WO2018178595A1 - Light-emitting glazed assembly - Google Patents

Abstract

Light-emitting glazed assembly (100) including at least two transparent elements (2, 3), each including a single rigid substrate made of glass or made of rigid plastic or being laminated, two light sources (5, 6) that are optically coupled, in particular to the edge face, of the two transparent elements (2, 3), which form light guides, means (7, 7') for extracting the guided light, which means are associated with each of said transparent elements (2, 3), respectively, and an optical isolator (4) separating the two transparent elements (2, 3), characterized in that the optical isolator (4) is a vacuum or gas-filled cavity, such as an air-filled cavity, of thickness of at most 10 mm and in that the transparent elements (2, 3) are spaced apart from each other by spacing means (40) that are arranged in proximity to the edge face of the transparent elements, in particular a spacer (41), in particular formed of one or more parts, which parts are preferably arranged over the entire periphery of the assembly.

Description

 LUMINOUS GLASS ASSEMBLY

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

 It is known to form a luminous glazing by illuminating a glass by the wafer with a light source such as 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 provide via the diffusing pattern a continuous or flashing light zone or changing color.

 The Applicant has already proposed in patent WO20151 18280 to widen the range of available light glazings based on a light guide glass with illumination by the wafer by making possible the simultaneous vision of a first light zone of a first visible color of the light. 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 glazings, each of the glazings being associated with illumination means by the wafer and provided with means for extracting the light, and on the other hand at least one optical separator which is laminated by each of its opposite sides via a plastic interlayer to each of the two windows. The purpose of the optical separator is to separate at best the two distinct lighting colors in order to obtain the two respective colors of glazing. The optical separator is formed of a low index plastic film, such as a fluoropolymer.

 However, such an assembly requires a relatively long assembly process with regard to the cutting and the placement of the films and spacers. However, there is always a desire to simplify the manufacturing processes, while optimizing the optical results targeted in the final product, or even to improve them.

The invention therefore aims to provide a luminous glass unit that is simple to manufacture, without increasing the cost, and provides color rendering for each of the main faces of the lightest net and sliced possible, minimizing or even suppressing the effects of blurs and / or color mixing. According to the invention, the luminous glazed assembly comprises at least first and second transparent elements (rigid) 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) especially poly-methyl methacrylate (PMMA), and the second transparent element comprising at least a second substrate made of glass or plastic (rigid) including poly-methyl methacrylate (PMMA), a first light source optically coupled to the first transparent light guide element, in particular to the edge of the first transparent element, a second light source optically coupled to the second transparent light guide element, in particular to the edge of the second transparent element and first and second guided light extraction means respectively associated with each each of said first and second transparent elements, in particular each of the first and second light extracting means having an extraction coating which is covered (preferably directly on) at least in congruence by a masking coating, and a separating optical isolator the first and second transparent elements,

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

 The optical isolator, preferably the gas strip (especially air), has a thickness of at most 10 mm, preferably at most 5 mm, preferably even at most 2 mm.

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

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

The second rigid transparent element (second substrate in particular), in particular made of plastic, preferably has a thickness of at least 1 mm or at least 2 mm. Each transparent element has two opposite main faces and a peripheral edge connecting the two faces. The extraction of light is preferably performed from a main face.

 The optical isolator, that is to say the gas (especially air) blade or the vacuum, is obtained by spacing means arranged between the rigid transparent elements (in particular between the first and second substrates of FIG. glass). It is in particular the spacer formed of one or more pieces. The spacer forms a peripheral frame or forms at least two pieces 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 strip (or 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 to the gas plate or vacuum) which are preferably from more 20mm.

 Surprisingly, it turned out that by providing an optical isolator such as a gas blade, instead of a body / element / physical barrier, the color rendering was optimal, allowing a clear separation of the two colors visualized on each of the opposite faces of the set, without mixing colors, while providing an increased sharpness of each color, without blur effect that can sometimes provide a plastic optical isolator.

 In addition, the spacing means, in particular the spacer, provide mechanical cohesion of the first and second transparent elements and therefore of the assembly. The assembly thus forms a one-piece assembly, allowing easy handling of the assembly during its installation in its final destination, and guaranteeing a long-lasting structure as to its mechanical rigidity without affecting in time the optical isolator such as the gas blade. .

 In addition, the manufacturing method is simplified, and can even be of reduced cost, since it does not require, as in the prior art, to cut a specific plastic film (film in particular at low index) and to the appropriate dimensions, and to leaf through it, the lamination step of a low index film being delicate with an increased risk of defects resulting (folds of the film during the lamination, blur accentuated ....).

In the remainder of the description, "internal" is understood to mean a main face of a rigid transparent element or of a rigid substrate, the disposed face towards the inside of the assembly, and by "external", the outward facing face of the assembly.

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

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

 Preferably for the spacing means (in particular consisting of a spacer which is an adhesive tape and without additional sealant sealant), one or more of the following characteristics, which may be cumulative, are provided:

the spacing means, in particular comprising or consisting of a spacer, are all around the internal faces, or at least 80% or 90%,

 the spacing means, in particular comprising or consisting of a spacer, are set back from the edge of the first and second transparent elements of at most 10, better 5 mm, and even are flush with the edge of the first and second transparent elements

 in one or more zones, the spacing means are not masked (by a profile, a coating, etc.),

 the spacing means, in particular comprising or consisting of a spacer, are transparent, in particular are visible on all or part of their surface, for example are masked (only) close to the optical coupling zone between sources of light and slices first and second transparent elements.

the spacing means, in particular comprising or consisting of a spacer, are all around the internal faces, or at least 80% or 90%, and in one or more zones the spacing means are not masked (by a profile, a coating etc). the spacing means, in particular transparent, in particular comprising or consisting of a spacer, are of width of at most 20 mm and better at most 15 mm and even 10 mm and preferably at least 3 mm.

 Preferably, the spacing means comprise even consist of a spacer which is secured preferably by gluing by its faces disposed vis-a-vis with the inner main faces of the transparent elements, the spacer being glued by its two adhesive faces on said internal main faces of the first and second transparent elements.

 The spacer means, in particular comprising or consisting of a spacer, may be on the inner faces by being in contact with the internal faces (naked) or on the internal faces thus coated on the above-mentioned peripheral masking means. The spacing means can thus be bonded to the peripheral masking means which are masking coatings such as layers / deposits of enamel.

 In particular, the spacer may be a part which is glued via a transparent or opaque double-sided adhesive, possibly reflecting. In particular, the spacer is glued via transparent fixing means, such as a double-sided transparent adhesive or glue.

 The spacer can also be glued by its two adhesive faces to said internal main faces of the first and second transparent elements, for example the spacer is a double-sided adhesive tape (double-sided, quadriface, etc.).

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

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

 In particular, the spacer may be a double-sided adhesive, preferably transparent, in particular in the visible zone or zones of the glazed assembly in the upward or opaque position, arranged at the periphery of the internal principal faces of the first and second transparent elements. and preferably all around the inner faces.

The spacing means may comprise or even consist of a spacer which is an adhesive tape (double-sided, in particular quadriface) preferably transparent, arranged at the periphery of the internal main faces of the first and second transparent elements and preferably all around. internal faces. There is no need to use additional sealant (between the edge of the glazed element and the tape). For the spacer, an adhesive tape of calibrated thickness (and without risk of overflow) is preferred to a bead of adhesive.

 For example, an adhesive tape comprises a transparent polymeric support (polyester, PET, for example made of foam, in particular crosslinked polyolefin or not, etc.) with double-sided transparent adhesive, for example acrylic (modified for example) in particular sensitive to pressure.

 Alternatively, it may be an adhesive tape without a support (transfer ribbon), for example composed of a particular acrylic adhesive sensitive to pressure. The spacing means may comprise a spacer and the assembly (luminous glazed) may comprise sealing means, in particular water and / or gas and water vapor, which are formed by means of fixing and / or sealing the spacer to the inner main faces of the first and second transparent elements. In particular, the sealing means comprise, on the one hand, means for fastening the spacer by gluing (the adhesive fastening means being disposed at the interface between the spacer and the internal main faces of the first and second elements transparent), said fixing means forming a gas-tight barrier and water vapor such as butyl, and secondly a sealant sealant, such as polyurethane, or polysulfide or silicone , arranged between the first and second transparent elements (their inner main face) and on the outer face of the spacer opposite the optical isolator such as the gas blade (or vacuum).

An example of a spacer has a rigid base body made of a thermoplastic material, such as styrene acrylonitrile (SAN) or polypropylene, and preferably reinforcing fibers, such as glass, which are mixed with the thermoplastic material , as well as a sheet sealing the gas and water vapor bonded to the face intended to be the outer face of the spacer in the mounted position in the glazing (arranged opposite the gas blade) ). The base body is hollow and can also house a desiccant. Such a spacer, based on SAN and fiberglass, is known for example under the trade name SWISSPACER ^® of the Applicant when the base body of the sealing sheet is aluminum, and under the name SWISSPACER V ^® when the core body sealing sheet is 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, it may be preferred a glass spacer. The spacer may not be in the same material on the entire periphery of the glass unit.

 The spacer and the sealing means which may constitute sealing means, may be sufficient to perform the mechanical assembly of the two spaced transparent elements.

 Note that vacuum as an optical isolator is not preferred because the method of manufacturing a vacuum glazing is more complex than a glazing gas blade, and more expensive. In addition, a vacuum glazing involves the presence of a multitude of spacers, such as beads, which are distributed over the entire surface of the glass substrates, providing a possibly disturbed visual rendering 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 light transmission from one transparent element to the other via said spacing means and said securing means and sealing. The spacing means and the securing and sealing means have a depth (distance from the edge of the transparent elements towards the inside of the gas blade) which is adapted and limited to ensure the necessary mechanical function of spacing all by 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 of 4 mm thick . Preferably, the transparent elements are made of extra-clear glass, such as the DIAMANT® glass marketed 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 of plastics material, 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 security in the event of breakage of the glass, while retaining the pieces of glass.

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

 The assembly may comprise (for the first transparent element and even for the second transparent element), at least one transparent protective sheet which is made of PVB (polybutyral vinyl) or EVA (ethylene-vinyl acetate) then preferably integral with the inner main face of the transparent element which is preferably a glass substrate, or else of polyester, 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 a laminated glass pane / lamination / glass interlayer.

 In one embodiment, the first and second transparent elements each comprise a single glass substrate, and a transparent plastic protective sheet covering and bonding (via transparent glue) to the outer major surface of the glass substrate, external environment, or covering and glued to the inner main face of the glass substrate opposite the optical isolator such as the gas blade, in particular the transparent protective sheet having a thickness of at most 1, 2mm and the transparent protective sheet being made of PVB or EVA, preferably being integral with the inner main face of the transparent element, or else being made of polyester by being adhesively bonded with an acrylic adhesive, preferably being integral with the external main face. of the transparent element. Preferably, to avoid 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 laminated glass. Also, the assembly of the invention comprises on both sides of the optical isolator (in particular the gas strip), a first laminated glazing unit 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 made of glass or rigid plastics material, the substrates of the first and second glazings being integral with a transparent interlayer film made of thermoplastic material, preferably of PVB or EVA , in particular having a thickness of at most 1, 2 mm, in particular of 0.3 mm or 0.7 mm.

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 20 mm depending on the application. The thickness for a rigid plastic substrate can also be between 2 and 20mm.

 The realization of light extraction means is in itself known.

 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 -particularly at the level of the face opposite to that carrying said first extraction coating. A first masking coating covers (directly) at least congruently the first extraction coating, so as to prevent the light from passing through and out of 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 -particularly at the level of the face opposite to the one carrying said second extraction liner-, and a second masking liner covers (directly) at least congruently the second liner, so as to prevent light from passing through and out of the main surface glass bearing said second extraction means.

 The first masking coating is directly deposited on the first extraction coating is or secured to a support reported 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 secured to a support reported against the main face of the substrate carrying the second extraction coating.

 Preferably, the first and second light extraction means are (screen-printed in particular) respectively on the first and second substrates which are made of preferably tempered glass, in particular on the internal main faces of the first and second substrates, in particular an enamel.

 The first and the second light extraction coating is preferably an enamel or an ink or a paint, in particular the first and second light extraction coatings are on the inner major faces of the first and second substrates.

The (first as well as the second) light extraction coating is preferably white in color, defined by a L ^* clarity of at least 50. Preferably, the inorganic pigment is chosen so that it is white in color . This pigment is in particular TiO ₂ titanium oxide. Advantageously, this mineral pigment white 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.

Clarity L ^* can be measured under the conditions of the CIE Recommendation (1931) using a D ₆₅ illuminant, a 10 ° observer, in SCE mode (diffuse specular excluded) 8 ° diffuse (CM 600 Minolta).

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

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

 The (first and second) masking coating can be reflective.

 The (first as well as the second) opaque masking coating may be black or gray (dark) or even white (typically by thickening the extraction coating). The (first and second) opaque masking coating can be as colorful and thick enough to be opaque at all major wavelengths or opacity at some of the major wavelengths.

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

 The (first as the second) congruent masking coating and even (directly) 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 the pigments which make it possible to impart a black color. By way of examples, mention may be made of pigments based on chromium, iron, manganese, copper and / or cobalt, in particular in the form of oxides or sulphides. Although chromium-based pigments provide an intense black color, they are not preferred because of problems related to their potential toxicity and their recycling. Thus, preferably, the inorganic 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 inorganic pigment for masking may be of a different color than black, and is for example based on Cr ₂ 0 ₃ (green color), Co ₃ 0 ₄ (blue color), cobalt blue, based on iron oxide, Fe ₂ O ₃ (brown).

 The glass frit of the extraction coating is free of PbO lead oxide 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 Bi ₂ 0 ₃ contains 35 to 75% by weight of Si0 ₂ and 20 to 40% by weight of Bi ₂ 0 ₃ and preferably 25 to 30%. For example, the glass frit based on ZnO contains 35 to 75% by weight of Si0 ₂ and 4 to 10% by weight of ZnO.

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

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

 If the (first or second) extraction coating is in particular silkscreened on the inner face of the glass substrate, the (first or second) masking coating is directly deposited on it or not. In a variant, the (first or second) opaque masking coating, such as an ink, a paint or an enamel, in particular an ink (printed) or paint, is integral with the central lamination interlayer (inner or outer side). gluing) when the transparent element of the glass unit is a laminated glass, or integral with an additional support including plastic or mineral glass (flexible such as a (polyethylene terephthalate) said PET, or 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 such as the product Planilaque Evolution or Decolac of the applicant company laminated by 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 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 strip (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 means of extraction of light comprises a first light-extracting coating in direct contact with the preferably internal main face of the first substrate, and a first masking coating at least congruently covering the first extraction coating and the second extraction means of light comprise a second light extraction coating in direct contact with the preferably internal main face of the second substrate. 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 glass) including a first glazing said outer glazing in contact with the external environment, and a second glazing said glazing internal contact with the gas strip (or vacuum), the first and second light extraction means are disposed on the inner face of the inner substrate, preferably glass, that is to say vis-à-vis -vis the gas blade (or vacuum).

 The first and second light extraction means may 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 of the faces of the transparent elements, or may be shifted. 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 set 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 being mixed due to the barrier optics of the gas blade and the 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 shifted, from each face is observed the pattern associated with this face and the part or part of the pattern of the opposite face; when the first and second light sources emit in two distinct colors and the first and second extraction means are shifted, from each face is observed the associated pattern of the face with the color of the associated light sources without the colors of Both sides do not mix due to the optical barrier of the gas blade (and masking coatings).

In a particular embodiment, the first light extraction means of the first transparent element are arranged on the outer main face of said transparent element, and comprise a first light extraction coating, and a first masking coating covers at less in congruence 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 inner main face of said second element transparent and comprise a second light extraction coating, and a second masking coating at least congruently covers the second light extraction coating, the second light extraction coating being the coating in direct contact with said face main internal, the first light extraction means and the second light extraction means being offset with respect to 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 emission ("side emitting" in English), or front emission ("top emitting" in English).

 The assembly may comprise two supports with a conductive circuit or PCB supports which are spaced or abutted, or 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), metal (aluminum, copper, etc.). It is preferably of millimeter thickness (less than 10 mm preferably) or even at most 1 mm.

 The support or supports with a conductive circuit (PCB) are for example glued with a thermal glue to a metal or plastic profile, it-with a base facing the edge of the glass assembly, and wings that are for example glued to the main external faces of the glass unit.

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 secured to a profile with a base facing the wafer, and a wing according to at least one outer side of the glazed assembly (in particular the wing being secured to the outer 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 fastening section of the first and second light sources may be the mounting profile of the glazed assembly. It may have a U-shape or another shape as in E.

 Advantageously, the fastening section which houses the first and second light sources comprises at least one (non-transparent) partition wall between the first and second light sources. The partition or partition walls extend from the base of the profile and perpendicular to said base to 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 the arrangement, the extent and the 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 set or on only one face.

 In an exemplary embodiment, the extraction of light is obtained from the external faces of the first and second transparent elements facing the outside 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 light is obtained from a single main external face of the assembly, that is to say from the outer main surface of only the first or second transparent element, the face external being opposite the external environment, the first and second extraction means being offset relative 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 facing). We can have patterns that complement each other, for example as described in the patent application WO2016001597 of the Applicant.

 The luminous glazed assembly is intended to present a 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 bright display on the other side.

The term "luminous display" means the presence of a light or a luminous pattern, over 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 luminous intensity of the illuminated surface may voluntarily be inhomogeneous (surface) depending on the light extraction means. The luminous pattern will depend in particular on the distribution and geometry of the light extraction means.

 The areas between the extraction means are preferably transparent.

The invention aims in particular to form signs and / or light decorations (or even functional lighting) of distinct colors continuously or at a given moment on two distinct sides of the glass unit (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 unit between a first accessible space (with a pedestrian or vehicle traffic) and a second accessible space (with a pedestrian or vehicle traffic), for example a partition, a window or even a slab of soil on the floor ...

 In a signage application, for a train compartment, one may have written "free" in green on one side and "reserved" in red on the other side or for a separation between a family space or a classic space on can have families light side 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 offices, each person can choose his decor color.

 In a partition application between two spaces (building, outdoors, in a vehicle including public transport ..), each space can have one or more bright patterns of color, type of switching (and shape) adapted and a function adapted decorative or (more) functional (lighting).

 For example it can be a partition between two offices, between two rooms or living room and other space in a store; it may be partition wall space, including rays, for example totems or a fitting room.

 On one side, the lighting can be decorative and on the other functional side. For a closet door or door-preferably bathroom mirror-mirror, the outer side light can be colored and white inner side.

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

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

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

 at the instant t0: access color, such as green, of a first side and waiting color, such as red, of the second side

 at the instant t ': inversion of the signaling, stop color of the first side and color of passage of 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 a land vehicle. , maritime, railway or aeronautical, within a transit station, between two outer 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 with the aid of 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 glass unit 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 not scaled for ease of reading.

 Each of the luminous glazed assemblies 100 to 600, taken as examples and illustrated in FIGS. 1 to 6, comprises according to the invention a first transparent element 2 rigid mechanically, 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 'respectively associated with the first and second elements transparencies 1 and 2 at the inside of the assembly.

Each of the luminous glazed 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 edge, at the level of at least one side of which are arranged the light sources 5 and 6 which deliver light facing, respectively, each of the slices 21, 31 of the respective transparent elements 2 and 3, the light being guided inside the transparent elements and emerging through each of the main external faces 20 and 30 through the light extraction means 7, T.

 A luminous glazed assembly 100 to 600, such as 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 1 1 on at least one of the faces of said assembly so that the illumination of one of the faces does not disturb the illumination of the other face. Part of the edge of the glazed assembly is visible and the spacing means around the glass unit are preferably transparent because they are not masked.

 Thus, the transparency of the glass unit when none of the light sources illuminates, allows, when one is positioned on one side of the set, to see through said set and thus to see the other side, and moreover, the assembly of the invention ensures to obtain at least one lighting on one of the faces, or two distinct lighting on each opposite face of said set when the luminous patterns and / or the length of d The wave of the light sources are different, as if an opaque virtual barrier separated the two transparent elements preventing the light of one element from crossing in the direction of 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 blade such as an air knife.

 The transparent elements 2 and 3 each have a refractive index n such that n-n 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 index of the gas 4 is 1.

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

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

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

The gas strip 32 has a preferred thickness of at most 2 mm and for example at least 0.5 mm. A thickness beyond 2 mm is not preferred because a depth effect is created for the whole and the first and second extraction means when aligned (in a plane perpendicular to the main faces of the transparent elements) are no longer hidden by each other at certain viewing angles.

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

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

 The spacer 41 is here of parallelepipedic general shape.

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

For example, the spacer is a spacer SWISSPACER ^® marketed by the Applicant. It has a body with a substantially rectangular section. The body is made of thermoplastic material, such as styrene acrylonitrile (SAN) or polypropylene, and reinforcing fibers, such as glass, which are mixed with the thermoplastic material. The body is hollow and houses desiccant.

 The spacer 41 is fixed by gluing thanks to the adhesive means 42 arranged in interface between each fixing face of the spacer and respectively each inner 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 a seal to gases and water vapor.

 A sealing means 43 such as putty is added against the outer face of the spacer opposite to the gas strip 4, and between the transparent elements 2 and 3 being coplanar with the edge / edge of the transparent elements. This putty 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 prevent the transmission of light from a transparent element to the light. 'other. The first and second light extraction means 7, 7 'are associated for the majority of embodiments to an inner face, respectively of the first and second transparent elements. The light extraction means 7, 7 'may also be associated with an outer face of a transparent element as will be seen later. The light extraction means 7, 7 'comprise a first coating 70, 70' said 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 the transmission of non-reflected light through said masking coating 71, 71 'by absorption.

 In most embodiments, the light extraction means 7, 7 'are arranged in such a way that the extraction coating 70, 70' is integral with the internal face of a substrate, facing towards the outside. the interior of the assembly, the masking coating 71, 71 'congruently covering the extraction coating 70, 70' away from the substrate. However, in one 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 outer face, face turned towards the outside of the assembly, the masking coating 71, 71 'covering in congruence opposite the substrate the extraction coating 70, 70'.

 By way of non-limiting 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 black enamel. 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 will be active. This pattern is associated with the clear view of the glass unit 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 ("side emitting" in English) as shown in Figure 3, or front emission ("top emitting" in English) 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 unit. LEDs may or may not emit with the same wavelength.

 LEDs can emit all or some of them. They may intermittently emit, for example, flashing or emitting at specific times.

 The emission of the 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 U-shaped. 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 connecting the flanges 82 and 82 'of the U against the outer faces 20 and 30 of the transparent elements 2 and 3, and by being attached thereto preferably by adhesive bonding 80.

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

 The fixing profile comprises at least one partition (non-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 partition walls extend from the base of the section 81 and perpendicularly to said base to the edge of the assembly. For a frontal emission (FIGS. 1, 2, and 4 to 6), the profile comprises a partition 83. For a lateral emission (FIG. 3), the profile comprises two partitions 84 and 84 'which serve in addition to support the PCB supports respective light sources 5 and 6.

 Several embodiments are now described in a non-exhaustive manner with regard to the figures that 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 light concomitantly or not.

 In Figure 1:

 The transparent elements 2 and 3 each consist of a single substrate 23, 33 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 strip 4 is 1 mm.

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

The first light extraction means 7 are arranged on the inner 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 in congruence with the extraction coating 70, and is facing the gas slide.

 The second light extraction means 7 'are arranged on the inner 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 in congruence with the extraction coating 70, and is facing the gas strip.

 The first extraction means 7 of the first transparent element 2 are aligned in 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 facing each other. In aligned arrangement of the extraction means 7, 7 ', the pattern of one of the faces of the set is identical to the pattern of the opposite face. When the light sources do not work, 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 outer face 20, 30 are distinct and do not mix, because of the gas barrier blade 4, the alignment extraction means (pattern alignment), and the presence of masking coatings 71, 71 '.

 Note that in this exemplary embodiment, masking means 9, 9 ', such as a peripheral band whose material is adapted to absorb light (to avoid light transmission), are arranged on the periphery of each of the first and second transparent element 2 and 3, near the spacer 40 to hide if necessary even better the spacer, the frame 8 may not be sufficient. These masking means 9, 9 'are for example black enamel. They are preferably arranged on the inner main faces 22 and 32 of the respective first and second 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' may advantageously be made by extraction means 7, 7 'formed to 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 plastic protective sheet 24, 34, disposed outside each element, being bonded to the outer face 20, 30 of the transparent substrate. 23, 33 glass. By way of example, each glass substrate 2, 3 has a thickness of 6 mm, and the thickness of the gas strip 4 is 1 mm.

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

 The first light extraction means 7 are arranged on the inner 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 in congruence with the extraction coating 70, and is facing the gas strip.

 The second light extraction means 7 'are arranged on the inner 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 in congruence with the extraction coating 70 ', and is facing the gas strip.

 The first extraction means 7 of the first transparent element 2 are aligned in 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 facing each other. In aligned arrangement of the extraction means 7, 7 ', the pattern of one of the faces of the set is identical to the pattern of the opposite face. When the light sources do not work, 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 referenced 25, 35 is integral, not with the external face 20, 30, but with the internal face 22, 32 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 facing the gas.

In the modes of FIGS. 2 and 3, the plastic protection sheet may alternatively be made of a plastic sheet EVA or PVB, the sheet being secured by a conventional lamination process by adding laminating with a counter-glass, an additional film that is only temporary. Thus, the glass substrate of the invention is placed on which the PVB or EVA sheet is deposited, then the temporary polytetrafluoroethylene (PTFE) film, of thickness for example of the order of 50 μηη, and finally a counter glass; the whole is put in an autoclave or oven, then thanks to the temporary film which is not glued to the PVB or EVA protection film, the counter-glass and the provisional film are removed leaving only the glass substrate and the protective sheet integral with 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 being offset with the second extraction means 7 'of the second transparent element 3 provide a pattern offset on each of the faces. When the light sources do not work, it is possible to see from one of the faces of the assembly, for example from the outer face of the first transparent element, the part of the pattern of the other face (of the second transparent element) which is therefore not next to the motif of the first element. When the light sources illuminate the two transparent elements, the patterns are distinct without color mixing due to the barrier gas strip.

 In Figure 4:

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

 The thickness of the outer and inner substrates may be identical or different. Preferably, the inner substrate 26, 36 will be thinner. For example, the thickness of each outer substrate 23, 33 is 4 mm, while that of the inner substrate 26, 36 is 3 mm, the spacer 27, 37 having a thickness of 0.38 or 0. , 76 mm.

 The thickness of the gas strip 4 is 1 mm.

The first and second light extraction means 7, 7 'are integral with the inner face 23A, respectively 33A, of the outer substrate 23, respectively 33. The extraction coating 70, 70 'is in contact with the inner face 23A, 33A of the inner substrate. The masking coating 71, 71 'is in congruence with the extraction coating 70, 70' and is facing the inner substrate 26, 36 facing the gas strip 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, it is possible to see from one of the faces of the assembly, for example from the outer face of the first transparent element, the part of the pattern of the other face (of the second transparent element) which is therefore not next to the motif of the first element. When the light sources illuminate the two transparent elements, the patterns are distinct without color mixing due to the barrier gas strip.

 In Figure 5:

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

 The thickness of the outer and inner substrates may be identical or different. Preferably, the inner substrate 26, 36 will be thinner. For example, the thickness of each outer substrate 23, 33 is 4 mm, while that of the inner substrate 26, 36 is 3 mm, the spacer 27, 37 having a thickness of 0.38 or 0. , 76 mm.

 The thickness of the gas strip 4 is 1 mm.

 The first and second light extraction means 7, 7 'are secured against the inner face 26A, respectively 36A, of the inner substrate 26, respectively 36. The extraction coating 70, 70' is in contact with the face internal 26A, 36A of the inner substrate. The masking coating 71, 71 'is in congruence with the extraction coating 70, 70' and is facing and in contact with the gas strip 4.

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

In aligned arrangement of the extraction means 7, 7 'the pattern of one of the faces of the set is identical to the pattern of the opposite face. When the light sources do not work, 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 a single face, without color mixing due to the gas barrier blade and the alignment of the extraction means (pattern alignment).

 In Figure 6:

 It is desired to extract only 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 plastic protection sheet 24, 34, disposed outside each element, in being bonded to the outer face 20, 30 of the transparent substrate 23, 33 of glass.

 The first light extraction means 7 are arranged on the outer 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 in congruence with the extraction coating 70, and is facing the environment outside and covered by the protective sheet 24. Alternatively, the first light extraction means 7 may comprise only the masking coating 71 arranged directly on the outer face 20 of the first transparent substrate 23.

 The second light extraction means 7 'are arranged on the inner 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 in congruence with the extraction coating 70 ', and is facing the gas strip.

 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 respectively a first color and a second distinct color, are visible color patterns only from the outer face 30 of the second transparent element 3. Thus, will be visible from the second element 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 second patterns 70 ', not mixing even if the first and second patterns are close to each other. As an alternative to the spacing means presented in the embodiments, it is possible to choose a preferably transparent double-sided adhesive tape.

The adhesive strip is all around and preferably wide at most 15 mm and blooming at the edge of the transparent elements 2, 3.

 The adhesive tape is for example a transparent polymeric support

(polyester, PET, for example made of polyolefin foam or crosslinked or not etc.) with double-sided acrylic glue (modified for example) particularly sensitive to pressure as the product called D9605 NITTO company or other bands double face of the company NITTO or the company TESA. Alternatively, it may be an adhesive tape without a support (transfer ribbon), for example composed of an adhesive, especially acrylic pressure-sensitive adhesive, for example from the company NITTO.

Claims

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 a first substrate (23) made of glass or plastic and the second transparent element (3) having at least a second substrate (33) made of glass or plastic material, 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 light guide element (2, 3), and first and second guided light extraction means (7, 7 ') respectively associated 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) is a gas core or vacuum and in that the first and second transparent elements (2, 3) are spaced from each other by spacing means (40) arranged at the periphery of the inner major faces of the first and second transparent elements, the optical isolator (4) having a thickness of at most 10 mm.  2. Luminous glazed assembly (100, 200, 300, 400, 500, 600) according to claim 1, characterized in that the thickness of the optical isolator (4) is at most 5 mm.  3. Luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the thickness of the optical isolator is at most 2 mm.  4. Luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the optical isolator (4) is a blade of gas, including air.  5. luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the first light source (5) associated with the first transparent element (2) delivers a light of wavelength distinct from that of the second light source (6) of the second transparent element (3). 6. Luminous glazing unit (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 on the periphery of the internal main faces of the first and second transparent elements, in particular by extending opposite the singing of the first and second transparent elements beyond the spacing means over at least 2 millimeters or even up to 15mm.  7. Luminous glazing unit (100, 200, 300, 400, 500, 600) according to any one of the preceding claims, characterized in that the spacing means (40) possibly transparent, comprise a spacer (41) which is secured by bonding by its faces disposed vis-a-vis with said internal main faces of the first and second transparent elements, the spacer being of plastic or composite material, transparent or not, and / or based on a metallic material such as in stainless steel, steel or aluminum, or even in glass, in particular the spacer is glued via fastening means, such as a double-sided adhesive or glue, the spacer can be glued by its two adhesive faces on said internal main faces of the first and second transparent elements.  8. Luminous glazed assembly according to any one of the preceding claims, characterized in that the spacing means (40) comprise or consist of a spacer which is an adhesive tape including a polymeric support, preferably transparent with double-sided glue preferably transparent adhesive tape secured by its faces disposed on said internal main faces of the first and second transparent elements, on the inner major faces of the first and second transparent elements, preferably transparent adhesive tape, the adhesive strip being at least two-sided, preferably arranged at the periphery of the inner major faces of the first and second transparent elements and all around the inner faces.  9. Luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of claims 1 to 7, characterized in that the spacing means (40) comprise a spacer (41) and in that the assembly comprises sealing means (42, 43), in particular with water, with gases and with water vapor, which are formed by means for fixing and / or sealing the spacer ( 41) to the inner main 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 gluing forming a gas-tight barrier and on the water vapor such as butyl, and secondly a sealant sealant, such as polyurethane, or polysulfide or silicone, arranged between the transparent elements and on the outer face of the spacer to the opposite of the optical isolator such as the gas slide. 10. Luminous glazed 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. 1 1. A luminous glazed unit (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; 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 protective sheet (34; 35; 37), preferably of plastic material, which is in adhesive contact with the second glass substrate and covers said second glass substrate.  12. Luminous glazed unit (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 transparent protective sheet (24, 34; 25, 35) of plastics material coated and bonded to the outer major face of the glass substrate facing the external environment, or covering and bonded to the inner main face of the glass substrate opposite 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 integral with the inner main face of the transparent element, or being made of polyester, in particular by being bonded with an acrylic adhesive, preferably being secured to the outer main face of the transparent element.  13. Luminous glazed assembly (400, 500) according to any one of claims 1 to 1 1, characterized in that the first and second transparent elements (2, 3) are laminated glass, in particular the assembly comprises of and other of the optical isolator such as the gas strip (4), a first laminated glazing unit comprising a first glass substrate (23, 33) and another substrate (24, 34) made of glass or plastic rigid, and a second laminated glazing comprising a second glass substrate (23, 33) and an additional substrate (24, 34) made of glass or rigid plastic material, the substrates of the first and second glazings being integral with a transparent interlayer film thermoplastic material, preferably PVB or EVA, in particular with a thickness of at most 1.2 mm. 14. Luminous glazing unit (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 internal main faces of the first and second substrates, in particular the first and second light extraction means (7, 7 ') are enamel . 15. Luminous glazing unit (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,) at least congruently covers the first light extraction coating (70) and that preferably the second light extraction means (7 ') comprises a second extraction coating (70 ') of the light, and a second masking coating (71') at least congruently covering the second light extraction coating (70 ').  16. Luminous glazing 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 extraction coating (70) of the light in direct contact with the preferably internal main face of the first substrate, and a first masking coating (71) at least congruently covers the first light extraction coating (70) and in that the second light extraction means (7 ') comprises a second extraction coating (70') light in direct contact with the preferably inner major face of the second substrate, and a second masking coating (71 ') at least congruently covering the second light extraction coating (70').  17. The 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 of the faces of the transparent elements, or are offset. 18. Assembly (600) according to any one of claims 1 to 14, characterized in that the first light extraction means (7) of the first transparent element (2) are arranged on the outer main face (20) of said first transparent element, and comprise a first light extraction coating (70), and a first masking coating (71) at least congruently covering the first light extraction coating, the first extraction coating (70), ) being the coating in direct contact with said outer main face (20), while the second light extraction means (7 ') of the second transparent element (3) are arranged on the inner main face (32) of said second element transparent (3) and have a second light extraction coating (70 '), and a second masking coating (71') at least congruently covering the second extraction coating (70 ') of light, the second light extraction coating (70') being the coating in direct contact with said inner main face (32), the first light extracting means (7) and the second extraction means (7 ') of light being offset with respect to each other.  Arrangement according to 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 secured to a profile (8) with a base (81) facing the edge and a flange (82, 82 ') according to at least an outer side of the glass unit, the base of the profile being opposite or even wider than the spacing means (40).  20. Door or access gate (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 zones of a land, sea, rail or aeronautical building or vehicle, within a public transport station, between two outer zones.  21. Partition, slab, window incorporating the luminous glazed assembly (100, 200, 300, 400, 500, 600) according to any one of claims 1 to 19.