5 and 1 Candela and a light brush flaring over an angle of between 60 and 80 °. each diode producing a monochromatic light whose wavelength is close to the colorimetric wavelength of the elements of the pattern, and being arranged near the corresponding edge but without contact with it.
  • the large aperture of the light beam associated with the proximity of the diode and the edge allows the light rays emitted to illuminate, from their departure, the large faces of the panel, which has the effect of increasing the height of the panel on which the rays are reflected between its front and rear faces and, in combination with the lighting power of the diodes and their wavelength close to the color of the pattern, improve the visual perception of this decorative pattern, without that it is necessary to increase the electrical consumption.
  • the diodes are fixed to the wafer of a printed circuit placed on the two interior returns of a metal profile, having a section in an "U" shape turned over, the wings of which are provided with means of fixing on the panel.
  • the distance between the diodes and the edge of the panel is constant and the structure, carrying light, forms a relatively small unit.
  • the sheet from which the decorative elements are cut is a polyvinyl chloride sheet coated on one side. '' an acrylic adhesive whose indices, respectively, of reflection and refraction, are close to those of the plate. Thanks to this choice of glue, with equal light output, the decorative elements are more visible and sharper.
  • Figure 1 is a front view, in elevation with partial section, of a light panel according to the invention.
  • Figure 2 is a partial cross-sectional view along 2.2 of Figure 1.
  • Figure 3 is a partial sectional view showing on a very enlarged scale the rear part of the panel.
  • the reference numeral 2 designates a plate made of synthetic material and in particular of polymethyl-methalycrate, constituting the essential element of the luminescent panel.
  • This plate carries, on its rear face 2a, a decorative pattern generally designated by 3, and constituted here by two letters 3a and a number 3b.
  • the elements 3 a and 3 b of the pattern 3 are produced by cutting from a flexible polyvinyl chloride sheet, coated with a layer of permanent adhesive and, in particular, with a layer of acrylic adhesive.
  • the cutting is done from the back of the tablecloth with the layer 5 of glue and not from its front as is usually the case.
  • the adhesive has reflection and refraction indices close to those of the plate material.
  • the elements 3a, 3b are positioned and fixed by bonding against the rear face 2a of the plate 2. Bonding is carried out taking care not to trap air.
  • the luminescent panel is also provided with several light sources 6 which are constituted by diodes each providing a light intensity of between 0.5 and 1 Candela and each delivering a light brush flaring at an angle a of between 60 and 80 °.
  • the light emitted by the diodes is chosen in a range of wavelengths between 560 and 680 nanometers, that is to say going from yellow to red through all the nuances , including orange.
  • the emission wavelengths of the diodes of the same panel are chosen in relation to the wavelength of the color of the elements 3 a, 3 b to be illuminated and so as to be close to it, for get the best lighting performance.
  • a yield of 1 '' from 70 to 80% is obtained with a panel according to the invention comprising:
  • - a pattern formed by elements glued by an acrylic adhesive having indices of reflection and refraction close to those of the material of the plate, - a light source composed of a plurality of diodes emitting, by a wide beam, a monochromatic light of high intensity and wavelength close to that of the color of the elements of the pattern.
  • diodes emitting red or yellow light can be used to illuminate elements 3a. 3b of yellow or red color, since the wavelengths are not far apart.
  • the same diodes can also cooperate with elements of 3a, 3b. white in color but with reduced yield.
  • the use of the same diodes, emitting a warm color with elements 3a, 3b, having a cold color leads to low efficiency and poor lighting of the pattern.
  • Each of these diodes is fixed to the wafer 7 of a printed circuit connected, by an electrical circuit 8, to a supply terminal 9.
  • the wafer 7 is fixed to two of the internal returns 10 d 'a metal profile 12 having in cross section the general shape of an inverted "U".
  • Each of the wings of this profile has, in addition to the returns 10, extreme returns 13.
  • the latter form ribs which provide support for the plate 2 by cooperating with grooves 11 formed in this plate 2, near its upper edge .
  • the distance S between each diode 6 and the upper edge 2s of the panel 2 is constant over the entire length of the panel.
  • the value of this distance S is between 0.1 and 1 mm and, in practice, each diode is almost in contact with the edge 2s, but without touching it, so as to benefit as much as possible. of the wide angle a of its light beam.
  • terminal 9 is connected by an electrical circuit 14 to a step-down transformer 15, itself connected to the network.
  • This transformer delivers a low voltage current of 12 volts.
  • the light sources 6 When the light sources 6 are supplied, the light beams which they emit are reflected against the large faces, respectively front 2b and rear 2a of the plate 2, but also by the lateral and lower edges which are each covered by a film 16 s opposing the diffusion of rays.
  • the light rays cooperate with the layer of adhesive 5 to ensure the illumination of the face of the element 3a 3b facing forward, that is to say towards the observer's eye 17.
  • the elements of pattern 3 are brightly illuminated, which makes them perfectly perceptible.
  • the plate can be recovered and reused since, after removing the elements 3a and 3b and cleaning the adhesive particles with alcohol, the face 2a having received these elements has no deterioration and can be immediately reused .
  • the wings of the profile 12 do not have returns 13 and are fixed to the panel by screws or by gluing.
  • the decorative patterns which are described above as being glued to the rear face 2a can also be produced by screen printing on this rear face. It appears from the above description that the panel according to the invention simplifies the work of the editor, optimizes the lighting of the pattern, removes the current constructive limits and can be reused.
  • the panel is insensitive to humidity and can be used in very humid atmospheres, inside and outside .

Abstract

A panel consisting of a translucent plate (2) made of synthetic material and provided on the back with a decorative or promotional design, and at least one light source (6) illuminating the design through one of the edges of the plate. The diodes of the light source (6) each have a light strength of 0.5-1 candela and produce a light beam spread over an angle of 60-80°. Each diode produces monochromatic light having a wavelength close to the colorimetric wavelength of the elements (3a, 3b) of the design (3) and is adjacent to but not in contact with the corresponding plate edge.

Description

"Panneau luminescent". "Luminescent panel".
L'invention est relative à un panneau luminescent.The invention relates to a luminescent panel.
Elle conceme plus particulièrement ceux, composés d'une plaque translucide en matière synthétique, tel qu'en polyméthyl-métacrylate. comportant sur l'une des ses grandes faces un motif, décoratif ou publicitaire, et d'une source lumineuse diffusant à travers l'un des chants de la plaque un faisceau lumineux dont les rayons, réfléchis par les faces de cette plaque, assurent l'illumination du motif précité.It relates more particularly, consisting of a translucent plastic plate, such that, in polymethyl methacrylate. comprising on one of its large faces a motif, decorative or advertising, and of a light source diffusing through one of the edges of the plate a light beam whose rays, reflected by the faces of this plate, ensure the illumination of the aforementioned motif.
Traditionnellement, le motif est gravé dans la face arrière de la plaque ce qui lui donne un aspect tridimensionnel. Cette opération de gravage nécessite des moyens appropriés et onéreux et exige du temps, ce qui conduit à un prix de revient assez élevé. Par ailleurs, le gravage limite les possibilités décoratives, en particulier dans le choix des formes, des lettres, signes et figures, et nécessite, pour l'obtention d'effets polychromes, d'avoir recours à une opération supplémentaire de peinture.Traditionally, the pattern is engraved on the back of the plate which gives it a three-dimensional appearance. This engraving operation requires appropriate and expensive means and requires time, which leads to a fairly high cost price. Furthermore, the engraving limits the decorative possibilities, in particular in the choice of shapes, letters, signs and figures, and requires, in order to obtain polychrome effects, to have recourse to an additional painting operation.
Un autre inconvénient des panneaux actuels est qu'en raison de l'utilisation de tube au néon pour constituer la source lumineuse, comme décrit dans DE-U-Another disadvantage of current panels is that due to the use of neon tube to constitute the light source, as described in DE-U-
9217383 et FR-A-2 659 776, ils ont une longueur limitée à celle du plus grand tube. Par ailleurs, la lumière émise est polychromatique et procure une illumination dont l'intensité est différente selon les couleurs utilisée pour colorer les zones gravées.9217383 and FR-A-2 659 776, they have a length limited to that of the largest tube. Furthermore, the light emitted is polychromatic and provides an illumination whose intensity is different depending on the colors used to color the engraved areas.
Pour remédier à cela, certains panneaux, et par exemple, ceux décrits dans EP-A-306 659 et EP-A-403 764, utilisent comme source lumineuse des diodes luminescentes qui, dans un boîtier, sont fixés les unes après les autres sur un support disposé à proximité d'un chant de l'écran, ces diodes étant engagées dans des cavités réalisées dans l'écran pour EP-A-306 659. ou dans un élément enfourchant l'écran pour EP-A-403 764. Ce mode d'éclairage laisse toute liberté au créateur qui peut ainsi réaliser des panneaux de longueurs diverses, sans que la source lumineuse soit une contrainte puisqu'il peut jouer sur le nombre des diodes et sur leur espacement.To remedy this, certain panels, and for example those described in EP-A-306,659 and EP-A-403,764, use light-emitting diodes as light source which, in a housing, are fixed one after the other on a support disposed in the vicinity of an edge of the screen, these diodes being engaged in cavities formed in the screen to EP-a-306 659 or in an element astride the screen to EP-a-403 764. the lighting mode allows complete freedom to the creator who can thus produce panels of various lengths, without the light source is a constraint since it can play on the number of LEDs and their spacing.
Toutefois, il s'avère que, lorsque de tels panneaux sont utilisés avec des motifs décoratifs formés par des éléments en matière synthétique découpés et collés sur l'une des faces du panneau, comme décrit dans ces deux derniers documents. l'éclairement est insuffisant et conduit à une faible perception visuelle du motif décoratif, ce qui limite l'application de ce type de panneau.However, it turns out that, when such panels are used with decorative patterns formed by plastic elements cut out and pasted on one side of the panel, as described in these two documents. the illumination is inadequate and leads to poor visual perception of the decorative pattern, which limits the application of this type of panel.
La présente invention a pour objet de foumir un panneau luminescent qui. peu onéreux à réaliser, laissant toute liberté créative au concepteur et pouvant être réutilisé, optimise l'éclairement du motif et procure une meilleure illumination de ce motif. A cet effet, dans le panneau selon l'invention, les diodes constituant la source lumineuse fournissent chacune une intensité lumineuse comprise entre 0,5 et 1 Candela et un pinceau lumineux s'évasant sur un angle compris entre 60 et 80°. chaque diode produisant une lumière monochromatique dont la longueur d'onde est voisine de la longueur d'onde colorimétrique des éléments du motif, et étant disposée à proximité du chant correspondant mais sans contact avec lui.The object of the present invention is to provide a luminescent panel which. inexpensive to make, leaving all creative freedom to the designer and can be reused, optimizes the lighting of the motif and provides better illumination of this motif. To this end, in the panel according to the invention, the diodes constituting the light source each provide a light intensity of between 0.5 and 1 Candela and a light brush flaring over an angle of between 60 and 80 °. each diode producing a monochromatic light whose wavelength is close to the colorimetric wavelength of the elements of the pattern, and being arranged near the corresponding edge but without contact with it.
La grande ouverture du faisceau lumineux associé à la proximité de la diode et du chant, permet aux rayons lumineux émis d'illuminer, dès leur départ, les grandes faces du panneau, ce qui a pour effet d'augmenter la hauteur du panneau sur laquelle s'effectue la réflexion des rayons entre ses faces avant et arrière et, en combinaison avec la puissance d'éclairage des diodes et leur longueur d'onde voisine de la couleur du motif, d'améliorer la perception visuelle de ce motif décoratif, sans qu'il soit nécessaire d'augmenter la consommation électrique.The large aperture of the light beam associated with the proximity of the diode and the edge, allows the light rays emitted to illuminate, from their departure, the large faces of the panel, which has the effect of increasing the height of the panel on which the rays are reflected between its front and rear faces and, in combination with the lighting power of the diodes and their wavelength close to the color of the pattern, improve the visual perception of this decorative pattern, without that it is necessary to increase the electrical consumption.
Dans une forme d'exécution de l'invention, les diodes sont fixées sur la plaquette d'un circuit imprimé posé sur les deux retours intérieurs d'un profilé métallique, ayant une section en "U" retourné dont les ailes sont munies de moyens de fixation sur le panneau.In one embodiment of the invention, the diodes are fixed to the wafer of a printed circuit placed on the two interior returns of a metal profile, having a section in an "U" shape turned over, the wings of which are provided with means of fixing on the panel.
Ainsi, la distance entre les diodes et le chant du panneau est constante et la structure, porteuse d'éclairage, forme un ensemble peu volumineux. Avantageusement, et lorsque les motifs décoratifs sont découpés dans une nappe en matière synthétique adhesive et sont collés contre l'une des faces du panneau, la nappe dans laquelle les éléments décoratifs sont découpés, est une nappe en polychlorure de vinyle enduite sur une face d'une colle acrylique dont les indices, respectivement, de réflexion et de réfraction, sont proches de ceux de la plaque. Grâce à ce choix de colle, à puissance lumineuse égale, les éléments décoratifs sont plus visibles et plus nets.Thus, the distance between the diodes and the edge of the panel is constant and the structure, carrying light, forms a relatively small unit. Advantageously, and when the decorative patterns are cut from a sheet of adhesive synthetic material and are glued against one of the faces of the panel, the sheet from which the decorative elements are cut is a polyvinyl chloride sheet coated on one side. '' an acrylic adhesive whose indices, respectively, of reflection and refraction, are close to those of the plate. Thanks to this choice of glue, with equal light output, the decorative elements are more visible and sharper.
D'autres caractéristiques et avantages ressortiront de la description qui suit en référence au dessin schématique annexé représentant à titre d'exemple une forme de réalisation de ce panneau. Figure 1 est une vue de face, en élévation avec coupe partielle, d'un panneau lumineux selon l'invention.Other characteristics and advantages will emerge from the description which follows with reference to the appended schematic drawing showing by way of example an embodiment of this panel. Figure 1 is a front view, in elevation with partial section, of a light panel according to the invention.
Figure 2 est une vue partielle en coupe transversale suivant 2.2 de figure 1.Figure 2 is a partial cross-sectional view along 2.2 of Figure 1.
Figure 3 est une vue partielle en coupe montrant à l'échelle très agrandie la partie arrière du panneau. Dans ce dessin, la référence numérique 2 désigne une plaque en matière synthétique et notamment en polyméthyle-méthalycrate, constituant l'élément essentiel du panneau luminescent. Cette plaque porte, sur sa face arrière 2a, un motif décoratif désigné de façon générale par 3, et constitué ici par deux lettres 3a et un chiffre 3b.Figure 3 is a partial sectional view showing on a very enlarged scale the rear part of the panel. In this drawing, the reference numeral 2 designates a plate made of synthetic material and in particular of polymethyl-methalycrate, constituting the essential element of the luminescent panel. This plate carries, on its rear face 2a, a decorative pattern generally designated by 3, and constituted here by two letters 3a and a number 3b.
Les éléments 3 a et 3 b du motif 3 sont réalisés par découpage dans une nappe souple en polychlorure de vinyle, enduite d'une couche d'adhésif permanent et, en particulier, d'une couche de colle acrylique. Le découpage s'effectue à partir du verso de la nappe dotée de la couche 5 de colle et non à partir de son recto comme c'est habituellement l'usage. La colle présente des indices de réflexion et de réfraction proches de ceux du matériau de la plaque.The elements 3 a and 3 b of the pattern 3 are produced by cutting from a flexible polyvinyl chloride sheet, coated with a layer of permanent adhesive and, in particular, with a layer of acrylic adhesive. The cutting is done from the back of the tablecloth with the layer 5 of glue and not from its front as is usually the case. The adhesive has reflection and refraction indices close to those of the plate material.
Après découpage, les éléments 3a, 3b sont positionnés et fixés par collage contre la face postérieure 2a de la plaque 2. Le collage est réalisé en prenant soin de ne pas emprisonner de l'air.After cutting, the elements 3a, 3b are positioned and fixed by bonding against the rear face 2a of the plate 2. Bonding is carried out taking care not to trap air.
Le panneau luminescent est également muni de plusieurs sources lumineuses 6 qui sont constituées par des diodes fournissant chacune une intensité lumineuse comprise entre 0,5 et 1 Candela et délivrant chacune un pinceau lumineux s'évasant suivant un angle a compris entre 60 et 80°.The luminescent panel is also provided with several light sources 6 which are constituted by diodes each providing a light intensity of between 0.5 and 1 Candela and each delivering a light brush flaring at an angle a of between 60 and 80 °.
La lumière émise par les diodes, et qui est d'origine monochromatique, est choisie dans une gamme de longueurs d'onde comprises entre 560 et 680 nanomètres, c'est-à-dire allant du jaune au rouge en passant par toutes les nuances, y compris l'orange. Les longueurs d'onde d'émission des diodes d'un même panneau sont choisies en rapport avec la longueur d'onde de la couleur des éléments 3 a, 3 b devant être illuminés et de manière à être proche de celle-ci, pour obtenir le meilleur rendement d'éclairement.The light emitted by the diodes, and which is of monochromatic origin, is chosen in a range of wavelengths between 560 and 680 nanometers, that is to say going from yellow to red through all the nuances , including orange. The emission wavelengths of the diodes of the same panel are chosen in relation to the wavelength of the color of the elements 3 a, 3 b to be illuminated and so as to be close to it, for get the best lighting performance.
Il est précisé que par rapport à un panneau classique utilisant un tube au néon produisant une lumière polychromatique et comportant des motifs gravés et peints, où le rendement d'éclairement du motif est de l'ordre de 15 à 20 %, un rendement de l'ordre de 70 à 80 % est obtenu avec un panneau selon l'invention comportant :It is specified that compared to a conventional panel using a neon tube producing a polychromatic light and comprising engraved and painted patterns, where the lighting efficiency of the pattern is of the order of 15 to 20%, a yield of 1 '' from 70 to 80% is obtained with a panel according to the invention comprising:
- un motif formé par des éléments collés par une colle acrylique ayant des indices de réflexion et de réfraction proche de ceux du matériau de la plaque, - une source lumineuse composée d'une pluralité de diodes émettant, par un faisceau large, une lumière monochromatique de forte intensité et de longueur d'onde voisine de celle de la couleur des éléments du motif.- a pattern formed by elements glued by an acrylic adhesive having indices of reflection and refraction close to those of the material of the plate, - a light source composed of a plurality of diodes emitting, by a wide beam, a monochromatic light of high intensity and wavelength close to that of the color of the elements of the pattern.
Bien que le rendement soit un peu plus faible, des diodes émettant une lumière rouge ou jaune peuvent être utilisées pour illuminer des éléments 3a. 3b de couleur jaune ou rouge, puisque les longueurs d'onde sont peu éloignées. Les mêmes diodes peuvent aussi coopérer avec des éléments de 3a, 3b. de couleur blanche, mais avec un rendement réduit. Par contre, l'utilisation des mêmes diodes, émettant une couleur chaude avec des éléments 3a, 3b, ayant une couleur froide, conduit à un faible rendement et à un mauvais éclairement du motif.Although the efficiency is slightly lower, diodes emitting red or yellow light can be used to illuminate elements 3a. 3b of yellow or red color, since the wavelengths are not far apart. The same diodes can also cooperate with elements of 3a, 3b. white in color but with reduced yield. On the other hand, the use of the same diodes, emitting a warm color with elements 3a, 3b, having a cold color, leads to low efficiency and poor lighting of the pattern.
Chacune de ces diodes est fixée sur la plaquette 7 d'un circuit imprimé raccordé, par un circuit électrique 8, à une borne d'alimentation 9. Dans la forme d'exécution représentée la plaquette 7 est fixée sur deux des retours internes 10 d'un profilé métallique 12 ayant en section transversale la forme générale d'un "U" retourné. Chacune des ailes de ce profilé comporte, en complément des retours 10, des retours extrêmes 13. Ces derniers forment des nervures qui assurent le soutien de la plaque 2 en coopérant avec des rainures 11 ménagées dans cette plaque 2, à proximité de son chant supérieur.Each of these diodes is fixed to the wafer 7 of a printed circuit connected, by an electrical circuit 8, to a supply terminal 9. In the embodiment shown the wafer 7 is fixed to two of the internal returns 10 d 'a metal profile 12 having in cross section the general shape of an inverted "U". Each of the wings of this profile has, in addition to the returns 10, extreme returns 13. The latter form ribs which provide support for the plate 2 by cooperating with grooves 11 formed in this plate 2, near its upper edge .
En raison de ce mode de fixation, la distance S entre chaque diode 6 et le chant supérieur 2s du panneau 2 est constante sur toute la longueur du panneau. Selon l'épaisseur de la plaque 2, la valeur de cette distance S est comprise entre 0,1 et 1 mm et, en pratique, chaque diode est presque au contact du chant 2s, mais sans le toucher, de manière à bénéficier au maximum du grand angle a de son faisceau lumineux.Because of this method of attachment, the distance S between each diode 6 and the upper edge 2s of the panel 2 is constant over the entire length of the panel. Depending on the thickness of the plate 2, the value of this distance S is between 0.1 and 1 mm and, in practice, each diode is almost in contact with the edge 2s, but without touching it, so as to benefit as much as possible. of the wide angle a of its light beam.
Comme montré à la figure 1 , la borne 9 est reliée par un circuit électrique 14 à un transformateur abaisseur de tension 15, lui-même relié au réseau. Ce transformateur délivre un courant basse tension de 12 volts. Lorsque les sources lumineuses 6 sont alimentées, les faisceaux lumineux qu'elles émettent sont réfléchis contre les grandes faces, respectivement avant 2b et arrière 2a de la plaque 2, mais aussi par les chants latéraux et inférieur qui sont chacun recouverts par une pellicule 16 s'opposant à la diffusion des rayons. Dans la zone de chaque élément 3a 3b du motif décoratif 3, les rayons lumineux coopèrent avec la couche de colle 5 pour assurer l'illumination de la face de l'élément 3a 3b tournée vers l'avant, c'est-à-dire en direction de l'oeil 17 de l'observateur. Il en résulte que dans l'ensemble du panneau, seuls les éléments du motif 3 sont illuminés de manière vive, ce qui les rend parfaitement perceptibles.As shown in Figure 1, terminal 9 is connected by an electrical circuit 14 to a step-down transformer 15, itself connected to the network. This transformer delivers a low voltage current of 12 volts. When the light sources 6 are supplied, the light beams which they emit are reflected against the large faces, respectively front 2b and rear 2a of the plate 2, but also by the lateral and lower edges which are each covered by a film 16 s opposing the diffusion of rays. In the area of each element 3a 3b of the decorative pattern 3, the light rays cooperate with the layer of adhesive 5 to ensure the illumination of the face of the element 3a 3b facing forward, that is to say towards the observer's eye 17. As a result, in the entire panel, only the elements of pattern 3 are brightly illuminated, which makes them perfectly perceptible.
On notera que, si besoin est, la plaque peut être récupérée et réutilisée puisque, après retrait des éléments 3a et 3b et nettoyage à l'alcool des particules adhésives, la face 2a ayant reçu ces éléments ne présente aucune altération et peut être immédiatement réutilisée.It will be noted that, if necessary, the plate can be recovered and reused since, after removing the elements 3a and 3b and cleaning the adhesive particles with alcohol, the face 2a having received these elements has no deterioration and can be immediately reused .
Dans une variante de réalisation, non représentée, les ailes du profilé 12 ne comportent pas de retours 13 et sont fixées sur le panneau par des vis ou par collage. Les motifs décoratifs qui sont décrits ci dessus comme étant collés sur la face arrière 2a peuvent aussi être réalisés par sérigraphie sur cette face arrière. Il ressort de la description qui précède que le panneau selon l'invention simplifie le travail du monteur, optimise l'éclairement du motif, supprime les limites constructives actuelles et peut être réutilisé.In an alternative embodiment, not shown, the wings of the profile 12 do not have returns 13 and are fixed to the panel by screws or by gluing. The decorative patterns which are described above as being glued to the rear face 2a can also be produced by screen printing on this rear face. It appears from the above description that the panel according to the invention simplifies the work of the editor, optimizes the lighting of the pattern, removes the current constructive limits and can be reused.
Enfin, grâce au recours à des diodes alimentées en basse tension et au montage de ces diodes sur un circuit imprimé, le panneau est insensible à l'humidité et peut être utilisé dans des ambiances très humides, à l'intérieur comme à l'extérieur. Finally, thanks to the use of diodes supplied with low voltage and the mounting of these diodes on a printed circuit, the panel is insensitive to humidity and can be used in very humid atmospheres, inside and outside .

Claims

REVENDICATIONS
1. Panneau luminescent composé :1. Composed luminescent panel:
- d'une plaque (2) translucide, en matière synthétique, présentant sur sa face arrière un motif (3), décoratif ou publicitaire, - d'au moins une source lumineuse (6) composée de plusieurs diodes et disposée dans un boîtier support (12) contre l'un des chants de la plaque (2),- a translucent plate (2), made of synthetic material, having on its rear face a pattern (3), decorative or advertising, - at least one light source (6) composed of several diodes and disposed in a support housing (12) against one of the edges of the plate (2),
- de pellicules (16) recouvrant les chants de la plaque, autres que celui juxtaposé à la source lumineuse (6), caractérisé en ce que les diodes constituant la source lumineuse (6) fournissent chacune une intensité lumineuse comprise entre 0,5 et 1 Candela et un pinceau lumineux s'évasant sur un angle compris entre 60 et 80°, chaque diode produisant une lumière monochromatique dont la longueur d'onde est voisine de la longueur d'onde colorimétrique des éléments (3a, 3b) du motif (3), et étant disposée à proximité du chant correspondant, mais sans contact avec lui. - films (16) covering the edges of the plate, other than that juxtaposed with the light source (6), characterized in that the diodes constituting the light source (6) each provide a light intensity of between 0.5 and 1 Candela and a light brush flaring at an angle of between 60 and 80 °, each diode producing monochromatic light whose wavelength is close to the colorimetric wavelength of the elements (3a, 3b) of the pattern (3 ), and being placed close to the corresponding edge, but without contact with it.
2. Panneau selon la revendication 1 caractérisé en ce que les diodes sont fixées sur la plaquette (7) d'un circuit imprimé posé sur les deux retours intérieurs (10) d'un profilé (12), ayant une section en "U" retourné dont les ailes sont munies de moyens de fixation sur le panneau.2. Panel according to claim 1 characterized in that the diodes are fixed on the wafer (7) of a printed circuit placed on the two inner returns (10) of a profile (12), having a "U" section turned upside down, the wings of which are fitted with means of attachment to the panel.
3. Panneau selon la revendication 2, caractérisé en ce que les moyens de fixation du profilé (12) sur la plaque (2) sont constitués par deux retours (13) du profilé, ces retours étant tournés vers l'intérieur, disposés au dessous des retours (10) pour le circuit imprimé (7) et aptes à coopérer avec des rainures longitudinales (1 1 ) ménagées dans la plaque 2, à proximité de son chant supérieur.3. Panel according to claim 2, characterized in that the means for fixing the profile (12) on the plate (2) consist of two returns (13) of the profile, these returns being turned inwards, arranged below returns (10) for the printed circuit (7) and able to cooperate with longitudinal grooves (1 1) formed in the plate 2, near its upper edge.
4. Panneau selon la revendication 1, caractérisé en ce que la nappe dans laquelle les éléments décoratifs (3a, 3b) sont découpés, est une nappe en polychlorure de vinyle enduite sur une face d'une colle acrylique (6) dont les indices, respectivement, de réflexion et de réfraction, sont proches de ceux de la plaque (2).4. Panel according to claim 1, characterized in that the sheet in which the decorative elements (3a, 3b) are cut, is a polyvinyl chloride sheet coated on one side with an acrylic adhesive (6) whose indices, respectively, reflection and refraction, are close to those of the plate (2).
5. Panneau selon la revendication 1, caractérisé en ce que la distance entre chaque diode et le chant du panneau lui faisant vis à vis est compris entre 0,1 et 1 mm. 5. Panel according to claim 1, characterized in that the distance between each diode and the edge of the panel facing it is between 0.1 and 1 mm.
PCT/FR1996/001747 1995-11-10 1996-11-06 Luminescent panel WO1997017689A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9513705A FR2741180B1 (en) 1995-11-10 1995-11-10 LUMINESCENT PANEL
FR95/13705 1995-11-10

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WO1997017689A1 true WO1997017689A1 (en) 1997-05-15

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WO (1) WO1997017689A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2782829A1 (en) * 1998-08-26 2000-03-03 Editions Publicite Excelsior LUMINOUS DISPLAY PANELS
DE10002347A1 (en) * 2000-01-20 2001-08-09 Borsi Kg F Display plate, in particular, for advertising purposes comprises an at least partially transparent carrier layer and a metal coating which is at least partially reflected from the finished edge surfaces
EP0972475A3 (en) * 1998-07-06 2001-09-26 Becker & Hach GmbH & Co.KG Illuminated picture holder
FR2904134A1 (en) * 2006-07-20 2008-01-25 Aees Soc Par Actions Simplifie Signaling device for forming e.g. safety lighting, has lighting unit, whose light source is positioned in contact with edge of plate, and whose another light source is towards edge of plate to ensure light for graphic security element

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2659776A1 (en) * 1990-03-13 1991-09-20 Burlot Henri Presentation device with plates having luminous contours
DE9217383U1 (en) * 1992-12-19 1993-02-18 Roehm Gmbh, 6100 Darmstadt, De

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2659776A1 (en) * 1990-03-13 1991-09-20 Burlot Henri Presentation device with plates having luminous contours
DE9217383U1 (en) * 1992-12-19 1993-02-18 Roehm Gmbh, 6100 Darmstadt, De

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972475A3 (en) * 1998-07-06 2001-09-26 Becker & Hach GmbH & Co.KG Illuminated picture holder
FR2782829A1 (en) * 1998-08-26 2000-03-03 Editions Publicite Excelsior LUMINOUS DISPLAY PANELS
WO2000012930A1 (en) * 1998-08-26 2000-03-09 Editions Publicite Excelsior Display backlights
US6536909B1 (en) 1998-08-26 2003-03-25 Editions Publicite Excelsior Display backlights
DE10002347A1 (en) * 2000-01-20 2001-08-09 Borsi Kg F Display plate, in particular, for advertising purposes comprises an at least partially transparent carrier layer and a metal coating which is at least partially reflected from the finished edge surfaces
FR2904134A1 (en) * 2006-07-20 2008-01-25 Aees Soc Par Actions Simplifie Signaling device for forming e.g. safety lighting, has lighting unit, whose light source is positioned in contact with edge of plate, and whose another light source is towards edge of plate to ensure light for graphic security element

Also Published As

Publication number Publication date
FR2741180A1 (en) 1997-05-16
FR2741180B1 (en) 1998-02-06

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