EP4163535A1 - Lighting device with decorative effect comprising a light faceplate and a removable decorative element - Google Patents

Abstract

Lighting device (100) with a decorative effect intended to be recessed into a false ceiling (200), said device (100) comprising: - a frame (10) incorporating a light panel (20) defining a lighting surface ( 20a), - a removable decorative element (30) constituted by a plate (31) in a material allowing light to pass and covering said lighting surface (20a) to produce a decorative effect when the light passes through said plate (31 ), said plate (31) comprising a useful surface (31a) covering the lighting surface (20a) and a pair of mutually opposite edges (32, 33) comprising flaps (32a, 33a) each forming an angle (α ) less than 89° with respect to said useful surface (31a) so that said flaps (32a, 33a) rest on said frame (10) to hold the plate (31) in position by clamping against the frame (10 ).

Description

Technical area

The present invention relates to the field of lighting devices.

The object of the present invention relates more particularly to a lighting device with a decorative effect which is easily customizable and interchangeable.

The present invention will find many advantageous applications in the field of interior decoration of buildings receiving the public, customers or staff such as, for example, offices, waiting rooms, shops, schools, hospitals, hotels, restaurants, reception venues, museums, exhibition halls, administrations, etc.

Of course, other advantageous applications could be envisaged in other fields for which it would be desirable to equip a place in an ephemeral or temporary manner with lighting with a customizable and interchangeable decorative effect.

Prior art

In the field of lighting devices, we know the principle of light tiles that are embedded in false ceilings, for example during the renovation of a professional office.

• Couper le courant ;
• Débrancher le cordon d'alimentation du secteur ;
• Enlever l'ancienne dalle lumineuse du plafond ou la dalle d'habillage existante ;
• Dévisser le capot du transformateur à l'aide du tournevis ;
• Brancher le cordon d'alimentation au transformateur ;
• Revisser le capot du transformateur ;
• Connecter le transformateur à la nouvelle dalle lumineuse ;
• Connecter le transformateur à la dalle lumineuse ;
• Insérer ladite dalle lumineuse au niveau de l'armature du faux plafond ;
• Remettre le courant.

By false ceiling within the meaning of the present invention, is meant throughout the following description a suspended false ceiling (or fixed false ceiling) which, as its name indicates, is suspended from a (former) ceiling by the bias lines and rails. Such a false ceiling thus forms a metal framework which is then clad with technical or non-technical trim elements such as, for example, acoustic tiles, plasterboard and/or light tiles. The installation of light tiles in a false ceiling includes the following steps in particular:

• Cut power ;
• Unplug the power cord from the mains;
• Remove the old light slab from the ceiling or the existing trim slab;
• Unscrew the transformer cover using the screwdriver;
• Connect the power cord to the transformer;
• Screw the transformer cover back on;
• Connect the transformer to the new luminous tile;
• Connect the transformer to the light slab;
• Insert said light slab at the level of the frame of the false ceiling;
• Restore power.

These operations are long and tedious.

These generally require the intervention of an electrician.

The Applicant observes that there are already luminous tiles which include an element with a decorative effect.

On the other hand, the light tiles which have such an element with a decorative effect are not customizable or interchangeable since the element with a decorative effect is integrated directly into the tile. It is therefore integral with the slab.

Thus, when you want to change the decor or the general atmosphere of the room, it is necessary to replace the complete light panel, which is most often prohibitive given all the above operations to be undertaken with a electrician.

This type of slabs with a decorative effect has therefore not been very successful so far.

It is indeed difficult to convince a hospital to decorate each room with a decorative effect luminous tile if it has to be replaced as soon as the decor is no longer suitable for the occupants (here in this example the patient occupying the room) or as soon as the occupant changes.

In the same way, the ready-to-wear retailer will not change all the lights in his shop for each change of display window, season or clothing collection. For these reasons, the Applicant submits that the lighting devices known hitherto and comprising a light panel with a decorative effect are not satisfactory and do not allow them to be easily personalized and interchangeable.

Summary of the invention

The present invention aims to improve the situation described above.

An object of the present invention is to solve at least one of the problems of the technological background described above.

One of the objectives of the present invention is in particular to remedy the various drawbacks mentioned above by proposing a lighting device with a decorative effect which is simple and easy to install and whose decorative element is easily customizable and interchangeable.

To this end, the object of the present invention relates, according to a first aspect, to a lighting device with a decorative effect which is intended to be recessed into a false ceiling.

According to the present invention, the lighting device comprises a frame, preferably of square or rectangular shape, integrating a luminous panel defining a lighting surface.

Advantageously, the lighting device according to the present invention comprises a removable decorative element constituted by a plate in a material allowing light to pass. Advantageously, the plate covers (at least partially) the lighting surface so as to produce a decorative effect when the light from the luminous panel passes through the plate.

The removability of the plate is characteristic of the present invention.

In an advantageous embodiment, the plate comprises a useful surface covering (at least partially) the lighting surface and a pair of mutually opposite edges comprising flaps forming an angle, called flap angle, less than 89° with respect to to the useful surface so that the flaps rest on the frame to hold the useful surface of the plate in position by clamping against the lighting surface of the slab. Preferably, the flap angle is between 65° and 85°.

Preferably, the flap angle is between 70° and 80°.

In an advantageous embodiment, the plate comprises two predefined fold lines favoring the folding of said plate to form the flaps.

In an advantageous embodiment, the plate is in the form of a square with a side substantially equal to 624 millimeters (± 2 millimeters), each flap having a width substantially equal to 14 millimeters (± 2 millimeters).

Such a width of flap ensures a good clamping of the flap against the frame to firmly hold the useful surface of the plate in position against the lighting surface of the slab. In an advantageous embodiment, the plate is made of a translucent or transparent material.

In an advantageous embodiment, the plate is made at least partially of thermoplastic polyester.

Preferably, the plate is made of extruded thermoplastic polyester of the amorphous polyethylene terephthalate A-PET type.

In an advantageous embodiment, the useful surface of the plate comprises a printing layer with a decorative effect using inks resistant to ultraviolet rays.

In an advantageous embodiment, the light tile is an LED tile.

Correlatively, the object of the present invention relates, according to a second aspect, to an installation comprising a false ceiling in which is embedded a set of lighting devices as described above, which are arranged between them so that the plates are juxtaposed next to each other to form a luminous decoration on the ceiling.

Thus, the object of the present invention, by its various functional and structural aspects described above, makes it possible to provide a lighting device with a decorative effect, now attractive, which offers ease of customization and interchangeability which opens the possibility of adapting the decor of a place by avoiding the need for an electrician to replace the complete luminous slab.

Description of figures

• [Fig.1]
  La figure 1 représente une première vue schématique éclatée d'un dispositif d'éclairage encastré dans un faux-plafond selon un exemple de réalisation de la présente invention ; et
• [Fig.2]
  La figure 2 représente une deuxième vue schématique en coupe transversale d'un dispositif d'éclairage conforme à la figure 1.

Other characteristics and advantages of the present invention will become apparent from the description below, with reference to the figure 1 and 2 which illustrate an example of realization devoid of any limiting character and on which:

• [ Fig.1 ]
  There figure 1 shows a first exploded schematic view of a lighting device recessed in a false ceiling according to an embodiment of the present invention; And
• [ Fig.2 ]
  There figure 2 shows a second cross-sectional schematic view of a lighting device according to the figure 1 .

detailed description

A lighting device according to an exemplary embodiment of the present invention will now be described in the following with reference together with the figures 1 and 2 . The same elements are identified with the same reference signs throughout the description which will follow.

As indicated previously in the preamble to this description, current light panels generally emit neutral light.

Sometimes decorative elements are incorporated directly into the lighting device to produce a decorative effect when light passes through the decorative element.

On the other hand, it remains necessary with the solutions of the prior art to replace the complete slab when the person gets tired of the decorative effect of the decorative element, which makes this unattractive type of lighting and does not favor the development of this type of lighting device with a decorative effect.

Today, sales associated with lighting devices with a decorative effect therefore remain very low.

One of the objectives of the present invention is to provide a lighting device with an attractive decorative effect which is customizable and interchangeable with a minimum of operations without the intervention of an electrician and without replacing the light panel.

The lighting device 100 proposed here within the framework of the present invention achieves this objective.

In the example described here and illustrated in figures 1 and 2 , provision is made for the implementation of a lighting device 100 which has a decorative effect and which is intended to be embedded in a false ceiling 200.

In this example, the lighting device 100 conventionally comprises a frame 10 of square (or possibly rectangular) shape which incorporates a light panel 20.

During the embedding of the device 100 in the false ceiling 200, the frame 10 of the device 10 therefore comes to rest on the metal reinforcement 210 of the false ceiling 200 which is formed by hangers and rails fixed directly to the ceiling.

• de type dalle LED (de l'anglais « Light-Emitting Diode » ou en français « Diode électroluminescente ») ; ou
• ou de type dalle OLED (de l'anglais « Organic Light-Emitting Diode » ou en français « Diode électroluminescente organique »).

It is understood here that the luminous panel 20 can be a panel:

• of the LED panel type (from English “Light-Emitting Diode” or in French “Diode electroluminescente”); Or
• or of the OLED panel type (from the English "Organic Light-Emitting Diode" or in French "Organic Light-Emitting Diode").

Such an LED or OLED panel is particularly appreciated for its energy performance.

To achieve the above objective, the concept underlying the present invention is to provide a decorative element 30 which is removable.

In this example, the removable decorative element 30 consists of a plate 31 structurally independent of the light panel 20 and of the frame 10.

Such a plate 31 is characteristic of the present invention.

This is made of a material allowing light to pass such as for example a transparent or translucent material.

In the embodiment described here, the selection of the material used was long and meticulous.

The material selected at the end of the various tests carried out by the applicant offers complete satisfaction and makes it possible to meet the various economic, security, optical and mechanical constraints imposed by the field of lighting and buildings receiving the public, customers or Staff.

Thus, after numerous tests, the Applicant has selected a plate 31 in a material belonging to the family of extruded thermoplastic polyesters and more particularly amorphous polyethylene terephthalate (or A-PET).

• celui-ci laisse bien passer la lumière avec une transmission lumineuse d'environ 90% ;
• il s'imprime facilement à l'encre pour réaliser des effets décoratifs esthétiques ;
• il est robuste et offre de bonnes propriétés de résistance mécanique aux chocs ;
• il est difficilement inflammable (classement au feu B - s1 selon norme EN 13501-1) ;
• il résiste aux produits chimiques d'entretien et aux solvants.

The use of such a material is particularly appreciated, and this in particular for the following reasons:

• it allows light to pass well with a light transmission of around 90%;
• it is easily printed in ink to achieve aesthetic decorative effects;
• it is robust and offers good properties of mechanical resistance to shocks;
• it is hardly flammable (fire classification B - s1 according to standard EN 13501-1);
• it is resistant to cleaning chemicals and solvents.

Provision is therefore preferably made for such a plate 31 of amorphous polyethylene terephthalate. To comply with the dimensioning of the luminous tiles 20, the plates 31 have a square shape with sides having a length of 624 millimeters.

In this example, a useful surface 31a is defined for this plate 31 which will come to cover the lighting surface 20a defined by the luminous panel 20 so as to produce a decorative effect when the light from the luminous panel 20 passes through the plate. 31.

In this example, the useful surface 31a of the plate 31 comprises a printing layer with a decorative effect using inks resistant to ultraviolet rays.

Such printing is made possible thanks to the PET-A used for plate 31.

It will be understood here that it is this impression which makes it possible to edit the desired decor at the discretion of the end user.

The fact of being able to edit this decoration by inkjet printing is particularly advantageous. It becomes possible with a dedicated software application or a simple computer to select an image from a photo library of a communication terminal (for example a "SmartPhone" or a digital tablet) and to send this image via the Internet network (or others) so that a printer receives the image to start printing the decorative element, here the selected image, on the plate 31.

This plate 31, after printing, is then machined so as to undergo folding at the level of the folding lines 34. The presence of these folding lines 34 favors the folding of said plate 31 to form flaps 32a, 33a which will be used to hold plate 31 against slab 20.

In this example, the flaps 32a, 33a each have a width of 14 millimeters and a length corresponding to that of the plate, namely here 624 millimeters.

In this example, provision is made to fold the plate 31 at the fold lines 34 so as to form flaps 32a, 33a forming an angle α of between 70° and 80° with respect to the useful surface 31a of the plate 31.

Such an angle a, called a flap angle, allows good gripping of the useful surface 31a of the plate 31 against the lighting surface 20a of the light panel 20.

The implementation of such a printing service on a plate 31 and the presence of these flaps 32a, 33a makes it possible to offer a personalization service for a location within 24 hours, or even less.

It then becomes possible, for example, for a hospital to offer patients a personalization of a room with, for example, a print on the plate of a family photo or a photo of the grandchildren or others.

All the patient or accompanying family has to do is send a photograph to the printer. After printing and machining, the hospital staff (or the dedicated subcontracted service) receives the printed and machined plate 31 and replaces the old plate in position with the new plate 31, without touching the electrical installation. and without risk of electrocution.

The new plate 31 is easily positioned against the luminous panel 20 in place thanks to the pinching exerted by the flaps 32a, 33a against the frame 10 of the panel 20.

Of course, it will be easy to understand that this principle can be transposed to other sectors of activity or for other occasions.

It will also be understood that it is possible to create large luminous decorations on the ceiling by juxtaposing several plates 31 together, one beside the other.

It will also be noted that the machining of the plate 31 to form the flaps can be done by the end user, thanks to the presence of the fold lines 34 mentioned above. This facilitates the transport of the printed plate 31.

It should be noted that this detailed description relates to a particular embodiment of the present invention, but that in no case does this description have any limiting character to the subject of the invention; on the contrary, it aims to remove any possible imprecision or any misinterpretation of the following claims.

It should also be noted that the reference signs placed between parentheses in the following claims are in no way limiting; these signs have the sole purpose of improving the intelligibility and understanding of the following claims as well as the scope of the protection sought.

Claims (10)

Lighting device (100) with a decorative effect intended to be recessed in a false ceiling (200), said lighting device (100) comprising: - a frame (10) of square or rectangular shape incorporating a light panel (20) defining a lighting surface (20a), - a removable decorative element (30) consisting of a plate (31) in a material allowing light to pass and covering the said lighting surface (20a) so as to produce a decorative effect when the light from the light panel (20) passes through said plate (31); said device (100) being characterized in that said plate (31) comprises a working surface (31a) covering the lighting surface (20a) and a pair of mutually opposite edges (32, 33) comprising flaps (32a, 33a) each forming an angle (a), called flap angle, less than 89° with respect to said useful surface (31a) so that said flaps (32a, 33a) rest on said frame (10) to maintain in position by clamping the useful surface (31a) of said plate (31) against the lighting surface (20a) of said panel (20). Device (100) according to claim 1, wherein said flap angle (a) is between 65° and 85°, preferably between 70° and 80°. Device (100) according to claim 1 or 2, wherein said plate (31) comprises two fold lines (34) favoring folding of said plate (31) to form said flaps (32a, 33a). Device (100) according to any one of the preceding claims, in which the said plate (31) is in the form of a square with a side substantially equal to 624 millimeters, each flap (32a, 33a) having a width substantially equal to 14 millimeters. Device (100) according to any one of the preceding claims, in which the said plate (31) is made of a translucent or transparent material. Device (100) according to any one of the preceding claims, in which the said plate (31) is made at least partially of thermoplastic polyester. Device (100) according to Claim 6, in which the said plate (31) is made of extruded thermoplastic polyester of the amorphous poly-ethylene terephthalate A-PET type. Device (100) according to any one of the preceding claims, in which the useful surface (31a) of the said plate (31) comprises a printing layer with a decorative effect by inks resistant to ultraviolet rays. Device (100) according to any one of the preceding claims, in which the light panel (20) is an LED panel. Installation comprising a false ceiling (200) in which is embedded a set of lighting devices (100) according to any one of the preceding claims, which are arranged together so that the plates (31) are juxtaposed next to each other to form a luminous decoration on the ceiling.

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