WO2024170442A1

WO2024170442A1 - Illuminable laminated sunroof for a vehicle, vehicle having such an illuminable laminated sunroof

Info

Publication number: WO2024170442A1
Application number: PCT/EP2024/053349
Authority: WO
Inventors: Mathieu Berard; Aurélie LEGRAND; Bernard Nghiem; Ljiljana DURDEVIC; Laurent Maillaud; Christy Valerie DE MEYER; Florence JACQUES
Original assignee: Saint-Gobain Glass France
Priority date: 2023-02-17
Filing date: 2024-02-09
Publication date: 2024-08-22
Also published as: FR3145919A1

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), and light extraction means (6) on said same film (5').

Description

DESCRIPTION

TITLE: ILLUMINABLE LAMINATED GLASS ROOF OF VEHICLE, VEHICLE WITH SUCH ILLUMINABLE LAMINATED GLASS ROOF

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.

Light emitting diodes have been used for automotive glass roofs, including panoramic laminated roofs with LED lighting as described in WO2010049638. 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.

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 600 nm, with a refractive index n2 to 550 nm, 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.

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

For this purpose, 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 railway vehicle (trains, metros, trams), comprising laminated glazing (preferably curved) - transparent (at least in one pane of glass (central)) - comprising:

- a first sheet (curved), transparent, made 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 main face F2 opposite bare or coated with a transparent functional coating (in the clear of the window) and a first slice, in particular 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 with a thickness of at least 0.7 mm, for example with a refractive index nv of at least 1.5 in the visible

- a polymer lamination interlayer, transparent (at least in the clear (central) glass) - 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 F2 face in the clear glass, in particular transparent functional coating with a thickness of at most 1 m or 200 nm,

- a second sheet (curved), 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.

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 glass (central), of submillimeter thickness Ei and of at least 400nm.

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

- 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 submillimeter thickness Ef, (and a slice),

- 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 face (or deposition) and a slice,

- light extraction means, preferably diffusing coating or even added diffusing film - in particular further from the second face F2 than the optical isolating coating (preferably full layer) in particular light extraction means (diffusing coating) on the optical isolating coating (Fb side) or even light extraction means (diffusing coating) adjacent (contiguous), to the optical isolating coating then discontinuous (in the clear of the window) on the face fb, in particular diffusing coating on the face Fb.

In a first configuration i), preferably the first sheet and/or the upper interlayer being tinted (in particular in the clear of the 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 in other words clear) with an index of refraction 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 of the window), 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 still 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, third sheet 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.

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 F4 face), preferably in the second sheet (via an internal wall of a hole (through) in the second sheet or with injection by the edge or via the fourth F4 face light refracted in the second sheet, as detailed later) and/or the lower lamination interlayer or in the third possible sheet or even under the third sheet (in particular via the F6 face, light refracted in the third sheet). The third sheet can be locally textured or diffusing and even thick enough to promote injection into the latter, the guidance, for example a polymer sheet (polymethacrylate PMMA etc.). The roof can 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 sheet of glass (in particular by the edge or via the fourth face F4) or to an optical guide, for example an extractor optical fiber with light exit zone along a coupling edge of the roof (of the second sheet).

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 slice, 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 to 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 interlayer of lamination, the second sheet, the other upper intercalary layer. 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 light injection 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)

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 sheet of glass (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).

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

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 isolating coating, for example for a deposit obtained by liquid means in particular a nanoporous silica sol gel (optical isolating coating) or even MgF2.

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 isolating 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.

When the extraction means are a diffusing coating (in particular polymer, printed ink) 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 the coated substrate than on glass.

Advantageously, to further increase the luminance:

-the difference in refractive indices n1-n2 or n'1-n2 is at least 0.08 in the visible and better still 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, -the thickness Ei is at least 800nm, 900nm, 1 μm and preferably less than or equal to one of the following values: 10pm, 5pm, 3pm, 2pm.

For mechanical resistance (in particular if low index nanoparticles and/or porosities in the optical isolator 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 0.1, 0.11, 0.12. In particular for n1 or n'1 from 1.5 to 1.53 (with second or third glass sheet).

The coated substrate (and possibly lower interlayer, second sheet or even another lower interlayer, third sheet) has a blur of at most 1°, or even 0.5° (excluding areas with light extraction means). Inclusions and pinholes are best avoided.

In particular with n1 from 1.5 to 1.53 in the visible (standard glass sheet), in particular at 600nm and preferably from 500nm to 750nm and even from 380nm to 750nm, n2 and/or the average index n2 _m may be less than or equal to one of the following values: -1.42, 1.41, 1.40, 1.39, 1.38, 1.37, 1.36, 1.35, 1.34, 1.33, 1.32, 1.31, 1.30, 1.29, 1.28, 1.27, 1.26, 1.25, 1.2, 1.19, 1.18, 1 ,16, 1 ,17, 1 ,15.

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 can also be less than or equal to one of the following values: 1.50, 1.49, 1.48, 1.47.

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).

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

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

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 cost without degrading the optical function.

The optical isolating coating is transparent (to see the sky) but can be tinted or clear, in particular having (alone) a light transmission of at least 80% or at least 90%. The optical isolating 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. 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 glass and all or part of the coated face Fa or Fb depending on the extent of the film under the masking frame.

The optical isolating coating is simply a single layer but can be manufactured in one or more passes (by liquid method).

The optical isolating coating may 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 100 pm and at least 30 pm or a coating for example of at most 10 pm. An optical isolating coating may 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. Preferably, in particular to simplify manufacturing, on the transparent film, preferably a thermoplastic or crosslinked polymer, the optical isolating coating may be organic, crosslinked polymer or thermoplastic, and the protective overlayer organic, for example a thermoplastic or crosslinked polymer.

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. The light extraction means, in particular diffusing coating, are preferably on the optical isolating coating, in direct contact or with an intercalated layer, rather than adjacent, contiguous, to the discontinuous optical isolating coating.

In a second embodiment, the optical isolating coating is on the front face Fa of the film, in particular polymer and even PET, and preferably the light extraction means, in particular diffusing coating, on the rear face. The carrier film is preferably 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.

The transparent film according to the invention, preferably polymeric, just like the optical insulating coating, 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).

The lamination interlayer or the other lamination interlayer is in adhesive contact with the coated substrate on the coated face side and on the face side opposite the coated face, adhesive contact with the light extraction means, in particular diffusing coating and/or contact with the optical isolating coating

For example, the diffusing coating occupies at most 50% or 40% of the roof, or of the window clear.

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 from 1.51 to 1.53), clear optical insulating coating or possibly tinted with coloring agent (molecular or pigment).

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

The optical isolating coating is preferably deposited by liquid means.

The surface of the optical isolating 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 chosen deposition face, 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.

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

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:

- 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,

- 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.

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

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.

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

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 fluorourethane acrylate or fluorosilicone 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.

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.

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 bi-component crosslinking by chemical reaction. Crosslinking by UV(A) is preferred because crosslinking is faster and the equipment less expensive/more compact than by chemical reaction.

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

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

In a third example of an optical isolating coating, a crosslinkable UV resin based on silicone is deposited on the preferably polymer and even PET film.

The optical isolating coating (clear or tinted) may comprise, or even consist of, a matrix with a refractive index n2 _m greater than n2 and less than n1 or n'1, and with n2 _m preferably 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 less than n1 or n'1, in particular hollow particles of size (external diameter) of at most 300 nm or even of at most 100 nm, for example hollow silica nanoparticles. Preferably, the optical isolating coating is free of free silicone, of volatile silicone component (source of surface pollution).

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. 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.

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%.

The refractive index n2 can be adjusted as a function of 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 _eff where f is the volume fraction of the material constituting the layer and n2 _m its refractive index and n _eff is the index of the nanoporosity (equal to 1) or the effective index of the nanoparticles (hollow and/or porous or low index).

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

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

- 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

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

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

We can therefore choose silica produced from tetraethylsilane (TEOS)

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

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

The laminated glass roof (in particular the coated film) may comprise a transparent protective layer, coating, in particular polymeric (thermoplastic or crosslinked polymer), with a refractive index greater than n2, covering the optical isolating coating (on, preferably in direct contact with the optical isolating coating). In particular, it protects the optical isolating coating comprising (nano)porosities and/or low-index (nano)particles, in particular hollow ones.: The transparent protective layer between the optical isolating coating and the light extraction means, in particular diffusing coating and in particular in contact with the lower interlayer or the other lower interlayer.

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

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), is compatible with passage in an autoclave.

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 non-sticky film at room temperature.

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.

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

For protection purposes, preferably, the periphery of the transparent film (and even the coated substrate), in particular polymer and even PET, can be surrounded, in contact (adhesive), with a part of the lamination interlayer (PVB, EVA, TPU etc.) for example at least 5 mm wide. - either from the creep of the lower interlayer and/or from the creep of the upper interlayer or an additional interlayer

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

In one embodiment, the transparent film is set back from the first or second slice by at least 10 mm and even by 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).

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.

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.

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

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 intermediate frame layer above this light redirection element can be tinted or even opaque, black in particular to mask any stray light. 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, i.e. with at least one radius of curvature of at most 0.5 m, locally.

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

The thicker the transparent film, the less likely it is to deform and make waves. For example, a thickness of at least 100 pm can be chosen in the case of a highly spherical area of the roof.

The coated film (of the substrate), in particular polymer and even thermoplastic, in particular PET, can have a surface area of at least 1 m in length and at least 50 cm in width. The coated film (substrate), particularly polymer and even thermoplastic, particularly PET, can occupy 100% of the glass clear.

The coated film (of the 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 on the periphery in particular, by a material in particular a lamination interlayer).

The coated film (substrate), especially polymer and even thermoplastic, especially PET, can be of any shape, depending on the design of the roof, with rounded corners etc.

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,

- polycarbonate (PC),

- polyacrylate, in particular thermoplastic, polybutylacrylate, polymethacrylate PMMA,

- polyurethane (PU), cross-linked material,

- cellulose triacetate (TCA),

- polyolefin: polypropylene (PP), polyethylene (PE),

- polyimide, polyamide, a (coextruded) PET-PMMA film,

- poly(vinyl chloride) PVC.

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

The transparent film, in particular polymer and even PET, is preferably of thickness Ef of at least 30 pm and preferably less than 200 pm, in particular at most 100 pm.

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

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 made of crosslinked adhesive material is, for example, a polyacrylate sheet.

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.

The lamination interlayer (one of the lower, upper or additional interlayers) may be acoustic in particular comprise or consist of a PVB acoustic (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. We can cite the acoustic PVBs described in patent applications WO2012/025685, WO2013/175101, in particular tinted as in WO2015079159

The upper interlayer can be tinted, in particular with a light transmission known as TL of at most 73%, in particular tinted PVB.

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

The lower interlayer may in particular have a TL of at least 90% and better still at least 95% or 97%.

The lower interlayer (in particular PVB or even cross-linked 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 frame interlayer can flow to protect the edges of the coated substrate.

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)

The tinted interlayer in the glass clear is preferably gray.

The tinted glass frame interlayer can be grey, black (opaque or almost opaque), preferably thermoplastic and even PVB-based (with or without plasticizers).

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) in particular with an index n3 (or n’3) greater than 1.42.

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

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.

In particular, the lower interlayer is a pressure-sensitive film (PSA in English for Pressure Sensitive Adhesive), glued by contact after application of mechanical pressure.

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:

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

- 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.

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

In the first configuration i) the lower lamination interlayer is 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).

In the second configuration j) the other lower interlayer is clear and thermoplastic chosen from: EVA, TPU, PVB with plasticizers of thickness of at most 380pm, PVB or little or no plasticizers of 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.

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

- 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) EVA) or adhesive cross-linked polymer material (EVA, adhesive polyacrylate etc.) / second sheet of glass (extra-clear)

- first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 side) / upper thermoplastic interlayer (PVB, TPU or EVA) / coated substrate / lower (clear) thermoplastic interlayer (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) / upper thermoplastic lamination 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 / other lamination interlayer / third glass or polymer sheet

- 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).

For example preferably:

- first glass sheet (tinted or clear with electrically conductive coating, reflecting IR surface F2) / upper thermoplastic PVB interlayer (clear or tinted) / coated substrate / lower interlayer (clear) thermoplastic PVB or adhesive cross-linked polymer material (EVA, adhesive polyacrylate etc.) / second glass sheet (extra clear)

- 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).

- 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). Naturally, the laminated glass roof can include a light source in optical coupling with a light guide arranged under the optical isolating coating (further from the F2 face than the optical isolating coating).

The light source can be removable, added, sold separately or as a kit.

Naturally, the second sheet (respectively the third sheet) is an operational light guide once their light source is mounted.

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

Preferably, the diodes are surface-mounted components on the front face of a printed circuit board called a PCB board (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 board, in strip form, is preferably at most 5cm, better still at most 2cm, and even at most 1cm.

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

The light extraction means can 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.

The roof may comprise a plurality of diffusing zones of identical or distinct sizes and/or shapes. 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 light frame, logos or patterns, etc.).

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

Preferably the film with diffusing coating (and optical isolating coating) has a light transmission of at least 80% and a haze of at most 30%.

In particular, the diffusing coating, preferably transparent, comprises a binder and diffusing particles, preferably a binder with a refractive index n5 greater than or equal to n1 (or even to n3) or to n'1 (or even to n'3), in particular of at least 1.48, which is preferably on the rear face side Fb, in particular on the optical isolating coating.

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

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 fluorinated function (in particular the diffusing coating is directly on the optical isolating coating) and/or with low index nanoparticles or nanoporosities.

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

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).

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

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

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.

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.

A polymer layer according to the invention (optical isolating coating, diffusing coating, intercalary 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.

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).

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:

- crosslinking agent e.g. photoinitiators (residual), - plasticizers (for more flexibility)

- membership promoters

- additives for durability.

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

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, forming an optical guide:

- 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.

- by all or part of the second tranche,

- 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 by a clear window, facing an internal masking layer.

In the case of injection of light by the second slice, the light source is coupled to the slice of the second sheet possibly in a peripheral notch emerging. The light source can 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, replacement of the source.

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 side at least) under an internal masking layer (excluding 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.

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 slice called the injection slice, possibly with a notch housing the source or preferably the injection slice (longitudinal or lateral) set back by at least 10 mm and at most 200 mm from the second slice, thus leaving a zone called exceeding the second sheet the light source being under or even fixed to the exceeding area.

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

-reflector and third face F3 side in particular prismatic, comprising reflector prisms in particular oriented towards the third face F3 or towards the second face F2

- or transparent side fourth main face F4 in particular comprising a macroprism or transparent prisms, preferably prisms oriented towards the passenger compartment.

The 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.

An optical element (collimation etc.) can be provided 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 of the light source (before or after collimation) can be adjusted.

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 face F6 side), and a light redirection element (local, peripheral), which is preferably a reflecting prismatic element, on the third face F3 side (respectively face F5 side), comprising reflecting 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 face F6). The redirected light propagates between the fourth face F4 and the optical isolating coating.

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.

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 reflective or transparent prismatic polymer film, is:

- at least partially opposite the optical isolating coating

- or at most 4mm, preferably at most 1mm, from the optical isolating coating. Preferably (in the first configuration i)), the reflective light redirecting element, in particular reflective prismatic element, is preferably above at most 30 pm from the coated face or in the plane of the coated face or closer to the third face F3.

The base or top of the prisms of the reflecting prismatic element, in particular reflecting prismatic film, is preferably above at most 30 pm from the coated face or in the plane of the coated face or closer to the third face F3.

The reflective light redirecting element may comprise a (textured) prismatic 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 layer (polymer) with an arrangement of (micro)prisms and with a reflective coating forming a conformal deposit -.

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.

The reflective light redirection element (comprising a textured film, in particular polymeric, prismatic or a substrate film, in particular polymeric and a textured, prismatic layer, as well as a reflective coating) can be glued 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.

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

The film, in particular a 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 reflector 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 reflector microprisms, tinted and even opaque black.

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

In particular, the light redirection element is a reflecting prismatic element, comprising reflecting prisms, arranged on the third main face F3, is:

- 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 - in the lamination interlayer, in particular based on PVB:

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

- 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)

- 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.

Preferably, the redirecting prismatic 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). It can be a rectangular strip with rounded corners for example.

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

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.

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

Microprisms, for example, have a triangular section. Prisms are, for example, contiguous.

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).

The (each) light source on the fourth face may be associated with collimation optics. The light source with a possible collimator may be fixed on the fourth face, by direct gluing or by being spaced and on a peripheral support fixed on the fourth face. The interlayer frame, in particular opaque, can cover the light redirection element (reflective prismatic film).

The possible inner peripheral masking layer (on face F4) may include a spacer 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 longitudinal shape, in particular rounded in the corners, for example the length of the window clear. This redirecting film can be of thickness of at most 0.5mm or 0.4mm and in particular of at least 50pm, 100pm.

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 (in particular a prismatic redirector 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.

The edge of the light redirection element, in particular a prismatic element and even a reflector, may be at least 10 mm away 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.

The internal masking layer is not necessarily opaque enough to not see stray light, the light source on the fourth face F4. We may want an internal opaque element, peripheral and between the second and third faces, in particular between this internal masking layer (delimiting the clear glass) and the third face or even replacing this internal masking layer.

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.

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

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

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

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

- in particular an opaque layer for example on the peripheral part of the transparent film (of the coated substrate) - or interlayer, in particular thermoplastic such as PVB (zone - excluding the clear glass - of the lower or additional interlayer or frame or upper layer locally opaque or all around).

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

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

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

- 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, other means of extracting light, between the second face and the optical isolating coating.

- functional polymer film, for example infrared reflective film (solar control, silver stacking, replacing a layer on the F2 face), and/or heating, for example polymer substrate with an electrically conductive coating (transparent), 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 electrically conductive coating on the F2 face or F3 face side

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 of less than or equal to 0.2 mm, the thermoplastic material can flow sufficiently.

Preferably for any functional element (particularly polymer film) 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.

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

The roof may also comprise between the upper interlayer and the lower interlayer, above said optical isolating coating, at least one of the following functional elements:

- 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,

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

- 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.

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

An interlayer frame, in particular 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:

- the functional element

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

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

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

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.

Typically, the two electrodes are arranged between two carrier films, usually made of PET. Commercially available multilayer 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. 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 a strong scattering of 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 that the liquid crystals are ordered in a stress-free state and that 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 connection with 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.

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

In another preferred embodiment, the functional element is an SPD element (suspended particle device). 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 connection with 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.

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 for achieving 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. 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.

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.

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 coloring agent) on a main face of a PVB on the second or third face.

The internal masking layer can be 2 mm or 3 mm (less than 5 mm) 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.) in particular 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 in particular delimits 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.

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.

In particular, another masking layer, called the internal 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.

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

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

- 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.

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. The internal and/or interior 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.

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

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

- 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 glass clear

- 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,

- an internal opaque element, peripheral 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

- 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 polymer

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

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. As an ITO stack for face F4 or F6, mention may be made of those described in patent US2015/0146286, on face F4, in particular in examples 1 to 3.

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

- a dielectric coating comprising dielectric layers such as silicon nitride and/or silicon oxide layers,

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

Tl - a dielectric coating comprising dielectric layers such as silicon nitride and silicon oxide layers.

The first and second sheets (and possibly third sheets) may be of substantially identical shape and size, for example generally rectangular or quadrilateral shape (non-parallel longitudinal edges), possibly rounded corners,

The first sheet may be larger than the second sheet, thus exceeding this second sheet on at least one part (one side or several adjacent or opposite sides) of its perimeter, 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 perimeter, in particular useful when the second sheet is optically coupled by its peripheral edge to a light source.

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.

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

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.

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 Fe ₂ C>3) of at least 0.4% and preferably at most 1.5%.

To limit absorption, the second mineral glass sheet may be in particular based on silica, soda-lime, silicosodo-lime, or aluminosilicate, or borosilicate, has a weight content of total iron oxide (expressed in the form Fe ₂ Os) 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.

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

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

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

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.

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°).

- 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 (clear) thermoplastic interlayer (PVB, TPU or EVA) or adhesive cross-linked polymer material (EVA, adhesive polyacrylate etc.) / second glass sheet (extra-clear)

- 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 (clear) thermoplastic interlayer (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 face) / 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 (clear) thermoplastic interlayer (PVB, TPU or EVA) or adhesive crosslinked polymer material (EVA, adhesive polyacrylate etc.) / second glass sheet / other lamination interlayer / third glass or polymer sheet

- first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 face)/ upper thermoplastic interlayer (PVB, TPU or EVA) or adhesive cross-linked polymer material (EVA, adhesive polyacrylate etc.)/ functional element (tinted or variable 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 (extraclear).

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 cross-linked polymer material (EVA, adhesive polyacrylate etc.) / second glass sheet (extra clear)

- first glass sheet (tinted or clear with electrically conductive coating, reflecting IR on F2 face)/ 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).

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

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

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 and preferably at least 3% or at most 1% in the tinted state with a variable tint device is chosen.

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

The window clear is thus a central area. 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 the areas covered by an 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. The lamination interlayer may occupy at least 70%, 80%, 90%, 95% or even 100% of the surface area of the glazing.

The second face F2 can be the tin face or the opposite face or the first face F1 can be the tin face.

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.

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

Figure 1 shows a schematic cross-sectional view of an illuminated laminated glass roof 100 of a motor vehicle according to the invention in a first embodiment. Figure 1a shows a detailed view of the reflective prismatic film used to redirect the light. Figure 1’ shows a schematic front view of the roof of Figure 1. Figure 1” shows a schematic front view of a variant of the roof 100.

Figure 2 shows a schematic sectional view of an illuminated laminated glass roof 200 of a motor vehicle according to the invention in a second embodiment.

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

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

Figure 7 represents a schematic cross-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 glazing of Figure 7.

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. 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.

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

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

Figure 10’ represents a schematic sectional view of an illuminated laminated glass roof 1001 of a motor vehicle according to the invention in an embodiment with a third sheet.

Figure 10” shows 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. Figure 11 shows a schematic sectional view of an illuminated laminated glass roof 1100 of a motor vehicle according to the invention in an eleventh embodiment. Figure 1T shows a schematic sectional view of the electrically controllable variable diffusion device inserted in the roof of Figure 11.

Figure 12 shows a schematic sectional view of an illuminated laminated glass roof 1200 of a motor vehicle according to the invention in a twelfth embodiment.

Figure 13 shows a schematic sectional view of an illuminated laminated glass roof 1300 of a motor vehicle according to the invention in a thirteenth embodiment.

Figure 14 shows a schematic sectional view of an illuminated laminated glass roof 1400 of a motor vehicle according to the invention in a fourteenth embodiment.

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

Figure 16 shows a schematic sectional view of an illuminated laminated glass roof 1600 of a motor vehicle according to the invention in a sixteenth embodiment.

Figure 17 shows a schematic sectional view of an illuminated laminated glass roof 1700 of a motor vehicle according to the invention in a seventeenth embodiment.

Figure 18 shows a schematic sectional view of an illuminated laminated glass roof 1800 of a motor vehicle according to the invention in an eighteenth embodiment.

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

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

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

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

- a first sheet of glass 1, for example rectangular (with dimensions of 1600X1100 mm for example), with a tinted composition (VENUS VG10 or TSA 4+ glass marketed by the company Saint-Gobain Glass with a 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,

- a second transparent sheet, preferably mineral glass, 2, here of the same shape and dimensions as the first sheet 1, forming internal glazing, on the 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 with a TL of at least 91%, with a thickness equal to, for example, 2.9 mm, glass with a refractive index n1 of the order of 1.52 to 600 nm or Optiwhite glass of 1.95 mm, or Sunmax glass of 2.05 mm.

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 comprises:

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

- 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), 0.38 mm or 0.76 mm (in one or two sheets) in adhesive contact with the F3 face, with a refractive index n3 of approximately 1.48 at 600 nm, for example PVB of TL at 99.9%.

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.

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). 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: - a black enamel on the face F2

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

- 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.

To optically isolate a lower part (with light guide and light extraction) and the tinted, absorbent upper part, the laminated glass roof 100 further comprises an optical isolating coating 5 on one of the front faces Fa 5T (face side F2), or on the rear face Fb 52' (face side F3), as here, then called the face coated (or deposited) with 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 of the glass and beyond, its edge 50, 50' being under the masking layer 7.

The coated substrate is set back from the edges 10, 10’, 20, 20’ of the sheets 1, 2 in particular by at least 10 mm. The transparent film and even the coated substrate is here of thickness less than 200 pm or even at most 100 pm 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.

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 400 nm and better 500 nm or 800 nm, 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.

The 5’ film is transparent but can be tinted.

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

In one configuration, the optical isolating coating comprises a crosslinked polymer matrix with said index n2, preferably of at most 1.42 and even of 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 10pm or 5pm or 2pm and at least 800nm.

In one configuration, the optical isolating coating comprises a matrix with a refractive index n2 _m greater than n2 and less than n1 , and with n2 _m preferably of at most 1.48 and n2 preferably of at most 1.42 and even at least 1.35, and comprising (nano)porosities and/or (nano)particles of low index, of refractive index less than n1 , in particular hollow, of size of at most 300 nm or even 100 nm, for example hollow silica nanoparticles. The thickness is preferably at most 10 pm or 5 pm or 2 pm and at least 800 nm. 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.

Alternatively, the 5’ film is an ultra-thin glass and/or the 5’ coating is porous silica.

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.

For example, 5’ transparent film is a clear PET of less than 200pm, particularly 100pm or 75pm, with a TL of around 90% or more.

For the light function, the laminated glass roof 100 also comprises, masked from the outside by the internal masking layer 7:

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

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

For example, the reflective prismatic film is polymer prismatic film 8, as shown in detail view in Figure 1a with:

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

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

Here the reflecting prismatic film 8 is glued with glue 60 on the third main face F3, it can also be held by suction. The microprisms are schematically cross-sectioned as right triangles, but the apex angle can be adjusted to better redirect towards the extraction means. In the same way the main direction of emission of the light source can be adjusted.

A collimator can be added between the F4 face and the diodes.

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.

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.

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.

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

The light from the diodes is refracted in the second glass, in the reflecting prismatic film 8 then redirected at a given angle towards the light extraction means 6, for example diffusing ink and as transparent as possible if desired, and in the clear glass.

The reflecting prismatic film 8 is here under the optical isolating 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 5T 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 face side, downstream of the diodes.

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

The means can therefore be doubled by adding another light source 4’ on its support 40’, another reflector prismatic film 8’ along the other longitudinal edge 10’ as seen in figure 1”. The longitudinal edges 10, 10’ here are not parallel. In particular, it is possible to have on each side a set of diode strips on supports 40 that are separate or connected to each other. They can also be placed on the front or rear edges.

To simplify the manufacturing process, the extraction means 6 are a diffusing, polymer coating, deposited on the optical isolating coating 5, for example here patterns extended or punctual geometric shapes, in particular with a width of at most 10 mm to avoid the phenomenon of shading.

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

For example, the extraction means are a diffusing coating (network of disjointed and/or interconnected patterns) covering at most 50% or 40% of the glass clear to promote adhesion with the lower interlayer 32. The diffusing coating 6 deposited by liquid means (by ink jet, screen printing, etc.).

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

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 coating 6, it may be a diffusing film, placed or glued to the rear face 52’ of the film 5’.

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

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

Several series of 4 diodes (one edge, two edges, three edges, on the entire periphery) can be provided, controlled independently and even of different colors.

For the manufacture of the roof we can:

- stack the different elements 31, 5’ with 5, 32 on the second sheet of glass 2 then proceed with the lamination

-or stack the different elements 32, 5’ with 5, 31 on the first sheet of glass 1 then proceed with the lamination.

This 200 roof differs from the previous 100 roof in that:

- adding another 4' light source on 40' support and another 8' prismatic reflector film on an opposite edge (or alternatively adjacent) and adding an internal opaque element - the internal opaque elements T 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

- the upper interlayer 31 is tinted, for example, gray

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

In addition, a transparent protective layer 53, in particular polymeric, with a refractive index greater than n2, of submillimeter thickness and even of at most 100 pm or even 30 pm, is on and covers the optical isolating coating 5 in particular for mechanical protection purposes if the optical isolating coating comprises (nano)porosities and/or (nano)particles of low index in particular hollow.

This transparent protective layer is here a protective coating 53, deposited on the optical isolating coating 5. It can be the same matrix as the optical isolating coating 5 without the (nano)porosities and/or low index (nano)particles.

The diffusing coating 6, for example a set of patterns of identical width, is therefore deposited on this protective transparent layer 53.

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.

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.

Figure 3 shows a schematic cross-sectional view of an illuminated laminated glass roof 300 of a motor vehicle according to the invention in a third embodiment. Figure 3a shows a detailed view of the reflective prismatic film then used to redirect the light. This roof 300 differs from the roof 100 in that:

- the outer glass 1 is clear, in particular a 2.1 mm Planiclear glass with an IR-reflecting coating (silver stacking, 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

- the prismatic film 8 has been moved (detailed view in figure 3a) on the rear face 51 and returned the reflecting prisms (the reflective coating) are oriented towards the face F3

- 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) The diffusing coating 6 is on the rear face 52' in an area possibly without the optical isolating coating 5 which is then discontinuous.

With such a reversed 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 which is tinted and even opaque and then the element 7' can be more optional. The reversed film (with opaque part preferably) can be adjacent to the coated substrate (internal edge 80' close to the edge 50'). The reversed film and the light source can be split (as in figure 2).

Figure 4 shows a schematic cross-sectional view of an illuminated laminated glass roof 400 of a motor vehicle according to the invention in a fourth embodiment. Figure 4a shows 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:

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

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

The diffusing coating 6 remains printed on the rear face 52’.

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

This 500 roof differs from the first 100 roof in that:

- the upper interlayer 31 is for example tinted in particular gray

- 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)

- 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 F3).

The internal opaque element 7’ is omitted, in particular the gray PVB can suffice.

We have doubled the light source and prismatic film reflectors 4’, 40, 8’.

The internal edge 80’ of each reflective prismatic film 8, 8’ is at most 4 mm, preferably at most 1 mm, from the external edge (of the edge 50) of the optical isolating coating and is even in contact with the edge 50’ of the film 5’.

The diffusing coating 6 is printed on the back face 52'. Figure 6 shows a schematic sectional view of an illuminated laminated glass roof 600 of a motor vehicle according to the invention in a sixth embodiment.

This 600 roof differs from the previous 500 roof in that:

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

-- a 17 low emissivity coating is opposite F4

- 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 side F3), on the front face 5T of the coated substrate

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

The diffusing coating 6 remains printed on the rear face 52’.

It is possible to split the light source and prismatic film reflectors 4’, 40’, 8’.

Figure 7 shows a schematic cross-sectional view of an illuminated laminated glass roof 700 of a motor vehicle according to the invention in a seventh embodiment. Figure 7’ shows a schematic front view of the roof 700.

This roof 700 differs from the first roof 100 in that the film 5’ is 200pm or more and to compensate for this high thickness an interlayer frame layer 34 is added, in 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 layer 32 always at the level of the prismatic film 8. It can be a black PET or even a black ink on PVB 34 or 32.

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

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

This 800 roof differs from the previous 700 roof in that:

- added light source and 4’, 40’ prismatic film.

- the optical isolating coating 5 is on the front face 5T, so the film 5’ is chosen clear,

- the lower interlayer 32 is 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 even a PSA pressure-sensitive film for example polyacrylate of at least 30 pm.

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

The diffusing coating 6 is printed on the back face 52’.

Figure 8’ represents a schematic sectional view of an illuminated laminated glass roof 800’ of a motor vehicle according to the invention in a variant of the eighth embodiment.

This 800’ roof differs from the previous 800 roof in that:

- the optical isolating coating 5 is on the back face 52’, the PET 5’ is clear or tinted,

- possibly the light source and prismatic film 4, 4’, 40, 40’ have been moved further to the edge, under the frame layer 34

- the opaque element 7’ is moved accordingly

- a low emissivity layer 17 is opposite F4.

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

The diffusing coating 6 is printed on the optical isolating coating 5 on the rear face 52’.

This 900 roof differs from the seventh 700 roof in that:

- the PVB 34 intercalary frame layer here is opaque with a TL of at most 5% or even 0%, forming an internal opaque element

- possibly the prismatic film 8 reflector 8 is moved here embedded in the lower interlayer 31

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

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).

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.

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.

Alternatively, the source 4 is housed in a hole in the second sheet 2. Figure 10' represents a schematic sectional view of an illuminated laminated glass roof 1001 of a motor vehicle according to the invention in an embodiment with a third sheet, illustrating the second configuration j).

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, PMMA), 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 to 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.

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 in 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.

The diffusing coating 6 is printed on the optical isolating coating 5 on the rear face 52’. The light injection is via the longitudinal (or lateral as a variant) edge 2T 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.

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.

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

Figure 10” shows 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:

- the 4’ diodes are side-emitting

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

- an IR 17 reflective coating is on the sixth face F6 16. - the film being at least 200pm, we preferably add an intercalary frame layer 34' between layers 31' and 32'

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

The diffusing coating 6 is printed on the back face 52’.

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

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.

The thickness of the device being 0.4 mm, an intermediate frame layer 35 with a thickness of 0.38 mm is added, in PVB, clear or tinted. The edges of the device 9 are under the internal mask layer 7.

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

The coated substrate 5’, 5 is then in adhesive contact with the additional interlayer 33 and the lower interlayer 32.

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).

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

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

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

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

- a second 9T support (125pm PET for example) with a second electroconductive coating (for example ITO) 92’ on the third face F3:

The electrically conductive coatings 92, 92' on the periphery are not covered by the electroactive layer 93 and are placed current supply strips 90 for the power supply. In particular, the supports 91, 9T protrude on two opposite sides.

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 means of glued or contacting PET polymer strips.

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

This 1200 roof differs from the previous 1100 roof in that:

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

- we add a light source 4’ on its support 40 and another prismatic reflector film 8’. The prismatic reflector films are glued to the coated substrate as in figure 3.

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

The diffusing coating 6 is printed on the back face 52’.

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).

Alternatively, the additional layer 33 is the size of the device 9 and the coated substrate 5, 5’, so an intercalary frame layer is added.

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

The diffusing coating 6 is printed on the back face 52’.

This 1300 roof differs from the eleventh 1100 roof in that:

- the prismatic film is on the front face 5T, in adhesive contact with the additional layer 33.

The diffusing coating 6 is printed on the back face 52’.

This roof 1400 differs from the eleventh roof 1100 in that the light injection is through the edge 20 of the second sheet (the reflecting 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.

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

This 1500 roof differs from the eleventh 1100 roof in that:

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

- the optical isolating coating 5 is protected by a protective layer 53, coating deposited on the substrate

- the internal edge 80’ of the prismatic film 8 (on the face F3) is under the edge 50’ of the film 5’. The diffusing coating 6 is printed on the protective layer 53.

This 1600 roof differs from the eleventh 1100 roof in that:

- the optical isolating coating 5 is on the front face 51’, in contact with the additional layer 33

- film 5 is thick, an intercalary frame layer 34 is added, clear, tinted or even opaque

- we add a 4’ light source and an 8’ prismatic reflector film on the opposite edge

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

The diffusing coating 6 is printed on the back face 52’.

If necessary, an internal masking layer 71 is on the face F6 16 without hindering the injection of the light source 4 (width possibly locally reduced).

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 interlayer upper 3T and another lower intercalary layer 32' in contact with the fifth face F5 and of refractive index n'3 in the visible.

The light injection is via 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.

The optical isolating coating 5 is on the front face 5T, in contact with the additional layer 33. The diffusing coating 6 is printed on the rear face 52’.

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

This 1800 roof differs from the previous 1100 roof in that

- 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 - preferably an IR reflecting coating 17 is opposite F6.

The diffusing coating 6 is printed on the back face 52’.

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.

The diffusing coating 6 remains printed on the optical isolating coating on the rear face 52’. Preferably the upper interlayer 31 is clear, for example PVB, and the outer glass 1 is clear.

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).

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), a fourth opposite main face F4 (14) and a second edge (20), and the roof comprising an optical isolating layer (5), transparent, with a refractive index n2 in the visible, optical isolating layer of submillimetric thickness Ei and of at least 400 nm, 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 submillimeter thickness Ef,

- the optical isolating layer which is an optical isolating coating (5), made of material comprising a distinct matrix of a fluoropolymer, on one of the front faces Fa or back faces Fb, called the coated face, and a slice (50),

- light extraction means, preferably diffusing coating (6) 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 to the second sheet via another lamination interlayer (31', 32') comprising another interlayer upper (3T) and another lower interlayer (32') in contact with the fifth face F5 and of 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. Illuminable laminated glass roof of 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 and in that the thickness Ei is at least 500 nm and even at least 800 nm.

3. Illuminated laminated glass roof of a vehicle (100) according to one of the preceding claims, characterized in that the optical isolating coating (5) is on the rear face Fb (52'), the light extraction means, in particular the diffusing coating (6), are on the optical isolating coating (5), in direct contact with the optical isolating coating or in contact with an intercalated layer.

4. Illuminated laminated glass roof of a vehicle according to one of claims 1 or 2, characterized in that the optical isolating coating (5) is on the front face Fa (5T), and preferably the light extraction means, in particular diffusing coating (6) on the rear face (52').

5. Illuminable laminated glass roof of a vehicle according to one of the preceding claims, characterized in that the lamination interlayer (3) or the other lamination interlayer (3T, 32') is in adhesive contact with the coated substrate on the coated face side and on the face side opposite the coated face, the lamination interlayer (3) or the other lamination interlayer (3T, 32') is in adhesive contact with the light extraction means, in particular diffusing coating (6) and in contact with the optical isolating coating.

6. Illuminable 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 of 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. Illuminable 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 with n2 _m preferably 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 less than n1 or n'1, in particular hollow, of size of at most 300 nm.

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 of 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, covers the optical insulating coating, transparent protective layer

- between the optical isolating coating and the light extraction means, in particular the diffusing coating (6)

- in particular in contact with the lower interlayer or the other lower interlayer.

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 intermediate frame layer (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. Illuminated 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 of a vehicle according to one of the preceding claims, characterized in that it comprises a light source (4) in optical coupling with a light guide arranged further from the second face F2 than the optical isolating coating.

13. Illuminable laminated glass roof for a vehicle according to one of the preceding claims, characterized in that the light extraction means (6) comprise 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 n'1, in particular at least 1.48, which is preferably on the rear face side Fb, in particular on the optical isolating coating.

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 polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, 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 coating Optical isolator is a polyacrylate polymer, in particular polyacrylate with fluorinated function and/or with low index nanoparticles or nanoporosities, in particular the diffusing coating is directly on the optical isolator coating.

16. Illuminated 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 light redirection element (8, 8') which is a reflector and on the third face F3 side, in particular a light redirection element which is a reflector prismatic element comprising reflector 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. Illuminable 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 reflecting prismatic element on the third face F3 side, comprising reflecting 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 17 or 18, 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 rear face Fb, the reflecting prisms being on the second face side F2 or on the third face side F3.

19. Illuminable laminated glass roof for a vehicle according to one of the preceding claims, characterized in that it comprises between the upper intermediate layer (31) and the lower intermediate layer (32), above said optical insulating coating, a device electrically controllable, 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 with one or more photovoltaic cells 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 glass 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 (71) which is between the second face F2 and the third face F3, in particular for internal masking of a light source and a light redirection element

- an internal electrically conductive 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 polymer

- an external electrically conductive coating (17) 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 )).

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