Illuminable laminated glazed element for a vehicle, and vehicle comprising such an illuminable laminated glazed element

Abstract

The invention relates to an illuminable laminated glazed element (100) for a vehicle, with an optical isolator coating (5) on the rear face of a non-fluoropolymer transparent carrier film (5') within a lamination interlayer which comprises an upper interlayer (31), the carrier film having a haze value H1 which is in a range from 0.5% to 2%, and the glazed element further comprising a light redirecting element (8), referred to as an upper redirecting element, capable of redirecting light into the carrier film.

Description

Description Title of the invention: ILLUMINABLE LAMINATED GLASS ELEMENT FOR VEHICLES, VEHICLE WITH SUCH AN ILLUMINABLE LAMINATED GLASS ELEMENT

[0001] The present invention relates to an illuminable laminated glazing for vehicles, in particular road vehicle glazing.

[0002] It is known to have multifunctional road vehicle roofs that can be illuminated by lighting, for example, light-emitting diodes.

[0003] Regarding vehicle roof lighting, light-emitting diodes have been used for the glazed roofs of road vehicles, including panoramic laminated roofs with LED lighting as described in document WO2010049638. The light emitted by the diodes is introduced edge-on into the inner glazing forming a guide, the light being extracted from the glazing by a diffusing layer on the glazing.

[0004] To improve light extraction, document WO2015118279 proposes a luminous laminated vehicle roof incorporating within the thermoplastic laminate interlayer a fluoropolymer film with a thickness of at least 600nm, with a refractive index n2 at 550nm, the inner glass being a guide layer with a refractive index n1, n1-n2 being at least 0.08, the fluoropolymer film then forming an optical insulator between the inner glass and the outer glass.

[0005] The present invention sought to develop a laminated vehicle glazing, alternative and even opening up the range of applications.

[0006] To this end, the present invention relates to an illuminable laminated element for a vehicle, particularly a road vehicle (fixed or opening, such as a roof, side window, especially rear window, rear window, windshield, particularly for cars but also trucks, public transport such as buses, coaches, etc.), comprising: a laminated glazing, preferably curved, transparent (at least in a clear (central) window area), a first sheet (which may be curved), transparent, made of mineral glass (clear or tinted, particularly grey or green), intended to form the outer glass, with a first main face called face F1 (intended to be oriented towards the outside of the vehicle), a second opposite main face called face F2 (optionally coated with a transparent functional coating (in the clear window area)) and a first slice, (in particular a transparent functional coating with a thickness of at most 1 µm or 200 nm,for a road vehicle and even a car with a thickness preferably of no more than 4mm, or even of no more than 2.5mm, even of no more than 2.2mm - in particular 1.9mm, 1.8mm, 1.6mm and 1.4mm - and even of a thickness of at least 0.7mm, for example with a refractive index nv of at least 1.5 in the visible), the first sheet being intended to form the outer glass, a polymer laminate interlayer (transparent (at least in the clear part of the glass)) comprising an upper (adhesive) interlayer layer (F2 face side), in particular with a refractive index n3a in the visible, in adhesive contact with the second face F2 or with a functional transparent coating on the face F2 (in the clear part of the glass, in particular a functional transparent coating with a thickness of no more than 1 pm or 200nm) (and preferably a lower (adhesive) interlayer layer on the F3 face side), a second transparent sheet (which may be curved), made of mineral glass or polymer, with a third principal face F3 and a fourth principal face F4 opposite it (preferably bare or coated with a functional (transparent) coating) and a second slice with a visible refractive index n1 of at least 1.5, (in particular a functional coating with a thickness of at most 1 µm or 200 nm), the second sheet preferably made of mineral glass (clear and even extra-clear), the third face F3 facing outwards from the vehicle and the fourth face F4 facing into the passenger compartment, in particular with a thickness of at least 0.7 mm (to promote light guidance), possibly less than that of the first sheet of glass, even by at most 2.2 mm - in particular 1.9 mm, 1.8 mm, 1.6 mm and 1.4 mm - or even by at most 1.3 mm or at most 1 mm, the total thickness of the first and second sheets preferably being strictly less than 5 or 4mm, even at 3.7mm),and the glazed element comprising a transparent optical insulating layer, with a refractive index n2 in the visible, optical insulating layer of submillimeter thickness Ei and of at least 400nm, and it comprises a coated substrate which includes:, - a transparent film, called carrier film, made of a polymer, preferably thermoplastic, distinct from a fluoropolymer, with a main front face Fa oriented towards face F2 and an opposite main rear face Fb, of submillimeter thickness Ef, of at least 50 µm and preferably of at most 300 µm or 200 µm, the carrier film having a blur value H1 which is in a range from 0.5% to 2%, preferably of at most 1%, and preferably the carrier film having a refractive index n0 greater than n3a, or even preferably n0-n3a, of at least 0.1 in the visible, - the optical insulating layer, which is an optical insulating coating (made of a material comprising a matrix, preferably distinct from a fluoropolymer), on the rear face Fb, and a slice, n2 is less than n1, the difference in refractive indices n1-n2 being at least 0.06 in the visible range, the coated substrate being laminated between the second and third faces F2 and F3, and is between the upper interlayer and a lower interlayer (with a refractive index n3b in the visible range, in particular equal to n3a), in adhesive contact with the third face F3 or with a functional transparent coating on the face F3, in particular the coated substrate having a given surface S, preferably particularly for a fixed glazing (roof, side) completely occupying the view and extending beyond the view under a peripheral internal masking layer (preferably forming a peripheral frame for a fixed glazing) delimiting the view, and it comprises: - in particular at a first periphery of the coated substrate (near a first edge of the coated substrate), a light redirection element, called the upper (peripheral) redirection element, preferably offset from the viewable area, capable of redirecting light, preferably emitted from the side of face F4, into the carrier film via the front face Fa (so as to guide this light while diffusing light), the upper redirection element being a prismatic reflector element comprising reflector prisms oriented towards the second face F2 or towards the third face F3, preferably the upper redirection element at least partially on the front face Fa, against or glued to the front face F (bare or coated with a layer, for example transparent), - means of light extraction, in particular arranged locally or discontinuously, between the optical insulating coating and the F4 face, in particular comprising a diffusing coating.

[0007] Surprisingly, the inventors demonstrated that the blurring of the carrier film can provide a soft, even homogeneous, luminous background. The blurring must not be too pronounced in order to distribute the light across the surface and maintain guided rays as they move away from the injection point. In particular, a blurring value of no more than 2%, preferably no more than 1%, provides more homogeneous diffuse lighting, ideally across the entire surface and even the glass area. This also allows the desired level of visibility to be maintained outside when the film is off, especially in road vehicles. When the carrier film has a length of at least 40 cm in the direction of light propagation, the injection system can be duplicated by adding another upper redirecting element (and another primary light source) opposite the first edge, particularly for fixed glazing (roof, side window).

[0008] It is recalled that the level of diffusion of a substrate can be characterized by the value of the blur (or blur factor), measured in a known way by a blur measurement device (Haze in English), also called a "Haze meter".

[0009] According to one characteristic, the H1 blur of the carrier film is at most 1% and even at least 0.7%.

[0010] Preferably, the coated substrate has an edge that is masked from the outside of the glazed element (or even from the inside), in particular under a peripheral internal masking layer delimiting the view.

[0011] According to one characteristic, the coated substrate completely occupies a view of the glazed element, and preferably the coated substrate extending beyond the view under a peripheral masking layer delimiting the view, forming a peripheral frame in particular for fixed glazing or at least three peripheral bands in particular for side opening glazing.

[0012] The light transmission of the carrier film can be at least 80% or 85%.

[0013] The carrier film can be a polycrystalline film (to generate the blur).

[0014] The carrier film can be a thermoplastic polymer or even a cross-linked polymer, in particular: - polyester, such as polyethylene terephthalate (PET), poly(butylene terephthalate) (PBT), poly(ethylene naphthalate) (PEN), - polyimide, polyamide.

[0015] Preferably, the carrier film is a polyester film, or even PET, with an Ef value of no more than 300 µm, or even no more than 200 µm. PET is particularly clear. Its light transmission can be at least 80% or 85%.

[0016] The extraction means are arranged locally or discontinuously, for example, comprising one or more extraction patterns (discrete, geometric, etc.) that are disjoint or interconnected—grid-shaped, etc.—and an extraction layer with openings, notably forming a logo. In particular, the extraction means comprise a diffusing coating on the lower laminated interlayer or on the optical insulating coating, facing the carrier film (at the surface S of the carrier film), preferably having a coverage rate of at most 40% or 30% of the surface S, extraction means suitable for extracting guided light (by total internal reflection) particularly in the second leaf.

[0017] According to one feature, the optical insulating coating comprises a crosslinked polymer matrix with said index n2, preferably of no more than 1.42, matrix preferably among polyacrylate-based polymers with a fluorinated function, in particular urethane acrylate or fluorourethane acrylate or fluorosilicone acrylate and / or in that the optical insulating coating comprises a matrix with a refractive index n2 m greater than n2 and less than n1, and preferably with n2 m of at most 1.48 and n2 preferably of at most 1.42, and comprising (nano)porosity and / or (nano)particles of low index, of refractive index less than n1, in particular hollow, preferably of size of at most 300nm.

[0018] According to one characteristic, the matrix of the optical insulating coating is organic, in particular cross-linked polymer or thermoplastic, in particular chosen from polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, PVB, or the matrix is ​​mineral in particular silica.

[0019] According to one characteristic, the difference in refractive indices n1-n2 is at least 0.08 in the visible range. According to another characteristic, the thickness Ei is at least 500 nm, and even at least 800 nm.

[0020] According to one characteristic, the carrier film is set back from the first or second layer by at least 10mm, and in particular the thickness Ef of the carrier film is at least 0.2mm and the element includes an intermediate frame layer, framing the perimeter of the coated substrate and in particular between faces F2 and F3.

[0021] According to one characteristic, the glazed element includes another light redirection element called the lower redirection element, capable of redirecting light from the side of face F4 into the second sheet. The lower redirection element is transparent on the F4 side or reflective on the F3 side. In particular, the lower redirection element is reflective and optically coupled with a second light source, preferably distinct from the first light source, on the third face F3 side. In particular, the lower redirection element is a prismatic reflector element comprising reflector prisms oriented towards the third face F3 or towards the second face F2, or is a transparent light redirection element, on the fourth main face F4 side, possibly forming a deflector, a prism, or comprising (micro)prisms.

[0022] Depending on the configuration, the lower redirecting element is on the periphery of a so-called reference edge which is - the first edge, the lower redirecting element being opposite the rear face Fb (outside the injection zone of the first light source), against the face F3 and bonded to the face F3 by a local adhesive or the lower intercalated layer or against and bonded to the face Fb and on the optical insulating coating, - an edge adjacent or opposite to the first edge, the lower redirecting element being, - at least partially opposite the optical insulating coating, - or at most 4mm, preferably at most 1mm, from the optical insulating coating.

[0023] In a particular example, the glazed element includes another upper redirecting element at the periphery of an edge opposite the first edge capable of redirecting light, preferably emitted from the side of face F4, into the carrier film via the front face Fa (so as to guide the light while diffusing light), the upper redirecting element which is a prismatic reflecting element having reflecting prisms oriented towards the third face F3 or towards the second face F2, in particular upper redirecting element at least partially on the front face Fa, against or glued to the front face Fa,) and even another lower redirecting element at the periphery of an edge opposite the reference edge, capable of redirecting (for guidance) into the second sheet light coming from the side of face F4, the other lower redirecting element being transparent on the side of face F4 or reflective on the side of face F3.

[0024] In configuration a), the reflecting prisms of the upper redirecting element are wholly or partially offset from a first edge of the coated substrate, in particular from the longitudinal or lateral edge, specifically the reflecting prisms being in adhesive contact with the lamination interlayer. The reflecting prisms may be oriented towards the second face F2 or towards the third face F3. Depending on the orientation of the prisms, the upper redirecting element may be in adhesive contact with a lower interlayer layer or a peripheral laminate interlayer frame layer, or even with an upper or additional interlayer layer if an electrically controlled device is inserted into the laminated glass element.

[0025] In particular, the upper redirecting element is a prismatic film partially against or bonded to the front face Fa of the coated substrate, preferably by at least 2 mm, and the upper redirecting element protrudes from the first edge by at least 3 mm and preferably by no more than 10 mm. It is even preferable for another upper redirecting element to be present on the opposite edge.

[0026] In configuration b), and the reflecting prisms, are in a marginal area of ​​the coated substrate on the front face Fa, in particular along a longitudinal or lateral edge of the coated substrate, the optical insulating coating being absent from said marginal area.

[0027] The upper redirecting element is a prismatic film against or glued to the front face Fa of the coated substrate.

[0028] According to one characteristic, the upper redirecting element (like the lower redirecting element) is a prismatic film, possibly comprising a substrate and a textured layer or comprising a textured film.

[0029] The redirecting element (upper and / or lower) may include a prismatic (textured) film (with a smooth (non-textured, non-functional) main surface and a textured, functional opposite surface), flexible and therefore curved to adapt to the curvature of the laminated glass. In particular: - a partially structured transparent polymer film forming (micro)prisms - and with a reflective coating (metallic, silver, aluminum) forming a conforming deposit; - or a transparent (flat) polymer film, forming a substrate, with a main surface containing a transparent (polymer) layer with an arrangement of (micro)prisms and with a reflective coating forming a conforming deposit.

[0030] For example, a prismatic film comprises a transparent thermoplastic polymer film, for instance, made of polyethylene terephthalate (PET), onto which transparent prisms are formed from a polyacrylate (a resin crosslinked, for example, by UV). A partially textured layer is preferred. A metallic layer (conformal coating), for example, silver or aluminum, is added to the prismatic film. The transparent prismatic film preferably has a light transmission of at least 70%, more preferably at least 80%, and most preferably at least 90%.

[0031] The upper redirecting element, comprising a textured film (particularly a polymer or prismatic film) or a substrate film (particularly a polymer film and a textured or prismatic layer) and a reflective coating, can be bonded to the coated substrate (for the lower redirecting element, to the third face F3) directly or via at least one adhesive, or held in place by suction (strong interaction), notably by the pressure of the assembly. For example, the redirecting element is placed on its front face (the third face F3 for the lower redirecting element), and after the air is drawn in, a suction effect occurs.

[0032] The prisms of the lower and / or upper redirecting element can be at least 1 pm high and preferably at most 100 or 50 pm or 30 pm.

[0033] The film, in particular prismatic polymer or substrate of microprisms (prismatic layer, organic for example) can be less than 200pm, 100pm, 80pm or 50pm and even at least 30pm.

[0034] Preferably the prismatic film has a total thickness of at most 500pm or even 400pm or 200pm or 100pm.

[0035] Preferably, the upper and / or lower prismatic redirecting element (particularly one comprising a polymer film and prisms) is less than the width of an internal masking layer for a fixed glazing of at least 1 cm, and is of a similar length to that of the linear (custom-made) light source. It could be a rectangular strip with rounded corners, for example.

[0036] Microprisms (equipped with the reflective coating) act in particular as reflective prisms and reflect the light that strikes them in a direction that depends on the angle of inclination of the prism surfaces and the angle of incidence of the light on the prisms.

[0037] For example, a prismatic film consists of a transparent thermoplastic polymer film, for example, made of polyethylene terephthalate (PET), onto which transparent prisms are formed from a polyacrylate (a resin crosslinked, for example, by UV). A partially textured layer is preferred. For reflective prismatic films, a metallic layer (conformal coating), for example, silver or aluminum, is added.

[0038] The transparent prismatic film preferably has a light transmission of at least 70%, more preferably at least 80%, very preferably at least 90%.

[0039] Microprisms, for example, have a triangular cross-section. Prisms, for example, are joined together.

[0040] For example, the total thickness of the redirecting element (both lower and upper) is at most 100pm (specifically at least 30 or 50pm) and even at plus the thickness of the lower interlayer and / or the coated film (substrate).

[0041] In some embodiments, the reflecting prisms of the upper and / or lower prismatic reflecting element have an inclined face (redirecting, therefore receiving and redirecting light) forming an angle of 30° to 50° with the smooth face of the prismatic reflecting element (with the plane of the prismatic reflecting element). The inclined surfaces of the prisms are, in particular, formed in the micrometer range. The length of the inclined faces (in cross-section) of the prisms is, for example, preferably from 10 pm to 250 pm, and in particular preferably from 20 pm to 100 pm, for example approximately 30 pm. And / or the prisms may have a height of at least 1 pm and preferably of at most 100, 50, or 30 pm.

[0042] In a preferred embodiment of the invention, the upper and / or lower prismatic element is a flexible polymer (or metallic) film. The film, in particular the prismatic polymer or prism substrate (prismatic layer, organic for example), may be less than 200 µm, 100 µm, 80 µm, or 50 µm thick, and even at least 30 µm thick. If the reflective prisms are oriented towards the third face F3, the substrate film may be tinted and even opaque or opacified. For example, it may be a tinted or even opaque (black) PET supporting the reflective prisms. Preferably, the reflective prismatic element has a total thickness of at most 500 µm, or even 400 µm, 200 µm, or 100 µm, and even at least 30 µm.

[0043] In one embodiment of the invention, the upper and / or lower prismatic reflector element is a rigid (micro)textured plate, in particular made of glass or plastic with a reflective layer, or a metal plate, for example a (micro)textured aluminum plate.

[0044] The glazed element may be available with or without light sources. Depending on one characteristic, the glazed element includes - a first light source on the F4 face side, in particular a first set of light-emitting diodes, optically coupled to said upper redirecting element, in particular opposite the upper redirecting element, - possibly another first light source on the F4 face side, in particular another first set of light-emitting diodes, optically coupled to said other upper redirecting element, in particular opposite the other upper redirecting element, - possibly another second light source optically coupled to the second sheet of glass, in particular another second set of diodes, (another second light source opposite the second light source). - a second light source optically coupled to the second sheet of glass, in particular a second set of diodes, second light source on the side of the first edge, on an opposite edge or on an edge adjacent to the first edge.

[0045] The glazed element may include a first optical module carrying the first light source, or even the second light source. For example, the first optical module may be fixed to a peripheral seal, a profiled seal of the The glazing (polymer encapsulation, etc.) and / or the F4 face (excluding light injection zones) may be applied. The first optical module may have a face oriented towards the F4 face, which may be approximately horizontal. Two, three, or four optical modules are possible.

[0046] In one or more embodiments, the glazed element comprises the first (elongated) light source, in particular an array of light-emitting diodes (LED strip), preferably having a divergence of no more than 8°, positioned on the fourth principal face F4, for example facing the upper light redirection element. The light source (each LED) has a principal emission direction relative to a normal to the fourth principal face F4.

[0047] In an embodiment with the first light source and a prismatic film as the upper reflector, the angle of the principal emission direction of the light source (diodes) with the normal to the plane of the glazing (i.e., the angle of incidence) is preferably no more than 30° and even 25°, preferably with a divergence of no more than 8°. In particular, the principal emission direction with respect to a normal to the fourth principal face F4 emits a cone of light with an angle in the range of 22° ± 4°, or even in the range of 22° ± 2°. Preferably, a collimator can be inserted between the first light source and face F4. The first light source can be oblique to the plane of the glazing, to face F4. Reflecting prisms can have an inclined (redirecting) face with an angle of 35° to 50°, in particular 40° to 50° with the smooth face (opposite to the textured face).

[0048] In another embodiment with the first light source and a superior prismatic reflector film, the angle of the principal emission direction of the first light source with the normal to the plane (i.e., the angle of incidence) is preferably 0° ± 5°, preferably with a divergence of at most 8°. In particular, the principal emission direction with respect to a normal to the fourth principal face F4 emits a cone of light with angles in the range [0° ± 4°], or even [0° ± 2°]. Preferably, a collimator can be inserted between the first light source and face F4. The first light source can be (approximately) parallel to the plane of the glazing. The reflector prisms can have an inclined (redirecting) face with an angle of 30° to 40°, in particular 35° to 40°, with the smooth face.

[0049] Preferably, a collimator can be inserted between the first light source and the F4 face. In the simplest case, the collimator is a type of converging lens, with the first light source preferably positioned at its focal point. The collimator can be made of glass or transparent plastic, particularly polycarbonate (PC) or polymethyl methacrylate (PMMA). The collimator is preferably attached to an optical module carrying the first light source. If the first light source is designed as a (linear) arrangement of LEDs, a separate collimator can be provided for each LED. However, it is preferable to use a single collimator for all the LEDs. For example, in the case of a linear LED array, a strip-shaped collimator with a length at least equal to the length of the LED array can be used.The exit face of the collimator can be substantially horizontal.

[0050] According to one characteristic, the light extraction means comprise a diffusing coating, preferably transparent, with a binder and diffusing particles, the binder preferably having a refractive index n5 greater than or equal to n1 (or n3a), in particular of at least 1.48, in particular the lower interlayer or second sheet is the substrate of the diffusing coating, in particular possibly in contact with the optical insulating coating on the Fb face. In one example, the binder of the diffusing coating is organic, in particular a cross-linked polymer, selected from polymers based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, or polyurethane. In another example, the binder of the diffusing coating is a polyacrylate polymer, and the binder of the optical insulating coating is a polyacrylate polymer, in particular polyacrylate with a fluorinated function and / or with low-index nanoparticles or nanoporosity.

[0051] In a particular embodiment, the laminated glass element comprises, between the upper interlayer and the lower interlayer, above said optical insulating coating, an electro-controllable device, in particular with variable diffusion and / or tint, comprising an electroactive layer between a front electroconductive support on the second face F2 and a rear electroconductive support on the third face F3, or a photovoltaic device and preferably in that the lamination interlayer comprises an additional interlayer, the coated substrate being sandwiched between the additional interlayer and the lower interlayer.

[0052] According to one characteristic, at least the first sheet has an irregular lower longitudinal edge, close to a first edge of the coated substrate, with at least one first projecting portion referred to as the first overhang. The first light source, the lower redirecting element, and the second light source extend below the lower visibility limit of the laminated glass element, at a distance from a glazing fixing zone intended to be coupled to a window-lifting system, this fixing zone being connected to the first overhang. The laminated glass element is, in particular, a side-opening glazing unit.

[0053] In a particular example, the second sheet is of reduced size, the edge of the second sheet, called the second edge, is straight, in particular horizontal, and below the lower limit of visibility of the glazing, the second light source is under face F2 along the second edge for optical coupling by the second edge or the second sheet has a second irregular lower longitudinal edge having at least one protruding portion, called the second overhang, opposite said first overhang, the first light source or even the second light source is on face F4. The longitudinal source is more than 5cm from means of light extraction in the clear of the glazing.

[0054] Below the lower visibility limit, the "height" of the glazing can vary longitudinally between the rear and the front, this height being measured between the visibility limit and the lower longitudinal edge. For example, this height is at least 10 cm and at most 80 cm, or even 40 cm to maintain uniformity.

[0055] The irregular edge, for example, has a centrally curvilinear section forming a downward-oriented concave profile, and the fixing areas are peripheral.

[0056] The glazed element can be a roof or a side window, particularly an opening one (of a vehicle, especially a road vehicle). If the glazed element is an opening side window, any redirecting element and any light source must be below the visibility limit (lower limit). If the glazed element is a fixed side window or a roof, any redirecting element and any light source must be below the internal masking layer.

[0057] An opening side window is linked to a window regulator (for the vertical movement of said window relative to a door of said vehicle). A side window drive device is selectively controlled by means of a mechanism, such as a crank or a button, to move the window vertically relative to the door, respectively between a closed position and at least one open position.

[0058] To ensure the connection of a side window with the drive device housed in the door, a distinction is generally made between a first type of connection using a clamping assembly and a second type of connection using a screwing assembly.

[0059] In the case of a clamping connection, the connecting means include, for example, one or a pair of Y-shaped connecting pieces, also known as a glass holder, typically attached to the glazing by bonding. Each connecting piece (called a "holder") interacts with each of the glazing faces, internal and external respectively. This connecting piece is positioned near the lower edge below the lower limit of visibility, i.e., in the concealed area within the door, in order to connect the side glazing to the drive mechanism during movement.

[0060] In the case of a screw connection, the side glazing has at least one fixing area (protruding), in particular central, sometimes two (protruding) fixing areas depending on the glazing, in particular peripheral, which are made in the non-visible area located below the lower limit of visibility.

[0061] In laminated glazing used as side glazing, there is a particular type of glazing called "asymmetrical" which is characterized by the fact that at least the shorter inner pane of glass does not cover the other pane(s) of glazing at the fixing area.

[0062] Thus, an asymmetrical glazing unit has an inner pane of glass that is not traversed by any means of connection between the glazing and the drive mechanism, since this inner pane of glass has no fixing holes. The fixing area(s) have at least one fixing hole through the glazing. The fixing hole, opening onto both faces of the glazing, is designed to receive connecting means, these connecting means generally including a shaft connected to the drive mechanism, for example, a threaded rod. Consequently, from a mechanical standpoint, the inner pane of glass in such an asymmetrical glazing unit is connected to the drive mechanism only through the other panes of glass, that is, indirectly via the interlayer due to the assembly of the constituent panes of the laminated glazing.

[0063] To achieve this, the opening side glazing may have one or more holes partially or totally passing through the glazing, one or more attachment gutters or glass holders, one or more rails, or slides.

[0064] The opening side glazing may include at least one, and preferably at least two, glass doors having, for example, in cross-section, a shape substantially resembling an inverted U or even an inverted h. Parallel walls of the h shape enclose the glazing in its lower part, and a tail is then located substantially in line with the glazing.

[0065] This h-shaped glass carrier allows the transmission of forces between the glass carrier and the glass over a large area corresponding to the sum of the inner areas of the parallel walls; however, it is quite possible to use a simple plate, this plate having for example at least two parts: a first part for cooperation with the glass and a second part for cooperation with the glass drive mechanism (raising / lowering).

[0066] Since the glazing is curved, the parallel walls and / or the tail may be curved.

[0067] The glass carrier(s) is / are, for example, glued using an adhesive such as polyurethane, and then "fitted" onto the glazing, meaning it / they is / are positioned so that the glazing is present in the U-shape, either fully engaged or not, by inserting a plastic insert material, such as polypropylene, between the parallel walls and the glazing. Alternatively, an in-situ injection of adhesive material is proposed to form the insert material, which is a thermoplastic hot-melt resin, for example, based on polyamide. The glass carriers used are, for example, metallic, made of aluminum alloy.

[0068] For an opening side window, any redirecting element and any source of light are outside the visibility limit of the window (in the door, etc.).

[0069] Depending on one characteristic, the laminated glass element comprises at least one of the following functional elements: - an internal, peripheral, opaque masking layer between the second face F2 and the third face F3, and even covering the perimeter of the optical insulating coating and even the coated substrate, particularly in contact with the second face F2, defining a clear view, - an inner, peripheral, opaque masking layer on the fourth face F4, in particular congruent with or narrower than the width of the inner masking layer, - an internal peripheral opaque masking element, at the level of the upper redirecting element and / or a lower redirecting element (the substrate of the redirecting element is particularly opaque if the reflecting prisms are oriented towards the F3 face, or fixed with black glue, etc.), - an internal coating, reflecting infrared radiation, such as a stack of silver layer(s), on the second face F2 on the first, clear sheet, or on an additional film, particularly a polymer, - an external coating, reflecting infrared, such as a transparent conductive oxide layer stack, on the fourth face F4 of the second mineral glass sheet.

[0070] The upper redirecting element is for example at most 100 mm from the glass pane and / or preferably at least 10 or 20 mm.

[0071] The slice of the upper redirecting element can be at least 10mm away from the slice of the first leaf, and even by at least one of the values the following: 15mm, 20mm, 25mm, 30mm.

[0072] We prefer an internal opaque element of the same or similar color to the internal opaque masking layer (if any), especially black.

[0073] This opaque internal element, preferably black, is for example an enamel or an ink.

[0074] This internal opaque element may preferably have a light transmission of less than 5%, preferably even less than 2%, 1% or 0.5% or even zero.

[0075] An example of opaque PVB containing black pigments is the product called RB17830000 Vaneeva absolute black® sold by Saflex.

[0076] The laminated glass element (in particular the coated film) may include a protective transparent layer (film or coating), notably polymeric (thermoplastic or cross-linked polymer), with a refractive index greater than n2, a submillimeter thickness, and even a maximum of 100 µm, covering the optical insulating coating in contact with the lower interlayer and even with a diffusing coating forming a light extraction mechanism. In particular, it protects the optical insulating coating containing (nano)porosity and / or low-index (nano)particles, especially hollow or porous ones (silica, etc.). The protective transparent layer provides mechanical protection in contact with the lower interlayer and even with a functional diffusing coating, forming the light extraction mechanism (discontinuous or localized).

[0077] Preferably, the light extraction means occupy no more than 50% or 40% of the glazing (roof, side glazing, etc.), or the clear glass area, or the lower interlayer. For example, the light extraction means (such as a diffusing coating) are on face F3 or the F3 side of the lower thermoplastic (PVB) interlayer and preferably occupy no more than 40% or 30% of the roof, or the clear glass area, or the lower interlayer.

[0078] According to one characteristic, the illuminated laminated vehicle glass element comprises (in particular on the outer face of the second sheet, on the fourth face F4) a transparent, single-layer or multi-layer infrared-reflective coating (low emissivity); the infrared-reflective coating comprises at least one electrically conductive functional layer, for example, of a transparent conductive oxide, in particular ITO. The infrared-reflective coating preferably comprises a dielectric sublayer, in particular silicon (oxy)nitride, and preferably a dielectric toplayer, in particular silicon (oxy)nitride.

[0079] According to one characteristic, the vehicle's illuminated laminated glass element has an internal (electroconductive) coating that reflects infrared radiation (solar control), such as a stack of silver layer(s), on the second face F2 and covering the entire view on the first sheet or on an additional film, in particular a polymer.

[0080] According to a characteristic comprising between the upper and lower interlayer layers, above said optical insulating coating, an electrically controllable device, in particular with variable diffusion and / or tint, comprising an electroactive layer between an electroconductive support front side second face F2 and a rear electroconductive support on the third face F3, or a photovoltaic device and preferably in that the laminate interlayer has an additional interlayer, the coated substrate being sandwiched between the additional interlayer and the lower interlayer.

[0081] According to one characteristic, an electro-controllable device is a liquid crystal cell preferably incorporating dichroic dyes or is an electrochromic layer, in particular the liquid crystal cell is a host-guest cell called "GHLC" (for "Guest-Host Liquid Crystal" in English) or a polymer-based cell such as a PDLC cell (for "Polymer-Dispersed Liquid Crystal" in English), or a PNLC cell (for "Polymer Network Liquid Crystal" in English) or a PSLC cell (for "Polymer stabilized liquid crystal" or a DDPDLC cell (for "Dye-Doped Polymer-Dispersed Liquid Crystal" in English).

[0082] A DDPDLC cell exhibits a discontinuous phase of microscopic liquid crystal (LC) droplets within the continuous polymer matrix phase. The shapes, sizes, and distribution of these droplets depend on numerous physicochemical parameters (and the phase separation method used). When switched off, the DDPDLC scatters light due to the presence of microdroplets with a refractive index different from that of the polymer matrix. The DDPDLC also absorbs light due to the presence of dichroic dyes in the LC phase. The combination of these two properties results in a dark and hazy (opaque) appearance.When illuminated, the dyes and LCs are oriented perpendicular to the film plane, and therefore the light is not (or only slightly) scattered. The refractive index matches that of the polymer matrix, and the absorption cross-section is low, resulting in a transparent and clear appearance. Examples of DDPDLC cells are described in patent application CN 117567875.

[0083] A liquid crystal cell called a guest host cell (or GH for "guest host" in English), with variable color (light to dark state and vice versa), has an electroactive layer comprising a liquid volume of liquid crystals mixed with dichroic (dissolved) dyes, electroactive layer between a support, in particular dielectric and transparent, upper (electrode) comprising an upper electrode in particular transparent, surmounted by an upper alignment layer and a lower (electrode) support in particular dielectric and transparent comprising a lower electrode in particular transparent surmounted by a lower alignment layer, the electroactive layer being between the lower and upper alignment layers, the lower support being closer to the F3 face than the upper support, in particular the guest host cell being surrounded by an intercalated laminated frame layer (based on PVB).A host-guest cell is advantageous because it has a very fast switching time, a strong contrast between light and dark states, low blur, and a color that can be neutral.

[0084] According to one characteristic, a guest host cell has an internal polymer seal, preferably no more than 1 cm wide, between the lower support and the upper upper port and surrounding the electroactive layer, in the visible part of the glazing in the mounted position, the glazing includes means for masking the outside of the first edge and the internal seal, and even the other second edge of the optical insulating coating, called external masking means, and preferably the glazing includes means for masking the inside of the first edge and the internal seal, and even the other second edge of the optical insulating coating, called internal masking means, preferably the external masking means include a peripheral internal masking layer, which is: - a coating on face F2, in particular enamel, or a coating on the upper interlayer, - or an opaque interlayer abutted with the upper, so-called short, interlayer, set back from the first layer, - and preferably the internal masking methods include a peripheral internal masking layer which is: - (excluding any light injection zone) a coating, on face F3 or F4, in particular enamel, or a coating on an intermediate layer of laminate under the lower support, in particular on a lower intermediate layer or an additional intermediate layer between the lower intermediate layer and the lower support or on an intermediate frame layer, - or an opaque interlayer of the lamination interlayer, under the lower support, in particular an additional interlayer between the lower interlayer and the lower support or on an interlayer frame layer.

[0085] The electrically controlled device can have variable color.

[0086] The electrically controllable device, in particular for a roof or opening side glazing, can be segmented at least in the clear glass, into several cell regions by at least one electrical discontinuity, in particular of submillimeter width, formed in one of the upper or lower electrodes, in particular obtained by laser, each cell region having an electrical supply.

[0087] The electrically controlled device (segmented or not, single liquid crystal cell or sub-cells) can cover at least 90% or 95% or 100% of the clear glass and even extends beyond.

[0088] In one embodiment, the laminated glazing element is a side glazing, in particular opening, the internal joint and the other second edge having a lower longitudinal border below the lower limit of visibility of the glazing, and the peripheral internal masking layer includes an upper longitudinal masking strip, in particular horizontal or even one or more internal lateral masking strips, and preferably the peripheral internal masking layer includes another upper longitudinal masking strip or even one or more internal lateral masking strips.

[0089] The invention also relates to a vehicle, particularly a road vehicle, incorporating the aforementioned illuminated laminated glass element of the invention. Specifically, the vehicle includes a door housing the aforementioned illuminated laminated glass element of the invention as a side window, particularly one that opens at the rear. The present invention is now described using examples only. illustrative and in no way limiting of the scope of the invention, and based on the attached illustrations, in which: - [Fig. 1] shows a schematic cross-sectional view of an illuminable laminated glass element 100, in particular a motor vehicle roof according to the invention in a first embodiment. Figure 1 also shows a detailed view of the lower redirecting element used to redirect the light and fixed to face F3 on the second glass substrate. - [Fig. 1a] represents a schematic front view of the roof of figure 1. - [Fig. 1b] schematically illustrates the propagation of light via the upper redirecting element - [Fig. 1c] schematically illustrates the propagation of light via the lower redirecting element. - [Fig. 1'] represents a detailed view of an example of prismatic reflector film then used to redirect light. - [Fig. 2] represents a schematic cross-sectional view of an illuminable laminated glass element 200 of a motor vehicle in a second embodiment which is schematically shown in front view in figure 2a. - [Fig. 2'] represents a schematic longitudinal cross-sectional view of the illuminable laminated glass element 200 of the second embodiment. - [Fig. 2a] represents a schematic front view of the illuminable laminated glass element 200 of the second embodiment. - [Fig. 3] represents a schematic longitudinal sectional view of an illuminable laminated glass element 300 of a motor vehicle in a third embodiment. - [Fig. 3'] represents a schematic cross-sectional view of the 300 illuminateable laminated glass element of the motor vehicle of the third embodiment. - [Fig. 3a] represents a detailed view and a positioning variant relative to figure 3' of the lower redirecting element of the illuminable laminated glass element 300 of the third embodiment. - [Fig. 4] shows a schematic cross-sectional view of a 400 laminated glass element for a motor vehicle in a fourth embodiment. Figure 4 also shows a detailed view of a mounting variant for the lower redirecting element used to redirect light and fixed to the rear face of the coated substrate. - [Fig. 5] represents a schematic cross-sectional view of a 500 laminated glass element of a motor vehicle in a fifth embodiment. - [Fig. 6] represents a schematic cross-sectional view of a 600 laminated glass element of a motor vehicle in a sixth embodiment. - [Fig. 6'] represents a variant of the laminated glass element of figure 6. - [Fig. 7] represents a schematic cross-sectional view of a 700 laminated glass element of a motor vehicle in a seventh embodiment. - [Fig. 8] represents a schematic cross-sectional view of a laminated glass element 800 of a motor vehicle in an eighth embodiment. - [Fig. 9] represents a schematic cross-sectional view of a 900 laminated glass element of a road vehicle according to the invention in a ninth embodiment. - [Fig. 10] represents a schematic cross-sectional view of a 1000 laminated glass element forming an illuminable opening side window of a road vehicle according to the invention in a tenth embodiment. - [Fig. 10a], [Fig. 10b], [Fig. 10c] and [Fig. 10d] each represent a schematic front view of an example of side opening glazing with the laminated glazing element similar to that of figure 10. - [Fig. 11] represents a schematic cross-sectional view of a laminated glass element 1100 forming a fixed illuminable side window of a road vehicle according to the invention in an eleventh embodiment. - [Fig. 11a] and [Fig. 11b] each represent a schematic front view of an example of side glazing with the laminated glass element similar to that of figure 11. - [Fig. 12] represents a schematic cross-sectional view of an illuminable laminated glass element 1200 of a road vehicle according to the invention in a twelfth embodiment - [Fig. 13] represents a schematic cross-sectional view of an illuminable laminated glass element 1300 of a road vehicle according to the invention in a thirteenth embodiment - [Fig. 14] represents a schematic cross-sectional view of an illuminable laminated glass element 1400 of a road vehicle according to the invention in a fourteenth embodiment.

[0090] It should be noted that, for the sake of clarity, the different elements of the objects represented are not necessarily reproduced to scale.

[0091] Figure 1 shows a schematic cross-sectional view (here lateral AA) of an illuminable laminated glass element 100 of a vehicle according to the invention, such as a luminous laminated vehicle roof schematically illustrated in front view in Figure 1a, in a first embodiment. In particular, for a fixed roof (canopy), the width is 85 cm to 1.4 m and the length is 75 cm to 1.65 m.

[0092] This is a vehicle-illuminable laminated element, 100, rectangular and curved (in one or more directions), which includes a laminated glazing 1, preferably curved, transparent (at least in a clear (central) window) comprising: a first sheet of glass 1 intended to form the outer glass, for example rectangular (with dimensions 1600X1100 mm for example), with a tinted composition (VENUS VG10 or TSA 4+ glass marketed by the company Saint-Gobain Glass with a light transmission or TL of about 28%) for example of a thickness of 2.1 mm, with a first main face 11 corresponding to face F1, a second main face 12 called face F2 and an edge (longitudinal slices 10 and 10'), face F2 being coated possibly with a transparent functional coating (heating, etc.) or even face F1, a second transparent sheet, preferably mineral glass, 2, here of the same shape and dimensions as the first sheet 1, forming internal glazing, passenger compartment side, presenting a third main face 13 or face F3 and a fourth main face 14 or face F4, and an edge (longitudinal slices 20 and 20') - for example a sheet of silicosodocalcic glass, extra clear like Diamant glass marketed by the company Saint-Gobain Glass of TL of at least 91%, of thickness equal for example to 2.9 mm, index glass. refractive index n1 of the order of 1.52 at 600nm or Optiwhite glass of 1.95mm, or Sunmax glass of 2.05mm, between face F2 and face F3, a transparent laminated interlayer 3, with a longitudinal edge 30 here aligned or possibly offset from the longitudinal edges 10, 10' towards the center of the glass (therefore recessed), here comprising: - an upper interlayer 31, in particular thermoplastic, here based on PVB (with plasticizers, at least 30% by weight), in particular of 0.38mm or 0.76mm (in one or two sheets), of refractive index n3a in the visible, clear or in a tinted variant, for example tinted grey of TL at 27%, in adhesive contact with the face F2 or with a functional transparent coating on the face F2 (in the clear glass in particular a functional transparent coating of thickness of at most 1 pm or 200nm), - a lower interlayer 32 of PVB (for example with plasticizers, at least 10% by weight), clear (as transparent as possible and with as few optical defects as possible), for example 0.38mm or 0.76mm (in one or two sheets) in adhesive contact with face F3, with a refractive index n3 of about 1.48 at 600nm, for example PVB with a TL of at least 90%.

[0093] The upper adhesive polymer interlayer 31 is preferably PVB-based. Alternatively, the upper interlayer 31 is based on a cross-linked polymer adhesive (OCA), for example, polyacrylate. Preferably, the upper interlayer 31 has a thickness of no more than 0.76 mm.

[0094] The lower interlayer 32, a polymeric adhesive, is preferably PVB-based, for example, Eastmann PVB RK11. Alternatively, the lower interlayer 32 is based on a cross-linked polymer adhesive (OCA), for example, polyacrylate. Preferably, the lower interlayer 32 has a thickness of no more than 0.76 mm.

[0095] Alternatively, the lower interlayer 32 is based on clear PVB with little or no plasticizers (for example less than 10% by weight of plasticizers such as Eastmann's PVB RM 11 or even less than 5% by weight, in particular Kuraray SkyViera film or Optical grade Thin Film for example with a thickness of no more than 25 pm.

[0096] Examples of gray-tinted PVB (in various shades of gray), such as the upper interlayer 31, and some PVBs also possessing acoustic properties, include the commercial products listed in Table 1 below. Table 1 shows the L, a*, and b* values ​​of laminated glazing with PVB sandwiched between two 2.1 mm sheets of Saint-Gobain Planilux glass, as well as the TL value of such glazing. [Table 1]

[0097] Laminated glazing may include an IR-reflective coating on face 14, face F4, forming a low-emissivity layer (as reference 16 in Figure 6). The transparent, single-layer or multi-layer IR-reflective coating comprises at least one electrically conductive functional layer, for example, of a transparent conductive oxide, in particular ITO. The IR-reflective coating preferably comprises a dielectric sublayer, in particular silicon (oxy)nitride, and preferably a dielectric toplayer, in particular silicon (oxy)nitride.

[0098] Furthermore, the laminated glazed element (roof) 100 has a peripheral internal masking layer 7 forming a masking frame that delimits a glazed area 70 (daylight), here rectangular (see Figure 1a) with straight edges. Any local modification of the edges 70 is possible (gradient of points, wider area, etc.). For example, the internal masking layer 7 is: - a black enamel on face F2, - or a black ink, on one of the faces of the upper intercalated layer 31 preferably the face oriented towards the face F2, ink preferably based on PVB with black pigments if upper intercalated layer 31 PVB; - the masking width at the front (front lateral edge side 10a) is, for example, from 10 to 40cm, - the masking width at the rear (rear side edge 10b) is, for example, from 5 to 25cm, - the masking width on the long sides (longitudinal edges) is for example 5 to 20cm, identical or different width for the two long sides.

[0099] To optically isolate a lower portion (with light guide and light extraction) from the tinted, absorbent upper portion, the laminated glazing element (the roof) 100 further comprises an optical insulating coating 5 on a transparent film 5' called the carrier film. The entire optical insulating coating 5 and the carrier film 5' are referred to as the coated substrate. The carrier film 5' has a front face 5T and a rear face 52'. The carrier film 5' has a length in the direction of light propagation of at least 40 cm, defined along a propagation axis X. The optical insulating coating 5 is on the rear face Fb 52' (side face F3) of the carrier film 5'. The rear face of the carrier film, including the optical insulating coating 5, is called the coated (or deposition) face. The coated substrate is located between the second and third faces F2 and F3, specifically sandwiched between the upper interlayer 31 and the lower interlayer 32.The coated substrate extends throughout the clear glass and beyond, with the second 50' section and the other second 50' section being under the masking layer 7.

[0100] The coated substrate is set back from the edges 10, 10', 20, 20' of the sheets 1, 2 by at least 10 mm. The coated substrate has a given surface area S. The carrier film, and indeed the coated substrate itself, is less than 200 µm thick, or at most 100 µm, and is protected at its periphery by one or both of the lower and upper interlayers 31, 32 (preventing creep during lamination). If the upper interlayer is light-colored, the interface between the two lower and upper interlayers 31, 32 may be indistinguishable.

[0101] The 5' carrier film is preferably made of polymer and is distinct from a fluoropolymer and even from an optically cross-linked adhesive (OCA). The 5' carrier film is transparent and clear.

[0102] The optical insulating coating 5 is made of a material, preferably a polymer, comprising a separate matrix of a fluoropolymer (or even a cross-linked adhesive) with a submillimeter thickness Ei, at least 400 nm and preferably 500 nm or 800 nm, and a second layer 50, possibly recessed from the layer 50' of the carrier film 5' without compromising the optical insulating function. The optical insulating coating may be applied directly or on a functional sublayer (barrier, etc.), transparent to the carrier film 5'.

[0103] Optical insulating coating 5 is transparent, and even as transparent as possible.

[0104] The optical insulating coating 5 is in a material comprising a matrix distinct from a fluoropolymer.

[0105] The optical insulating coating 5 has a refractive index n2 in the visible and with n1-n2 which is at least 0.04 in the visible and even at least 0.08 or 0.13, of submillimeter thickness Ei of at least 400nm and even 500nm, and even at least 800nm.

[0106] In one configuration, the optical insulating coating 5 comprises a crosslinked polymer matrix with said n2 index, preferably of at most 1.42 and even of at least 1.35, the matrix preferably being among polyacrylate-based polymers with a fluorinated function, in particular urethane acrylate, fluorourethane acrylate, or fluorosilicone acrylate. The thickness is preferably at most 10 µm, 5 µm, or 2 µm and at least 800 nm.

[0107] In one configuration, the optical insulating coating 5 comprises a matrix with a refractive index n2 m greater than n2 and less than n1, and preferably with n2 mof at most 1.48 (and preferably n2 of at most 1.42 and even at least 1.35), and comprising (nano)porosity and / or low-index and / or porous, hollow (nano)particles with a refractive index lower than n1, particularly hollow particles with a size of at most 300 nm or even 100 nm, for example hollow silica nanoparticles. The thickness is preferably at most 10 pm or 5 pm and at least 800 nm.

[0108] The matrix is ​​a cross-linked or thermoplastic polymer, specifically chosen from polymers based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, PVB, or minerals, particularly silica. Polyacrylate, polyurethane, or even polyepoxide, polyvinyl acetate, and polyester polymer matrices are preferred.

[0109] The optical insulating coating 5 may include a protective transparent layer, with a refractive index greater than n2, and a thickness of submillimeters and even up to 100pm. This protective transparent layer covers the optical insulating coating in contact with the lower interlayer 32 and even with the extraction means 6.

[0110] Alternatively, coating 5 is porous silica. [OR I] To avoid creases and undulations, the coated substrate should preferably be located in a roof area with a curvature, a limited sphericity, particularly with a radius of curvature of at least 1.5 m. For example, the second layer 50 can be sufficiently far from the layer of sheets 1 and 2. The masking width on the sides and / or front and rear can be adjusted (increased) for this purpose.

[0112] For example the 5' carrier film is a clear PET of less than 200pm (protected by creep of the upper interlayer 31) in particular of 100pm or 75pm, with a TL of about 90% or more.

[0113] The 5' carrier film has a blur value H1 which is in a range of 0.5% to 2%, preferably is at most 1% and even at least 0.7%, and the carrier film has a refractive index n0 preferably greater than n3a even preferably n0-n3 of at least 0.1.

[0114] To illuminate the laminated glass element 100, it further comprises, towards its first edge, a first light source on face F4, in particular a first set 4 of light-emitting diodes on their support 40, preferably each having a divergence of no more than 8°, and a second light source 4', in particular a second set of diodes, on face F4, on their support 40', preferably each having a divergence of no more than 8°. The light sources are masked from the outside by the internal masking layer 7.

[0115] In particular, the laminated glass element 100 comprises, in a manner masked from the outside by the internal masking layer 7: - at a first periphery of the coated substrate 5, 5', a light redirection element 8, called the upper redirection element, capable of redirecting light, here emitted from the side of face F4, into the carrier film 5' via the front face Fa, - another light redirection element 8' called lower redirection element, capable of redirecting into the second sheet 2 a light emitted here from the side of face F4, the lower redirection element 8' being here a reflector on face F3 or in variant transparent on face F4, light-emitting diodes 4 (here front-emitting) on ​​a support 40 (for example PCB) opposite (or offset) the fourth main face 14 (face F4), with a series of diodes optically coupled to said upper redirection element 8, in particular opposite the upper redirection element, and another series of diodes 4' on a support 40' (for example PCB) optically coupled to said lower redirection element 8', in particular opposite the lower redirection element.

[0116] The description given above or below regarding the upper redirector element 8 applies to the lower redirector element 8'.

[0117] The lower redirecting element and even the second light source 4' is preferably all or part offset from said upper redirecting element 8 (at least from the so-called illuminated part), more towards the center of the glazing than the upper redirecting element 8 (and even than the first light source 4).

[0118] In particular, the luminance is on the order of 1 cd / m 2 The homogeneous luminous background, thanks to the blur of the carrier film, can provide a curtain effect, preserving privacy.

[0119] The lighting system can be doubled (particularly for the example of the roof in Figures 1 and 1a) by adding, on the opposite side of the first edge, along the longitudinal edges 10' and 20' of the glazed element, a second set of LEDs 4, optically coupled to another upper redirecting element 8, specifically opposite said other upper redirecting element, and a second set of LEDs 4', optically coupled to another lower redirecting element 8', specifically opposite said other lower redirecting element. The longitudinal edges 10 and 10' of the glazed element are not necessarily parallel.

[0120] Diodes can also be placed on the front or rear side edges.

[0121] Furthermore, the glazed element includes light extraction means 6, which, for example, comprise a diffusing coating, preferably transparent, with a binder and diffusing particles, the binder preferably having a refractive index n5 greater than or equal to n1, in particular at least 1.48. Specifically, the substrate of the diffusing coating is the lower interlayer 32, the second sheet 2, or the optical insulating coating. The extraction means 6 face the surface S of the coated substrate. The extraction means 6 are arranged in the view window between the lower redirecting elements 8'. The extraction means 6 are here on the lower interlayer 32 on the F3 face side, and / or the second sheet 2 is the substrate of the diffusing coating. In the variant shown in Figure 5, the extraction means 6 are in contact with the optical insulating coating on the Fb face.

[0122] The upper redirecting element 8 is a prismatic reflecting element comprising reflecting prisms oriented here 1 towards the second face F2 or towards the third face F3. The reflecting prisms, in particular the illuminated portion receiving said light from the first source 4, are offset from the first edge of the coated substrate of the first periphery, in particular from the longitudinal (or lateral) edge, specifically the reflecting prisms being in adhesive contact with the upper interlayer 31 of the laminate. A portion of the reflecting prisms on the front face 51 is preferably outside the light injection zone.

[0123] In Figure 1, the upper redirecting element 8 is therefore arranged at least partially against or bonded to the front face Fa of the carrier film 5'. The upper redirecting element is arranged against the front face Fa (covering the carrier film 5') for at least 2 mm and protrudes from the first edge of the carrier film by at least 3 mm and preferably by no more than 10 mm. The total thickness of the upper redirecting element is in particular no more than 100 µm (specifically at least 30 or 50 µm).

[0124] In Figure 1, the lower redirector element 8' is located at the periphery of a so-called reference edge, which is the first edge of the coated substrate. The lower redirector element 8' is, for example, entirely opposite the rear face Fb of the coated substrate. The lower redirector element 8' is at most 4 mm from the rear face of the coated substrate, preferably at most 1 mm. In Figure 1, the lower redirector element 8' is against face F3 and connected to face F3 by a local adhesive or by the lower intercalated layer 32. The lower redirecting element 8' is at most 3 mm from the first edge of the coated substrate. The total thickness of the lower redirecting element 8' is in particular at most 100 µm (in particular at least 30 or 50 µm).

[0125] The lower redirecting element 8' is a prismatic reflecting element comprising reflecting prisms oriented towards the second face F2 as in Figure 1, or towards the third face F3 (as in Figure 6), or is a transparent light redirecting element, on the fourth main face F4 side (possibly forming a deflector, macroprism or comprising (micro)prisms).

[0126] Alternatively, the lower redirecting element 8' can be bonded to the rear face 52 of the optical insulating coating 5, with the prisms oriented towards face F2, as illustrated in the detail view of Figure T, or with the prisms oriented towards face F3 as illustrated in Figure 3a. In Figure T, the adhesive 60 used to fix the lower redirecting element 8' is opaque (e.g., black) to constitute an opaque inner element equivalent to the inner masking element 7' described later and always under the inner masking layer 7 (especially for a fixed side glazing such as a roof).

[0127] For example, each of the reflective prismatic elements 8, 8' is a polymer prismatic film, as shown in detail in Figure 1 with: - a flat part 81 (substrate for example PET of at most 100µm) glued to the coated substrate, - and a textured layer (by embossing etc.), partially or even fully textured, forming prisms 82 which become reflectors by a reflective layer 83 for example metallic (by conformal deposition on the prismatic textured surface).

[0128] The microprisms are schematically represented in cross-section as right triangles, but the angle of inclination of the inclined faces of the prisms with the mean plane of the reflective prismatic film can be adjusted to better redirect the light. Similarly, the principal direction of emission from the light source can be adjusted. A collimator can be added between face F4 and the diodes.

[0129] In a first embodiment (Figure 1), the angle of the principal emission direction of the light source 4 or 4' with the normal to the plane (i.e., the angle of incidence) is preferably no more than 30°, preferably with a divergence of no more than 8°. In particular, the principal emission direction with respect to a normal to the fourth principal face F4 emits a cone of light with angles within the range of 22° ± 4°, or even within the range of 22° ± 2°. Preferably, a collimator can be inserted between the light source and face F4 14. The PCB support 40 or 40' can be oblique to the plane of the glazing. The inclined face of the reflecting prisms (receiving and redirecting the light) can form an angle of 35° to 50°, in particular 40° to 50°, with the mean plane of the reflecting prismatic film (or even the glazing).

[0130] In another embodiment, the angle of the principal emission direction of the light source 4 or 4' with the normal to the plane (i.e., the angle of incidence) is preferably 0° ± 5°, preferably with a divergence of at most 8°. In particular, the principal emission direction with respect to a normal to the fourth principal face F4 emits a cone of light with angles within the interval [0° ± 4°], or even [0° ± 2°]. Preferably, a collimator can be inserted between the light source and the F4 14 face. The PCB 40 or 40' support can be parallel to the plane of the glazing. The inclined face of the reflecting prisms can form an angle with the mean plane of the reflecting prismatic film (or even the glazing) of 30° to 40°, particularly 35° to 40°.

[0131] For example, the reflective prismatic film comprises a transparent thermoplastic film, for example based on polyethylene terephthalate (PET), on which transparent prisms are formed from a polyacrylate (reinforced resin, for example by UV) and a metallic layer (conformal deposit) to form the reflective prisms.

[0132] In another example, a transparent prismatic film 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).

[0133] The redirecting element 8, like 8', forms a longitudinal band, for example schematically represented in figure 1a as the two series of linear type light sources 4 and 4' along a longitudinal edge of the roof.

[0134] Alternatively, the prismatic film 81, 82 is a monolithic polymer film, for example preformed, and the reflective layer 83 is applied.

[0135] The diodes and / or their support can be fixed to face F4 (by an additional part, etc.). Alternatively, the diodes are side-emitting (figures 13 and 14).

[0136] The extraction methods 6 are, for example, here extended or point geometric patterns, in particular with a width of no more than 10mm to avoid the shading phenomenon.

[0137] For example the distance between the extraction means extraction 6 and the diodes (or the lower prismatic film 8') is at least 10mm or 40mm.

[0138] For example, the extraction methods include a diffusing coating (a network of disjointed and / or interconnected patterns) in contact with face F3 and covering at most 40% of the clear glass area to promote adhesion with the second sheet 2. The diffusing coating is deposited on face F3 (for example, an enamel, a transparent ink) or on the main face of the lower PVB 32 layer oriented towards face F3. The diffusing coating 6 is polymeric or mineral and is deposited by liquid means (by inkjet, screen printing, etc.).

[0139] For example, the diffusing coating is on face F3, for example with an acrylate matrix, preferably with a refractive index greater than or equal to n1, with TiO2 particles at least 100 nm in diameter and preferably no more than 1 pm or 400 nm in diameter. It is 10 pm to 100 pm or even 50 pm thick. The diffusing coating (for example, based on PVB with TiO2 particles 100 to 200 nm in diameter) is alternatively deposited on the PVB face oriented towards face F3.

[0140] For example, the diffusing coating (disjoint and / or interconnected pattern network) in contact with the optical insulating coating covers at most 50% of the clear glass to promote the adhesion of the optical insulating coating with the lower interlayer.

[0141] The 100 luminous glazing can have a plurality of extraction zones, including 6, of a given geometry (rectangular, square, round, etc.). Alternatively to the diffusing layer 6 (enamel, ink, screen printed or inkjet printed etc) it can be a film, local, placed or glued locally on the third face F3.

[0142] Alternatively, the light source 4 or 4' can be one or more primary sources (diodes etc.) coupled directly to a guide, along coupling slice, for example optical fiber extractor with light output area.

[0143] You can choose diodes emitting white or colored light for ambient lighting, reading...

[0144] We can plan several series of 4 or 4' diodes (one edge, two edges, three edges, all around the periphery) controlled independently and even of different colors.

[0145] Light sources 4 and 4' can be controlled independently.

[0146] Figure 1b schematically illustrates the injection of light into the upper redirecting element 8. The light rays emitted from the sources of the first set of diodes 4 reach the upper redirecting element 8 (the inclined faces of the reflecting prisms) which reflect and redirect the rays into the carrier film 5' via the front face.

[0147] Figure 1c schematically illustrates the injection of light into the lower redirecting element 8' and the propagation of light. The light rays emitted from the sources of the second set of diodes 4' reach the lower redirecting element 8', which reflects the rays into the glass 2. The rays then propagate by total internal reflection in the glass 2 and / or in the lower interlayer 32.

[0148] Figure 2 represents a schematic cross-sectional view, i.e. transverse to the long sides (along AA) of Figure 2a, of a laminated glass element 200 of a road vehicle according to the invention, in particular a roof of a road vehicle such as an automobile, and in an embodiment variant of Figure 1. Figure 2' represents a schematic longitudinal cross-sectional view, i.e. parallel to the long sides (along BB) of Figure 2a.This glazing 200 differs from the first glazing 100 in that: only the upper redirecting elements 8 extend along the two opposite longitudinal edges (the two long sides) of the glazing; the lower redirecting elements 8' extend only along the two opposite front and rear lateral edges of the glazing (the two short sides), the lower redirecting elements 8' remaining entirely, for example, opposite the rear face Fb of the coated substrate or preferably at the periphery less than 4mm or 1mm from the edges of the coated substrate; thus a single series of diodes is coupled to the right of each of the upper 8 and lower 8' directing elements on each edge of the glazing.

[0149] Figure 3 shows a schematic cross-sectional (transverse to the long sides) and exploded view of an illuminable laminated glass 300 for a road vehicle according to the invention in a third embodiment. Figure 3' shows a schematic longitudinal cross-sectional (parallel to the long sides) view of the illuminable laminated glass 300. This glass 300 differs from the first glass 100 in that: only the upper redirecting elements 8 extend along the two opposite longitudinal edges (the two long sides) of the glass; the lower redirecting elements 8' extend only along the two opposing lateral edges front and rear of the glazing (the two short sides); thus a single series of diodes 4, 4' is coupled to the right of each of the respective upper directing elements 8 and lower 8' on each edge of the glazing; the upper redirecting elements 8 on each side are laminated in the upper interlayer 31 which comprises two sheets upper 31-1 and lower 31-2; the upper sheet 31-1 is for example a clear or tinted PVB; The lower sheet 31-2 is always clear, for example a clear PVB; the upper sheets 31-1 and lower 31-2 have a thickness for example of 0.38 mm; the upper redirecting elements 8 which have the same position as in figure 1 (partially covering the coated substrate while protruding from the edge of the coated substrate) have their prisms oriented towards face F3;the lower redirecting elements 8' are not opposite the coated substrate, they are offset by being immediately at the edge of the coated substrate and are in adhesive contact with the upper intercalated layer 31, with their prisms also oriented towards the face F3.;

[0150] Figure 3a shows a detailed view and a variant positioning, relative to Figure 3', of the lower redirecting element 8', then used to redirect the light. The lower redirecting element 8' is opposite the coated substrate and directly against the rear face 52 and on the optical insulating coating 5 of the inverted coated substrate, the reflecting prisms (the reflective coating) being, however, also oriented towards face F3.

[0151] Figure 4 shows a schematic cross-sectional view of a laminated glass element 400 of a road vehicle according to the invention, in particular a road vehicle roof such as an automobile, and in an embodiment of Figure 1. This glazing 400 differs from the first glazing 100 in that the lower redirecting elements 8' are reversed, with the reflective prisms (the reflective coating) oriented towards face F3. The lower redirecting elements 8' are bonded to face F3 of the second glass sheet 2 using transparent adhesive 60'.

[0152] Figure 5 shows a schematic cross-sectional view of a laminated glass element 500 of a road vehicle according to the invention in a fifth embodiment. This glazing 500 differs from the first glazing 100 in that: the upper interlayer 31 is tinted, for example a tinted PVB; the lower redirecting element 8' is reversed, the reflecting prisms (the reflective coating) being oriented towards the face F3 and bonded to the second glass sheet 2 via transparent adhesive 60'; the extraction means 6 are on the rear face Fb of the coated substrate, in contact with the optical insulating coating 5.

[0153] Figure 6 shows a schematic cross-sectional view of a laminated glass element 600 of a road vehicle according to the invention in a sixth embodiment. This glazing 600 differs from the first glazing 100 in that: the upper interlayer 31 is tinted, for example a tinted PVB; the upper redirecting elements 8 are linked to the carrier film 5' via their entire surface (without protruding), they are in particular fixed there by glue; the optical insulating coating 5 does not cover the entire carrier film 5', the coated substrate thus presenting at each free end of the carrier film from the inner edge a free area 5” not covered by the optical insulating coating, this free area remaining limited in surface area because the lower redirecting elements 8' must be opposite the optical insulating coating 5; the extraction means 6 are on the rear face Fb of the coated substrate, in contact with the optical insulating coating 5; the glazed element has on face F2 a solar control coating 15 covering the surface S (clear view), like a silver stack;the glazed element has on face 14 F4 a coating reflecting infrared 16, forming a low emissivity layer, such as a transparent conductive oxide layer stack (TCO in English, in particular based on indium tin oxide (ITO)).;

[0154] Figure 6' represents a schematic cross-sectional view of a 600' laminated glass element of a road vehicle according to an alternative embodiment of Figure 6: the upper interlayer 31 is possibly a clear PVB as for Figure 1; the upper redirecting elements 8 have their prisms oriented towards the face F3; the lower redirecting elements 8' are directly bonded to the optical insulating coating 5 of the coated substrate with the prisms oriented towards the face F3; in yet another alternative, the lower redirecting elements 8' bonded to the optical insulating coating 5 of the coated substrate may have their prisms oriented towards the face F2.

[0155] Figure 7 shows a schematic cross-sectional view of a laminated glass element 700 of a road vehicle according to the invention in a seventh embodiment. This glazing 700 differs from the first glazing 100 in that: the upper redirecting elements 8 are bonded to the carrier film 5' via their entire surface (without protruding), they are in particular fixed there by adhesive; the upper redirecting elements 8 have their prisms oriented towards face F3; the optical insulating coating 5 does not cover the entire carrier film 5', the coated substrate thus presenting at each free end of the carrier film from the inner edge a free area 5” not covered by the optical insulating coating, this free area remaining limited in surface area because the lower redirecting elements 8' must be opposite the optical insulating coating; the lower redirecting elements 8' have their prisms oriented towards face F3.

[0156] Figure 8 shows a schematic cross-sectional view of a laminated glass element 800 of a road vehicle according to the invention in an eighth embodiment. This glass 800 differs from the first glass 100 in that it comprises, between the upper interlayer 31 and the coated substrate, a device 9. An additional interlayer 33 is then integrated into the laminated glass element and placed between the upper interlayer 31 and the carrier film 5' of the coated substrate to laminate the electro-controllable device 9. Since the device is 0.4 mm thick, an interlayer frame 34, 0.38 mm thick, made of clear or tinted PVB, is added. The edges of the electro-controllable device 9, as well as the interlayer frame 34, are under the internal masking layer 7. The upper interlayer 31 is, for example, clear or tinted PVB. The additional interlayer 33 is clear. The coated substrate 5', 5 is then in adhesive contact with the additional interlayer 33 and the lower interlayer 32.

[0157] The electro-controllable device 9 is here a PDLC liquid crystal cell or a DDPDLC cell.

[0158] The light redirection element 8 (in particular the prismatic reflective or transparent film) faces the internal masking layer 7. Preferably, the light redirection element 8 between face F2 and face F3 is offset from the electro-controllable device 9 to avoid overpressure that can degrade the electro-controllable device, especially when the electro-controllable device is a liquid crystal cell. Thus, in particular, the coated substrate is larger than the electro-controllable device 9, with the edge of the electro-controllable device 9 being offset from the edge of the coated substrate, which is closer to the edge of the glazing. The upper redirection element 8 is always on the carrier film 5' and protrudes from the first edge of the film. The upper redirection element 8 is located opposite the interlayer frame layer 34.To avoid an overthickness effect of the upper redirecting element 8, a preferred safety distance between the limit of the electro-controllable device 9 and the upper redirecting element 8 is at least 10mm, 20mm or in particular 30mm.

[0159] In the realization of this figure 8, the lower redirecting elements 8' have their prisms oriented towards the face F3 and are glued to the second sheet of glass 2.

[0160] Figure 9 shows a schematic cross-sectional view of a laminated glass element 900 for a road vehicle according to the invention in a ninth embodiment. This glass 900 differs from the first glass 100 in that it includes an electrically controlled device 9 between the upper interlayer 31 and the coated substrate. The same laminate structure as that of Figure 8 is reproduced, but with a consistently clear upper interlayer 31, for example, a clear PVB. Furthermore, the lower redirecting element 8' is directly bonded to the optical insulating coating 5 of the coated substrate, with the prisms oriented towards face F3.

[0161] The electrically controllable device 9 is different from the PDLC cell in Figure 8 and is, for example, a so-called host-guest liquid crystal cell (GHLC), or a DDPDLC cell, or even a photovoltaic device with one or more solar cells.

[0162] When the electro-controllable device 9 is a guest host cell, the cell is either unique or comprises a set of sub-cells separated by separators forming an interconnected network, preferably polymer-based with a width of at most 100 pm.

[0163] Figure 10 shows a schematic cross-sectional view of a laminated glass element 1000 forming an illuminated opening side window of a road vehicle according to the invention in a tenth embodiment. The lower visibility limit of the glass is schematically drawn with dashed lines. The light sources 4 are located on one side of the glass and in a door. The upper redirecting element 8 and the redirecting element 8' are arranged within the laminated glass element internally to the body. This glass 1000 differs from the first glass 100 in that: it does not have an internal masking layer 7 on one side (the side of the glass that remains internal to the body); an optional peripheral, opaque internal masking layer 7' is added to the fourth face F3, in particular congruent with or narrower than the width of the internal masking layer 7.

[0164] In relation to Figures 10a to 10d, the opening side window has an irregular lower longitudinal edge 10, 20, which is not straight, with a projecting central portion 101, 201, and recessed front and rear portions 102, 202 and 102', 202', which may be concave in shape. The upper longitudinal edge 10', 20' may be straight, horizontal, or irregular. The side edges 10a, 10b may be parallel or not. The opening side window has a mounting area 110. The mounting area 110 may include at least one opening, as schematically shown in Figure 10c, for securing the window to the vehicle body. The fixing zone 110 can alternatively cooperate by pinching with at least one support or glass holder 9' at the lower edge 10, 20, as shown schematically in figure 10d. There can be a single fixing zone 110 which is central or two fixing zones called front and rear (figures 10c and 10d).The glazing has a lower visibility limit of 701 (dotted line).

[0165] Optionally, the opening side glazing, as shown in Figure 10a to Figure 10d, includes an electro-controllable device 9 which is integrated as explained in Figure 9. The electro-controllable device 9 can be an electroactive device of the PDLC or DDPDLC cell type.

[0166] Figure 10b illustrates, at least in the clear view, an electroactive device segmented into several cell regions 9a, 9b, 9c by at least one electrical discontinuity, in particular of submillimeter width, formed in one of the upper or lower electrodes, notably obtained by laser, each cell region having a power supply. The three segmented regions of guest host cells 9a, 9b, and 9c are all connected to a common connector 41a.

[0167] In the ON state of the guest host cell (here clear state of the glazing), and in the OFF state of the light source (when the light source is turned off), the extraction means 6 can be a diffusing coating 6 which can be opaque, white or almost invisible.

[0168] The extraction means 6 form areas of given geometry (rectangular, square, round ...).

[0169] For example, in the raised position of the side glazing, the light extraction means 6 extend to within 5 cm of this median portion, along a substantially horizontal axis (±1°) and the light source (and the prismatic film re- (reflector or transparent) are longitudinal and extend along this axis substantially horizontal (±1°). Preferably, the light source 4 is at least 5 mm from the irregular lower edge 10, 20.

[0170] In particular (Figure 10a), the internal masking element 7 and the internal masking element 7' extend parallel to the sides of the glazing along three longitudinal bands: upper 71, lateral 72, and 73. The three bands—upper 71 and lateral 72 and 73—of the internal masking element 7' are congruent with those of the internal masking element 7 of face F2 (the internal edge of the internal masking element 7' masking from the inside the internal joint of cell 9 and the edge of the carrier film 5). The internal masking element 7' is an enamel in F3 or an ink on the lower interlayer 32 in PVB, or on the upper support of cell 9, or on the additional interlayer 33.

[0171] Figure 11 shows a schematic cross-sectional view of a laminated glass element 1100 forming a fixed side window (e.g., rear window or quarter window) of a road vehicle according to the invention in an eleventh embodiment II. This element is rectangular in shape, for example, and has a straight lower edge. The lower visibility limit of the glass is schematically drawn with horizontal dashed lines.This glazing 1100 differs from the first glazing 100 in that: the light sources 4, 4' are located on only one side of the glazing and in the door; the upper redirecting element 8 and the lower redirecting element 8' are arranged within the laminated glazing element internally to the door; an optional peripheral, opaque, inner masking layer 7' is added to the fourth face F3, which is congruent with or narrower than the width of the inner masking layer 7 (to also ensure that what is necessary is hidden from view from inside the vehicle and to clearly define the visible area). The upper interlayer 31 of this glazing is made of tinted PVB.

[0172] The fixed side glazing of Figure 11b includes an optional, integrated, electrically controllable device 9, as explained in Figure 9. This electrically controllable device 9 can be an electroactive device of the PDLC or DDPDLC cell type, which is segmented into several cell regions 9a, 9b, and 9c by at least one electrical discontinuity, in particular of submillimeter width, formed in one of the upper or lower electrodes, notably by laser, each cell region having its own power supply. The three segmented host-guest cell regions 9a, 9b, and 9c are all connected to a common connector 41a.

[0173] In particular, for this fixed side glazing, the internal masking element 7 and the internal masking element 7' extend parallel to the sides of the glazing along upper longitudinal bands 71, lower longitudinal bands 7T, and lateral bands 72 and 73 (Figure 11a). The three upper bands 71 ​​and lateral bands 72 and 73 of the internal masking element 7' are congruent with those of the internal masking element 7 of face F2 (the inner edge of the masking element 7' masking from the inside the internal joint of the guest host cell and the carrier film 5). The masking element 7' is an enamel in F3 or an ink on the lower interlayer 32 in PVB or on the upper support of the guest host cell or on the additional interlayer 33.

[0174] Figure 12 represents a schematic cross-sectional view of a laminated glass element 1200 of a road vehicle according to the invention in an embodiment of Figure 1. This glazing 1200 differs from the first glazing 100 in that: the second light source 4' is not front-emitting but laterally emitting from an edge of the glazing, in particular the emission is through the longitudinal edge 20 of the second sheet 2; there is no lower redirecting element 8'.

[0175] Figure 13 shows a schematic cross-sectional view of a laminated glass element 1300 of a road vehicle according to the invention in an embodiment of Figure 1. This glazing 1300 differs from the first glazing 100 in that: the second glass sheet 2 is shorter on one side compared to the first glass sheet 1, leaving at the level of the second slice 20' a free space or recess 2” between this second slice of the second glass sheet and the second slice of the rest of the glazing; the second light source 4' is not front-emitting but side-emitting, the emission being through the second longitudinal slice 20' of the second sheet 2 and being arranged from an edge of the glazing in the recess 2”; there is no lower redirecting element 8';the optical insulating coating 5 does not cover the entire carrier film 5', the coated substrate having at a free end of the carrier film from the inner edge a free area 5” not covered by the optical insulating coating, this free area being opposite the upper redirecting element 8; the upper redirecting element 8 is entirely bonded to the carrier film 5' (without protruding from the inner edge of said carrier film) and is glued to the front face Fa 5T of the carrier film 5' of the coated substrate; the prisms of the upper redirecting element 8 are oriented towards the face F3.;

[0176] Figure 14 represents a schematic cross-sectional view of a laminated glass element 1400 of a road vehicle according to the invention in an embodiment of Figure 1. This glazing 1400 differs from the first glazing 100 in that: the second glass sheet 2 is shorter on one side, at the level of the first slice 20 compared to the first glass sheet 1 and the upper interlayer 31 and the lower interlayer 32 are also shorter, being at the level of the second glass sheet 2; the second light source 4' is not front-emitting but lateral-emitting, the emission being through the first longitudinal slice 20 of the second sheet 2 and being arranged at the level of the shorter edge which provides a step in relation to the first glass sheet.The second light source 4' is fixed by gluing to the first sheet of glass 1 with glue 60” according to the thickness of the two interlayer layers; there is no lower redirecting element 8';. the optical insulating coating 5 does not cover the entire carrier film 5', the coated substrate having at a free end of the carrier film from the inner edge a free area 5” not covered by the optical insulating coating, this free area being opposite the upper redirecting element 8; the upper redirecting element 8 is entirely bonded to the carrier film 5' (without protruding from the inner edge of said carrier film) and is glued to the front face Fa 5T of the carrier film 5' of the coated substrate; the prisms of the upper redirecting element 8 are oriented towards the face F3.

Claims

DEMANDS 1. Illuminatable laminated glazing element for vehicles, particularly road vehicles (100 to 1400), comprising a laminated glazing, preferably curved, transparent, having: a first sheet (1), transparent, of mineral glass, with a first principal face F1 (11), a second principal face F2 opposite (12) and a first slice (10), intended to form the outer glass, - a polymer laminate interlayer (3, 31, 32, 33, 34) having a top interlayer (31), in particular with a refractive index n3a in the visible, in adhesive contact with the second face F2 or with a functional transparent coating on the face F2, a second sheet (2), transparent, of mineral glass or polymer, with a third principal face F3 (13), a fourth principal face F4 opposite (14) and a second slice (20), with a refractive index n1 in the visible of at least 1.5, and the glazing element having an optical insulating layer (5), transparent,with a visible refractive index n2, an optical insulating layer of submillimeter thickness Ei and at least 400 nm, characterized in that it comprises a coated substrate which includes: a transparent film (5'), called the carrier film, made of a polymer distinct from a fluoropolymer, with a leading principal face Fa (5T) oriented towards the F2 face and an opposing trailing principal face Fb (52'), of submillimeter thickness Ef, at least 50 pm, the carrier film having a blur value H1 which is in the range of 0.5% to 2%, and preferably the carrier film having a refractive index n0 greater than n3a, in particular n0-n3a of at least 0.1, the optical insulating layer which is an optical insulating coating (5) on the trailing face Fb, and a slice (50), n2 is less than n1, the difference in refractive indices n1-n2 being at least 0.06 in the visible spectrum, the coated substrate being laminated between the second and third faces F2 and F3,and is between the upper interlayer (31) and a lower interlayer (32), in adhesive contact with the third face F3 or with a functional transparent coating on the face F3, and comprising: a light redirection element (8), called the upper redirection element, capable of redirecting light, preferably emitted from the side of the face F4, into the carrier film via the front face Fa, the upper redirection element being a prismatic reflecting element having reflecting prisms oriented towards the third face F3 or towards the second face F2, light extraction means (6), between the optical insulating coating (5) and the face F4, capable of extracting guided light.

2. Illuminatable laminated glass element of vehicle (100 to 1900) according to claim 1 characterized in that the difference of refractive indices n1- n2 is at least 0.08 in the visible and in that the thickness Ei is at least 500nm, and even at least 800nm.

3. Illuminatable laminated glass element according to claim 1 or 2, characterized in that the blur H1 of the carrier film is at most 1% 4. Illuminatable laminated glass element according to any one of claims 1 to 3 characterized in that the coated substrate completely occupies a view opening of the glass element, and preferably the coated substrate (5, 5') extending beyond the view opening under a peripheral masking layer (7) delimiting the view opening, forming a peripheral frame in particular for fixed glazing or at least three peripheral bands in particular for side opening glazing.

5. Illuminatable laminated glass element according to one of the preceding claims, characterized in that the upper redirecting element is at least partially on the front face Fa.

6. Illuminatable laminated glass element according to any one of claims 1 to 5, characterized in that the glass element comprises a light redirection element (8') called lower redirection element, capable of redirecting into the second sheet (2) light coming from the side of face F4, the lower redirection element being reflective and on the side of face F3, in particular the lower redirection element is a prismatic reflective element comprising reflective prisms oriented towards the third face F3 or towards the second face F2 or the lower redirection element being transparent and on the side of face F4, in particular prismatic.

7. Illuminatable laminated glass element according to the preceding claim, characterized in that the upper redirecting element is near a first edge of the coated substrate, preferably at least partially on the front face Fa, the lower redirecting element (8') is at the periphery of a so-called reference edge which is - the first edge, the lower redirecting element being opposite the rear face Fb, preferably offset towards the center relative to the upper redirecting element - or an edge adjacent or opposite to the first edge, and in that the lower redirecting element is preferably: - at least partially opposite the optical insulating coating, - or at most 4mm, preferably at most 1mm, from the optical insulating coating.

8. Illuminatable laminated glass element according to any one of claims 6 or 7, characterized in that the upper redirecting element is near a first edge of the coated substrate and the glass element comprises another upper redirecting element (8) at the periphery of an edge opposite to the first edge, capable of redirecting light, preferably emitted from the side of face F4, into the carrier film via the front face Fa, and even in that it comprises another lower redirecting element (8') at the periphery of an edge opposite to the reference edge, capable of redirecting into the second sheet (2) light from the side of face F4, the other lower redirecting element being transparent on face F4 or reflective on face F3.

9. Illuminatable laminated glass element according to any one of the preceding claims, characterized in that in configuration a), the reflecting prisms of the upper redirecting element are wholly or partly offset from a first edge of the coated substrate, or in configuration b), the reflecting prisms of the element upper redirectors are wholly or partly in a marginal area of ​​the coated substrate on the front face Fa, in particular along a longitudinal or lateral edge of the coated substrate, the optical insulating coating being absent from said marginal area.

10. Illuminatable laminated vehicle glass element according to any one of the preceding claims, characterized in that the light extraction means (6) comprise a diffusing coating, preferably transparent, with a binder and diffusing particles, in particular on the lower interlayer layer (32) or on the second sheet (2) or on the optical insulating coating.

11. Illuminatable laminated vehicle glass element according to any one of the preceding claims, characterized in that it comprises between the upper interlayer (31) and the lower interlayer (32), above said optical insulating coating, an electro-controllable device (9), in particular with variable diffusion and / or tint, comprising an electroactive layer between a front electroconductive support on the second face F2 and a rear electroconductive support on the third face F3, or a photovoltaic device and preferably in that the lamination interlayer comprises an additional interlayer (33), the coated substrate (5', 5) being sandwiched between the additional interlayer (33) and the lower interlayer (32).

12. Illuminatable laminated glass element according to any one of the preceding claims, characterized in that it comprises: - a first light source (4) on the F4 face side, in particular a first set of light-emitting diodes, optically coupled to said upper redirecting element (8), - a second light source (4'), in particular a second set of light-emitting diodes optically coupled to the second sheet of glass (2).

13. Illuminatable laminated glass element according to the preceding claim, characterized in that at least the first sheet has a first irregular lower longitudinal edge (10, 20), near a first edge of the coated substrate, having at least a first protruding portion called the first overhang, and in that the first light source, the upper redirecting element and the second light source extend below the lower visibility limit of the laminated glass element, at a distance from a fixing zone of the laminated glass element, intended to be coupled to a window lifting system, fixing zone connected to the first overhang.

14. Illuminatable laminated glass element according to claim 13, characterized in that the second sheet (2) is of reduced size, the edge of the second sheet, referred to as the second edge, is straight, in particular horizontal, and below the lower visibility limit of the glazing, the second light source is under face F2 along the second edge for optical coupling by the second edge, or the second sheet has a second irregular lower longitudinal edge having at least one protruding portion, referred to as second overhang opposite said first overhang, the first light source or even the second light source are on the F4 face side.

15. Illuminatable laminated glass element of a vehicle according to any one of the preceding claims, characterized in that it comprises at least one of the following functional elements: - an internal, peripheral, opaque masking layer (7) between the second face F2 and the third face F3, and even covering the perimeter of the optical insulating coating and even of the coated substrate, particularly in contact with the second face F2, in particular defining a clear view, - an inner, peripheral, opaque masking layer on the fourth face F3, in particular congruent with or narrower than the width of the inner masking layer, - an internal opaque peripheral masking element, positioned at the level of the upper redirecting element and / or a lower redirecting element, - an internal coating, reflecting infrared radiation such as a stack of silver layer(s), on the second face F2 on the first sheet or on an additional film, particularly a polymer, - an external coating (16), reflecting infrared, such as a transparent conductive oxide layer stack, on the fourth face F4 of the second mineral glass sheet.

16. Vehicle in particular road vehicle incorporating an illuminable laminated glazed element according to one of the preceding claims, in particular roof or side glazing opening or fixed.

Images