Illuminatable laminated glass element of a vehicle, vehicle with such an illuminable laminated glass element

Abstract

The invention relates to an illuminable laminated vehicle glass element with a transparent non-fluoropolymer film within the lamination interlayer coated with both an optical insulating coating and a functional coating based on silver layer(s). Figure 1

Description

Title of the invention: Illuminatable laminated glass element for a vehicle, vehicle with such an illuminable laminated glass element

[0001] The present invention relates to an illuminable laminated glass element for a vehicle, in particular a laminated glass element for a road vehicle with light-emitting diodes.

[0002] Light-emitting diodes have been used for automotive glazing elements, in particular panoramic laminated elements with LED lighting as described in document WO2010049638. The light emitted by the diodes is introduced edge-on into the inner glazing forming a guide, the light being extracted from the glazing by a diffusing layer on the glazing.

[0003] To improve light extraction, document WO2015118279 proposes a luminous laminated vehicle roof incorporating within the thermoplastic laminate interlayer a fluoropolymer film of at least 600nm thickness, with a refractive index n2 at 550nm, the inner glass being a light guide with a refractive index ni, nl-n2 being at least 0.08, the fluoropolymer film then forming an optical insulator between the inner glass and the tinted outer glass.

[0004] The present invention sought to develop an illuminable laminated glass element for an alternative vehicle.

[0005] To this end, the present invention relates to an illuminable laminated glass element for a vehicle, particularly a road vehicle (automobile: car, truck, public transport: bus, coach, etc.) or a railway vehicle (trains, metros, trams), comprising laminated glass (preferably curved) - transparent (at least in a clear (central) window) - preferably a roof, side window (movable, quarter window), particularly front or rear, or even a windshield or rear window comprising:

[0006] - a first (convex), transparent sheet made of mineral glass, preferably clear, intended to form the outer glass, with a first principal face Fl (intended to be oriented towards the outside of the vehicle) and a second opposing principal face F2, either bare or coated with a transparent functional coating (in the clear part of the glass), and a first slice, in particular with a thickness of at most Ipm or 200 nm, for a road vehicle and even a car, preferably with a thickness of at most 4 mm, or even at most 2.5 mm, or even at most 2.2 mm - in particular 1.9 mm, 1.8 mm, 1.6 mm and 1.4 mm - and even with a thickness of at least 0.7 mm, for example with a refractive index nv of at least 1.5 in the visible spectrum

[0007] - a polymer laminate interlayer, transparent (at least in the light of glass (central) - in adhesive contact with the second bare or coated face F2 (and with the third face F3 bare or coated) and, -in particular a single or multilayer laminated interlayer and even single or multilayered) - the laminated interlayer comprising an upper interlayer, preferably clear (untinted rather than tinted), preferably in adhesive contact with the second face F2 or with a functional transparent coating on the face F2 (in the clear part of the glass) in particular a coating of thickness of at most Ipm or 200nm, F2 and a lower interlayer (32) of refractive index n3 in the visible,

[0008] - a second (convex) transparent sheet (at least in the clear glass) (central)), made of mineral or polymer glass, preferably extra clear, with a refractive index of 0 in the visible range, with a third main face F3 and a fourth main face F4 opposite, preferably bare or coated with a functional coating (transparent) - in the clear part of the glass - and a second layer, in particular a functional coating with a thickness of at most Ipm or 200nm, the second layer preferably made of mineral glass, the third face F3 oriented towards the outside of the vehicle and the fourth face F4 towards the passenger compartment, in particular with a thickness of at least 0.7mm (to promote light guidance), possibly less than that of the first glass layer, even at most 2.2mm - in particular 1.9mm, 1.8mm, 1.6mm and 1.4mm - or even at most 1.3mm or at most 1mm, the total thickness of the first and second layers being preferably strictly less than 5 or 4mm, even 3.7mm.

[0009] The laminated glazing according to the invention comprises an optical insulating layer, with a refractive index n2 in the visible spectrum, transparent (at least in the clear (central) part of the glazing), of submillimeter thickness Ei and of at least 400 nm. The optical insulating layer is located between the upper interlayer and the lower interlayer, which is in particular in adhesive contact with the third face F3 or with a functional transparent coating on the face F3.

[0010] The laminated glazing according to the invention comprises a coated substrate, between the upper interlayer (31) and the lower interlayer (32), which includes:

[0011] - a transparent film, in particular tinted (preferably neutral color, grey), in material, preferably a polymer, distinct from a fluoropolymer, with a main front face Fa oriented towards face F2 and an opposite main rear face Fb oriented towards face F3, of submillimeter thickness Ef, (and a layer), in particular a transparent film being the only tinted element in the clear glass (or possibly the optical insulating coating is tinted alternately or cumulatively) and / or a transparent film covering (extending) preferably over at least 80%, or 90% or 95% of the glazing

[0012] - a functional (electroconductive) coating, comprising at least one layer functional metallic silver-based, and preferably dielectric coatings each comprising at least one dielectric layer, such that each functional metallic layer is disposed between two dielectric coatings, functional coating (transparent) on the front face Fa of the transparent film, in particular in adhesive contact with the upper interlayer layer

[0013] preferably the first sheet being clear and the upper interlayer being clear, not tinted (at least in the clear glass),

[0014] - the optical insulating layer which is an optical insulating coating, made of preferably polymer, comprising a matrix (in particular polymer) distinct from a fluoropolymer, (directly or on a functional, transparent sublayer) on the rear face Fb (in contact with or on a sublayer) and an edge, in particular optical insulating coating in adhesive contact with the lower interlayer and / or with a diffusing coating (local discontinuity, forming a means of light extraction)

[0015] - the second sheet has a refractive index, preferably of at least 1.48 and at most 1.6, in particular from 1.5 to 1.53 in the visible (especially glass sheet, preferably extra clear), n2 is less than ni (and even n3) - in the visible -, the difference of refractive indices nl-n2 being at least 0.06 in the visible, and better at least one of the following values: 0.07, 0.08. In particular if nl>n3, nl-n3 can be less than 0.05.

[0016] In particular, the light injection is in a lower part of the glazed element, under the optical insulating coating, preferably in the second sheet (via an internal wall of a hole or with injection through the edge or via the fourth face F4 refracted light into the second sheet, as detailed later).

[0017] Neither the transparent film nor the optical insulating coating is based on a fluoropolymer (defined as having a fluorocarbon-based repeating motif) that adheres poorly to the lamination interlayer or requires corona treatment. According to the invention, the polymer of the optical insulating coating and / or the transparent film has a non-fluorocarbon repeating motif (in its main chain) but whose secondary functions (grafts, side chain) may contain fluorocarbons.

[0018] For the transparent film, one can choose even an ultrathin glass (of at most 0.6mm) and even for the coated substrate an all mineral solution with a mineral (or hybrid) optical insulating coating, for example to make a liquid deposition in particular a (nano)porous silica gel sol or even of MgF2.

[0019] The mineral and / or organic optical insulating coating may be porous and / or have low index particles (hollow etc.) in particular to lower the refractive index.

[0020] The transparent film can preferably be a polymer film, rather than even ultrathin glass which can break, and even an all-polymer solution with a polymer matrix optical insulating coating, for example deposited by liquid means such as inkjet printing. By mineral (or hybrid) means, the deposition is, for example, physical vapor deposition, or by sol-gel deposition.

[0021] Moreover, the transparent film is a good substrate for carrying the functional coating, reflecting infrared.

[0022] This limits the number of films added (and the total thickness) to achieve both optical insulation and solar control functions (without compromising their quality), also simplifying manufacturing and freeing up face F2, which can be left bare or coated. Furthermore, the optical insulating coating promotes light extraction at the edge of stray light.

[0023] Advantageously, the upper interlayer, preferably clear PVB, is in contact with the functional coating and preferably with the face F2.

[0024] Advantageously, to further increase the luminance:

[0025] - the difference in refractive indices nl-n2 is at least 0.08 in the visible and better than at least one of the following values: 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35,

[0026] - the thickness Ei is at least 500nm or 800nm, 900nm, lpm and preferably less than or equal to one of the following values: 1pm, 5pm, 3pm, 2pm.

[0027] For mechanical strength (in particular if low index nanoparticles or porosities in the optical insulating coating) and / or depending on the availability of products (less easy at very low index), it may be desirable to limit the difference in refractive indices ni -n2 and choose at most 0.2 or at most 0.15 and preferably at least 0.1, 0.11, 0.12, this in particular for ni from 1.5 to 1.53.

[0028] The coated substrate (and possibly also the lower and upper interlayers, and the second sheet) has a blur of at most 1°, or even 0.5° (outside areas with light extraction means). Inclusions and pinholes are preferred to be avoided.

[0029] In particular with ni of 1.5 to 1.53 in the visible (standard glass sheet), in particular at 600nm and preferably from 500nm to 750nm and even from 380nm to 750nm, n2 and / or the average index n2m may be less than or equal to one of the following values: 1.42, 1.41, 1.40, 1.39, 1.38, 1.37, 1.36, 1.35, 1.34, 1.33, 1.32, 1.31, 1.30, 1.29, 1.28, 1.27, 1.26, 1.25, 1.2, 1.19, 1.18, 1.16, 1.17, 1.15.

[0030] In particular with ni of at least 1.55 in the visible, the refractive index n2 in the visible in particular at 600nm and preferably from 500nm to 750nm and even from 380nm to 750nm can also be less than or equal to one of the following values: 1.50, 1.49, 1.48, 1.47.

[0031] The optical insulating coating can occupy at least 80%, 90%, 95% and even 100% (unmarked) of the surface of the transparent film (face Fb) and / or the functional coating (reflecting infrared) can occupy at least 80%, 90%, 95% and even 100% (unmarked) of the surface of the transparent film (face Fa), and / or the transparent film can occupy at least 90%, 95%, 98% of the surface of the laminated glazing preferably with its edge surrounded by the lamination interlayer (by thinning of the upper and / or lower interlayer layer or via a peripheral frame layer).

[0032] In particular, a transparent polymer film without plasticizers is chosen.

[0033] The optical insulating coating can have good adhesion to the transparent film (substrate) according to the invention, preferably polymer (and even thermoplastic).

[0034] For example, the transparent film, preferably polymeric (preferably thermoplastic), has a smooth face on the Fb side and a low surface roughness of at most Ipm. Furthermore, the functional coating (reflecting infrared) can have good adhesion to the transparent polymeric film (preferably thermoplastic) and has a smooth face on the Fa side and a low surface roughness of at most Ipm.

[0035] For improved optical quality, the thickness Ei of the optical isolating coating varies by a maximum of ±5%. The thickness Ei is kept as low as possible to avoid high material costs without degrading the optical function.

[0036] Preferably the transparent film, preferably polymeric (in particular polyester, PET), is tinted, the interlayer and the first sheet are clear, and the second sheet is extra-clear. In particular, the second sheet is extra-clear glass; the lower interlayer is PVB-based with or without plasticizers, and the upper interlayer is PVB-based with plasticizers.

[0037] The optical insulating coating is transparent. It may be untinted (clear, without coloring agent) in particular having (alone) a light transmission of at least 80% or at least 90% or tinted.

[0038] In one configuration, the transparent film, in particular a polymer (in particular polyester, PET), is tinted (either the tinted element alone or with the optical insulating coating) in particular with colorimetric coordinates such as lal and lbl < 5; and preferably

[0039] - laminated glazing is a roof exhibiting light transmission (with illuminant A), in particular from 5% to 40%, and in particular the film, preferably polymeric (in particular polyester, PET), is tinted, in particular having a non-zero light transmission (with illuminant A) of at most 45% or 40%, in particular of at least 10% or 5%

[0040] - laminated glazing is a side glazing, particularly a rear glazing, in particular presenting a light transmission (with illuminant A) of 20% to 60%, and in particular the film, preferably polymeric (especially polyester, PET), is tinted exhibiting a light transmission (with illuminant A) of at most 60% in particular of at least 20%.

[0041] The optical insulating coating preferably extends throughout the clear (central) part of the laminated glazing, its edge being in particular under a masking layer (in particular frame) (ink or enamel, opaque: black etc) closer to face F2 than the latter, which is a full opaque layer and possibly with discontinuous opaque patterns (gradient for more transparency towards the center), opaque layer detailed later.

[0042] The optical insulating coating is preferably a continuous layer that covers the entire clear glass area and all or part of the coated face Fb, depending on the extent of the film under the masking layer (frame), preferably at least 90% or 95%. For example, there is a marginal area without the optical insulating coating of at most 1 mm (in particular, the frame or on one or more sides forming one or more marginal bands).

[0043] The optical insulating coating is, for simplicity, a single layer but can be manufactured in one or more passes.

[0044] The optical insulating coating can be covered with a functional (over)layer in particular a protective layer: diffusion barrier and / or mechanical protection in particular, film for example of at most 100pm and at least 30pm or coating for example of at most 10pm.

[0045] Preferably, in particular to simplify manufacturing, on the transparent film, preferably thermoplastic or crosslinked polymer, the optical insulating coating can be organic, crosslinked polymer or thermoplastic, and the organic protective overlayer, for example thermoplastic or crosslinked polymer.

[0046] The transparent film according to the invention, preferably polymer, not sticking to glass, is in adhesive contact with the lamination interlayer which links the first and second sheets.

[0047] Thus, in one embodiment, the lamination interlayer (upper interlayer, lower interlayer) is in adhesive contact with the coated substrate on both the front face (Fa) and the front face (Fb). In particular, the adhesive contact may be over the entire surface of the functional coating and in adhesive contact with the entire surface of the optical insulating coating. Optionally, a diffusing coating—forming light extraction means—is on the lower thermoplastic (PVB) interlayer, either localized or discontinuous (a set of patterns, etc.), and in contact with the optical insulating coating, and even (deposited) on the optical insulating coating.

[0048] Thus, the lower interlayer may have, on the rear face or even on the front face, a diffusing coating, preferably transparent (in the off state), or the transparent film has a diffusing coating and is preferably transparent (in the off state).

[0049] The lower interlayer is then in adhesive contact with a part of the surface of the optical insulating coating and the diffusing coating is then also in contact with the optical insulating coating.

[0050] For example, this diffusing coating (local or discontinuous set of patterns etc.) oriented towards face F2 and deposited on the lower thermoplastic (PVB) interlayer forming means of light extraction occupies at most 50% or 40% of the glazed element, and / or of the clear glass, and / or of the lower interlayer.

[0051] For example, this diffusing coating (local or discontinuous set of patterns etc.) on the F3 face or side face F3 of the lower thermoplastic (PVB) interlayer forming means of light extraction occupies at most 40% or 30% of the glazed element, and / or of the clear glass, and / or of the lower interlayer.

[0052] The optical insulating coating may comprise (be made of) an organic or hybrid mineral matrix, with said index n2 preferably of at most 1.42 or 1.4 (in particular if ni of 1.51 to 1.53), optical insulating coating clear (untinted) or possibly tinted by coloring agent (molecular or pigment).

[0053] The optical insulating coating may comprise at least 99% by weight of crosslinked polymer, optional photoinitiators, rheological agents.

[0054] The optical insulating coating is preferably deposited by liquid means.

[0055] The surface of the optical insulating coating (before assembly) is non-sticky and involving the use of a laminating interlayer. The surface of the optical insulating coating is, in particular, non-sticky to the touch when applied to glass. The lower interlayer is in adhesive contact with the surface of the optical insulating coating.

[0056] The optical insulating coating is, in particular, a varnish that can be obtained from a photocurable resin and with photoinitiators if necessary, or from a thermocurable resin, a two-component mixture, etc. A layer of crosscurable resin is deposited on the polymer film. Once the material is crosscured, the free surface is not sticky.

[0057] In particular, the optical insulating coating comprises (is made of) a crosslinked polymer matrix with said index n2 preferably of at most 1.42 (or 1.4 or 1.35), matrix preferably among polyacrylate-based polymers (for example, to have a refractive index of at most 1.42 or 1.4) with optional fluorinated function (to have the lowest possible refractive index), in particular urethane acrylate or fluorourethane acrylate or fluorosilicone acrylate, or even silicone (for example, with a refractive index of at most 1.4 or 1.3), in particular polydimethylsiloxane, epoxy polymer, polyepoxides, polyurethane, polyvinyl acetate, polyester.

[0058] Preferably the optical insulating coating is free of free silicone, of volatile silicone component (source of surface pollution).

[0059] The polyacrylate described herein refers to any polymer containing repeating units derived from acrylate. The repeating unit may be substituted or unsubstituted within the permitted valence range. The acrylate polymer may be homopolymer and / or copolymer. In this text, polyacrylate comprises one or more polymethyl acrylates, polyethylene acrylate, polypropylene methacrylate, polymethyl methacrylate, polyethylene methacrylate, polyethylene methacrylate, or polypropylene methacrylate.

[0060] The epoxy polymer described herein refers to the polymer obtained after polymerization of substances containing epoxy bonds. The epoxy polymer comprises one or more bisphenol A epoxies, bisphenol A epoxies, halogenated phenolic epoxies, phenolic epoxies, cycloaliphatic epoxies, or bisphenol S epoxies.

[0061] The crosslinked polymer material (of the optical insulating coating) may preferably be based on (or essentially composed of) a polymer combined with one or more other functional groups, such as an acrylate group for photo-crosslinking (crosslinked polymer material based on urethane acrylate or silicone acrylate) and / or a fluorine group to lower the refractive index (crosslinked polymer material based on fluorourethane acrylate or fluorosilicone acrylate). Thus, the crosslinked polymer material of the optical insulating coating is preferably a polymer based on acrylate, urethane acrylate, or even silicone or silicone acrylate, the polymer also having a fluorine group.

[0062] Depending on the desired properties, the acrylate group can be used for photocrosslinking (for an acrylate urethane or an acrylate silicone). The acrylate group enables the photocrosslinking of the polymer, whose backbone is composed of other groups such as urethane.

[0063] The optical insulating coating according to the invention may, in particular, be a liquid-based coating obtained from a formulation preferably photocurable by ultraviolet (UV, in particular UVA) or a two-component coating cured by chemical reaction. UV(A) curing is preferred because it is faster and the equipment is less expensive / more compact than that used by chemical reaction.

[0064] In a first example of optical insulating coating, a UV curable acrylate-based resin is deposited on the preferably polymer film.

[0065] In a second example of optical insulating coating, a single-component UV curable resin based on acrylates (urethane acrylate) is deposited on the polymer film.

[0066] In a third example of optical insulating coating, a silicone-based UV curable resin is deposited on the preferably polymer film.

[0067] The optical insulating coating (tinted or clear - untinted) may comprise, or even be composed of, a matrix with a refractive index n2m greater than n2 and less than n1, and preferably with n2m of at most 1.48 and n2 preferably of at most 1.42, and comprising (nano)porosity and / or low-index (nano)particles, in particular hollow ones with an external diameter of at most 300 nm or even at most 100 nm, for example, hollow silica nanoparticles. Preferably, the optical insulating coating is free of free silicone and volatile silicone components (a source of surface pollution).

[0068] The matrix may be organic, in particular crosslinked polymer or thermoplastic, in particular selected from polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, PVB or the matrix may be mineral in particular silica.

[0069] We can cite the already described low index polymers if we want to lower n2 further.

[0070] The optical insulating coating comprises in particular at most 60% by volume fraction of (nano)poroses and / or low index (nano)particles or one of the following values: 40, 45%, 40%, 35%, 30%.

[0071] The refractive index n2 can be customized according to the volume of low-index or hollow nanopores or nanoparticles. As a first approximation, the following relationship can be used to calculate the index:

[0072] n2=f.n2m+(lf).neff where f is the volume fraction of the material constituting the layer and n2m is its refractive index and neff is the index of nanoporosity (equal to 1) or the effective index of nanoparticles (hollow or low index).

[0073] The following table 1 illustrates the refractive index n2 as a function of n2m and the volume fraction.

[0074] [Tables 1] f 1-f n2m=l.5 n2m=l.48 n2m=l.45 n2m =1.42 n2m=l.4 n2m =1.35 1 0 1.50 1.48 1.45 1.42 1.40 1.35 0.9 0.1 1.45 1.43 1.41 1.38 1.36 1.32 0.85 0.15 1.43 1.41 1.38 1.36 1.34 1.30 0.8 0.2 1.40 1.38 1.36 1.34 1.32 1.28 0.75 0.25 1.38 1.36 1.34 1.32 1.30 1.26 0.7 0.3 1.35 1.34 1.32 1.29 1.28 1.25 0.65 0.35 1.33 1.31 1.29 1.27 1.26 1.23 0.6 0.4 1.30 1.29 1.27 1.25 1.24 1.21 0.55 0.45 1.28 1.26 1.25 1.23 1.22 1.19 0.5 0.5 1.25 1.24 1.23 1.21 1.20 1.18 0.45 0.55 1.23 1.22 1.20 1.19 1.18 1.16 0.4 0.6 1.20 1.19 1.18 1.17 1.16 1.14

[0075]

[0076] The mineral optical insulating coating comprises (in particular is made of) preferably: - a porous silica-based sol-gel layer and El is at most Ipm, better at most 800 nm and even 700 nm, to avoid the risk of cracking, nor can easily go up to 1.3

[0077] - or oxide-based layer (silica etc.) deposited by physical means in the vapor phase PVD such as magnetron sputtering and El is at most Ipm, better at most 700 nm because the deposition is very slow.

[0078] In magnetron sputtering the silica layer may contain one or more other elements such as aluminium and the refractive index may be 1.48.

[0079] The volume proportion of pores can be limited and controlled in particular by sol-gel method.

[0080] One can thus choose silica produced from tetraetoxysilane (TEOS)

[0081] The pores can be closed, done by removing a particulate pore-forming agent.

[0082] The structuring of the sol-gel layer into pores is linked to the sol-gel type synthesis technique, which allows the essentially mineral matter (i.e. mineral or organic-mineral hybrid) to be condensed with a suitably chosen porogenous agent in particular of well-defined size(s) and / or shape(s) (elongated, spherical, oval, etc.).

[0083] The laminated glass element (in particular the coated film) may include a protective transparent layer (film or coating), in particular polymeric (thermoplastic or cross-linked polymer), with a refractive index greater than n2, a submillimeter thickness, and even a maximum of 100 µm, covering the optical insulating coating, possibly extending beyond the optical insulating coating. In particular, it protects the optical insulating coating containing (nano)porosity and / or low-index (nano)particles, particularly hollow ones. The protective transparent layer provides mechanical protection:

[0084] -in contact with the lower intercalated layer and even with a diffusing coating, forming means of light extraction, (discontinuous or local),

[0085] The transparent film is for example a thermoplastic polymer (flexible, curved following the curvature of the glazing).

[0086] The transparent film (substrate) according to the invention preferably exhibits dimensional stability, is compatible with the lamination operation (pressurization, at a given temperature), is compatible with passage through an autoclave.

[0087] The film (substrate) according to the invention is distinct from an interlayer of lamination, which binds the sheets; it requires the use of the interlayer of lamination. The film (substrate) is preferably a non-sticky film at room temperature.

[0088] The edge of the coated substrate (of the transparent film, and even of the optical insulating coating) can be at least 10mm away from the edge of the first sheet and even at least one of the following values: 15mm, 20mm, 25mm, 30mm.

[0089] The edge of the coated substrate (of the film, of the optical insulating coating) can be at least 15mm away from the clear glass and even at least one of the following values: 10mm, 8mm, 5mm, 1mm.

[0090] For protection purposes, preferably, the perimeter of the transparent film (and even the coated substrate) can be surrounded, in contact (adhesive), with a portion of the lamination interlayer (PVB, EVA, TPU etc.) for example with a width of at least 5 mm: - either from the fining of the lower intercalated layer and / or from the fining of the upper intercalated layer - either by adding a peripheral frame layer (clear, tinted or even opaque) of a thickness greater than or equal to the thickness Ef of the transparent film.

[0091] In one embodiment, the transparent film is recessed from the first or second layer by at least 10 mm, and even by at least 15 mm, 20 mm, or 25 mm. In particular, the thickness Ef of the transparent film is at least 0.2 mm, and the glazed element includes an interlayer frame, in particular PVB (with plasticizers), forming part of the laminate interlayer framing the perimeter of the coated substrate, and in particular between faces F2 and F3. In particular, the transparent film, in particular polymer (polyester, PET), is tinted (neutral color) with colorimetric coordinates such that lal and lbl < 5, and the interlayer frame is tinted—or even opaque—with colorimetric coordinates such that lal and lbl < 5. For example, the color difference between the interlayer frame and the tinted film is limited, and in particular, a gray PVB frame and a gray tinted film are chosen.

[0092] This intermediate frame layer may be visible in a movable (rear) side window (in a slightly open window position) - if there is no other peripheral masking layer. Its tint better masks the edge of the coated substrate.

[0093] The thickness Ea of the interlayer frame can be similar to Ef, for example Ef ±50pm or even ±25pm or greater, for example if the interlayer lower thickness E' is short (same size as the film) edge to edge with the transparent film, then Ea= Ef+ E'±50pm or even ±25pm.

[0094] The intermediate frame layer is in contact with the upper intermediate layer and possibly in contact with the lower intermediate layer.

[0095] We prefer to choose the same material (PVB in particular) for upper and lower interlayer.

[0096] According to one characteristic, the color of the laminated glazing in a clear pane (outside the area of ​​light extraction means) is defined by a*l and b*l in absolute value of at most 5 or 2, (parameters defined in the L* a* b* CIE 1976 chromatic space), notably dictated by the tinted transparent film: - the glazing further comprising an opaque internal masking layer (in particular an intermediate frame layer, notably PVB), which can be defined by a*2 and b*2 in absolute value, notably of at most 5 or 2, - with a colorimetric difference AE* between the laminated glazing in the clear glass and the internal masking layer (in particular the intermediate frame layer, especially PVB) which is given by the following formula: AE* = V (AL*2 + Aa*2 + Ab*2), preferably AE* being less than 4, better AE* less than 2 (the human eye can hardly distinguish), even better AE* less than 1 (the human eye cannot distinguish).

[0097] According to one embodiment, the glazing is a side glazing (in particular movable, in particular door) comprising a peripheral masking layer (visible in mounted position, glass partially open) of a width of at least 15mm or 20mm, in the form of a peripheral straight band on the upper part or even a peripheral frame, in particular the peripheral masking layer is an enamel on a sheet of glass or on an interlayer of lamination such as PVB (frame layer of the coated substrate).

[0098] A light source on the passenger compartment side can be associated with a light redirection element, in particular a prismatic element (reflector or transparent). The interlayer frame above this light redirection element can be tinted or even opaque, black in particular to mask any stray light.

[0099] The frame layer can be locally opaque (on a strip) or opaque all around.

[0100] Furthermore, this laminated glass element is preferably curved. It thus has one or more curves, with one or more radii of curvature ranging in particular from 10 cm to 40 m. The curvature can be of high intensity, in particular of high sphericity, that is to say with at least one radius of curvature of at most 0.5 m, locally.

[0101] In order to avoid folds, undulations, preferably the coated substrate is in an area of ​​the element having a curvature, a sphericity limited in particular by a radius of curvature of at least 1.5m.

[0102] The thicker the transparent film, the less likely it is to deform and ripple. For example, a thickness of at least 100 µm can be chosen in the case of a high sphericity zone of the element.

[0103] The coated film may have a surface area of ​​at least 1 m in length and at least 50 cm in width

[0104] The coated film can occupy 100% of the glass area.

[0105] The coated film can occupy at least 80%, 90% and less than 100% of the surface of the element (to be protected at the periphery in particular, by a material in particular of interlayer of lamination).

[0106] The coated film can be of any shape, depending on the design of the element, with rounded corners etc.

[0107] The transparent film may be a thermoplastic polymer or a crosslinked polymer, in particular:

[0108] - polyester, such as polyethylene terephthalate PET, poly(butylene terephthalate) PBT, poly(ethylene naphthalate) PEN,

[0109] - polycarbonate (PC),

[0110] - polyacrylate, in particular thermoplastic, polybutylacrylate, polymethacrylate PMMA,

[0111] - polyurethane (PU), cross-linked material,

[0112] - cellulose triacetate (TAC),

[0113] - polyolefin: polypropylene (PP), polyethylene (PE),

[0114] - polyimide, polyamide, a PET-PMMA (coextruded) film,

[0115] - poly(vinyl chloride) PVC.

[0116] We prefer a PET film (easily available) or PEN, a polyacrylate film, or even PC (preferring PVB interlayers without plasticizers or with few plasticizers) or PMMA.

[0117] The transparent film is preferably of thickness Ef of at least 30pm and preferably less than 200pm, in particular of no more than 100pm.

[0118] With a polymer film, made of PC or PMMA, PVB is preferred (for greater chemical compatibility) as an interlayer in contact with it (upper or lower) and thermoplastic polyurethane (TPU) is preferred, for example. The same applies to the second polymer sheet, made of PC or PMMA.

[0119] The lower (uncolored, clear) and / or upper (uncolored, clear) interlayer, preferably in foil form, is thermoplastic or crosslinked adhesive material, preferably selected from polymers based on: poly(vinyl butyral), also known as PVB, or Ethylene-vinyl acetate copolymer, also known as EVA (thermoplastic or cross-linked), thermoplastic polyurethane (TPU), or ionomer. An example of a monomer resin is marketed by Kuraray under the registered trademark SentryGlas®. The lower (untinted, clear) and / or upper (untinted, clear) interlayer of cross-linked adhesive material is, for example, a polyacrylate sheet.

[0120] The preferably upper interlayer can be made of UV-resistant PVB, for example Eastman UV-resistant PVB, designated RU41, for example to protect any organic layer.

[0121] The lamination interlayer (one of the lower and upper interlayers, preferably the upper one) may be acoustic, in particular comprising or being made of acoustic PVB (three-layer, four-layer). Thus, the lamination interlayer may comprise at least one middle layer of viscoelastic plastic material with vibro-acoustic damping properties, in particular based on polyvinyl butyral and a plasticizer, and further comprising two outer layers of standard PVB, the middle layer being between the two outer layers. Acoustic PVBs described in patent applications WO2012 / 025685 and WO2013 / 175101 may be cited.

[0122] The lower and / or upper interlayer (untinted, clear) may, in particular, have a transparency level (TL) of at least 80% and even at least 85%. The first sheet is preferably made of clear glass and the second sheet of extra-clear glass. The transparent (clear) film may, in particular, have a TL of at least 80% and even at least 85% or 90%. The entire assembly of functional coating, transparent film (in particular polyester, PET), and optical insulating coating may, in particular, have a TL of at least 80% and even at least 85% or 90%. Alternatively, the transparent (tinted) film may, in particular, have a TL of at most 50% and even at most 30%, 20%, or 10%. The entire functional coating, transparent film (in particular polyester, PET) tinted, optical insulating coating can have a TL of no more than 50% and even no more than 30%, 20% or 10%.

[0123] The functional coating, transparent film (in particular polyester, PET), optical insulating coating assembly may in particular have a blur of no more than 1% or 0.5%.

[0124] The lower interlayer (in particular PVB or even a cross-linked polymer adhesive) may be the same size as the coated substrate (a framing layer may be necessary depending on the thickness of the coated substrate, particularly from 100 or 200 µm) or larger than the coated substrate. The upper interlayer or a framing interlayer may flow to protect the edges of the coated substrate.

[0125] The tinted window frame spacer can be grey, black (opaque or almost opaque), preferably thermoplastic and even PVB-based (with or without plasticizers).

[0126] For the lamination interlayer, a solution "all PVB", in sheets, or a solution with PVB except for the lower interlayer layer in crosslinked adhesive film or coating from a crosslinkable liquid adhesive resin may be provided, in particular when the second sheet is made of glass, in particular with an index n3 (or n'3) greater than 1.42.

[0127] For this lower interlayer, we can cite as a crosslinkable liquid adhesive resin (called LOCA) the acrylate-based adhesive resin for example in particular the product called UZ181A (refractive index 1.47) from the company AKChemTeck.

[0128] In another example of a lower interlayer in the form of a crosslinked polymer adhesive coating, a crosslinkable ultraviolet (UV) resin based on mercapto ester, the product known as NOA 65 from the Norland company, with a refractive index of 1.524, is deposited.

[0129] In another example of a crosslinked polymer adhesive layer in the form of a crosslinked polymer adhesive coating, a one-component UV-curable resin based on polyfluorene with an acrylate function is deposited, the product being named Shin-A SBPF-022 with a refractive index of 1.60.

[0130] The lower interlayer may include or even be a crosslinked polymer film, in particular of at least 30pm or 40pm or 50pm.

[0131] In particular the lower interlayer is a pressure sensitive adhesive (PSA) film, which bonds by contact after the application of mechanical pressure.

[0132] In particular, the lower interlayer of crosslinked polymer is a crosslinked polymer film, in particular of at least 30 µm, which is preferably in adhesive contact with the third face F3 and, in particular:

[0133] - pressure-sensitive film, preferably selected from polymers based acrylate, or silicone

[0134] -or a so-called post-adhesive film of partially photocrosslinked polymer before assembly and photocrosslinked (with a continuation of the photocrosslinking) after assembly, and preferably a so-called post-adhesive film based on acrylate.

[0135] As an example of an acrylate-based PSA film, we can cite the product called CS986 (refractive index 1.49) from the company Nitto.

[0136] The lower laminated interlayer may be uncolored (clear), in particular thermoplastic and / or crosslinked adhesive material, preferably selected from: EVA, TPU, PVB with at least 20% by weight of plasticizers, preferably with a thickness of at least 200 µm and at most 1 mm, or PVB with less than 20% by weight of plasticizers or without plasticizers preferably of no more than 100 pm and in particular of a thickness of at least 25 pm, and the second sheet is of extra clear mineral glass or PMMA or polycarbonate (PC).

[0137] The laminated glass element according to the invention may include one of the following sequences (strict or open):

[0138] -1 / first sheet of glass (clear) / upper thermoplastic interlayer (PVB, TPU or EVA) clear / coated substrate (functional coating / transparent film including polymer / optical insulating coating) / lower interlayer (clear) thermoplastic (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc) / second glass sheet (extra clear)

[0139] -2 / first sheet of glass (clear) / upper thermoplastic interlayer (PVB, TPU or EVA) / coated substrate (functional coating / transparent film including polymer / optical insulating coating) / lower (clear) thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc) / second polymer sheet (PMMA, PC).

[0140] For example, preferably:

[0141] -3 / first sheet of glass (clear) / upper thermoplastic interlayer (PVB) clear / coated substrate (functional coating / transparent polymer film, notably PET / optical insulating coating) / lower interlayer (clear) thermoplastic (PVB) / second glass sheet (extra clear)

[0142] -4 / first sheet of glass (clear) / upper thermoplastic interlayer (PVB) / coated substrate (functional coating / transparent polymer film including PET / optical insulating coating) / lower (clear) interlayer in adhesive cross-linked polymer material (EVA, adhesive polyacrylate etc) / second polymer sheet (PMMA, PC).

[0143] Naturally, the laminated glass element may include a light source in optical coupling with the second sheet, and preferably light extraction means, which are on the third face F3 or face F4 side. They are preferably on the third face F3 side in particular if a low-emissivity coating is on the F4 side and / or partially covers a clear pane of the glass element, in particular having a diffusing coating.

[0144] The means of light extraction are for example a diffusing coating on lower PVB interlayer or on face F3 or face F4 or on optical insulating coating in one of the sequences 1 / to 4 / .

[0145] When the extraction means are a diffusing coating (printed ink, enamel) on an interlayer PVB or on the coated substrate rather than on the second sheet of glass, it is easier to change the extraction pattern and tooling for printing on a flat film than on curved glass. For the hold mechanical and especially retaining the pieces of glass, it is also better to have the extraction on coated substrate or PVB than on glass.

[0146] The light source can be detachable, added, sold separately or as a kit.

[0147] The extraction means can be temporary (detachable stickers) and therefore added or replaced, in particular on the fourth side, or permanent, in particular on the third side.

[0148] Naturally, the second sheet is an operational light guide once their light source and extraction means are mounted.

[0149] The light source is preferably an array of light-emitting diodes (on a printed circuit board such as a PCB for "printed circuit board" in English, for example flexible), in particular a straight or curved strip,

[0150] Preferably, the diodes are surface-mounted components on the front side of a printed circuit board (PCB) with conductive traces. The width (or length) of a diode with a single semiconductor chip, generally a square diode, is preferably no more than 5 mm. The width of the PCB, in strip form, is preferably no more than 5 cm, better still no more than 2 cm, and even no more than 1 cm.

[0151] One or more light sources (peripheral, preferably offset from the glass pane), and several sets of diodes, may be used. The light source(s) may be monochromatic (emitting in blue, green, red, etc.) or polychromatic, or be adapted or combined to produce, for example, white light, etc.; they may be continuous or discontinuous, etc. The light source may be extended linearly (rectangular strip such as a diode array) along one side of the glazing (longitudinal edges) or split (with similar or distinct light, for example, different color intensity, driven independently or simultaneously) along both sides.

[0152] The light extraction means may define at least a first diffusing zone, for example with a width of at least 0.5mm, in particular a first diffusing zone that is solid and / or comprising a set of discontinuous diffusing patterns.

[0153] The glazed element may comprise a plurality of diffusing zones of identical or distinct size and / or shape. The extraction zone may therefore cover part or all of the laminated glazing depending on the lighting or the desired effect (in the form of strips arranged around the periphery of one of the faces to form a luminous frame, logos or patterns, etc.).

[0154] The diffusing zone can be in several zones, for example each with patterns, identical or distinct, continuous or discontinuous, and can be of any geometric shape (rectangular, square, triangular, circular, oval, etc.), and can form a design, a sign (arrow, letter...).

[0155] In one embodiment, the light extraction means may include an extraction film between the optical insulating coating and the third face F3, preferably on the third face or the fourth face F4.

[0156] This extractor film can be glued to the rear face Fb of the coated substrate and can be reflective.

[0157] An example of a film with reflective reliefs, in particular a plastic film with a refractive index greater than or equal to ni, with reflective reliefs (prisms) forming light extraction on the third face of an automotive element, is described in patent WO2013 / 167832.

[0158] Textured polymer films with a relief are available on the market and one can cite for example the Vikuiti® Image Directing Film II marketed by the company 3M.

[0159] A mineral or organo-mineral coating based on silica can also be formed with the reliefs, by sol-gel method.

[0160] An extraction film may comprise a plurality of individual prisms, each consisting of an oblique surface and a surface essentially perpendicular to the general plane of the second sheet.

[0161] Examples of regular relief include Fresnel lens type relief or Fresnel prism type relief.

[0162] The extraction film may have a custom extent. It may be localized or cover at least 50%, 60%, or 70% of the clear glass area. The extraction film may have one or more localized extraction zones (textured, etc.) or occupy at least 50%, 60%, or 70% of the clear glass area (and / or at least 50%, 60%, or 70% of the surface of the transparent film). The extraction film may be smaller than the lower interlayer and / or the transparent film.

[0163] The means for extracting light may be a frosted area of ​​the second sheet of glass or at least an area etched into the thickness of the second sheet of glass or diffusing elements, such as glass particles or fibers, incorporated into the lamination interlayer.

[0164] In summary, under the optical insulating coating (further from face F2 than the insulating coating), means for extracting light, guided light in the light guide, are for example in the form of:

[0165] - laser engraving in the guide (mineral), in particular the second sheet of glass,

[0166] - texturing (acid etching of the glass, etc.), textured film

[0167] -or diffusing coating or film, preferably transparent, with a binder and diffusing particles, binder (organic, mineral or hybrid) preferably transparent with a refractive index n5 greater than or equal to ni or even n3, in particular of at least 1.48.

[0168] The binder may be a transparent ink

[0169] Preferably the entire diffusing coating on its substrate (second sheet, lower interlayer) has a light transmission of at least 80% and a blur of at most 30%.

[0170] In particular the glazed element includes, under the optical insulating coating, in particular on the F4 face side or between the optical insulating coating and the second sheet, means for extracting light, comprising a diffusing coating (local or discontinuous), preferably transparent, with a binder and diffusing particles, binder preferably of refractive index n5 greater than or equal to ni (or even n3), in particular of at least 1.48.

[0171] In particular, the lower thermoplastic interlayer (PVB) - with or without plasticizers - or the second sheet is the substrate of the diffusing coating, (thus on face F4 or F3 or rear face side Fb), in particular possibly in contact with the optical insulating coating on the rear face Fb.

[0172] For example, the binder of the diffusing coating is organic, in particular crosslinked polymer, chosen from polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, or even thermoplastic based on PVB, or even TPU.

[0173] Advantageously, the second sheet is extra-clear glass and the lower interlayer is PVB-based, with or without plasticizers, the upper interlayer is PVB-based with plasticizers.

[0174] The lower (and / or upper and / or even frame) interlayer can be PVB-based and comprise 70% to 75% by weight of PVB, 25% to 30% by weight of plasticizer, and less than 1% by weight of additives. There are also PVB sheets with little (less than 10% or 5% by weight of plasticizers) or no plasticizer, such as the "MOWITAL LP BF" film from KURARAY.

[0175] In one configuration, particularly when the lower interlayer is the substrate for the diffusing coating, the lower interlayer is PVB-based with no plasticizers or with at most 15%, 10%, or 5% plasticizers. For example, the thickness of the lower interlayer forming the substrate for the diffusing coating is at most 200 µm.

[0176] An example of a diffusing coating on a polymer layer, in particular a laminate interlayer and based on PVB, is in document WO2021005162.

[0177] An example of a diffusing coating on a layer of PVB or glass laminate interlayer is in document WO2023285743.

[0178] For example, the binder of the diffusing coating is a polyacrylate polymer and the binder of the optical insulating coating is a polyacrylate polymer, in particular a polyacrylate with a fluorinated function and / or with low-index nanoparticles or nanoporosity, especially if the coatings are in contact (and even the diffusing coating - deposited - on the optical insulating coating, especially directly or on a protective coating preferably polyacrylate polymer).

[0179] Preferably, the diffusing particles (dielectric, organic or mineral, for example metal oxides) have a particle size defined by D90 less than 2 pm, preferably of at least 100nm and even of at most 700 nm, in particular 400 nm ± 100nm.

[0180] Preferably, the scattering particles are chosen from non-luminescent TiO2, SiO2, CaCO3, ZnO, Al2O3, and ZrO2 particles. Preferably, the particles have a (high) refractive index, greater than or equal to 1.8 or even 2 (greater than n5, in particular, by at most 1.8 or 1.7).

[0181] Preferably, for the manufacture of the diffusing coating, a resin curable under ultraviolet radiation is chosen from among a reaction product between a thiol and an alkene (called thiol-ene), an acrylate such as epoxy-acrylate, polyester-acrylate, urethane-acrylate, silicone-acrylate alone or in a mixture of several of them.

[0182] The thickness of the diffusing coating is at most 100 pm, preferably at most 50 pm, and in particular at least 5 pm or 10 pm. The minimum may depend on the deposition method.

[0183] A thin profile reduces material costs, but the thickness can be adjusted to modify the visibility / luminance trade-off of the pattern.

[0184] Preferably, the refractive index of any layer according to the invention is defined for a reference value in a range from 550 to 630 nm, preferably to 600 nm. Preferably, the difference in refractive indices ni - n2 is verified for the entire visible spectral range of the light source.

[0185] A polymer layer according to the invention (optical insulating coating, diffusing coating, interlayer layer, etc.) may contain at least 80%, 90%, 95% or 99% by weight of polymer(s) and even at most 20%, 10%, 5%, 2%, 1% of additives

[0186] A crosslinked polymer layer (optical insulating coating, diffusing coating, interlayer layer) according to the invention may contain a main polymer (or base polymer) of at least 50%, 60%, 70%, 80%, 90%, 95% by weight of polymer(s).

[0187] A crosslinked polymer layer according to the invention may include other additives (preferably less than 10%, 5%, or 1% by weight of layer) such as at least one of the following additives:

[0188] - crosslinking agent for example photoinitiators (residuals),

[0189] - plasticizers (for added flexibility)

[0190] - membership promoters

[0191] - additives for durability.

[0192] The degree of polymerization or even crosslinking of a crosslinked polymer layer according to the invention is not necessarily 100%; the material may therefore contain residual prepolymers, monomers, and oligomers. The layer can be analyzed by NMR (Nuclear Magnetic Resonance) after crosslinking to determine the degree of polymerization. A mixture of polymers may be present.

[0193] In one embodiment, the glazed element may include a light source, preferably an array of light-emitting diodes, which is optically coupled with the second sheet of glass, preferably mineral glass:

[0194] - by a light redirection element, -local-, light redirection element reflector and third main face F3 or transparent light redirection element on fourth main face F4.

[0195] - by all or part of the second tranche,

[0196] - or by a wall of a hole (through thickness, closed) in the second sheet (or several walls of several holes), including a hole offset from a clear pane of glass, facing an internal masking layer.

[0197] One can have several light sources, for example along two longitudinal edges of a roof

[0198] A light source can be located in the lower part of a side window (movable or fixed). The light source is obscured by the door once it is installed. A black seal (made of rubber, for example EPDM) on the side edges can reduce the amount of glass visible.

[0199] In the case of light injection through the second layer, the light source is coupled to the layer of the second sheet, possibly in a through-hole peripheral notch. The light source can be housed in a polymer encapsulation as described in application WO2010049638, particularly in Figure 15 or Figure 16, and may even have a recess for removal or replacement of the source.

[0200] In the case of light injection via an internal wall of a hole, the second sheet, particularly one made of mineral glass, has at least one peripheral hole (through or even blind in thickness, open on the fourth face F4 at least) under an internal masking layer (outside the clear glass area), and the light source is coupled to the wall of the second sheet delimiting the hole, preferably housed within the hole. The light source, particularly diodes, may be in the hole, may be associated with an optical element (light guide) between the injection wall and the light source in the hole or inside the housing. Examples of embodiments described in patents WO2018 / 178591 and WO2013 / 110885 can be cited.

[0201] In the case of light injection by moving the light source to the passenger compartment side, preferably the peripheral (prismatic) light redirection element is reflector and third side face F3, comprising reflective prisms or transparent fourth main side F4, comprising reflective prisms or being a prism (or both).

[0202] The light source is then opposite or offset from the fourth main face, in particular direct optical coupling or via optics, in particular light source and light redirection element offset by a clear pane of glass, facing an internal masking layer.

[0203] An optical element (collimation element, etc.) may be placed between the light source and the fourth face F4, in particular an optical element fixed to the fourth face F4. The light source may be fixed to the fourth face F4. The principal direction of the light source's radiation may be adjusted, for example, to 22° from the normal to the glazing.

[0204] In particular, the glazed element comprises a light source, preferably an array of light-emitting diodes, on the fourth face F4, and (at least) a light redirection element (local, peripheral), which is:

[0205] - preferably a reflective prismatic element comprising reflective prisms, third side, face F3, reflective prisms oriented towards face F2 or face F3

[0206] - or which is preferably a prismatic element transparent on the fourth face main F4, comprising prisms (microprisms) or is a prism (macroprism).

[0207] The light redirection element is in particular in contact with the lamination interlayer, in particular reflective prismatic polymer film or transparent.

[0208] Preferably, in order not to generate stray light escaping towards the second face F2 and diffusing (the inner edge of) the peripheral light redirection element, in particular a prismatic reflective or transparent polymer film, is:

[0209] - at least partially opposite the optical insulating coating

[0210] - or at most 4mm, preferably at most 1mm, from the insulating coating optical

[0211] Preferably, the light redirecting reflector element, in particular a prismatic reflector element, is preferably above at most 30pm from the rear face Fb or in the plane of the rear face Fb or closer to the third face F3.

[0212] The base or the apex of the prisms of the reflecting prismatic element, in particular reflecting prismatic film, is preferably above at most 30pm of the rear face Fb or in the plane of the rear face Fb or closer to the third face F3.

[0213] The reflective light redirection element may be a prismatic (textured) film (with a smooth (non-textured, non-functional) main surface and a textured, functional opposite surface), flexible and therefore curved to adapt to the curvature of the laminated glazing. In particular:

[0214] - a partially structured transparent polymer film forming (micro)prisms

[0215] - or a transparent (flat) polymer film, substrate format, with on a surface main a transparent layer (polymer) with an arrangement of (micro)prisms.

[0216] The (micro)prisms (reflectors) are oriented towards the third face F3 or towards the second face F2.

[0217] The light-reflecting element can be glued to the third face F3 directly or via at least one adhesive, or held in place by suction (strong interaction), in particular by the pressure of the assembly. The light-reflecting element is placed on the third face and, after the air is drawn out, a suction effect occurs.

[0218] The prisms may be of a height of at least Ipm and preferably of at most 100 or 50pm or 30pm.

[0219] The substrate film of the microprisms can be less than 200 µm, 100 µm, 80 µm or 50 µm and even at least 30 µm. For example, it is a PET which can be tinted (and even opaque) if the film (the reflecting prisms) is oriented towards the third face F3.

[0220] Preferably the film has a total thickness of at most 500pm or even 400pm or 200pm or 100pm.

[0221] In particular, the light redirection element is a prismatic reflector element, comprising reflector prisms, arranged on the third principal face F3, is:

[0222] - on the third face F3, in particular in contact with the intercalated layer lower or intermediate frame layer (untinted, clear) - especially if the intermediate layer is the same size as the coated substrate

[0223] - in the laminate interlayer, particularly PVB-based:

[0224] - embedded in the lower interlayer, in particular based on PVB (with or without plasticizers) or in an interlayer frame (clear) around the perimeter of the coated film, particularly PVB-based (with or without plasticizers)

[0225] - on the lower intercalated layer, between lower intercalated layers, in particular based on PVB (with or without plasticizers), and a top interlayer (preferably with plasticizers) clear or tinted, or a frame interlayer around the perimeter of the coated film, clear, tinted and even opaque, particularly based on PVB (with or without plasticizers)

[0226] - on the rear face Fb, in particular in contact with the lower intercalated layer

[0227] in particular the reflecting prisms being on the second side F2 or on the third side F3.

[0228] Preferably the prismatic redirecting element has a width (preferably less than the width of a masking layer) of at most 10 cm or at most 5 cm or even at most 2 cm and better of at least 1 cm and in particular of a length similar to that of the light source, linear (custom-made). It could be a rectangular strip with rounded corners, for example.

[0229] Microprisms (equipped with the reflective coating) act in particular as reflective prisms and reflect the light that strikes them in a direction which depends on the angle of inclination of the prism surfaces and the angle of incidence of the light.

[0230] For example, a prismatic film comprises a transparent thermoplastic film, for example based on polyethylene terephthalate (PET), on which transparent prisms are formed from a polyacrylate (a resin crosslinked, for example, by UV). For the reflective prismatic film, a metallic layer is added (conformal coating).

[0231] The transparent prismatic film preferably has a light transmission of at least 70%, more preferably of at least 80%, very preferably of at least 90%.

[0232] The microprisms have a triangular cross-section. The prisms are contiguous.

[0233] For example, the total thickness of the prismatic reflector film is at most 500 pm (in particular of at least 30 or 50pm) and even at most the thickness of the lower interlayer and / or coated film.

[0234] The light source on the fourth side can be associated with collimating optics. The light source, with an optional collimator, can be fixed to the fourth side, either by direct bonding or by being spaced apart and mounted on a peripheral support fixed to the fourth side.

[0235] The interlayer cade in particular opaque can cover the light redirection element (reflective prismatic film).

[0236] The possible inner peripheral masking layer (facing F4) may include a space so as not to block optical coupling in particular to allow the rays from the light source to pass to the light redirection element.

[0237] This redirecting film (transparent) is, for example, longitudinal in shape, in particular rounded at the corners, for example the length of the clear glass. This redirecting film may be of a thickness of at most 0.5 mm or 0.4 mm and in particular of at least 50 µm, 100 µm.

[0238] The light source and the light redirection element can be offset from a pane of glass, facing an internal masking layer. The redirection element (redirecting film) and / or the light source is, for example, at most 100 mm from the pane of glass and / or preferably at least 10 or 20 mm.

[0239] The slice of the light redirection element may be at least 10mm away from the slice of the first leaf and even at least one of the following values: 15mm, 20mm, 25mm, 30mm.

[0240] The internal masking layer is not necessarily opaque enough to prevent stray light from being seen, the light source being on the fourth face F4. An internal opaque element, peripheral and between the second and third faces, particularly between this internal masking layer (delimiting the clear glass) and the third face, or even replacing this internal masking layer, may be desirable.

[0241] The internal opaque element masks the light source (the light points of the source) which is on the fourth face (F4) or even masks the light redirection element (optical redirection film) opposite the light source.

[0242] An internal opaque element of the same or similar color to the internal opaque masking layer (optional), in particular black, is preferred.

[0243] This internal opaque element, preferably black, and preferably under the internal black masking layer, is selected from:

[0244] - a piece within the interleaf (black, with black coating, metallic piece, polymer etc.)

[0245] - in particular a film, especially a polymer (non-adhesive) film inserted within the interlayer, in particular a tinted film (opaque film in mass or with an opaque layer, for example, placed or glued onto the peripheral part of the transparent film)

[0246] - in particular an opaque layer for example on the peripheral part of the film transparent

[0247] - or interlayer, in particular thermoplastic such as PVB (area - outside clear of glass - of the lower or upper interlayer or locally opaque upper layer or all around the perimeter).

[0248] The internal opaque element may extend upstream of the injection zone (from the outer edge of the light direction element) to the edge or at least 1cm or 5mm from the edge of the glazing.

[0249] This internal opaque element may preferably have a light transmission of less than 5%, more preferably less than 2%, 1% or 0.5% or even zero.

[0250] An example of opaque PVB containing black pigments is the product called RB 17830000 Vanceva absolute black® sold by Saflex.

[0251] In particular, for a transparent film with a thickness of at least 0.2 mm, a peripheral intermediate layer made of the same material as the two layers, notably PVB-based (or, for example, pressure-sensitive thermosetting adhesive), surrounds and touches the edge of the transparent film and is located between these two layers, extending beyond and in contact with them. This peripheral intermediate layer forms part of the lamination interlayer. For a transparent film with a thickness of 0.2 mm or less, the thermoplastic material can flow sufficiently.

[0252] Preferably for the transparent film (especially polymer film) according to the invention, a thickness of at least 30 or 40 µm or 50 µm is preferred for easy handling during assembly and preferably of no more than 400 µm or 300 µm.

[0253] The functional coating according to the invention is in particular a stack of thin films comprising at least two silver-based metallic functional layers, each silver-based metallic functional layer being arranged between dielectric coatings.

[0254] As an example of a transparent film carrying the functional coating, the XIR® film from the Eastman company can be cited.

[0255] In this description, unless otherwise indicated, the expression "based on", used to describe a material or layer as to what it contains, means that the mass fraction of the constituent it comprises is at least 50%, in particular at least 70%, preferably at least 90%.

[0256] It is understood that the functional coating can also be used to electrically heat the glass.

[0257] The functional coating is deposited by magnetic field-assisted sputtering (magnetron process). According to this advantageous embodiment, all coating layers are deposited by magnetic field-assisted sputtering. Unless otherwise specified, the terms "above" and "below" do not necessarily mean that two layers and / or coatings are in contact with each other. When it is specified that a layer is deposited "in contact" with another layer or coating, this means that there cannot be one (or more) layer(s) interposed between these two layers (or layer and coating).

[0258] The functional coating preferably comprises at least two or three silver-based metallic functional layers, each disposed between two dielectric coatings.

[0259] The thickness of one (of each) silver-based metallic functional layer is preferably from 5 nm to 50 nm, in particular preferably from 5 nm to 25 nm and even from 8 to 15 nm.

[0260] The silver-based metallic functional layer comprises at least 95.0%, preferably at least 96.5%, and more preferably at least 98.0% by mass of silver relative to the mass of the functional layer. Preferably, a silver-based metallic functional layer comprises less than 1.0% by mass of metals other than silver relative to the mass of the silver-based metallic functional layer.

[0261] The functional coating may further comprise at least one blocking layer located in contact with a silver-based functional metallic layer.

[0262] The blocking layers traditionally serve to protect the functional layer(s) from possible degradation during the deposition of the upper anti-reflective coating and during any possible high-temperature heat treatment, such as annealing, bending and / or quenching.

[0263] The blocking layer(s) are chosen from: - metallic coatings based on a metal or metallic alloy, metallic nitride coatings, and metallic oxynitride coatings of one or more elements selected from titanium, zinc, tin, nickel, chromium, and niobium, - the metallic oxide layers of one or more elements chosen from titanium, nickel, chromium and niobium.

[0264] The blocking layers may in particular be layers of Ti, TiN, TiOx, Nb, NbN, Ni, NiN, Cr, CrN, NiCr, NiCrN, SnZnN. When these blocking layers are deposited in metallic, nitrided or oxynitrided form, these layers may undergo partial or total oxidation depending on their thickness and the nature of the layers surrounding them, for example, at the time of deposition of the next layer or by oxidation in contact with the underlying layer.

[0265] According to advantageous embodiments of the invention, the blocking layer(s) satisfy one or more of the following conditions: - each functional silver-based metallic layer can be located below and / or above, and possibly in contact with, a blocking layer selected from a blocking sublayer and a blocking overlayer, and / or - the blocking layer may be based on at least one element chosen from nickel, chromium, niobium, tantalum and titanium, and / or - each functional metallic layer is in contact with a blocking overlayer, and / or - the thickness of each blocking layer is at least 0.1 nm, preferably between 0.2 and 2.0 nm or between 0.2 and 0.5 nm.

[0266] According to the invention, the blocking layers are considered not to be part of a dielectric coating.

[0267] For the purposes of this invention, the term "dielectric layer" with respect to the functional coating should be understood to mean that, from the point of view of its nature, the material is "non-metallic," that is to say, not a metal. In the context of the invention, this term designates a material having an n / k ratio over the entire visible wavelength range (from 380 nm to 780 nm) equal to or greater than 5.

[0268] The dielectric layer(s) have the following characteristics, alone or in combination: - they are deposited by magnetic field-assisted sputtering, and / or - They are chosen from the oxides or nitrides of one or more elements chosen from titanium, silicon, aluminum, zirconium, tin and zinc, and / or - They are chosen from: oxide layers of one or more elements chosen from titanium, silicon, aluminum, zirconium, iron, chromium, cobalt, manganese, tungsten, niobium, bismuth, tantalum, zinc and / or tin, Nitride layers of one or more elements selected from silicon, zirconium and aluminium, oxynitride layers of one or more elements selected from silicon, zirconium and aluminium, metallic sulfide layers such as zinc sulfide, and / or - they have a thickness greater than 2 nm, preferably between 4 and 100 nm.

[0269] According to advantageous embodiments of the invention, the dielectric coatings of the functional coatings satisfy one or more of the following conditions: - the dielectric layers can be based on oxide or nitride of one or more elements chosen from silicon, zirconium, titanium, aluminum, tin, zinc, and / or - at least one dielectric coating comprises at least one barrier dielectric layer, and / or - each dielectric coating comprises at least one barrier dielectric layer, and / or - The dielectric layers with barrier function are based on silicon and / or aluminum compounds chosen from oxides such as SiO2 and Al2O3, nitrides Si3N4 and A1N and oxynitrides SiOxNy and Al10xNy, based on zinc and tin oxide or based on titanium oxide, - the barrier dielectric layers are based on silicon and / or aluminum compounds and may include at least one other element, such as aluminum, hafnium and zirconium, and / or - at least one dielectric coating includes at least one dielectric layer with a stabilizing function, and / or - each dielectric coating includes at least one dielectric layer with a stabilizing function, and / or - the dielectric layers with stabilizing function are preferably based on an oxide chosen from zinc oxide, tin oxide, zirconium oxide or a mixture of at least two of them, and / or - the dielectric layers with stabilizing function are preferably based on crystalline oxide, in particular zinc oxide, possibly doped with at least one other element, such as aluminium, and / or - each functional layer is above a dielectric coating whose upper layer is a dielectric layer with a stabilizing function, preferably based on zinc oxide and / or below a dielectric coating whose lower layer is a dielectric layer with a stabilizing function, preferably based on zinc oxide.

[0270] Preferably, each dielectric coating consists solely of one or more dielectric layers. Preferably, there is therefore no absorbing layer in the dielectric coatings so as not to reduce light transmission.

[0271] The dielectric layer(s) may have a barrier function. A dielectric layer with a barrier function (hereinafter referred to as a barrier layer) is defined as a layer made of a material capable of blocking the diffusion of oxygen and water at high temperatures, from the ambient atmosphere or the transparent substrate, towards the functional layer. Such dielectric layers are selected from among the following: - layers based on silicon and / or aluminum compounds selected from oxides such as SiO2 and Al2O3, nitrides such as Si3N4 and AlN, and oxynitrides such as SiOxNy > AlOxNy, possibly doped with at least one other element, - layers based on zinc and tin oxide, - layers based on titanium oxide.

[0272] Preferably, each dielectric coating comprises at least one dielectric layer consisting of: - of an aluminium and / or silicon nitride or oxynitride or - of a mixed zinc and tin oxide, or - of a titanium oxide.

[0273] These dielectric layers have a thickness: - less than or equal to 80 nm, less than or equal to 60 nm or less than or equal to 25 nm, and / or greater than or equal to 5 nm, greater than or equal to 10 nm or greater than or equal to 15 nm.

[0274] The zinc oxide layer may optionally be doped with at least one other element, such as aluminum. The zinc oxide is crystalline. The zinc oxide-based layer comprises, in increasing order of preference, at least 90.0%, at least 92%, at least 95%, at least 98.0% by mass of zinc relative to the mass of elements other than oxygen in the zinc oxide-based layer.

[0275] Preferably, the dielectric coating(s) of the functional coatings comprise a zinc oxide-based dielectric layer located below the silver-based metallic layer.

[0276] The zinc oxide layers have, in order of increasing preference, a thickness of: - at least 3.0 nm, at least 4.0 nm, at least 5.0 nm, and / or - at most 25 nm, at most 10 nm, at most 8.0 nm.

[0277] According to advantageous embodiments of the invention, the dielectric coatings satisfy one or more of the following conditions: - Each dielectric coating comprises a layer containing silicon selected from silicon nitride-based layers, - Each dielectric coating located beneath a functional layer comprises a zinc oxide-based layer situated below, in contact with, or separated from by a blocking layer by the functional layer, - Each dielectric coating located above a functional layer comprises a zinc oxide-based layer situated above, in contact with, or separated from by a blocking layer by the functional layer, - each dielectric coating located below a functional layer comprises a zinc oxide and tin oxide-based layer located below and in contact with a zinc oxide-based layer.

[0278] The functional coating may optionally include a protective top layer. The protective top layer is preferably the last layer of the functional coating (of the stack), that is, the layer furthest from the transparent film (Fa face). These protective top layers are considered to be included in the last dielectric coating. These layers generally have a thickness of between 2 and 10 nm, preferably between 2 and 5 nm.

[0279] The protective layer may be selected from a layer of titanium, zirconium, hafnium, zinc and / or tin, this or these metals being in metallic, oxidized or nitrided form. Advantageously, the protective layer is a layer of titanium oxide, a layer of zinc tin oxide or a layer based on titanium oxide and zirconium oxide.

[0280] The preferably functional coating comprises successively from the transparent film an alternation of three silver-based functional metallic layers named from the film first, second and third functional layers, and four dielectric coatings.

[0281] In particular, the functional coating comprises two or three silver-based metallic layers, and preferably each dielectric coating located below a functional layer comprises a zinc oxide-based layer located below, in contact with, or separated by a blocking layer from the functional layer and / or each dielectric coating located above a functional layer comprises a zinc oxide-based layer located above, in contact with, or separated by a blocking layer from the functional layer.

[0282] A particularly advantageous embodiment of the functional coating relates to a defined stack starting from the transparent film comprising: - a first dielectric coating comprising at least one barrier layer and one stabilizing dielectric layer, - possibly a blocking layer, - a first functional layer, - possibly a blocking layer, - a second dielectric coating comprising at least one lower stabilizing dielectric layer, one barrier layer and one upper stabilizing dielectric layer, - possibly a blocking layer, - a second functional layer, - possibly a blocking layer, - a third dielectric coating comprising at least one lower stabilizing dielectric layer, one barrier layer, and one upper stabilizing dielectric layer, - possibly a blocking layer, - a third functional layer, - possibly a blocking layer, - a fourth dielectric coating comprising at least one dielectric layer with a stabilizing function, one layer with a barrier function, - possibly a protective layer.

[0283] Another particularly advantageous embodiment of the functional coating relates to a defined stacking starting from the transparent film: - a first dielectric coating comprising at least one silicon nitride-based layer and one zinc oxide-based layer, - possibly a blocking layer, - a first functional layer, - possibly a blocking layer, - a second dielectric coating comprising at least three successive layers: a zinc oxide-based layer, a silicon nitride-based layer, and a zinc oxide-based layer, - possibly a blocking layer, - a second functional layer, - possibly a blocking layer, - a third dielectric coating comprising at least three successive layers: a zinc oxide-based layer, a silicon nitride-based layer, and a zinc oxide-based layer, - possibly a blocking layer, - a third functional layer, - optionally a blocking layer, - a fourth dielectric coating comprising at least one zinc oxide-based layer, one silicon nitride-based layer, and - optionally a protective layer.

[0284] The following examples are transparent films carrying a functional coating with 1, 2, or 3 silver layers with dielectric coatings.

[0285] Example 1 SiNx ZnO NiCr Ag2 ZnO (ZnSnOx) SiNx Transparent film (Fa side)

[0286] Example 2 ZnSnOx ZnO NiCr Ag2 ZnO ZnSnOx Transparent film (Fa side)

[0287] Example 3 SiNx ZnO NiCr Ag2 ZnO (ZnSnOx) SiNx ZnO

[0288] NiCr Agi ZnO (ZnSnOx) SiNx Transparent film (Fa side) Example 4

[0289] ZnSnOx ZnO NiCr Ag2 ZnO ZnSnOx ZnO NiCr Agi ZnO ZnSnOx Transparent film (Fa side) Example 5 Si3N4 ZnO NiCr Ag3 ZnO (ZnSnOx) SiNx ZnO NiCr Ag2 ZnO (ZnSnOx) SiNx ZnO NiCr Agi ZnO (ZnSnOx) SiNx Transparent film (Fa side)

[0290] Example 6 ZnSnOx ZnO NiCr Ag3 ZnSnOx ZnO ZnSnOx ZnO NiCr Ag2 ZnO ZnSnOx ZnO NiCr Agi ZnO Transparent film (F side)

[0291] The glazing may therefore include between the second face (in particular F2) and the third face (in particular F3), an opaque, internal peripheral masking layer, in particular an enamel (black etc) on the second face or a coating on the laminate interlayer (upper interlayer in particular) for example an opaque coating (based on PVB and with coloring agent) on a main face of a PVB on the second or third face side.

[0292] The internal masking layer can be 2 mm or 3 mm (less than 5 mm) from the edge of the glazing or even right up to the edge. The masking layer can be a band framing the glazing (windshield, roof, etc.), particularly in black. Opaque coating is applied around the entire perimeter to conceal bodywork elements or seals, or to protect an adhesive for mounting on the vehicle. This internal masking layer is in contact with the second main surface. This internal masking layer defines the clear area of ​​the glazing. It can be advantageous for the outer edge of the optical insulating coating, or more broadly any adhesive layer of the laminate interlayer, to be masked by the internal masking layer and not be within the clear area of ​​the glazing.It can be advantageous for the external and even internal edges of the frame layer to be masked by the internal masking layer, so that they are not in the clear glass area, and for the frame layer to be under the internal masking layer.

[0293] The width of the internal masking layer along the sides of a motor vehicle component (roof in particular) is generally less than that at the front or even the rear.

[0294] In particular another masking layer, called the inner layer, can be on the fourth side called F4 on the passenger compartment side, in particular facing the inner masking layer (and even of the same nature, for example an enamel, in particular black on a second sheet of mineral glass).

[0295] In particular for an automotive component (the first sheet being the outer glazing) such as the roof:

[0296] - the width of the internal (and even inner) masking layer along the edges longitudinal can be at most 30cm, in particular 10-20cm.

[0297] - the width of the internal (and even inner) masking layer along the edge the rear lateral can be at most 40cm or 30cm in particular of at least 1 or 5cm and along the front lateral edge of at most 60cm or 40cm in particular of at least 1 or 5cm.

[0298] The width of the inner masking layer is preferably greater than that of the inner masking layer. In particular, the inner masking layer is congruent with, or narrower than, the width of the inner masking layer.

[0299] The internal and / or inner masking layer may be an organic or mineral binder (fused glass frit) with an organic or inorganic coloring agent, including molecular coloring or inorganic pigment.

[0300] The internal and / or inner masking layer is preferably a continuous layer (flat with a solid edge or alternatively a gradient edge (set of patterns).

[0301] Thus, the laminated glazed element may comprise at least one of the following functional elements:

[0302] - an internal, peripheral, opaque masking layer between the second face F2 and the third face F3, and even covering the perimeter of the optical insulating coating and even the coated substrate, particularly in contact with the second main face F2, defining a clear window

[0303] - an inner, peripheral, opaque masking layer on the fourth face main F4, in particular congruent with or less than the width of the internal masking layer,

[0304] - an internal, peripheral opaque element which is between the second face F2 and third face F3 (and even between an internal masking layer and the third face F3), notably masking a light source and a light redirection element

[0305] - an external electroconductive coating, in particular reflective of infrared (low emissivity), on face F4 of the second mineral glass sheet, such as a stack with a transparent conductive oxide (TCO) functional layer (in particular indium tin oxide (ITO) or fluorine-doped tin oxide), and preferably dielectric coatings each comprising at least one dielectric layer, so that the transparent conductive oxide functional layer is disposed between two dielectric coatings.

[0306] Examples of 1TTO stacking for face F4 include those described in US patent 2015 / 0146286, on face F4, particularly in examples 1 to 3.

[0307] An infrared-reflective coating is also known in patent application WO2018 / 206236 and in particular:

[0308] - a dielectric coating comprising dielectric layers such as layers of silicon nitride and / or silicon oxide, - a functional layer based on a transparent conductive oxide (TCO) such as an indium tin oxide (ITO) layer, - a dielectric coating comprising dielectric layers such as silicon nitride and silicon oxide layers.

[0309] The first and second leaves may be of shape and size in particular substantially identical, for example general rectangular or quadrilateral shape (longitudinal edges not parallel), possibly rounded corners.

[0310] The first sheet may be larger than the second sheet, thus exceeding the second sheet on at least one part (one side or several adjacent or opposite sides) of its perimeter, and possibly the second sheet (cabin side) may be smaller with an edge set back by at most 10 or 5 cm from the edge of the first sheet of glass, on one or more edges (longitudinal and / or lateral) in particular or on the entire perimeter, particularly useful when the second sheet is optically coupled by its peripheral edge to a light source.

[0311] The first mineral glass sheet may be based on silica, soda-lime, preferably silicosodocalcium, or even aluminosilicate, or borosilicate, and preferably has a total iron oxide content (expressed as Fe2O3) of at least 0.4% and preferably of no more than 1.5%.

[0312] To limit absorption, the second mineral glass sheet may be, in particular, based on silica, soda-lime, silicosodocalcium, aluminosilicate, or borosilicate, and has a total iron oxide content (expressed as Fe2O3) by weight of not more than 0.05% (500 ppm), preferably not more than 0.03% (300 ppm) and not more than 0.015% (150 ppm), and in particular greater than or equal to 0.005%. The redox potential of the second glass sheet is preferably greater than or equal to 0.15.

[0313] The second sheet can be made of polymer in particular based on polyurethane (PU) typically with ni of about 1.47, polycarbonate (PC) typically with ni of about 1.59, poly(methyl methacrylate) (PMMA) typically with ni of about 1.47, poly(vinyl chloride) (PVC) with ni of about 1.54.

[0314] The second sheet can be flexible to follow the curvature of the first curved or pre-formed sheet.

[0315] The first sheet of glass, and even the second sheet of glass chosen, can be produced by the "float" process allowing to obtain a perfectly flat and smooth sheet, or by drawing or rolling processes.

[0316] Examples of glass include float glass of classic soda-lime composition, possibly hardened or tempered by thermal or chemical means, aluminum or sodium borosilicate or any other composition.

[0317] In the present text, light transmission is calculated for example from the transmission spectrum between 380 and 780 nm taking into account illuminant A and the CIE 1964 reference observer (10°).

[0318] In this text, the term tinted means the coloured aspect in transmission, characterized in particular by the colourimetric coordinates (L* ), a*, b*, calculated from the spectrum in transmission between 380 and 780 nm taking into consideration the illuminant D65 as well as the CIE 1964 observer (10°).

[0319] The invention also relates to a motor vehicle incorporating the previously defined illuminable laminated glass element, in particular a fixed element (roof, canopy or quarter window, front or rear side window) or a mobile element (front or rear side window).

[0320] In particular the glazed element is tinted via the tinted transparent film (custom-made) and is a roof or a rear side window (movable or fixed).

[0321] In particular the glazed element is clear and is a front side window (movable or fixed).

[0322] For the motor vehicle element (roof in particular) a light transmission of at most 40% or even at most 28% and even at most 8% or 5% in the clear glass is chosen for example and preferably with a tinted transparent film.

[0323] In this application, the term "road vehicle" means a car, in particular a utility vehicle (van, light van, delivery van) under 3.5 tonnes (light utility vehicle) or a truck or a shuttle, small public, private or public transport vehicle.

[0324] The clear glass is a central area.

[0325] This clear glass area generally represents at least 20%, preferably at least 50%, and in particular at least 70%, 80%, 90%, or 95% of the total glazing surface, including areas covered by encapsulation or seals. In other words, the internal opaque masking layer covers an area that generally represents at most 80%, preferably at most 50%, and in particular at most 30%, 20%, 10%, or 5% of the total glazing surface.

[0326] The optical density of the opaque layer is preferably at least 2 and even up to 5.

[0327] The lamination interlayer (at least the upper and / or top interlayer) can occupy at least 70%, 80%, 90%, 95% or even 100% of the glazing surface.

[0328] The second face F2 can be the tin face or the opposite face, or the first face Fl can be the tin face. The third face F3 can be the tin face, or the fourth face F4 can be the tin face.

[0329] Other details and advantageous features of the invention will become apparent from reading the examples according to the invention illustrated by the following figures.

[0330] Figure 1 shows a schematic cross-sectional view of an illuminable laminated glass element 100 of a motor vehicle according to the invention in a first embodiment. Figure 1a shows a detailed view of the prismatic reflector film used to redirect the light in the first embodiment. Figure 1' shows a schematic front view of the illuminable laminated glass element of Figure 1. Figure 1” shows a schematic front view of a variant of the illuminable laminated glass element.

[0331] Fig. 2 represents a schematic cross-sectional view of an illuminable laminated glass element 200 of a motor vehicle according to the invention in a second embodiment.

[0332] Figure 3 shows a schematic cross-sectional view of an illuminable laminated glass element 300 of a motor vehicle according to the invention in a third embodiment. Figure 3a shows a detailed view of the reflective prismatic film used to redirect the light in this third embodiment. Figure 3b shows a detailed view of the reflective prismatic film used to redirect the light in an alternative to this third embodiment.

[0333] Figure 4 shows a schematic cross-sectional view of an illuminable laminated glass element 400 of a motor vehicle according to the invention in a fourth embodiment. Figure 3a shows a detailed view of the prismatic reflector film used to redirect the light in this fourth embodiment.

[0334] Fig. 5 represents a schematic cross-sectional view of an illuminable laminated glass element 500 of a motor vehicle according to the invention in a fifth embodiment.

[0335] Fig. 6 represents a schematic cross-sectional view of an illuminable laminated glass element 600 of a motor vehicle according to the invention in a sixth embodiment.

[0336] Figure 7 shows a schematic cross-sectional view of an illuminable laminated glass element 700 of a motor vehicle according to the invention in a seventh embodiment. Figure 7' shows a schematic front view of the glazing of Figure 7.

[0337] Fig. 8 represents a schematic cross-sectional view of an illuminable laminated glass element 800 of a motor vehicle according to the invention in an eighth embodiment.

[0338] Fig. 8 represents a schematic cross-sectional view of an illuminable laminated glass element 800 of a motor vehicle according to the invention in a variant of the eighth embodiment.

[0339] Fig. 9 represents a schematic cross-sectional view of an illuminable laminated glass element 900 of a motor vehicle according to the invention in a ninth embodiment.

[0340] Fig. 10 represents a schematic cross-sectional view of an illuminable laminated glass element 1000 of a motor vehicle according to the invention in a tenth embodiment.

[0341] It is specified that for the sake of clarity the different elements of the objects represented are not necessarily reproduced to scale.

[0342] Figure 1 represents a schematic cross-sectional view, here lateral, of a luminous laminated element of vehicle 100 according to the invention in a first mode of Realization by peripheral lighting. [Fig. 1] represents a schematic front view of the element of [Fig. 1]. In particular, for a fixed element (canopy) the width is 85cm to 1.4m and the length is 75cm to 1.65m.

[0343] This refers to a laminated car roof, 100, rectangular and domed (in one or more directions), which comprises:

[0344] - a first sheet of glass 1, for example rectangular (of dimensions (1600 x 1100 mm for example), with a first main face 11 corresponding to face Fl, a second main face 12 called face F2, and an edge (longitudinal slices 10 and 10'), face F2 being preferably bare or possibly coated with a transparent functional coating, or even face Fl, the outer glass 1 is clear, in particular a 2.1 mm Planiclear glass

[0345] - a second transparent sheet, preferably mineral glass, 2, here likewise shape and dimensions of the first sheet 1, forming the internal glazing, passenger compartment side, having a third main face 13 or face F3 and a fourth main face 14 or face F4, and an edge (longitudinal slices 20 and 20' - for example a sheet of soda-lime silicate glass, extra clear such as Diamant glass marketed by Saint-Gobain Glass with a TL of at least 91%, of a thickness equal for example to 2.9 mm, glass with a refractive index of 1.52 at 600 nm or Optiwhite glass of 1.95 mm, or Sunmax glass of 2.05 mm

[0346] - between face F2 and face F3, a transparent laminate interlayer 3, with a longitudinal slice 30, aligned or possibly offset from the longitudinal slices 10, 10' towards the center of the glass (therefore recessed), here comprising:

[0347] - an upper interlayer 31, in particular thermoplastic, here based on PVB (with plasticizers, at least 30% by weight), 0.38mm or 0.76mm (in one or two sheets) with adhesive contact on face F2, untinted (clear)

[0348] - a lower interlayer 32 of PVB (with plasticizers, at least 30% in weight), untinted, clear (as transparent as possible and with as few optical defects as possible), 0.38mm or 0.76mm (in one or two sheets) in adhesive contact with face F3, with a refractive index n3 of approximately 1.48 at 600nm, for example PVB with a TL of 99.9%.

[0349] Alternatively, the lower interlayer 32 is based on PVB with no or little plasticizers (in particular less than 5% by weight), in particular MOWITAL film, for example of a thickness of at most 100pm.

[0350] Alternatively, the lower interlayer 32 (uncolored) is based on crosslinked polymer adhesive material in particular adhesive polyacrylate film or adhesive silicone film in particular of at least 30pm or it is an adhesive coating (polyacrylate etc) obtained by depositing on the third face F3 or on the coated substrate or deposited between the third face F3 and the coated substrate (by filling).

[0351] The laminated glass element 100 has an internal masking layer 7 forming a masking frame delimiting a clear area 70 (daylight), here rectangular (see [Fig. 1]') with straight edges. Any local modification of the edges 70 is possible (gradient of points, wider area, etc.). For example, the internal masking layer 7 is:

[0352] - a black enamel on the F2 face

[0353] - or black ink, on one of the faces of the upper intercalated layer of preferably with the face oriented towards the F2 face, ink preferably based on PVB with black pigments if upper intercalated layer 31 PVB.

[0354] -the masking width at the front (front lateral edge side 10a) is, for example, from 10 to 40cm

[0355] -the masking width at the rear (rear lateral edge side 10b) is, for example, from 5 to 25cm

[0356] -the masking width on the long sides (longitudinal edges) is for example from 5 to 20cm, identical or distinct width for the two long sides.

[0357] To optically isolate a lower part (with light guidance and light extraction) and the potentially absorbing and / or diffusing upper part, the laminated glass element 100 further comprises an optical insulating coating 5 on the rear face Fb 52' (side face F3) of a transparent film 5' preferably polymeric and separate from a fluoropolymer.

[0358] For solar control purposes, on the front face Fa 51' (side face F2) the film carries a functional, electron-conducting and transparent coating, 55 which is a silver stack

[0359] The assembly is referred to as a coated substrate. The coated substrate is sandwiched between the upper interlayer 31 and the lower interlayer 32, extends throughout the clear glass area and beyond, its edge 50, 50' being under the masking layer 7.

[0360] Six examples of film with silver 55 stacking are described below.

[0361] Example 1 SiNx ZnO NiCr Agi ZnO (ZnSnOx) SiNx Transparent film (F side)

[0362] Example 2 ZnSnOx

[0363] ZnO NiCr Agi ZnO ZnSnOx Transparent film (Fa side) Example 3

[0364] SiNx ZnO NiCr Ag2 ZnO (ZnSnOx) SiNx ZnO NiCr Agi ZnO (ZnSnOx) SiNx Transparent film (Fa side) Example 4 ZnSnOx ZnO NiCr Ag2 ZnO ZnSnOx ZnO

[0365] NiCr Agi ZnO ZnSnOx Transparent film (Fac side) Example 5

[0366] Si3N4 ZnO NiCr Ag3 ZnO (ZnSnOx) SiNx ZnO NiCr Ag2 ZnO (ZnSnOx) SiNx ZnO NiCr Agi ZnO (ZnSnOx) SiNx Transparent film (F side) Example 6 ZnSnOx ZnO

[0367]

[0368]

[0369] NiCr Ag3 ZnSnOx ZnO ZnSnOx ZnO NiCr Ag2 ZnO ZnSnOx ZnO NiCr Agi ZnO Transparent film (F side) The conditions for the deposition of the layers, which were deposited by sputtering (so-called "magnetron cathode sputtering"), are summarized in Table 2. [Table 2] Table 1 Target Used Deposition Pressure Gas Si3N4 Si:Al at 92:8 wt% 3.2 x 10⁻³ mbar Ar / (Ar + N₂) at 55% SiZrNx Si:Zr:Al 2 x 10⁻³ mbar Ar / (Ar + N₂) at 45% ZnO Zn:Al at 98:2 wt% 1.8 x 10⁻³ mbar Ar / (Ar + O₂) at 63% SnZnOx Sn:Zn (60:40 wt%) 1.5 x 10³ mbar Ar / (Ar + O₂) at 39% NiCr Ni (80 att.) : Cr (20 att.) 2-3 x 10³ mbar Ar at 100% Ag Ag 3 x 10⁻³ mbar Ar at 100% The coated substrate is set back from the edges 10, 10', 20, 20' of the leaves 1, 2 by at least 10 mm. The transparent film and even the coated substrate are here less than 200 µm thick, or at most 100 µm, and are protected at their periphery by one or both of the lower and upper intercalated layers 31, 32 (particularly during lamination). The interface between the two lower and upper intercalated layers 31, 32 may be indistinguishable.

[0370] The optical insulating coating 5 is made of a material, preferably a polymer, comprising a separate matrix of a fluoropolymer with a submillimeter thickness Ei of at least 400 nm and preferably 500 nm or 800 nm, and a layer 50 optionally recessed from the layer of the film 50' without compromising the optical insulating function. The optical insulating coating may be directly applied or applied over a functional sublayer (barrier, etc.), transparent to the film 5.

[0371] The film 5' is transparent and can be clear or tinted, in particular a neutral color.

[0372] The optical insulating coating 5 is transparent and even as transparent as possible.

[0373] In one configuration, the optical insulating coating comprises a crosslinked polymer matrix with said n2 index, preferably of at most 1.42 and even at least 1.35, the matrix preferably being among polyacrylate-based polymers with a fluorinated function, in particular urethane acrylate or fluorourethane acrylate or fluorosilicone acrylate. The thickness is preferably at most 1 Opm or 5 µm or 2 µm and at least 800 nm.

[0374] In one configuration, the optical insulating coating comprises a matrix with a refractive index n2m greater than n2 and less than ni, and preferably with n2m of at most 1.48 (and preferably n2 of at most 1.42 and even of at least 1.35), and comprising (nano)poroses and / or (nano)particles of low refractive index, with a refractive index less than ni, in particular hollow, with a size of at most 300 nm or even 100 nm, for example hollow silica nanoparticles. The thickness is preferably at most 1 Opm or 5 pm and at least 800 nm.

[0375] The matrix is ​​a crosslinked polymer or thermoplastic, in particular chosen from polymers based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, PVB or minerals, especially silica. A polymer matrix based on polyacrylate, polyurethane or even polyepoxides, polyvinyl acetate, or polyester is preferred.

[0376] Alternatively, the 5' film is an ultra-thin glass and / or the 5' coating is porous silica.

[0377] To avoid creases and undulations, preferably the coated substrate can be in an area of ​​the element with a curvature, a limited sphericity, in particular with a radius of curvature of at least 1.5 m. For example, slice 50 can be sufficiently far from slices 1 and 2. The masking width on the sides and / or front and rear can be adjusted (increased) for this purpose.

[0378] For example, the 5' transparent film is a clear PET of less than 200pm, in particular 100pm or 75pm, with a TL of about 90% or more.

[0379] For the light function, the laminated glass element 100 further comprises, masked from the outside by the internal masking layer 7:

[0380] - light-emitting diodes 4 (here front-emitting) on ​​a support 40 (by (e.g., PCB) opposite (or offset from) the fourth main face 14,

[0381] - on the third main face F3, a local light redirection element, peripheral such as a prismatic reflector film 8,

[0382] For example, the reflective prismatic film is a polymer prismatic film 8, as shown in detail in [Fig. 1a] with:

[0383] - a flat part 81 (substrate for example PET of at most 100 µm) glued or fixed by suction on the third side F3 13,

[0384] - and a textured layer (embossing etc.), partially or even fully textured, forming prisms 82 which become reflectors by a reflective layer 83 for example metallic (by conformal deposition on the prismatic textured surface).

[0385] Here the prismatic reflective film 8 is glued by a glue 60 on the third main face F3, it can also be held by suction.

[0386] The microprisms are schematically in cross-section as right triangles, but the apex angle can be adjusted to better direct light towards the extraction means. Similarly, the principal direction of emission of the light source can be adjusted.

[0387] For example, a transparent prismatic film (then on the fourth side) comprises a transparent thermoplastic film, for example based on polyethylene terephthalate (PET), on which the transparent prisms are formed from a polyacrylate (a resin crosslinked, for example, by UV). For the reflective prismatic film, a metallic layer is added (conformal coating).

[0388] The prismatic reflective film 8 is in adhesive contact here with the lower interlayer 32. The prismatic reflective film 8 forms a longitudinal band like the linear type light source 4 along a longitudinal edge of the element for example as seen in [Fig.1]'.

[0389] Alternatively, the prismatic film 81,82 is a monolithic polymer film, for example preformed, and the reflective layer 83 is applied.

[0390] The light from the diodes is refracted in the second glass, in the prismatic reflector film 8, and then redirected at a given angle towards the light extraction means 6, here on the third face F3, for example, diffusing ink, as transparent as possible if desired, and into the clear glass. The light rays propagate by total internal reflection at face F4, and

[0391] -for some by total internal reflection at the interface between the lower laminated interlayer 32 and the second sheet up to the extraction means (via the surface on the face side F3)

[0392] -and even for others at the interface between the interlayer of the lamination 32 and the optical insulating coating 5 and reach the diffusing means via the surface face F2).

[0393] The prismatic reflective film 8 is here under the optical insulating coating 5, under the coated substrate. As a precaution to avoid stray light passing through the film and even the masking layer 7, an optional internal opaque element 7' is added opposite the prismatic film 8 (of the same width and not exceeding the inner edge 80' of the film 8), here an opaque (black) ink on the front face 51' of the film 5' or a black PET film glued or placed on top.

[0394] In particular, the solar control coating 55 is edged or is underlying (in contact with) internal opaque element 7'.

[0395] Alternatively, a prismatic film transparent on the F4 face side, downstream of the diodes, is chosen.

[0396] The diodes and / or their support can be fixed to face F4 (by an additional part etc). Alternatively, the diodes are side-emitting.

[0397] The means can therefore be doubled by adding another light source 4' on its support 40', another prismatic reflector film 8' along the other longitudinal edge 10' as seen in [Fig. 1]. The longitudinal edges 10, 10' are not parallel here. In particular, on each side, there can be a set of diode strips on supports 40, either disjointed or connected to each other. They can also be placed on the front or rear edges.

[0398] The extraction means 6 are, for example, extended or point geometric patterns, in particular with a width of no more than 10mm to avoid the shading phenomenon.

[0399] For example, the distance between the extraction means extraction 6 and the diodes (or the prismatic film 8) is at least 10mm or 40mm.

[0400] For example, the extraction means 6 comprise a diffusing coating (a network of disjointed and / or interconnected patterns) in contact with face F3 and covering at most 40% of the clear glass area to promote adhesion with the second sheet 2. The diffusing coating is deposited on face F3 (for example, a semi-transparent enamel) or on the main face of the lower PVB 32 layer oriented towards face F3 (a diffusing resin, for example). The diffusing coating 6 (polymer, mineral) is deposited by liquid means (by inkjet printing, screen printing, etc.).

[0401] For example, the diffusing coating is on face F3 (or even F4), for example with an acrylate matrix, preferably with a refractive index greater than or equal to ni, with TiO2 particles of at least 100 nm in diameter and preferably of at most 1 pm or 400 nm. It is 100 pm to 100 pm or even 50 pm thick. The diffusing coating (for example, based on PVB with TiO2 particles of 100 to 200 nm in diameter) is alternatively deposited on the face oriented towards face F3 of the lower interlayer layer 32 PVB.

[0402] Alternatively, the diffusing coating (for example, based on PVB with TiO2 particles of 100 to 200nm in diameter) is deposited on the face facing face F2 of the lower interlayer 32 in PVB, and is then in contact with the optical insulating coating 5. For example, the diffusing coating (network of disjoint and / or interconnected patterns) in contact with the optical insulating coating covers at most 50% of the clear glass to promote the adhesion of the optical insulating coating with the lower interlayer 32.

[0403] The luminous glazing 100 can have a plurality of extraction zones 6, notably of a given geometry (rectangular, square, round ...). As an alternative to the diffusing layer 6 (enamel, ink, screen-printed or inkjet printed etc.) it can be a film, locally, placed or glued locally on the third face F3 or even fourth face F4 (prismatic film or with diffusing layer or mass diffusing) or between the lower intercalated layer PVB 32 and the film 5'.

[0404] Alternatively, the light source may be one or more primary sources (diodes etc.) coupled directly to a guide, along coupling slice, for example optical fiber extractor with light output zone.

[0405] You can choose diodes emitting white or colored light for ambient lighting, reading...

[0406] Several series of diodes 4 (one edge, two edges, three edges, all around the periphery) can be provided, controlled independently and even of different colors.

[0407] For the manufacture of the element, one can:

[0408] - stack the different elements 31, 5' with 5 and 55, 32 on the second sheet of glass 2 then proceed with the lamination

[0409] - or stack the different elements 32, 5' with 5 and 55, 31 on the first sheet of glass 1 then proceed with the lamination.

[0410] Fig. 2 represents a schematic cross-sectional view of an illuminable laminated glass element 200 of a motor vehicle according to the invention in a second embodiment.

[0411] This element 200 differs from the preceding element 100 in that: - another 4' light source is added on a 40' support, along with another 8' prismatic reflective film on an opposite (or alternatively adjacent) edge, and an internal opaque element is added.

[0412] - the internal opaque elements 7' are on the rear face 52' of the 5' film, on the Optical insulating coating 5 (or locally removed), for example black ink or black PET glued or laid

[0413] - an IR 17 reflective coating facing F4, forming a low layer emissivity.

[0414] In addition, a protective transparent layer 53, in particular polymeric, with a refractive index greater than n2, a submillimeter thickness, and even a thickness of at most 100 pm or even 30 pm, is placed on and covers the optical insulating coating 5, particularly for mechanical protection purposes if the optical insulating coating contains (nano)porosity and / or low-index (nano)particles, especially hollow ones. This protective transparent layer is here a protective coating 53, deposited on the optical insulating coating 5. It may be the same matrix as the optical insulating coating 5 without the (nano)porosity and / or low-index (nano)particles.

[0415] Optionally, the diffusing coating 6, for example a set of patterns of identical width, is not on face side F3 or face side F4 but is printed on the face of the lower PVB interlayer 32 on face side F2 so in local contact with this protective transparent layer 53.

[0416] Alternatively, the film 5' is an ultra-thin glass (UTG) and / or the optical insulating coating 5 is porous silica and the protective coating 53 is dense silica, for example coatings 5, 53 obtained by sol-gel process.

[0417] The infrared-reflecting coating 17, transparent, single-layer or multi-layer, comprises at least one electrically conductive functional layer, for example of a transparent conductive oxide, in particular ITO. This infrared-reflecting coating preferably comprises a dielectric sublayer, in particular silicon (oxy)nitride, and preferably comprises a dielectric toplayer, in particular silicon (oxy)nitride.

[0418] Fig. 3 represents a schematic cross-sectional view of an illuminable laminated glass element 300 of a motor vehicle according to the invention in a third embodiment.

[0419] This element 300 differs from the first element 100 in that:

[0420] - the prismatic film 8 has been moved and reversed (detail view in [Fig. 3a] or 3b (as an alternative) on the rear face 52' particularly on layer 5 or layer 5 is edged 5 (or locally removed)

[0421] - possibly, if necessary, an internal masking layer 71 is on face F4 14 without hindering the injection of light source 4 (width possibly locally reduced)

[0422] - possibly the diffusing coating 6 is on face F4 14, for example a e-mail.

[0423] An adhesive 60 is used to fix the prismatic film 8; in particular, the flat part 81 (substrate, for example, PET of at most 100 µm) is tinted (black) and thus serves as an internal opaque element ([Fig. 3a]); or alternatively, the adhesive 60 is black and thus serves as an opaque element The internal and flat part 81 (substrate, for example PET of at most 100 µm) is, for example, clear. And even a film can be textured (hence the dotted line between 81 and 82).

[0424] Fig. 4 represents a schematic cross-sectional view of an illuminable laminated glass element 400 of a motor vehicle according to the invention in a fourth embodiment.

[0425] This element 400 differs from the first element 100 in that:

[0426] - the prismatic film 8 has been moved (detail view in [Fig.4a]) to the rear face 52' particularly on layer 5 or layer 5 is edged (or locally removed)

[0427] - the internal opaque element 7' is on the rear face side 52' of the film 5', on the coating optical insulator 5 (or locally removed) in the form of a black glue 60 used to fix the prismatic film 8 (detail view in [Fig.4a]) thus fixed to the coated substrate, still under the internal masking layer 7, outside the clear glass 70.

[0428] Fig. 5 represents a schematic cross-sectional view of an illuminable laminated glass element 500 of a motor vehicle according to the invention in a fifth embodiment.

[0429] This element 500 differs from the first element 100 in that:

[0430] - the optical insulating coating 5 is protected by a protective layer 53 (by (example similar to that described in [Fig.2])

[0431] - the reflective prismatic film 8 is between the upper interlayer 31 and the lower interlayer 32, especially in adhesive contact with these layers (but we can add an adhesive for example black on the F3 face side).

[0432] The internal opaque element 7' is omitted.

[0433] We have doubled light source and prismatic film reflectors 4',40', 8'.

[0434] The inner edge 80' of each prismatic reflector film 8, 8' is at most 4mm, preferably at most 1mm from the outer edge (of the 50 edge) of the optical insulating coating 5 and is even in contact with the 50' edge of the film 5'.

[0435] Optionally, the diffusing coating 6, for example a set of patterns of identical width, is not on face side F3 or face side F4 but is printed on the face of the lower PVB interlayer 32 on face side F2 so in local contact with the protective layer 53. Alternatively, the diffusing coating is deposited on the protective layer.

[0436] Fig. 6 represents a schematic cross-sectional view of an illuminable laminated glass element 600 of a motor vehicle according to the invention in a sixth embodiment.

[0437] This element 600 differs from the preceding element 500 in that:

[0438] - the prismatic reflective film 8 is reversed, reflective layer 83 in contact adhesive with the lower interlayer 32 (but part 81 can be tinted as described in [Fig.3] a),

[0439] - a low-emissivity coating 17 is opposite F4

[0440] We can double the light source and prismatic film reflectors 4',40, 8'.

[0441] The diffusing coating 6, for example a set of patterns of identical width, is on face F3 or printed on the face of the lower PVB interlayer 32 on the side of face F3 or alternatively on the side of face f2 so in local contact with the protective layer 53. Alternatively, the diffusing coating is deposited on the protective layer.

[0442] The protective layer is optional.

[0443] Figure 7 represents a schematic cross-sectional view of a laminated glass element illuminable 700 of motor vehicle according to the invention in a seventh embodiment. Figure 7 shows a schematic front view of element 700.

[0444] This 700 roof differs from the first 100 roof in that the 5' film is 200pm or more and to compensate for this large thickness an interlayer frame layer 34 is added, in PVB, here clear.

[0445] The inner edge 80' of the prismatic film 8 is aligned with the edge 50 of the coated substrate, and even with the optical insulating coating 5. The internal opaque element 7' is between the interlayer frame layer made of PVB 34 and the lower interlayer layer 32, always aligned with the prismatic film 8. It can be black PET or black ink on PVB 34 or 32. Alternatively, the frame layer is made of opaque PVB.

[0446] As with [Fig.6], alternatively the reflective prismatic film 8 can be reversed and placed between the frame layer (clear or opaque) and the lower interlayer layer 32.

[0447] We can also use the locations of the prismatic reflector film 8 described in figures 3 or 4. We can duplicate the means 8, 4, 40.

[0448] In another configuration, this element 700 is a rear side window, notably a movable one. Layer 7 is optional, layer 7' is optional. In particular, a neutral color, especially gray, is chosen for the frame layer 34, and for the film 5', a gray-tinted PET with the smallest possible color difference. The upper band of the gray PVB is visible when the window is open; the other bands can be masked by the sealing gasket (not shown). The light source is concealed within the door. For example, the width of the frame layer 32 is at least 10 mm or 20 mm. The PVB 32 is available with or without plasticizers. Layer 6 can be positioned to the side or opposite F3 or F4. For example, layer 6 could be a sign in the lower part, a pictogram, etc.

[0449] Fig. 8 represents a schematic cross-sectional view of an illuminable laminated glass element 800 of a motor vehicle according to the invention in an eighth embodiment.

[0450] This element 800 differs from the previous roof 700 in that:

[0451] - a light source and 4', 40' and 8' prismatic film have been added and these elements are under the film 5'

[0452] - the internal opaque elements 7' are as in [Fig. 1] on the front face 51'

[0453] - the lower interlayer 32 is the same size as the film 5', for example a PVB sheet (interface possibly indistinguishable with frame layer 34) or is a PSA pressure-sensitive optical adhesive coating or a PSA pressure-sensitive film, for example polyacrylate of at least 30pm.

[0454] The frame layer 34 is therefore thicker and comes into contact with the third face F3 13.

[0455] Alternatively, the 5' film is sufficiently thin, for example less than 200pm, and the frame layer 34 is removed, and the 5' film is protected by thinning the upper interlayer layer 31.

[0456] We can also refer to the locations of the prismatic reflector film 8 described in figures 3 or 4.

[0457] In another configuration, this element 800 is a rear side window, notably a movable one. Layer 7 is optional, layer 7' is optional. In particular, a neutral color, especially gray, is chosen for the frame layer 34, and for the film 5', a gray-tinted PET with the smallest possible color difference. The upper band of the gray PVB is visible when the window is open; the other bands can be masked by the sealing gasket (not shown). The light source is concealed within the door. For example, the width of the frame layer 32 is at least 10 mm or 20 mm. The PVB 32 is available with or without plasticizers. Layer 6 can be positioned to the side or opposite F3 or F4. For example, layer 6 could be a sign in the lower part, a pictogram, etc.

[0458] Fig. 8 represents a schematic cross-sectional view of an illuminable laminated glass element 800 of a motor vehicle according to the invention in a variant of the eighth embodiment.

[0459] This element 800' differs from the preceding element 800 in that:

[0460] - light source and prismatic film reflectors 4', 40' and 8' have been added

[0461] - we moved light sources and prismatic films 4, 4', 40, 40' further to the edge, 8.8' below the frame layer 34

[0462] - the internal opaque elements 7' are on the frame layer

[0463] Alternatively, films 8, 8' are between the upper interlayer 31 and the frame interlayer 34, and even reversed (with the flat part tinted for example)

[0464] Alternatively, the 5' film is sufficiently thin, for example less than 200pm, the frame layer 34 is removed and the 5' film is protected by thinning the upper interlayer layer 31.

[0465] In another configuration, this element 800' is a rear side window, notably a movable one. Layer 7 is optional, layer 7' is optional. In particular, a neutral color, especially gray, is chosen for the frame layer 34, and for the film 5', a gray-tinted PET with the smallest possible color difference. The upper band of the gray PVB is visible when the window is open; the other bands can be masked by the sealing gasket (not shown). The light source is concealed within the door. For example, the width of the frame layer 32 is at least 10 mm or 20 mm. The PVB 32 is available with or without plasticizers. Layer 6 can be positioned to the side or opposite F3 or F4. For example, layer 6 could be a sign in the lower part, a pictogram, etc.

[0466] Fig. 9 represents a schematic cross-sectional view of an illuminable laminated glass element 900 of a motor vehicle according to the invention in a ninth embodiment.

[0467] This element 900 is a roof which differs from the seventh element 700 in that:

[0468] - a light source and prismatic reflector film of 4', 40' and 8' have been added and by example of an 8' reflective film flipped between the frame interlayer 34 and the lower interlayer 32

[0469] - the PVB 34 interlayer frame here is opaque by a TL of at most 5% or even 0%

[0470] Optionally, the diffusing coating 6, for example a set of patterns of identical width, is not on the F3 face (or F4 face) but is printed on the face of the PVB 32 on the F2 face so in local contact with the optical insulating coating 5 or even deposited on it as an alternative.

[0471] Alternatively, the prismatic reflective films 8, 8' are both between the frame interlayer 34 and the lower interlayer 32 preferably reversed (with the transparent flat part untinted or tinted).

[0472] In another configuration, this element 900 is a rear side window, notably a movable one. Layer 7 is optional. In particular, a neutral color, especially gray, is chosen for the frame layer 34, and a gray-tinted PET film 5' with the smallest possible color difference is chosen. The upper band of the gray PVB is visible when the window is open; the other bands can be masked by the sealing gasket (not shown). The PVB 32 is with or without plasticizers. For example, the width of the frame layer 32 is at least 10 mm or 20 mm. The light source is masked in the door. Layer 6 can be moved to the side or to face F3 or F4. For example, layer 6 is a sign in the lower part, pictogram, etc.

[0473] Fig. 10 represents a schematic cross-sectional view of an illuminable laminated glass element 1000 of a motor vehicle according to the invention in a tenth embodiment.

[0474] This element 1000 differs from the first element 100 in that the light source (here with lateral emission for example) is optically coupled by the edge of the glass sheet 2. The film 8 and the means 7' are omitted.

Claims

1. Demands Illuminatable laminated glass element for a vehicle, particularly a road vehicle (100 to 1000), especially a roof or side window, comprising: - a laminated glass, preferably curved, transparent, comprising: - a first sheet (1), transparent, made of mineral glass, with a first main face Fl (11), a second main face F2 opposite (12) and a first slice (10), intended to form the outer glass, - a polymer laminate interlayer (3, 31, 32, 34) comprising an upper interlayer layer (31), in particular in adhesive contact with the second face F2 or with a functional transparent coating on the face F2, and a lower interlayer layer (32) with a refractive index n3 in the visible, - a second transparent sheet (2), made of mineral glass or polymer, with a third principal face F3 (13), a fourth opposing principal face F4 (14) and a second slice (20), - a transparent optical insulating layer (5), with a refractive index n2 in the visible range, an optical insulating layer of submillimeter thickness Ei and of at least 400 nm, which is between the upper interlayer (31) and the lower interlayer (32) and which is in particular in adhesive contact with the third face F3 or with a functional transparent coating on the face F3 characterized in that the laminated glazing comprises a coated substrate, between the upper interlayer (31) and the lower interlayer (32), which includes: - a transparent film (5'), made of a material distinct from a fluoropolymer, with a main front face Fa (51') oriented towards face F2 and an opposite main rear face Fb (52') oriented towards face F3, of submillimeter thickness Ef, - a functional coating (55) comprising at least one silver-based functional metallic layer, and preferably dielectric coatings each comprising at least one dielectric layer, such that each functional metallic layer is disposed between two dielectric coatings, the functional coating being on the front face Fa of the transparent film, in particular in adhesive contact with the upper interlayer - the optical insulating layer which is an optical insulating coating (5), made of material comprising a matrix distinct from a fluoropolymer, on the rear face Fb and a slice (50), in particular in adhesive contact with the lower interlayer and in that: - the second sheet has a refractive index ni in the visible, n2 is less than ni, the difference in refractive indices nl-n2 being at least 0.06 in the visible.

2. Illuminatable laminated vehicle glass element (100 to 1100) according to the preceding claim characterized in that the difference in refractive indices nl-n2 is at least 0.08 in the visible and in that the thickness Ei is at least 500nm, and even at least 800nm.

3. Illuminatable laminated vehicle glass element (100) according to any one of the preceding claims characterized in that the transparent film, preferably polymer, is tinted, the lamination interlayer and the first sheet are clear and the second sheet is extra clear.

4. Illuminatable laminated vehicle glazing element (100) according to any one of the preceding claims characterized in that the transparent film, in particular polymer, is tinted in particular with colorimetric coordinates such as lal and lbl < 5; and preferably - the laminated glazing is a roof in particular having a light transmission of 5% to 40%, - the laminated glazing is a side glazing in particular rear, movable or fixed, in particular having a light transmission of 20% to 60%.

5. Illuminatable laminated vehicle glass element according to any one of the preceding claims characterized in that the functional coating comprises two or three silver-based metallic layers, and preferably each dielectric coating located below a functional layer comprises a zinc oxide-based layer located below, in contact with, or separated by a blocking layer from the functional layer and / or each dielectric coating located above a functional layer comprises a zinc oxide-based layer located above, in contact with, or separated by a blocking layer from the functional layer.

6. Illuminatable laminated vehicle glazing element according to any one of the preceding claims, characterized in that the optical insulating coating (5) comprises a cross-linked polymer matrix with said index n2, preferably of no more than 1.42, matrix preferably among polyacrylate-based polymers with fluorinated function, in particular urethane acrylate or fluorourethane acrylate or fluorosilicone acrylate or in that the optical insulating coating comprises a matrix with a refractive index n2m greater than n2 and less than ni, and preferably with n2m of no more than 1.48 and n2 preferably of no more than 1.42, and comprising (nano)porosities and / or (nano)particles of low index, of refractive index less than ni, in particular hollow, of size of no more than 300nm.

7. Illuminatable laminated vehicle glass element according to the preceding claim characterized in that the matrix is ​​organic, in particular crosslinked polymer or thermoplastic, in particular selected from polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, PVB, or in that the matrix is ​​mineral in particular silica.

8. Illuminatable laminated vehicle glass element according to any one of the preceding claims characterized in that it comprises a protective transparent layer (53), of refractive index greater than n2, of submillimeter thickness and even of at most 100pm, covering the optical insulating coating, protective transparent layer in contact with the lower interlayer layer and even with a diffusing coating (6) forming means of light extraction.

9. Illuminatable laminated vehicle window according to any one of the preceding claims characterized in that the transparent film (5') is recessed from the first or second layer, in particular by at least 10 mm, and in particular the thickness Ef of the transparent film (5) is at least 0.2 mm and the window comprises an interlayer frame (34), in particular PVB, framing the periphery of the coated substrate and in particular between faces F2 and F3,

10. Illuminatable laminated vehicle glass element according to any one of the preceding claims characterized in that the transparent film, in particular polymer, is tinted with colorimetric coordinates such as lal< 5 and lbl< 5.

11. Illuminatable laminated vehicle glazing element according to any one of the preceding claims characterized in that the transparent film (5') is a polymer, thermoplastic or cross-linked polymer, in particular polyester, polyethylene terephthalate PET, poly(butylene terephthalate) PBT, poly(ethylene naphthalate) PEN, or polyacrylate, polybutylacrylate, polymethacrylate, preferably the transparent film has a thickness Ef of at least 30pm and preferably less than 200pm.

12. Illuminatable laminated vehicle glass element according to any one of the preceding claims characterized in that it comprises a light source (4) in optical coupling with the second sheet, and preferably light extraction means (6), which preferably partially cover a clear glass area of ​​the glass element and / or preferably on the third face F3 side, in particular comprising a diffusing coating, in particular local or discontinuous, in particular on the third face F3 side.

13. Illuminatable laminated vehicle glass element according to any one of the preceding claims characterized in that it comprises, under the optical insulating coating, in particular on face F4 or between the optical insulating coating and the second sheet, light extraction means (6) preferably comprising a diffusing coating, preferably transparent, with a binder and diffusing particles, binder preferably having a refractive index n5 greater than or equal to ni, in particular of at least 1.48 and in that preferably the lower interlayer or the second sheet is the substrate of the diffusing coating, optionally in contact with the optical insulating coating.

14. Illuminatable laminated vehicle glass element according to the preceding claim characterized in that the binder of the diffusing coating is organic, in particular crosslinked polymer, selected from polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane.

15. Illuminatable laminated vehicle glass element according to any one of claims 13 or 14 characterized in that the binder of the diffusing coating is a polyacrylate polymer, and the binder of the optical insulating coating is a polyacrylate polymer in particular polyacrylate with fluorinated function and / or with low index nanoparticles or nanoporosity and in particular the diffusing coating is on the optical insulating coating, in particular directly or on a protective coating preferably polyacrylate polymer.

16. Illuminatable laminated vehicle glass element according to any one of the preceding claims, characterized in that it comprises, on the fourth face F4, a light source (4,4'), preferably an array of light-emitting diodes, and a light redirection element (8, 8'), in particular prismatic, which is reflective and on the third face F3, in particular comprising reflective prisms oriented on the face F2 or face F3 or in that the light redirection element (8, 8') is transparent, on the fourth main face F4 and is preferably a transparent prismatic element comprising prisms or is a prism.

17. Illuminatable laminated vehicle glass element according to any one of the preceding claims characterized in that it comprises, a light source, preferably an array of light-emitting diodes, on the fourth face F4 side, and a light redirection element (8, 8'), which is a prismatic reflector element, comprising reflector prisms, on the third face F3 side, reflector prisms oriented towards face F2 or face F3 or is preferably a transparent prismatic element comprising prisms or a prism and in that the light redirection element is: - at least partially opposite the optical insulating coating - or at most 4mm, preferably at most 1mm, from the optical insulating coating.

18. Illuminatable laminated vehicle window according to the preceding claim, characterized in that the light redirection element is a prismatic reflector element, comprising reflector prisms, arranged on the third principal face F3, the reflector prisms oriented towards face F2 or face F3, and is: - on the third face F3, in particular in contact with the lower interlayer or a frame interlayer; - in the laminate interlayer, in particular a PVB-based interlayer: - embedded in the lower interlayer (31), in particular a PVB-based interlayer, or in a frame interlayer around the perimeter of the coated film, in particular a PVB-based frame interlayer; - on the lower interlayer, between the lower interlayer (32), in particular a PVB-based interlayer, and the upper interlayer (31), which may be clear or a clear, tinted, or even opaque frame interlayer around the perimeter of the coated film. - on the back face Fb.

19. Illuminatable laminated glass element of a vehicle according to any one of the preceding claims, characterized in that it comprises at least one of the following functional elements: -an internal masking layer (7), peripheral, opaque, between the second face F2 and the third face F3, and even covering the perimeter of the optical insulating coating and even the coated substrate, particularly in contact with the second face F2, defining a clear window - an inner, peripheral, opaque masking layer on the fourth face F4, in particular congruent with or narrower than the width of the inner masking layer, - an internal peripheral opaque element (7') which is between the second face F2 and third face F3, in particular for internal masking of a light source and a light redirection element (8) - an external electroconductive coating (17), in particular infrared reflective, on the fourth face F4 of the second mineral glass sheet, such as a stack with a transparent conductive oxide-based functional layer, and preferably dielectric coatings each comprising at least one dielectric layer, so that the transparent conductive oxide-based functional layer is disposed between two dielectric coatings.

20. A vehicle, in particular a road vehicle, incorporating an illuminable laminated glass element according to one of the preceding claims.

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