Illuminated laminated vehicle glazing

Abstract

The invention relates to an 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 edge is set back r1 from the first edge on at least a first edge called the offset outer edge. It comprises a peripheral seal (8), which is an opaque polymeric encapsulation of the edge of the glazing, framing the laminated glazing, and in the area of ​​the offset outer edge, between the outer edge and the first edge, extends the encapsulation and / or a peripheral opaque element linked to the lamination interlayer. (Fig. 1)

Description

Title of the invention: Illuminatable laminated vehicle glazing

[0001] The present invention relates to an illuminable laminated vehicle glazing, in particular a vehicle roof, illuminable 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 in optical coupling 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 extraction of 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 illuminable vehicle glazing reducing and even cancelling this parasitic light effect at the edge of the glazing.

[0005] To this end, the present invention proposes 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, flat, rounded) and a first main face called face F1 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 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 a so-called interlayer edge, 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 edge is set back rl from the first edge on at least one first edge called the offset outer edge and even on all the edges. The setback rl is similar from one edge to the other (delta of the rl of at most 0.2 mm)

[0007] The illuminated laminated glazing according to the invention comprises a peripheral seal, which is an opaque polymeric encapsulation of the edge of the glazing, framing the laminated glazing, (in contact with the edge of the glazing and / or via an adhesion primer, possibly opaque, black in particular on the second edge and the first edge). In the (each) zone of the offset external edge, between the external edge and the first edge, the encapsulation and / or a peripheral opaque element (absorbent and / or reflective) linked to the lamination interlayer extends.

[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 rl 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 shrinkage of width rl or even in the area of ​​the rounding if the first slice is rounded.

[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] In the glazing according to the invention, the encapsulation and / or the opaque element linked to the lamination serve as a barrier (partial or total) with respect to the light rays likely to escape at the periphery of the glazing. In particular, the face Fa is upstream of the zone of the withdrawal rl or the face Fa (or the rounding of the second rounded edge) is separated from the zone rl by an opaque means, namely the encapsulation and / or the peripheral opaque element.

[0012] When the face Fa (F3) is downstream of the outer edge (and / or the rounding of the second edge) and the interlayer edge is set back from the first edge, 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 opaque element linked to the interlayer. Also, in the absence of the opaque element, it is preferred when the interlayer edge is set back from the first edge, in particular aligned or set back R from the outer edge (for example by at most 5 mm or 3 mm), that the second edge is aligned or set back from the outer edge, for example by at most 10 mm or 5 mm or 3 mm. It is particularly preferred that the second edge is set back from the interlayer edge, in particular by at most 5 mm or 3 mm. This promotes the evacuation of the bubbles.

[0013] 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.

[0014] Thanks to the invention, before 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, an opaque encapsulation primer (carbon black, etc.) can be used, which also contributes to the barrier without being sufficient as such.

[0015] Concerning the peripheral opaque element, it is preferred that it be bonded 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 slice, which can overflow, and lengthens the manufacturing time, which is not very compatible with industrial requirements.

[0016] The glazing may be devoid of a peripheral opaque element (linked to the interlayer), in particular on at least 3 external edge zones (offset) or even all the external edge zones (offset), in particular for reasons of economy.

[0017] In the roofs of the prior art, there may be a parasitic light line that is more intense on one edge or several edges than on other(s). This light line may be continuous or dotted. Also naturally, the arrangement of the encapsulation and / or the peripheral opaque element preferably applies to several offset edges and even all edges.

[0018] In one embodiment, the face Fb is offset from the withdrawal zone rl, under the masking layer or the face Fb is present in the withdrawal zone rl, opposite and separated from the face F2 by the encapsulation and / or said peripheral opaque element.

[0019] The edge of the glazing has several edges, in particular two longitudinal edges and two lateral edges. In particular, several or all of the so-called offset external edges of the external edge are set back rl from the first edge, in particular all the setbacks rl are identical or similar (delta rl of at most 0.2 mm). The setback r2 (from the extreme point if the second edge is rounded) may vary by less than 0.5 mm from one offset external edge to the other. A setback r2 may be deliberately differentiated, for example some sized to house a light source, some without a light source or optical coupling element. It is preferred that the light source(s) be outside the encapsulation.

[0020] 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.

[0021] For reasons of manufacturing laminated glazing, it is sometimes necessary that at least one edge (and even just one) of the second slice be aligned with an edge of the first slice (reference edge, by abutment when assembling 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).

[0022] In one embodiment, all the so-called offset external edges of the external edge are set back rl from the first edge. In 2, 3 offset external edge zones, the second edge is set back from the first edge or even aligned or set back r2 from the external edge, the encapsulation is opposite the face F2 by a setback of the interlayer edge relative to the first edge and / or by a setback of the second edge relative to the first edge, the encapsulation preferably extends to at least the external edge. And / or said peripheral opaque element extends over the 2, 3 offset external edge zones, beyond the external edge and at most to the first edge. Preferably, where appropriate, the interlayer edge is set back from the external edge by at most 5 mm, 3 mm.

[0023] And in 1, 2 offset outer edge zones, an edge, called reference, preferably front edge of a roof, the second edge is aligned with the first edge, the encapsulation is opposite the face F2 by a withdrawal of the interlayer edge relative to the first edge, the encapsulation preferably extends to at least the outer edge and / or the outer edge of the peripheral opaque element extends beyond the outer edge and at most to the first edge, preferably where appropriate, the interlayer edge is set back from the outer edge by at most 5mm, 3mm

[0024] In one embodiment, all the so-called offset external edges of the external edge are set back rl from the first edge, in 2, 3 or 4 offset external edge zones, the encapsulation is opposite the face F2 by a setback of the interlayer edge relative to the first edge and / or by a setback of the second edge relative to the first edge, the encapsulation preferably extends to at least the external edge. Preferably, where appropriate, the interlayer edge is set back from the external edge by at most 3 mm.

[0025] In one embodiment, all the so-called offset external edges of the external edge are set back rl from the first edge, in 2, 3 or 4 offset external edge zones, the encapsulation is opposite the face F2 by a setback of the second edge relative to the first edge, the encapsulation preferably extends to at least the external edge (and with a setback of at most 5 mm, 3 mm from the external edge), and better still the interlayer edge is aligned with the first edge.

[0026] From a manufacturing process point of view, it is easy to align the interlayer slice with the first slice. For example, deburring (brushing, abrasion) of the interlayer which may have crept beyond the first slice after lamination is carried out. 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 possible finishing.

[0027] In one embodiment, all the so-called offset external edges of the external slice being set back rl from the first slice, in 2, 3 or 4 offset external edge zones, the encapsulation is opposite the face F2 by a setback of the interlayer slice, the encapsulation being between the faces F2 and Fa in particular over at most 3mm and preferably over at most 5mm and / or over at most the setback rl.

[0028] In one embodiment, all the so-called offset external edges of the external edge being set back rl from the first edge, in 2, 3 or 4 offset external edge zones, the second edge protrudes from the external edge, in particular still set back from the first edge (zone rl or rounded edge zone), said peripheral opaque element extends beyond (protrudes) the external edge and preferably with an external edge up to the first edge,

[0029] The peripheral opaque element may be continuous, or in pieces, abutted on several external edges, closely spaced, at the corners, etc. The peripheral opaque element preferably forms a frame.

[0030] 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 or projecting from the face FL. The encapsulation can be made of polyurethane, in particular PU-rim (reaction in mold in English). 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.

[0031] In particular, the extent of any shrinkage of the inner sheet can be limited in order to maintain the structure's fixation with a bead of glue preferably of at most 30 mm, in particular between 20 mm and 30 mm (bead 1 cm to 1.5 cm wide, 5 mm thick) from the first slice. The shrinkage r2 can be minimal, for example at most 2 mm or 1 mm.

[0032] Preferably, the first and second slices are rounded (polished) - for all edges -, rl is from the start of the rounded edge of the first slice, in particular the distance (taken in the plane of the glazing) between the start of the rounded edge and the end of the rounded edge is at most half the thickness of the sheet (inner or outer), in particular at most 1.5 mm or 1.2 mm for the outer sheet and even the inner sheet.

[0033] The possible peripheral opaque element extends between the start of the rounded edge and the end of the rounded edge of the first edge and in particular the second edge, rounded, protrudes from the external edge.

[0034] In particular, in the or each offset external edge zone, the external edge has a withdrawal rl of at most 5 mm, 2 mm from the first edge, preferably from the start of a rounded edge of the first rounded edge.

[0035] 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 40 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).

[0036] 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.

[0037] In the one or more (or all) offset outer edge zones, the peripheral opaque element has a so-called outer edge preferably between the outer edge and the first edge (in the withdrawal zone rl and / or in the rounding zone). The peripheral opaque element in particular is: • 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).

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In particular, said masking layer is an opaque enamel coating on the face F2 with said withdrawal rl of at most 5mm or 2mm and even 1mm from the first slice, the inner sheet is an extra-clear glass sheet and / or the lamination interlayer, mono or multilayer, comprises a PVB interlayer preferably comprising plasticizers in adhesive contact with the face F2, in the or each external edge offset in withdrawal, aligned or protruding from the second slice.

[0042] The glazing according to the invention may comprise, opposite the masking layer, a first light source (diode strips) which is:

[0043] - arranged under the face Fb (F4) and associated with a light redirection element, in particular a light redirection element reflector, in particular a prismatic element, is located on the side of face Fa (F3) or a transparent one is located on the side of face Fb (F4).

[0044] - 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).

[0045] 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). It comprises light extraction means linked to the inner sheet, in particular to the face Fa (F2).

[0046] 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 clear glass), 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 a 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, e.g. different color or intensity, controlled independently or simultaneously) along both sides.

[0047] The optical coupling of the light source with the inner sheet forming an optical guide can be carried out as follows:

[0048] - by a local light redirection element, by a light redirection element light reflector on the F3 side, or by a transparent light redirection element on the F4 side,

[0049] - by all or part of the second tranche,

[0050] - 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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, 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.

[0055] The light redirection reflecting element can be glued to the face F3 directly or via at least one glue or held by suction (strong interaction). The reflecting prisms are oriented on the face F2 side or on the face F3 side. The prisms can have a height of at least 1 pm and preferably at most 100 pm or 50 pm or 30 pm. Preferably the redirecting prismatic element has a width less than the width of the masking layer, preferably at most 10cm or 5cm and at least 1cm and in particular of a length similar to that of the light source, linear (custom-made). This can be a rectangular strip with rounded corners for example. In particular, the light redirection element is a prismatic reflective element, comprising reflective prisms, arranged:

[0056] - on the face F3 in particular in contact with the interlayer in contact with this face F3, or with an interlayer frame (clear),

[0057] - in the lamination interlayer, in particular 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” 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:

[0067] - an electrically controllable device, in particular with variable diffusion, in particular with liquid crystal base (PDLC, PNLC, CLC, etc.) or variable tint, particularly based on electrochromic or optical valve (SPD for suspended particle device in English), device comprising an electro-active layer between an electro-conductive support on the inner side of the outer glass sheet and an electro-conductive support on the outer side of the inner sheet, (with possibly additional alignment layers)

[0068] - a photovoltaic device, in particular with one or more cells connected photovoltaic systems, in one or more lines,

[0069] - a functional film.

[0070] The glazing, in particular the roof glazing, may incorporate one or more functional (non-adhesive) elements, in particular:

[0071] - 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,

[0072] - a functional polymer film, for example an infrared reflective 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 locally or preferably extending over almost the entire glazing (and over the entire clear glass), with the electroconductive coating on the F2 or F3 side.

[0073] For the functional polymer film, it is possible to use, for example, a clear PET film coated with an electrically conductive layer, for example XIR from the company Eastman, or a coextruded PET-PMMA film, for example of the SRF 3M® type.

[0074] 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 electro-chromic functional elements known, for example, from EP3702572A1 or EP2917159A1.

[0075] The glazing comprises at least one of the functional elements selected from the group comprising:

[0076] - an inner, peripheral opaque layer on the face Fb (F4) of the sheet interior, in particular congruent or of width less than the width of the masking layer,

[0077] - 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,

[0078] - an electroconductive coating, in particular reflecting infrared such as than a stack with silver layer(s), on the F2 face or on an additional film, in particular polymer,

[0079] - an electroconductive coating, in particular reflecting infrared rays, such as than a stack with a transparent conductive oxide layer, on the Fb face (F4).

[0080] The glazing may in particular comprise an infrared-reflecting or -absorbing layer, on face F2 or on a transparent polymer film (PET etc.) between two interlayers, in particular a stack of thin layers comprising at least one metallic layer such as silver (and even 2, 3 or 4 layers), the or each silver layer being arranged between dielectric layers on face F2 or at 1TTO for face F4.

[0081] Mention may be made, as a 1TTO stack for the F4 face, of those described in US2015 / 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 indium tin oxide (ITO), a dielectric coating comprising dielectric layers such as silicon nitride and silicon oxide layers.

[0082] The outer glass sheet may be made of mineral glass or may be based on silica, preferably silicosodocalcic, 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 silicosodocalcic, 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.

[0083] 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.

[0084] The outer glass sheet and even the chosen inner glass sheet can be produced by the "float" process, which allows a perfectly flat and smooth sheet to be obtained, or by drawing or rolling processes.

[0085] 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.

[0086] 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°).

[0087] 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.

[0088] 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.

[0089] 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.).

[0090] The means for extracting the light guided 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, transparent binder (organic, mineral or hybrid) 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.

[0091] 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).

[0092] When the light extraction means are a diffusing coating (printed ink) on a PVB interlayer 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.

[0093] 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%.

[0094] 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.

[0095] 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.

[0096] 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 layer is described by document WO2023 / 285743.

[0097] 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, Al2O3, ZrO2. Preferably, the particles have a refractive index greater than or equal to 1.8 or even 2.

[0098] 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).

[0099] A road motor vehicle is understood to mean a car, in particular a utility vehicle (van, minivan, courier) of less than 3.5 tonnes (light utility vehicle) or a truck or a shuttle, a small public or private transport vehicle. It may be an autonomous or semi-autonomous road vehicle.

[0100] Other characteristics and advantages of the invention will emerge on reading the description which follows, with reference to the appended figures, which illustrate:

[0101] [Fig-1]: a schematic and partial sectional view of a laminated vehicle glazing illuminable 100 in a first embodiment, in particular roof glazing with an overmolded peripheral seal forming encapsulation of the edge of the glazing;

[0102] [Fig.l']: a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of [Fig.l], (without the seal);

[0103] [Fig.l']: a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of [Fig.l], as a variant (without the seal);

[0104] [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;

[0105] [Fig.2']: a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of [Fig.2], (without the seal);

[0106] [Fig.2”]: a schematic perspective view from below, i.e. from the inside of a vehicle, of the glazing of [Fig.2], as a variant (without the seal);

[0107] [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,

[0108] [Fig.3']: a schematic perspective view from below, that is to say from the interior of a vehicle, of the glazing of [Fig.3];

[0109] [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;

[0110] [Fig.4']: a schematic perspective view from below, that is to say from the interior of a vehicle, of the glazing of [Fig.4];

[0111] [Fig.4']: a schematic perspective view from below, that is to say from the inside of a vehicle, the glazing of [Fig.4] in a variant;

[0112] [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;

[0113] [Fig.5']: a schematic perspective view from below, that is to say from the interior of a vehicle, of the glazing of [Fig.5];

[0114] [Fig. 5”]: a schematic perspective view from below, i.e. from the inside of a vehicle, of the glazing of [Fig.5] in a variant;

[0115] [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;

[0116] [Fig.7]: a schematic and partial sectional view of a laminated vehicle glazing illuminable 700 in a seventh embodiment, in particular roof glazing with seal;

[0117] [Fig.8]: a schematic sectional view of an illuminable laminated vehicle glazing 800 in an eighth embodiment, in particular roof glazing with seal.

[0118] 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.

[0119] 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.

[0120] [Fig.l] is 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.l]' is a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of [Fig.l], (without the seal) and [Fig.l]” an alternative.

[0121] 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:

[0122] -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 face F2 (2, for example a tinted glass)

[0123] - 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),

[0124] - 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)

[0125] 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.

[0126] 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 flat part in the middle that is more or less extended (see [Fig. 8] 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 can have a slightly different rounding distance typically with a variation of less than 0.5mm from edge to edge.

[0127] The external edge 40, is on all its edges called offset external edges 401 to 404 (cf. [Fig.l]', 1”), set back rl for example by at most 5mm, 1mm, and in particular by at least 0.5mm from the start of the rounding 10' of the first edge, rl can vary from one edge to the other for example by less than 0.2mm because the enamel deposit is made by screen printing and the nominal value of rl will depend on the wear of the grinding wheel.

[0128] The masking layer 4 forms a band of enamel, in particular black, framing the glazing. It is opaque over the entire periphery to hide bodywork elements or joints or to protect an adhesive for mounting on the vehicle. This masking layer 4 delimits in particular the window clear by its internal edge 4L. 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.

[0129] 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 bar 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 8, preferably at least 1 cm and in particular of a length similar to that of the light source, linear (custom).It can be a rectangular strip with rounded corners for example.

[0130] In particular, the light redirection element is a reflective prismatic element, comprising reflective prisms, arranged:

[0131] - on the face F3 in particular in contact with the interlayer in contact with this face F3, or with an interlayer frame (clear),

[0132] - in the lamination interlayer 3, in particular based on PVB, and in particular on the interlayer in contact with the F3 face. The reflecting prisms can be oriented towards the F2 or F3 face.

[0133] 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 reflective prismatic film 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.

[0134] 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 transparent binder (organic, mineral or hybrid) preferably 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 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 200pm.

[0135] The glazing 100 cooperates with the structure of the roof of the vehicle (not shown in [Fig.l]), by means of a peripheral seal 8 allowing its sealed connection to be ensured 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 4, black in particular.

[0136] 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 14. 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 40mm, 30mm) from the first edge.

[0137] In each zone of the offset outer edge, the encapsulation extends between the outer edge and the first edge by the withdrawal of the interlayer edge 30 upstream of the first edge, for example by at most 2 mm here aligned with the outer edge. In practice, the interlayer edge 20 could be set back from the outer edge, for example by at most 10 mm, 5 mm, 3 mm. The relative position of the interlayer edge 20 with the outer edge can vary from one offset outer edge to another.

[0138] The light rays coming from one of the light sources 5, 5' guided in the sheet 2 and could exit from the second slice 20. But the presence in the withdrawal zone rl of the encapsulation (and even the opaque masking layer 4) serves as an optical barrier (partial or total), greatly reducing or even preventing any access of these light rays to the first slice in the withdrawal zone rl (and in the rounded zone).

[0139] Conventionally, for reasons of manufacturing the laminated bend, in at least 3 glazing edges, the second slice 20 is slightly set back from the first slice 10. For example, the distance r2 between the external slice 40 and the second slice 20 (extreme point of the second rounded slice) is at most 1 mm or 0.5 mm. And preferably for the method, the last edge of the second slice, called the reference edge, is aligned with the second slice. 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 the front edge of a roof (see [Fig.l]”).

[0140] [Fig. 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 an encapsulation. [Fig. 2] is a schematic view in perspective from below, that is to say from the inside of a vehicle, of the glazing of [Fig.2], (without the seal).

[0141] [Fig.2]”: is a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of [Fig.2], as a variant (without the seal).

[0142] The roof glazing 200 differs from the roof glazing 100 also in that the interlayer edge 30 is slightly set back from the outer edge 40, for example by at most 2 mm. 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 offset outer edge to the other.

[0143] The roof glazing 200 differs above all from the roof glazing 100 in that the second slice 20 is set back r2 from the external slice 40, for example by at most 5 mm or 3 mm, and aligned or even set back from the intermediate slice, for example by at most 5 mm or 3 mm. This reinforces the fight against light leakage.

[0144] Again, in at least 3 glazing edges, the second slice 20 is slightly set back from the first slice 10. For example, the distance r2 (here a setback) between the external slice 40 and the second slice 20 is at most 3 mm. And preferably for the method, the last edge 203 of the second slice, called the reference edge, is aligned with the edge 103 of the second slice. According to the invention, either the last edge is also set back (see [Fig.2]”) or it is a reference edge, for example the front edge of a roof (see [Fig.2]”).

[0145] The roof glazing 200 differs from the roof glazing 100 also in that the glazing 200 comprises an absorbing or reflecting layer or infrared 15 (solar control), on face F2 12 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 200 comprises an external electroconductive coating 16, 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 being arranged between dielectric layers.

[0146] [Fig. 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. [Fig. 3]' is a schematic perspective view from below, that is to say from the inside of a vehicle, of the glazing of [Fig. 3].

[0147] The roof glazing 300 differs from the previous roof glazing 200 by a higher shrinkage r2 of the second slice, for example 10mm or 5mm.

[0148] According to the invention, either the last edge 203 (front edge of a roof) is also set back (see [Fig.3]') from the edge 103 or it is a reference edge, for example the front edge of a roof (see [Fig.3]”).

[0149] [Fig.4] is 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.4]' is a schematic perspective view from below, i.e. from the inside of a vehicle, of the glazing of [Fig.4]. [Fig.4]” is a schematic perspective view from below, i.e. from the inside of a vehicle, of the glazing of [Fig.4] in a variant.

[0150] The roof glazing 400 differs from the roof glazing 200 in that the interlayer edge 30 is aligned with the first edge 10 (for 3 edges or for all edges 301 to 304). To provide an optical barrier, the encapsulation 81 is in the setback zone rl and even set back from the outer edge for at least three edges of the second edge 301, 302, 304.

[0151] According to the invention, either the last edge 203 (front edge of a roof) is also set back (see [Fig.4]') from the edge 103 or it is a reference edge, for example the front edge of a roof (see [Fig.4]”) aligned with the edge 103. In this case, it is possible to provide a local withdrawal of the PVB up to the external edge or a local peripheral opaque means such as those described below).

[0152] [Fig. 5] is 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. 5]' is a schematic perspective view from below, i.e. from the inside of a vehicle, of the glazing of [Fig. 5]. [Fig. 5]” is a schematic perspective view from below, i.e. from the inside of a vehicle, of the glazing of [Fig. 5] in a variant.

[0153] The roof glazing 500 differs from the previous roof glazing 400 by the addition of opaque peripheral means 9 at least in the zone rl and even in the rounding of the first slice 10, to reinforce the light barrier. Here it is a black PET polymer film for example of 80 pm or even an opaque ink on the main internal face of one of the two interlayer layers 31, 32. r'2 is the distance between the outer slice 90 and the outer slice 40 which can be substantially equal to the distance between the outer slice and the first slice. The inner slice 91 can be shaped between the two glass sheets 1, 2 under the masking layer 4. On three edges 301, 302, 304, the second rounded slice 40 is in the withdrawal zone rl and under the opaque element 9.

[0154] According to the invention, either the last edge 203 (front edge of a roof) is also set back (see [Fig.5]') from the edge 103 or it is a reference edge, for example the front edge of a roof (see [Fig.5]”).

[0155] [Fig.6] is a schematic and partial sectional view of an illuminable laminated vehicle glazing 600 in a sixth embodiment, in particular roof glazing with seal.

[0156] The roof glazing 600 differs from the previous roof glazing 500 by the choice of opaque peripheral means 9, which is here an opaque peripheral interlayer layer 3. The opaque internal edge 91 can be shaped between the two sheets of glass 1, 2, preferably set back from the internal edge 41 of the masking layer 4.

[0157] The second slice 20 is set back r'2 from the outer slice 90 of this opaque PVB 9 on 3 edges (with one aligned edge) or even all 4 edges.

[0158] The slice 30 (which is here the outer slice 90) can be aligned with the first slice.

[0159] [Fig.7] is a schematic and partial sectional view of an illuminable laminated vehicle glazing 700 in a seventh embodiment, in particular roof glazing with seal.

[0160] The roof glazing 600 differs from the roof glazing 300 by the opaque peripheral means 9 which complement the light barrier.

[0161] To do this, the interlayer slice 30 is extended beyond the second slice 20 and comprises on one of its main faces (for example oriented here face F3 or face F2) an opaque ink 9 (black and / or reflective, metallic, resin or mineral layer etc.), forming a peripheral frame on the 4 edges. The internal slice 91 of this ink 9 can be shaped between the two glass sheets 1, 2, preferably set back from the internal slice 41 of the masking layer 4.

[0162] According to the invention, either the last edge 203 (front edge of a roof) is also set back (see [Fig.5]') from the edge 103 or it is a reference edge, for example the front edge of a roof (see [Fig.5]”).

[0163] [Fig.8] is a schematic sectional view of an illuminable laminated vehicle glazing 800 in an eighth embodiment, in particular roof glazing.

[0164] This glazing 800, preferably rectangular and curved in one or more directions, comprises, from the outside to the inside:

[0165] - an outer glass sheet 1 which may be a 2.1mm Planiclear glass with an IR 15 reflective coating (silver stack), the whole having a TL of 71.8% (91% without the reflective coating),

[0166] - an inner transparent sheet 2, preferably made of mineral glass, here the same shape and dimensions as sheet 1, forming internal glazing, passenger compartment side, (by example a sheet of sodium-calcium silico glass, extra clear like the Diamant glass marketed by the company Saint-Gobain Glass with a TL of at least 91%, with a thickness equal to, for example, 2.9mm, glass with a refractive index of around 1.52 at 600nm or Optiwhite glass of 1.95mm, or Sunmax glass of 2.05mm), with here a base layer emissivity 16 based on ITO on the F4 face

[0167] - between face F2 and face F3, a transparent lamination interlayer 3, including here:

[0168] - 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), 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%.

[0169] - 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 alternatively tinted, for example gray tinted with TL at 27%,

[0170] - 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) in adhesive contact with the F2 side, clear or alternatively tinted, for example gray tinted with TL at 27%.

[0171] 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 pm. Alternatively, the inner interlayer 31 is based on crosslinked polymer adhesive material, in particular adhesive polyacrylate film.

[0172] The glazing 800 comprises the enamel masking layer 4 forming a masking frame delimiting a window clear 41 (daylight) here rectangular.

[0173] To optically isolate an inner part (with light guide and light extraction) and the tinted, absorbent outer part, the glazing 800 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 finishing during lamination). The interface between the two interlayers 31, 32 may be indistinguishable.

[0174] 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 0.4mm, an interlayer frame 34 of thickness 0.38mm, 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:

[0175] - a first support (PET of 125pm for example) with a first coating electroconductive (e.g. ITO) on the F2 side,

[0176] - an electro-active layer, based on liquid crystals in a polymer matrix (for example PDLC in English),

[0177] - a second support (PET of 125pm for example) with a second coating electroconductive (e.g. ITO) on the F3 side.

[0178] 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 of the PVB) for example by glued or contacting PET polymer strips.

[0179] Alternatively, the variable diffusion device is replaced by an electrochromic device or by a functional PET film (tinted, etc.) or by a photovoltaic device.

[0180] For the illumination function, the following are provided, masked from the outside by the masking layer 5:

[0181] - light-emitting diodes 5 (here with front emission) on a support (for example PCB) opposite (or offset) the F4 face,

[0182] - face side F3, a light redirection element 6, local, peripheral like a 6 prismatic reflective film.

[0183] 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.

[0184] 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 800. 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 point geometric patterns.

[0185] For this glazing 800, it is possible to choose an encapsulation with a removal of the interlayer slice and / or the second slice or even the said peripheral opaque element like those presented for the previous examples. 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.

[0186] As will be understood in light of the foregoing, the present invention provides an elegant and economical 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.

[0187] This solution can be implemented without substantial modification of the industrial tool for manufacturing this glazing.

[0188] 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

Claims

1. Illuminable laminated glazing for a vehicle (100 to 800), 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) facing 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 edge (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), the external edge is set back rl from the first edge on at least one first edge called the offset external edge (401 to 404),characterized in that it comprises a peripheral seal (8), which is an opaque polymeric encapsulation of the edge of the glazing, framing the laminated glazing, and in that in the zone of the offset external edge, between the external edge and the first edge, extends the encapsulation and / or a peripheral opaque element (9) linked to the lamination interlayer.,

2. Illuminatable laminated glazing for a vehicle according to claim 1 characterized in that the face Fb is offset from the withdrawal zone rl, under the masking layer or the face Fb is present in the withdrawal zone rl, opposite and separated from the face F2 by the encapsulation and / or said peripheral opaque element.

3. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that all the so-called offset external edges (401 to 404) of the external edge are set back rl from the first edge, in 2 or 3 offset external edge zones, the second edge is set back from the first edge or even aligned or set back r2 from the external edge, the encapsulation is opposite the face F2 by a setback of the interlayer edge relative to the first edge and / or by a setback of the second edge relative to the first edge, the encapsulation preferably extends to at least the external edge (40) and / or said peripheral opaque element (9) extending over the 2 or 3 zones of offset external edges, beyond the external edge and at most up to the first edge and in that in 1 or 2 zones of offset external edge (403), an edge, called reference (203), preferably front edge of a roof, the second edge is aligned with the first edge, the encapsulation is opposite the face F2 by a withdrawal of the interlayer edge relative to the first edge, the encapsulation preferably extends to at least the external edge (40) and / or the external edge of the peripheral opaque element (9) extends beyond the external edge and at most up to the first edge.

4. Illuminable laminated glazing for a vehicle according to one of the preceding claims, characterized in that all the so-called offset external edges (401 to 404) of the external edge being set back rl from the first edge, in 1, 2, 3 or 4 offset external edge zones, the encapsulation is opposite the face F2 by a withdrawal of the interlayer edge relative to the first edge and / or by a withdrawal of the second edge relative to the first edge, the encapsulation preferably extends to at least the external edge (40).

5. Illuminable laminated glazing for a vehicle according to one of the preceding claims, characterized in that all the so-called offset external edges (401 to 404) of the external edge are set back rl from the first edge, in 1, 2, 3 or 4 offset external edge zones, the encapsulation is opposite the face F2 by a setback of the second edge relative to the first edge, the encapsulation preferably extends to at least the external edge (40), the interlayer edge is aligned with the first edge.

6. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that all the so-called offset external edges (401 to 404) of the external edge are set back rl from the first edge, in 1, 2, 3 or 4 offset external edge zones, the encapsulation is opposite the face F2 by a setback of the interlayer edge, the encapsulation is between F2 and Fa preferably over at most 5mm and / or over at most the setback rl.

7. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that all the so-called offset external edges (401 to 404) of the external edge being in withdrawal rl of the first slice, in 1, 2, 3, 4 offset outer edge zones, the second slice protrudes from the outer slice, in particular set back from the first slice, said peripheral opaque element (9) extends beyond the outer slice towards the first slice and preferably with an outer slice (90) up to the first slice.

8. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that the first and second edges are rounded, rl is from the start of the rounded edge of the first edge, in particular the distance between the start of the rounded edge and the end of the rounded edge of the first edge is at most half the thickness of the outer sheet, in particular at most 1.5 mm or 1.2 mm.

9. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that the peripheral opaque element extends between the start of the rounded edge and the end of the rounded edge of the first edge and in particular the second edge, rounded, protrudes from the external edge towards the first edge.

10. Illuminatable laminated glazing for a vehicle according to one of the preceding claims, characterized in that in the or each offset external edge zone, the withdrawal rl is at most 5 mm, preferably from the start of a rounded edge of the first rounded edge.

11. Illuminatable laminated glazing for a vehicle according to any one of the preceding claims, characterized in that the masking layer (4) and / or the peripheral opaque element has an optical density of at least 2, and preferably at least 3, at least 4, at least 5.

12. Illuminatable laminated glazing for a vehicle according to any one of the preceding claims, characterized in that in the one or more offset outer edge zones, the peripheral opaque element (9) with an outer edge (90) preferably between the outer edge and the first edge, is in particular: - a film, in particular polymer, opaque in mass or opacified by an opaque coating, in the lamination interlayer (3) - an opaque coating on a main face of the lamination interlayer, in particular in contact with the face F2 or with the face Fa, - at least a fraction of opaque thickness of the lamination interlayer, in particular an opaque interlayer.

13. 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.

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) preferably arranged under the face Fb (14) and associated with a light redirection element (6), or with a hole wall of the inner sheet or a first light source (5) optically coupled to the second edge, 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. 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

16. - a functional film. Motor vehicle comprising an illuminable laminated glazing which is a roof, a side glazing, in particular a fixed glazing, a fixed glazed door, said illuminable laminated glazing being in accordance with any one of the preceding claims.

Images