Illuminatable glazing for a vehicle, illuminated glazing assembly and associated vehicle

Abstract

Illuminatable glazing for a vehicle, illuminated glazing assembly and associated vehicle The invention relates to an illuminateable glazing (12) for a vehicle comprising: - an outer glass sheet (20), - a light guide (24) delimited by a main outer surface (24A) and a main inner surface (24B), - an optical insulation contact layer (30) having an inner surface (30B) extending in contact with a first part of the main outer surface of the light guide, and having a refractive index strictly lower than a minimum refractive index of the light guide, - at least one absorbing layer (32).At least one absorbing layer extends into contact with a second part of the main external surface of the light guide or into contact with a part of the main internal surface of the light guide, and the refractive index of the absorbing layer is substantially equal to the refractive index of the optical isolation contact layer. Figure for the abstract: 2.

Description

Title of the invention: Illuminatable glazing for a vehicle, illuminated glazing assembly and associated vehicle

[0001] The present invention relates to an illuminable glazing for a vehicle, in particular a motor vehicle, intended to be illuminated by at least one lighting device comprising at least one light source, the glazing extending along a principal direction of extension, the glazing having an outer face, an inner face and an edge connecting the outer and inner faces, the glazing comprising: - an external sheet of glass, organic or mineral, having an external surface and an opposing internal surface, the external surface of the external sheet of glass delimiting at least in part the external face of the glazing, - a light guide adhesively bonded to the outer glass sheet, the light guide being delimited by a principal outer surface extending at least partially opposite the inner surface of the outer glass sheet and an opposing principal inner surface, the light guide being configured to guide at least a portion of the light rays generated by the light source along a principal direction of propagation by total internal reflection at least between said principal outer and inner surfaces of the light guide, a minimum refractive index being defined for the light guide, a limiting angle of total internal reflection being predefined for the light guide,said predefined limiting angle of total internal reflection being such that the refracted ray of a light ray propagating in the light guide striking the main external surface of the light guide with the predefined limiting angle of total internal reflection forms an angle of 90° with the normal to the main external surface of the light guide, , - an optical isolation contact layer having an external surface and an opposing internal surface, the internal surface of the optical isolation contact layer extending into contact with a first part of the main external surface of the light guide, said optical isolation layer having a refractive index strictly lower than the minimum refractive index of the light guide, - at least one layer of an optically absorbing material, called the "absorbing layer", extending into a peripheral area of ​​the glazing.

[0002] The invention also relates to an illuminable glazed assembly comprising the illuminable glazing.

[0003] The invention also relates to a vehicle, in particular a motor vehicle, comprising said illuminable glazing or said illuminable glazed assembly.

[0004] The illuminable glazing according to the invention is intended to be illuminated by a light source. Such illuminable glazing, when illuminated, essentially has a function of illuminating an area to be lit, and in particular a function of ambient lighting, signaling, reading, etc., of the area to be lit. Typically, the light source used to implement such a lighting or signaling function comprises one or more illuminating modules, each comprising one or more light-emitting diodes (LEDs).

[0005] In conventional devices, it has been observed that when the glazing is illuminated, a halo can appear in and around the area of ​​the glazing where the light is injected. This halo arises from the scattering of light rays that are not guided by the light guide when they reach the optical insulation contact layer and possibly other layers of the glazing that can be illuminated. This halo then diminishes as the distance from the injection point of the light rays in the light guide increases because, after several reflections in the light guide, the light rays are absorbed by the optical insulation contact layer or other layers of the glazing.

[0006] Such a halo can take various forms, such as concentric circles or a repetition of lines.

[0007] Such a halo is undesirable because it can detract from the aesthetics of the illuminable glazing when it is illuminated.

[0008] To overcome this halo phenomenon, it is known to position an opaque layer absorbing light rays at the point of a light injection zone of the light guide between the outer glass sheet and the light guide so as to absorb the light rays that could be the cause of this halo effect.

[0009] However, it has been observed that this absorbing layer absorbs light rays, called "useful light rays", which otherwise could have been guided in the light guide and thus extracted from the light guide to an area to be illuminated by the light extraction means.

[0010] One of the aims of the present invention is to overcome the above disadvantages by providing an illuminable glazing for a vehicle, in particular a motor vehicle, intended to be illuminated by a light injection means comprising at least one light source enabling the maximization of the quantity of useful light rays that can be guided and then extracted from the light guide to an area to be illuminated when said device is illuminated while minimizing the presence of halo when the illuminable glazing is viewed with the naked eye from the outside when it is illuminated.

[0011] To this end, according to the invention, at least one absorbing layer extends into contact with a second part of the main external surface of the light guide or into contact with a part of the main internal surface of the light guide, and the index The refractive index of the absorbing layer is approximately equal to the refractive index of the optical insulation contact layer.

[0012] Because the refractive index of the absorbing layer is substantially equal to the refractive index of the optical insulation contact layer, and because at least one absorbing layer extends into contact with a second part of the main external surface of the light guide or with the main internal surface of the light guide, the quantity of useful light rays that can be guided and then extracted from the light guide to an area to be illuminated when the device is illuminated is maximized. Indeed, when the device is illuminated, the useful light rays are reflected by the absorbing layer and thus guided into the light guide before being extracted from the light guide to an area to be illuminated. This maximizes the quantity of useful light rays that can be guided and then extracted for illuminating an area to be illuminated while limiting the occurrence of the halo effect.

[0013] In particular, in the present description, "a refractive index of the absorbing layer is substantially equal to a refractive index of the contact layer" means that the refractive index of the absorbing layer is equal to the refractive index of the contact layer ± 0.02.

[0014] According to other advantageous aspects of the invention, the glazing according to the invention comprises one or more of the following features, taken individually or in all technically possible combinations#: - the light guide includes at least one sheet of glass forming an internal sheet of glass of the glazing, the glazing including a lamination interlayer bonding adhesively together the external sheet of glass and the internal sheet of glass, the lamination interlayer extending between the external sheet of glass and the internal sheet of glass. - the lamination interlayer includes the optical insulation contact layer. - the light guide includes at least one other layer comprising at least one polymer, said other layer extending at least between the inner glass sheet and the optical isolation contact layer, said other layer of the light guide forming at least in part the lamination interlayer. - The predefined limiting angle of total internal reflection depends on the refractive index of the optical insulation contact layer. - In at least one transverse plane substantially perpendicular to the principal direction of extension, the at least one absorbing layer has a predetermined length depending on the predefined limiting angle of total internal reflection. - In at least one transverse plane substantially perpendicular to the principal direction of extension, the glazing has a predetermined injection point for light rays in said light guide, said predetermined injection point being a point located on a portion of a slice of the light guide when said slice forms an entry face for the light rays or on an edge of a face of a light redirection element opposite to a light redirection face of said element, said edge being the edge closest to a central area of ​​the glazing, at least one absorbing layer having, in said transverse plane, at least a part extending at the right of the predefined injection point towards a central area of ​​the glazing. - in said transverse plane, at least one absorbing layer extends in contact with said second part of the main external surface of the light guide at least between a starting point corresponding to the projection of the predefined injection point onto the main external surface of the light guide and an ending point on the main external surface of the light guide, a reference light ray being defined for the light guide as a theoretical light ray emitted from the predefined injection point in the direction of the main internal surface of the light guide,the reference light ray having an incident component originating from the predefined injection point and striking the main internal surface of the light guide at a first point on the main internal surface of the light guide, and a component reflected on the main internal surface of the light guide originating from said first point and intersecting the main external surface of the light guide at a second point, forming the predefined limiting angle of total internal reflection with a normal to the main external surface of the light guide, said arrival point corresponding to said second point. - the incident component starts from the predefined injection point and strikes the main internal surface of the light guide at a first point on the main internal surface of the light guide, after possible refraction, and the component reflected on the main internal surface of the light guide starts from said first point and intersects the main external surface of the light guide at a second point forming the predefined limiting angle of total internal reflection with a normal to the main external surface of the light guide, after possible refraction. - the light guide comprises a single sheet of glass forming an internal glass sheet of the glazing. - in said transverse plane, at least one absorbing layer extends in contact with the main internal surface of the light guide at least between a starting point corresponding to the projection of the predefined injection point onto the main internal surface of the light guide and an ending point on the main internal surface of the light guide, a reference light ray being defined for the light guide as a theoretical light ray emitted from the predefined injection point in the direction of the main internal surface of the light guide, the light ray of reference presenting an incident component starting from the predefined injection point and striking the main internal surface of the light guide at a point called the "impact point" by forming the predefined limiting angle of total internal reflection with a normal to the main external surface of the light guide, said arrival point corresponding to said impact point on the main internal surface of the light guide. - the incident component starts from the predefined injection point and strikes the main internal surface of the light guide at a point called the "impact point" by forming the predefined limiting angle of total internal reflection with a normal to the main external surface of the light guide, after possible refraction. - the glass sheet forming the inner glass sheet of the glazing includes an external surface oriented towards the outer glass sheet, the glazing including a light redirection element connected to the outer surface of the glass sheet forming the inner glass sheet. - in said transverse plane, the absorbing layer extends in contact with said second part of the main external surface of the light guide between a starting point corresponding to the projection of the predefined injection point onto the main external surface of the light guide and an arrival point on the main external surface of the light guide, a reference light ray being defined for the light guide as a theoretical light ray emitted from the predefined injection point in the direction of the main external surface of the light guide, the reference light ray having an incident component starting from the predefined injection point and striking the main external surface of the light guide at a point, called the "impact point", forming the predefined limiting angle of total internal reflection with a normal to the main external surface of the light guide,The arrival point corresponds to the point of impact on the main external surface of the light guide. - the incident component starts from the predefined injection point and strikes the main external surface of the light guide at a point, called the "impact point", forming the predefined limiting angle of total internal reflection with a normal to the main external surface of the light guide, after possible refraction. - the illuminable glazing comprising a light redirection element, the light redirection element being connected to the inner face of the glazing. - at least part of the main internal surface of the light guide is bare and intended to be in contact with a layer of air, in particular the air contained inside the vehicle. - the illuminable glazing includes a light redirection element. - the absorbing layer also extends to the right of the entire light redirection element. - the illuminable glazing includes a peripheral masking layer of a mineral material forming, for example, a frame, the absorbing layer having, for example, at least one overlapping portion extending to the masking layer. - the refractive index of the optical insulation contact layer is between 1.2 and 1.51, preferably between 1.3 and 1.5, advantageously between 1.37 and 1.49 and for example between 1.37 and 1.42. - the light guide has a minimum refractive index, the minimum refractive index of the light guide being strictly greater than the refractive index of the contact layer. - the glazing includes light extraction means configured to extract and diffuse at least a portion of the light rays propagating by reflection in the light guide.

[0015] The invention also relates to an illuminable glazed assembly comprising an illuminable glazing as defined above and further comprising at least one illumination device comprising at least one light source intended to illuminate the illuminable glazing.

[0016] The invention also relates to a vehicle, in particular a motor vehicle, comprising the illuminable glazing as described above or the glazed assembly as described above.

[0017] The features and advantages of the invention will become apparent from the following description, given by way of non-limiting example, and made with reference to the accompanying drawings, in which: - [Fig. 1], [Fig. 1] is a schematic front view representation of an illuminable glazed assembly according to a first embodiment of the invention, - [Fig.2], [Fig.2] is a schematic cross-sectional representation of the illuminable glazed assembly of [Fig.1] along axis II-II, - [Fig.3], [Fig.3] is a schematic cross-sectional representation of an illuminable glazed assembly according to a second embodiment of the invention, - [Fig. 4] is a schematic cross-sectional representation of an illuminable glazed assembly according to a third embodiment of the invention; - [Fig. 5] is a schematic cross-sectional representation of an illuminable glazed assembly according to a fourth embodiment of the invention; - [Fig. 6] is a schematic cross-sectional representation of an illuminable glazed assembly according to a fifth embodiment of the invention; and - [Fig.7], [Fig.7] is a schematic cross-sectional representation of an illuminable glazed assembly according to a variant of the assembly in [Fig.6].

[0018] With reference to Figures 1 and 2, an illuminable glazed assembly 10 according to a first embodiment of the invention is described. The illuminable glazed assembly 10 is, for example, an illuminable glazed assembly 10 for a vehicle, such as a motor vehicle.

[0019] In the following description, the terms "internal" or "interior" and "external" or "exterior" are relative terms. The terms "internal" or "interior" refer to what is facing inward from the illuminable glazed assembly 10, that is, facing inward from the interior of a vehicle passenger compartment on which the illuminable glazed assembly 10 is mounted. The terms "exterior" or "exterior" refer to what is facing outward from the illuminable glazed assembly, that is, facing outward from the interior of the vehicle on which the illuminable glazed assembly 10 is mounted.

[0020] In the rest of the description, the expression "a parameter P is between a first value VI and a second value V" means that the parameter P is greater than or equal to the first value VI and that the parameter P is less than or equal to the second value V2.

[0021] In the following description, the refractive indices are defined for a reference wavelength value in a range from 500 nanometers (nm) to 600 nm, preferably equal to 550 nm.

[0022] Furthermore, it is understood that the dimensions of the different elements represented in the figures are not to scale.

[0023] The following description relates more specifically to a motor vehicle of the car type, for example an electric and / or autonomous car. The term "electric car" here refers to a car that has at least one electric motor and that, in order to move (i.e., to operate said at least one electric motor), uses only the electrical energy stored in one or more batteries with which it is equipped.

[0024] It is important to note, however, that the present invention is not limited to the case of an electric and / or autonomous car, and may indifferently concern a hybrid car or even a car equipped solely with a combustion engine, the latter being autonomous or not.

[0025] More generally, the fact of considering a motor vehicle of the car type does not constitute a limitation of the invention, the latter remaining applicable to any type of motor vehicle, such as a truck, a bus, etc.

[0026] With reference to Figures 1 and 2, the illuminable glazed assembly 10, hereinafter referred to as "glazed assembly 10", comprises an illuminable glazing 12, hereinafter referred to as "glazing 12 " and an illumination device 14 comprising at least one light source 16 intended to illuminate the glazing 12.

[0027] In the example illustrated in [Fig.1], the glazing 12 is a glass roof of the vehicle.

[0028] Alternatively, the glazing 12 is a side window of the vehicle.

[0029] As can be seen in [Fig. 1], the glazing 12 extends along a principal extension direction identified by an axis E, referred to hereafter as the "principal extension direction E". The principal extension direction E corresponds, for example, to the direction separating the front and rear wheels of the vehicle when the glazing assembly 10 is mounted on the vehicle.

[0030] In addition, a transverse plane substantially perpendicular to the main extension direction E is defined.

[0031] The glazing 12 comprises an outer glass sheet 20, a masking layer 22, a light guide 24, light extraction means 26, for example a light redirection element 28, an optical insulation contact layer 30, a layer of an optically absorbing material 32, referred to as the "absorbent layer 32", and, in this example, at least one interlayer 34, referred to as the "outer interlayer 34", extending between the optical insulation contact layer 30 and the outer glass sheet 20. In addition, a predefined injection point IP of light rays into said light guide 24 is defined for the glazing 12.

[0032] The glazing 12 is curved. Alternatively, the glazing 12 is flat.

[0033] The glazing 12 has an external face 12A, an internal face 12B opposite the face external 12A and a slice 12C connecting the external and internal faces 12A, 12B.

[0034] The direction separating said outer face 12A and said inner face 12B from each other is referred to hereafter as "separation direction".

[0035] At least a portion of the outer face 12A of the glazing 12 is intended to be in contact with an external environment inside the vehicle when the glazing assembly 10 is mounted on the vehicle.

[0036] At least a portion of the inner face 12B of the glazing 12 is intended to delimit, at least partially, the interior of the vehicle when the glazing assembly 10 is mounted on the vehicle. This portion of the inner face 12B of the glazing 12 is intended to be in contact with the interior of the vehicle when the glazing assembly 10 is mounted on the vehicle.

[0037] As can be seen in [Fig.1], the slice 12C of the glazing 12 comprises two portions of longitudinal slice 12CL, extending mainly along the main extension direction E of the glazing 12 and two portions of transverse slice 12Ct extending substantially along a direction perpendicular to the main extension direction E.

[0038] The longitudinal slices 12CL have, for example, a greater length than the length of the transverse slices 12CT.

[0039] In the example illustrated in [Fig.2], the predefined injection point IP is arranged on an edge of the light redirection element 28.

[0040] In the particular example illustrated in [Fig.2], the predefined injection point IP is, in addition, arranged on the main external surface of the light guide 24.

[0041] The external glass sheet 20 has an external surface 20A and an internal surface 20B.

[0042] The external surface 20A of the external glass sheet 20 delimits the external face 12A of the glazing 12.

[0043] The internal surface 20B of the external glass sheet 20 is adhesively bonded to the external interlayer layer 34.

[0044] The internal surface 20B of the external glass sheet 20 is, in this example, in contact with the masking layer 22.

[0045] The outer glass sheet 20 is transparent.

[0046] For example, the outer glass sheet 20 is made of mineral glass.

[0047] By way of example, the outer glass sheet 20 is made of soda-lime glass (also called soda-lime silico-glass), quartz glass, borosilicate glass or aluminosilicate glass.

[0048] Alternatively, the outer glass sheet 20 is made of organic glass. For example, in this case, the outer glass sheet 20 is made from rigid and transparent plastics, for example polycarbonate, polyethylene terephthalate (PET) or polymethyl methacrylate.

[0049] For example, the outer glass sheet 20 is colorless.

[0050] For example, for an external transparent glass sheet 20 and colorless Planilux® glass marketed by the Applicant.

[0051] Alternatively, the outer glass sheet 20 is tinted.

[0052] For example, Venus® glass, TSA3+ or TSA4+, also marketed by the Applicant, will be advantageously used for an external transparent and tinted glass sheet 20.

[0053] The outer glass sheet 20 typically has a thickness between 1.4 millimeters (mm) and 2.2 mm, and preferably between 1.6 mm and 2.1 mm.

[0054] The outer glass sheet 20 has, for example, a refractive index between 1.51 and 1.54.

[0055] The masking layer 22 has an external surface 22A and an internal surface 22B.

[0056] In the present example, as can be seen in [Fig. 1], the masking layer 22 has the shape of a peripheral frame. The internal limit of the masking layer 22, with respect to the slice 12C of the glazing 12, is represented by dashed lines in [Fig. 1].

[0057] In the present example, the masking layer 22 extends between a portion of the outer glass sheet 20 and a portion of the outer interlayer layer 34.

[0058] The masking layer 22 is in contact with a portion of the internal surface 20B of the external glass sheet 20.

[0059] The masking layer 22 is an opaque layer.

[0060] The masking layer 22 extends alongside the redirection element 28 of the light according to the direction of separation.

[0061] The masking layer 22 makes it possible to mask at least part of the light source 16.

[0062] The mask layer 22 makes it possible to mask the light redirection element 28 when looking at the glazing 12 through the external face 12A of the glazing 12.

[0063] The masking layer 22 is for example made of a mineral material.

[0064] The masking layer 22 is for example made of an enamel.

[0065] The masking layer 22 is, for example, black in color.

[0066] The light guide 24 is delimited by a main external surface 24A, a The main internal surface 24B is opposite the main external surface 24A, and a slice 24C is also present. The light guide 24 comprises at least one layer. A limiting angle of total internal reflection, denoted 0RT, is predefined for the light guide 24. A minimum refractive index is defined for the light guide 24.

[0067] The light guide 24 is adhesively bonded to the outer glass sheet 20.

[0068] In particular, the light guide 24 is adhesively bonded to the internal surface 20B of the outer glass sheet 20.

[0069] The light guide 24 is in contact with the optical insulation contact layer 30 on the side of its main external surface 24A.

[0070] Thus, a first part of the main external surface 24A of the light guide 24 is in contact with the optical insulation contact layer 30.

[0071] In the present example, a second part of the main external surface 24A of the light guide 24 is in contact with the absorbing layer 32.

[0072] Furthermore, in this example, the main external surface 24A of the light guide 24 is in contact with a face of the light redirecting element 28.

[0073] The main internal surface 24B of the light guide 24 is intended to be in contact with an air blade, i.e. the air contained in the passenger compartment of the vehicle.

[0074] In the example illustrated in [Fig.2], the main internal surface 24B of the light guide 24 forms at least in part the internal face 12B of the glazing 12.

[0075] The edge of the light guide 24 connects the main internal and external surfaces 24A, 24B of the light guide 24.

[0076] Furthermore, with reference to [Fig.2], the main internal surface 24B of the light guide 24 is turned towards the light source 16.

[0077] In the present example illustrated in [Fig.2], the light guide 24 comprises a single layer 38. Alternatively, the light guide 24 comprises several layers.

[0078] The layer 38 of the light guide 24 is delimited by an external surface 38A and an internal surface 38B.

[0079] In the present example, the external surface 38A of the layer 38 of the light guide 24 forms the main external surface 24A of the light guide 24.

[0080] In this particular case, the internal surface 38B of the layer 38 of the light guide 24 forms the internal face 12B of the glazing 12.

[0081] The layer 38 of the light guide 24 is advantageously a glass sheet forming an internal glass sheet of the glazing 12. The layer 38 of the light guide 24 is sometimes referred to hereafter as "internal glass sheet 38".

[0082] Layer 38 of the light guide 24 is transparent.

[0083] For example, the inner glass sheet 38 is made of mineral glass.

[0084] By way of example, the internal glass sheet 38 is made of soda-lime glass, quartz glass, borosilicate glass or aluminosilicate glass.

[0085] Alternatively, layer 38 is made of organic glass. For example, in this case, layer 38 is made from rigid and transparent plastics, for example polycarbonate, polyethylene terephthalate (PET) or polymethyl methacrylate.

[0086] For example, layer 38 of the light guide 24 is colorless.

[0087] Glass will be advantageously used for a transparent and colorless layer 38 Planilux® marketed by the Plaintiff.

[0088] The layer 38 typically has a thickness E38 of between 0.7 mm and 3.2 mm, preferably between 1.2 and 2.1 millimeters (mm).

[0089] The layer 38 of the light guide 24 has, for example, a refractive index n38 between 1.51 and 1.54, for example between 1.51 and 1.52.

[0090] The minimum refractive index of the light guide 24 is defined as corresponding to the minimum of the refractive indices of the layers composing the light guide 24.

[0091] In the example illustrated in [Fig.2], the light guide 24 comprising the single layer 38, the minimum refractive index of the light guide 24 is equal to the refractive index n38 of the single layer 38 composing the light guide 24.

[0092] When alternatively the light guide 24 comprises several layers, The minimum refractive index of the light guide 24 corresponds to the smallest refractive index among the refractive indices of the layers composing the light guide 24.

[0093] The minimum refractive index of the light guide 24 is strictly greater than the refractive index of the optical insulation contact layer 30, denoted "n30".

[0094] The predefined internal total reflection limiting angle 0RT is such that the refracted ray of a light ray propagating in the light guide 24 striking the main external surface 24A of the light guide 24 with the predefined internal total reflection limiting angle 0RT forms an angle of 90° with the normal to the external surface 24A of the light guide 24.

[0095] The limiting angle of total internal reflection 0RT predefined depends on the refractive index n30 of the optical insulation contact layer 30.

[0096] The predefined limiting angle of total internal reflection 0RT depends, moreover, on the refractive index "n24E" of the outermost layer of the light guide 24 in contact with the optical isolation contact layer 30 defining the main external surface 24A of the light guide 24.

[0097] In the example illustrated in [Fig.2], the outermost layer of the light guide 24 corresponds to the single layer 38 of the light guide 24. Thus, the refractive index n24E of the outermost layer of the light guide 24 corresponds to the refractive index n38 of the single layer 38 of the light guide 24.

[0098] Thus, the predefined total internal refraction limiting angle 0RT can be written as follows:

[0099] a _ LJ ^RT— )

[0100] The light guide 24 is configured to guide at least a part of the light rays generated by the light source 16 along a principal propagation direction P by total internal reflection at least between said principal internal and external surfaces 24A, 24B of the light guide 24.

[0101] A first reference light ray RI is defined for the light guide 24 as being a theoretical light ray emitted from the predefined injection point IP in the direction of the main internal surface 24B of the light guide 24.

[0102] The first reference light ray RI is illustrated in [Fig.2].

[0103] The first reference light ray RI includes an incident component CI and a reflective CR component.

[0104] The incident component CI starts from the predefined injection point IP and strikes the main internal surface 24B of the light guide 24 at a first point XI of the main internal surface 24B of the light guide 24.

[0105] The first reference light ray RI is injected into the glazing 12 in a layer called the "injection layer".

[0106] The incident component CI of the first reference light ray RI is generally defined as comprising the portion of the ray injected into the injection layer and the possible portion(s) of the ray refracted, in particular on one or more additional layers of the light guide 24, until reaching the main internal surface 24B of the light guide 24.

[0107] The injection layer is a layer of the light guide 24 or another layer of the glazing 12.

[0108] In the example illustrated in [Fig.2], the injection layer is a layer of the light guide 24.

[0109] In the example of [Fig.2], the injection layer corresponds to the single layer 38 of the light guide 24.

[0110] In the particular example illustrated in [Fig.2], the first reference light ray RI passes through a single layer, namely the injection layer formed by the single layer 38 of the light guide 24.

[0111] Thus, in the example illustrated in [Fig.2], the incident component CI includes the injected ray portion and does not include a refracted ray portion.

[0112] As seen in [Fig.2], the incident component CI of the first reference light ray RI passes through the single layer 38 of the light guide 24 from the predefined injection point IP to the first point XI on the main internal surface 24B of the light guide 24.

[0113] The reflected component CR of the first reference light ray RI corresponds to the component of the first reference light ray RI reflected on the main internal surface 24B of the light guide 24 from said first point XI on the main internal surface 24B of the light guide 24 and intersecting the main external surface 24A of the light guide 24 at a second point X2 forming the predefined total internal refraction limiting angle 0RT with a normal to the main external surface 24A of the light guide 24.

[0114] The reflected component CR of the first reference light ray RI is generally defined as comprising the portion of the light ray reflected on the main internal surface 24B of the light guide 24 and the possible portion(s) of the ray refracted, in particular on one or more additional layers of the light guide 24, until reaching the main external surface 24A of the light guide 24.

[0115] In the example illustrated in [Fig.2], the reflected component CR of the first reference light ray RI passes through the single layer 38 of the light guide 24 from the first point XI to the main external surface 24A of the light guide 24 at point X2.

[0116] Thus, in the specific example illustrated in [Fig.2], the reflected component CR of the first reference light ray RI includes a portion of light ray reflected on the main internal surface 24B of the light guide 24 and does not include a portion of refracted ray.

[0117] As seen in [Fig. 1], the light redirection element 28, referred to as "redirection element 28", has the form of a band extending in the vicinity of a corresponding portion of the glazing 12C along an extension direction.

[0118] The extension direction is substantially parallel to the main extension direction E of the glazing 12.

[0119] For example, as seen in [Fig.2], the redirection element 28 is connected to the external surface 38A of the internal glass sheet 38.

[0120] In the present case, as seen in [Fig.2], the redirection element 28' extends over the main external surface 24A of the light guide 24.

[0121] The light redirection element 28, referred to as "redirection element 28" hereafter, is intended to redirect light emitted by the light source 16 into the light guide 24, in this case into the single layer 38 of the light guide 24.

[0122] In particular, the redirection element 28 is capable of redirecting at least part of the light into the single layer 38 of the light guide 24 at an angle greater than or equal to the predefined internal total reflection angle 0RT.

[0123] In the example illustrated in [Fig.2], the redirection element 28 is a reflecting light redirection element.

[0124] The redirection element 28 has a body, a light redirection face 28A, and an opposite face 28B to the redirection face 28A.

[0125] The body of redirection element 28 is transparent.

[0126] The body has a light transmission of at least 70%, preferably at least 80% and even more preferably at least 90%.

[0127] In the example illustrated in [Fig.2], the redirection face 28A forms an external face of the redirection element 28.

[0128] The redirection face 28A is textured.

[0129] The redirection face 28A is, for example, fully textured. Alternatively, the redirection face 28A is partially textured.

[0130] The redirection face 28A is delimited by prisms.

[0131] The redirection face 28A is a reflective face.

[0132] The prisms are, in this example, reflective prisms.

[0133] According to a particular example, the redirection element 28 comprises a reflective layer, for example metallic (for example by conformal deposition on the prismatic textured surface), defining the redirection face 28A.

[0134] The redirection face 28A of the redirection element 28 is configured to reflect at least part of the light rays emitted by the light source 16.

[0135] The opposite face 28B forms an internal face of the redirection element 28.

[0136] The opposite face 28B is a flat face.

[0137] The opposite face 28B is connected to the external surface 38A of the internal glass sheet 38.

[0138] In this particular case, the opposite face 28B extends over the main external surface 24A of the main external layer 24A of the light guide 24.

[0139] In the present example, the opposite face 28B is in contact with said main external surface 24A of the light guide 24.

[0140] For example, the opposite face 28B is fixed by suction onto the main external surface 24A of the light guide 24.

[0141] Alternatively, the opposite face 28B is not directly in contact with the external surface 38A of the internal glass sheet 38. For example, the redirecting element 28 is glued with a layer of adhesive to the external surface 38A of the external glass sheet 38.

[0142] The opposite face 28B comprises a first edge 28C and a second edge 28D.

[0143] The first edge 28C is the edge furthest from a central area of ​​the glazing 12.

[0144] The term "central glazing area" means a local area of ​​the glazing 12 through which passes a median plane of the glazing 12, said median plane being substantially parallel to the principal extension direction E of the glazing 12.

[0145] The first edge 28C is the edge closest to said corresponding portion of slice 12C of the glazing 12.

[0146] For example, the first edge 28C is at a distance from said corresponding portion of slice 12C of the glazing 12.

[0147] The second edge 28D is the edge closest to the central area of ​​the glazing 12.

[0148] The second edge 28D is the edge furthest from said corresponding portion of section 12C of glazing 12.

[0149] In the transverse plane, the predefined injection point IP corresponds to the edge of the opposite face 28B to the redirection face 28A closest to the central area of ​​the glazing 12, i.e. the second edge 28D in the case at hand.

[0150] It is important to note that in the present case, the redirecting element 28 being in contact with the main external surface 24A of the light guide 24 via the opposite face 28B to the reflective face 28A, it is considered that the predefined injection point Ip is located on the main external surface 24A of the light guide 24.

[0151] For example, the redirection element 28 is a flexible film which has the property of adapting to the curvature of the surface over which it is stretched.

[0152] For example, redirection element 28 is a prismatic film.

[0153] Such a prismatic film is, for example, a polymer prismatic film.

[0154] The light extraction means 26 are configured to extract and diffuse at least a portion of the light rays propagating in the light guide 24.

[0155] More particularly, and as illustrated by [Fig.1] by way of no limitation, said extraction means 26 are, preferably, a diffusing coating, for example, opaque in color white or transparent.

[0156] In the present example, as seen in [Fig.2], the extraction means 26 are arranged on the internal surface 38B of the layer 38 of the light guide 24.

[0157] The diffusing coating comprises, for example, a matrix (organic or mineral) and diffusing particles, for example of metal oxide (TiO2, etc.).

[0158] Such a diffusing coating made of mineral material is, for example, described in document FR3084355 as a transparent enamel. Alternatively, such a diffusing coating made of mineral material is, for example, described in document WO2022023638 as a transparent layer.

[0159] It should be noted that, for the sake of simplicity in the description and the figure, six diffusing coatings are shown here. However, there is no limitation on the number of diffusing coatings that can be used as light extraction means. This lack of limitation also applies to the nature of these diffusing coatings and their respective positions in the light guide 24. Generally, these aspects are well known to those skilled in the art and are therefore not described further here.

[0160] The optical insulation contact layer 30, referred to as "contact layer 30" hereafter, has an external surface 30A and an internal surface 30B.

[0161] The contact layer 30 acts as an optical insulator for the light guide 24.

[0162] Furthermore, in this example, the contact layer 30 forms an internal intercalated layer.

[0163] The contact layer 30 extends between the outer interlayer 34 and the light guide 24.

[0164] The contact layer 30 is in contact with the external intercalated layer 34.

[0165] The external surface 30A of the contact layer 30 is in contact with at least one external interlayer 34.

[0166] The external surface 30A of the contact layer 30 is arranged on the side of the external glass sheet 20.

[0167] The contact layer 30 is in contact with the light guide 24.

[0168] The internal surface 30B of the contact layer 30 is in contact with said first part of the external surface 24A of the light guide 24.

[0169] Furthermore, in the present example, the internal surface 30B of the contact layer 30 is in contact with the textured surface 28A of the redirection element 28 and in contact with an external surface 32A of the absorbing layer 32.

[0170] The refractive index n30 of the contact layer 30 is strictly less than the minimum refractive index defined for the light guide 24.

[0171] The refractive index n30 of the contact layer 30 is advantageously between 1.2 and 1.51, for example between 1.3 and 1.5, for example between 1.37 and 1.49, for example between 1.37 and 1.42.

[0172] For example, the contact layer 30 is made of a polymer, for example selected from poly(vinyl butyral) (PVB), a thermoplastic polyurethane, a thermosetting polyurethane.

[0173] The contact layer 30 is for example made of untinted PVB, such untinted PVB also being commonly known as "clear PVB".

[0174] For example, the refractive index of untinted PVB is between 1.48 and 1.49.

[0175] The absorbing layer 32 has the property of absorbing visible light.

[0176] Preferably, the absorbing layer 32 does not diffuse light or diffuses it very little.

[0177] For example, the absorbing layer 32 has a transmittance of less than 50%, preferably less than 30%, preferably less than 10% for a thickness of 0.38 mm.

[0178] The absorbent layer 32 is an opaque layer, for example tinted.

[0179] For example, the absorbent layer 32 is dyed black.

[0180] The dyed absorbent layer 32 includes, for example, organic dyes.

[0181] Alternatively, the absorbent layer 32 contains pigments.

[0182] The pigments or dyes are black in color.

[0183] For example, the absorbent layer 32 comprises a polymer matrix and pigments or dyes in the polymer matrix.

[0184] The refractive index n32 of the absorbing layer 32 is substantially equal to the refractive index n30 of the contact layer 30. It is understood by "the refractive index of the absorbing layer 32 has a refractive index n32 substantially equal to the refractive index n30 of the contact layer 30" that the refractive index n32 of the absorbing layer 32 is equal to the refractive index n30 of the contact layer 30 plus or minus 0.02 (also noted ± 0.02).

[0185] A person skilled in the art will be able to choose a material for the absorbing layer 32 such that its refractive index n32 is substantially equal to the refractive index n30 of the contact layer 30. The polymer matrix is, for example, a polymer chosen from PVB, ethylene vinyl acetate (EVA) copolymers, thermoplastic polyurethanes or thermoset polyurethanes.

[0186] Alternatively, in addition to the polymer matrix and pigments or dyes, the absorbent layer 32 has pores or comprises particles, in particular porous particles, such as hollow silica nanoparticles.

[0187] In the present embodiment, the absorbent layer 32 comprises a PVB matrix and black pigments.

[0188] The absorbing layer 32 is delimited by an external surface 32A and an internal surface 32B. It further defines a predetermined length L32 for the absorbing layer 32, referred to as the length L32 in the following, and a first minimum length LM32 for the absorbing layer 32.

[0189] As can be seen in [Fig.2], the absorbing layer 32 is in contact with the second part of the main external surface 24A of the light guide 24.

[0190] The second part of the main external surface 24A of the light guide 24 is distinct from the first part of the main external surface 24A of the light guide 24.

[0191] In the example shown in [Fig.2], the absorbing layer 32 extends in a sandwich between the light guide 24 and the contact layer 30.

[0192] In particular, the internal surface 32B of the absorbing layer 32 is in contact with the second part of the main external surface 24A of the light guide 24.

[0193] The external surface 32A of the absorbing layer 32 is in contact with the contact layer 30.

[0194] In particular, as seen in [Fig.2], the absorbing layer 32 has, in said transverse plane, at least one part extending at the right of the predefined injection point IP towards the central area of ​​the glazing 12.

[0195] In the example of [Fig.2], the absorbing layer 32 extends from the predefined injection point IP towards the central area of ​​the glazing 12.

[0196] The absorbing layer 32 is attached to the redirection element 28 on the side of the predefined IP injection point.

[0197] The length L32 of the absorbing layer 32 is defined in the transverse plane.

[0198] The absorbent layer 32 extends over the main external surface 24A of the guide light 24 enters at least between a starting point D corresponding to the projection of the predefined injection point IP onto the main external surface 24A of the light guide 24 and an ending point A on the main external surface 24A of the light guide 24.

[0199] In this particular case, since the predefined injection point IP is on the main external surface 24A of the light guide 24, it is understood that the projection of the point The predefined IP injection point on the main external surface 24A of the light guide 24 is confused with the predefined IP injection point.

[0200] Said arrival point A corresponds to said second point X2 on the main external surface 24A of the light guide 24.

[0201] The distance between the starting point D and the ending point A defines said first minimum length LM32 for the absorbing layer 32.

[0202] In particular, neglecting the curvature of the glazing, X £38

[0203] In other words, LM^ = 2*tan(«FŒn(^)) X £38

[0204] The predetermined length L32, referred to as "length L32" hereafter, of the absorbent layer 32 is greater than or equal to the first minimum length LM32.

[0205] The length L32 of the absorbing layer 32 depends on said predefined internal total reflection angle 0RT.

[0206] The length L32 of the absorbing layer 32 depends on the refractive index n30 of the contact layer 30.

[0207] The absorbent layer 32 has a length L32 greater than or equal to the first minimum length LM32 and less than or equal to 500% of the first minimum length LM32, in particular less than or equal to 400% of the first minimum length LM32, preferably less than or equal to 300% of the first minimum length LM32, more preferably less than or equal to 200% of the first minimum length LM32 and advantageously less than or equal to 150% of the first minimum length LM32.

[0208] The thickness of the absorbing layer 32 is, in the example shown in [Fig.2], less than the thickness of the contact layer 30.

[0209] Advantageously, the thickness of the absorbent layer 32 is greater than or equal to 25 micrometers (pm) and less than or equal to 0.76 mm, for example less than or equal to 0.38 mm.

[0210] For example, as seen in [Fig.1], the absorbing layer 32 has at least one overlapping portion extending over the masking layer 22.

[0211] The outer interlayer 34 forms an outer interlayer of the glazing 12.

[0212] The optical insulation contact layer 30 forming an internal interlayer and the external interlayer 34 together play the role of a lamination interlayer for the glazing 12 and ensure the adhesion of the external glass sheets 20 and internal glass sheets 38 to each other.

[0213] The outer interlayer 34 has an outer surface 34A and an inner surface 34B.

[0214] The outer interlayer 34 extends between the outer glass sheet 20 and the contact layer 30.

[0215] The outer interlayer 34 is adhesively bonded to the outer glass sheet 20 and to the contact layer 30.

[0216] The outer intercalated layer 34 is transparent.

[0217] For example, the outer interlayer 34 is tinted.

[0218] For example, the outer interlayer 34 is tinted grey.

[0219] For example, the transparent, grey-tinted outer interlayer 34 presents a light transmission of 27%.

[0220] The outer interlayer 34 is, for example, made of a polymer, for example selected from PVB, a thermoplastic polyurethane, or a thermosetting polyurethane. In the present example, the outer interlayer 34 is made of PVB, for example, a dyed PVB, in particular gray.

[0221] For example, the outer interlayer 34 in grey-tinted PVB has a refractive index of 1.484.

[0222] The outer interlayer 34 has a thickness greater than or equal to 25 pm and less than or equal to 0.76 mm, preferably between 0.38 mm and 0.76 mm.

[0223] The light source 16 of the illumination device 14 extends substantially longitudinally along the main extension direction E.

[0224] The light source 16 has a main direction of illumination oriented towards the light redirection element 28.

[0225] The light source 16 comprises one or more lighting modules.

[0226] The lighting module(s) comprise one or more light-emitting diodes, also known as LEDs (light-emitting diodes). The LEDs may be front-emitting or side-emitting.

[0227] Such a lighting module comprises, for example, a plurality of LED diodes and includes a support with electroconductive tracks, such as a printed circuit board, for example rectangular support, on which the LED diode is mounted.

[0228] In the embodiment of [Fig.1], the light source 16 is arranged opposite the main internal surface 24B of the light guide 24.

[0229] In particular, the light source 16 is arranged opposite the redirection element 28.

[0230] The main direction of illumination of the light source 16 faces the main internal surface 24B of the light guide 24 and is substantially perpendicular to the main internal surface 24B of the light guide 24.

[0231] In this configuration, at least a portion of the light generated by the light source 16 is incident on said internal principal surface 24B of the light guide 24 so as to pass through layer 38 of the light guide 24 to leave it at the level of its external surface 38A and reach the redirection element 28.

[0232] In operation of the glazed assembly 10, the light emitted by the light source 16 is emitted in a direction perpendicular to the main internal surface 24B of the light guide 24. The light is injected into the layer 38 of the light guide 24 of the glazing 12, enters through the main internal surface 24B of the light guide 24 and exits through the external surface 24A of the light guide 24.

[0233] Then the light enters the redirection element 28 and is reflected by the redirection face 28A. The light redirected by the redirection surface 28A of the redirection element 28 is injected into the light guide 24.

[0234] At least part of the light reflected by the redirecting element 28 is propagated by total internal reflection in the light guide 24 and, more particularly, in this example, on the main internal and external surfaces 24B, 24A of the light guide 24 until reaching the light extraction means 26 to be sent into the interior of the vehicle on which the glazed assembly 10 is mounted.

[0235] Thanks to the absorbing layer 32 according to the invention, at least a portion of the light rays injected into the light guide 24 by the redirecting element 28, having an angle strictly less than the predefined total internal limiting angle of refraction 0RT, are absorbed by the absorbing layer 32. Furthermore, thanks to the fact that the absorbing layer 32 has a refractive index n32 substantially equal to a refractive index n30 of the contact layer 30, the absorption of useful rays is minimized, which makes it possible to maximize the quantity of light rays able to propagate in the light guide 24. Thus, the absorbing layer 32 according to the invention makes it possible to increase the quantity of useful light rays that can be guided in the light guide 24 and then extracted for the illumination of an area to be lit, while limiting the occurrence of the halo phenomenon.

[0236] Alternatively, the glazing 12 further comprises a functional element.

[0237] Advantageously, the functional element is incorporated into the lamination interlayer.

[0238] For example, the functional element extends between the internal intercalated layer formed by the contact layer 30 in the present example and the external intercalated layer 34.

[0239] The functional element may, in particular, be an electrically controllable device, especially one with variable diffusion and / or color. Examples include suspended particle devices (also called SPDs), liquid crystal displays dispersed in a polymer (also called “PDLC” for “Polymer-Dispersed Liquid-Crystal” devices in English) and electrochromic devices.

[0240] In such a case, the lamination interlayer comprises, for example, an additional carrier layer extending between the contact layer 30 forming an internal interlayer and the functional element. The carrier layer is, for example, a tinted or colorless transparent PVB layer.

[0241] A glazed assembly 100 illuminable according to a second embodiment is described with reference to [Fig.3].

[0242] The glazed assembly 100 according to the second embodiment is described solely by difference from the glazed assembly 10 according to the first embodiment described with reference to Figures 1 and 2.

[0243] The glazed assembly 100 differs from the glazed assembly 10 by the glazing 112. The glazing 112 according to the second embodiment differs from the glazing 12 according to the first embodiment in that the light guide 124 comprises several layers, by the optical insulation contact layer 130, referred to as "contact layer 130" and the absorbing layer 132. In addition, the glazing 112 comprises an additional interlayer layer 140 forming an external intermediate interlayer layer.

[0244] It should be noted that in this embodiment, the external glass sheet 120 is of the same nature as the external glass sheet 20 of the first embodiment described with reference to Figures 1 and 2.

[0245] In the example illustrated in [Fig.3], the light guide 124 comprises two layers, an outer layer 142 and an inner layer 138.

[0246] The outer layer 142 and the inner layer 138 are stacked in this order from the outer face 112A of the glazing 112 to the inner face 112B of the glazing 112.

[0247] The outer layer 142 of the light guide 124 extends between the outer intermediate layer 140 and the contact layer 130.

[0248] The outer surface 142A of the outer layer 142 of the light guide 124 delimits the main outer surface 124A of the light guide 124.

[0249] The outer layer 142 of the light guide 124 forms an internal interlayer of the glazing 112. Thus, for example, the outer layer 142 of the light guide 124 is made of polymer.

[0250] The polymer is selected from PVB, EVA, a thermoplastic polyurethane and a thermosetting polyurethane.

[0251] The outer layer 142 of the light guide 124 has a thickness greater than or equal to 25 pm and less than or equal to 0.76 mm, preferably between 0.38 mm and 0.76 mm.

[0252] The refractive index ni42 of the outer layer 142 is strictly less than the refractive index of the inner layer 138.

[0253] The refractive index ni42 of the outer layer 142 is for example between 1.47 and 1.5.

[0254] By way of illustration, the outer layer 142 of the light guide 124 is made of colorless PVB and has a light transmission of 99.9%.

[0255] For example, the refractive index ni42 of the outer layer 142 is strictly less than the refractive index nB8 of the inner layer 138.

[0256] The minimum refractive index of the light guide 124 is, in this example, equal to the refractive index n[42 of the outer layer 142 of the light guide 124.

[0257] The inner layer 138 is of the same nature as the layer 38 of the glazing 12 described with reference to the first embodiment.

[0258] The inner layer 138 forms the inner glass sheet of the glazing 112 and may be referred to hereafter as "inner glass sheet 138".

[0259] The external surface 138A of the internal layer 138 of the light guide 124 is in contact with the internal surface 142B of the external layer 142.

[0260] The main external surface 124A of the light guide 124 is in contact with the contact layer 130.

[0261] In the example illustrated in [Fig.3], the main internal surface 124B of the light guide 124 delimits the internal face 112B of the glazing 112.

[0262] The first reference light ray RI for the light guide 124 differs from the first reference light ray RI of the first embodiment in that its reflected component CR further comprises a refracted ray portion passing through the outer layer 142 of the light guide 124.

[0263] More specifically, as can be seen in [Fig. 3], the incident component CI of the first reference light ray RI passes through the inner layer 138 of the light guide 124 (injection layer) from the predefined injection point IP to the main inner surface 124B of the light guide 124 at point XL

[0264] As seen in [Fig.3], the reflected component CR comprises the portion of the ray reflected on the inner surface 124B of the light guide 124 at point XI which passes through the inner layer 138 of the light guide 124, and a portion of the ray refracted at the interface of the inner layer 138 and the outer layer 142 which passes through the outer layer 142 of the light guide 124.

[0265] Thus, the reflected component CR starts from point XI and intersects the main external surface 124A of the light guide 124 at point X2, forming the predefined internal total refraction limiting angle 0RT with a normal to the main external surface 124A of the light guide 124.

[0266] Redirection element 128 is of the same nature as redirection element 28 described with reference to Figures 1 and 2.

[0267] The redirection element 128 is in contact with the external surface 138A of the internal layer 138 of the light guide 124.

[0268] In particular, the opposite face 128B to the redirection face 128A of the redirection element 128 is in contact with the external surface 138A of the internal layer 138 of the light guide 124.

[0269] In the transverse plane, the predefined injection point IP corresponds to the edge 128D of the redirection element 128 closest to the central area of ​​the glazing 112, i.e. the second edge 128D in the case at hand.

[0270] In the case at hand, the redirection element 128 being in contact with the external surface 138A of the internal layer 138 of the light guide 124 via its face opposite to its redirection face 128A, it is considered that the predefined injection point Ip is located on the external surface 138A of the internal layer 138 of the light guide 124.

[0271] The redirection element 128 is arranged in a sandwich between the two layers 138, 142 of the light guide 124.

[0272] As seen in [Fig.3], in this embodiment, the light extraction means 126 are arranged on the external surface 138A of the internal layer 138 of the light guide 124.

[0273] The contact layer 130 extends between the external intermediate layer 140 and the light guide 124.

[0274] The contact layer 130 is in contact with the external intermediate layer 140 and the light guide 124.

[0275] The contact layer 130 extends into contact with a first part of the main external surface 124A of the light guide 124.

[0276] In particular, the internal surface 130B of the contact layer 130 is in contact with said first part of the external surface 124A of the light guide 124.

[0277] The external surface 130A of the contact layer 130 is arranged on the side of the external glass sheet 20.

[0278] The external surface 130A of the contact layer 130 is in contact with the external intermediate layer 140.

[0279] The contact layer 130 forms an internal intermediate layer of the glazing 112.

[0280] The contact layer 130 has a refractive index nno strictly lower than the minimum refractive index of the light guide 124.

[0281] Advantageously, the contact layer 130 has a refractive index ni30 less than or equal to 1.42, for example between 1.2 and 1.42, preferably between 1.37 and 1.42.

[0282] The refractive index nB2 of the absorbing layer 132 is substantially equal to the refractive index nB0 of the contact layer 130.

[0283] The absorbing layer 132 comprises, for example, a matrix having nanopores or comprising nanoparticles, for example hollow silica nanoparticles.

[0284] The matrix may be organic, in particular crosslinked polymer or thermoplastic, in particular selected from a polymer based on polyacrylate, polyepoxides, polyvinyl acetate, polyester, polyurethane, PVB or the matrix may be mineral in particular silica.

[0285] The refractive index nB2 of the absorbing layer 132 can be adjusted according to the volume of low index or hollow nanopores or nanoparticles.

[0286] For example, the absorbent layer 132 has a transmittance of less than 50%, preferably less than 30%, preferably less than 10% for a thickness of 0.38 mm.

[0287] In the example of [Fig.3], the absorbing layer 132 extends over a second part of the main external surface 124A of the light guide 124.

[0288] As can be seen in [Fig.3], the absorbing layer 132 has, in said transverse plane, at least one part extending at the right of the predefined injection point IP towards a central area of ​​the glazing 112.

[0289] More specifically, the absorbing layer 132 extends from the projection of the predefined injection point IP on said main external surface 124A towards the central area of ​​the glazing 112.

[0290] In particular, the absorbing layer 132 extends over the main external surface 124A of the light guide 124 between a starting point D corresponding to the projection of the predefined injection point IP on the main external surface 124A of the light guide 124 and an ending point A on the main external surface 124A of the light guide 124.

[0291] The projection corresponds to the projection along the separation direction.

[0292] Said arrival point A of the absorbent layer 132 corresponds to said second point X2.

[0293] The distance between the starting point D and the ending point A defines said first minimum length LMB2 for the absorbing layer 132.

[0294] The absorbent layer 132 has a predefined length LB2 greater than or equal to the first minimum length LMB2.

[0295] The length LB2 of the absorbent layer 132 is greater than or equal to the first minimum length LMB2 and less than or equal to 500% of the first minimum length LMB2, in particular less than or equal to 400% of the first length minimum LMB2, preferably less than or equal to 300% of the first minimum length LMi32, more preferably less than or equal to 200% of the first minimum length LMB2 and advantageously less than or equal to 150% of the first minimum length LMB2.

[0296] Thanks to the absorbing layer 132, at least part of the light rays injected into the light guide 124 by the redirecting element 28 having an angle strictly less than the predefined internal total refraction limiting angle 0RT with a normal to the main external surface 124A of the light guide 124 are absorbed by the absorbing layer 132.

[0297] In particular, as can be seen in [Fig.1], the absorbing layer 132 extends, moreover, to the right of the whole of the redirection element 128.

[0298] Thus, the absorbing layer 132 extends, moreover, between point F being the projection of the first edge 128C of the redirecting element 128 and point D.

[0299] In the particular example illustrated in [Fig.3], the absorbing layer 132 is set back from the portion of the edge of the glazing 112 in the vicinity of which it extends.

[0300] For example, the absorbing layer 132 has the same thickness as the assembly formed by the contact layer 130 and the external intermediate layer 140.

[0301] The outer interlayer 134 is of the same nature as the outer interlayer 34 described in the first embodiment.

[0302] The outer interlayer 134 extends between the outer glass sheet 120 and the outer intermediate interlayer.

[0303] The outer interlayer 134 is in contact with the outer glass sheet 120 and in contact with the outer intermediate interlayer 140.

[0304] Furthermore, in this example, the outer intercalated layer 134 is in contact with the absorbent layer 132.

[0305] The external intermediate layer 140 extends between a portion of the external intermediate layer 134 and the contact layer 130.

[0306] The external intermediate layer 140 forms, for example, a support for the contact layer 130.

[0307] The outer intermediate interlayer 140 is transparent.

[0308] For example, the additional intercalated layer 140 is uncoloured.

[0309] The outer intermediate layer 140 has a light transmission greater than or equal to 90%.

[0310] For example, the outer intermediate layer 140 is made of a polymer, thermoplastic or cross-linked polymer, in particular polyester, PET, poly(butylene terephthalate) (PBT), poly(ethylene naphthalate) (PEN) in polyacrylate, polybutylacrylate, polymethacrylate, or in cellulose triacetyl (TAC).

[0311] For example, the transparent and uncoloured outer intermediate layer 140 is a PET sheet.

[0312] The thickness of the external intermediate layer 140 is greater than or equal to 25 micrometers and less than or equal to 200, advantageously greater than or equal to 100 micrometers.

[0313] Thus, in this embodiment, the lamination interlayer of the glazing 112 comprises, from the inside to the outside of the glazing 112, the outer layer 142 of the light guide 124 forming an inner interlayer, the contact layer 130 forming an inner intermediate interlayer, the outer intermediate interlayer 140 and the outer interlayer 134.

[0314] A glazed assembly 200 illuminable according to a third embodiment is described with reference to [Fig.4].

[0315] The glazed assembly 200 according to the third embodiment is described solely by difference from the glazed assembly 10 of the first embodiment described with reference to figures 1 and 2.

[0316] The glazed assembly 200 differs from the glazed assembly 10 of the first embodiment by the glazing 212. The glazing 212 according to the second embodiment differs from the glazing 12 according to the first embodiment by the position of the predefined injection point IP, by the light redirection element 228 and by the absorbing layer 232.

[0317] In [Fig.4], we recognize the outer glass sheet 20, the masking layer 22, the light guide 24 comprising the layer 38, the light extraction means 26, the contact layer 30 whose inner surface 30B extends in contact with a first part of the outer surface 24A of the light guide 24, the outer intercalated layer 34 extending between the contact layer 30 and the outer glass sheet 20.

[0318] The predefined IP injection point is arranged on an edge of the redirection element 228.

[0319] Furthermore, in the present case, the predefined injection point IP is arranged on the internal surface of layer 38 of the light guide 24.

[0320] Thus, in the case at hand, the predefined injection point IP is arranged on the main internal surface 24B of the light guide 24.

[0321] A second reference light ray R2 is defined for the light guide 24, illustrated in [Fig. 4], as a theoretical light ray emitted from the predefined IP injection point towards the main external surface 24A of the light guide 24.

[0322] The second reference light ray R2 has an incident component CI starting from the predefined injection point IP and striking the main external surface 24A of the light guide 24 at a point X3, called the "impact point X3", forming the predefined limiting angle of internal total reflection 0RT with a normal to the main external surface 24A of the light guide 24.

[0323] The second reference light ray R2 is injected into the glazing 12 in a layer called the "injection layer".

[0324] The injection layer is a layer of the light guide 24 or an outer layer of the light guide 24.

[0325] The incident component CI of the second reference light ray R2 is generally defined as comprising the portion of the ray injected into the injection layer and the possible portion(s) of the ray refracted, in particular on one or more additional layers of the light guide 24, until reaching the main external surface 24A of the light guide 24.

[0326] In this example shown in [Fig.4], the second reference light ray R2 is injected into the single layer 38 of the light guide 24 which forms the injection layer.

[0327] The incident component CI of the second reference light ray R2 passes, in this specific example, through the single layer 38 of the light guide 24 from the predefined injection point IP to the main external surface 24A of the light guide 24.

[0328] Thus, the incident component CI of the second reference light ray R2 includes an injected ray portion and does not include a refracted ray portion.

[0329] With reference to [Fig.4], the redirection element 228 extends over the external surface 38A of the internal glass sheet 38.

[0330] In particular, the redirection element 228 is intended to inject light into the single layer 38 of the light guide 24.

[0331] The redirection element 228 has the form of a band extending in the vicinity of a corresponding portion of the edge of the glazing 212 along an extension direction.

[0332] The extension direction is substantially parallel to the main extension direction E of the glazing 212.

[0333] As can be seen in [Fig.4], the redirection element 228 extends in the vicinity of said corresponding portion of the glazing 212.

[0334] The redirection element 228 has a body, a redirection face 228A, an opposite face 228B to the redirection face 228A, a first edge 228C and a second edge 228D.

[0335] The body of redirection element 228 is transparent.

[0336] The body has a light transmission of at least 70%, preferably at least 80% and even more preferably at least 90%.

[0337] In the example illustrated in [Fig.4], the redirection face 228A forms an internal face of the redirection element 228.

[0338] The redirection face 228A is textured.

[0339] The redirection face 228A is, for example, fully textured. Alternatively, The 228A redirection face is partially textured.

[0340] The redirection face 228A is formed by refracting prisms.

[0341] The redirection face 228A of the light redirection element 228 is configured to transmit at least a portion of the light rays emitted by the light source 16 to the main external surface 24A of the light guide 24.

[0342] The opposite face 228B of the redirection element 228 forms an external surface of the redirection element 228.

[0343] The opposite face 228B is a planar face.

[0344] The opposite face 228B extends over the main internal surface 24B of the layer external main 24A of the 24 light guide.

[0345] In the present example, the opposite face 228B is in contact with said main internal surface 24B.

[0346] For example, the opposite face 228B is fixed by suction to the main external surface 24A of the light guide 24.

[0347] Alternatively, the opposite face 228B is not directly in contact with the main external surface 24A of the light guide 24. For example, the redirecting element 228 is glued with a layer of adhesive onto the main external surface 24A of the light guide 24.

[0348] The first edge 228C is the edge furthest from the central area of ​​the glazing 212.

[0349] The first edge 228C is the edge closest to said corresponding portion of 212 glazing section.

[0350] For example, the first edge 228C is at a distance from said corresponding portion of the glazing slice 212.

[0351] The second edge 228D is the edge closest to the central area of ​​the glazing 212.

[0352] The second edge 228D is the edge furthest from said portion of slice corresponding to glazing 212.

[0353] In the transverse plane, the predefined injection point IP is located on the edge of the light redirection element 28 closest to the central area of ​​the glazing 212, i.e. the second edge 228D in the case at hand.

[0354] It is important to note that in the present case, the redirecting element 228 being in contact with the main internal surface 24B of the light guide 24 via its surface opposite to the reflective surface 228A, it is considered that the predefined injection point Ip is located on the main internal surface 24B of the light guide 24.

[0355] The refractive index n232 of the absorbing layer 232 is substantially equal to the refractive index n30 of the contact layer 30.

[0356] For example, the absorbent layer 232 has a transmittance of less than 50%, preferably less than 30%, preferably less than 10% for a thickness of 0.38 mm.

[0357] The absorbing layer 232 is delimited by an external surface 232A and an internal surface 232B. It further defines a second minimum length LM232 for the absorbing layer 232.

[0358] The absorbing layer 232 is in contact with a second part of the main external surface 24A of the light guide 24.

[0359] The external surface 232A of the absorbing layer 232 is in contact with a part of the contact layer 30.

[0360] As can be seen in [Fig.4], the absorbing layer 232 has, in said transverse plane, at least one part extending at the right of the predefined injection point IP towards a central area of ​​the glazing 212.

[0361] More specifically, the absorbing layer 232 extends over the main external surface 24A of the light guide 24 between a starting point D corresponding to the projection of the predefined injection point IP onto the main external surface 24A of the light guide 24 and an ending point A on the main external surface 24A of the light guide 24.

[0362] The starting point D corresponds to point Ip in the example of [Fig.4].

[0363] Said arrival point A corresponds to said impact point X3 on the main surface external main 24A of the 24 light guide.

[0364] The distance between the starting point D and the ending point A defines a second minimum length LM232 for the absorbing layer 232.

[0365] The absorbent layer 232 has a predefined length L232 greater than or equal to the second minimum length LM232.

[0366] The length L232 of the absorbent layer 232 is greater than or equal to the second minimum length LM232 and less than or equal to 500% of the second minimum length LM232, in particular less than or equal to 400% of the second length minimum LM232, preferably less than or equal to 300% of the second minimum length LM232, more preferably less than or equal to 200% of the second minimum length LM232 and advantageously less than or equal to 150% of the second minimum length LM232.

[0367] In the specific example illustrated by [Fig.4], the absorbing layer 232 extends beyond the arrival point A towards the central area of ​​the glazing 212.

[0368] Alternatively, the absorbing layer 232 extends, among other things, between a point corresponding to the projection of the inner edge 228C of the redirecting element 228 onto the main external surface 24A of the light guide 24 and point D.

[0369] A glazed assembly 300 illuminable according to a fourth embodiment is described with reference to [Fig.5].

[0370] The glazed assembly 300 according to the fourth embodiment is described solely by difference from the glazed assembly 10 according to the first embodiment described with reference to Figures 1 and 2.

[0371] The glazed assembly 300 differs from the glazed assembly 10 by the glazing 312. The glazing 312 according to the fourth embodiment differs from the glazing 12 according to the first embodiment only by the absorbing layer 332.

[0372] A third reference light ray R3 for the light guide 24, illustrated in [Fig.5], is defined as a theoretical light ray emitted from the predefined injection point IP in the direction of the main internal surface 24B of the light guide 24.

[0373] The third reference light ray R3 has an incident component CI starting from the predefined injection point IP and striking the main internal surface 24B of the light guide 24 at a point X4 called "impact point X4" forming the predefined internal total reflection limiting angle 0RT with a normal to the main internal surface 24B of the light guide 24.

[0374] The third reference light ray R3 is injected into the glazing 12 in a layer called the "injection layer".

[0375] The injection layer is a layer of the light guide 24 or an outer layer to the light guide.

[0376] The incident component CI of the third reference light ray R3 is generally defined as comprising the portion of the ray injected into the injection layer and the possible portion(s) of the ray refracted, in particular on one or more additional layers of the light guide 24 until reaching the main internal surface 24B of the light guide 24.

[0377] In the example illustrated in [Fig.5], the third reference light ray R3 is injected into the single layer 38 of the light guide 24 which forms the injection layer.

[0378] As can be seen in [Fig.5], the incident component CI of the third reference light ray R3 passes, in this specific example, through the single layer of the light guide 24 from the predefined injection point IP to the main internal surface 24B of the light guide 24.

[0379] Thus, in this specific example, the incident component CI of the third reference light ray R3 includes an injected ray portion and does not include a refracted ray portion.

[0380] The absorbing layer 332 is in contact with a part of the main internal surface 24B of the light guide 24.

[0381] The external surface 332A of the absorbing layer 332 is in contact with the main internal surface 24B of the light guide 24.

[0382] The refractive index n332 of the absorbing layer 332 is substantially equal to the refractive index n30 of the contact layer 30.

[0383] For example, the absorbent layer 332 has a transmittance of less than 50%, preferably less than 30%, preferably less than 10% for a thickness of 0.38 mm.

[0384] The absorbing layer 332 is delimited by an external surface 332A and an opposing internal surface. It further defines a third minimum length LM332 for the absorbing layer 322.

[0385] In particular, as seen in [Fig.5], the absorbing layer 332 has, in said transverse plane, at least one part extending at the right of the predefined injection point IP towards a central area of ​​the glazing 312.

[0386] In the example of [Fig.5], the absorbing layer 332 extends at the predefined injection point IP towards a central area of ​​the glazing 312.

[0387] The absorbing layer 332 extends over the main internal surface 24B of the light guide 24 at least between a starting point D corresponding to the projection of the predefined injection point IP onto the main internal surface 24B of the light guide 24 and an ending point A on the main internal surface 24B of the light guide 24.

[0388] Said arrival point A corresponding to said impact point X4.

[0389] The distance between the starting point D and the ending point A defines a third minimum length LM332 for the absorbing layer 332.

[0390] The absorbent layer 332 has a predefined length L332 greater than or equal to the third minimum length LM332.

[0391] In the example of [Fig.5], the absorbing layer 332 extends beyond the arrival point A towards the central area of ​​the glazing 312.

[0392] The length L332 of the absorbent layer is greater than or equal to the third minimum LM332 and less than or equal to 500% of the third minimum length LM332, in particular less than or equal to 400% of the third minimum length LM332, preferably less than or equal to 300% of the third minimum length LM332, more preferably less than or equal to 200% of the third minimum LM332 and advantageously less than or equal to 150% of the third minimum LM332.

[0393] Alternatively, the absorbing layer 332 extends between a point corresponding to the projection of the inner edge 28C of the redirecting element 228 onto the main inner surface 24B of the light guide 24 and the point D.

[0394] In an alternative (not shown), the glazing 312 according to the fourth embodiment includes an additional absorbent layer.

[0395] The additional absorbing layer corresponds to the absorbing layer 32 of the first embodiment described with reference to [Fig.1] arranged on the main external surface 24A of the light guide 24.

[0396] A glazed assembly 400 illuminable according to a fifth embodiment is described with reference to [Fig.6].

[0397] The glazed assembly 400 according to the fifth embodiment is described solely by difference from the glazed assembly 10 according to the first embodiment.

[0398] The glazed assembly 400 differs from the illuminable glazing assembly 10 of the first embodiment by the glazing 412 and the illumination device 414. The glazing 410 according to the fifth embodiment differs from the glazing 12 according to the first embodiment by the predefined injection point IP, by the fact that the glazing 412 is devoid of a light redirection element and by the absorbing layer 432.

[0399] The predefined injection point IP is arranged on a portion of the slice of the light guide 24.

[0400] The light guide 24 is of the same nature as the light guide 24 of the first embodiment.

[0401] The light source 416 is of the same nature as the light source 16 according to the first embodiment.

[0402] The light source 416 faces the edge of the light guide 24.

[0403] In the transverse plane, the intersection with the illumination axis of the source of light 416 and the slice of the light guide 24 form the predefined IP injection point.

[0404] A fourth reference light ray R4 is defined for the light guide 24, illustrated in [Fig. 6], as a theoretical light ray emitted from the predefined IP injection point towards the main external surface 24A of the light guide 24.

[0405] The fourth reference light ray R4 has an incident component CI starting from the predefined injection point IP and striking the main external surface 24A of the light guide 24 at a point X5, called the "impact point X5", forming the predefined limiting angle of internal total reflection 0RT with a normal to the main external surface 24A of the light guide 24.

[0406] The fourth reference light ray R4 is injected into the glazing 12 in a layer called the "injection layer".

[0407] The injection layer is a layer of the light guide 24 or an outer layer of the light guide 24.

[0408] The incident component CI of the fourth reference light ray R4 is generally defined as comprising the portion of the ray injected into the injection layer and the possible portion(s) of the ray refracted, on one or more additional layers of the light guide 24, until reaching the main external surface 24A of the light guide 24.

[0409] In the specific case illustrated in [Fig.6], the fourth reference ray R4 is injected into the single layer 38 of the light guide 24 which forms the injection layer.

[0410] As seen in [Fig.6], the incident component CI of the fourth reference light ray R4 passes through the single layer of the light guide 24 from the predefined injection point IP to the main external surface 24A of the light guide 24.

[0411] Thus, in this specific example, the incident component CI of the fourth reference light ray R4 includes an injected ray portion and does not include a refracted ray portion.

[0412] The absorbing layer 432 is in contact with a second part of the main external surface 24A of the light guide 24.

[0413] The internal surface 432B of the absorbing layer 432 is in contact with the second part of the main external surface 24A of the light guide 24.

[0414] The refractive index n432 of the absorbing layer 432 is substantially equal to the refractive index n30 of the contact layer 30 in contact with a first part of the main external surface 24A of the light guide 24.

[0415] For example, the absorbent layer 432 has a transmittance of less than 50%, preferably less than 30%, preferably less than 10% for a thickness of 0.38 mm.

[0416] In particular, as seen in [Fig.6], the absorbing layer 432 has, in said transverse plane, at least one part extending at the right of the predefined injection point IP towards the central area of ​​the glazing 412.

[0417] In the example of [Fig.6], the absorbing layer 432 extends from the projection of the predefined injection point IP onto the main external surface 24A of the light guide 24 towards the central area of ​​the glazing 412.

[0418] The absorbing layer 432 extends over the main external surface 24A of the light guide 24 at least from a starting point D corresponding to the projection of the predefined injection point IP onto the main internal surface 24B of the light guide 24 to an arrival point A on the main internal surface 24B of the light guide 24. Said arrival point A corresponding to said impact point X5.

[0419] The distance between the starting point D and the ending point A defines a fourth minimum length LM432 for the absorbing layer 432.

[0420] The absorbent layer 432 has a predefined length L432 greater than or equal to the fourth minimum length LM432.

[0421] As can be seen in [Fig.6], the absorbing layer 432 extends beyond the arrival point A towards the central area of ​​the glazing 412.

[0422] The absorbent layer 432 has a length L432 greater than or equal to the fourth minimum length LM432 and less than or equal to 500% of the fourth minimum length LM432, in particular less than or equal to 400% of the fourth minimum length LM432, preferably less than or equal to 300% of the fourth minimum length LM432, more preferably less than or equal to 200% of the fourth minimum length LM432 and advantageously less than or equal to 150% of the fourth minimum length LM432.

[0423] Optionally, as seen in [Fig.7], the glazing 412 includes an additional absorbing layer 436 extending over the internal surface 24B of the light guide 24 opposite the absorbing layer 432 extending over the main external surface 24A of the light guide 24.

[0424] Thanks to the absorbing layer according to the invention, at least a portion of the incident light rays injected by the light redirection element at an angle strictly less than the predefined internal total refraction limiting angle are absorbed by the absorbing layer. Furthermore, because the absorbing layer has a refractive index substantially equal to the n30 refractive index of the contact layer, the absorption of useful rays is minimized, thereby maximizing the quantity of light rays able to propagate in the light guide. Thus, the absorbing layer according to the invention makes it possible to increase the quantity of rays useful light sources that can be guided in the light guide and then extracted to illuminate an area to be lit while limiting the appearance of the halo phenomenon.

Claims

1. Demands Glazing (12; 112; 212; 312; 412) illuminable for a vehicle, in particular a motor vehicle, intended to be illuminated by at least one lighting device (14; 414) comprising at least one light source (16; 416), the glazing (12; 112; 212; 312; 412) extending along a principal direction of extension (E), the glazing (12; 112; 212; 312; 412) having an external face (12A; 112A), an internal face (12B; 112B) and an edge (12C) connecting the external (12A; 112A) and internal (12B; 112B) faces, the glazing (12; 112; 212; 312; 412) comprising: - an external glass sheet (20; 120), organic or mineral, having an external surface (20A) and an opposing internal surface (20B), the external surface (20A) of the external glass sheet (20; 120) delimiting at least in part the external face (12A; 112A) of the glazing (12; 112; 212; 312; 412), - a light guide (24; 124) adhesively bonded to the outer glass sheet (20; 120), the light guide (24; 124) being delimited by a principal outer surface (24A; 124A) extending at least partially opposite the inner surface (20B) of the outer glass sheet (20; 120) and an opposite principal inner surface (24B; 124B), the light guide (24; 124) being configured to guide at least a portion of the light rays generated by the light source (16; 416) along a principal direction of propagation (P) by total internal reflection at least between said principal outer (24A; 124A) and inner (24B; 124B) surfaces of the light guide (24; 124), a minimum refractive index being defined for the light guide (24; 124), a limiting angle of total internal reflection (0RT) being predefined for the light guide (24; 124), said limiting angle of total internal reflection (0RT) being such that the refracted ray of a light ray propagating in the light guide (24; 124) striking the main external surface (24A; 124A) of the light guide (24; 124) with the predefined limiting angle of total internal reflection (0RT) forms an angle of 90° with the normal to the main external surface (24A) of the light guide (24; 124), - an optical isolation contact layer (30; 130) having an external surface (30A; 130A) and an internal surface (30B; 130B) opposite, the inner surface (30B; 130B) of the optical insulation contact layer (30; 130) extending in contact with a first part of the main outer surface (24A; 124A) of the light guide (24; 124), said optical insulation layer (30; 130) having a refractive index (n30; nno) strictly lower than the minimum refractive index of the light guide (24; 124), - at least one layer of an optically absorbing material (32; 132; 232; 332; 432), said "absorbent layer (32; 132; 232; 332; 432)", extending into a peripheral area of ​​the glazing (12; 112; 212; 312; 412), characterized in that the at least one absorbing layer (32; 132; 232; 332; 432) extends into contact with a second part of the main external surface (24A; 124A) of the light guide (24; 124) or into contact with a part of the main internal surface (24B; 124B) of the light guide (24; 124), and in that the refractive index (n32; n[32]) of the absorbing layer (32;132; 232; 332; 432) is approximately equal to the refractive index (n30; nno) of the optical insulation contact layer (30; 130).;

2. Illuminatable glazing according to claim 1, wherein the light guide (24; 124) comprises at least one sheet (38; 138) of glass forming an internal glass sheet of the glazing (12; 112; 212; 312; 412), the glazing (12; 112; 212; 312; 412) comprising a lamination interlayer adhesively bonding the external glass sheet (20; 120) and the internal glass sheet (38; 138) together, the lamination interlayer extending between the external glass sheet (20; 120) and the internal glass sheet (38; 138).

3. Illuminatable glazing according to claim 2, wherein the lamination interlayer (30, 34; 142, 130, 140, 134) comprises the optical insulation contact layer (30; 130).

4. Illuminatable glazing according to claim 2 or 3, wherein the light guide (124) comprises at least one other layer (142) comprising at least one polymer, said other layer (142) extending at least between the inner glass sheet (38) and the optical insulation contact layer (130), said other layer (142) of the light guide (124) forming at least in part the lamination interlayer (142, 130, 140, 134).

5. Illuminatable glazing according to any one of the preceding claims, wherein the predefined limiting angle of total internal reflection (0RT) depends on the refractive index (n30; nno) of the optical insulation contact layer (30; 130).

6. Illuminatable glazing according to any one of the preceding claims, wherein, in at least one transverse plane substantially perpendicular to the principal extension direction (E), at least one absorbing layer (32; 132; 232; 332; 432; 436) has a predetermined length (L32; Li32; L232; L332; L432) depending on the predetermined limiting angle of total internal reflection (0RT).

7. Illuminatable glazing according to any one of the preceding claims, wherein in at least one transverse plane substantially perpendicular to the principal extension direction (E), the glazing (12; 112; 212; 312; 412) has a predefined injection point (IP) of light rays into said light guide (24; 124), said predefined injection point (IP) being a point located on a portion of a slice (24C) of the light guide (24; 124) when said slice (24C) forms a light ray entry face or on an edge (28D; 128D; 228D) of a face (28B; 128B; 228B) of a light redirection element (28; 128; 228) opposite a light redirection face (28A; 128A; 228A) of said element (28; 128; 228), said edge (28D; 128D; 228D) being the edge closest to a central area of ​​the glazing (12; 112; 212; 312), at least one absorbing layer (32;132) having, in said transverse plane, at least one part extending at the predefined injection point (IP) towards a central area of ​​the glazing (12; 112; 212; 312; 412).;

8. Illuminatable glazing according to claim 7, wherein, in said transverse plane, at least one absorbing layer (32; 132) extends in contact with said second part of the main external surface (24A; 124A) of the light guide (24; 124) at least between a starting point (D) corresponding to the projection of the predefined injection point (IP) onto the main external surface (24A; 124A) of the light guide (24; 124) and an ending point (A) on the main external surface (24A; 124A) of the light guide (24; 124),

9.

10. a reference light ray (RI) being defined for the light guide (24; 124) as a theoretical light ray emitted from the predefined injection point (IP) towards the main internal surface (24B; 124B) of the light guide (24; 124), the reference light ray (RI) having an incident component (CI) originating from the predefined injection point (IP) and striking the main internal surface (24B; 124B) of the light guide (24; 124) at a first point (XI) of the main internal surface (24B; 124B) of the light guide (24; 124) and a reflected component (CR) on the main internal surface (24B; 124B) of the light guide (24; 124) originating from said first point (XI) and intersecting the main external surface (24A; 124A) of the light guide (24; 124) at a second point (X2) by forming the predefined limiting angle of total internal reflection (0RT) with a normal to the main external surface (24A; 124A) of the light guide (24;124), said arrival point (D) corresponding to said second point (X2).; Illuminatable glazing according to claim 7, wherein, in said transverse plane, at least one absorbing layer (332) extends in contact with the main internal surface (24B) of the light guide (24) at least between a starting point (D) corresponding to the projection of the predefined injection point (IP) onto the main internal surface (24B) of the light guide (24) and an ending point (A) on the main internal surface (24B) of the light guide (24), a reference light ray (R3) being defined for the light guide (24) as a theoretical light ray emitted from the predefined injection point (IP) in the direction of the main internal surface (24B) of the light guide (24),the reference light ray (R3) having an incident component (CI) originating from the predefined injection point (IP) and striking the main internal surface (24B) of the light guide (24) at a point (X4) called the "impact point" by forming the predefined limiting angle of total internal reflection (0RT) with a normal to the main external surface (24A) of the light guide (24), said arrival point (A) corresponding to said impact point (X4) on the main internal surface (24B) of the light guide (24). Illuminatable glazing according to claims 2 and 8 or 9, wherein the glass sheet (38; 138) forming the inner glass sheet of the glazing (12; 112; 312) includes an external surface (38A; 138A) oriented towards the external glass sheet (20; 120), the glazing (12; 112; 312) including a light redirection element (28; 128) connected to the external surface (38A; 138A) of the glass sheet (38; 138) forming the internal glass sheet.

11. Illuminatable glazing according to claim 7, wherein, in said transverse plane, the absorbing layer (232; 432) extends in contact with said second part of the main external surface (24A) of the light guide (24) between a starting point (D) corresponding to the projection of the predefined injection point (IP) onto the main external surface (24A) of the light guide (24) and an ending point (A) on the main external surface (24A) of the light guide (24), a reference light ray (R2; R4) being defined for the light guide (24) as a theoretical light ray emitted from the predefined injection point (IP) in the direction of the main external surface (24A) of the light guide (24), the reference light ray (R2; R4) having an incident component (CI) originating from the predefined injection point (IP) and striking the main external surface (24A) of the light guide (24) at a point (X3;X5), called "point of impact", forming the predefined limiting angle of total internal reflection (0RT) with a normal to the main external surface (24A) of the light guide (24), the arrival point (A) corresponding to the point of impact (X3; X5) on the main external surface (24A) of the light guide (24).;

12. Illuminatable glazing according to claim 11, comprising a light redirection element (228), the light redirection element (228) being connected to the inner face of the glazing (212).

13. Illuminatable glazing according to any one of the preceding claims, wherein at least a portion of the main internal surface (24B; 124B) of the light guide (24; 124) is bare and intended to be in contact with a layer of air, in particular the air contained inside the vehicle.

14. Illuminatable glazing according to any one of the preceding claims, comprising a light redirection element (128).

15. Illuminatable glazing according to claim 14, wherein the absorbing layer (132) further extends to the right of the whole of the light redirection element (128).

16. Illuminatable glazing according to any one of the preceding claims, comprising a peripheral masking layer (22) of a mineral material forming, for example, a frame, the absorbing layer (32; 132; 232; 332; 432) having, for example, at least one overlapping portion extending over the masking layer (22).

17. Illuminatable glazing according to any one of the preceding claims, wherein the refractive index (n30; nno) of the optical insulation contact layer (30; 130) is between 1.2 and 1.51, preferably between 1.3 and 1.5, advantageously between 1.37 and 1.49 and for example between 1.37 and 1.

42.

18. Illuminatable glazed assembly (10; 100; 200; 300; 400) comprising an illuminable glazing (12; 112; 212; 312; 412) according to any one of the preceding claims and further comprising at least one illumination device (14; 414) comprising at least one light source (16; 416) intended to illuminate the illuminable glazing (12; 112; 212; 312; 412).

19. Vehicle, in particular motor vehicle, comprising glazing (12; 112; 212; 312; 412) illuminable according to any one of claims 1 to 17 or the glazing assembly (10; 100; 200; 300; 400) illuminable according to claim 18.

Images