Illuminatable laminated vehicle glass

Abstract

The invention relates to an illuminable vehicle glazing (100), 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 external edges, has a setback r1 of zero or at most 0.2 mm from said start of the rounding of the first edge, and it includes an opaque peripheral seal (8), which is a profile or a polymer encapsulation of the glazing edge, framing the laminated glazing. (Fig. 1)

Description

Title of the invention: Illuminatable laminated vehicle glazing

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

[0002] Illuminatable sunroofs are known, consisting of laminated glass panes equipped with one or more light sources optically coupled to the inner pane. These light sources are masked externally by a black enamel masking layer on one main face of the inner glass pane. A light-extraction layer on the inner glass pane forms, for example, patterns. These patterns are illuminated by the extraction of guided light within the inner glass pane, providing a highly aesthetic visual effect, particularly at night and when viewed from inside the passenger compartment.

[0003] Unfortunately, a peripheral light band visible from outside the vehicle could be observed on these illuminated roofs.

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

[0005] To this end, the present invention proposes an illuminable laminated glazing for vehicles, comprising a laminated (curved) glazing with an edge, laminated glazing having an outer sheet of glass with a first edge (in particular bare, i.e. without a layer, coating and / or adhesive, edge possibly polished, flat, rounded) and a first main face called face Fl and a second main face called face F2, an inner transparent sheet (preferably extra-clear glass) with a second edge (in particular bare, i.e. without a layer, coating and / or adhesive, edge possibly polished, flat or 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 opposing 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 interlayer edge, and a peripheral masking layer which is a coating (printed, in particular screen-printed) on face F2, having an inner edge between faces F2 and Fa and an outer edge.

[0006] The outer (and even inner) sheet has a rounded edge; the outer edge, on all external edges, has a zero or at most 0.2mm inset from the beginning of the rounding of the first edge.

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

[0008] For reasons of manufacturing process of a laminated glazing of the prior art such as a roof, the enamel coating is recessed rl by a few mm, the second layer is, on several edges, offset from the first layer, classically up to 1mm.

[0009] The Applicant has identified that this results in a path for light coming out of 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 recess of width rl or even in the area of ​​the rounding.

[0010] Illuminated glazing of the prior art therefore gives rise to light leaks at its periphery instead of remaining guided and extracted and being visible only inside the glazing, thus generating the light strip visible from outside the vehicle.

[0011] The near-zero or zero shrinkage rl allows the masking layer to be used as a barrier against light rays that might escape at the periphery of the glazing, in cooperation with a peripheral seal placed on the edge of this glazing. The shrinkage rl 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 rounded (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 to the thickness of the glazing: the seal thus obtained perfectly conforms to 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 exposed, and the seal preferably extends along face Fb (F4) under the periphery of the inner face of the inner pane of glass. The adhesion promoter (or primer) used in the encapsulation process, being generally black, can help to mask light leakage by covering the edge of the glazing, particularly on the second and first layers.

[0015] In a configuration with a 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 joint also blocks light from the rounded (ground) edge, leaving only a small amount of light leaking outwards. This small amount of light that can escape towards The exterior may be considered acceptable in some cases. Otherwise, an opaque peripheral element is used, linked to the laminated interlayer between the beginning 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, polyurethane (PU), rubber, EPDM, PP-EPDM, synthetic rubber of the EPDM type, or any other suitable material. The seal is preferably black (same color as the masking layer).

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

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

[0020] Thanks to the invention, before any encapsulation, the second layer can be bare (simply shaped, in particular rounded and even polished); it is not necessary to cover it with an opaque reflective or light-absorbing layer (paint, double-sided reflective tape, etc.), which is a tedious and complex operation on an industrial scale. However, an opaque encapsulation primer (black, with carbon black, etc.) can be used, which also contributes to the barrier but is not sufficient on its own.

[0021] The encapsulation has an inner wall in contact with the edge of the glazing and with face Fb (F4). The encapsulation has an outer wall having a lip, an external, free surface oriented towards the passenger compartment, for example, flush with or projecting from face FL. The encapsulation can be made of polyurethane, in particular PU-rim (reaction-in-mold). Other encapsulation materials are: - preferably flexible thermoplastics: thermoplastic elastomer (TPE), chlorinated polyvinyl (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] Regarding the possible peripheral opaque element, it is preferable that it be linked by the interlayer rather than a deposit on the face F2 etc., thus avoiding the application of an opaque solution (paste) on and / or the second layer, which can overflow, and lengthens the manufacturing time, which is not very compatible with industrial requirements.

[0023] From a manufacturing process perspective, it is easy to align the interlayer slice with the first slice. For example, the interlayer that may have flowed beyond the first slice after lamination is deburred (brushed, abraded). In the case of an interlayer slice that is recessed from the first slice, the cutting level of the interlayer can be chosen to account for any potential thinning.

[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 rl is zero and even the glazing is devoid of 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 withdrawal of the inner sheet can be limited in order to maintain the structure's attachment with a bead of glue preferably of no more than 40mm or 30mm, in particular between 20mm and 30mm (bead 1cm to 1.5cm wide, 5mm thick) of the first slice.

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

[0029] The masking layer can be a band, notably black, framing the glazing. Opaque material is applied around the entire perimeter to conceal bodywork elements or seals, or to protect adhesive for mounting on the vehicle. This internal masking layer delimits, in particular, the clear glass area. The width of the masking layer along the sides of a motor vehicle roof is generally less than that at the front or even the rear. The width of the masking layer along the longitudinal edges can be up to 60 cm, specifically from 20 cm to 40 cm, as per custom specifications. The masking layer is preferably a continuous layer (flat with a solid edge) or, alternatively, an inner edge with a gradient (set of patterns).

[0030] For manufacturing reasons related to laminated glass, it is sometimes necessary for an edge of the second layer to be aligned with an edge of the first layer (reference edge, achieved by butting the inner and outer sheets together). For example, this is not an edge with an area of ​​optical coupling of the inner sheet (with a light source).

[0031] In an embodiment (with a profiled joint or encapsulation), in two or preferably three external edge zones, the second slice is set back r3 from the first slice (by a maximum of 1 mm) or even aligned with or set back from the external slice (by a value of r2), and in at least one external edge zone, a reference edge, preferably the leading edge of a roof, of the second slice is aligned with the first slice. The spacer slice can be aligned with the first slice in all external edge zones. The glazing may optionally be free of a peripheral opaque element connected to the spacer.

[0032] In an embodiment (with a profiled joint or encapsulation), in 1, 2, 3, or 4 external edge zones (preferably all external edge zones), the interlayer edge extends beyond the external edge (into the rounded area), and preferably is even aligned with the first edge. The glazing may optionally lack a peripheral opaque element connected to the interlayer.

[0033] In an embodiment (with encapsulation joint), in 1, 2, 3, or 4 external edge zones (preferably all external edge zones):

[0034] - the interleaf edge is recessed from the outer edge

[0035] - and the polymeric encapsulation is recessed, preferably by no more than 5mm or 3mm, of the outer slice, possibly the second slice is recessed or aligned with the interlayer slice.

[0036] In an encapsulated configuration, when face Fa (F3) and / or the rounded edge of the second slice protrudes beyond the outer slice and the interlayer slice is recessed from the first slice, there is a risk that one or more bubbles may be present in the encapsulating material and could create a light bridge between the inner and outer glass sheets, in the absence of the peripheral opaque element in the rounded area. Therefore, in the possible absence of the peripheral opaque element, it is preferable, when the interlayer slice is recessed from the second slice, particularly when aligned or recessed R from the outer slice (for example, by a maximum of 5 mm, 3 mm, 2 mm, or 1 mm), that the second slice be aligned or recessed from the outer slice, for example, by a maximum of 5 mm or 3 mm. It is particularly preferable that the second slice be recessed from the first slice. of interlayer, in particular of no more than 5mm or 3mm. This promotes the evacuation of bubbles.

[0037] In an embodiment (with profiled joint or encapsulation), in 1, 2, 3, or 4 external edge zones (preferably all external edge zones):

[0038] - the interlayer slice extends beyond the outer slice (into the area rounding), and preferably is aligned with the first slice.

[0039] - the second slice is between the outer slice and the first slice (in particular set back from the first layer (for example, by no more than 1 mm), and a peripheral opaque element bonded to the lamination interlayer is between the outer layer and the first layer. In particular, the outer edge of this peripheral opaque element extends beyond the second layer (and is aligned with the first layer).

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

[0041] - the interlayer slice extends beyond the outer slice (into the area rounding), and preferably is aligned with the first slice.

[0042] - the second slice preferably recessed by no more than 5mm or 3mm from the slice external or aligned with the external edge

[0043] - the glazing is optionally 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 outer slice and the first slice (in particular aligned with), the outer slice of this peripheral opaque element protrudes from the second slice (and is even aligned with the first slice).

[0044] In an embodiment (with profiled joint or encapsulation), in 1, 2, 3, or 4 external edge zones (preferably all external edge zones):

[0045] - the second tranche protrudes from the outer tranche, notably set back from the first tranche,

[0046] -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.

[0047] The optional peripheral opaque element may be continuous, or in pieces, butted on several closely spaced external edges, at the corners etc. The peripheral opaque element preferably forms a frame.

[0048] The peripheral opaque element may be: • a film, in particular a polymer, opaque throughout (polyester, polyethylene terephthalate, black, preferably with a thickness of no more than 200 µm, 100 µm) or opacified by an opaque coating, in the laminate interlayer, in particular a multilayer (especially an encapsulated opaque polymer film, in (slight indentation of the interleaf edge for protection) preferably with a width of at least 10mm • an opaque coating (in particular black, absorbent and / or reflective, ink etc.) on a main face of the laminate interlayer, in particular multilayer, 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 the opaque thickness of the multilayer laminate interlayer, in particular an opaque interlayer, especially black, preferably PVB-based with plasticizers).

[0049] The peripheral opaque element, in particular the intercalated opaque layer, may be under an upper intercalated layer (clear or tinted) in contact with the face F2.

[0050] In one embodiment, the outer sheet is tinted and / or the lamination interlayer comprises a tinted upper interlayer in contact with face F2, and a lower interlayer in contact with face Fa and, between the upper and lower interlayers, an optical insulating layer, the peripheral opaque element (as mentioned above) being bonded to the lower interlayer.

[0051] In one embodiment, the peripheral opaque element, in particular the opaque interlayer layer, preferably has a light transmission of at most 5%, and preferably at most 2%, at most 1%, or even zero.

[0052] To enhance 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.

[0053] In particular, said masking layer is an opaque enamel coating on face F2, the inner sheet is an extra-clear glass sheet and / or the lamination interlayer, single or multilayer, comprises a PVB interlayer preferably comprising plasticizers in adhesive contact with face F2.

[0054] The glazing according to the invention may include, opposite the masking layer, a first light source (diode strips) which is:

[0055] - arranged under face Fb (F4) and associated with a light redirection element, in particular a light redirection element reflector, in particular prismatic, is located on the side of face Fa (F3) or a transparent one is located on the side of face Fb (F4).

[0056] - or optically coupled to the second slice (directly or via a fiber optical with lateral extraction for example) or to a hole wall of the inner sheet (perforated, through hole, closed).

[0057] 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 face F4 or opposite the second tranche). It includes means of light extraction linked to the inner sheet, in particular to the Fa face (F2).

[0058] Each light source can be removable, added, sold separately, or as a kit. Each light source is preferably an array of light-emitting diodes (on a printed circuit board such as a PCB, for example, flexible), in particular a straight or curved strip. There may be one or more light sources (peripheral, preferably offset from the glass), and several arrays of diodes. The light source(s) may be monochromatic (emitting in blue, green, red, etc.) or polychromatic, or be adapted or combined to produce, for example, white light. The light source may be extended linearly (as a rectangular strip such as an array of diodes) along one side of the glazing (longitudinal edges) or split (with similar or distinct light, for example, a different color or intensity, controlled independently or simultaneously) along both sides.

[0059] The optical coupling of the light source with the inner sheet forming the optical guide can be achieved as follows:

[0060] - by a local light redirection element, by a redirection element of light reflector on the front side F3, or by a transparent light redirection element on the front side F4,

[0061] - by all or part of the second tranche,

[0062] - or by a wall of a hole (through thickness, closed) in the inner sheet (or several walls of several holes), including a hole offset by a pane of glass, facing the masking layer.

[0063] In the case of light injection through the second slice, the light source is coupled to the slice of the inner sheet possibly in a through-peripheral notch.

[0064] 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.

[0065] In the case of light injection via an internal wall of a hole, the inner sheet, particularly one made of mineral glass, has at least one peripheral hole (through or even blind in thickness, open at least on the F4 face side) under the masking layer (outside the clear glass area), and the light source is coupled to the wall of the inner sheet delimiting the hole, preferably housed within the hole. The light source, particularly diodes, may be located within the hole, may be combined with an optical element between the injection wall and the light source in the hole, or inside the housing. Examples of embodiments described in patents WO2018 / 178591 and WO2013 / 110885 can be cited.

[0066] The light source is then positioned opposite or offset from face F4, particularly in direct optical coupling or via an optical system. Specifically, the light source and the light redirection element are offset by a pane of glass, facing the masking layer. An optical element (collimation element, etc.) may be placed between the light source and face F4, in particular an optical element fixed to face F4. The light source may be fixed to face F4. The principal direction of the light source's radiation can be adjusted.

[0067] The light redirection reflector element can be glued to face F3 directly or via at least one adhesive or held by suction (strong interaction). The reflector prisms are oriented towards face F2 or face F3. The prisms can be at least 1 pm high and preferably no more than 100 pm, 50 pm, or 30 pm. Preferably, the redirector prismatic element is narrower than the width of the masking layer, preferably no more than 10 cm or 5 cm and at least 1 cm, and in particular has a length similar to that of the linear (custom-made) light source. It can be a rectangular strip with rounded corners, for example. In particular, the light redirection element is a reflector prismatic element, comprising reflector prisms, arranged as follows:

[0068] - on face F3, in particular in contact with the intercalated layer in contact with this F3 face, or with an interlayer frame (light),

[0069] - in the laminate interlayer, particularly one based on PVB, and in particular on the intercalary layer in contact with face F3.

[0070] The lamination interlayer may be thermoplastic or made of a cross-linked adhesive material, preferably selected from polymers based on: poly(vinyl butyral), also known as PVB, or ethylene-vinyl acetate copolymer, also known as EVA (thermoplastic or cross-linked), thermoplastic polyurethane (TPU), or ionomer. An example of a monomer resin is marketed by Kuraray under the registered trademark SentryGlas®.

[0071] We can have an intercalated layer in adhesive contact with the face F2, and an intercalated layer in adhesive contact with the face Fa (F3) and even between these layers an additional intercalated (intermediate) layer.

[0072] An interlayer preferably in contact with face F2 can be made of anti-UV PVB, for example Eastman anti-UV PVB, designated RU41, for example to protect an electro-active layer (electro-chrome etc.) or any organic coating or ink.

[0073] The lamination interlayer may be acoustic, in particular comprising or being made of acoustic PVB (three-layer, four-layer, etc.). Thus, the lamination interlayer may comprise at least one intermediate layer, referred to as a middle layer, made of viscoelastic plastic material with vibro-acoustic damping properties. particularly based on polyvinyl butyral and a plasticizer, and further comprising two outer interlayers of standard PVB, the middle interlayer being between the two outer layers. Examples of acoustic PVB are described in patent applications WO2012 / 025685 and WO2013 / 175101, including tinted versions as in WO2015 / 079159.

[0074] The interlayer in contact with face Fa (F3) can be PVB-based and comprise 70% to 75% by weight of PVB, 25% to 30% by weight of plasticizer, and less than 1% by weight of additives. There are also PVB sheets with low plasticizer content (less than 10% or 5% by weight) or without plasticizer, such as the "MOWITAL LP BF" film from KURARAY.

[0075] The interlayer in contact with face F2 can be tinted in particular with a light transmission known as TL of at most 73%, in particular in tinted PVB, grey.

[0076] An additional (intermediate) layer, between the interlayers in respective contact with the F2 (for example to integrate a functional film, an electrically controllable device) and F3 (clear) faces can be tinted in particular with TL of at most 73%, or even of at least 13%.

[0077] The functional film may be an optical insulating layer (transparent) with a refractive index preferably of no more than 1.4, for example a fluoropolymer film. This optical insulating layer is particularly useful if the interlayer in contact with face F2 and / or the outer glass sheet is tinted. Another functional element may be located between face F2 and the optical insulating layer.

[0078] The lamination interlayer may be multilayered (with a straight interlayer edge, interlayer layers aligned with each other). The lamination interlayer comprises an upper interlayer in contact with face F2 and a lower interlayer in contact with face Fa (F3), and this glazing comprises, between the outer and inner interlayer layers, particularly above an optical insulating layer, at least one of the functional elements selected from the group comprising:

[0079] - an electrically controllable device, in particular with variable diffusion, in particular with liquid crystal based (PDLC, PNLC, CLC, etc.) or variable color, particularly electrochromic or optical valve based (SPD for suspended particle device), a device comprising an electro-active layer between an electro-conductive support on the inner face of the outer glass sheet and an electro-conductive support on the outer face of the inner sheet, (possibly with additional alignment layers)

[0080] - a photovoltaic device, in particular with one or more cells connected photovoltaic systems, in one or more lines,

[0081] - a functional film.

[0082] The glazing, particularly the roof glazing, may incorporate one or more functional (non-adhesive) elements, in particular:

[0083] - an electronic device (more or less extensive) chosen from at least one of the The following devices: sensors, electrically controlled devices with variable tint and / or diffusion, additional diodes (emitting towards the outer pane of glass or towards the inner pane), in particular local or extending over almost the entire glazing, in particular opposite or offset from the propagation zone, other means of light extraction,

[0084] - a functional polymer film, for example an infrared-reflective film (solar control, silver stacking, replacing a layer on face F2), and / or heating for example polymer substrate with an electro-conductive coating (transparent), in particular of thickness of no more than 0.4mm or 0.2mm, in particular local or preferably extending over almost all of the glazing (and over all the clear glass), with the electro-conductive coating on face F2 or face F3.

[0085] For the functional polymer film, one can use, for example, a clear PET film coated with an electro-conductive layer, for example XIR from the Eastman company, a PET-PMMA co-extruded film, for example of the SRF 3M® type.

[0086] 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, and PNLC (Polymer Networked Liquid Crystal) functional elements. There are also known electro-chromic functional elements, for example from EP3702572A1 or EP2917159A1.

[0087] The glazing comprises at least one of the functional elements selected from the group comprising:

[0088] - an opaque inner, peripheral layer on the Fb (F4) face of the sheet interior, in particular congruent with or narrower than the width of the masking layer,

[0089] - an opaque inner peripheral element located between the inner face Fb and the face Fl, capable of masking a light source and a light redirection element,

[0090] - an electroconductive coating, in particular reflecting infrared such that a stack of silver layer(s), on the F2 face or on an additional film, particularly a polymer,

[0091] - an electroconductive coating, in particular infrared reflective, such than a stack with a transparent conductive oxide layer, on the Fb (F4) face.

[0092] The glazing may in particular include a reflective or infrared-absorbing layer, on face F2 or on a transparent polymer film (PET etc.) between two interlayers, in particular a stack of thin films comprising at least one metallic layer such as silver (and even 2, 3 or 4 layers), the silver layer or each layer being arranged between dielectric layers on face F2 or at 1TTO for face F4.

[0093] Examples of 1TTO stacking for face F4 include those described in US2015 / 0146286, particularly on face 4 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 silicon nitride and / or silicon oxide layers, a functional layer based on a transparent conductive oxide (TCO) such as an indium tin oxide (ITO) layer, a dielectric coating comprising dielectric layers such as silicon nitride and silicon oxide layers.

[0094] The outer glass sheet may be made of mineral glass, preferably silica-based, preferably calcium silicate, or even aluminosilicate, or borosilicate, and preferably has a total iron oxide content (expressed as Fe2O3) by weight of at least 0.4% and preferably not more than 1.5%. To limit absorption, the inner sheet 5 may be made of mineral glass, in particular calcium silicate, or aluminosilicate, or borosilicate, and has a total iron oxide content (expressed as Fe2O3) by weight of not more than 0.05% (500 ppm), preferably not more than 0.03% (300 ppm) and not more than 0.015% (150 ppm), and in particular greater than or equal to 0.005%. The redox of the inner glass sheet 5 is preferably greater than or equal to 0.15.

[0095] The inner sheet can also be made of polymer, in particular polyurethane (PU), polycarbonate (PC), poly(methyl methacrylate) (PMMA), or poly(vinyl chloride) (PVC). The inner sheet can be flexible to follow the curvature of the curved or pre-formed outer glass sheet.

[0096] The outer glass sheet and even the chosen inner glass sheet can be produced by the "float" process, which allows for obtaining a perfectly flat and smooth sheet, or by drawing or rolling processes.

[0097] Examples of glass include float glass of classic soda-lime composition, possibly hardened or tempered by thermal or chemical means, aluminum or sodium borosilicate or any other composition.

[0098] In the present text, light transmission is calculated for example from the transmission spectrum between 380 and 780 nm taking into account illuminant A and the CIE 1964 reference observer (10°).

[0099] For the glazing and in particular a roof, for example, 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 and at most 1% in the tinted state with a variable tint device.

[0100] The means for extracting the light may define at least a first diffusing zone, for example with a width of at least 0.5mm, in particular a first diffusing zone that is solid and / or comprising a set of discontinuous diffusing patterns.

[0101] The glazing may include 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, a luminous signage (arrow, letter...).

[0102] The means of extracting the guided light in the light guide 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) preferably transparent with a refractive index greater than or equal to the index of the inner sheet 5, in particular of at least 1.48. The binder may be a transparent ink.

[0103] The means for extracting light can be temporary (detachable stickers) and therefore added or replaced, in particular on the Fb face (F4), or permanent, in particular on the Fa face (F3).

[0104] When the light extraction means are a diffusing coating (printed ink) on an interlayer PVB 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 to retain the glass fragments, it is also preferable to have the extraction on PVB rather than on glass.

[0105] Preferably the diffusing coating and its substrate (inner sheet, interlayer in contact with face F3) has a light transmission of at least 80% and a blur of at most 30%.

[0106] 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.

[0107] Preferably, when the substrate of the diffusing coating is the inner interlayer, it is chosen to be PVB-based without plasticizers or with at most 15%, 10%, or 5% plasticizers. For example, the thickness of the inner interlayer forming the substrate is at most 200 µm.

[0108] An example of a diffusing coating on a polymer layer, in particular a laminate interlayer and based on PVB, is described in document WO2021 / 005162. An example of a diffusing coating on a layer of PVB or glass laminate interlayer is described in document WO2023 / 285743.

[0109] Preferably, the diffusing particles (dielectric, organic, or mineral, for example, metal oxides) have a particle size defined by D90 of less than 2 µm, preferably between 100 nm and 700 nm, in particular 400 nm ± 100 nm. Preferably, the diffusing particles are selected from non-luminescent particles of TiO2, SiO2, CaCO3, ZnO, Al2O3, and ZrO2. Preferably, the particles have a refractive index greater than or equal to 1.8, or even 2.

[0110] The present invention also relates to a motor vehicle incorporating the glazing as mentioned above, in particular a roof, a side glazing in particular fixed, a fixed glazed door, in particular a roof when it is fixed (canopy or “canopy” in English).

[0111] A road motor vehicle is defined as a car, in particular a utility vehicle (van, panel van, delivery van) under 3.5 tonnes (light commercial vehicle), or a truck, or a shuttle, small public or private transport vehicle. It may be an autonomous or semi-autonomous road vehicle.

[0112] Other features and advantages of the invention will become apparent from the following description, with reference to the accompanying figures, which illustrate:

[0113] [Fig-1]: a schematic and partial cross-sectional view of a 100 illuminateable laminated vehicle glazing in a first embodiment, in particular roof glazing with an overmolded peripheral seal forming encapsulation of the edge of the glazing;

[0114] [Fig.l']: a schematic perspective view from below, i.e. from inside a vehicle, of the glazing of the [Fig.l], (without the seal);

[0115] [Fig.l']: a schematic perspective view from below, i.e. from inside a vehicle, of the glazing of the [Fig.l], in variant (without the seal);

[0116] [Fig.2]: A schematic and partial cross-sectional view of a laminated vehicle glazing illuminable 200 in a second embodiment, in particular roof glazing with seal;

[0117] [Fig.2']: a schematic perspective view from below, i.e. from the inside of a vehicle, the glazing of the [Fig.2], (without the seal);

[0118] [Fig.3]: A schematic and partial cross-sectional view of laminated vehicle glazing illuminable 300 in a third embodiment, in particular roof glazing with with seal;

[0119] [Fig.3']: a schematic perspective view from below, i.e. from the inside of a vehicle, the glazing of the [Fig.3];

[0120] [Fig.4]: A schematic and partial cross-sectional view of laminated vehicle glazing illuminable 400 in a fourth embodiment, in particular roof glazing with with seal;

[0121] [Fig.5]: a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 500 in a fifth embodiment, in particular roof glazing with seal;

[0122] [Fig.6]: a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 600 in a sixth embodiment, in particular roof glazing with seal;

[0123] [Fig.6']: a schematic perspective view from below, i.e. from inside a vehicle, of the glazing of the [Fig.6];

[0124] [Fig.7]: A schematic and partial cross-sectional view of a laminated vehicle glazing illuminable 700 in a seventh embodiment, in particular roof glazing with seal;

[0125] [Fig.8]: a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 800 in an eighth embodiment, in particular roof glazing with seal;

[0126] [Fig.8]'] : a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 800 in a variant of the eighth embodiment, in particular roof glazing with seal.

[0127] [Fig.8]'] : a schematic cross-sectional view of an illuminable vehicle laminated glazing 800 in an eighth embodiment, in particular roof glazing with seal.

[0128] For clarity, identical or similar features are identified by identical reference numerals throughout the figures. The features shown are not to scale. The terms "exterior" and "interior" will be used with reference to the glazing arrangement on a roof opening of a motor vehicle, the exterior referring to the volume outside the vehicle, and the interior to the volume of the passenger compartment. In all the accompanying cross-sectional views, the exterior is located at the top of the figures, and the interior at the bottom.

[0129] In the following examples, we consider a laminated glazing with two sheets of glass, we will designate by face Fl or 11 the outer face of the outer sheet of glass, by face F2 or 12 the inner face of this outer sheet of glass, by face F3 or 13 the outer face of the inner sheet, and by face F4 or 14 the inner face of this inner sheet.

[0130] Figure 1 is a schematic and partial cross-sectional view of an illuminable laminated vehicle glazing 100 in a first embodiment, in particular a roof glazing with a peripheral seal which is an encapsulation of the edge of the glazing. [Fig. 1]' is a schematic perspective view from below, i.e. from inside a vehicle, of the glazing of [Fig. 1], (without the seal) and [Fig. 1]” an alternative.

[0131] More specifically, it is a 100% illuminable laminated glazing for vehicles, comprising laminated glazing with a 10, 20, or 30 mm edge, quadrilateral with two longitudinal edges (parallel or not) and two lateral edges (front and rear edges in the mounted position for a roof, parallel or not), laminated glazing in particular curved, comprising:

[0132] -an outer glass sheet 1 with a first slice 10, 101 to 104 and a first main face called face Fl 11 and a second main face face F2 (12, for example a tinted glass)

[0133] - a laminated interlayer 3 with an interlayer slice 30, 301 to 304, single or multilayer, for example based on PVB (with plasticizers for at least one layer),

[0134] - an inner transparent sheet 2 with a second slice 20, 201 to 204, an outer main face F3 13 oriented towards face F2 and an opposite inner main face F4 14, preferably a sheet of extra-clear glass (better light guide)

[0135] and a peripheral masking layer 4, 401 to 404, which is a coating here of black enamel on face F2, having an inner edge 41 between faces F2 and F3 and an outer edge 40, 401 to 404.

[0136] The first and second layers 10, 20 are rounded (and polished) on all their edges. In particular, the distance referred to as the rounding distance (measured in the plane of the glazing) between the beginning of the rounded edge 10' and the end of the rounded edge is at most half the thickness. In particular, for the outer layer (for example, at most 2.2 mm thick), the rounding distance is at most 1.5 mm or 1.2 mm. In particular, the rounding here can be continuous from one corner to the other of the layer 10 or 20 or with a more or less extensive flat section in the middle (see [Fig. 9] extended flat section). Conventionally, the edges of the layers 1, 2 are rounded by grinding. The rounding can vary; in particular, the rounding distance 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 slice is preferably measured from the extreme point of the rounded end of the second rounded slice.

[0137] The outer slice 40, is on all its edges called outer edges 401 to 404 (cf. [Fig.1]', 1”), a withdrawal rl of zero or at most 0.2mm from the beginning of the rounding 10' of the first slice, rl can vary from one edge to the other for example by less than 0.2mm.

[0138] The masking layer 4 forms a band of enamel, notably black, framing the glazing. Opaque coating is applied around the entire periphery to conceal bodywork elements or This masking layer 4 protects joints or adhesives for mounting on the vehicle. Its inner edge 41 defines the clear glass area. 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 the rear. The masking layer 4 is preferably a continuous layer (flat with a solid edge) or, alternatively, a gradient edge (a series of patterns). The optical density of the masking layer is at least 2 and preferably 4 or 5.

[0139] The vehicle roof 100 comprises, beneath 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 an array of light-emitting diodes (on a printed circuit board such as a PCB, for example, flexible), in particular a straight strip optically coupled with the inner sheet 2 forming a light guide. The optical coupling of each light source with the inner sheet 2 is achieved here by a local light redirection element, here by a (multi)prismatic light redirection element 6, reflector on face side F3, or alternatively by a transparent light redirection element on face side F4, in particular prismatic (macroprism and / or multiprisms). The prisms may have a height of at least Ipm and preferably of at most 100 pm, 50 pm, or 30 pm.Preferably, the prismatic redirecting element is narrower than the width of the masking layer 4, preferably by at least 1 cm, and in particular of a length similar to that of the linear (custom-made) light source. It could be a rectangular strip with rounded corners, for example.

[0140] In particular, the light redirection element is a prismatic reflecting element, comprising reflecting prisms, arranged:

[0141] - on face F3, in particular in contact with the intercalated layer in contact with this F3 face, or with an interlayer frame (light),

[0142] - in the laminate interlayer 3, particularly based on PVB, and in particular on the intercalated layer in contact with face F3.

[0143] The reflecting prisms can be oriented towards face F2 or F3.

[0144] The light source is then opposite or offset from face F4, and in particular by direct optical coupling or via optics on the F4 side, for example, to orient or collimate the beam. The light source can be fixed to face F4. Such an example of coupling is described in application WO2023 / 144282. For example, the transparent prismatic film (then on face F4) comprises a transparent thermoplastic film, for example, based on polyethylene terephthalate (PET), on which the transparent prisms are formed from a polyacrylate (a resin crosslinked, for example, by UV). For the reflective prismatic film, an additional metallic layer. The reflective prismatic film 6 forms a longitudinal band like the light source. Alternatively, the prismatic film 6 is a monolithic polymer film, for example preformed, and the reflective layer is applied.

[0145] The vehicle roof 100 further comprises light extraction means 7, which are on face F3 or face F4, for example in the form of a diffusing coating preferably transparent, with a binder and diffusing particles, binder (organic, mineral or hybrid) preferably transparent with a refractive index greater than or equal to the index of the inner sheet, in particular of at least 1.48. Preferably, the diffusing coating is an ink printed on an interlayer based on PVB without plasticizer or with at most 15% or 10% or 5% plasticizers, in particular the thickness of the interlayer is at most 200 µm.

[0146] The glazing 100 cooperates with the vehicle roof structure (not shown in [Fig.1]), via a peripheral seal 8 which ensures its watertight connection with this structure. It is a polymeric encapsulation (made by injection) framing the laminated glazing, preferably of the same color (or close to it) as the masking layer, in particular black.

[0147] More specifically, the seal 8 first has an internal wall with a first zone 81 in contact with the second slice 20 and the interlayer slice 30, a second zone 82 in contact with the first slice 10, and a third zone 83 in contact with the face F4. The seal 8 also has an external wall having a peripheral lip 80, a lip intended to cooperate with the roof opening structure of a vehicle, and a top surface 84 here flush (or sub-flush) with the face Fl 11. The triangle 60 symbolizes the bead of adhesive on the face F4, conventionally centered between 20 mm and 25 mm (at least 30 mm) from the first slice.

[0148] 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 zero or at most 0.2mm indentation from said origin of the rounding 10' of the first edge.

[0149] All around the perimeter of the glazing, the interlayer edge 30, 301 to 304 is aligned with the first edge 10, 101 to 104 (extreme point of rounding) protruding by a distance r2 from the external edge 40, 401 to 404 for example of at most 1.2mm.

[0150] On at least three edges 201, 202, 204, the second slice (extreme point of rounding) extends by a distance r'2 from the outer slice 401, 402, 404 and remains recessed 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 create a barrier to light.

[0151] According to the invention, either the last edge 203 is also set back (see [Fig.l]”) from the first slice 103 or it is a reference edge 203 for example front edge of a roof (see [Fig.l]”) aligned with the first slice.

[0152] Fig. 2 is a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 200 in a second embodiment, in particular roof glazing with seal forming encapsulation 8. Fig. 2 is a schematic perspective view from below, i.e. from inside a vehicle, of the glazing of Fig. 2, (without the seal).

[0153] The roof glazing 200 differs from the roof glazing 100 in that on at least 3 edges 201, 202, 204 the second slice 20 (extreme point of rounding) is recessed r'2 from the outer slice 401, 402, 404, for example, by no more than 1 mm. The encapsulation 8, particularly under the rounding, helps to create a barrier to light.

[0154] 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 (cf [Fig.2]'), for example the front edge of a roof.

[0155] Alternatively, roof glazing 200 differs from roof glazing 100 also in that glazing 200 comprises an infrared-absorbing or infrared-reflecting (solar control) layer on face F2 or, alternatively, on a transparent polymer film (PET, etc.) between two interlayers, in particular a stack of thin films comprising at least one metallic layer such as silver (and even 2, 3, or 4 silver layers), the silver layer or layers being arranged between dielectric layers on face F2. Also, cumulatively or alternatively, the glazing comprises an external electroconductive coating, in particular infrared-reflective (low emissivity), such as a stack of transparent conductive oxide (TCO) layers (in particular based on indium tin oxide (ITO) or fluorine-doped tin oxide), on face F4, the TCO layer being arranged between dielectric layers.

[0156] Fig. 3 is a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 300 in a third embodiment, in particular roof glazing with the polymer encapsulation joint 8. Fig. 3 is a schematic perspective view from below, i.e. from inside a vehicle, of the glazing of Fig. 3.

[0157] Roof glazing 300 differs from roof glazing 100 in that the lamination interlayer has a peripheral opaque interlayer layer 9, for example a black PVB with a near-zero TL, with an inner edge 91 under the masking layer and an outer edge 90 still aligned with the first edge 10. This is an additional precaution against light leakage.

[0158] 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 for example front edge of a roof (cf [Fig.3]') aligned with the first slice.

[0159] The [Fig.4] is a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 400 in a fourth embodiment, in particular roof glazing with encapsulation seal 8.

[0160] The roof glazing 400 differs from the roof glazing 100 in that the spacer edge 30 is slightly recessed from the outer edge 40, for example by no more than 5 mm (around the entire perimeter). In practice, the spacer edge 30 could be aligned with the outer edge. The relative position of the spacer edge 30 with the outer edge can vary from one outer edge to the other.

[0161] 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 front edge of a roof aligned with the first slice.

[0162] The [Fig.5] is a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 500 in a fifth embodiment, in particular roof glazing with encapsulation seal 8.

[0163] The 500 roof glazing differs from the previous 400 roof glazing by a greater reduction in the second slice which can help to evacuate bubbles.

[0164] 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 front edge of a roof.

[0165] The [Fig.6] is a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 600 in a sixth embodiment, in particular roof glazing with glued-on seal 8'.

[0166] The roof glazing 600 differs from the roof glazing 100 by the profiled seal 8' which cooperates with the roof structure of the vehicle 70, making it possible to ensure the watertight connection with this structure by its compression.

[0167] This profiled peripheral seal framing the laminated glazing can be made of a flexible polymer material, in particular a thermoplastic, mono-hardness, opaque (absorbent and / or reflective), such as PVC or TPE, polyurethane, a synthetic rubber such as EPDM, or any other suitable material. This seal can be produced by extrusion or injection molding and can be bonded, in particular, with an adhesive (double-sided, woven adhesive, mechanically reinforced, etc., preferably without fining) to the F4 14 face. Preferably, the thickness of the seal does not vary by more than 30%, and even 20% (for mechanical strength). The seal is preferably the same color (or close to it) as the masking layer, in particular black.

[0168] More specifically, the profiled joint 8 first has an internal wall 81, 82, 83 (smooth, bare, possibly reflective) with: • a bearing surface 82 in contact with the first slice 10, (extreme point or any other point of the rounding) • a fixing surface 83 bonded by adhesive 85 to face F4, preferably over a fixing width of at least 4mm and even 6mm and preferably at most 12mm - a lateral surface 81 opposite the edge of the glazing under face F2 in particular with a lateral area opposite the second edge and another lateral area opposite the edge of the spacer, the lateral surface may be slightly downstream of the fixing surface.

[0169] The profile 8' also has an external wall having an internal surface 86 free on the passenger compartment side, a peripheral lip 80 lip intended to cooperate with the roof opening structure of a vehicle and a top surface 84 here flush (or sub-flush) with the face Fl 11. The peripheral lip 80 ensures the return of the bearing surface 82 of the joint against the first slice 10 (as indicated by the arrow F in the other examples with the structure).

[0170] For simplicity, the interleaf slice 30, 301 to 304 is aligned with the first slice 10, 101 to 104 all around.

[0171] On at least three edges 201, 202, 204, the second slice (extreme point of rounded edge) is aligned with the outer slice 40 and remains set back r3 with the first slice 10 (extreme point of rounded edge) 101, 102, 104.

[0172] 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 (cf [Fig.6]') for example front edge of a roof aligned with the first slice.

[0173] Fig. 7 is a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 700 in a seventh embodiment, in particular roof glazing with glued-on seal 8'.

[0174] The roof glazing 700 differs from the previous roof glazing 600 in that the interlayer edge 30 (around the entire perimeter) and the second edge 20 (on at least 3 edges) are recessed from the outer edge, for example, by a maximum of 15 mm or 10 mm and / or by at least 5 mm or 3 mm. The protruding portion of the masking layer serves to block certain rays.

[0175] 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.

[0176] Fig. 8 is a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 800 in an eighth embodiment, in particular roof glazing with bonded added seal 8'.

[0177] The 800 roof glazing differs from the previous 700 roof glazing by an opaque peripheral interlayer 9 such as a black PVB.

[0178] The [Fig.8]' is a schematic and partial cross-sectional view of an illuminable vehicle laminated glazing 800 in a variant of the eighth embodiment, in particular roof glazing with bonded added seal 8'.

[0179] The 800' roof glazing differs from the previous 800 roof glazing by another peripheral opaque element 9, namely a black ink on a main face of the interlayer (side F3 or F2 or even within a multi-layer interlayer).

[0180] Fig. 9 is a schematic cross-sectional view of an illuminable vehicle laminated glazing 900 in a ninth embodiment, in particular roof glazing for example encapsulated or in variant with attached profile seal.

[0181] This 900 glazing, preferably rectangular and curved in one or more directions, comprises, from the outside in:

[0182] - an outer glass sheet 1 which may be a 2.1mm Planiclear glass with an IR 15 reflective coating (silver stacking), the whole having a TL 71.8% (91% without the reflective coating),

[0183] - an inner transparent sheet 2, preferably of mineral glass, here also shape and dimensions of sheet 1, forming the internal glazing, passenger compartment side, (for example, a sheet of extra-clear soda-lime glass such as Diamant glass marketed by 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 of approximately 1.52 at 600 nm or Optiwhite glass of 1.95 mm, or Sunmax glass of 2.05 mm), with here an emissivity 16 base coat based on ITO on face F4

[0184] - between face F2 and face F3, a transparent lamination interlayer 3, including here:

[0185] - an inner interlayer 31 of PVB (with plasticizers, at least 30% in weight), clear (as transparent as possible and with as few optical defects as possible), 0.38mm or 0.76mm (in one or two sheets) in adhesive contact with face F3, with a refractive index n3 of approximately 1.48 at 600nm, for example PVB with a TL of 99.9%.

[0186] - an intermediate interlayer 33, in particular thermoplastic, here based of PVB (with plasticizers, at least 30% by weight), 0.38mm or 0.76mm (in one or two sheets) clear or in a tinted variant, for example tinted grey with a TL of 27%,

[0187] - an outer interlayer 33, in particular thermoplastic, here based on PVB (with plasticizers, at least 30% by weight), 0.38mm or 0.76mm (in one or two sheets) with adhesive contact on face F2, clear or in a tinted variant, for example tinted grey of TL at 27%.

[0188] Alternatively, the inner interlayer 31 is PVB-based with no or few plasticizers (in particular less than 5% by weight), in particular MOWITAL film, for example with a thickness of at most 100 µm. Alternatively, the interlayer Interior 31 is based on cross-linked polymer adhesive material, in particular polyacrylate adhesive film

[0189] The glazing 900 includes the masking layer in enamel 4 forming a masking frame delimiting a clear window 41 (daylight) here rectangular.

[0190] To optically isolate an inner portion (with light guide and light extraction) from the tinted, absorbent outer portion, the glazing 900 further comprises an optical insulating element 92 with a refractive index lower than that 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 entire clear area of ​​the glazing and beyond, its edge being beneath the masking layer 4. The film 92 is here less than 200 µm thick, or even at most 100 µm, and is protected at its periphery by one or both of the outer and intermediate interlayers (particularly by thinning during lamination). The interface between the two interlayers 31 and 32 can be indistinguishable.

[0191] The electrically controlled device, here a variable diffusion device 93, is located between the outer interlayer 33 and the intermediate interlayer 32, preferably tinted, gray, particularly made of PVB. The thickness of the device 93 being, for example, 0.4 mm, an interlayer frame 34, 0.38 mm thick, made of PVB, clear or tinted, is added. The edges of the device 93 are below the mask layer 2. For example, the blurring of the roof in the diffusing state with the device 93 is at least 80%. The variable diffusion device 93 comprises:

[0192] - a first substrate (125µm PET for example) with a first coating electroconductor (e.g., ITO) on the side of face F2,

[0193] - an electro-active layer, based on liquid crystals in a polymer matrix (for example PDLC in English),

[0194] - a second substrate (e.g., 125µm PET) with a second coating electroconductor (e.g. ITO) on the side of face F3.

[0195] The electroconductive coatings at the periphery are not covered by the electroactive layer, and current inlets in the form of strips are provided for the power supply. For the purpose of protecting the electroactive layer, a chemical protection means (barrier to any plasticizers in the PVB) may be provided, for example by means of glued or contacted PET polymer strips.

[0196] Alternatively, the variable diffusion device is replaced by an electrochromic device or by a functional PET film (tinted etc.) or by a photovoltaic device.

[0197] For the illumination function, the following are provided, masked from the outside by the masking layer 5:

[0198] - light-emitting diodes 5 (here front-emitting) on ​​a support (by (e.g., PCB) opposite (or offset from) face F4,

[0199] - face side F3, a light redirection element 6, local, peripheral as a prismatic reflector film 6.

[0200] The prismatic reflective film 6 is here under the optical insulator 92. As a precaution to prevent stray light from passing through the film and even the masking layer 4, an optional internal opaque element is added to the prismatic film 6 (of the same width and not exceeding the inner edge of the film 92), here an opaque (black) ink or a bonded black PET film. Alternatively, a transparent prismatic film is chosen on the F4 side, downstream of the diodes.

[0201] It is preferable to double the illumination means by adding another light source on its support, another prismatic reflector film along the other longitudinal edge of the glazing 900. In particular, on each side, there can be a set of diode strips on supports that are either disjointed or connected to each other. They can also be placed on the front or rear edges. The light extraction means 7 are, for example, extended or point geometric patterns.

[0202] For this 900 glazing, for example, an encapsulation 8 or a bonded, attached profile like those shown in the previous examples can be chosen. In particular, the lower layer 3 is an opaque PVB at the periphery, or the latter 31 is coated with an opaque black ink at the periphery.

[0203] As will be understood from the foregoing, the present invention provides an effective solution for substantially reducing or eliminating light leakage around the periphery of an illuminated glazing connected to a structure by a peripheral polymeric encapsulation.

[0204] Naturally, the invention is described above by way of example. It is understood that a person skilled in the art is able to carry out different embodiments of the invention without departing from the scope of the invention.

Claims

Claims

1. Illuminable laminated glazing for a vehicle (100 to 900), comprising a laminated glazing with an edge (10, 20, 30), laminated glazing 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 called face F2 (12), an inner transparent sheet (2) with a second edge (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 an edge called interlayer (30, 301 to 304), and a peripheral masking layer (4, 401 to 404,) which is a coating on the face F2, having an inner edge (41) between faces F2 and Fa and an external edge (40, 401 to 404) with external edges (401 to 404), characterized in that the outer sheet has a rounded edge,and the external edge (40) has for all the external edges (401 to 404), a shrinkage rl of zero or at most 0.2 mm from said start of the rounding of the first edge, 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 rl 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. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that the edge interlayer (30) extends beyond the outer edge and preferably is 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 bonded 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 outer edge and is even preferably aligned with the first edge, the second edge preferably set back by at most 5 mm or 3 mm 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 set back preferably by at most 5mm or 3mm from the external edge, optionally the second edge is set back or aligned with the interlayer edge preferably by at most 5mm.

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 bearing 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 the face F2 or with the face Fa, - or at least a fraction of opaque thickness of the lamination interlayer, in particular an opaque interlayer layer.

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) 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 optional peripheral opaque element (9) has an optical density of at least 2, and preferably at least 3, at least 4, at least 5.

14. Illuminatable 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), or a first light source (5) optically coupled to the second edge or to a hole wall of the inner sheet, and preferably it comprises a second light source (5'), in particular first and second longitudinal sources along the longitudinal edges of the glazing, and in that it comprises light extraction means (7) linked to the inner sheet, in particular to the face Fa (13).

15. Illuminatable 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

16. 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. 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.

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