Illuminable laminated sunroof for a vehicle, vehicle having such an illuminable laminated sunroof

Abstract

The invention relates to an illuminable laminated sunroof (100) for a vehicle, having an optical insulating coating (5) on a non-fluoropolymer transparent film (5') within the lamination interlayer (3).

Description

[0001] DESCRIPTION

[0002] TITLE: ILLUMINABLE LAMINATED GLASS ROOF FOR VEHICLE, VEHICLE WITH SUCH AN ILLUMINABLE LAMINATED GLASS ROOF

[0003] The present invention relates to an illuminable laminated glass roof for a vehicle, in particular a laminated glass roof for a road vehicle with light-emitting diodes.

[0004] Light emitting diodes have been used for automotive glass roofs, including panoramic laminated roofs with LED lighting as described in WO2010049638. The light emitted by the diodes is introduced edgewise into the inner glazing forming a guide, the light being extracted from the glazing by a diffusing layer on the glazing.

[0005] To improve light extraction, document WO2015118279 proposes a luminous laminated vehicle roof integrating within the thermoplastic lamination interlayer a fluoropolymer film with a thickness of at least 600nm, with a refractive index n2 to 550nm, the internal glass being a light guide with a refractive index n1, n1-n2 being at least 0.08, the fluoropolymer film then forming an optical isolator between the internal glass and a tinted element such as the external glass.

[0006] The present invention sought to develop an alternative illuminated laminated glass roof for a vehicle.

[0007] To this end, the present invention relates to an illuminated laminated glass roof for a vehicle, in particular a road vehicle (automobile: car, truck, public transport: bus, coach, etc.) or a rail vehicle (trains, metros, trams), comprising laminated glazing (preferably curved) - transparent (at least in one (central) window clear) - comprising:

[0008] - a first (curved), transparent sheet of mineral glass, possibly tinted in particular gray or green, intended to form the outer glass, with a first main face F1 (intended to be oriented towards the outside of the vehicle), in particular bare, and a second opposite main face F2 bare or coated with a transparent functional coating (in the clear of the window) and a first slice, in particular transparent functional coating with a thickness of at most 1 pm or 200 nm, for a road motor vehicle and even a car with a thickness preferably of at most 4 mm, or even of at most 2.5 mm, even of at most 2.2 mm - in particular 1.9 mm, 1.8 mm, 1.6 mm and 1.4 mm - and even of a thickness of at least 0.7 mm, for example with a refractive index nv of at least 1.5 in the visible

[0009] - a transparent polymer lamination interlayer (at least in the clear glass (central) in adhesive contact with the third face F3 bare or coated and with the second face F2 bare or coated, in particular single or multi-layer and even single or multi-layer comprising an upper interlayer, in adhesive contact with the second face F2 or with a transparent functional coating on the face F2 in the clear glass, in particular a transparent functional coating with a thickness of at most 1 μm or 200 nm,

[0010] - a second (curved) sheet, transparent (at least in the clear window (central), made of mineral or polymer glass, preferably extra-clear (especially in configuration i) to follow), with a refractive index n1 in the visible, with a third main face F3 and a fourth main face F4 opposite, preferably bare or even coated with a functional coating (transparent) in the clear window and a second edge, in particular a functional coating (transparent) with a thickness of at most 1 pm or 200 nm, second sheet preferably made of mineral glass (and even extra-clear), third face F3 facing the outside of the vehicle and fourth face F4 towards the passenger compartment, in particular with a thickness of at least 0.7 mm (to promote light guidance), possibly less than that of the first sheet of glass, even at most 2.2 mm - in particular 1.9 mm, 1.8 mm, 1.6 mm and 1.4 mm - or even at most 1.3 mm or at most 1 mm,the total thickness of the first and second sheets being preferably strictly less than 5 or 4 mm, even 3.7 mm.,

[0011] The laminated glass roof according to the invention comprises an optical insulating layer, with a refractive index n2 in the visible, optical insulating layer, transparent (at least in the clear (central) glass), of submillimetric thickness Ei and of at least 400nm.

[0012] The laminated glass roof according to the invention further comprising a coated substrate which comprises:

[0013] - a transparent film, made of material, preferably polymer, distinct from a fluoropolymer, with a main front face Fa oriented towards the face F2 and an opposite main rear face Fb, of submillimetric thickness Ef, (and a slice),

[0014] - the optical isolating layer which is an optical isolating coating, made of material, preferably polymer, comprising a separate matrix of a fluoropolymer, (directly or on a transparent functional sub-layer) on one of the front faces Fa or back faces Fb then called the coated (or deposited) face and a wafer.

[0015] In a first configuration i), preferably the first sheet and / or the upper interlayer being tinted (in particular in the clear glass), the refractive index n1 is preferably at least 1.48 and at most 1.6, in particular from 1.5 to 1.53 in the visible (in particular glass sheet, preferably extra-clear), the coated substrate is laminated between the second and third faces F2 and F3, and is between the upper interlayer and a lower interlayer (preferably untinted, colorless or otherwise clear) with a refractive index n3 in the visible, in adhesive contact with the third face F3 or with a functional transparent coating on the face F3 (in the clear glass), in particular if n1>n3 n1-n3 is preferably less than 0.05. n2 is less than n1 (and even n3), the difference in refractive indices n1-n2 being at least 0.06 in the visible, and better at least one of the following values: 0.07, 0.08.In this first configuration i), the roof may comprise a third sheet, made of mineral or polymer glass, with a fifth main face F5, a sixth main face F6 and a third slice, in particular with a refractive index n'1 of at least 1.48 and at most 1.6, in particular from 1.5 to 1.53, the third sheet being bonded to the second sheet via another lamination interlayer comprising another upper interlayer and / or another lower interlayer. The coated film (of the substrate) is then relatively far from the third sheet. However, the third sheet may be a light extraction sheet (guided between the optical isolating coating and the extraction zone), for example, diffusing or textured.

[0016] In particular, the injection of light (from one or more light sources is, in a lower part of the roof, under the optical isolating coating (therefore in the direction of the face F4), preferably in the second sheet (via an internal wall of a (through) hole in the second sheet or with injection by the edge or via the fourth face F4 light refracted in the second sheet, as detailed later) and / or the lower lamination interlayer or in the possible third sheet or even under the third sheet (in particular via the face F6, light refracted in the third sheet). The third sheet can be locally textured or diffusing and even sufficiently thick to promote injection into the latter, the guidance, for example a polymer sheet (polymethacrylate PMMA etc.).The roof may comprise (for the injection of light) one or more light sources (peripheral, adjacent and / or opposite edges) in particular one or more series of diodes, possibly each series of diodes being coupled directly to the second glass sheet (in particular by the edge or via the fourth face F4) or to an optical guide, for example an extractor optical fiber with a light exit zone along a coupling edge of the roof (of the second sheet).

[0017] In a second configuration j), the roof may further comprise a third sheet of mineral or organic glass, with a fifth main face F5, a sixth main face F6 and a third edge, third sheet of refractive index n'1 preferably of at least 1.48 and at most 1.6, in particular from 1.5 to 1.53, third sheet bonded with the second sheet via another lamination interlayer comprising another upper interlayer and another lower interlayer in contact with the fifth face F5 and of refractive index n'3 in the visible, in particular if n'1>n'3 n'1-n'3 is preferably less than 0.05.The coated substrate is between the other upper and lower interlayers of said other lamination interlayer (in adhesive contact), at least one element being tinted among the first sheet, interlayer (upper, lower, additional) of the lamination interlayer, the second sheet, the other upper interlayer. n2 is less than n'1 (and even n'3), the difference in refractive indices n'1-n2 being at least 0.05 in the visible and better at least 0.06 or 0.07 or 0.08.In particular, in this second configuration, the injection of light is in a lower part of the roof, under the optical insulating coating, in particular in the third sheet (perforated or injection by the edge or via the F6 face, light refracted in the third sheet) and / or the other lower lamination interlayer (perforated or injection by the edge) or even under the third sheet (addition of a locally textured or diffusing film, for example a polymer film (PMMA etc.).

[0018] The roof may comprise (for the injection of light) one or more light sources (peripheral, adjacent and / or opposite edges) in particular one or more series of diodes, possibly each series of diodes being coupled directly to the third glass sheet (in particular by the edge or via the F6 face) or to an optical guide, for example an extractor optical fiber with a light exit zone along a coupling edge of the roof (of the third sheet).

[0019] The transparent film and the optical insulating coating are not based on a fluoropolymer (defined as having a fluorocarbon-based repeating unit) which adheres poorly to the lamination interlayer or which requires corona treatment for this purpose. According to the invention, the polymer has a non-fluorocarbon repeating unit (in its main chain) but whose secondary functions (grafts, side chain) possibly contain fluorocarbons.

[0020] For the transparent film, one can choose even ultra-thin glass (at most 0.6 mm) and even for the coated substrate an all-mineral solution with a mineral (or hybrid) optical isolator coating, for example for a deposit obtained by liquid method, in particular an (optical isolator coating) nanoporous silica gel sol or MgF2.

[0021] The transparent film may preferably be a polymer film, rather than even ultra-thin glass which can break, and even the coated substrate is an all-polymer solution with a polymer film and a polymer matrix optical isolator coating, for example deposited by liquid means such as printing (by inkjet). By mineral (or hybrid) means the deposition is for example physical in the vapor phase, by sol-gel means.

[0022] Advantageously, to further increase the luminance:

[0023] - the difference in refractive indices n1-n2 or n'1-n2 is at least 0.08 in the visible and better 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,

[0024] - the thickness Ei is at least 800nm, 900nm, 1 pm and preferably less than or equal to one of the following values: 10pm, 5pm, 3pm, 2pm.

[0025] For mechanical strength (in particular if low index nanoparticles and / or porosities in the optical insulating coating) and / or depending on product availability (less easy at very low index), one may want to limit the difference in refractive indices n1-n2 or n'1-n2 and choose at most 0.2 or at most 0.15 and preferably at least 0.10, 0.11, 0.12, this in particular for n1 or n'1 from 1.5 to 1.53 (with second or third glass sheet).

[0026] The coated substrate (and possibly lower interlayer, second sheet or even another lower interlayer, third sheet) has a haze of at most 1°, or even 0.5° (excluding areas with light extraction means). It is preferable to avoid inclusions and pinholes.

[0027] In particular with n1 from 1.5 to 1.53 in the visible (like a sheet of glass), in particular at 600nm and preferably from 500nm to 750nm and even from 380nm to 750nm, n2 and / or the average index n2 m can 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.

[0028] In particular with n1 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, may also be less than or equal to one of the following values: 1.50, 1.49, 1.48, 1.47.

[0029] The optical isolating coating can occupy at least 80%, 90%, 95% and even 100% (unedged) of the surface of the transparent film (deposition face), in particular polymer film (and even thermoplastic).

[0030] The optical isolating coating can have good adhesion to the transparent film (substrate) according to the invention, preferably polymeric (and even thermoplastic).

[0031] For example, the transparent film, preferably polymer (better thermoplastic and even PET), has a smooth surface on the deposition side (Fa or Fb), with low surface roughness (in particular parameter Rz) of at most 1 pm.

[0032] For best optical quality, the thickness Ei of the optical isolator coating varies by at most ±5%. The thickness Ei is preferably as low as possible to avoid high material costs without degrading the optical function.

[0033] The optical insulating coating is transparent (to see the sky) but can be tinted or clear, in particular presenting (alone) a light transmission of at least 80% or at least 90%. The optical insulating coating preferably extends throughout the clear (central) glass of the roof, its edge being in particular under a masking frame layer (ink or enamel, opaque: black etc.) closer to the F2 face than the latter, which is a full opaque layer and possibly with discontinuous opaque patterns (gradient for more transparency towards the center), detailed later.

[0034] The optical isolating coating is preferably a continuous layer (mineral or organic or hybrid, in particular with low index nanoparticles, for example hollow silica) which occupies the entire clear part of the glass and all or part of the coated Fa or Fb face depending on the extent of the film under the masking frame. The optical isolating coating is, for simplicity, a single layer but can be manufactured in one or more passes (by liquid method).

[0035] The optical isolating coating can be topped with a functional (over)layer, in particular a protective layer: diffusion barrier and / or mechanical protection in particular, a film for example of at most 100pm and at least 30pm or a coating for example of at most 10pm. An optical isolating coating can be chosen with a matrix (organic, mineral) and low index nanoparticles (or hollow and / or porous) a dense overlayer (organic, mineral) of the same matrix.

[0036] Preferably, in particular to simplify manufacturing, on the transparent film, preferably thermoplastic or crosslinked polymer, the optical isolating coating may be organic, crosslinked polymer or thermoplastic, and the protective overlayer may be organic, for example thermoplastic or crosslinked polymer.

[0037] In a first embodiment, the optical isolating coating is on the rear face Fb, in particular the transparent film (substrate), in particular polymer and even PET, is clear or tinted. In a second embodiment, the optical isolating coating is on the front face Fa - and the film, in particular polymer and even PET, - carrier, is clear, in particular has a refractive index n4 greater than n2 (and even n3 and n1 or n'3 and n'1). For example n4-n2 of at least 0.05 or even one of the following values: 0.1, 0.2, 0.3.

[0038] The transparent film according to the invention, preferably polymer, does not stick to the glass, it is in adhesive contact with the lamination interlayer (respectively with the other lamination interlayer) which binds the first and second sheets (respectively second and third sheets).

[0039] Thus, in one embodiment, the lamination interlayer (upper interlayer or optional additional interlayer, lower interlayer) or the other lamination interlayer (other upper interlayer, other lower interlayer) is in adhesive contact with the coated substrate on the front face side Fa and on the face side Fb, in particular the adhesive contact can be over the entire surface of the face opposite the coated face (Fa) and in adhesive contact with the entire surface of the optical isolating coating. Optionally a functional coating, in particular diffusing - forming light extraction means -, is on the thermoplastic lower interlayer (PVB) or the other thermoplastic lower interlayer (PVB), local or discontinuous (set of patterns etc.). It can be in contact with the rear face (Fb, bare or with underlayer) or with the optical isolating coating (on the face Fb) or even in contact with the face F3.

[0040] Thus, the lower interlayer (respectively of the other lower interlayer) may comprise a functional coating, on the back side of the coated substrate or on the F3 side, in particular a diffusing coating (forming a light extractor) and preferably transparent (in the off state), in particular partially covering the lower interlayer (respectively of the other lower interlayer).

[0041] And when the optical isolating coating is on the back face Fb, the lower interlayer (respectively the other lower interlayer) is then in adhesive contact with a part of the surface of the optical isolating coating and the functional coating (diffusing, in particular extracting) on ​​the back face Fb is then also in contact with the optical isolating coating. When the optical isolating coating is on the front face Fa, the lower interlayer (respectively the other lower interlayer) is then in adhesive contact with a part of the uncoated face Fb and the functional coating on the back face is then also in contact with the uncoated face Fb.

[0042] For example, this diffusing functional coating (rear face Fb side) facing the face F2 is deposited on the lower thermoplastic interlayer (PVB) (respectively of the other lower thermoplastic interlayer (PVB)) forming light extraction means and preferably occupies at most 50% or 40% of the roof, or of the glass clear, or of the lower interlayer (respectively of the other lower interlayer).

[0043] For example (in configuration i)) this diffusing functional coating is on the face F3 or face side F3 of the lower thermoplastic interlayer (PVB) (respectively of the other lower thermoplastic interlayer (PVB)) forming light extraction means and preferably occupies at most 40% or 30% of the roof, or of the glass clear, or of the lower interlayer (respectively of the other lower interlayer).

[0044] The optical isolating 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 n1 or n'1 of 1.51 to 1.53), clear optical isolating coating or possibly tinted with a coloring agent (molecular or pigment).

[0045] The optical isolating coating may comprise at least 99% by weight of crosslinked polymer, optional photoinitiators, rheological agents.

[0046] The optical isolating coating is preferably deposited by liquid means.

[0047] The surface of the optical insulating coating (before assembly) is non-sticky and involves the use of the lamination interlayer. The surface is in particular then non-sticky to a glass, to the touch. Depending on the deposition face chosen, the upper interlayer or lower interlayer or an additional interlayer of said lamination interlayer is in adhesive contact with said surface or the other lower or upper interlayer is in adhesive contact with said surface.

[0048] The optical isolating coating is in particular a varnish which can be obtained from a photo-crosslinkable resin and with photoinitiators if necessary or even thermo-crosslinkable, a two-component mixture etc. A layer of crosslinkable resin is deposited on the (transparent) film, preferably polymer. Once the material is crosslinked, the free surface is not sticky.

[0049] In particular, the optical isolating coating comprises (is made up of) a crosslinked polymer matrix with said index n2 preferably of at most 1.42 (or 1.4 or 1.35), matrix preferably among:

[0050] - polymers based on polyacrylate (for example to have a refractive index of at most 1.42 or 1.4) with possible fluorinated function (to have the lowest possible refractive index), in particular urethane acrylate or fluoro urethane acrylate or fluoro-silicone acrylate,

[0051] - 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.

[0052] Preferably the optical isolating coating is free of free silicone, volatile silicone component (source of surface pollution).

[0053] The polyacrylate described herein means 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 homopolymeric and / or copolymeric. In this text, polyacrylate includes one or more of polymethyl acrylate, polyethylene acrylate, polypropyl methacrylate, polymethyl methacrylate, polyethylene methacrylate, polyethylene methacrylate, polyethyl methacrylate, polypropyl methacrylate.

[0054] The epoxy polymer described herein refers to the polymer obtained after polymerization of substances containing epoxy bonds. The epoxy polymer includes one or more of bisphenol A epoxy, bisphenol A epoxy, halogenated phenolic epoxy, phenolic epoxy, cycloaliphatic epoxy, bisphenol S epoxy resin.

[0055] The crosslinked polymer material (of the optical isolating coating) may preferably be based on (or essentially consisting of) a polymer associated with one or more other functions such as the acrylate function for photo-crosslinking (crosslinked polymer material based on urethane acrylate or based on silicone acrylate) and / or the fluorinated function to lower the refractive index (crosslinked polymer material based on fluoro-urethane acrylate or fluoro-silicone acrylate). Thus, it is preferred for the crosslinked polymer material of the optical isolating coating to be a polymer preferably based on acrylate, urethane acrylate, or even silicone, silicone acrylate, the polymer also having a fluorinated function.

[0056] Depending on the desired properties, the acrylate function can be used for photo-crosslinking (for a urethane acrylate or a silicone acrylate). The acrylate function allows the photo-crosslinking of the polymer, the skeleton of which is made up of other functions such as urethane.

[0057] The optical isolating coating according to the invention may in particular be a coating obtained by liquid means and obtained from a formulation preferably photocrosslinkable by ultraviolet UV (in particular UVA) or even two-component crosslinking by chemical reaction. Crosslinking by IIV(A) is preferred because crosslinking is faster and the equipment less expensive / more compact than by chemical reaction.

[0058] In a first example of optical isolating coating, a crosslinkable UV resin based on acrylates is deposited on the transparent film, particularly polymer and even PET.

[0059] In a second example of optical isolating coating, a single-component crosslinkable UV resin based on acrylates (urethane acrylate) is deposited on the transparent film, particularly polymer and even PET.

[0060] In a third example of optical isolating coating, a crosslinkable UV resin based on silicone is deposited on the transparent film, particularly polymer and even PET.

[0061] The optical insulating coating (clear or tinted) may include, or even consist of, a matrix with a refractive index n2 m greater than n2 and less than n1 or n'1, and preferably with n2 mof at most 1.48 and n2 preferably of at most 1.42, and comprising (nano)porosities and / or low index (nano)particles, in particular hollow and / or porous particles, of size (external diameter) of at most 300nm or even of at most 100nm, for example hollow and / or porous silica nanoparticles (spheres, etc.). Preferably, the optical insulating coating is free of free silicone or volatile silicone component (source of surface pollution).

[0062] The matrix of the optical isolating coating may be organic, in particular crosslinked polymer or thermoplastic, in particular chosen from polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, PVB or the matrix is ​​mineral in particular silica.

[0063] We can cite the low index polymers already described if we want to further lower n2 by the matrix and (nano)porosities and / or (nano)particles.

[0064] The optical isolating coating comprises in particular at most 60% in volume fraction of (nano)porosities and / or low index (nano)particles or one of the following values: 40, 45%, 40%, 35%, 30%.

[0065] The refractive index n2 can be adjusted to suit the volume of nanopores or low-index or hollow nanoparticles. As a first approximation, the following relationship can be used to calculate the index: n2=f.n2m+(1-f).n e ff where f is the volume fraction of the material constituting the layer and n2 m its refractive index (dense) and n e ff is the refractive index of nanoporosities (equal to 1) or the effective index of nanoparticles (hollow and / or porous or low index).

[0066] The following table 1 illustrates the refractive index n2 as a function of n2m and the volume fraction. [Table 1]

[0067] The mineral optical isolating coating preferably comprises (in particular consists of):

[0068] - sol-gel layer based on porous silica and E1 is at most 1 pm, better at most 800 nm and even 700 nm, to avoid the risk of cracks, n1 can easily go up to 1.3

[0069] - or oxide-based layer (silica etc.) deposited by physical vapor phase PVD such as magnetron sputtering and E1 is at most 1 pm, better at most 700 nm because the deposition is very slow.

[0070] In magnetron sputtering the silica layer can contain one or more elements such as aluminum and the refractive index can be 1.48.

[0071] The proportion of pore volume can be limited and controlled in particular by sol-gel method.

[0072] We can therefore choose silica made from tetraetoxysilane (TEOS).

[0073] The pores can be closed, done by removing a particulate pore-forming agent.

[0074] The structuring of the sol-gel layer into pores is linked to the sol-gel type synthesis technique, which makes it possible to condense the essentially mineral material (i.e. mineral or organic-mineral hybrid) with a suitably chosen pore-forming agent, in particular of well-defined size(s) and / or shape(s) (elongated, spherical, oval, etc.). The laminated glazed roof (in particular the coated film) may comprise a transparent protective layer (film or coating), in particular polymeric (thermoplastic or crosslinked polymer), with a refractive index greater than n2, of submillimeter thickness and even at most 100 pm, (on and) covering the optical insulating coating, possibly protruding from the optical insulating coating. In particular, it protects the optical insulating coating comprising (nano)porosities and / or low-index (nano)particles, in particular hollow, porous (silica, etc.). The transparent protective layer being a mechanical protection:

[0075] - in contact with the lower interlayer or the other lower interlayer and even with a diffusing functional coating, forming light extraction means, (discontinuous or local),

[0076] - or in contact with the upper interlayer or the other upper interlayer, the optical isolating coating being on the front face.

[0077] The transparent film is, for example, a thermoplastic polymer (flexible, curved to follow the curvature of the glazing).

[0078] The transparent film (substrate), in particular polymer, according to the invention preferably has dimensional stability, is compatible with the lamination operation (pressurization, at a given temperature), and is compatible with passage through an autoclave.

[0079] The film (substrate) according to the invention is distinct from a lamination interlayer, binding the sheets, it requires the use of the lamination interlayer. The film (substrate) is preferably a film that is non-sticky at room temperature.

[0080] The edge of the coated substrate (of the transparent film, and even of the optical isolating coating) can be distant from the edge of the first sheet (or of the third sheet) by at least 10mm and even by at least one of the following values: 15mm, 20mm, 25mm, 30mm.

[0081] The edge of the coated substrate (film, optical isolating coating) can be distant from the glass clear by at most 15mm and even by at least one of the following values: 10mm, 8mm, 5mm, 1mm.

[0082] For protection purposes, preferably, the periphery of the transparent film, in particular polymer and even PET, (and even the coated substrate) can be surrounded, in contact (adhesive), with a part of the lamination interlayer (PVB, EVA, TPU etc) for example of a width of at least 5mm:

[0083] - either resulting from the creep of the lower interlayer and / or the creep of the upper interlayer or an additional interlayer

[0084] - either by adding a peripheral frame layer with a thickness in particular greater than or equal to the thickness Ef of the transparent film.

[0085] In one embodiment, the transparent film is set back from the first or second slice by at least 10 mm and even at least 15 mm or 20 mm or 25 mm, in particular the thickness Ef of the transparent film is at least 0.2 mm and the roof comprises an interlayer frame layer, forming part of the lamination interlayer or of the other lamination interlayer framing the periphery of the coated substrate and in particular between the faces F2 and F3 in the first configuration i) or between the faces F5 and F6 in the second configuration j).

[0086] The thickness Ea of the interlayer frame layer can be similar to Ef, for example Ef ±50pm or even ±25pm or even higher for example if the lower interlayer of thickness E' is short (same size as the film) edge to edge with the transparent film, then Ea= Ef+ E'±50pm or even ±25pm.

[0087] The interlayer frame layer is in contact with the upper or additional interlayer or the other upper interlayer and possibly in contact with the lower interlayer or the other lower interlayer.

[0088] We prefer to choose the same material (PVB in particular) for the upper or additional interlayer, lower interlayer.

[0089] A light source (each source if several sources) 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 (each) light redirection element (in particular a prismatic reflector element) can be tinted or even opaque, black in particular to mask any stray light.

[0090] The frame layer can be locally opaque (on a strip) or opaque all around. Furthermore, this laminated glass roof 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.

[0091] In order to avoid folds and undulations, the coated substrate is preferably in an area of ​​the roof with a curvature and a sphericity limited in particular by a radius of curvature of at least 1.5 m.

[0092] The thicker the transparent film, the less likely it is to warp and ripple. For example, a thickness of at least 100 μm can be chosen in the case of a highly spherical area of ​​the roof.

[0093] The coated film (substrate) may be at least 1m long and at least 50cm wide.

[0094] The film (of the substrate), coated, in particular polymer and even thermoplastic, in particular PET, can occupy 100% of the glass clear.

[0095] The film of the coated substrate, in particular polymer and even thermoplastic, in particular PET, can occupy at least 80%, 90% and less than 100% of the surface of the roof (to be protected at the periphery in particular, by a material in particular a lamination interlayer).

[0096] The film of the substrate, coated in particular with polymer, can be of any shape, depending on the design of the roof, with rounded corners etc.

[0097] The transparent film may be a thermoplastic polymer or crosslinked polymer, in particular: - polyester, such as polyethylene terephthalate PET, poly(butylene terephthalate) PBT, poly(ethylene naphthalate) PEN,

[0098] - polycarbonate (PC),

[0099] - polyacrylate, in particular thermoplastic, polybutylacrylate, polymethacrylate PMMA,

[0100] - polyurethane (PU), cross-linked material,

[0101] - cellulose triacetate (TAC),

[0102] - polyolefin: polypropylene (PP), polyethylene (PE),

[0103] - polyimide, polyamide, a film (coextruded) in PET-PMMA,

[0104] - poly(vinyl chloride) PVC.

[0105] We prefer PET (readily available) or PEN, a polyacrylate film, or PC (preferring PVB interlayers without plasticizers or with few plasticizers) or PMMA.

[0106] The transparent film, in particular polymer and even PET, preferably has a thickness Ef of at least 30 pm and / or preferably less than 200 pm, in particular at most 100 pm.

[0107] With a polymer film made of PC or PMMA, it is preferable (for greater chemical compatibility) to avoid PVB as an interlayer in contact with it (lower, additional or upper or even frame) and, for example, to prefer thermoplastic polyurethane (TPU). The same applies to the second or third polymer sheet, made of PC or PMMA.

[0108] The lower (clear) and / or upper (clear or tinted) interlayer, preferably in sheet form, is thermoplastic or crosslinked adhesive material, preferably chosen from polymers based on: poly(vinyl butyral) known as PVB, or ethylene and vinyl acetate copolymer known as EVA (thermoplastic or crosslinked), thermoplastic polyurethane (TPU) or ionomer. An example of a monomer resin is marketed by the Kuraray Company under the registered trademark SentryGlas®. The lower (clear) and / or upper (clear or tinted) interlayer of crosslinked adhesive material is for example a polyacrylate sheet.

[0109] The preferably upper interlayer may be made of anti-UV PVB, for example Eastman anti-UV PVB, called RU41, for example to protect an electroactive layer (electrochromic etc.) or any organic coating or ink.

[0110] The lamination interlayer (one of the lower, upper or additional interlayers) may be acoustic, in particular comprising or consisting of an acoustic PVB (three-layer, four-layer, etc.). Thus, the lamination interlayer may comprise at least one so-called middle layer made of viscoelastic plastic material with vibro-acoustic damping properties, in particular based on polyvinyl butyral and plasticizer, and the interlayer, and further comprising two external layers made of standard PVB, the middle layer being between the two external layers. Mention may be made of the acoustic PVBs described in patent applications WO2012 / 025685, WO2013 / 175101, in particular tinted as in WO2015079159. The upper interlayer may be tinted, in particular with a so-called TL light transmission of at most 73%, in particular tinted PVB.

[0111] An additional interlayer, between the lower (clear) and upper interlayer, can be tinted in particular with a TL of at most 73%, in particular tinted, or even at least 13% (for example to integrate a functional film, an electrically controllable device detailed later).

[0112] The lower (clear) interlayer may in particular have a TL of at least 90% and better still at least 95% or 97%.

[0113] The lower interlayer (in particular PVB or even crosslinked polymer adhesive material) can be the same size as the coated substrate (a framing layer may be necessary depending on the thickness of the coated substrate, in particular from 100 or 200 pm) or larger than the coated substrate. The upper or additional interlayer or a framework interlayer can flow to protect the edges of the coated substrate.

[0114] The interlayer frame, preferably thermoplastic and even PVB-based (with or without plasticizers) can be one or more sheets depending on the thickness and / or the desired color (clear and / or tinted or even opaque sheet)

[0115] The tinted interlayer which is partly in the clear glass is preferably gray.

[0116] The frame interlayer outside the clear tinted window can be gray, black (opaque or almost opaque), preferably thermoplastic and even PVB-based (with or without plasticizers), especially the frame layer.

[0117] For the lamination interlayer (respectively the other lamination interlayer) it is possible to provide an “all PVB” solution, in sheets, or a solution with PVB except for the lower interlayer in crosslinked adhesive material, film or coating, from a crosslinkable adhesive liquid resin, in particular when the second sheet is made of glass (respectively the third sheet of glass) or polymer (PC, PMMA), in particular with an index n3 (or n'3) greater than 1.42.

[0118] For this lower interlayer, we can cite as 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.

[0119] 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 called NOA 65 from the Norland company with a refractive index equal to 1.524, is deposited.

[0120] In another example of a crosslinked polymer adhesive layer in the form of a crosslinked polymer adhesive coating, a single-component crosslinkable UV resin based on acrylate-functional polyfluorene, the product called Shin-A SBPF-022 with a refractive index equal to 1.60, is deposited. The lower interlayer may comprise or even be a crosslinked polymer film, in particular of at least 30 pm or 40 pm or 50 pm.

[0121] In particular, the lower interlayer is a pressure-sensitive film (PSA), which bonds by contact after applying mechanical pressure.

[0122] In particular, the lower interlayer of crosslinked polymer is a crosslinked polymer film, in particular of at least 30 pm, which is preferably in adhesive contact with the third face F3 and in particular:

[0123] - pressure-sensitive film, and preferably chosen from polymers based on acrylate or silicone

[0124] - or a so-called post-adhesive film of partially photocrosslinked polymer before assembly and photocrosslinked (with continued photocrosslinking) after assembly, and preferably a so-called post-adhesive film based on acrylate.

[0125] A PSA film based on acrylate includes the product called CS986 (refractive index 1.49) from Nitto.

[0126] In the first configuration i) the lower lamination interlayer is in particular clear, in particular thermoplastic and / or crosslinked adhesive material, preferably chosen from: EVA, TPU, PVB with at least 20% by weight of plasticizers preferably with a thickness of at least 200 pm and at most 1 mm, PVB or less than 20% by weight of plasticizers or without plasticizers preferably with a thickness of at most 100 pm and in particular with a thickness of at least 25 pm, and the second sheet is made of extra-clear mineral glass or PMMA or polycarbonate (PC).

[0127] In the second configuration j) the other lower interlayer is in particular clear and thermoplastic chosen from: EVA, TPU, PVB with plasticizers with a thickness of at most 380pm, PVB or little or no plasticizers with a thickness of at most 100pm or 50pm and even at least 20pm, and the third sheet is made of extra-clear mineral glass or PMMA or PC.

[0128] The laminated glass roof according to the invention may include one of the following sequences (strict or open):

[0129] - first glass sheet (tinted or clear with electrically conductive coating, reflecting infrared (IR) etc. on F2 side) / upper thermoplastic interlayer (PVB, TPU or EVA) / coated substrate / lower (clear) thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second glass sheet (extra clear)

[0130] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / thermoplastic upper interlayer (PVB, TPU or EVA) / coated substrate / thermoplastic lower interlayer (clear) (preferably TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second polymer sheet (PMMA, PC) - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / thermoplastic upper lamination interlayer (PVB, TPU or EVA) / coated substrate / thermoplastic lower interlayer (clear) (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second glass sheet / other lamination interlayer / third glass or polymer sheet

[0131] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second glass or polymer sheet (PMMA, PC) / other upper thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / coated substrate / other lower (clear) thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / third glass sheet (extra clear).

[0132] For example preferably:

[0133] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic PVB interlayer (clear or tinted) / coated substrate / lower interlayer (clear) thermoplastic PVB or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) with possible functional coating (diffusing) on ​​the back side or F3 side / second glass sheet (extra clear)

[0134] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic PVB interlayer / coated substrate / lower thermoplastic interlayer (preferably TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second polymer sheet (PMMA, PC).

[0135] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic PVB interlayer or adhesive crosslinked polymer material (EVA,) / second glass sheet / other upper thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / coated substrate / other lower thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / third glass sheet (extra clear).

[0136] Naturally, the laminated glass roof can comprise a light source in optical coupling with a light guide arranged under the optical isolating coating (further from the face F2 than the optical isolating coating), and preferably means for extracting light guided in the light guide, which are on the third face F3 or face F4 side in configuration i) or on the fifth face F5 or face F6 side in configuration j).

[0137] When the extraction means (of light) is a diffusing coating (printed ink) on a PVB interlayer or on the coated substrate rather than on the second (or third) glass sheet, it is easier to change the extraction pattern and tooling for printing on a flat film than on curved glass. For mechanical strength and especially to retain the pieces of glass it is also better to have the extraction on a coated substrate or PVB than on glass.

[0138] The (each) light source can be removable, added, sold separately or as a kit.

[0139] The extraction means can be temporary (detachable stickers) and therefore added or replaced, in particular on the fourth side (respectively side F6), or permanent, in particular on the third side (respectively side F5).

[0140] Naturally, the second sheet (respectively the third sheet) can be an operational light guide once their assembly of the (each) light source and the extraction means.

[0141] The (each) light source is preferably a set of light-emitting diodes (on a printed circuit board support such as a PCB for "printed circuit board" in English, for example, flexible), in particular a straight or curved strip.

[0142] Preferably, the diodes are surface-mounted components on the front face of a printed circuit board (PCB) (with conductive tracks). The width (or length) of a diode with a single semiconductor chip, generally a square-shaped diode, is preferably at most 5mm. The width of the PCB, in strip form, is preferably at most 5cm, better still at most 2cm, and even at most 1cm.

[0143] One can have one or more light sources (peripheral, preferably offset from the clear glass), several sets of diodes. The light source(s) can be mono- (emitting in blue, green, red, etc.) or polychromatic, or can be adapted or combined to produce for example white light, etc.; they can be continuous or discontinuous, etc. The light source can be extended linearly (rectangular strip like a bar of diodes) along one side of the glazing (longitudinal edges) or split (with similar or distinct light e.g. different color intensity, controlled independently or simultaneously) along both sides.

[0144] The light extraction means may define at least one first diffusing zone, for example with a width of at least 0.5 mm, in particular a first solid diffusing zone and / or comprising a set of discontinuous diffusing patterns.

[0145] The roof 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 on the periphery of one of the faces to form a luminous frame, logos or patterns, etc.).

[0146] The diffusing zone may be in several zones, for example each with patterns, identical or distinct, continuous or discontinuous, and may be of any geometric shape (rectangular, square, triangular, circular, oval, etc.), and may form a design, a sign (arrow, letter, etc.). In one embodiment, the light extraction means may comprise an extractor film between the optical isolating coating and the third face F3, (respectively the fifth face F5) preferably on the third face (respectively the fifth face F5) or the fourth face F4 (respectively the face F6) in the first configuration i) (respectively the second configuration j)).

[0147] This extractor film can be bonded to the back side Fb of the coated substrate and can be reflective.

[0148] An example of a film with reflective reliefs, in particular a plastic film with a refractive index greater than or equal to n1 with reflective reliefs (prisms) forming light extraction on the third face of an automobile roof, is described in patent WO2013 / 167832.

[0149] Textured polymer films are available on the market, including, for example, the Vikuiti® Image Directing Film II marketed by 3M.

[0150] A silica-based mineral or organo-mineral coating can also be formed with the reliefs, by sol-gel method.

[0151] An extractor film may comprise a plurality of individual prisms, each consisting of an oblique surface and a surface substantially perpendicular to the general plane of the second sheet (respectively of the third sheet).

[0152] Examples of regular relief include a Fresnel lens type relief or a Fresnel prism type relief.

[0153] The extraction film can have a custom-made extent. It can be local or cover at least 50%, 60%, 70% of the clear glass. The extraction film can have one or more local extraction zones (textured etc.) or occupying at least 50%, 60%, 70% of the clear glass (and / or at least 50%, 60%, 70% of the surface of the transparent film). The extraction film can be smaller than the lower interlayer and / or the transparent film.

[0154] The light extraction means may be a frosted area of ​​the second glass sheet (respectively of the third glass sheet) or at least one area etched in the thickness of the second glass sheet (respectively of the third glass sheet) or else diffusing elements, such as glass particles or fibers, incorporated in the lamination interlayer or the other lamination interlayer.

[0155] In short, under the optical isolating coating (further from the F2 face than the isolating coating), means of extracting light, light guided in the light guide, are for example in the form of:

[0156] - laser engraving in the guide (mineral), in particular second sheet or third sheet of glass,

[0157] - texturing (acid attack of glass, etc.), textured film - or coating or diffusing 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 n1 or n3 or to n'1 and n'3, in particular at least 1.48.

[0158] The binder can be a transparent ink

[0159] Preferably the diffusing coating assembly on its substrate (second sheet, third sheet, lower interlayer) has a light transmission of at least 80% and a haze of at most 30%.

[0160] In particular, the roof comprises, under the optical insulating coating, light extraction means, comprising a diffusing coating, preferably transparent, with a binder and diffusing particles, preferably a binder with a refractive index n5 greater than or equal to n1 (or even n3) or n'1 (or even n'3), in particular at least 1.48.

[0161] - in first configuration i) the lower thermoplastic interlayer (PVB) or the second sheet is the substrate of the diffusing coating, (thus on the face F4 or F3 or rear face side Fb), in particular possibly in contact with the optical isolating coating on the rear face Fb

[0162] - in second configuration j) the other lower thermoplastic interlayer (PVB) or the third sheet is the substrate of the diffusing coating, (thus on the face F5 or F6 or rear face side Fb), in particular possibly in contact with the optical isolating coating on the rear face Fb.

[0163] For example, the binder of the diffusing coating is organic, in particular a crosslinked polymer, chosen from polymers based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, or even thermoplastic based on PVB, or even TPU.

[0164] The lower interlayer can be PVB-based and includes 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 without plasticizer such as the “MOWITAL LP BF” film from the KURARAY company.

[0165] When the substrate of the diffusing coating is the lower interlayer, it can be chosen based on PVB without plasticizers or at most 15% or 10% or 5% of plasticizers. For example, the thickness of the lower interlayer forming the substrate is at most 200pm.

[0166] An example of a diffusing coating on a polymer layer, in particular a lamination interlayer and based on PVB, is in document W02021005162.

[0167] An example of a diffusing coating on a PVB or glass lamination interlayer is in document WO2023285743.

[0168] For example, the binder of the diffusing coating is a polyacrylate polymer and the binder of the optical isolating coating is a polyacrylate polymer, in particular polyacrylate with a fluorinated function and / or with low-index nanoparticles or nanoporosity and / or hollow particles, in particular if the coatings come into contact after lamination. Preferably, the diffusing particles (dielectric, organic or mineral, for example metal oxides) have a particle size defined by D90 of less than 2 μm, preferably at least 100 nm and even at most 700 nm, in particular 400 nm ± 100 nm.

[0169] Preferably, the diffusing particles are chosen from non-luminescent particles of TiCh, SiC>2, CaCCh, ZnO, AI2O3, ZrC>2. Preferably, the particles have a (high) refractive index, greater than or equal to 1.8 or even 2 (greater than n5, in particular at most 1.8 or 1.7).

[0170] Preferably, for the manufacture of the diffusing coating, a resin curable under ultraviolet radiation is chosen from a reaction product between a thiol and an alkene (called thiol-ene), an acrylate such as epoxy-acrylate, polyester-acrylate, urethane-acrylate, siliconeacrylate alone or in a mixture of several of them.

[0171] 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.

[0172] A low thickness allows the material cost to be reduced, but the thickness can be adjusted to modify the visibility / luminance compromise of the pattern.

[0173] Preferably the refractive index of any layer according to the invention is defined for a reference value in a range from 550 and 630nm, preferably to 600nm. Preferably the difference in refractive indices n1-n2 or n'1-n2 is verified for the entire visible spectral range of the light source.

[0174] A polymer layer according to the invention (optical isolating coating, diffusing coating, interlayer adhesive 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.

[0175] A crosslinked polymer layer (optical isolating coating, diffusing coating, interlayer adhesive layer) according to the invention may contain a main polymer (or base polymer) at least 50%, 60%, 70%, 80%, 90%, 95% by weight of polymer(s).

[0176] A crosslinked polymer layer according to the invention may comprise other additives (preferably less than 10% or 5% or 1% by weight of layer) such as at least one of the following:

[0177] - crosslinking agent e.g. photoinitiators (residual),

[0178] - plasticizers (for more flexibility)

[0179] - membership promoters

[0180] - additives for durability.

[0181] The polymerization or even crosslinking rate of a crosslinked polymer layer according to the invention is not necessarily 100%, the material may therefore comprise residual prepolymers, monomers, oligomers. The layer after crosslinking can be analyzed by NMR (Nuclear Magnetic Resonance) in order to determine the polymerization rate. It is possible to have a mixture of polymers. In one embodiment, in first configuration i), the roof may comprise a light source, preferably a set of light-emitting diodes, which is optically coupled with the second sheet of preferably mineral glass, in particular forming an optical guide:

[0182] - by a light redirection element, -local-, reflector light redirection element and third main face side F3 or transparent light redirection element fourth main face side F4.

[0183] - by all or part of the second tranche,

[0184] - or by a wall of a hole (through in thickness, closed) of the second sheet (or several walls of several holes), in particular a hole offset from a clear window, facing an internal masking layer.

[0185] In the case of light injection through the second edge, the light source is coupled to the edge of the second sheet, possibly in a peripheral opening notch. The light source may be housed in a polymer encapsulation as described in application WO2010049638, in particular in figure 15 or in figure 16, and even having a recess for removal or replacement of the source.

[0186] In the case of light injection via an internal wall of a hole, the second sheet, in particular made of mineral glass, comprises 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) and the light source is coupled to the wall of the second sheet delimiting the hole, preferably housed in the hole. The light source, in particular the 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 passenger compartment. Examples of embodiments described in patents WO2018 / 178591 or WO2013 / 110885 may be cited in particular.

[0187] Alternatively, in the second configuration j), the light source, preferably a set of light-emitting diodes, is optically coupled with the third sheet by all or part of the third edge called the injection edge, possibly with a notch housing the source or preferably the injection edge (longitudinal or lateral) set back by at least 10 mm and at most 200 mm from the second edge, thus leaving a so-called protruding area of ​​the second sheet, the light source being under or even fixed to the protruding area.

[0188] In the case of light injection by offsetting the (each) light source to the passenger compartment side (side F4 or even side F6 in configuration j)), preferably the or each light redirection element (preferably prismatic), peripheral, is:

[0189] -reflector and third face side F3 in particular prismatic, comprising reflector prisms in particular oriented towards the third face F3 or towards the second face F2 -or transparent fourth main face side F4 in particular comprising a macroprism or transparent prisms, preferably prism(s) oriented towards the passenger compartment, .

[0190] The (each) light source is then opposite or offset from the fourth main face F4 (or F6 in configuration j)) in particular direct optical coupling or via an optic, in particular light source and light redirection element offset by a window clear, facing an internal masking layer.

[0191] An optical element (collimation etc.) can be placed between the (each) light source and the fourth face F4 (or F6 in configuration j), in particular an optical element fixed to the fourth face F4 (or F6 in configuration j). The light source can be fixed to the fourth face F4 (or F6 in configuration j). The main direction of radiation from the light source (before or after collimation) can be adjusted.

[0192] In particular, the glazed roof comprises, in the first configuration i) (respectively configuration j)), a light source, preferably a set of light-emitting diodes, on the fourth face F4 side (respectively on the face F6 side), and a light redirection element (local, peripheral), which is preferably a reflective prismatic element, on the third face F3 side (respectively on the face F5 side), comprising reflective prisms in particular oriented towards the third face F3 or towards the second face F2 (respectively oriented towards the face F5 or towards the face F6) or which is preferably a transparent prismatic element on the fourth main face F4 side (respectively on the face F6). The redirected light propagates between the fourth face F4 and the optical isolating coating.

[0193] The light redirection element on the third face F3 (in the first configuration i)) is in particular in contact with the lamination interlayer, in particular the reflective prismatic polymer film.

[0194] Preferably, in order not to generate stray light escaping towards the second face F2 and diffusing (the internal edge of) the light redirection element, peripheral, in particular prismatic, and even prismatic reflective or transparent polymer film, is:

[0195] - at least partially opposite the optical isolating coating

[0196] - or at most 4mm, preferably at most 1mm, from the optical isolating coating.

[0197] Preferably (in the first configuration i)), the reflective light redirecting element, in particular reflective prismatic element, is preferably above at most 30 pm of the coated face or in the plane of the coated face or closer to the third face F3.

[0198] The base or the top of the prisms of the prismatic reflective element, in particular prismatic reflective film, is preferably above at most 30 pm of the coated face or in the plane of the coated face or closer to the third face F3. The reflective light redirection element may comprise a prismatic (textured) film (with a smooth (non-textured, non-functional) main surface and an opposite textured, functional surface), flexible and therefore curved to adapt to the curvature of the laminated glazing. In particular: - a partially structured transparent polymer film forming (micro)prisms - and with a reflective coating (metallic, silver, aluminum) forming a conformal deposit - or a transparent (planar) polymer film, forming a substrate, with on a main surface a transparent (polymer) layer with an arrangement of (micro)prisms and with a reflective coating forming a conformal deposit -.

[0199] The (micro)prisms (reflectors) are oriented towards the third face F3 or towards the second face F2 (in the first configuration i)). The reflective coating is thus oriented towards the third face F3 or towards the second face F2.

[0200] The reflective light redirection element (comprising a textured film, in particular a polymeric, prismatic film, or a substrate film, in particular a polymeric, and a textured, prismatic layer, as well as a reflective coating) can be bonded to the third face F3 directly or via at least one adhesive or held by suction (strong interaction), in particular by the pressure of the assembly (in the first configuration i)). The reflective light redirection element is for example placed on the third face and after suction of the air, there is a suction effect.

[0201] The prisms may be at least 1 pm high and preferably at most 100 or 50 pm or 30 pm.

[0202] The film, in particular prismatic polymer or substrate of the microprisms (prismatic layer, organic for example) can be less than 200pm, 100pm, 80pm or 50pm and even at least 30pm. If the film is oriented (the reflecting prisms) towards the third face F3, the substrate film can be tinted and even opaque or opacified. For example, it is a PET carrier of the reflecting microprisms, tinted and even opaque black.

[0203] Preferably the prismatic film has a total thickness of at most 500pm or even 400pm or 200pm or 100pm.

[0204] In particular, the light redirection element is a reflective prismatic element, comprising reflective prisms, arranged on the third main face side F3, is:

[0205] - on the third face F3, in particular in contact with the lower interlayer or a frame interlayer (clear) - in particular if the interlayer is the size of the coated substrate

[0206] - in the lamination interlayer, particularly based on PVB:

[0207] - embedded in the lower interlayer, in particular based on PVB (with or without plasticizers) or in a frame interlayer (clear) on the periphery of the coated film, in particular based on PVB (with or without plasticizers)

[0208] - on the lower interlayer, between the lower interlayer, in particular based on PVB (with or without plasticizers), and the upper interlayer (preferably with plasticizers) clear or tinted or a frame interlayer on the periphery of the coated film clear, tinted and even opaque, in particular based on PVB (with or without plasticizers)

[0209] - on the front face Fa, in particular in contact with the upper interlayer or an additional interlayer, or rear Fb, in particular in contact with the lower interlayer, the reflecting prisms being on the second face side F2 or on the third face side F3.

[0210] Preferably, the prismatic redirecting element (in particular comprising a polymer film and prisms) 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 still at least 1 cm and in particular of a length similar to that of the light source, linear (custom-made). It can be a rectangular strip with rounded corners for example.

[0211] Microprisms (with reflective coating) act in particular as reflective prisms and reflect the light that hits them in a direction that depends on the angle of inclination of the prism surfaces and the angle of incidence of the light.

[0212] For example, a prismatic film comprises a transparent thermoplastic film (polymer), for example based on polyethylene terephthalate (PET), on which the transparent prisms are formed from a polyacrylate (resin crosslinked for example by UV). A partially textured layer is preferred. For the reflective prismatic film, a metallic layer (conformal deposition) is added, for example silver or aluminum.

[0213] The transparent prismatic film preferably has a light transmission of at least 70%, more preferably at least 80%, very preferably at least 90%.

[0214] Microprisms, for example, have a triangular section. Prisms, for example, are joined.

[0215] For example, the total thickness of the reflective prismatic film is at most 500 pm (in particular at least 30 or 50 pm) and even at most the thickness of the lower interlayer and / or the coated film (substrate).

[0216] The (each) light source on the fourth face can be associated with a collimating optic. The light source with a possible collimator can be fixed on the fourth face, by direct gluing or by being spaced and on a peripheral support fixed on the fourth face.

[0217] The interlayer frame, in particular opaque, can cover the light redirection element (reflective prismatic film).

[0218] The possible inner peripheral masking layer (on face F4) may include a spacing so as not to block the optical coupling, in particular to allow the rays from the light source to pass towards the light redirection element, in particular a prismatic element and even a reflector. This redirecting film (transparent) is for example of a longitudinal shape, in particular rounded in the corners, for example the length of the window clear. This redirecting film may have a thickness of at most 0.5 mm or 0.4 mm and in particular at least 50 pm, 100 pm.

[0219] The (each) light source and the or each light redirection element, in particular a prismatic element and even a reflector, may be offset by a window clear, facing an internal masking layer. The redirection element (redirector film, in particular a prismatic film) and / or the light source is, for example, at most 100 mm from the window clear and / or preferably at least 10 or 20 mm.

[0220] The edge of the light redirection element, in particular the prismatic element and even the reflector, may be at least 10 mm apart from the edge of the first sheet (or the third sheet) and even at least one of the following values: 15 mm, 20 mm, 25 mm, 30 mm.

[0221] The internal masking layer is not necessarily opaque enough to prevent stray light from being seen, the light source on the fourth side F4. We may want an opaque internal element, peripheral and between the second and third sides, in particular between this internal masking layer (delimiting the clear glass) and the third side or even replacing this internal masking layer.

[0222] 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 (in particular prismatic element and even reflector, optical redirector film) opposite the light source.

[0223] An internal opaque element of the same or similar color as the internal opaque masking layer (if any), particularly black, is preferred.

[0224] This internal opaque element, preferably black, and preferably under the black internal masking layer, is chosen from:

[0225] - a part within the interlayer (black, with black coating, metal part, polymer etc.)

[0226] - in particular a film, in particular a polymer (non-adhesive) film inserted within the interlayer, in particular a tinted film ((thermoplastic) film opaque in mass or with an opaque layer, for example, placed or glued on the peripheral part of the transparent film

[0227] - in particular an opaque layer, for example on the peripheral part of the transparent film (of the coated substrate)

[0228] - or interlayer, in particular thermoplastic such as PVB (zone - outside the clear glass - of the lower or additional interlayer or frame or upper layer locally opaque or all around).

[0229] The internal opaque element may extend upstream of the injection zone (from the external edge of the light direction element, in particular the prismatic element and even the reflector) to the edge or at least 1 cm or 5 mm from the edge of the glazing. 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.

[0230] An example of opaque PVB with black pigments is the product called RB17830000 Vaneeva absolute black® sold by Saflex.

[0231] The roof may incorporate one or more functional (non-adhesive) elements above the coated substrate, in particular:

[0232] - electronic device (more or less extensive) chosen from at least one of the following devices: sensors; electrically controllable device with variable tint and / or diffusion, additional diodes (emitting towards the first or second sheet), in particular local or extending over almost the entire glazing, in particular opposite or offset from the propagation zone, light extraction means, between the second face and the optical isolating coating.

[0233] - functional polymer film, for example infrared reflective film (solar control, silver stacking, replacing a layer on the F2 side), and / or heating for example polymer substrate with an electroconductive (transparent) coating, in particular with a thickness of at most 0.4 or 0.2 mm, in particular local or preferably extending over almost the entire glazing (and over the entire clear glass), with the electroconductive coating on the F2 side or the F3 side.

[0234] In particular for a functional element (polymer film, electronic device, etc.) with a thickness of at least 0.2 mm, a peripheral intermediate sheet made of the same type of material as the two sheets, in particular based on PVB (or thermo-crosslinked adhesive, for example, pressure-sensitive), surrounds and touches the edge of the functional element and is between these two sheets, protruding and in contact with them. This peripheral intermediate sheet is part of the lamination interlayer. For a functional element with a thickness less than or equal to 0.2 mm, the thermoplastic material can flow sufficiently.

[0235] Preferably for any functional element (film in particular polymer) according to the invention, a thickness of at least 30 or 40 pm or 50 pm is preferred for easy handling during assembly and preferably at most 400 pm or 300 pm.

[0236] In particular, a functional element (polymer film, electronic device) with a thickness of at most 0.2 mm does not require a peripheral intermediate layer.

[0237] For the functional polymer film, it is possible to use, for example, a clear PET film coated with an electrically conductive layer, for example XIR from Eastman, or a coextruded PET-PMMA film, for example of the 3M® SRF type.

[0238] Also, the roof may comprise between the upper interlayer and the lower interlayer, above said optical isolating coating, at least one of the following functional elements:

[0239] - an electrically controllable device, in particular with variable diffusion (based on liquid crystals) or variable tint (based on electrochromic) comprising an electroactive layer (liquid crystals in a polymer matrix or electrochromic layer) between a front electroconductive support on the second face F2 and a rear electroconductive support on the third face F3,

[0240] - a photovoltaic device; with one or more photovoltaic cells connected (in one or more lines)

[0241] - or a functional film and preferably, in particular in first configuration i), the lamination interlayer comprises an additional interlayer, the coated substrate being sandwiched between the additional interlayer and the lower interlayer and the functional element between the upper interlayer and the additional interlayer.

[0242] The additional layer (called “short”) can be the same size as the functional element.

[0243] An interlayer frame, particularly based on PVB (with or without plasticizers), single or multi-layer (sheets), clear or tinted and even opaque in mass or with opaque ink, can be used for:

[0244] - the functional element

[0245] - the functional element and the additional (“short”) layer

[0246] - the functional element, the additional (“short”) layer and the coated substrate (in particular at least 200 pm)

[0247] - the functional element, the additional (“short”) layer, the coated substrate and the (short) lamination interlayer of the same size as the coated substrate.

[0248] Examples of electro-optical functional elements are SPD functional elements (SPD = Suspended Particle Device), known for example from EP0876608B1 and WO2011033313A1, and PDLC functional elements (PDLC = Polymer Dispersed Liquid Crystal), known for example from DE102008026339A1. There are also electrochromic functional elements, known for example from EP3702572A1 or EP2917159A1.

[0249] Typically, the two electrodes are arranged between two carrier films, usually made of PET. Commercially available multi-layer films are also coated on both sides with a protective film made of polypropylene or polyethylene, which serves to protect the carrier films from dirt or scratches.

[0250] In a particularly preferred embodiment, the functional element is a PDLC (polymer dispersed liquid crystal) functional element. The PDLC functional element contains liquid crystals that are embedded in a polymer matrix. If no voltage is applied to the PDLC functional element, the liquid crystals are aligned in disorder, which leads to strong scattering of the light passing through the active layer (translucency). If a voltage is applied to the functional element, the liquid crystals align in a common direction and the transmission of light through the functional element is increased (transparency). However, it is also possible for the liquid crystals to be ordered in a

[0251] The unstressed state and the liquid crystals are accordingly disordered when a voltage is applied. However, other functional elements can also be used whose variability of optical properties is based on liquid crystals, such as PNLC (polymer networked liquid crystal) functional elements. If, in relation to the functional element as a PDLC functional element, one speaks of the application of a voltage, then an alternating voltage (the effective value of the alternating voltage and not the instantaneous voltage) is intended for the purposes of the invention.

[0252] For example, the blur in the diffusing state of the roof with a PDLC layer is at least 80% and better 85%, 90%, 95%.

[0253] In another preferred embodiment, the functional element is an SPD (suspended particle device) element. The SPD element contains suspended particles. The suspended particles change the optical state of the functional element by absorbing light by applying a voltage. SPD functional elements therefore have switching states with transparent and opaque optical properties as well as intermediate steps between transparency and opacity. If, in relation to the functional element as an SPD element, one speaks of the application of a voltage, then an alternating voltage (the effective value of the alternating voltage and not the instantaneous voltage) is intended for the purposes of the invention.

[0254] In another preferred embodiment, the functional element is an electrochromic functional element. In this case, the transmission of visible light through the functional element depends on the degree of placement of the ions. The ions are released, for example, by an ion storage layer and stored in an electrochromic layer. The transmission can be influenced by the voltage applied to the functional element, which causes migration of the ions. Suitable electrochromic layers preferably contain at least tungsten oxide or vanadium oxide. If the functional element is an electrochromic functional element, the control unit is preferably not equipped with an inverter and a direct voltage is applied to the functional element. A DC / DC converter to achieve voltages between 1 V and 50 V and preferably from 10 V to 42 V, but may be part of the control unit as required.

[0255] The edge of the functional element (PDLC, EC, solar, functional film) can be distant from the edge of the first sheet (or the third sheet) by at least 10mm and even by at least one of the following values: 15mm, 20mm, 25mm, 30mm.

[0256] The edge of the functional element and that of the coated substrate can be aligned or separated by at most 10cm or 5cm or 1cm.

[0257] 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 lamination interlayer (upper interlayer) for example an opaque coating (PVB-based and with a coloring agent) on a main face of a PVB on the second or third face.

[0258] The internal masking layer can be 2mm or 3mm (less than 5mm) from the edge of the glazing or even up to the edge. The masking layer can be a strip framing the glazing (windshield, roof, etc.), particularly black. The entire periphery is opaque to hide bodywork elements or joints or to protect an adhesive for mounting on the vehicle. This internal masking layer in particular is in contact with the second main face. This internal masking layer delimits in particular the glass clear. It may be advantageous for the external edge of the optical insulating coating or more broadly any adhesive layer of the lamination interlayer to be masked by the internal masking layer, not to be in the glass clear. It may be advantageous for the external and even internal edges of the frame layer or to be masked by the internal masking layer, not to be in the glass clear, for the frame layer to be under the internal masking layer.

[0259] The width of the internal masking layer along the sides of a motor vehicle roof is usually less than that at the front or even the rear.

[0260] In particular, another masking layer, called the inner layer, may be on the fourth face, called F4, on the passenger compartment side, in particular facing the internal masking layer (and even of an identical nature, for example, an enamel, in particular black, on a second sheet of mineral glass). It may be adjacent to a possible transparent functional coating, in particular athermal, at least in the clear of the window.

[0261] Especially for a car roof (first sheet is the exterior glazing):

[0262] - the width of the internal (and even interior) masking layer along the longitudinal edges can be at most 30cm, in particular 10-20cm.

[0263] - the width of the internal (and even interior) masking layer along the rear side edge may be at most 40cm or 30cm, in particular at least 1 or 5cm, and along the front side edge at most 60cm or 40cm, in particular at least 1 or 5cm.

[0264] The width of the inner masking layer is preferably greater than that of the inner masking layer. The inner masking layer is in particular congruent or of lesser width than the width of the inner masking layer.

[0265] The internal and / or inner masking layer may be an organic or mineral binder (fused glass frit) with an organic or inorganic coloring agent, in particular a molecular dye or inorganic pigment.

[0266] The internal and / or inner masking layer is preferably a continuous layer (solid with a solid edge or alternatively a gradient edge (set of patterns).

[0267] Thus, the laminated glass roof can include at least one of the following functional elements:

[0268] - an internal, peripheral, opaque masking layer, between the second face F2 and the third face F3 and, and even covering the perimeter of the optical isolating coating and even of the coated substrate, in particular in contact with the second main face F2, defining a window clear

[0269] - an inner, peripheral, opaque masking layer on the fourth main face F4 or face F6, in particular congruent or of a width less than the width of the inner masking layer,

[0270] - an internal, peripheral opaque element which is between the second face F2 and the third face F3 (and even between an internal masking layer and the third face F3), in particular for masking a light source and a light redirection element

[0271] - an internal electrically conductive coating, in particular reflecting infrared (solar control), such as a silver layer(s) stack, on the F2 side on the first, clear sheet, or on an additional film, in particular a polymer film

[0272] - an external electrically conductive coating, in particular reflecting infrared rays (low emissivity), such as a transparent conductive oxide layer stack (TCO in English, in particular based on indium tin oxide (ITO)), on face F4 of the second mineral glass sheet in the first configuration i), or face F6 of the second mineral glass sheet in the second configuration )).

[0273] The laminated glazing according to the invention may also comprise an infrared-reflecting or absorbing layer, on face F2 or on a transparent polymer film (PET etc.) between two interlayers, in particular a stack of thin layers comprising at least one metal layer such as silver (and even 2 or 3 or 4), the or each silver layer being arranged between dielectric layers on face F2 or on ITO for face F4 or F6. Mention may be made, as stacks with ITO for face F4 or F6, of those described in patent LIS2015 / 0146286, on face F4, in particular in examples 1 to 3.

[0274] An infrared-reflecting coating is also known in patent application WO2018 / 206236 and in particular:

[0275] - a dielectric coating comprising dielectric layers such as layers of silicon nitride and / or silicon oxide,

[0276] - a functional layer based on a transparent conductive oxide (TCO) such as a layer based on indium tin oxide (ITO),

[0277] - a dielectric coating comprising dielectric layers such as silicon nitride and silicon oxide layers.

[0278] The first and second sheets (and possibly third sheets) may be of substantially identical shape and size, for example generally rectangular or quadrilateral shape (longitudinal edges not parallel), possibly rounded corners,

[0279] The first sheet may have a larger size than the second sheet, thus exceeding this second sheet on at least one part (one side or several adjacent or opposite sides) of its periphery, thus possibly a second sheet (passenger compartment side) smaller with a recessed edge in particular of at most 10 or 5 cm from the edge of the first sheet of glass, on one edge or several edges (longitudinal and / or lateral) in particular or on the entire periphery, in particular useful when the second sheet is optically coupled by its peripheral edge to a light source.

[0280] Alternatively or even cumulatively, the second sheet may have a larger size than the third sheet, thus exceeding this third sheet on at least one part (one side or several adjacent or opposite sides) of its periphery, thus possibly a smaller third sheet (passenger compartment side) with a recessed edge in particular of at most 10 or 5 cm from the edge of the second sheet of glass, on one edge or several edges (longitudinal and / or lateral) in particular or on the entire periphery, in particular useful when the third sheet is optically coupled by its peripheral edge to a light source.

[0281] The thickness of the layer(s) between the second face F2 and the third face F3 (respectively between F4 and F5) is preferably at most 1.1 mm or 0.9 mm and in particular the thickness of the lamination interlayer (respectively other lamination interlayer) is at most 1.1 mm or 0.9 mm, at least in the guide zone.

[0282] The thickness between the first face F1 and the fourth face F4 (where applicable between F1 and F6) is preferably at most 9mm or 7mm, particularly for a road vehicle.

[0283] The first mineral glass sheet may be based on silica, soda-lime, preferably silicosodo-lime, or even aluminosilicate, or even borosilicate, and preferably has a weight content of total iron oxide (expressed in the form Fe2O3) of at least 0.4% and preferably at most 1.5%.

[0284] To limit absorption, the second mineral glass sheet may in particular be based on silica, soda-lime, silico-sodo-lime, or aluminosilicate, or borosilicate, and have a weight content of total iron oxide (expressed in the form Fe2O3) of at most 0.05% (500 ppm), preferably at most 0.03% (300 ppm) and at most 0.015% (150 ppm) and in particular greater than or equal to 0.005%. The redox of the second glass sheet is preferably greater than or equal to 0.15.

[0285] The second sheet may be made of a polymer, in particular based on polyurethane (PU) typically with n1 of approximately 1.47, polycarbonate (PC) typically with n1 of approximately 1.59, poly(methyl methacrylate) (PMMA) typically with n1 of approximately 1.47, poly(vinyl chloride) (PVC) with n1 of approximately 1.54.

[0286] The second sheet can be flexible to follow the curvature of the first curved sheet or even preformed.

[0287] The first sheet of glass, and even the second and / or third selected sheet of glass, can be produced by the "float" process, which allows a perfectly flat and smooth sheet to be obtained, or by drawing or rolling processes.

[0288] Examples of glass include float glass of classic soda-lime composition, possibly hardened or tempered thermally or chemically, an aluminum or sodium borosilicate or any other composition.

[0289] In this text, the 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°).

[0290] The laminated glass roof according to the invention may include one of the following sequences (strict or open):

[0291] - first glass sheet (tinted or clear with electrically conductive coating, reflecting infrared (IR) etc. on F2 side) / upper thermoplastic interlayer (PVB, TPU or EVA) / functional element (variable tint or diffusion, functional film, photovoltaic) / additional interlayer (PVB, TPU, EVA) / coated substrate / lower interlayer (clear) thermoplastic (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second glass sheet (extra clear)

[0292] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic interlayer (PVB, TPU or EVA) / functional element (variable tint or diffusion, functional film, photovoltaic) / additional interlayer (PVB, TPU, EVA) / / coated substrate / lower interlayer (clear) thermoplastic (preferably TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second polymer sheet (PMMA, PC).

[0293] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic lamination interlayer (PVB, TPU or EVA) / functional element (variable tint or diffusion, functional film, photovoltaic) / additional interlayer (PVB, TPU, EVA) / / coated substrate / lower interlayer (clear) thermoplastic (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second glass sheet / other lamination interlayer / third glass or polymer sheet

[0294] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / functional element (variable tint or diffusion, functional film, photovoltaic) / lower interlayer (PVB, TPU, EVA) / second glass or polymer sheet (PMMA, PC) / other upper thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / coated substrate / other lower (clear) thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / third glass sheet (extra clear).

[0295] For example, preferably: - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 face) / upper thermoplastic PVB interlayer (clear or tinted) functional element (variable tint or diffusion, functional film, photovoltaic) / additional interlayer (PVB) / coated substrate / lower interlayer (clear) thermoplastic PVB or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second glass sheet (extra clear)

[0296] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic PVB interlayer functional element (variable tint or diffusion, functional film, photovoltaic) / additional interlayer (PVB) / coated substrate / lower thermoplastic interlayer (preferably TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second polymer sheet (PMMA, PC).

[0297] - first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic PVB interlayer or adhesive crosslinked polymer material (EVA,) / functional element (variable tint or diffusion, functional film, photovoltaic) / lower interlayer (PVB, TPU, EVA) / second glass sheet / other upper thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / coated substrate / other lower thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / third glass sheet (extra clear).

[0298] The invention also relates to a motor vehicle incorporating the illuminated laminated glass roof defined above, in particular a fixed roof (canopy or canopy in English).

[0299] For the roof of a motor vehicle, for example, a light transmission of at most 40% or even at most 28% and even at most 8% in the clear window is chosen and preferably at least 3% or at most 1% in the tinted state with a variable tint device.

[0300] In this application, road vehicle means a car, in particular a utility vehicle (van, minivan, courier) of less than 3.5 tonnes (light utility vehicle) or a truck or a shuttle, a small public or private transport vehicle.

[0301] The window clear is thus a central area.

[0302] This clear glass generally represents at least 20%, preferably at least 50% and in particular at least 70% or 80% or 90% or 95% of the total surface area of ​​the glazing, including areas covered by encapsulation or seals. In other words, the internal opaque masking layer covers an area which generally represents at most 80%, preferably at most 50% and in particular at most 30% or 20 or 10% or 5% of the total surface area of ​​the glazing. The optical density of the opaque layer is preferably at least 2 and even up to 5.

[0303] The lamination interlayer can occupy at least 70%, 80%, 90%, 95% or even 100% of the glazing surface. The second face F2 can be the tin face or the opposite face or the first face F1 can be the tin face.

[0304] The third face F3 can be the tin face or the fourth face F4 can be the tin face. The fifth face F5 can be the tin face or the sixth face F6 can be the tin face.

[0305] Other details and advantageous characteristics of the invention will appear on reading the examples according to the invention illustrated by the following figures.

[0306] Figure 1 represents a schematic sectional view of an illuminable laminated glass roof 100 of a motor vehicle according to the invention in a first embodiment. Figure 1a represents a detailed view of the reflective prismatic film used to redirect the light. Figure 1' represents a schematic front view of the roof of Figure 1. Figure 1" represents a schematic front view of a variant of the roof 100.

[0307] Figure 2 represents a schematic sectional view of an illuminable laminated glass roof 200 of a motor vehicle according to the invention in a second embodiment.

[0308] Figure 3 represents a schematic sectional view of an illuminable laminated glass roof 300 of a motor vehicle according to the invention in a third embodiment. Figure 3a represents a detailed view of the reflective prismatic film then used to redirect the light. Figure 4 represents a schematic sectional view of an illuminable laminated glass roof 400 of a motor vehicle according to the invention in a fourth embodiment. Figure 4a represents a detailed view of the reflective prismatic film then used to redirect the light. Figure 5 represents a schematic sectional view of an illuminable laminated glass roof 500 of a motor vehicle according to the invention in a fifth embodiment.

[0309] Figure 6 represents a schematic sectional view of an illuminable laminated glass roof 600 of a motor vehicle according to the invention in a sixth embodiment.

[0310] Figure 7 represents a schematic sectional view of an illuminable laminated glass roof 700 of a motor vehicle according to the invention in a seventh embodiment. Figure 7' represents a schematic front view of the glazing of Figure 7.

[0311] Figure 8 represents a schematic sectional view of an illuminable laminated glass roof 800 of a motor vehicle according to the invention in an eighth embodiment.

[0312] Figure 8' represents a schematic sectional view of an illuminable laminated glass roof 800' of a motor vehicle according to the invention in a variant of the eighth embodiment.

[0313] Figure 9 represents a schematic sectional view of an illuminable laminated glass roof 900 of a motor vehicle according to the invention in a ninth embodiment.

[0314] Figure 10 represents a schematic sectional view of an illuminable laminated glass roof 1000 of a motor vehicle according to the invention in a tenth embodiment.

[0315] Figure 10' represents a schematic sectional view of an illuminable laminated glass roof 1001 of a motor vehicle according to the invention in an embodiment with a third sheet. Figure 10” represents a schematic sectional view of an illuminable laminated glass roof 1002 of a motor vehicle according to the invention in an embodiment with a third sheet. Figure 11 represents a schematic sectional view of an illuminable laminated glass roof 1100 of a motor vehicle according to the invention in an eleventh embodiment. Figure 1T represents a schematic sectional view of the electrically controllable variable diffusion device inserted in the roof of Figure 11.

[0316] Figure 12 represents a schematic sectional view of an illuminable laminated glass roof 1200 of a motor vehicle according to the invention in a twelfth embodiment.

[0317] Figure 13 represents a schematic sectional view of an illuminable laminated glass roof 1300 of a motor vehicle according to the invention in a thirteenth embodiment.

[0318] Figure 14 represents a schematic sectional view of an illuminable laminated glass roof 1400 of a motor vehicle according to the invention in a fourteenth embodiment.

[0319] Figure 15 represents a schematic sectional view of an illuminable laminated glass roof 1500 of a motor vehicle according to the invention in a fifteenth embodiment.

[0320] Figure 16 represents a schematic sectional view of an illuminable laminated glass roof 1600 of a motor vehicle according to the invention in a sixteenth embodiment.

[0321] Figure 17 represents a schematic sectional view of an illuminable laminated glass roof 1700 of a motor vehicle according to the invention in a seventeenth embodiment.

[0322] Figure 18 represents a schematic sectional view of an illuminable laminated glass roof 1800 of a motor vehicle according to the invention in an eighteenth embodiment.

[0323] Figure 19 represents a schematic sectional view of an illuminated laminated glass roof 1900 of a motor vehicle according to the invention in a nineteenth embodiment.

[0324] Please note that for the sake of clarity, the various elements of the objects represented are not necessarily reproduced to scale.

[0325] Figure 1 represents a schematic sectional view here side of a luminous laminated vehicle roof 100 according to the invention in a first embodiment by peripheral lighting. Figure T represents a schematic front view of the roof of Figure 1. In particular, for a fixed roof (canopy) the width is from 85cm to 1.4m and the length from 75cm to 1.65m.

[0326] This is a laminated car roof, 100, rectangular and curved (in one or more directions), which includes:

[0327] - a first sheet of glass 1, for example rectangular (of dimensions 1600X1100 mm for example), with a tinted composition (VENUS VG10 or TSA 4+ glass marketed by the company Saint-Gobain Glass with light transmission or TL of approximately 28%), for example with a thickness equal to 2.1 mm, with a first main face 11 corresponding to face F1, a second main face 12 called face F2 and an edge (longitudinal slices 10 and 10'), face F2 being optionally coated with a transparent functional coating (heating etc.) or even face F1,

[0328] - a second transparent sheet, preferably mineral glass, 2, here of the same shape and dimensions as the first sheet 1, forming 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 sodium-calcium silicic glass, extra-clear such as Diamant glass marketed by the company Saint-Gobain Glass of TL of at least 91%, of thickness equal for example to 2.9 mm, glass of refractive index n1 of the order of 1.52 at 600 nm or Optiwhite glass of 1.95 mm, or Sunmax glass of 2.05 mm.

[0329] - between the face F2 and the face F3, a lamination interlayer 3, transparent, with a longitudinal edge 30 here aligned or possibly offset from the longitudinal edges 10, 10' towards the center of the glass (therefore set back), here comprising:

[0330] - an upper interlayer 31, in particular thermoplastic, here based on PVB (with plasticizers, at least 30% by weight), of 0.38mm or 0.76mm (in one or two sheets) in adhesive contact with the face F2, clear or alternatively tinted, for example gray tinted with TL at 27%

[0331] - a lower interlayer 32 of PVB (with plasticizers, at least 30% by weight), 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 the F3 face, with a refractive index n3 of approximately 1.48 at 600nm, for example PVB of TL at 99.9%.

[0332] Alternatively, the lower interlayer 32 is based on PVB with little or no plasticizers (in particular less than 5% by weight), in particular MOWITAL film, for example with a thickness of at most 100 pm.

[0333] Alternatively, the lower interlayer 32 is based on crosslinked polymer adhesive material, in particular adhesive polyacrylate film or adhesive silicone film, in particular of at least 30 pm, or it is an adhesive coating (polyacrylate, etc.) obtained by deposition on the third face F3 or on the coated substrate or deposited between the third face F3 and the coated substrate (by filling).

[0334] The laminated glass roof 100 comprises an internal masking layer 7 forming a masking frame delimiting a window clear 70 (daylight) here rectangular (see figure T) with straight edges. Any local modification of the edges 70 is possible (gradient of points, wider zone etc.). For example the internal masking layer 7 is:

[0335] -black enamel on the F2 side

[0336] - or a black ink, on one of the faces of the upper interlayer, preferably the face facing face F2, ink preferably based on PVB with black pigments if upper interlayer 31 PVB.

[0337] -the masking width at the front (front side edge 10a) is for example 10 to 40cm -the masking width at the back (rear side edge 10b) is for example 5 to 25cm -the masking width on the long sides (longitudinal edges) is for example 5 to 20cm, identical or different width for the two long sides.

[0338] To optically isolate a lower part (with light guide and light extraction) and the tinted, absorbent upper part, the laminated glazed roof 100 further comprises an optical isolating coating 5 on one of the front faces Fa 51' (face side F2), or alternatively or rear Fb 52' (face side F3) as here, then called the coated (or deposited) face of a transparent film 5', preferably polymer and distinct from a fluoropolymer. The assembly is referred to as a coated substrate. The coated substrate is sandwiched between the upper interlayer 31 and the lower interlayer 33, extends throughout the clear glass and beyond, its edge 50, 50' being under the masking layer 7.

[0339] The coated substrate is set back from the edges 10, 10', 20, 20' of the sheets 1, 2 in particular by at least 10mm. The transparent film and even the coated substrate is here of thickness less than 200pm or even at most 100pm and is protected at the periphery by one or both of the lower and upper interlayers 31, 32 (in particular creep during lamination). If the upper interlayer is clear, the interface between the two lower and upper interlayers 31, 32 may be indistinguishable.

[0340] The optical isolating coating 5 is made of material, preferably polymer, comprising a separate matrix of a fluoropolymer of submillimeter thickness Ei, of at least 400nm and better 500nm or 800nm, and a slice 50 possibly set back from the slice of the film 50' without harming the optical isolation function. The optical isolating coating can be directly or on a functional sub-layer (barrier etc.), transparent on the film 5'.

[0341] The 5' film is transparent but can be tinted.

[0342] The optical isolator coating 5 is transparent and even as transparent as possible.

[0343] In one configuration, the optical isolating coating comprises a crosslinked polymer matrix with said index n2, preferably at most 1.42 and even at least 1.35, matrix preferably among polymers based on polyacrylate with fluorinated function, in particular urethane acrylate or fluoro urethane acrylate or fluoro-silicone acrylate. The thickness is preferably at most 10 pm or 5 pm or 2 pm and at least 800 nm.

[0344] In one configuration, the optical isolator coating comprises a matrix with a refractive index n2 m greater than n2 and less than n1, and preferably with n2 mof at most 1.48 (and n2 preferably of at most 1.42 and even at least 1.35), and comprising (nano)porosities and / or low index and / or porous, hollow (nano)particles, with a refractive index of less than n1, in particular hollow, of a size of at most 300nm or even 100nm, for example hollow silica nanoparticles. The thickness is preferably at most 10pm or 5pm and at least 800nm. The matrix is ​​a crosslinked or thermoplastic polymer, in particular chosen from polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, PVB or mineral, in particular silica. The polymer matrix based on polyacrylate, polyurethane or even polyepoxides, polyvinyl acetate, polyester is preferred.

[0345] Alternatively, the 5' film is an ultra-thin glass and / or the 5 coating is porous silica.

[0346] In order to avoid folds, undulations, preferably the coated substrate may be in an area of ​​the roof having a curvature, a sphericity limited in particular by a radius of curvature of at least 1.5 m. For example, the edge 50 may be sufficiently far from the edge of the sheets 1, 2. The masking width on the sides and / or front and rear may be adjusted (increased) for this purpose.

[0347] For example, 5' transparent film is a clear PET of less than 200pm, especially 100pm or 75pm, with a TL of around 90% or more.

[0348] For the light function, the laminated glass roof 100 further comprises, masked from the outside by the internal masking layer 7:

[0349] - light-emitting diodes 4 (here with front emission) on a support 40 (for example PCB) opposite (or offset from) the fourth main face 14,

[0350] - on the third main face F3, a light redirection element, local, peripheral like a prismatic reflector film 8.

[0351] For example, the reflective prismatic film is a polymeric prismatic film 8, as shown in detail in Figure 1a with:

[0352] - a flat part 81 (substrate for example PET of at most 100 pm) glued or fixed by suction to the third face F3 13,

[0353] - and a textured layer (by embossing etc.), partially or even entirely textured, forming prisms 82 which have become reflectors by a reflective layer 83, for example metallic (by conformal deposition on the prismatic textured surface).

[0354] Here the prismatic reflective film 8 is glued with a 60 glue on the third main face F3, it can also be held by suction.

[0355] The microprisms are schematically cross-sectioned as right triangles, but the apex angle can be adjusted to better redirect the light towards the extraction means. Similarly, the main emission direction of the light source can be adjusted. A collimator can be added between the F4 face and the diodes.

[0356] For example, the reflective prismatic film comprises a transparent thermoplastic film, for example based on polyethylene terephthalate (PET), on which transparent prisms are formed from a polyacrylate (resin crosslinked for example by UV). and a metallic layer (conformal deposition) makes it possible to form the reflective prisms.

[0357] In another example, a transparent prismatic film (then on the fourth face) comprises a transparent thermoplastic film, for example based on polyethylene terephthalate (PET), on which the transparent prisms are formed from a polyacrylate (resin crosslinked for example by UV). Alternatively, a macroprism is used on the F4 face.

[0358] The reflective prismatic film 8 is in adhesive contact here with the lower interlayer 32. The film forms a longitudinal strip like the linear type light source 4 along a longitudinal edge of the roof for example as seen in figure T.

[0359] Alternatively, the prismatic film 81, 82 is a monolithic polymer film, for example preformed, and the reflective layer 83 is applied.

[0360] The light from the diodes is refracted in the second glass, in the prismatic reflective film 8 then redirected at a given angle towards the light extraction means 6 here on the third face F3, for example diffusing ink and as transparent as possible if desired, and in the clear glass. The light rays propagate by total internal reflection at the level of the face F4, and:

[0361] -for some by total internal reflection at the interface of the lower lamination interlayer 32 and the second sheet up to the extraction means (via the face side surface F3)

[0362] - and even for others at the interface of the interlayer of lamination 32 and optical isolating coating 5 and reach the diffusing means via the surface on the face side F2).

[0363] The reflective prismatic film 8 is here under the optical isolator coating 5, under the coated substrate. As a precaution to avoid stray light passing through the film and even the masking layer 7, an internal opaque element 7' is optionally added to the right of the prismatic film 8 (of the same width and not exceeding the internal edge 80' of the film 8), here an opaque ink (black) on the front face 51' of the film 5' or even a black PET film glued or placed on it. Alternatively, a macroprism or a transparent prismatic film is chosen on the F4 side, downstream of the diodes.

[0364] The diodes and / or their support can be secured to the F4 face (by an additional part etc.). Alternatively, the diodes are side-emitting.

[0365] We can therefore double the means by adding another light source 4' on its support 40', another prismatic reflector film 8' along the other longitudinal edge 10' as seen in figure 1”. The longitudinal edges 10, 10' here are not parallel. In particular, we can have on each side a set of diode strips on supports 40 which are separate or connected to each other. We can also place them on the front or rear edges.

[0366] The extraction means 6 are for example here extended or punctual geometric patterns, in particular with a width of at most 10 mm to avoid the phenomenon of shading.

[0367] For example, the distance between the extraction means 6 and the diodes (or the prismatic film 8) is at least 10mm or 40mm.

[0368] For example, the extraction means comprise a diffusing coating (network of disjointed and / or interconnected patterns) in contact with the face F3 and covering at most 40% of the clear glass to promote adhesion with the second sheet 2. The diffusing coating is deposited on the face F3 (for example a semi-transparent enamel) or on the main face of the lower PVB layer 32 facing the face F3. The diffusing coating 6 is polymeric or mineral and is deposited by liquid means (by ink jet, screen printing, etc.).

[0369] For example, the diffusing coating is on the F3 (or even F4) face, for example with an acrylate matrix, preferably with a refractive index greater than or equal to n1, with TiO2 particles of at least 100nm in diameter and preferably at most 1 pm or 400nm. It has a thickness of 10pm to 100pm or even 50pm. The diffusing coating (for example based on PVB with TiO2 particles of 100 to 200nm in diameter) is alternately deposited on the face of the PVB facing the F3 face.

[0370] Alternatively, the diffusing coating (for example based on PVB with TiO2 particles of 100 to 200 nm in diameter) is deposited on the face of the PVB 32 facing the F2 face, and is then in contact with the optical isolating coating (or in contact with the rear face if the optical isolating coating is moved to the front face). For example, the diffusing coating (network of disjoint and / or interconnected patterns) in contact with the optical isolating coating (or the rear face if the optical isolating coating is moved to the front face) covers at most 50% of the clear glass to promote adhesion of the optical isolating coating (or the rear face if the optical isolating coating is moved to the front face) with the lower interlayer.

[0371] The luminous glazing 100 may have a plurality of extraction zones 6, in particular of given geometry (rectangular, square, round, etc.). Alternatively to the diffusing layer 6 (enamel, ink, screen printed or inkjet printed, etc.), it may be a film, local, placed or glued locally on the third face F3 or even the fourth face F4 (prismatic film or with diffusing or mass-diffusing layer) or between the PVB 32 and the film 5'.

[0372] Alternatively, the light source may be one or more primary sources (diodes etc.) coupled directly to a guide, along the coupling edge, for example an extractor optical fiber with a light exit zone.

[0373] You can choose diodes emitting white or colored light for ambient lighting, reading lighting, etc.

[0374] It is possible to provide several series of 4 diodes (one edge, two edges, three edges, on the entire periphery) controlled independently and even of different colors.

[0375] For the manufacture of the roof we can:

[0376] - stack the different elements 31, 5' with 5, 32 on the second sheet of glass 2 then proceed with the lamination

[0377] -or stack the different elements 32, 5' with 5, 31 on the first glass sheet 1 then proceed with the lamination. Figure 2 represents a schematic sectional view of an illuminable laminated glass roof 200 of a motor vehicle according to the invention in a second embodiment.

[0378] This 200 roof differs from the previous 100 roof in that:

[0379] - adding another 4' light source on a 40' support and another 8' prismatic reflector film on an opposite edge (or alternatively adjacent) and adding an internal opaque element

[0380] - the internal opaque elements 7' are on the back side 52' of the film 5', on the optical isolating coating 5 (or locally removed), for example black ink or black PET glued or placed

[0381] - the upper interlayer 31 is tinted, for example, gray

[0382] - an IR 17 reflective coating on the F4 side, forming a low emissivity layer.

[0383] Furthermore, a transparent protective layer 53, in particular polymeric, with a refractive index greater than n2, of submillimetric thickness and even at most 100 pm or even 30 pm, is on and covers the optical insulating coating 5 in particular for mechanical protection purposes if the optical insulating coating comprises (nano) porosities and / or low-index (nano) particles, in particular hollow and / or porous. This transparent protective layer is here a protective coating 53, deposited on the optical insulating coating 5. It can be the same matrix as the optical insulating coating 5 without the (nano) porosities and / or low-index (nano) particles.

[0384] Optionally, the diffusing coating 6, for example a set of patterns of identical width, is not on the F3 or F4 side but is printed on the face of the PVB 32 on the F2 side and therefore in local contact with this protective transparent layer 53.

[0385] Alternatively, the film 5' is an ultra-thin glass (UTG) and / or the optical isolating coating 5 is porous silica and the protective coating 53 is dense silica, for example coatings 5, 53 obtained by sol-gel method.

[0386] The transparent, single-layer or multi-layer infrared-reflecting coating 17 comprises at least one electrically conductive functional layer, for example of transparent conductive oxide, in particular ITO. The infrared-reflecting coating preferably comprises a dielectric sub-layer, in particular silicon (oxy)nitride, and preferably comprises a dielectric over-layer, in particular silicon (oxy)nitride.

[0387] Figure 3 represents a schematic sectional view of an illuminable laminated glass roof 300 of a motor vehicle according to the invention in a third embodiment. Figure 3a represents a detailed view of the reflective prismatic film then used to redirect the light. This roof 300 differs from the first roof 100 in that:

[0388] - the outer glass 1 is clear, in particular a 2.1mm Planiclear glass with an IR-reflecting coating (silver stack, forming solar control) 18, the whole having a TL of 71.8% (91% without the coating 18), the upper interlayer 31 is tinted or possibly the upper interlayer 31 is clear but a source of light diffusion

[0389] - the prismatic film 8 has been moved (detail view in figure 3a) on the rear face 51 and turned over, the reflective prisms (the reflective coating) are oriented towards the face F3

[0390] - possibly if necessary an internal masking layer 71 is on the face F4 14 without hindering the injection of the light source 4 (width possibly locally reduced)

[0391] - possibly the diffusing coating 6 is here on the face F4 14, for example an enamel or is alternatively on the PVB 32 and / or on the face F3 or face side Fb.

[0392] With such a flipped film configuration, the substrate 80 and / or the prisms 82 and or the glue 60 (on the coating 5 or on the bare face Fb) which is possible and even opaque and then the element 7' can be more optional. The flipped film (with opaque part preferably) can be adjacent to the coated substrate (inner edge 80' close to the edge 50'). The flipped film and light source can be split (as in figure 2).

[0393] Figure 4 represents a schematic sectional view of an illuminable laminated glass roof 400 of a motor vehicle according to the invention in a fourth embodiment. Figure 4a represents a detailed view of the reflective prismatic film then used to redirect the light. This roof 400 differs from the first roof 100 in that:

[0394] - the optical isolating coating 5 is on the front face 51', then the transparent film (PET etc) 5' is chosen clear,

[0395] - the internal opaque element 7' is on the rear face 52' of the film 5', on the optical insulating coating 5 (or locally removed) in the form of a black glue 60 used to fix the prismatic film 8 (detail view in figure 4a) thus fixed to the coated substrate, still under the internal masking layer 7, outside the clear glass 70.

[0396] Figure 5 represents a schematic sectional view of an illuminable laminated glass roof 500 of a motor vehicle according to the invention in a fifth embodiment.

[0397] This 500 roof differs from the first 100 roof in that:

[0398] - the upper interlayer 31 is for example tinted, in particular gray (glass 1 is tinted or clear and even with a layer 18)

[0399] - the optical isolating coating 5 is on the front face 5T, then the film 5' (polymer, PET) is chosen clear, and even protected by a protective layer 53 (for example similar to that described in figure 2)

[0400] - the reflective prismatic film 8 is between the upper interlayer 31 and the lower interlayer 32, in particular in adhesive contact with these layers (but a glue can be added, for example black, on the face side F2).

[0401] The internal opaque element 7' is omitted, in particular the gray PVB 31 may be sufficient.

[0402] The light source and the reflector prismatic film 4', 40, 8' have been split. The inner edge 80' of each reflector prismatic film 8, 8' is at most 4 mm apart, preferably at most 1 mm from the outer edge (of the 50' edge) of the optical isolating coating and is even in contact with the 50' edge of the 5' film.

[0403] Optionally, the diffusing coating 6, for example a set of patterns of identical width, is not on the face F3 or face F4 side but is printed on the face of the PVB 32 on the face F2 side and therefore in local contact with the rear face 52'.

[0404] Figure 6 represents a schematic sectional view of an illuminable laminated glass roof 600 of a motor vehicle according to the invention in a sixth embodiment.

[0405] This 600 roof differs from the previous 500 roof in that:

[0406] - the outer glass 1 is clear, in particular a 2.1mm Planiclear glass with an IR reflective coating (silver stack) 18, the whole having a TL of 71.8% (91% without the coating 18)

[0407] - the reflective prismatic film 8 is in adhesive contact with the upper interlayer 31 (but a glue can be added, for example black, on the face F3 side), on the front face 5T of the coated substrate

[0408] - the protective layer is omitted here, for example the optical isolating coating 5 is a low index polymer, for example crosslinked

[0409] - a low emissivity 17 coating is on the F4 side.

[0410] The light source and the reflecting prismatic film can be split.

[0411] Figure 7 represents a schematic sectional view of an illuminated laminated glass roof 700 of a motor vehicle according to the invention in a seventh embodiment. Figure 7' represents a schematic front view of the roof 700.

[0412] This roof 700 differs from the first roof 100 in that the film 5' is 200 pm or more and to compensate for this high thickness an interlayer frame layer 34 is added, made of PVB, here clear. The internal edge 80' of the prismatic film 8 is aligned with the edge 50 of the coated substrate, and even of the optical isolating coating 5. The internal opaque element 7' is between the interlayer frame layer in PVB 34 and the lower interlayer 32 always at the right of the prismatic film 8. It can be a black PET or even a black ink on PVB 34 or 32.

[0413] Figure 8 represents a schematic sectional view of an illuminable laminated glass roof 800 of a motor vehicle according to the invention in an eighth embodiment.

[0414] This 800 roof differs from the previous 700 roof in that:

[0415] - added light source and 4', 40' prismatic film.

[0416] - the optical insulating coating 5 is on the front face 5T, then the film 5' is chosen clear, - the lower interlayer 32 is of the same size as the film 5', for example a PVB sheet (interface possibly indistinguishable with the frame layer 34) or is a coating of PSA pressure-sensitive optical glue or a PSA pressure-sensitive film for example polyacrylate of at least 30pm.

[0417] The frame layer 34 is therefore thicker and comes into contact with the third face F3

[0418] Alternatively, the film 5' is sufficiently thin, for example less than 200 pm, and the frame layer 34 is removed and the film 5' is protected by creep of the upper interlayer 31.

[0419] Alternatively, one can have a reversed film as already described or on the F4 side a transparent macroprism or a transparent prismatic film (multiprisms).

[0420] Figure 8' represents a schematic sectional view of an illuminable laminated glass roof 800' of a motor vehicle according to the invention in a variant of the eighth embodiment.

[0421] This 800' roof differs from the previous 800 roof in that:

[0422] - the optical isolating coating 5 is on the back face 52', the PET 5' is clear or tinted,

[0423] - possibly the light source and prismatic film 4, 4', 40, 40' were moved further to the edge, under the frame layer 34

[0424] - the opaque element 7' is moved accordingly

[0425] - a low emissivity layer 17 is opposite F4

[0426] Alternatively, the 5' film is sufficiently thin, for example less than 200 pm, the frame layer 34 is removed and the 5' film is protected by creep of the upper interlayer 31.

[0427] Figure 9 represents a schematic sectional view of an illuminable laminated glass roof 900 of a motor vehicle according to the invention in a ninth embodiment.

[0428] This 900 roof differs from the seventh 700 roof in that:

[0429] - the PVB 34 interlayer frame layer here is opaque (black) with a TL of at most 5% or even 0%, forming an internal opaque element

[0430] - possibly the prismatic reflective film 8 is moved here embedded in the lower interlayer 31,

[0431] - possibly the outer glass 1 is clear, in particular a 2.1mm Planiclear glass with an IR-reflecting coating (silver stack) 18, the whole having a TL of 71.8% (91% without the coating 18), for example the layer 31 is tinted.

[0432] Optionally, the diffusing coating 6, for example a set of patterns of identical width, is not on the F3 or F4 side but is printed on the face of the PVB 32 on the F2 side and therefore in local contact with the optical isolating coating 5.

[0433] Figure 10 represents a schematic sectional view of an illuminable laminated glass roof 1000 of a motor vehicle according to the invention in a tenth embodiment. This roof 1000 differs from the first roof 100 in that the injection of light is through the edge 20 of the second sheet (the reflective prismatic film and the internal opaque element are removed).

[0434] Preferably the second sheet 2 is set back from the first sheet 1 to accommodate the light source 4 here for example with side emission.

[0435] Diodes 4 extend along the longitudinal coupling edge 20 of the second glass sheet 2. The PCB support 40 is fixed for example by glue (or double-sided adhesive) on the edge 20.

[0436] Alternatively, the source 4 is housed in a hole in the second sheet 2.

[0437] Figure 10' represents a schematic sectional view of an illuminable laminated glass roof 1001 of a motor vehicle according to the invention in an embodiment with a third sheet, illustrating the second configuration j).

[0438] This roof 1001 differs from the first roof 100 in that it comprises a third sheet 2', made of mineral glass or polymer sheet (PC, PM MA), with a fifth main face F5 15, a sixth main face F6 16 and a third slice 20', with a refractive index n'1 preferably of at least 1.48 and at most 1.6, in particular from 1.5 to 1.53, third sheet bonded with the second sheet via another lamination interlayer 3', 31', 32' comprising another upper interlayer 3T and another lower interlayer 32' in contact with the fifth face F5 and with a refractive index n'3 in the visible.

[0439] The coated substrate 5', 5 is then moved to be between the other upper and lower interlayers 31', 32' of said other lamination interlayer, for example made of PVB or TPU or crosslinked material, in particular crosslinked EVA. n2 is then less than n'1, the difference in refractive indices n'1-n2 being at least 0.06 in the visible.

[0440] The light injection is through the longitudinal (or lateral as a variant) 2T edge of the third sheet (the reflecting prismatic film and the internal opaque element are removed) which is set back from the second sheet 2' for example by at least 1cm to accommodate diodes (here with top or front emission) 4 plus support 40.

[0441] A 4' light source has been added to its 40' support on the opposite longitudinal edge and the third sheet is then preferably also set back from the second sheet.

[0442] Alternatively, each source 4 is housed in a hole in the third sheet.

[0443] Figure 10” represents a schematic sectional view of an illuminated laminated glass roof 1002 of a motor vehicle according to the invention in an embodiment with a third sheet. This roof 1002 differs from the previous roof 1001 in that:

[0444] - the 4' diodes are side-emitting - the outer glass 1 is clear, notably a 2.1mm Planiclear glass with an IR-reflecting coating (silver stack) 18, the whole having a TL of 71.8% (91% without the coating 18)

[0445] - the upper interlayer 31 is tinted, gray, in particular gray PVB

[0446] - the optical isolating coating 5 is on the front face 5T, then the film 5' is chosen clear, and even protected by a protective layer 53 (for example similar to that described in figure 2)

[0447] - an IR 17 reflective coating is on the sixth face F6 16.

[0448] - the film being at least 200pm, we preferably add a 34' intercalary frame layer between 3T and 32' layers

[0449] Alternatively, each source 4 is housed in a hole in the third sheet.

[0450] Figure 11 represents a schematic sectional view of an illuminable laminated glass roof 1100 of a motor vehicle according to the invention in an eleventh embodiment. Figure 1T represents a schematic sectional view of the electrically controllable variable diffusion device inserted in the roof 1100.

[0451] This roof 1100 differs from the first roof 100 in that it comprises between the upper intermediate layer 31 and an additional intermediate layer 33, an electrically controllable device, here with variable diffusion 9, preferably tinted, gray, in particular PVB.

[0452] The thickness of the device being 0.4 mm, an interlayer frame 35 with a thickness of 0.38 mm is added, made of PVB, clear or tinted. The edges of the device 9 are under the internal masking layer 7.

[0453] For example, the blur in the diffusing state of the roof with the device is at least 80%.

[0454] The coated substrate 5', 5 is then in adhesive contact with the additional interlayer 33 and the lower interlayer 32.

[0455] The outer glass 1 is clear, namely a 2.1 mm Planiclear glass with an IR reflective coating (silver stack) 18, the whole having a TL 71.8% (91% without the coating 18).

[0456] Preferably an IR 17 reflective coating is on the F4 side.

[0457] As shown in Figure 1T, the variable diffusion device 9 comprises:

[0458] - a first support 91 (PET of 125 pm for example) with a first electroconductive coating 92 (for example ITO) on the second side F2

[0459] - an electroactive layer 93, which is based on liquid crystals in a polymer matrix (PDLC in English),

[0460] - a second 9T support (PET of 125pm for example) with a second electroconductive coating (for example ITO) 92' on the third face F3. The electroconductive coatings 92, 92' on the periphery are not covered by the electroactive layer 93 and current supply strips 90 for the power supply are placed thereon. In particular, the supports 91, 9T protrude on two opposite sides.

[0461] For the purpose of protecting the layer 93, a chemical protection means 94 (barrier to possible plasticizers in the PVB) can be provided, for example by glued or contacting PET polymer strips.

[0462] Alternatively, the device is replaced by an electrochromic device or even a functional PET film (tinted, etc.).

[0463] Of course, we can use all the location and arrangement configurations for the reflective or transparent prismatic film or for a macroprism in F4 face already described in the previous figures, in particular the (each) reflective prismatic film returned (under the coated or adjacent substrate).

[0464] Figure 12 represents a schematic sectional view of an illuminable laminated glass roof 1200 of a motor vehicle according to the invention in a twelfth embodiment.

[0465] This 1200 roof differs from the previous 1100 roof in that:

[0466] - the outer glass 1 is tinted, the upper interlayer 31 is possibly clear

[0467] - the optical isolating coating 5 is on the front face 5T, then the film 5' is chosen clear, and even protected by a protective layer 53 (for example similar to that described in figure 2)

[0468] - we add a light source 4' on its support 40 and another prismatic reflective film 8' The prismatic reflective films are glued on the coated substrate as in figure 3.

[0469] Preferably an IR 17 reflective coating is on the F4 side.

[0470] Optionally, the diffusing coating 6, for example a set of patterns of identical width, is not on the face F3 or face F4 side but is printed on the face of the PVB 32 on the face F2 side and therefore in local contact with the rear face 52'.

[0471] Alternatively, the device 9 is replaced by an electrochromic device or a tinted functional PET film or with an electroconductive coating, in particular for solar control).

[0472] Alternatively, the additional layer 33 is the size of the device 9 and the coated substrate 5, 5', so an interposed frame layer is added.

[0473] Only one interlayer frame layer can be used depending on its thickness from the top interlayer to the F3 face.

[0474] Figure 13 represents a schematic sectional view of an illuminable laminated glass roof 1300 of a motor vehicle according to the invention in a thirteenth embodiment.

[0475] This 1300 roof differs from the eleventh 1100 roof in that:

[0476] - the optical isolating coating 5 is on the front face 5T, then the film 5' is chosen clear, the prismatic film is on the front face 5T, in adhesive contact with the additional layer

[0477] 33.

[0478] Figure 14 represents a schematic sectional view of an illuminable laminated glass roof 1400 of a motor vehicle according to the invention in a fourteenth embodiment.

[0479] This roof 1400 differs from the eleventh roof 1100 in that the light injection is through the edge 20 of the second sheet (the reflective prismatic film and the internal opaque element are removed). Preferably, as a variant, the second sheet 2 is set back from the first sheet 1 to accommodate the light source 4 here, for example, with side emission.

[0480] Diodes 4 extend along the longitudinal coupling edge 20 of the second glass sheet 2. The PCB support 40 is fixed for example by glue (or double-sided adhesive) on the edge 20.

[0481] Alternatively, the source 4 is housed in a hole in the second sheet 2.

[0482] Figure 15 represents a schematic sectional view of an illuminable laminated glass roof 1500 of a motor vehicle according to the invention in a fifteenth embodiment.

[0483] This 1500 roof differs from the eleventh 1100 roof in that:

[0484] - the frame layer 34 is opaque, black forming an opaque internal element

[0485] - the optical isolating coating 5 is protected by a protective layer 53

[0486] - the internal edge 80' of the prismatic film 8 (on the face F3) is under the edge 50' of the film 5'.

[0487] Figure 16 represents a schematic sectional view of an illuminable laminated glass roof 1600 of a motor vehicle according to the invention in a sixteenth embodiment.

[0488] This 1600 roof differs from the eleventh 1100 roof in that:

[0489] - the optical isolating coating 5 is on the front face 51', in contact with the additional layer 33

[0490] - film 5 is thick, an interlayer frame layer 34 is added, clear, tinted or even opaque

[0491] - we add a 4' light source and an 8' prismatic reflective film on the opposite edge

[0492] The reflective prismatic films are between the lower interlayer 32 and the frame layer 34.

[0493] 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.

[0494] Optionally, if necessary, an inner masking layer 71 is on the face F6 16 without hindering the injection of the light source 4 (width possibly locally reduced). Figure 17 represents a schematic sectional view of an illuminable laminated glass roof 1700 of a motor vehicle according to the invention in a seventeenth embodiment.

[0495] This roof 1700 differs from the eleventh roof 1100 in that it comprises a third sheet 2', made of mineral glass or polymer sheet (PC, PM MA), with a fifth main face F5 15, a sixth main face F6 16 and a third slice 20', with a refractive index n'1 preferably of at least 1.48 and at most 1.6, in particular from 1.5 to 1.53, third sheet bonded with the second sheet via another lamination interlayer 3', 31', 32' comprising another upper interlayer 3T and another lower interlayer 32' in contact with the fifth face F5 and with a refractive index n'3 in the visible.

[0496] The coated substrate 5', 5 is then moved to be between the other upper and lower interlayers 31', 32' of said other lamination interlayer, for example made of PVB or TPU or crosslinked material, in particular crosslinked EVA. n2 is then less than n'1, the difference in refractive indices n'1-n2 being at least 0.06 in the visible.

[0497] The light injection is through the longitudinal (or lateral as a variant) 2T edge of the third sheet (the reflecting prismatic film and the internal opaque element are removed) which is set back from the second sheet 2' for example by at least 1cm to accommodate diodes (here with top or front emission) 4 plus support 40.

[0498] The optical isolating coating 5 is on the front face 5T, in contact with the additional layer 33.

[0499] Alternatively, source 4 is housed in a hole in the third sheet.

[0500] The extraction means 6 are opposite F6.

[0501] Figure 18 represents a schematic sectional view of an illuminable laminated glass roof 1800 of a motor vehicle according to the invention in an eighteenth embodiment.

[0502] This 1800 roof differs from the previous 1700 roof in that

[0503] - a light source 4' is added to its support 40' coupled to the opposite longitudinal edge 21 and the third sheet 2' is then preferably also set back from the second sheet 2

[0504] - preferably an IR 17 reflective coating is on the F6 side

[0505] - extraction means 6 are opposite F5.

[0506] Figure 19 represents a schematic sectional view of an illuminated laminated glass roof 1900 of a motor vehicle according to the invention in a nineteenth embodiment.

[0507] This 1900 roof differs from the eleventh 1100 roof in that the device is replaced by a 9' photovoltaic device with one or more solar cells.

[0508] Preferably the upper interlayer 31 is clear, for example PVB, and the outer glass 1 is clear. Of course, all the location and arrangement configurations for the reflective or transparent prismatic film or for a macroprism in face F4 already described in the previous figures can be used, in particular the (each) reflective prismatic film turned over (under the coated or adjacent substrate).

Claims

CLAIMS 1. Illuminated laminated glass roof for vehicles, particularly road vehicles (100 to 1900) comprising: - laminated glazing, preferably curved, transparent comprising: - a first sheet (1), transparent, made of mineral glass, with a first main face F1 (11), a second opposite main face F2 (12) and a first slice (10), intended to form the outer glass, - a polymer lamination interlayer (3, 31, 32, 33, 34, 35) comprising an upper interlayer layer (31), in adhesive contact with the second face F2 or with a functional transparent coating on the face F2, - a second sheet (2), transparent, made of mineral or polymer glass, with a third main face F3 (13), an opposite fourth main face F4 (14) and a second edge (20), and the roof comprising an optical isolator layer (5), transparent, with a refractive index n2 in the visible, optical isolator layer of submillimetric thickness Ei and of at least 400nm, characterized in that it comprises a coated substrate which comprises: - a transparent film (5'), made of material, preferably polymer, distinct from a fluoropolymer, with a main front face Fa (5T) oriented towards the face F2 and an opposite main rear face Fb (52'), of submillimetric thickness Ef, - the optical isolator layer which is an optical isolator coating (5), made of material comprising a separate matrix of a fluoropolymer, on one of the front faces Fa or rear faces Fb, called the coated face, and a wafer (50), and in that: - in a first configuration i) the first sheet (1) and / or the upper interlayer (31) being tinted, the second sheet has a refractive index n1, the coated substrate is laminated between the second and third faces F2 and F3, and is between the upper interlayer and a lower interlayer (32) with a refractive index n3 in the visible, in adhesive contact with the third face F3 or with a functional transparent coating on the face F3, n2 is less than n1, the difference in refractive indices n1-n2 being at least 0.06 in the visible - or in a second configuration j) the roof comprises a third sheet (2'), made of mineral glass or polymer sheet, with a fifth main face F5 (15), a sixth main face F6 (16) and a third slice (20'), with a refractive index n'1 preferably of at least 1.48 and at most 1.6, in particular from 1.5 to 1.53, third sheet bonded with the second sheet via another lamination interlayer (31', 32') comprising another upper interlayer layer (3T) and another lower interlayer layer (32') in contact with the fifth face F5 and refractive index n'3 in the visible, the coated substrate (5', 5) is between the other upper and lower interlayers (31', 32') of said other lamination interlayer, at least one element being tinted among the first sheet, interlayer of the lamination interlayer (31), the second sheet (2), the other upper interlayer (31') n2 is less than n'1, the difference in refractive indices n'1-n2 being at least 0.06 in the visible.

2. Illuminatable laminated glass roof for a vehicle (100 to 1900) according to the preceding claim, characterized in that the difference in refractive indices n1-n2 or n'1-n2 is at least 0.08 in the visible range and in that the thickness Ei is at least 500nm, and even at least 800nm.

3. Illuminated laminated glass roof of a vehicle (100) according to one of the preceding claims, characterized in that the optical insulating coating (5) is on the rear face Fb (52').

4. Illuminated laminated glass roof for a vehicle according to one of claims 1 or 2, characterized in that the optical insulating coating (5) is on the front face Fa (5T) and the transparent film (5') is preferably clear.

5. Illuminated laminated glass roof for a vehicle according to one of the preceding claims, characterized in that the lamination interlayer (3) or the other lamination interlayer (31', 32') is in adhesive contact with the coated substrate on the coated face side and on the face side opposite the coated face, and in that possibly a functional coating (6), in particular diffusing, local or discontinuous, is on the lower thermoplastic interlayer, in particular based on PVB, or the other lower thermoplastic interlayer, in particular based on PVB, is in contact with the rear face or with the optical insulating coating.

6. Illuminatable laminated glass roof for a vehicle according to one of the preceding claims, characterized in that the optical insulating coating (5) comprises a crosslinked polymer matrix with said index n2, preferably at most 1.42, matrix preferably among polymers based on polyacrylate with fluorinated function, in particular urethane acrylate or fluoro urethane acrylate or fluoro-silicone acrylate.

7. Illuminated laminated glass roof for a vehicle according to one of claims 1 to 6, characterized in that the optical insulating coating comprises a matrix with a refractive index n2 m greater than n2 and less than n1 or n'1, and preferably with n2 m of at most 1.48 and n2 preferably of at most 1.42, and comprising (nano)porosities and / or (nano)particles of low index, of refractive index lower than n1 or n'1, in particular hollow, of size of at most 300nm.

8. Illuminated laminated glass roof for a vehicle according to the preceding claim, characterized in that the matrix is ​​organic, in particular a crosslinked or thermoplastic polymer, in particular chosen from polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, PVB, or in that the matrix is ​​mineral, in particular silica.

9. Illuminated laminated glass roof for a vehicle according to one of the preceding claims, characterized in that it comprises a transparent protective layer (53), with a refractive index greater than n2, of submillimetric thickness and even at most 100 pm, covering the optical insulating coating, transparent protective layer: - in contact with the lower interlayer or the other lower interlayer and even with a diffusing functional coating (6) forming light extraction means, - or in contact with the upper interlayer or the other upper interlayer, the optical isolating coating being on the front face (5T).

10. Illuminated laminated glass roof for a vehicle according to one of the preceding claims, characterized in that the transparent film (5') is set back from the first or second slice by at least 10 mm, and in particular the thickness Ef of the transparent film (5) is at least 0.2 mm and the roof comprises an interlayer frame (34), framing the periphery of the coated substrate and in particular between the faces F2 and F3 in the first configuration i) or between the faces F5 and F6 in the second configuration j).

11. Illuminatable laminated glass roof for a vehicle according to one of the preceding claims, characterized in that the transparent film (5') is a polymer, thermoplastic or crosslinked 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 30 pm and preferably less than 200 pm.

12. Illuminated laminated glass roof for a vehicle according to one of the preceding claims, characterized in that it comprises a light source (4) optically coupled with a light guide arranged under the optical insulating coating, further from the second face F2 than the optical insulating coating, and preferably light extraction means (6), light guided in the light guide, which are preferably on the third face side F3 in the first configuration i) or on the fifth face side F5 in the second configuration j).

13. Illuminatable laminated glass roof for a vehicle according to one of the preceding claims, characterized in that it comprises, under the optical insulating coating, further from the face F2 than the optical insulating coating, light extraction means (6), comprising a diffusing coating, preferably transparent, with a binder and diffusing particles, preferably a binder with a refractive index n5 greater than or equal to n1 or n3 or to n'1 and n'3, in particular at least 1.48: - in first configuration i) the lower interlayer or the second sheet is the substrate of the diffusing coating, in particular possibly in contact with the optical isolating coating on the Fb face - in second configuration j) the other lower interlayer or the third sheet is the substrate of the diffusing coating, thus on the face F5 or F6, or rear face side Fb, in particular possibly in contact with the optical isolating coating on the face Fb.

14. Illuminated laminated glass roof for a vehicle according to the preceding claim, characterized in that the binder of the diffusing coating is organic, in particular a crosslinked polymer, chosen from polymers based on polyacrylate, polyepoxides, polyvinyl acetate, polyester and polyurethane.

15. Illuminated laminated glass roof for a vehicle according to the preceding claim, characterized in that the binder of the diffusing coating is a polyacrylate polymer, and the binder of the optical isolating coating is a polyacrylate polymer, in particular polyacrylate with a fluorinated function and / or with low index nanoparticles or nanoporosities.

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

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

18. Illuminated laminated glass roof for a vehicle according to one of claims 16 or 17, characterized in that the light redirection element is a reflective prismatic element, comprising reflective prisms in particular oriented towards the third face F3 or towards the second face F2, arranged on the side of the third main face F3, is: - on the third face F3, in particular in contact with the lower interlayer or a frame interlayer - in the lamination interlayer, particularly based on PVB: - embedded in the lower interlayer (31), in particular based on PVB, or in a frame interlayer on the periphery of the coated film, in particular based on PVB, - on the lower interlayer, between the lower interlayer (32), in particular based on PVB, and the upper interlayer (31) clear or tinted or a frame interlayer on the periphery of the coated film clear, tinted and even opaque, in particular based on PVB - on the front face Fa, or back Fb.

19. Illuminatable laminated glass roof for a vehicle according to one of the preceding claims, characterized in that it comprises between the upper interlayer (31) and the lower interlayer (32), above said optical insulating coating, an electrically controllable device, in particular with variable diffusion or tint, comprising an electroactive layer between a front electrically conductive support on the second face side F2 and a rear electrically conductive support on the third face side F3, or a photovoltaic device and preferably in that the lamination interlayer comprises an additional interlayer (33), the coated substrate (5', 5) being sandwiched between the additional interlayer (33) and the lower interlayer (32).

20. Illuminated laminated glass roof for a vehicle according to 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 isolating coating and even of the coated substrate, in particular in contact with the second face F2, defining a window clear - an inner, peripheral, opaque masking layer on the fourth face F4 or the sixth face F6, in particular congruent or of a width less 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, in particular transparent prismatic film or reflector, -an internal electroconductive coating (18), in particular reflecting infrared rays such as a silver layer(s) stack, on the second face F2 on the first, clear sheet, or on an additional film, in particular a polymer film - an external electrically conductive coating (17), in particular reflecting infrared rays, such as a transparent conductive oxide layer stack, on the fourth face F4 of the second mineral glass sheet in first configuration i), or sixth face F6 of the second mineral glass sheet in second configuration j).

21. Vehicle, in particular a road vehicle, incorporating an illuminated laminated glass roof according to one of the preceding claims.

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