WO2025099090A1 - Illuminable laminated glazing for a vehicle - Google Patents

Abstract

The invention relates to illuminable glazing (100) for a vehicle, comprising an outer glass sheet (1), an inner sheet (2), a lamination interlayer (3) and a peripheral masking layer (4). The outer sheet has a rounded edge; the outer edge, for all the outer perimeters, is set back r1 by zero or at most 0.2 mm from the start of the rounding of the first edge, and it includes an opaque peripheral seal (8), which is a polymeric profiled section or encapsulation of the edge of the glazing, framing the laminated glazing.

Description

DESCRIPTION

TITLE: ILLUMINABLE LAMINATED VEHICLE GLAZING

[0001] The present invention relates to an illuminated laminated vehicle glazing, in particular a vehicle roof, illuminated by guiding and extracting light, for internal ambient lighting.

[0002] Illuminatable luminous roofs are known which are laminated glazings provided with one or more light sources optically coupled with the inner sheet, light sources masked from the outside by the black enamel masking layer on a main face of the inner glass sheet. A light extraction layer on the inner glass sheet forms, for example, patterns. These patterns are illuminated by extracting the light guided in the inner glass sheet, which provides a very aesthetic visual effect, particularly at night and when observed from inside the passenger compartment.

[0003] Unfortunately, a peripheral light cord visible from outside the vehicle was observed on these illuminated roofs.

[0004] The present invention thus aims in particular to provide illuminated vehicle glazing reducing and even cancelling this parasitic light effect at the edge of the glazing.

[0005] For this purpose, the present invention provides an illuminable laminated glazing for a vehicle, comprising a laminated (curved) glazing with an edge, laminated glazing comprising an outer glass sheet with a first edge (in particular bare, i.e. without a layer, coating and/or adhesive, edge possibly polished, rounded) and a first main face called face F1 and a second main face called face F2, an inner transparent sheet (preferably glass, extra-clear) with a second edge (in particular bare, i.e. without a layer, coating and/or adhesive, edge possibly polished, flat or preferably rounded, in particular like the first edge), an outer main face called face Fa oriented towards face F2 (in particular third main face F3) and an opposite inner main face called Fb (Fb being the innermost of the main faces of the glazing, in particular fourth main face F4, a lamination interlayer between face F2 and face Fa with an edge called an interlayer, and a peripheral masking layer which is a coating (printed, in particular screen-printed) on face F2, having an internal edge between faces F2 and Fa and an external edge.

[0006] The outer sheet has a (first) rounded edge, the outer edge, on all the outer edges has a withdrawal r1 of zero or at most 0.2 mm of said birth of the rounding of the first slice. And even the inner sheet can have a (second) rounded slice.

[0007] The illuminated laminated glazing according to the invention further comprises an opaque peripheral seal, which is a profile or a polymeric encapsulation of the edge of the glazing, framing the laminated glazing.

[0008] For reasons of the manufacturing process of a laminated glazing of the prior art such as a roof, the enamel coating is set back r1 by a few mm, the second slice is, on several edges, offset from the first slice, conventionally up to 1 mm.

[0009] The Applicant has identified that this results in a path for light leaving the second slice to propagate (by refraction and/or reflection and/or diffusion) to the vicinity of the first slice, in particular in the area of the withdrawal of width r1 or even in the area of the rounding.

[0010] The illuminated glazings of the prior art therefore give rise to light leaks at their periphery instead of remaining guided and extracted and being visible only inside the glazing, thus generating the light cord visible from outside the vehicle.

[0011] The almost zero or zero shrinkage r1 makes it possible to use the masking layer as a barrier against light rays likely to escape at the periphery of the glazing, in cooperation with a peripheral seal placed on the edge of this glazing. The shrinkage r1 is substantially identical from one edge to the other.

[0012] In a configuration with encapsulation, the opaque polymeric encapsulation is in contact with the edge of the glazing.

[0013] The (quasi) masking layer on the rounded (ground) edge, covers the last area that light can transmit to the outside, and the encapsulation fills the rounding (the ground surface) of the glass to block the rest of the light.

[0014] The encapsulation technique, known per se, consists of molding the peripheral seal in situ over the thickness of the glazing: the seal thus obtained, perfectly matches the profile of the edge of the glazing, and fills all the unevenness of this profile. In other words, no area of this edge remains bare, and the seal preferably extends on face Fb (F4) under the periphery of the inner face of the inner glass sheet. The adhesion promoter (or primer) used in the encapsulation process, being generally black in color, can help to mask light leaks by covering the edge of the glazing, in particular on the second edge and the first edge.

[0015] In a configuration with profile, the opaque profile is in contact with the first slice of the glazing.

[0016] The (quasi) masking layer on the rounded (ground) edge, covers the last area that light can transmit to the outside, and the profiled seal also blocks the light from the rounded edge (with a ground surface), only a small amount of light leaks outwards. This small amount of light that can escape outwards may be considered acceptable in certain cases. Otherwise, a peripheral opaque element linked to the lamination interlayer is used between the start of the rounded edge and the first slice.

[0017] The profiled seal may be made of polymeric material, in particular thermoplastic (flexible, single-hardness), PVC, TPE, in a polyurethane PU, rubber, EPDM, PP-EPDM in a synthetic rubber of the EPDM type, or in any other suitable material. The seal is preferably black (same color as the masking layer).

[0018] The profiled seal (compression seal, extrudate or injected molded, flexible polymer, in particular single-hardness, dual-hardness with rigid base) peripheral, has in particular an internal wall with a bearing surface in contact with the first edge, a fixing surface bonded by an adhesive (double-sided, woven adhesive, mechanically reinforced) to the face F4 and, and in particular a lateral surface facing (possibly spaced) the edge of the glazing which is under the face F2 in particular with a lateral zone facing the second edge and another lateral zone facing the interlayer edge. In particular, the seal has with an external wall having a peripheral lip, an internal, free surface, oriented towards the passenger compartment for example flush or projecting from the face Fb (F4), an external, free surface, flush or (sub) flush with the face F1, in particular sub-flush with the face F1 preferably at most at the level of half the thickness of the external sheet. The lateral surface can be flat, normal to the plane of the glazing, in particular aligned with the support surface or offset from the support surface (with a local straight or flared step, etc.), or even be of any other shape.

[0019] The laminated glazing preferably has, for simplicity, only two sheets, so Fa is the face F3 and Fb is the face F4. Alternatively, there are three sheets (the intermediate sheet preferably made of glass), Fa is the face F5 and Fb is the face F6.

[0020] Thanks to the invention, before possible encapsulation, the second slice can be bare (simply shaped, in particular rounded and even polished), it is not necessary to cover it with an opaque layer reflecting or absorbing light (paint, a double-sided reflector, etc.), which is a tedious and complex operation on an industrial scale. However, it is possible to use an opaque encapsulation primer (black, with carbon black, etc.) which also contributes to the barrier without being sufficient as such. [0021] The encapsulation has an internal wall in contact with the edge of the glazing and with the face Fb (F4). The encapsulation has an external wall having a lip, an external, free surface, oriented towards the passenger compartment, for example flush with or projecting from the face F1. The encapsulation can be made of polyurethane, particularly PU-RIM (reaction in mold). Other encapsulation materials are:

- preferably flexible thermoplastics: thermoplastic elastomer (TPE), polyvinyl chloride (PVC), ethylene-propylene-diene terpolymer (EPDM),

- rigid thermoplastics: polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene (PE), polypropylene (PP), polyamide (PA66), acrylonitrile butadiene styrene (ABS), ABSPC.

[0022] Concerning the possible peripheral opaque element, it is preferred that it be bound by the interlayer rather than a deposit on the face F2 etc., thus avoiding the application of an opaque solution (paste) on the first slice and/or the second slice, which can overflow, and lengthens the manufacturing time, which is not very compatible with industrial requirements.

[0023] From a manufacturing process point of view, it is easy to align the interlayer slice with the first slice. For example, deburring (brushing, abrasion) is carried out on the interlayer which may have crept beyond the first slice after lamination. In the case of an interlayer slice set back from the first slice, the cutting level of the interlayer can be chosen to take into account any creep.

[0024] The glazing may be devoid of a peripheral opaque element (on at least 3 or even 4 external edge zones) linked to the interlayer for reasons of economy.

[0025] Advantageously, the shrinkage r1 is zero and even the glazing is devoid of any peripheral opaque element.

[0026] Preferably no edge of the second slice (and even of the intermediate slice) protrudes from the first slice, at most the edge of the second slice (and even of the intermediate slice) is aligned with the first slice.

[0027] In particular, the extent of any possible shrinkage of the inner sheet can be limited in order to be able to maintain a fixing of the structure with a bead of glue preferably of at most 40mm or 30mm, in particular between 20mm and 30mm (bead 1cm to 1.5cm wide, 5mm thick) from the first slice.

[0028] Preferably, in particular the distance (taken in the plane of the glazing) between the start of the rounded edge (of the outer sheet) and the end of the rounded edge (of the outer sheet) is at most half the thickness of the (outer) sheet, in particular at most 1.5 mm or 1.2 mm. And even, in particular the distance (taken in the plane of the glazing) between the start of the rounded edge (of the inner sheet) and the end of the rounded edge (of the inner sheet) is at most half the thickness of the (inner) sheet, in particular at most 1.5 mm or 1.2 mm.

[0029] The first and/or second slice is preferably rounded (and polished) on all its edges. [0030] The rounding (of the outer and/or inner sheet) may be continuous from one corner to the other of the slice or with a flat part in the middle that is more or less extensive. Conventionally, the edges of sheets are rounded by grinding. The rounding may vary, in particular the distance of the rounding may vary depending on the wear of the grinding wheel. Each edge may have a slightly different rounding distance, typically with a variation of less than 0.5 mm from one edge to the other.

[0031] In the text any distance (withdrawal etc.) from the first slice is preferably from the extreme point of the rounding of the first rounded slice.

[0032] In the text any distance (withdrawal etc) from the second slice is preferably from the extreme point of the rounding of the second rounded slice.

[0033] In particular, the external edge is on all its edges called external edges with a withdrawal r1 of zero or at most 0.2 mm from the start of the rounding of the first edge. r1 can vary from one edge to the other, for example by less than 0.2 mm.

[0034] The masking layer may be a strip, in particular black, framing the glazing. 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 delimits in particular the clear glass. The width of the masking layer along the sides of a motor vehicle roof is generally less than that at the front or even at the rear. The width of the masking layer along the longitudinal edges may be at most 60 cm, in particular from 20 cm to 40 cm, as required. The masking layer is preferably a continuous layer (flat with a solid edge) or alternatively a gradient internal edge (set of patterns).

[0035] For reasons of manufacturing laminated glazing, it is sometimes necessary for an edge of the second slice to be aligned with an edge of the first slice (reference edge, by abutment during assembly of the inner and outer sheets). For example, it is not an edge with an optical coupling zone of the inner sheet (with a light source).

[0036] In one embodiment (with profiled seal or encapsulation), in 2 or better 3 external edge zones, the second slice is set back r3 from the first slice (by at most 1 mm) or even is aligned or set back from the external slice (by a value r2), and in at least one external edge zone, an edge, called a reference edge, preferably the front edge of a roof, of the second slice is aligned with the first slice. The interlayer slice may be aligned with the first slice on all the external edge zones. The glazing is optionally devoid of a peripheral opaque element linked to the interlayer. [0037] In one embodiment (with profiled seal or encapsulation), in 1, 2 or 3 or 4 external edge zones (preferably all the external edge zones), the slice of interlayer extends beyond the external edge (in the rounded zone) in particular by a distance r'2 (or called 2), and even preferably is aligned with the first edge. The glazing is possibly devoid of a peripheral opaque element linked to the interlayer.

[0038] In one embodiment (with encapsulation joint), in 1, 2 or 3 or 4 external edge zones (preferably all external edge zones):

- the interlayer slice is set back from the external slice (setback r’2)

- and the polymeric encapsulation is set back, preferably by at most 5mm or 3mm, from the external edge, possibly the second edge is set back or aligned with the interlayer edge.

[0039] In a configuration with encapsulation, when the face Fa (F3) and/or the rounded edge of the second slice protrudes from the outer slice (by a distance r2 or called d2) and the interlayer slice is set back from the first slice, there is a risk that one or more bubbles are present in the encapsulation material and can create a light bridge between the inner glass sheet and the outer glass sheet, in the absence of the peripheral opaque element in the rounded zone. Also, in the possible absence of the peripheral opaque element, it is preferred when the interlayer slice is set back from the second slice, in particular aligned or set back r'2 from the outer slice (for example set back r'2 of at most 5mm or 3mm or 2mm or 1mm), that the second slice is aligned or set back (r2) from the outer slice, for example by at most 5mm or 3mm. In particular, it is preferred that the second slice be set back from the interlayer slice, in particular by no more than 5mm or 3mm. This helps bubbles to escape.

[0040] In one embodiment (with profiled seal or encapsulation), in 1, 2 or 3 or 4 external edge zones (preferably all external edge zones):

- the interlayer slice extends beyond the outer slice (in the rounded area), and even preferably is aligned with the first slice.

- the second slice is between the outer slice and the first slice (in particular set back from the first slice, for example by at most 1 mm) and a peripheral opaque element linked to the lamination interlayer is between the outer slice and the first slice; in particular the outer slice of this peripheral opaque element protrudes from the second slice (and is aligned with the first slice).

[0041] In one embodiment (with profiled seal or encapsulation), in 1, 2 or 3 or 4 external edge zones (preferably all external edge zones):

- the interlayer slice extends beyond the outer slice (in the rounded area), and even preferably is aligned with the first slice. - the second recessed slice (r2) preferably at most 5mm or 3mm from the external slice or aligned with the external slice

- the glazing is possibly devoid of a peripheral opaque element linked to the interlayer or a peripheral opaque element linked to the lamination interlayer is (at least) between the external edge and the first edge (in particular aligned with), the external edge of this peripheral opaque element protrudes from the second edge (and is even aligned with the first edge).

[0042] In one embodiment (with profiled seal or encapsulation), in 1, 2 or 3 or 4 external edge zones (preferably all external edge zones):

- the second slice protrudes from the external slice (by a distance r2 or d2), in particular set back from the first slice,

- and a peripheral opaque element linked to the interlayer extends beyond the outer edge and with an outer edge preferably (substantially) up to the first edge. [0043] The possible peripheral opaque element can be continuous, or in pieces, abutted on several external edges, closely spaced, at the corners etc. The peripheral opaque element preferably forms a frame.

[0044] The peripheral opaque element can be:

- a film, in particular polymer, opaque in mass (polyester, polyethylene terephthalate, black, preferably with a thickness of at most 200 pm, 100 pm) or made opaque by an opaque coating, in the lamination interlayer, in particular multi-layer (in particular encapsulated opaque polymer film, slightly set back from the interlayer edge for protection purposes) preferably with a width of at least 10 mm

- an opaque coating (in particular black, absorbent and/or reflective, ink etc.) on a main face of the lamination interlayer, in particular multi-layer, in particular in contact with face F2 or with face Fa (F3) and in particular extending beyond face Fa (F3),

- at least a fraction of opaque thickness of the multi-layer lamination interlayer, in particular an opaque interlayer, in particular black, based on PVB, preferably with plasticizers).

[0045] The peripheral opaque element, the intermediate opaque layer in particular, may be under an upper intermediate layer (clear or tinted) in contact with the face F2.

[0046] In one embodiment, the outer sheet is tinted and/or the lamination interlayer comprises a tinted upper interlayer in contact with the face F2, and a lower interlayer in contact with the face Fa and, between the upper and lower interlayers, an optical isolator layer, the peripheral opaque element (as mentioned above) being bonded to the lower interlayer. [0047] In one embodiment, the peripheral opaque element, in particular the opaque interlayer, preferably has a light transmission which is at most 5%, and preferably at most 2%, at most 1%, or even zero.

[0048] To reinforce the barrier effect, the opaque (absorbent) masking layer and/or the peripheral opaque element (chosen to be absorbent) has an optical density of at least 2, and preferably at least 3, at least 4, at least 5.

[0049] In particular, said masking layer is an opaque enamel coating on the face F2, the inner sheet is an extra-clear glass sheet and/or the lamination interlayer, mono or multi-layer, comprises a PVB interlayer preferably comprising plasticizers in adhesive contact with the face F2.

[0050] The glazing according to the invention may comprise, opposite the masking layer, a first light source (diode strips) which is:

- preferably arranged under the face Fb (F4) and associated with a light redirection element, in particular a reflector light redirection element, in particular a prismatic one, is located on the side of the face Fa (F3) or is transparent (refractive) located on the side of the face Fb (F4), in particular a prismatic one (multiprisms or macroprism, light redirection element for example linked to the face Fb (F4) - optical contact, bonding etc or spaced from the face F4 and linked for example via an optical module to the face F4 -,

- or optically coupled to the second slice (directly or via an optical fiber with lateral extraction for example) or to a hole wall of the inner sheet (perforated, through hole, closed).

Preferably, the glazing according to the invention comprises a second light source (diode strips), in particular first and second longitudinal sources along the longitudinal edges of the glazing (under the face F4 or opposite the second edge).

The glazing according to the invention may further comprise light extraction means linked to the inner sheet, in particular to the face Fa (F3), in particular a diffusing coating on the lamination interlayer (or on the face Fa or even Fb).

[0051] The (each) light source can be removable, added, sold separately or in a kit. The (each) 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. There can be one or more light sources (peripheral, preferably offset from the glass clear), several sets of diodes. The light source(s) can be mono- (emitting in blue, green, red, etc.) or poly-chromatic, or be adapted or combined to produce for example white light. The light source can be extended linearly (rectangular strip such as a strip of diodes) along one side of the glazing (longitudinal edges) or split (with similar or distinct light, for example another color or intensity, controlled independently or simultaneously) along both sides.

[0052] The optical coupling of the light source with the inner sheet forming an optical guide can be carried out as follows:

- by a local light redirection element, by a reflective light redirection element on the face side F3, or by a transparent light redirection element on the face side F4,

- by all or part of the second tranche,

- or by a wall of a hole (through in thickness, closed) of the inner sheet (or several walls of several holes), in particular a hole offset by a clear window, facing the masking layer.

[0053] In the case of light injection through the second edge, the light source is coupled to the edge of the inner sheet, possibly in a peripheral opening notch.

[0054] The light source can be housed in the polymer encapsulation as described in application WO2010/049638, in particular in figure 15 or in figure 16 and even having a recess for removal, replacement of the source.

[0055] In the case of light injection via an internal wall of a hole, the inner sheet, in particular made of mineral glass, comprises at least one peripheral hole (through or even blind in thickness, open on the F4 face side at least) under the masking layer (outside the clear glass) and the light source is coupled to the wall of the inner 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 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.

[0056] The light source is then opposite or offset from the face F4, and in particular in direct optical coupling or via an optic. In particular, the light source and the light redirection element are offset by a clear glass area, facing the masking layer. There may be an optical element (collimation etc.) between the light source and the face F4, in particular an optical element fixed to the face F4. The light source may be fixed to the face F4. The main direction of radiation from the light source may be adjusted.

[0057] The light redirecting reflective element can be glued to the F3 face directly or via at least one glue or held by suction (strong interaction). The prisms reflectors are oriented on the F2 face side or the F3 face side. The prisms may be at least 1 m high and preferably at most 100 pm or 50 pm or 30 pm. Preferably, the redirecting prismatic element is of a width less than the width of the masking layer, preferably at most 10 cm or 5 cm and at least 1 cm and in particular of a length similar to that of the light source, linear (custom-made). It may be a rectangular strip with rounded corners for example. In particular, the light redirecting element is a reflecting prismatic element, comprising reflecting prisms, arranged:

- on the F3 face, in particular in contact with the interlayer in contact with this F3 face, or with a frame interlayer (clear),

- in the lamination interlayer, particularly based on PVB, and in particular on the interlayer in contact with the F3 face.

[0058] The lamination interlayer may be thermoplastic or made of 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®.

[0059] It is possible to have an interlayer in adhesive contact with the face F2, and an interlayer in adhesive contact with the face Fa (F3) and even between these layers an additional interlayer (intermediate).

[0060] An interlayer preferably in contact with the face F2 may be made of anti-UV PVB, for example anti-UV PVB from Eastman, called RU41, for example to protect an electro-active layer (electro-chromic etc.) or any organic coating or ink.

[0061] The lamination interlayer may be acoustic, in particular comprising or consisting of an acoustic PVB (three-layer, four-layer, etc.). Thus, the lamination interlayer may comprise at least one intermediate layer known as the middle layer made of a viscoelastic plastic material with vibro-acoustic damping properties, in particular based on polyvinyl butyral and plasticizer, and further comprise two external intermediate layers made of standard PVB, the middle intermediate layer being between the two external layers. Examples of acoustic PVB are described in patent applications WO2012/025685, WO2013/175101, in particular tinted as in WO2015/079159.

[0062] The interlayer in contact with the face Fa (F3) may be based on PVB and comprise from 70% to 75% by weight of PVB, from 25% to 30% by weight of plasticizer and less than 1% by weight of adjuvants. There are also PVB sheets with few plasticizers. (less than 10% or 5% by weight) or without plasticizer such as the film “MOWITAL LP BF” or “Optical grade thin film” from the company KURARAY.

[0063] The interlayer in contact with the face F2 can be tinted, in particular with a light transmission known as TL of at most 73%, in particular in tinted, gray PVB.

[0064] An additional interlayer (intermediate), between the interlayers in respective contact with the faces F2 (for example to integrate a functional film, an electrically controllable device) and F3 (clear) can be tinted in particular with a TL of at most 73%, or even at least 13%.

[0065] The functional film may be an optical insulating layer (transparent) with a refractive index preferably of at most 1.4, for example a fluoropolymer film, an optical insulating layer which is particularly useful if the interlayer in contact with the face F2 and/or the outer glass sheet is tinted. Another functional element may be provided between the face F2 and the optical insulating layer.

[0066] The lamination interlayer may be multi-layer (with a straight interlayer edge, interlayer layers aligned with each other). The lamination interlayer comprises an upper interlayer in contact with the face F2 and a lower interlayer in contact with the face Fa (F3) and this glazing comprises, between the outer and inner interlayers, in particular above an optical isolator layer, at least one of the functional elements chosen from the group comprising:

- an electro-controllable device, in particular with variable diffusion, in particular based on liquid crystals (PDLC, PNLC, CLC, etc.) or with variable tint, in particular based on electrochromic or even with an optical valve (SPD for suspended particle device in English), a device comprising an electro-active layer between an electro-conductive support on the side of the inner face of the outer glass sheet and an electro-conductive support on the side of the outer face of the inner sheet, (with possibly additional alignment layers)

- a photovoltaic device, in particular with one or more connected photovoltaic cells, in one or more lines,

- a functional film.

[0067] The glazing, in particular the roof, may incorporate one or more functional (non-adhesive) elements, in particular:

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

[0068] For the functional polymer film, it is possible to use, for example, a clear PET film coated with an electrically conductive layer, for example XI R from the Eastman company, or a coextruded PET-PMMA film, for example of the SRF 3M® type.

[0069] Examples of electro-optical functional elements are SPD (“Suspended Particle Device”) functional elements, known for example from EP0876608B1 and WO2011/033313A1, PDLC (“Polymer Dispersed Liquid Crystal”) functional elements, known for example from DE102008026339A1, CLC (“Cholerestic Liquid Crystal”) functional elements, and PNLC (“Polymer Networked Liquid Crystal”) functional elements. There are also electrochromic functional elements known, for example, from EP3702572A1 or EP2917159A1.

[0070] The glazing comprises at least one of the functional elements selected from the group comprising:

- an inner, peripheral opaque layer on the face Fb (F4) of the inner sheet, in particular congruent or of a width less than the width of the masking layer,

- an opaque inner peripheral element located between the inner face Fb and the face F1, capable of masking a light source and a light redirection element,

- an electroconductive coating, in particular reflecting infrared rays such as a silver layer(s) stack, on the F2 face or on an additional film, in particular a polymer film,

- an electroconductive coating, in particular reflecting infrared rays, such as a stack with a layer of transparent conductive oxide, on the Fb (F4) face.

[0071] The glazing may in particular comprise an infrared reflecting or absorbing layer, on face F2 (external glass sheet preferably made of clear or extra-clear glass) 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, 3 or 4 layers), the or each silver layer being arranged between dielectric layers on face F2. The glazing may in particular comprise an infrared reflecting or absorbing layer, on face Fb (F4) in particular a stack of thin layers comprising at least one transparent oxide layer conductor called TCO such as ITO, the or each TCO layer being arranged between dielectric layers.

[0072] As an ITO stack for the F4 face, mention may be made of those described in LIS2015/0146286, on the 4 face in particular in examples 1 to 3. An infrared-reflecting coating is also known in WO2018/206236 and in particular: a dielectric coating comprising dielectric layers such as layers of silicon nitride and/or silicon oxide, a functional layer based on a transparent conductive oxide (TCO) such as a layer based on indium tin oxide (ITO), a dielectric coating comprising dielectric layers such as layers of silicon nitride and silicon oxide.

[0073] The outer glass sheet may be made of mineral glass or may be based on silica, preferably sodium silicate, or even aluminosilicate, or even borosilicate, and preferably has a weight content of total iron oxide (expressed in the form Fe2O3) of at least 0.4% and preferably at most 1.5%. To limit absorption, the inner sheet 5 may be made of mineral glass, in particular based on sodium silicate, or aluminosilicate, or borosilicate, and has a weight content of total iron oxide (expressed in the form Fe2O3) of at most 0.05% (500 ppm), preferably at most 0.03% (300 ppm) and at most 0.015% (150 ppm) and in particular greater than or equal to 0.005%. The redox of the inner glass sheet 5 is preferably greater than or equal to 0.15.

[0074] The inner sheet can also be made of polymer, in particular based on polyurethane (PU), polycarbonate (PC), poly(methyl methacrylate) (PMMA), poly(vinyl chloride) (PVC). The inner sheet can be flexible to follow the curvature of the curved or preformed outer glass sheet.

[0075] The outer glass sheet and even the chosen inner glass sheet can be produced by the “float” process, which makes it possible to obtain a perfectly flat and smooth sheet, or by stretching or rolling processes.

[0076] Examples of glass include float glass of conventional soda-lime composition, possibly hardened or tempered thermally or chemically, an aluminum or sodium borosilicate or any other composition.

[0077] In the present 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°).

[0078] For the glazing and in particular a roof, a light transmission of at most 40% or even at most 28% and even at most 8% in the clear glass and preferably at most 3% or at most 1% in the tinted state with a variable tint device is chosen, for example. [0079] The light extraction means may define at least one first diffusing zone, for example with a width of at least 0.5 mm, in particular a first solid diffusing zone and/or one comprising a set of discontinuous diffusing patterns.

[0080] The glazing may comprise a plurality of diffusing zones of identical or distinct size and/or shape, with any geometric shape (rectangular, square, triangular, circular, oval, etc.), a design, luminous signage (arrow, letter, etc.).

[0081] The means for extracting the light guided in the light guide (inner sheet in particular), are for example in the form of: laser engraving in the inner sheet, texturing (acid etching of the glass, etc.), textured film, coating or diffusing film, preferably transparent, with a binder and diffusing particles, binder (organic, mineral or hybrid) transparent preferably with a refractive index greater than or equal to the index of the inner sheet 5, in particular at least 1.48. The binder may be a transparent ink.

[0082] The light extraction means can be temporary (detachable stickers) and therefore added or replaced, in particular on the face Fb (F4), or permanent, in particular on the face Fa (F3).

[0083] When the light extraction means are a diffusing coating (printed ink) on a PVB interlayer (with or without plasticizers, at least 0.3mm thick or thinner) rather than on the inner sheet, it is easier to change the light extraction pattern and tooling for printing on a flat film than on curved glass. For mechanical strength and especially retaining the pieces of glass, it is also better to have the extraction on PVB than on glass.

[0084] Preferably the diffusing coating and its substrate (inner sheet, interlayer in contact with the face F3) have a light transmission of at least 80% and a blur of at most 30%.

[0085] For example, the binder of the diffusing coating is organic, such as a crosslinked polymer, chosen from polymers based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, or even thermoplastic based on PVB, or even TPU.

[0086] Preferably, when the substrate of the diffusing coating is the inner interlayer, it is chosen to be based on PVB without plasticizer or with at most 15% or 10% or 5% of plasticizers. For example, the thickness of the inner interlayer forming the substrate is at most 200 μm.

[0087] An example of a diffusing coating on a polymer layer, in particular a lamination interlayer and based on PVB, is described by document WO2021/005162. An example of a diffusing coating on a PVB or glass lamination interlayer is described by document WO2023/285743.

[0088] 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 between 100 nm and 700 nm, in particular 400 nm ± 100 nm. Preferably, the diffusing particles are chosen from non-luminescent particles of TiO2, SiO2, CaCO3, ZnO, AI2O3, ZrO2. Preferably, the particles have a refractive index greater than or equal to 1.8 or even 2.

[0089] The present invention also relates to a motor vehicle incorporating the glazing as mentioned above, in particular a roof, a side glazing, in particular a fixed glazing, a fixed glazed door, in particular a roof when it is fixed (canopy or "canopy" in English).

[0090] A road motor vehicle is understood to mean a car, in particular a utility vehicle (pickup truck, van, relay) of less than 3.5 tonnes (light utility vehicle) or a truck or a shuttle, a small public or private transport vehicle. It may be an autonomous or semi-autonomous road vehicle.

[0091] Other characteristics and advantages of the invention will emerge on reading the description which follows, with reference to the appended figures, which illustrate:

[Fig. 1]: a schematic and partial sectional view of an illuminable laminated vehicle glazing 100 in a first embodiment, in particular roof glazing with an overmolded peripheral seal forming encapsulation of the edge of the glazing;

[Fig. 1’]: a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of figure 1, (without the seal);

[Fig. 1”]: a schematic perspective view from below, i.e. from the inside of a vehicle, of the glazing of figure 1, as a variant (without the seal);

[Fig. 2]: a schematic and partial sectional view of an illuminable laminated vehicle glazing 200 in a second embodiment, in particular roof glazing with seal;

[Fig. 2’]: a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of figure 2, (without the seal);

[Fig. 3]: a schematic and partial sectional view of an illuminable laminated vehicle glazing 300 in a third embodiment, in particular roof glazing with a seal;

[Fig. 3']: a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of figure 3; [Fig. 4]: a schematic and partial sectional view of an illuminable laminated vehicle glazing 400 in a fourth embodiment, in particular roof glazing with a seal;

[Fig. 5]: a schematic and partial sectional view of an illuminable laminated vehicle glazing 500 in a fifth embodiment, in particular roof glazing with a seal;

[Fig. 6]: a schematic and partial sectional view of an illuminable laminated vehicle glazing 600 in a sixth embodiment, in particular roof glazing with seal; [Fig. 6’]: a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of figure 6;

[Fig. 7]: a schematic and partial sectional view of an illuminable laminated vehicle glazing 700 in a seventh embodiment, in particular roof glazing with seal;

[Fig. 8]: a schematic and partial sectional view of an illuminable laminated vehicle glazing 800 in an eighth embodiment, in particular roof glazing with seal;

[Fig. 8’]: a schematic and partial sectional view of an illuminable laminated vehicle glazing 800 in a variant of the eighth embodiment, in particular roof glazing with seal.

[Fig. 9]: a schematic sectional view of an illuminable laminated vehicle glazing 900 in a ninth embodiment, in particular roof glazing with encapsulation.

For clarity, identical or similar elements are identified by identical reference signs throughout the figures. The elements shown are not to scale. The terms "exterior" and "interior" will be used in reference to the arrangement of the glazing on a roof opening of a motor vehicle, the exterior designating the volume outside the vehicle, and the interior designating the volume of the passenger compartment. In all the sectional views attached hereto, the exterior is located at the top of the figures, and the interior at the bottom thereof.

[0092] In the following examples, we consider a laminated glazing with two sheets of glass, we will designate by face F1 or 11 the external face of the external glass sheet, by face F2 or 12 the internal face of this external glass sheet, by face F3 or 13 the external face of the internal sheet, and by face F4 or 14 the internal face of this internal sheet.

[0093] Figure 1 is a schematic and partial sectional view of an illuminable laminated vehicle glazing 100 in a first embodiment, in particular glazing of roof with a peripheral seal which is an encapsulation of the edge of the glazing. Figure 1' is a schematic perspective view from below, i.e. from the inside of a vehicle, of the glazing of Figure 1, (without the seal) and Figure 1” an alternative.

[0094] More precisely, it is a laminated glazing 100 illuminable for vehicle, comprising a laminated glazing with a slice 10, 20, 30, quadrilateral with two longitudinal edges (parallel or not) and two lateral edges (front and rear edge in mounted position for a roof, parallel or not), laminated glazing in particular curved comprising:

- an outer glass sheet 1 with a first edge 10, 101 to 104 and a first main face called face F1 11 and a second main face face F2 (12, for example tinted glass)

- a lamination interlayer 3 with a so-called interlayer slice 30, 301 to 304, single or multi-layer, for example based on PVB (with plasticizers for at least one layer),

- an inner transparent sheet 2 with a second slice 20, 201 to 204, an outer main face F3 13 oriented towards the face F2 and an opposite inner main face F4 14, preferably an extra-clear glass sheet (better light guide)

- and a peripheral masking layer 4, 401 to 404, which is a coating here of black enamel on the face F2, having an internal edge 41 between faces F2 and F3 and an external edge 40, 401 to 404.

[0095] The first and second slices 10, 20 are rounded (and polished) on all their edges. In particular, the distance called the rounding distance (taken in the plane of the glazing) between the start of the rounded edge 10' and the end of the rounded edge is at most half the thickness. In particular for the outer sheet (for example at most 2.2 mm thick), the rounding distance is at most 1.5 mm or 1.2 mm. In particular here the rounding can be continuous from one corner to the other of the slice 10 or 20 or with a more or less extended flat part in the middle (see figure 9 extended flat part). Conventionally, the edges of the sheets 1, 2 are rounded by grinding. The rounding can vary, in particular the distance of the rounding can vary depending on the wear of the grinding wheel. Each edge may have a slightly different rounding distance typically with a variation of less than 0.5mm from one edge to the other. In the text any distance (indentation etc) from the second edge is preferably from the extreme point of the rounding of the second rounded edge.

[0096] The external edge 40, is on all its edges called external edges 401 to 404 (see figure T, 1”), a withdrawal r1 of zero or at most 0.2mm from the start of the rounding 10’ of the first edge. r1 can vary from one edge to the other for example by less than 0.2mm.

[0097] The masking layer 4 forms a band of enamel, in particular black, framing the glazing. It is opaque around the entire periphery to hide bodywork elements or joints or to protect an adhesive for mounting on the vehicle. This layer masking layer 4 delimits in particular the window clear by its internal edge 41. The width of the masking layer 4 along the sides or longitudinal edges of a motor vehicle roof is generally less than that at the front or even at the rear. The masking layer 4 is preferably a continuous layer (flat with a solid edge) or alternatively a gradient edge (set of patterns). The optical density of the masking layer is at least 2 and preferably 4 or 5.

[0098] The vehicle roof 100 comprises, under the masking layer 4, one or even two light sources 5, 5' here each longitudinal (along the longitudinal edges more or less parallel), each comprising 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 strip in optical coupling with the inner sheet 2 forming a light guide. The optical coupling of each light source with the inner sheet 2 is here carried out by a local light redirection element, here by a light redirection element 6, (multi)prismatic, reflector on the face side F3, or alternatively by a transparent light redirection element on the face side F4, in particular prismatic (macroprism and/or multiprisms). The prisms may have a height of at least 1 pm and preferably at most 100 pm or 50 pm or 30 pm. Preferably, the prismatic redirecting element is of a width less than the width of the masking layer 4, preferably at least 1 cm and in particular of a length similar to that of the light source, linear (custom-made). It can be a rectangular strip with rounded corners for example.

[0099] In particular, the light redirection element is a reflective prismatic element, comprising reflective prisms, arranged: on the face F3 in particular in contact with the interlayer in contact with this face F3, or with a frame interlayer (clear), in the lamination interlayer 3, in particular based on PVB, and in particular on the interlayer in contact with the face F3.

The reflector prisms can be oriented towards the F2 or F3 face.

[00100] The light source is then opposite or offset from the face F4, and in particular in direct optical coupling or via an optic on the face F4 side, for example, to orient or collimate the beam. The light source can be fixed to the face F4. Such an example of coupling is described in application WO2023/144282. For example, the transparent prismatic film (then on the face F4) 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). For the reflective prismatic film, a metal layer is added. The film prismatic reflector 6 forms a longitudinal strip like the light source. Alternatively, the prismatic film 6 is a monolithic polymer film, for example preformed, and the reflective layer is applied.

[00101] The vehicle roof 100 further comprises light extraction means 7, which are on the F3 face or F4 face, for example in the form of a preferably transparent diffusing coating, with a binder and diffusing particles, a preferably transparent binder (organic, mineral or hybrid) with a refractive index greater than or equal to the index of the inner sheet, in particular at least 1.48. Preferably, the diffusing coating is an ink printed on a PVB-based interlayer, in particular without plasticizer or with at most 20%, 15% or 10% or 5% of plasticizers, and in particular the thickness of the interlayer is at most 200 μm.

[00102] The glazing 100 cooperates with the structure of the roof of the vehicle (not shown in FIG. 1), by means of a peripheral seal 8 making it possible to ensure its watertight connection with this structure. It is a polymeric encapsulation (produced by injection) framing the laminated glazing, preferably of the same color (or close to it) as the masking layer, in particular black.

[00103] More precisely, the seal 8 firstly has an internal wall with a first zone 81 in contact with the second edge 20 and the interlayer edge 30, a second zone 82 in contact with the first edge 10, a third zone 83 in contact with the face F4. The seal 8 also has an external wall having a peripheral lip 80 lip intended to cooperate with the roof opening structure of a vehicle and an upper surface 84 here flush (or sub-flush) with the face F1 11. The triangle 60 symbolizes the bead of glue on the face F4 conventionally centered between 20mm and 25mm (at least 30mm) from the first edge.

[00104] The outer sheet 1 therefore has a rounded edge, the outer edge, for all the outer edges 401 to 404 (figures 1’ and 1”), has a withdrawal r1 of zero or at most 0.2 mm from said start of the rounding 10’ of the first edge.

[00105] Around the entire perimeter of the glazing, the interlayer edge 30, 301 to 304 is aligned with the first edge 10, 101 to 104 (extreme rounded point) extending by a distance r'2 from the external edge 40, 401 to 404, for example at most 1.2 mm.

[00106] On at least three edges 201, 202, 204, the second slice (extreme point of rounding) protrudes by a distance r2 (or d2) from the external slice 401, 402, 404 and remains set back r3 with the first slice 10 (extreme point of rounding) 101, 102, 104. The encapsulation 8 opposite the rounding of the first slice 10 helps to act as a barrier to light. According to the invention, either the last edge 203 is also set back (see figure 1') from the first slice 103 or it is a reference edge 203, for example the front edge of a roof (see figure 1”) aligned with the first slice.

Figure 2 is a schematic and partial sectional view of an illuminable laminated vehicle glazing 200 in a second embodiment, in particular roof glazing with a seal forming encapsulation 8. Figure 2' is a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of Figure 2, (without the seal).

The roof glazing 200 differs from the roof glazing 100 in that on at least 3 edges 201, 202, 204 the second edge 20 (extreme point of rounding) is set back r2 from the external edge 401, 402, 404 for example by at most 1 mm. The encapsulation 8 in particular under the rounding helps to act as a barrier to light.

[00107] And the last edge 203 of the second slice called the reference edge is for example aligned with the edge 103 of the first slice (see figure 2’) for example the front edge of a roof.

[00108] Alternatively, the roof glazing 200 differs from the roof glazing 100 also in that the glazing 200 comprises an absorbing or reflecting layer or infrared (solar control), on face F2 or alternatively 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, 3 or 4 layers of silver), the or each silver layer being arranged between dielectric layers on face F2. Also, cumulatively or alternatively, the glazing comprises an external electroconductive 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) or fluorine-doped tin oxide), on face F4. The TCO layer is arranged between dielectric layers.

Figure 3 is a schematic and partial sectional view of an illuminable laminated vehicle glazing 300 in a third embodiment, in particular roof glazing with the polymeric encapsulation seal 8. Figure 3' is a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of Figure 3. The roof glazing 300 differs from the roof glazing 100 in that the lamination interlayer comprises a peripheral opaque interlayer layer 9, for example a black PVB of almost zero TL with an internal edge 91 under the masking layer and an external edge 90 still aligned with the first edge 10. This is an additional precaution against light leaks. According to the invention, either the last edge 203 is also set back from the first slice 103 (see figure 3') or it is a reference edge 203, for example the front edge of a roof aligned with the first slice.

Figure 4 is a schematic and partial sectional view of an illuminable laminated vehicle glazing 400 in a fourth embodiment, in particular roof glazing with encapsulation seal 8.

The roof glazing 400 differs from the roof glazing 100 in that the interlayer edge 30 is slightly set back from the outer edge 40, for example by at most 5 mm (around the entire perimeter). In practice, the interlayer edge 30 could be aligned with the outer edge. The relative position of the interlayer edge 30 with the outer edge may vary from one outer edge to the other.

According to the invention, either the last edge 203 is also set back from the first slice 103 or it is a reference edge, for example the front edge of a roof aligned with the first slice.

Figure 5 is a schematic and partial sectional view of an illuminable laminated vehicle glazing 500 in a fifth embodiment, in particular roof glazing with encapsulation seal 8.

The 500 roof glazing differs from the previous 400 roof glazing by a greater shrinkage of the second slice which can help with the evacuation of bubbles.

According to the invention, either the last edge 203 (front edge of a roof) is also set back from the edge 103 or it is a reference edge, for example the front edge of a roof.

Figure 6 is a schematic and partial sectional view of an illuminable laminated vehicle glazing 600 in a sixth embodiment, in particular roof glazing with an 8' glued seal.

The roof glazing 600 differs from the roof glazing 100 by the profiled 8' seal which cooperates with the structure of the roof of the vehicle 70, ensuring the watertight connection with this structure by its compression.

[00109] This profiled peripheral seal framing the laminated glazing can be made of a flexible polymer material, in particular thermoplastic, single-hardness, opaque (absorbent and/or reflective), such as PVC or TPE, in a polyurethane, in a synthetic rubber of the EPDM type, or in any other suitable material. This seal can be made by extrusion or injection, and can be bonded in particular by an adhesive 85 (double-sided, woven adhesive, mechanically reinforced, etc., preferably without creep) on the face F4 14. Preferably, the thickness of the seal does not vary by more than 30% or even 20% (for mechanical strength). The seal is preferably the same color (or close to it) as the masking layer, particularly black.

[00110] More precisely, the profiled joint 8 firstly has an internal wall 81, 82, 83 (smooth, bare, possibly reflective) with:

- a support surface 82 in contact with the first slice 10, (end point or any other point of the rounding)

- a fixing surface 83 glued by the adhesive 85 to the face F4, preferably over a fixing width of at least 4mm and even 6mm and preferably at most 12mm

- a lateral surface 81 facing the edge of the glazing under the face F2, in particular with a lateral zone facing the second edge and another lateral zone facing the interlayer edge, the lateral surface may be slightly downstream of the fixing surface.

[00111] The profile 8' also has an external wall having a free internal surface 86 on the passenger compartment side, a peripheral lip 80 lip intended to cooperate with the roof opening structure of a vehicle and an upper surface 84 here flush (or sub-flush) with the face F1 11. The peripheral lip 80 ensures the return of the bearing surface 82 of the seal against the first edge 10 (as indicated by the arrow F in the other examples with the structure).

For simplicity, the interlayer slice 30, 301 to 304 is aligned with the first slice 10, 101 to 104 around the entire circumference.

[00112] On at least three edges 201, 202, 204, the second slice (extreme point of rounding) is aligned with the external slice 40 and remains set back r3 with the first slice 10 (extreme point of rounding) 101, 102, 104.

According to the invention, either the last edge 203 is also set back from the first slice 103 or it is a reference edge 203 (see figure 6') for example the front edge of a roof aligned with the first slice.

Figure 7 is a schematic and partial sectional view of an illuminable laminated vehicle glazing 700 in a seventh embodiment, in particular roof glazing with glued attached seal 8'.

The roof glazing 700 differs from the previous roof glazing 600 in that the interlayer slice 30 (under the entire perimeter) and the second slice 20 (on at least 3 edges) are set back from the external slice, for example by at most 15mm or 10mm and/or by at least 5mm or 3mm. The protruding part of the masking layer serves to block certain rays. According to the invention, either the last edge is also set back from the first slice or it is a reference edge, for example the front edge of a roof aligned with the first slice.

Figure 8 is a schematic and partial sectional view of an illuminable laminated vehicle glazing 800 in an eighth embodiment, in particular roof glazing with glued attached seal 8'.

The 800 roof glazing differs from the previous 700 roof glazing by a peripheral opaque interlayer 9 such as a black PVB.

Figure 8’ is a schematic and partial sectional view of an illuminable laminated vehicle glazing 800 in a variant of the eighth embodiment, in particular roof glazing with glued added seal 8’.

The 800’ roof glazing differs from the previous 800 roof glazing by another peripheral opaque element 9, namely black ink on a main face of the interlayer (side F3 or F2 or even within a multi-layer interlayer).

Figure 9 is a schematic sectional view of an illuminable laminated vehicle glazing 900 in a ninth embodiment, in particular roof glazing for example encapsulated or alternatively with a glued attached profiled seal.

This 900 glazing, preferably rectangular and curved in one or more directions, comprises, from the outside to the inside:

- an outer glass sheet 1 which can be a 2.1 mm Planiclear glass with an IR 15 reflective coating (silver stacking), the whole having a TL 71.8% (91% without the reflective coating),

- an inner transparent sheet 2, preferably made of mineral glass, here of the same shape and dimensions as the sheet 1, forming internal glazing, on the passenger compartment side, (for example a sheet of sodium-calcium silico glass, extra clear such as the Diamant glass marketed by the company Saint-Gobain Glass with a TL of at least 91%, with a thickness equal for example to 2.9 mm, glass with a refractive index n1 of the order of 1.52 at 600 nm or Optiwhite glass of 1.95 mm, or Sunmax glass of 2.05 mm), with here a base layer emissivity 16 based on ITO on the F4 face

- between face F2 and face F3, a transparent lamination interlayer 3, comprising here:

- an inner interlayer 31 of PVB (with plasticizers, at least 30% by weight), clear (as transparent as possible and with as few optical defects as possible), of 0.38mm or 0.76mm (in one or two sheets) in adhesive contact with the F3 face, with a refractive index n3 of approximately 1.48 at 600nm, for example PVB of TL at 99.9%.

- an intermediate interlayer 33, in particular thermoplastic, here based on PVB (with plasticizers, at least 30% by weight), of 0.38mm or 0.76mm (in one or two sheets) clear or alternatively tinted, for example gray tinted with TL at 27%,

- an outer interlayer 33, in particular thermoplastic, here based on PVB (with plasticizers, at least 30% by weight), of 0.38mm or 0.76mm (in one or two sheets) in adhesive contact with the face F2, clear or alternatively tinted, for example gray tinted with TL at 27%.

[00113] Alternatively, the inner interlayer 31 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 μm. Alternatively, the inner interlayer 31 is based on crosslinked polymer adhesive material, in particular adhesive polyacrylate film [00114] The glazing 900 comprises the enamel masking layer 4 forming a masking frame delimiting a window clear 41 (daylight) here rectangular.

[00115] To optically isolate an inner part (with light guide and light extraction) and the tinted, absorbent outer part, the glazing 900 further comprises an optical isolating element 92 with a refractive index lower than the refractive index of the PVB 31 (and of the glass 2) such as a fluoropolymer film, sandwiched between the outer interlayer 33 and the intermediate interlayer 32. It extends throughout the clear glass and beyond, its edge being under the masking layer 4. The film 92 here has a thickness of less than 200 pm or even at most 100 pm and is protected at the periphery by one or both of the outer and intermediate interlayers (in particular creep during lamination). The interface between the two interlayers 31, 32 may be indistinguishable.

[00116] The electrically controllable device, here with variable diffusion 93 between the outer interlayer 33 and the intermediate interlayer 32 preferably tinted, gray, in particular in PVB. The thickness of the device 93 being for example 0.4 mm, an interlayer frame layer 34 with a thickness of 0.38 mm, in PVB, clear or tinted, is added. The edges of the device 93 are under the mask layer 2. For example, the blur in the diffusing state of the roof with the device 93 is at least 80%. The variable diffusion device 93 comprises:

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

- an electro-active layer, based on liquid crystals in a polymer matrix (for example PDLC in English), - a second support (PET of 125pm for example) with a second electroconductive coating (for example ITO) on the side of the F3 face.

[00117] The electrically conductive coatings at the periphery are not covered by the electroactive layer and current inlets in the form of strips are provided for the electrical supply. For the purpose of protecting the electroactive layer, a chemical protection means can be provided (barrier to possible plasticizers in the PVB) for example by glued or contacting PET polymer strips.

[00118] Alternatively, the variable diffusion device is replaced by an electrochromic device or by a functional PET film (tinted, etc.) or by a photovoltaic device.

[00119] For the illumination function, the following are provided, masked from the outside by the masking layer 5:

- light-emitting diodes 5 (here with front emission) on a support (for example PCB) opposite (or offset from) the face F4,

- on the F3 side, a light redirection element 6, local, peripheral like a prismatic reflector film 6.

[00120] The reflective prismatic film 6 is here under the optical isolator 92. As a precaution to avoid stray light passing through the film and even the masking layer 4, an internal opaque element is optionally added to the right of the prismatic film 6 (of the same width and not exceeding the internal edge of the film 92), here an opaque ink (black) or even a glued black PET film. Alternatively, a transparent prismatic film is chosen on the face side F4, downstream of the diodes.

[00121] It is preferred to double the illumination means by adding another light source on its support, another reflective prismatic film along the other longitudinal edge of the glazing 900. In particular, it is possible to have on each side a set of diode strips on separate supports or connected to them. It is also possible to place them on the front or rear edges. The light extraction means 7 are, for example, here extended or punctual geometric patterns.

[00122] For this glazing 900, for example, an encapsulation 8 or a glued profile can be chosen, such as those presented for the previous examples. In particular, the lower layer 31 is an opaque PVB at the periphery or the latter 31 is coated with an opaque black ink at the periphery.

[00123] As will be understood in light of the above, the present invention provides an effective solution for substantially reducing or eliminating light leaks at the periphery of an illuminated glazing unit connected to a structure by a peripheral polymeric encapsulation. [00124] Naturally, the invention is described in the above by way of example. It is understood that those skilled in the art are able to carry out different variant embodiments of the invention without departing from the scope of the invention.

Claims

1. Illuminatable laminated glazing for vehicles (100 to 900), comprising laminated glazing with a slice (10, 20, 30), laminated glazing comprising an outer glass sheet (1) with a first slice (10, 101 to 104) and a first main face called face F1 (11) and a second main face called face F2 (12), an inner transparent sheet (2) with a second slice (20, 201 to 204), an outer main face called Fa (13) oriented towards the face F2 and an opposite inner main face called Fb (14), a lamination interlayer (3) between the face F2 and the face Fa with a so-called interlayer slice (30, 301 to 304), and a peripheral masking layer (4, 401 to 404) which is a coating on the face F2, having an inner slice (41) between faces F2 and Fa and an outer slice (40, 401 to 404) with outer edges (401 to 404), characterized in that the outer sheet has a rounded edge, and the outer slice (40) has for all the outer edges (401 to 404), a withdrawal r1 of zero or at most 0.2 mm from said start of the rounding of the first slice, and in that the glazing comprises a peripheral seal (8), opaque, which is a profile or a polymeric encapsulation, of the edge of the glazing, framing the laminated glazing. 2. Illuminatable laminated glazing for a vehicle according to claim 1, characterized in that for all the external edges (401 to 404), the shrinkage r1 is zero. 3. Illuminable laminated glazing for a vehicle according to one of the preceding claims, characterized in that in 2 or 3 external edge zones, the second edge (20) is set back r3 from the first edge and in at least one external edge zone (403), an edge, called a reference edge (203), preferably the front edge of a roof, of the second edge is aligned with the first edge. 4. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that in 1, 2 or 3 or 4 external edge zones, the interlayer edge (30) extends beyond the external edge, and even preferably is aligned with the first edge. 5. Illuminable laminated glazing for a vehicle according to one of the preceding claims, characterized in that the interlayer edge (30) extends beyond the outer edge and is preferably aligned with the first edge, the second edge is between the outer edge and the first edge and a peripheral opaque element (9) is between the outer edge and the first edge and is linked to the lamination interlayer. 6. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that the interlayer edge (30) extends beyond the external edge and is even preferably aligned with the first edge, the second edge being set back preferably no more than 5mm or 3mm from the outer edge or aligned with the outer edge. 7. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that the distance between the start of the rounded edge and the end of the rounded edge of the first slice is at most half the thickness of the outer sheet, in particular at most 1.5 mm or 1.2 mm. 8. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that the interlayer edge is set back from the external edge and the polymeric encapsulation is preferably set back by at most 5 mm or 3 mm from the external edge, optionally the second edge is set back or aligned with the interlayer edge preferably by at most 5 mm. 9. Illuminatable laminated glazing for a vehicle according to one of claims 1 to 7, characterized in that the profiled seal has an internal wall with a support surface in contact with the first edge and a fixing surface bonded by an adhesive to a fourth face F4 (14), in particular the face Fb. 10. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that in 1, 2, 3 or 4 external edge zones, the second edge protrudes from the external edge, in particular set back from the first edge, and a peripheral opaque element (9) linked to the interlayer extends beyond the external edge and with an external edge (90) preferably as far as the first edge. 11. Illuminatable laminated glazing for a vehicle according to the preceding claim, characterized in that the peripheral opaque element (9) is: - a film, in particular polymer, opaque in mass or made opaque by an opaque coating, in the lamination interlayer (3) - or an opaque coating on a main face of the lamination interlayer, in particular in contact with face F2 or with face Fa, - or at least a fraction of the opaque thickness of the lamination interlayer, in particular an opaque interlayer. 12. Illuminatable laminated glazing for a vehicle according to the preceding claim, characterized in that the outer sheet is tinted and/or the lamination interlayer (3) comprises a tinted upper interlayer in contact with the face F2, and a lower interlayer in contact with the face Fa and an optical isolating layer (92) is between the upper and lower interlayers, the peripheral opaque element (9') being bonded to the lower interlayer. 13. Illuminatable laminated glazing for a vehicle according to any one of the preceding claims, characterized in that the masking layer (4) and/or an opaque element possible peripheral (9) has an optical density of at least 2, and preferably at least 3, at least 4, at least 5. 14. Illuminable laminated glazing for a vehicle according to any one of the preceding claims, characterized in that it comprises, opposite the masking layer (40), a first light source (5) arranged under the face Fb (14), and associated with a light redirection element (6), which is preferably: reflective, in particular prismatic, located on the side of the face Fa or is transparent located on the side of the face Fb and in that it comprises light extraction means (7) linked to the inner sheet, in particular to the face Fa (13), in particular a diffusing coating on the face Fa or on the lamination interlayer. 15. Illuminable laminated glazing for a vehicle according to any one of the preceding claims, characterized in that the lamination interlayer (3) comprises an upper interlayer in contact with the face F2 and a lower interlayer in contact with the face Fa and in that it comprises, between the upper and lower interlayers, in particular above an optical isolator layer (92), at least one of the functional elements chosen from the group comprising: - an electrically controllable device (93), in particular with variable diffusion and/or variable tint, comprising an electroactive layer between an electroconductive support on the side of the second face F2 and an electroconductive support on the side of the face Fa: - a photovoltaic device - a functional film. 16. Motor vehicle comprising a roof, side glazing, in particular fixed glazing, a fixed glazed door, which is an illuminable laminated glazing in accordance with any one of the preceding claims.