FR3064530A1 - LUMINOUS GLASS ASSEMBLY - Google Patents

Abstract

A luminous glazed unit (100) comprising at least two transparent elements (2, 3), each comprising a single rigid substrate made of glass or rigid plastic or laminated material, two optically coupled light sources (5, 6), in particular at the slice, of the two transparent elements (2, 3) forming a light guide, extraction means (7, 7 ') of the guided light respectively associated with each of said transparent elements (2, 3), and an optical isolator (4 ) separating the two transparent elements (2, 3), characterized in that the optical isolator (4) is a gas strip or vacuum, such as an air gap, and in that the transparent elements (2, 3) are spaced from one another by spacing means (40) arranged near the edge of the transparent elements, in particular a spacer (41), in particular formed from one or more pieces, preferably arranged on the whole periphery of the whole.

Description

© Publication no .: 3,064,530 (to be used only for reproduction orders) (© National registration no .: 17 52760 ® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY

COURBEVOIE © Int Cl ⁸ : B 32 B 17/10 (2017.01), B 32 B 17/06, F21 V33 / 00

A1 PATENT APPLICATION

©) Date of filing: 03.31.17. © Applicant (s): SAINT-GOBAIN GLASS FRANCE (30) Priority: Public limited company - FR. @ Inventor (s): BARLET MARINA, GOUY AURELIEN andWOLFF RICHARD. (43) Date of public availability of the request: 05.10.18 Bulletin 18/40. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents ® Holder (s): SAINT-GOBAIN GLASS FRANCE related: Anonimous society. ©) Extension request (s): © Agent (s): SAINT GOBAIN RESEARCH Anonimous society.

FR 3 064 530 - A1 (34) LIGHT GLASS ASSEMBLY.

©) Luminous glazed assembly (100) comprising at least two transparent elements (2, 3), each comprising a single rigid substrate of glass or rigid plastic material or being laminated, two light sources (5, 6) optically coupled, in particular at the edge, two transparent elements (2, 3) forming a light guide, means for extracting (7, 7 ') the guided light associated respectively with each of said transparent elements (2, 3), and an optical isolator (4) separating the two transparent elements (2, 3), characterized in that the optical isolator (4) is a gas or vacuum plate, such as an air layer, and in that the transparent elements ( 2, 3) are spaced from each other by spacing means (40) arranged near the edge of the transparent elements, in particular a spacer (41), in particular formed of one or more parts, of preferably arranged over the entire periphery of the assembly.

LIGHT GLASS ASSEMBLY

The present invention relates to the field of light and more particularly relates to a luminous glazed assembly by extraction of guided light in a glass.

It is known to form a luminous glazing by illuminating a glass by the edge with a light source like a set of inorganic light emitting diodes. The light thus injected is guided by total internal reflection inside this glass thanks to the refractive index contrast with the surrounding materials. This light is then extracted using signaling means which are conventionally a diffusing layer.

Naturally, the diodes can be controlled to supply, via the pattern diffusing, a continuous or flashing light zone or alternatively changing color.

The Applicant has already proposed in patent WO2015118280 to widen the range of available luminous glazings based on a light guide glass with edge lighting by making possible the simultaneous vision of a first luminous zone of a first color visible from the first side of the glazing, and a second light zone of a second distinct color visible on the other side of the glazing. Such a luminous glazed assembly comprises on the one hand two glazing units, each of the glazing units being associated with lighting means by the edge and provided with light extraction means, and on the other hand at least one optical separator which is laminated by each of its opposite faces via a plastic interlayer to each of the two panes. The role of the optical separator is to separate the two distinct lighting colors as best as possible in order to obtain the two respective colors of glazing. The optical separator is formed from a low-index plastic film, such as fluopolymer.

However, such an assembly requires a relatively long assembly process with regard to the cutting and positioning of the film and spacers. However, efforts are still being made to simplify the manufacturing processes, while optimizing the optical results targeted in the final product, or even to improve them.

The object of the invention is therefore to propose a luminous glazed assembly which is simple to manufacture, without increasing the cost thereof, and provides color renditions for each of the main faces of the luminous assembly as sharply and clearly as possible, while minimizing , or even by removing the effects of blurring and / or mixing colors.

According to the invention, the luminous glazed assembly comprises at least first and second transparent (rigid) elements from which light is extracted and ensuring the mechanical rigidity of said assembly, the first transparent element comprising at least a first glass substrate or plastic (rigid), in particular poly methyl methacrylate (PMMA), and the second transparent element comprising at least one second substrate made of glass or plastic (rigid) especially in poly methyl methacrylate (PMMA), first light source optically coupled to the first transparent element forming a light guide, in particular at the edge of the first transparent element, a second light source optically coupled to the second transparent element forming a light guide, in particular to the edge of the second transparent element and first and second means for extracting the guided light associated respectively t to each of said first and second transparent elements, in particular each of the first and second light extraction means comprising an extraction coating which is covered (preferably directly on) at least in congruence by a masking coating, and an insulator optics separating the first and second transparent elements,

The optical isolator is a gas gap or the vacuum, preferably the optical isolator is an air gap, and the rigid transparent elements are spaced from each other by spacing means arranged at the periphery of the internal main faces of the first and second transparent elements, in particular a spacer, in particular formed of one or more parts, the spacing means making it possible to provide the gas (or vacuum) blade between the first and second transparent elements, preferably the spacing means being arranged over the entire periphery of the assembly.

Each transparent element preferably has a refractive index (at 550 nm) equal to that of glass or close to glass.

The first rigid transparent element (in particular the first substrate), in particular made of plastic, preferably has a thickness of at least 1mm or at least 2mm.

The second rigid transparent element (in particular the second substrate), in particular made of plastic, preferably has a thickness of at least 1mm or at least 2mm.

Each transparent element has two opposite main faces and a peripheral edge connecting the two faces. Light extraction is preferably carried out from a main face.

Advantageously, the optical isolator such as the gas (in particular air) blade has a thickness E0 of at most 20mm, preferably at most 10mm, or even preferably at most 5mm.

The optical isolator, that is to say the gas plate or the vacuum, is obtained by spacing means arranged between the rigid transparent elements (in particular between the first and second glass substrates). This is in particular the spacer formed from one or more parts. The spacer forms a peripheral frame or forms at least two parts arranged between the first and second rigid transparent elements and at two opposite sides of the assembly.

The spacer is integral with the main internal faces of each of the first and second transparent elements.

The spacing means (including the spacer) have a thickness (dimension separating the first and second transparent elements) corresponding to that of the gas plate (or the vacuum).

The spacing means (incorporating the spacer) have a width / depth (the depth being the direction parallel to the transparent elements and considered from the edge of the transparent elements towards the gas plate or the vacuum which are preferably at most 20mm.

Surprisingly, it turned out that by providing an optical isolator such as a gas slide, instead of a body / element / physical barrier, the color rendering was optimal, allowing a frank separation of the two colors viewed on each of the opposite sides of the assembly, without mixing colors, while providing increased clarity of each color, without the blurring effect that an optical plastic isolator can sometimes provide.

In addition, the spacing means, in particular the spacer, ensure mechanical cohesion of the first and second transparent elements and therefore of the assembly. The assembly thus forms a monobloc assembly, allowing easy manipulation of the assembly during its installation in its final destination, and guaranteeing a lasting structure as for its mechanical rigidity without affecting in time the optical isolator like the gas blade. .

In addition, the manufacturing process is simplified, and may even be of reduced cost, since, as in the prior art, it does not require cutting a specific plastic film (film in particular at low index) and with ad hoc dimensions, and to leaf through it, the step of laminating a low index film being delicate with an increased risk of defects resulting therefrom (folds of the film during laminating, increased blurring, etc.).

In the following description, the term "internal" means to describe a main face of a rigid transparent element or of a rigid substrate, the face disposed towards the inside of the assembly, and by "external", the face oriented towards the outside of the whole.

According to one characteristic, the first light source associated with the first transparent element delivers light of wavelength distinct from the second light source of the second transparent element.

Preferably, the assembly includes peripheral masking means arranged to absorb light (avoid the transmission of light) and to visually hide from the outside of the assembly, the spacing means. The peripheral masking means are such as a dark or black adhesive strip, or an enamel deposit, or a masking coating (from the extraction means), the masking means being associated with the first and second elements. transparent (preferably on the internal main face or the external main face directly or even on a light extraction coating and arranged in particular under and / or near the spacing means, in particular extending opposite the edge of transparent elements beyond the spacing means over at least 2mm or even up to 15mm.

The spacing means comprise a spacer which is preferably secured by bonding by its faces arranged vis-à-vis with the main internal faces of the transparent elements. The spacing means can therefore be on the aforementioned peripheral masking means. The spacing means can therefore be bonded to the peripheral masking means which are masking coatings such as layers / deposits of enamel.

In particular, the spacer is glued using a transparent or opaque double-sided adhesive, possibly reflective. In particular, the spacer is glued via transparent fixing means, such as a double-sided transparent adhesive.

The spacer is made of plastic or composite material, transparent or not, and / or based on a metallic material such as stainless steel, steel or aluminum, or is even made of glass.

The spacer may have a rigid body such as a profile, or a flexible body.

The spacing means comprise a spacer and the assembly comprises sealing means, in particular to water and / or to gases and water vapor, which are formed by fixing and / or sealing means. the spacer to the main internal faces of the first and second transparent elements. In particular, the sealing means comprise on the one hand means for fixing the spacer by gluing (the means for fixing by gluing being arranged at the interface between the spacer and the internal main faces of the first and second elements transparencies), said fixing means forming a gas and water vapor barrier such as butyl, and on the other hand a waterproof sealant such as polyurethane, or polysulfide or silicone , arranged between the first and second transparent elements (their internal main face) and on the external face of the spacer opposite to the optical isolator such as the gas plate (or the vacuum).

An example spacer has a rigid base body made of a thermoplastic material, such as acrylonitrile styrene (SAN) or polypropylene, and reinforcing fibers, such as glass, which are mixed with the thermoplastic material, as well that a sheet providing gas and water vapor tightness bonded to the face intended to be the external face of the spacer in the position mounted in the glazing (arranged opposite the gas slide). The base body is hollow and also houses a desiccant. Such a spacer, based on SAN and glass fibers, is known for example under the trade name SWISSPACER® from the Applicant when the sealing sheet of the base body is made of aluminum, and under the name SWISSPACER V® when the Basic body sealing sheet is made of stainless steel.

Another example of a spacer is a flexible spacer made of solid material, such as polyethylene or acrylic, and incorporating desiccant.

Advantageously, depending on the end use of the luminous glazed assembly, a glass spacer may be preferred.

The spacer may not be of the same material over the entire periphery of the glazed assembly.

The spacer, and the sealing means which may constitute sealing means, may suffice to carry out the mechanical assembly of the two spaced apart transparent elements.

Note that vacuum as an optical isolator is not preferred, since the method of manufacturing a vacuum glazing is more complex than a gas slide glazing, and more expensive. In addition, a vacuum glazing implies the presence of a multitude of spacers, such as balls, which are distributed over the entire surface of the glass substrates, providing a visual rendering possibly disturbed with respect to the colored visual effect. wish.

The spacing means, their arrangement and the securing and sealing means are designed so as to avoid transmission of light from one transparent element to the other via said spacing means and said securing means and d sealing. The spacing means and the securing and sealing means have a depth (distance from the edge of the transparent elements towards the interior of the gas slide) which is adapted and limited to ensure the necessary mechanical spacing function while allowing an optimal view through the whole.

Preferably, the first and second transparent elements are made of glass, preferably having a high light transmission, of at least 85%, when the measurement is carried out under illuminant D65 on a glass substrate with parallel faces 4 mm thick. . Preferably, the transparent elements are made of extra-clear glass, such as the DIAMANT® glass sold by the Applicant.

The transparent elements can be flat or curved.

When at least one transparent element is a glass substrate, the assembly comprises a transparent protective sheet, preferably made of plastic, which is in adhesive contact with the glass substrate and covers said glass substrate. The transparent protective sheet is advantageously made of plastic and constitutes a safety in case of glass breakage, while retaining the pieces of glass.

In particular, the first substrate may be made of glass and the assembly comprises a transparent protective sheet, preferably of plastic material, which is in adhesive contact with the first glass substrate and covers said first glass substrate and preferably the second substrate is glass and the assembly includes a transparent protective sheet, preferably plastic, which is in adhesive contact with the second glass substrate and covers said second glass substrate.

The assembly may include (for the first transparent element and even for the second transparent element), at least one transparent protective sheet which is made of PVB (polyvinyl butyral) or EVA (ethylene-vinyl acetate) while preferably being secured to the internal main face of the transparent element, which is preferably a glass or polyester substrate, in particular by being bonded with an acrylic adhesive, preferably then being secured to the external main face of the transparent element . Such a transparent protective sheet for one or each monolithic glass substrate of each transparent element is not necessarily necessary when the transparent element consists of laminated glass glazing / laminating interlayer / glass.

In one embodiment, the first and second transparent elements each comprise a single glass substrate, and a transparent protective plastic sheet covering and glued (via transparent glue) to the main external face of the glass substrate, view of the external environment, or covering and bonded to the internal main face of the glass substrate facing the optical isolator such as the gas plate, in particular the transparent protective sheet having a thickness of at most 1.2 mm , and the transparent protective sheet being made of PVB or EVA preferably being secured to the internal main face of the transparent element, or else being of polyester being bonded with an acrylic adhesive being preferably secured to the external main face of the transparent element. Preferably, in order not to generate blurring, the transparent plastic sheet has a light transmission of at least 85% when the measurement is carried out under illuminant D65.

In another embodiment, the first and second transparent elements are made of laminated glass. Also, the assembly of the invention comprises, on either side of the optical isolator (in particular the gas slide), a first laminated glazing comprising the first glass substrate and another glass or plastic substrate rigid, and a second laminated glazing comprising the second glass substrate and an additional substrate of glass or rigid plastic, the substrates of the first and second glazing being integral with a transparent interlayer film of thermoplastic material, preferably PVB or EVA , in particular with a thickness of at most 1.2mm, in particular 0.3mm or 0.7mm.

The thickness of each transparent element is for example between 2 and 20 mm depending on the application. The thickness of a glass substrate constituting or included in each transparent element is between 2 and 20mm depending on the application. The thickness for a rigid plastic substrate can also be between 2 and 20mm.

The production of light extraction means is known per se.

The first light extraction means preferably comprise a first light extraction coating (diffusing coating) which makes it possible to extract (by reflection and diffusion) the light outside the glass - in particular at the level of the face opposite to that bearing said first extraction coating. A first masking coating (directly) covers at least congruently the first extraction coating, so as to prevent light from passing through and being extracted from the main face of the glass carrying said first extraction means.

And preferably the second light extraction means comprise a second light extraction coating (diffusing coating) which makes it possible to extract (by reflection and diffusion) the light outside the glass - in particular at the level of the face opposite to the one carrying said second extraction coating, and a second masking coating covers (directly) at least in congruence the second extraction coating, so as to prevent light from passing through and being extracted from the main face glass carrying said second extraction means. The first masking coating is directly deposited on the first extraction coating is or integral with a support attached against the main face of the substrate carrying the first extraction coating. The second masking coating is directly deposited on the second extraction coating is or integral with a support attached against the main face of the substrate carrying the second extraction coating. Preferably, the first and second light extraction means are (in particular screen-printed) respectively on the first and second substrates which are preferably tempered glass, in particular on the main internal faces of the first and second substrates, in particular an enamel.

The first as the second light extraction coating is preferably an enamel or an ink or a paint, in particular on the main internal faces of the first and second substrates.

The (first as well as the second) light extraction coating is preferably of white color, defined by a clarity L * of at least 50. Preferably, the mineral pigment is chosen so that it has a white coloration . This pigment is in particular titanium oxide TiO ₂ . Advantageously, this white mineral pigment has a clarity L * as defined in the CIE Lab chromatic representation model (1931) which varies from 65 to 85, measured on the first glazing.

The clarity L * can be measured under the conditions of the CIE recommendation (1931) using an illuminant D ₆ 5, an observer at 10 °, in SCE mode (specular component excluded) diffuse 8 ° (CM 600 Minolta).

The thickness (wet or final) of the (first as well as the second) enamel extraction coating is preferably greater than the thickness of the masking coating (directly) on it.

The (first as the second) masking coating is preferably opaque. It is preferably an enamel, or an ink, or pigments.

The (first as the second) masking coating can be reflective.

The (first as the second) opaque masking coating can be black or gray (dark) or even white (typically by thickening of the extraction coating). The (first as well as the second) opaque masking coating can also be colored and thick enough to be opaque at all the main wavelengths or with an opacity at certain main wavelengths.

The (first as the second) reflective masking coating may be a silver plating, or a thin monolayer or multilayer with at least one functional metallic layer such as a silver and / or aluminum and / or copper and / or gold layer.

The (first as the second) congruent and even (directly) masking coating on the (first as the second) extraction coating does not exceed more than 2mm and even less than 1mm.

For the (first and second) masking coating, the mineral pigment is preferably chosen from pigments which make it possible to impart a black color. By way of examples, there may be mentioned pigments based on chromium, iron, manganese, copper and / or cobalt, in particular in the form of oxides or sulfides. Although chromium-based pigments provide an intense black color, they are not preferred due to problems with their potential toxicity and recycling. Thus, preferably, the mineral pigment is free of chromium.

Advantageously, the black mineral pigment has a clarity L * as defined in the CIE Lab chromatic representation model (1931) which is less than or equal to 15, preferably less than or equal to 10, measured on the masking side.

The mineral pigment for masking may be of a different color than black, and is for example based on Cr ₂ O ₃ (green coloring), Co ₃ O ₄ (blue coloring), cobalt blue, based iron oxide, Fe ₂ O ₃ (brown).

The glass frit of the extraction coating is free of lead oxide PbO for reasons related to the preservation of the environment.

Preferably, the glass frit is a borosilicate based on bismuth oxide Bi ₂ O ₃ and / or zinc oxide ZnO. For example, the glass frit based on Bi ₂ O ₃ contains 35 to 75% by weight of SiO ₂ and 20 to 40% by weight of Bi ₂ O ₃ and advantageously 25 to 30%. For example, the glass frit based on ZnO contains 35 to 75% by weight of SiO ₂ and 4 to 10% by weight of ZnO.

The glass frit has for example the following composition (in percentage by weight): 54% of SiO ₂ , 28.5% of Bi ₂ O ₃ , 8% of Na ₂ O, 3.5% of AI ₂ O ₃ and 3% TiO ₂ , the rest being BaO; CaO, K ₂ O, P ₂ O ₅ , SrO and ZnO.

The manufacture of an assembly of discrete black / white patterns is described in patent WO2012 / 172249 or even EP1549498.

If the (first as the second) extraction coating is in particular screen-printed on the internal face of the glass substrate, the (first as the second) masking coating is directly deposited thereon or not. In a variant, the (first as the second) opaque masking coating, such as an ink, a paint or an enamel, in particular a (printed) ink or paint, is integral with the central lamination interlayer (internal side or face side when the transparent element of the glazed assembly is a laminated glass, or integral with an additional support, in particular plastic or mineral glass (flexible like a (poly (ethylene terephthalate)) called PET, or even a glass ( ultra) thin), possibly sticky or laminated to the first sheet of glass carrying the extraction coating, for example it is a lacquered glass of less than 3mm like the product Planilaque Evolution or Décolaque from the company Applicant laminated by the central lamination interlayer.

The arrangement of the (first and second) light extraction means, their geometry, and their surface distribution on the face of the glass sheet will be adapted according to the desired visual rendering.

According to the invention, in most exemplary embodiments, each transparent element comprises one or more rigid substrates, the first and second light extraction means being associated with at least one internal main face of a rigid substrate of each element transparent, face facing the gas plate (the internal space of the assembly), preferably the first substrate being made of glass and the second substrate being made of glass, in particular the first light extraction means comprise a first coating for extracting light in direct contact with the main face, preferably internal, of the first substrate, and a first masking coating covers at least congruently the first extraction coating and the second light extraction means comprise a second coating of light extraction in direct contact with the main face, preferably internal of the second subs trat. And a second masking coating at least congruently covers the second extraction coating.

In the embodiment for which the assembly comprises for each transparent element, a laminated glazing with two rigid substrates (preferably of glass) of which a first glazing called external glazing in contact with the external environment, and a second glazing called glazing inside in contact with the gas plate (or vacuum), the first and second light extraction means are arranged on the internal face of the internal substrate, preferably of glass, that is to say facing of the gas slide (or vacuum).

The first and second light extraction means can be aligned in planes perpendicular to the main faces of the first and second transparent elements so as to provide two identical patterns facing each other on the faces of the transparent elements, or can be offset. When the first and second light sources do not work and the first and second extraction means are aligned, we see only one pattern regardless of the face of the assembly from which we observe; when the first and second light sources emit in two distinct colors and the first and second extraction means are aligned, the pattern of a different color is observed from each face without the colors mixing due to the barrier optics of the gas slide and perfect alignment of the extraction means. When the first and second light sources do not work and the first and second light extraction means are offset, the pattern associated with this face and the or part of the pattern of the opposite face are observed from each face; when the first and second light sources emit in two distinct colors and the first and second extraction means are offset, the associated pattern of the face is observed from each face with the color of the associated light sources without the colors of two sides do not mix due to the optical barrier of the gas slide (and masking coatings).

In a particular embodiment, the first light extraction means of the first transparent element are arranged on the main external face of said transparent element, and comprise a first light extraction coating, and a first masking coating covers the less congruently the first light extraction coating, the first light extraction coating being the coating in direct contact with said external main face, while the second extraction means of the second transparent element are arranged on the main face internal of said second transparent element and comprise a second light extraction coating, and a second masking coating covers at least congruently the second light extraction coating, the second light extraction coating being the coating in contact direct with said internal main face, the first light extraction means and the second light extraction means being offset from each other.

The light source associated with each transparent element of the glazed assembly of the invention is preferably a set of inorganic light emitting diodes (LEDs) - preferably aligned - on a support with a conductive circuit such as a printed circuit board called support PCB (preferably strip), and optically coupled to the edge of the transparent element. The LEDs can be side emitting ("side emitting" in English), or front emission ("top emitting" in English).

The assembly may include two supports with a conductive circuit or PCB supports which are spaced or butted, or else a single support with a common conductive circuit or PCB support (for a slice on the same side of the two transparent elements).

The support with a conductive circuit, common or individual support, can be a resin composite (epoxy) reinforced with glass fibers (often called FR-4), metallic (aluminum, copper, etc.). It is preferably of millimeter thickness (less than 10mm preferably) or even at most 1mm.

The support (s) with a conductive circuit (PCB) are for example glued with a thermal glue to a metal or plastic profile, itself with a base facing the edge of the glazed assembly, and wings which are for example glued to the main external faces of the glazed assembly.

Thus, the first and second light sources, preferably inorganic light-emitting diodes, are arranged on one or more printed circuit board supports, the supports being made integral with a profile with a base facing the edge, and a wing according to at least one external side of the glazed assembly (in particular the wing being made integral with the external main face of a transparent element), the base of the profile being opposite or even wider than the spacing means ( the spacer and the sealing means). The term "wide" is considered in the direction of the thickness of the whole.

The fixing profile of the first and second light sources can be the mounting profile of the glazed assembly. It can have a U shape or another shape like E.

Advantageously, the fixing profile which houses the first and second light sources comprises at least one partition (not transparent) between the first and second light sources. The partition (s) extend from the base of the profile and perpendicular to said base until the edge of the assembly in contact with the edge or almost).

The applications of a luminous glazed assembly of the invention are varied. Depending on the type of lighting and arrangement, the extent and nature, and the geometry of the extraction means, all types of visual and colorimetric rendering can be envisaged on each of the two opposite faces of the assembly or on only one side.

In an exemplary embodiment, the light extraction is obtained from the external faces of the first and second transparent elements, faces facing the external environment, the first and second extraction means being aligned in a plane perpendicular to the main faces transparent elements (so that the masking coatings of the first and second extraction means are opposite).

In another exemplary embodiment, the extraction of the light is obtained from a single external main face of the assembly, that is to say from the external main face of only the first or the second transparent element, the face external being facing the external environment, the first and second extraction means being offset with respect to a plane perpendicular to the main faces of the transparent elements (so that the masking elements of the first and second extraction means are not not opposite). There may be patterns which complement each other, for example as described in the patent application WO2016001597 of the Applicant.

The luminous glass assembly is intended to present lighting or display a luminous pattern on at least one of the faces of said assembly so that the lighting or the luminous display of one of the faces does not disturb the lighting or the light display on the other side.

"Light display" means the presence of a light or a light pattern on all or part of the surface of the illuminated face. The color of the lighting will depend on the wavelength of the light sources. The light intensity of the illuminated surface may voluntarily be inhomogeneous (surface) depending on the means of light extraction. The light pattern will depend in particular on the distribution and the geometry of the light extraction means.

The areas between the extraction means are preferably transparent.

The invention aims in particular to form signage and / or light decorations (or even functional lighting) of distinct colors continuously or at a given time on two distinct sides of the glazed assembly (the two opposite general faces) , each sign or decoration being switchable independently, preferably automatically or manually by the user (ambient light, etc.).

The invention applies in particular to any glazed assembly between a first accessible space (with pedestrian or vehicle traffic) and a second accessible space (with pedestrian or vehicle traffic), for example a partition, a window or even a floor tile upstairs ...

In a signage application, for a train compartment, you may have written "free" in green on one side and "reserved" in red on the other side or for a separation between a family area or a classic area on can have light side families with patterns for children (geometry, color etc) and classic side a softer light (and / or one or more sober light patterns) for example a warm white.

In a decorative application, for example for a partition between two desks, each person can choose their decor color.

In a partition application between two spaces (building, outside, in a vehicle, in particular for public transport, etc.), each space can have one or more light patterns of color, type of switching (and shape) suitable and a decorative or (more) functional adapted function (lighting).

For example it can be a partition between two offices, between two bedrooms or living room and other space in a store; it can be a partition separating space, in particular shelves, for example totems or a fitting room.

Lighting can be decorative on one side and functional on the other. For a cupboard door or a door - preferably a mirror door - for bathroom furniture, the light on the outside can be colored and the inside on white.

For each side (or space), the color can change depending on the time of day (or season) as well as the intensity. The control of the sources (on each side) can be automatic and / or manual.

The lighting can be dynamic on one side and static on the other.

The luminous glass assembly can for example be used in a door or an access gate (swiveling or sliding). The optical isolator combined with the extraction means (in particular the extraction means being a function of the masking coating) guarantee the independence of the two lights, particularly switchable to form the signage for an access door:

- at time tO: access color, such as green, on the first side and waiting color, such as red, on the second side

- at time t ’: signaling reversal, stop color on the first side and passage color on the second side.

Consequently, the invention also relates in particular to an access door or gate incorporating the luminous glazed assembly of the invention, in particular between the exterior and a building, between two zones of a building or of a land vehicle , maritime, rail or aeronautical, within a public transport station, between two exterior zones.

The invention also relates in particular to a partition, slab, window incorporating the luminous glazed assembly of the invention.

The present invention is now described using examples which are only illustrative and in no way limit the scope of the invention, and from the attached illustrations, in which:

Figures 1 to 6 show schematic sectional and partial views of six embodiments of a luminous glazed assembly according to the invention;

FIG. 7 illustrates an example of use of a luminous glazed assembly of the invention, in particular according to the exemplary embodiment of FIG. 4, in access gates.

The figures are schematic and are not to scale to facilitate reading.

Each of the luminous glass assemblies 100 to 600, taken as examples and illustrated in FIGS. 1 to 6, according to the invention comprises a first transparent element 2 mechanically rigid, a second transparent element 3 spaced apart and parallel to the first rigid element 2 mechanically, an optical isolator 4, light sources 5 and 6 respectively associated with the edge of the two transparent elements 2 and 3, and first and second light extraction means 7, 7 'associated respectively with the first and second elements transparencies 1 and 2 at the interior of the assembly.

Each of the luminous glass assemblies 100 to 600 comprises two opposite general faces which correspond to the external faces 20 and 30, respectively, of the two opposite transparent elements 2 and 3, and a peripheral section, at the level of at least one side of which are arranged. the light sources 5 and 6 which deliver light opposite, respectively, of each of the sections 21, 31 of the respective transparent elements 2 and 3, the light being guided inside the transparent elements and emerging by each of the main faces external 20 and 30 thanks to the light extraction means 7, 7 '.

A luminous glazed assembly 100 to 600, such as the assembly 200, is intended to be used for example in a set of access gates 1000 as illustrated in FIG. 7, to illuminate or display a luminous pattern 11 on at minus one of the faces of said assembly so that the lighting of one of the faces does not disturb the lighting of the other face.

Thus, the transparency of the glazed assembly when none of the light sources illuminates, allows, when one is positioned on one side of the assembly, to see through said assembly and therefore to see on the other hand, and moreover, the assembly of the invention ensures obtaining at least a single illumination on one of the faces, or two distinct illuminations on each opposite face of said assembly when the light patterns and / or the length d The wave of light sources are different, as if an opaque virtual barrier separates the two transparent elements preventing light from one element from crossing towards the other element.

This performance is obtained via the light extraction means 7, 7 ’and the optical isolator 4 which is advantageously according to the invention, formed of a gas layer such as an air layer.

The transparent elements 2 and 3 each have a refractive index n such that n- n, which is at least equal to 0.3, preferably of the order of 0.5, n, being the index of the optical isolator 4 For a glass substrate, the index n is 1.5, while the gas index 4 is 1.

In the various non-limiting exemplary embodiments of FIGS. 1 to 6, only the constitution of the transparent elements 2 and 3 differs and possibly the positioning of the extraction means with their masking coating, as detailed below, the optical isolator 4 being always a gas slide.

The transparent elements 2 and 3 each consist of one or more rigid transparent substrates stacked and possibly of sheet (s) / plastic film.

The gas slide is created by spacing the transparent elements 2 and 3 in parallel using spacing means 40.

The gas plate 32 has a preferred thickness between 0.5 and 2 mm. A thickness beyond 2 mm is not preferred because a depth effect is created for the assembly and the first and second extraction means when they are aligned (in a plane perpendicular to the main faces of the transparent elements ) are no longer hidden from one another under certain viewing angles.

The gas slide is preferably made of air. A rare gas such as argon, krypton, xenon, used to reinforce the thermal insulation of an insulating glazing is not at all necessary in an application for luminous glazed assembly which is not intended to also constitute glazing insulating.

The spacing means 40 comprise a spacer 41 fixed by adhesive fixing and sealing means 42 to the internal faces 22 and 32 of the respective transparent elements 2 and 3, and preferably an additional sealing and sealing means 43.

The spacer 41 is here of generally parallelepiped shape.

The spacer has a width, dimension transverse to the main faces of the transparent elements, equivalent to the desired spacing of said transparent elements.

By way of example, the spacer is a SWISSPACER® spacer sold by the Applicant. It has a body with a substantially rectangular section. The body is made of thermoplastic material, such as acrylonitrile styrene (SAN) or polypropylene, and reinforcing fibers, such as glass, which are mixed with the thermoplastic material. The body is hollow and houses the desiccant. The spacer has a width adapted to the spacing of the transparent elements, namely preferably much less than 4 mm, preferably at most 2 mm.

The spacer 41 is fixed by gluing using the adhesive means 42 arranged at the interface between each fixing face of the spacer and respectively each internal face 22 and 32 of the respective transparent elements 2 and 3. The adhesive means 42 are for example made of butyl and further provides gas and water vapor tightness.

A sealing means 43 such as putty is added against the external face of the spacer opposite the gas plate 4, and between the transparent elements 2 and 3 while being coplanar with the edge / edge of the transparent elements. This sealant is waterproof. It is for example made of polyurethane, or polysulfide or silicone.

The arrangement of the spacer, its depth (direction perpendicular to the thickness), the nature of its material, the type of adhesive means of the spacer, are adapted to avoid the transmission of light from a transparent element to the 'other.

The first and second light extraction means 7, 7 ’are associated for the majority of the embodiments with an internal face, respectively of the first and second transparent elements. The light extraction means 7, 7 ’can also be associated with an external face of a transparent element as will be seen below.

The light extraction means 7, 7 ′ comprise a first coating 70, 70 ′ called extraction coating and at least one second coating 71, 71 ′, said masking coating covering congruently the extraction coating 70, 70 '. In known manner, the extraction coating 70, 70 'allows the light to be reflected in a direction opposite to the surface carrying said extraction coating 70, 70', while the masking coating 71, 71 'participates at this reflection and prevents transmission of the non-reflected light through said masking coating 71, 71 'by absorption.

In most embodiments, the light extraction means 7, 7 'are arranged so that the extraction coating 70, 70' is directly attached to the internal face of a substrate, face facing the 'inside the assembly, the masking coating 71, 71' covering congruently the extraction coating 70, 70 'opposite the substrate. However, in an embodiment illustrated in FIG. 6 and detailed below, the first extraction means 7, 7 'are such that the extraction coating 70, 70' is integral with the substrate on the external face, face turned towards outside the assembly, the masking coating 71, 71 'covering congruently opposite the substrate the extraction coating 70, 70'.

By way of nonlimiting example, the extraction coating 70, 70 'is a white enamel, while the masking coating 71, 71' is a black enamel, when the substrate supporting the extraction means is a tempered glass substrate.

The extraction means 7, 7 ’do not cover the entire surface of the substrate. Their arrangement, distribution and size are configured to provide a pattern that will be bright when the light sources associated with the substrate are active. This pattern is associated with the clear view of the glass assembly while remaining discreet when the light sources are not active.

The light sources 5 and 6 are preferably a series of inorganic light-emitting diodes (LEDs) 50, respectively 60, aligned on a PCB support 51, respectively 61.

The light sources 5 and 6 are optically coupled to the edge of the transparent element. The LEDs can be side emitting as shown in Figure 3, or front emitting as shown in the other figures.

The PCB support 51, 61 is individual for each transparent element 2, 3, or is wider by being common and coupled to the edge of the two transparent elements.

The LEDs are aligned along the length of a slice of the glass assembly.

The LEDs may or may not emit with the same wavelength.

The LEDs can emit all simultaneously or some only. They can emit intermittently, for example flash or emit at specific times.

The emission of LEDs will in fact depend on the intended application.

The PCB supports 51 and 61 are housed and fixed, for example by gluing inside a profile 8, for example in the shape of a U. The profile has a non-transparent wall. The profile is for example metallic. The profile is associated with the edge of the glazed element 1 by fitting the wings 82 and 82 'of the U against the external faces 20 and 30 of the transparent elements 2 and 3, and preferably being fixed thereto by gluing via adhesive means 80.

The base 81 of the profile has a width at least equal, and here greater than the spacer and its fixing and sealing means.

The fixing profile comprises at least one partition (not transparent) between the first light sources 5 and the second light sources 6 in order to separate the light emission from the first and second light sources. The partition or partitions extend from the base of the profile 81 and perpendicular to said base until the edge of the assembly. For a frontal emission (figure 1, 2, and 4 to 6), the profile has a partition 83. For a lateral emission (figure 3), the profile has two partitions 84 and 84 'which are also used to support the PCB supports respective light sources 5 and 6.

Several embodiments are now described, without being exhaustive, with reference to the figures which are not to scale. Each embodiment is distinct in the constitution of the transparent elements 2 and 3 and / or in the arrangement of the extraction means 7, 7 ’. In the installed position of the assembly in its final destination, the first and second light sources 5 and 6 can be lit simultaneously or not.

In figure 1:

The transparent elements 2 and 3 each consist of a single substrate 23, 33 made of transparent material, for example glass. By way of example, each glass substrate 2, 3 has a thickness of 6 mm, and the thickness of the gas plate 4 is 1 mm.

The substrate is made of tempered glass because the light extraction means 7, 7 ’have been screen printed.

The first light extraction means 7 are arranged on the internal face 22 of the first transparent element 2 (the glass substrate 23). ). The extraction coating 70 is in contact with the face of the substrate 22. The masking coating 71 is congruent with the extraction coating 70, and is opposite the gas plate.

The second light extraction means 7 ′ are arranged on the internal face 32 of the second transparent element 3 (the glass substrate 33). The extraction coating 70 ′ is in contact with the face of the substrate 32. The masking coating 71 ′ is congruent with the extraction coating 70, and is opposite the gas plate.

The first extraction means 7 of the first transparent element 2 are aligned along planes perpendicular to the main faces, with the second extraction means 7 'of the second transparent element 3, so that the masking coatings 70, 70' of the first and second extraction means are opposite. In aligned arrangement of the extraction means 7, 7 ’, the pattern of one of the faces of the assembly is identical to the pattern of the opposite face. When the light sources are not working, we see only one and the same pattern from each side. When the two light sources 5 and 6 operate, and their color is different, the colors of each external face 20, 30 are distinct and do not mix, due to the gas slide 4 acting as a barrier, the alignment extraction means (alignment of the patterns), and the presence of the masking coatings 71, 71 '.

Note that in this exemplary embodiment, masking means 9, 9 ′, such as a peripheral strip whose material is adapted to absorb light (avoid the transmission of light), are arranged at the periphery of each of the first and second transparent element 2 and 3, near the spacer 40 in order to hide the spacer even better, if need be, the frame 8 may not be sufficient. These masking means 9, 9 ’are for example black enamel. They are preferably arranged on the main internal faces 22 and 32 of the first and second respective transparent elements 2 and 3. During the manufacture of each of the transparent elements with their extraction means 7, 7 ′ the masking means 9, 9 'can, to facilitate manufacturing, advantageously be constituted by extraction means 7, 7' formed by an extraction coating 70, 70 'and especially a masking coating 71, 71', the masking coating 71, 71 'constituting the masking means 9, 9'.

In figure 2:

The transparent elements 2 and 3 each comprise a transparent substrate 23, 33, and a transparent protective plastic sheet 24, 34, disposed on the outside of each element, being glued to the external face 20, 30 of the transparent substrate 23, 33 in glass.

By way of example, each glass substrate 2, 3 has a thickness of 6 mm, and the thickness of the gas plate 4 is 1 mm.

The transparent protective plastic sheet 24, 34 is for example made of polyester by being bonded with an acrylic adhesive, such as the product S600 from the company 3M. The protective plastic sheet has in particular a thickness of 0.15 mm. The protective plastic sheet 24, 34 provides security in the event of breakage of the glass substrate 23, 33.

The first light extraction means 7 are arranged on the internal face 22 of the first transparent element 2 (the glass substrate 23). The extraction coating 70 is in contact with the face of the substrate 22. The masking coating 71 is congruent with the extraction coating 70, and is opposite the gas plate.

The second light extraction means 7 ′ are arranged on the internal face 32 of the second transparent element 3 (the glass substrate 33). The extraction coating 70 ′ is in contact with the face of the substrate 32. The masking coating 71 ′ is congruent with the extraction coating 70 ’, and faces the gas plate.

The first extraction means 7 of the first transparent element 2 are aligned along planes perpendicular to the main faces, with the second extraction means 7 'of the second transparent element 3, so that the masking coatings 70, 70' of the first and second extraction means are opposite. In aligned arrangement of the extraction means 7, 7 ’, the pattern of one of the faces of the assembly is identical to the pattern of the opposite face. When the light sources are not working, we see only one and the same pattern from each side. When the two light sources 5 and 6 operate, and their color is different, the colors of each face 20, 30 are distinct and do not mix.

In figure 3:

The assembly corresponds to that of FIG. 2 except that the protective sheet here referenced 25, 35 is secured, not to the external face 20, 30, but to the internal face 22, 32 by covering the extraction means 7 , 7 '. The extraction coating 70, 70 'is in contact with the face of the substrate 22, 32. The masking coating 71, 71' is in congruence with the extraction coating 70, 70 'and is opposite the blade of gas.

In the modes of FIGS. 2 and 3, the protective plastic sheet may, as a variant of the polyester, consist of an EVA or PVB plastic sheet, the sheet being made integral by a conventional lamination process by adding during lamination with a counter -glass, an additional film which is only provisional. Thus, the glass substrate of the invention is placed on which the PVB or EVA sheet is deposited, then the provisional film of polytetrafluoroethylene (PTFE) and of thickness for example of the order of 50 μm, and finally a counter glass; the assembly is put in an autoclave or an oven, then thanks to the temporary film which is not glued to the protective sheet of PVB or EVA, the counter glass and the temporary film are removed to leave only the glass substrate and the protective sheet secured to the substrate after autoclaving.

In the embodiments of Figures 1 to 3, the first and second extraction means 7, 7 'are perfectly aligned. Alternatively, the first extraction means 7 of the first transparent element 2 may not be aligned with the second extraction means 7 'of the second transparent element 3, so that the masking coatings 70, 70' of the first and second extraction means 7, 7 'are not opposite. The first extraction means 7 of the first transparent element 2 by being offset with the second extraction means 7 ’of the second transparent element 3 provide a staggered pattern on each of the faces. When the light sources do not work, we can see from one of the faces of the assembly, for example from the external face of the first transparent element, the part of the pattern on the other face (of the second transparent element) which is therefore not opposite the reason for the first element. When the light sources illuminate the two transparent elements, the patterns are distinct without mixing color due to the gas layer acting as a barrier.

In figure 4:

The first and second transparent elements 2 and 3 are laminated elements. Each of the elements comprises an external transparent substrate 23, 33 made of glass, an internal transparent substrate 26, 36, preferably made of glass, and a transparent interlayer film of plastic material 27, 37, for example made of PVB or EVA. By laminating the outer glass substrate 23, 33, this provides a safety function in the event of breakage of one or more transparent elements, the broken glass remaining stuck to the interlayer film (s) 27 and / or 37.

The thickness of the exterior and interior substrates may or may not be the same. Preferably, the inner substrate 26, 36 will be thinner. For example, the thickness of each external substrate 23, 33 is 4 mm, while that of the internal substrate 26, 36 is 3 mm, the interlayer 27, 37 having a thickness of 0.38 or 0 , 76 mm.

The thickness of the gas slide 4 is 1 mm.

The first and second light extraction means 7, 7 'are integral with the internal face 23A, respectively 33A, of the external substrate 23, respectively 33. The extraction coating 70, 70' is in contact with the internal face 23A , 33A of the interior substrate. The masking coating 71, 71 ′ is congruent with the extraction coating 70, 70 ’and is opposite the inner substrate 26, 36 facing the gas plate 4.

In this embodiment, the first and second light extraction means 7, 7 ’are offset. They can alternatively be aligned.

When the light sources do not work, we can see from one of the faces of the assembly, for example from the external face of the first transparent element, the part of the pattern on the other face (of the second transparent element) which is therefore not opposite the reason for the first element. When the light sources illuminate the two transparent elements, the patterns are distinct without mixing color due to the gas layer acting as a barrier.

In figure 5:

As in Figure 4, the first and second transparent elements 2 and 3 are laminated elements. Each of the elements comprises an external transparent substrate 23, 33 made of glass, an internal transparent substrate 26, 36, preferably made of glass, and a transparent interlayer film of plastic material 27, 37, for example made of PVB or EVA. By laminating the outer glass substrate 23, 33, this provides a safety function in the event of breakage of one or more transparent elements, the broken glass remaining stuck to the interlayer film (s) 27 and / or 37.

The thickness of the exterior and interior substrates may or may not be the same. Preferably, the inner substrate 26, 36 will be thinner. For example, the thickness of each external substrate 23, 33 is 4 mm, while that of the internal substrate 26, 36 is 3 mm, the interlayer 27, 37 having a thickness of 0.38 or 0 , 76 mm.

The thickness of the gas slide 4 is 1 mm.

The first and second light extraction means 7, 7 ′ are integral, on the other hand, with the internal face 26A, respectively 36A, of the internal substrate 26, respectively 36. The extraction coating 70, 70 'is in contact with the face internal 26A, 36A of the internal substrate. The masking coating 71, 71 ′ is congruent with the extraction coating 70, 70 ’and is opposite and in contact with the gas slide 4.

In this embodiment, the light extraction means 7, 7 ’are aligned. They can alternatively be offset.

In aligned arrangement of the extraction means 7, 7 ’the pattern of one of the faces of the assembly is identical to the pattern of the opposite face. When the light sources are not working, we see only one and the same pattern from each side. When the light sources illuminate the two transparent elements, and their color is different, each pattern of a given color is visible only from one side, without mixing color due to the gas layer acting as a barrier and the alignment of the extraction means (alignment of the patterns).

In figure 6:

Extraction is only desired from one side of the assembly.

The first and second transparent elements 2 and 3 correspond to the elements described in FIG. 2, each comprising a transparent substrate 23, 33, and a transparent protective plastic sheet 24, 34, disposed outside of each element, in being bonded to the external face 20, 30 of the transparent glass substrate 23, 33.

The first light extraction means 7 are arranged on the external face 20, of the first transparent element 2 (the glass substrate 23). The extraction coating 70, in particular a white enamel, is in contact with the face of the substrate 22. The masking coating 71 (black enamel) is congruent with the extraction coating 70, and is facing the environment. exterior and covered by the protective sheet 24. As a variant, the first light extraction means 7 may comprise only the masking coating 71 arranged directly on the external face 20 of the first transparent substrate 23.

The second light extraction means 7 ′ are arranged on the internal face 32 of the second transparent element 3 (the glass substrate 33). The extraction coating 70 ′ is in contact with the face of the substrate 32. The masking coating 71 ′ is congruent with the extraction coating 70 ’, and faces the gas plate.

The first extraction means 7 of the first transparent element 2 are offset with respect to the second extraction means 7 ’of the second transparent element 3.

When the light sources 5 and 6 do not work, two distinct dark patterns are seen from each of the faces 20 and 30. When the two light sources 5 and 6 illuminate at the same time with a first color and a second distinct color respectively, color patterns are visible only from the external face 30 of the second transparent element 3. Thus, will be visible from the second element transparent 3, the color patterns formed by the first extraction coatings 70 'of said first transparent element 2 and according to the first color, and the color patterns formed by the second extraction coatings 70' of said second transparent element 3 and according to the second color, the two colors, respectively of the first patterns 70 and of the second patterns 70 ′, not mixing even if the first and second patterns are close to each other.

Claims (18)

1. Luminous glazed assembly (100, 200, 300, 400, 500, 600) comprising at least first and second transparent elements (2, 3) ensuring the mechanical rigidity of said assembly, the first transparent element (2) comprising at least one first substrate (23) of glass or plastic and the second transparent element (3) comprising at least a second substrate (33) of glass or plastic, a first light source (5) optically coupled to the first transparent element (2 , 3) forming a light guide, a second light source (6) optically coupled to the second transparent element (2, 3) forming a light guide, and first and second light extraction means (7, 7 ') guided associated respectively with each of said first and second transparent elements (2, 3), and an optical isolator (4) separating the first and second transparent elements (2, 3), characterized in that the optical isolator (4) e st a gas slide or vacuum and in that the first and second transparent elements (2, 3) are spaced from each other by spacing means (40) arranged on the periphery of the main internal faces of the first and second transparent elements. 2. luminous glazed assembly (100, 200, 300, 400, 500, 600) according to claim 1, characterized in that the optical isolator, in particular the gas plate (4), has a thickness of at most 20 mm , preferably at most 10 mm, or even preferably at most 5 mm. 3. luminous glass assembly (100, 200, 300, 400, 500, 600) according to claim 1 or 2, characterized in that the first light source (5) associated with the first transparent element (2) delivers light of length wave distinct from that of the second light source (6) of the second transparent element (3). 4. luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that it comprises peripheral masking means (9, 9 ') such as a strip adhesive of dark or black color, or a masking coating such as an enamel deposit, the masking means being at the periphery of the main internal faces of the first and second transparent elements, in particular extending opposite the edge of the first and second transparent elements beyond the spacing means over at least 2 millimeters or even up to 15mm. 5. luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the spacing means (40) comprise a spacer (41) which is secured by bonding by its faces arranged vis-à-vis with said internal main faces of the first and second transparent elements, the spacer being made of plastic or composite material, transparent or not, and / or based on a metallic material such as stainless steel, steel or aluminum, or even being made of glass, in particular the spacer is bonded via fixing means, such as a double-sided adhesive. 6. luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the spacing means (40) comprise a spacer (41) and in that the 'assembly comprises sealing means (42, 43), in particular to water, gas and water vapor, which are formed by means for fixing and / or sealing the spacer (41) to the main internal faces of the first and second transparent elements (2, 3), in particular the sealing means comprise, on the one hand, means for fixing the spacer by bonding forming a gas and vapor tight barrier d water such as butyl, and on the other hand a waterproof sealant sealant, such as polyurethane, or polysulfide or silicone, arranged between the transparent elements and on the external face of the spacer to the opposite of the optical isolator such as the gas slide. 7. luminous glass assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the first and second transparent elements (2, 3), in particular the first and second substrates, are made of extra clear glass. 8. luminous glazed assembly (200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the first substrate is made of glass (23) and the assembly comprises a transparent protective sheet (24 ; 25; 27), preferably of plastic material, which is in adhesive contact with the first glass substrate and covers said first glass substrate and preferably the second substrate is glass (33) and the assembly comprises a transparent sheet protective (34; 35; 37), preferably made of plastic, which is in adhesive contact with the second glass substrate and covers said second glass substrate. 9. luminous glass assembly (200, 300) according to any one of the preceding claims, characterized in that the first and second transparent elements (2, 3) each comprise a single glass substrate (23, 33), and a sheet transparent protection (24, 34; 25, 35) of plastic material covering and glued to the external main face of the glass substrate facing the external environment, or covering and glued to the internal main face of the glass substrate facing the optical isolator, in particular the transparent protective sheet having a thickness of at most 1.2 mm, and the transparent protective sheet being made of PVB or EVA being preferably secured to the internal main face of the transparent element, or else being made of polyester, in particular by being bonded with an acrylic adhesive, preferably being integral with the main external face of the transparent element. 10. luminous glazed assembly (400, 500) according to any one of claims 1 to 8, characterized in that the first and second transparent elements (2, 3) are made of laminated glass, in particular the assembly comprises on the one hand and on the other side of the optical isolator such as the gas slide (4), a first laminated glazing comprising a first glass substrate (23, 33) and another substrate (24, 34) made of glass or rigid plastic , and a second laminated glazing unit comprising a second glass substrate (23, 33) and an additional substrate (24, 34) made of glass or rigid plastic, the substrates of the first and second glazing units being integral with a transparent interlayer film in thermoplastic material, preferably PVB or EVA, in particular with a thickness of at most 1.2 mm. 11. luminous glass assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the first light extraction means (7) comprise a first extraction coating (70 ) of the light, and a first masking coating (71,) covers at least in congruence the first light extraction coating (70) and in that preferably the second light extraction means (7 ') comprise a second light extraction coating (70 '), and a second masking coating (71') at least congruently covers the second light extraction coating (70 '). 12. luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the first and second light extraction means (7, 7 ') are directly on the first and second substrates (23, 33) which are preferably tempered glass, in particular on the main internal faces of the first and second substrates, in particular an enamel. 13. luminous glazed unit (100, 200, 300, 400, 500) according to any one of the preceding claims, characterized in that each transparent element (2, 3) comprises one or more rigid substrates, preferably the first substrate being made of glass and the second substrate being made of glass, the first light extraction means (7) comprise a first light extraction coating (70) in direct contact with the preferably internal main face of the first substrate, and a first masking coating (71) covers at least congruence the first light extraction coating (70) and in that the second light extraction means (7 ') comprise a second extraction coating (70') light in direct contact with the main face, preferably internal, of the second substrate, and a second masking coating (71 ′) covers at least congruently the second extraction coating (70 ') from light. 14. An assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the first and second light extraction means (7, 7 ') are aligned in planes perpendicular to the main faces of the first and second transparent elements so as to provide two identical patterns facing each other on the faces of the transparent elements, or are offset. 15. An assembly (600) according to any one of claims 1 to 12, characterized in that the first light extraction means (7) of the first transparent element (2) are arranged on the main external face (20) of said first transparent element, and comprise a first light extraction coating (70), and a first masking coating (71) covers at least in congruence the first light extraction coating, the first extraction coating (70 ) being the coating in direct contact with said external main face (20), while the second light extraction means (7 ′) of the second transparent element (3) are arranged on the internal main face (32) of said second element transparent (3) and have a second light extraction coating (70 '), and a second masking coating (71') covers at least congruently the second extraction coating (70 ') mière, the second light extraction coating (70 ') being the coating in direct contact with said internal main face (32), the first light extraction means (7) and the second extraction means (7' ) of light being offset from each other. 16. Assembly according to any one of the preceding claims, characterized in that the first and second light sources (5, 6), preferably inorganic light-emitting diodes (50, 60), are arranged on one or more supports with a conductive circuit (51, 61) such as printed circuit boards, the supports being made integral with a profile (8) with a base (81) facing the edge and a wing (82, 82 ') according to at least an external side of the glazed assembly, the base of the profile being opposite or even wider than the spacing means (40). 17. Door or access door (1000) incorporating the luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, in particular between the exterior and a building, between two areas of a building or of a land, sea, rail or aeronautical vehicle, within a public transport station, between two exterior areas. 18. Partition, slab, window incorporating the luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of claims 1 to 16 6 g2 ’θθ