Multilayer assembly, particularly for vehicles

Abstract

The invention relates to a multilayer assembly (200), particularly intended for installation inside the passenger compartment (100) of a vehicle, especially a motor vehicle, comprising a light structure (201) including a textile layer (202), said textile layer (202) comprising an overlapping face (203) of textile yarns (206) and an overlapping face (203) of optical fibers (205), the optical fibers (205) being arranged to emit light and the textile yarns (206) being arranged to allow the light emitted by the optical fibers (205) to pass through the overlapping face (203) of textile yarns (206). Abstract figure: Figure 13

Description

Title of the invention: Multilayer assembly, particularly for vehicles

[0001] The present invention relates to a multilayer assembly, particularly intended for installation inside the passenger compartment of a vehicle. The vehicle may be of a land, sea or air type.

[0002] Heating panels are known which comprise a plurality of electrodes configured to deliver heat by Joule effect by supplying an electric current to a conductive coating. See, for example, US2016 / 0059669.

[0003] Furthermore, it is known to use lighting devices in the passenger compartment of motor vehicles. These interior lighting devices are increasingly in demand by automobile manufacturers.

[0004] There is a need for devices that can perform different functions, including heating and lighting functions, and that are relatively compact.

[0005] The invention thus relates to a multilayer assembly, in particular intended to be installed inside the passenger compartment of a vehicle, in particular a motor vehicle, comprising a luminous structure including a textile layer, said textile layer including a face covered with textile yarns and a face covered with optical fibers, the optical fibers being arranged to emit light and the textile yarns being arranged to allow the light emitted by the optical fibers to pass through the face covered with textile yarns.

[0006] The invention makes it possible to have, when lighting and heating functions need to be combined, a combined heating and lighting assembly that is compact, capable of efficiently allowing light and heat to pass through, while guaranteeing these performances regardless of the stacking or superposition of the functional layers that compose it.

[0007] The invention thus proposes to use translucent textile threads on the light structure. In this way, the heating structure can be placed opposite the face comprising these translucent textile threads, and the transmission of light and heat is ensured.

[0008] A textile yarn-covered face is defined as a face of the luminous structure on which textile yarns are predominantly present. An optical fiber-covered face is defined as a face of the luminous structure on which optical fibers are predominantly present.

[0009] According to one aspect of the invention, the optical fibers each have one or more light emission zones towards the outside of the fiber.

[0010] According to one aspect of the invention, these emission zones are on a lateral surface of the optical fiber.

[0011] According to one aspect of the invention, these zones have various shapes, for example a circular zone, an elongated zone, a cross-shaped zone, a zigzag zone...

[0012] According to one aspect of the invention, at least one of the light emission zones has activation reliefs, for example in the form of striations, to send the light out of the optical fiber.

[0013] According to one aspect of the invention, these reliefs, in particular striations, are produced by laser attack or by sandblasting on the optical fiber.

[0014] According to one aspect of the invention, the textile web comprises interlaced textile yarns and optical fibers.

[0015] In one aspect according to the invention, the face covered with textile yarns also has optical fibers, said optical fibers being less present than the textile yarns on said face compared to the textile yarns.

[0016] In one aspect according to the invention, optical fibers are visible on the optical fiber covering face at the interlacing of the optical fiber with a textile yarn, in other words when the textile yarn is superimposed on the optical fiber on said optical fiber covering face.

[0017] In one aspect according to the invention, the optical fiber-covered face also has textile yarns, said textile yarns being less present than optical fibers on said face compared to optical fibers.

[0018] In one aspect according to the invention, optical fibers are visible on the face covered with textile yarns at the interlacing of the optical fiber with a textile yarn, in other words when the optical fiber overlaps the textile yarn on said face covered with textile yarns.

[0019] In one embodiment of the invention, the textile web comprises warp optical fibers woven or knitted with weft textile yarns.

[0020] In another embodiment of the invention, the textile web comprises optical fibers in the weft woven or knitted with textile yarns in the warp.

[0021] In one aspect according to the invention, depending on the weaving or knitting pattern of the textile yarns with the optical fibers, the optical fiber-covered face also has textile yarns, the textile yarns being comparatively less present than the optical fibers. In particular, the textile yarns are visible only at the points where they interlace with the optical fibers.

[0022] In one aspect according to the invention, depending on the weaving or knitting pattern of the textile yarns with the optical fibers, the face covered with textile yarns presents Optical fibers are also present, although they are comparatively less prevalent than textile yarns. Specifically, optical fibers are only visible at the points where they interlace with the textile yarns.

[0023] According to one aspect of the invention, the textile sheet comprises textile yarns arranged in warp and weft according to a plain weave structure.

[0024] According to one aspect of the invention, the optical fibers are pointwise linked to said armature so as to double said armature, the optical fibers being substantially positioned on a surface parallel to the surface defined by the armature.

[0025] According to one aspect of the invention, the armature is flexible, that is to say, capable of taking a predetermined shape by deformation.

[0026] According to one aspect of the invention, the optical fibers are linked to the frame by warp or weft textile yarns.

[0027] According to one aspect of the invention, the textile yarns and optical fibers form a woven sheet.

[0028] According to one aspect of the invention, the textile sheet has a thickness of less than 1 mm, in particular between 0.1 mm and 0.7 mm.

[0029] According to one aspect of the invention, textile yarns comprise yarns made of a natural material such as plant yarns, and / or yarns made of an artificial or synthetic material arranged to allow at least partial transmission of light.

[0030] According to one aspect of the invention, the textile yarns comprise a translucent or transparent material.

[0031] In one aspect according to the invention, the textile yarns comprise a translucent polymer-based material, in particular selected from: polyester, polyamide, polyacrylic, polyurethane, elastane.

[0032] In one aspect according to the invention, the multilayer assembly comprises a heating structure including: - at least one resistive layer arranged to produce heat when an electric current passes through it, this resistive layer being made of a material capable of transmitting light emitted by the luminous structure, - at least two electrodes being in electrical contact with the resistive layer so as to allow an electric current to flow through the resistive layer between these two electrodes.

[0033] According to one aspect of the invention, the multilayer assembly comprises a functional face towards which heat produced by the heating structure and light produced by the lighting structure can be directed, this functional face being configured to diffuse the heat and light thus received towards the outside of the heating and lighting system, for example towards an area of ​​a vehicle's interior.

[0034] The functional face is thus a face of the multilayer assembly on which the heating and lighting functions manifest themselves, for example to heat an area of ​​a vehicle interior and / or to light an area of ​​this interior or create a luminous effect visible from the interior.

[0035] According to one aspect of the invention, at least a region of the heating structure, in particular the entire heating structure, is placed between the functional face and the light structure so that light produced by this light structure passes through the resistive layer of the heating structure before reaching the functional face.

[0036] In one aspect according to the invention, the resistive layer comprises a material capable of transmitting light produced by the light structure. In other words, the resistive layer comprises a material capable of transmitting light passing through the textile yarns via the face covered with textile yarns, said light having been previously emitted by the optical fibers of the light structure.

[0037] According to one aspect of the invention, the resistive layer material contains a transparent conductive oxide (TCO) selected from indium tin oxide (ITO) and zinc oxide (ZnO).

[0038] According to one aspect of the invention, the resistive layer material is an electrically conductive polymer selected from polyphenylene sulfide (PPS) or Pedot-PSS.

[0039] According to one aspect of the invention, the electrodes and the resistive layer of the heating structure are mounted on the textile-fiber-covered face of the light structure. In other words, the resistive layer and the electrodes are printed directly onto the textile-fiber-covered face.

[0040] In one aspect according to the invention, the resistive layer has a thickness between 0.3pm and 1Opm, preferably between 0.5pm and 1pm.

[0041] According to one aspect of the invention, the heating and lighting structures form stacked layers.

[0042] According to one aspect of the invention, the multilayer assembly has a panel shape.

[0043] According to one aspect of the invention, the multilayer assembly is flexible, namely it can be shaped to take a predetermined form.

[0044] According to one aspect of the invention, the heating structure and the lighting structure are fixed to each other.

[0045] According to one aspect of the invention, the heating structure is in contact with the light structure, more particularly with the textile-fiber-covered face of the light structure.

[0046] According to one aspect of the invention, the heating structure and the lighting structure are assembled by lamination.

[0047] According to one aspect of the invention, the light structure includes a light source, in particular in the form of one or more LEDs (light-emitting diodes).

[0048] According to one aspect of the invention, the multilayer assembly comprises a reflective face arranged to reflect the light emitted by the optical fibers, said reflective face facing the optical fiber covering face.

[0049] According to one aspect of the invention, the reflective face comprises a material arranged to reflect light, in particular a white coating or a metallic coating.

[0050] The invention further relates to a vehicle interior component, comprising a multilayer assembly as previously claimed.

[0051] The invention further relates to a vehicle comprising a multilayer assembly as previously claimed.

[0052] Other features, details and advantages of the invention will become apparent from the description given below by way of example in relation to drawings in which:

[0053] - Fig. 1 is a schematic representation of a vehicle passenger compartment automobile equipped with a heating and lighting system according to an embodiment of the invention,

[0054] - Fig. 2 is a schematic, cross-sectional representation of the device heating and lighting according to an example of an embodiment of the invention;

[0055] - Fig. 3 is a schematic representation of a luminous structure according to the invention;

[0056] Fig. 4 is another schematic representation of a luminous structure according to the invention from a top view;

[0057] Fig. 5 is another schematic representation of a luminous structure according to the invention from a side view;

[0058] - Fig. 6 is a schematic representation of a heating structure of the heating and lighting system of the [Fig.2];

[0059] - Fig. 7 is a schematic representation of a heating structure according to another example of the realization of the invention;

[0060] - Fig. 8 is a schematic, cross-sectional representation of a device heating and lighting according to another embodiment of the invention;

[0061] - Fig. 9 is a schematic, cross-sectional representation of a device heating and lighting according to yet another example of an embodiment of the invention;

[0062] - Fig. 10 is a schematic, cross-sectional representation of a device heating and lighting according to yet another example of an embodiment of the invention;

[0063] - Fig. 11 is a schematic, cross-sectional representation of a device heating and lighting according to another embodiment of the invention, incorporating a reflective zone;

[0064] - Fig. 12 is a schematic, cross-sectional representation of a device heating and lighting according to yet another embodiment of the invention, incorporating a reflective zone;

[0065] - Fig. 13 is a schematic representation of an equipped assembly with a heating and lighting device according to an example of an embodiment of the invention, viewed from a face;

[0066] - Fig. 14 is a schematic representation of the textile tablecloth the assembly of [Fig. 13], seen from one side;

[0067] - Fig. 15 is a schematic representation of the textile tablecloth the assembly of [Fig. 13], seen from the opposite face;

[0068] - Fig. 16 is a schematic cross-sectional representation of a fiber optical.

[0069] Figure 1 shows a passenger compartment 100 of a motor vehicle V. The doors 101 and the roof 102 of the passenger compartment are also shown. Passenger seats 103 are also visible.

[0070] In the example described, heating and lighting devices 1 are integrated into the roof 102 of the passenger compartment. These devices 1 can also be integrated into a door 101.

[0071] The heating and lighting device 1 according to the invention can be implemented in different ways.

[0072] In the example illustrated in [Fig.2], the heating and lighting device 1 is integrated into a component 104 fixed to an internal door structure 105, and this component 104 comprises, in a stacked arrangement, successively: - a support bracket 5, which, in the example described, is a structural part made of translucent plastic material, or of transparent plastic material, - a layer of flexible material 6, here a layer of foam, arranged to give the heating and lighting device 1 a soft feel, this layer 6 being able to be omitted if necessary, - a heating structure 7, described in detail below, of the heating and lighting device 1, - a luminous structure 8 capable of emitting visible light, described in detail below, from the heating and lighting device 1, - a decor 9 which can be of textile, leather, wood or plastic type.

[0073] In the example described, the elements 5 to 9 are laminated together before being fixed onto the door structure 105.

[0074] The device 1 includes a functional face 2 towards which heat H produced by the heating structure 7 and light L produced by the lighting structure 8 can be sent, this functional face 2 being configured to diffuse the heat and light thus received towards the outside of the heating and lighting device 1, in the direction of an area of ​​a vehicle interior.

[0075] The functional face 2 is formed on the decoration 9 which is turned towards the vehicle's passenger compartment.

[0076] In the example described with reference to [Fig.2], the heating structure 7 and the light structure 8 are made as two separate layers and assembled together.

[0077] The heating and lighting device 1 has a panel shape and is flexible, namely it can be conformed to take a predetermined shape.

[0078] The luminous structure according to the invention is shown in figures 3 to 5.

[0079] The visible light emitted by the luminous structure 8 is light visible to the eye human.

[0080] Figure 3 shows a luminous structure 8 comprising a flexible guide sheet 110, said sheet comprising a film 111 in its core. This film 111 is capable of receiving light rays through a light injection edge 114 and of reflecting the light rays in the direction along the Ox axis substantially perpendicular to the surface of the flexible guide sheet 111 through a light-emitting face.

[0081] A flexible guide sheet is defined as an optical guiding element in which one dimension is much smaller than the other two dimensions in space, for example, smaller by one or more orders of magnitude. Here, we consider a flexible guide sheet whose thickness along the Ox axis is at least two orders of magnitude smaller than its dimensions along the Oxy plane in which the flexible guide sheet 110 extends.

[0082] The film 111 comprises a set of optical decoupling elements 113 formed by microstructures on one face of the film 111 extending along the Oy axis. The microstructures 113 are capable of reflecting light rays guided in the flexible film 111 outside the flexible guide sheet 110, in particular in a direction along the Ox axis perpendicular to the surface of the sheet 110.

[0083] The film is made of polycarbonate (PC), or polymethyl methacrylate (PMMA), or thermoplastic polyurethane (TUP), or polyethylene terephthalate (PET).

[0084] The flexible film 111 can have a thickness, namely the dimension along the Ox axis, of between 10 and 1000 micrometers. More precisely, the thickness of the flexible film 111 can be between 50 and 1000 micrometers, for example between 100 and 500 micrometers, preferably 150 micrometers. Alternatively, the flexible guide sheet 110 has a thickness of between 10 and 1000 micrometers. More precisely, the thickness of the flexible film 111 can be between 50 and 1000 micrometers, for example between 100 and 500 micrometers, preferably 150 micrometers.

[0085] The aforementioned materials, combined with a low thickness as described above, allow the production of a flexible and transparent film 111. Other materials may be used for the composition of the flexible film 111. However, according to the invention, it is preferable to use deformable and transparent materials.

[0086] The flexible guide sheet 110 further comprises one or two protective layers 112.1 and 112.2, which provide mechanical protection for the flexible film 111. In addition, the protective layers 112.1 and 112.2 may include a UV-resistant treatment, enabling the flexible film 110 to be protected from UV radiation after the microstructures 113 have been etched. Without such UV protection, the pattern projected by the flexible guide sheet 110 is susceptible to degradation over time, particularly when exposed to sunlight.

[0087] Since the guide sheet 110 is flexible, it is not necessarily contained in a plane but can be curved or shaped, depending on the position in which it is placed and the mechanical stresses applied to it.

[0088] The propagation of light rays in the flexible film 111 is done by total internal reflection thanks to the difference between the refractive index of the flexible film 111 and that of at least one adjacent layer, here an adhesive layer applied on at least one face of the flexible film.

[0089] In the illustrated example, the flexible film 111 is joined to the protective layers 112.1, 112.2 by gluing. Specifically, an adhesive layer 115.1, 115.2, here a layer of glue, is located between the flexible film 111 and each protective layer 112.1, 112.2, on both sides of the flexible film 111 to ensure that the protective layers 112.1, 112.2 adhere to the flexible film 111.

[0090] The chosen adhesive is transparent and has a different refractive index than the flexible film so as to allow total internal reflection within the flexible film 111. In other words, due to the difference in refractive index, the light rays propagating in the flexible film undergo total internal reflection upon encountering it. with the interface between the flexible film and the adhesive layer at an angle of incidence lower than normal incidence. Thus, the guide sheet 110 is suitable for guiding light by total internal reflection of that light, for example from an input area, here slice 114, to an output area.

[0091] A coating of optical decoupling elements 113 formed by microstructures can be applied to one of the faces of the flexible film 111, in particular the light-emitting face, or integrated into the flexible film 111. The coating of microstructures 113 may, in particular, have a thickness along the Ox axis of less than 20 micrometers. These optical decoupling elements are configured 113 to reflect light directionally, in particular at an angle substantially perpendicular to the emission face of the flexible guide sheet 110.

[0092] Such microstructures 113 have, for example, a general bump-like shape, on which light rays are reflected in a direction along the Ox axis. Such microstructures 113 are suitable for causing the light rays exiting the flexible film 111 to form a pattern. To this end, the microstructures 113 are, for example, etched by ultraviolet printing, so as to reflect the light rays through the surface of the flexible film according to the desired pattern. For example, the microstructures 113 are distributed so as to project a homogeneous light over the entire surface of the flexible film 111. This is referred to as a homogeneous pattern in what follows.

[0093] Microstructures 113 are understood to be structures, or irregularities in the flexible film, whose dimensions are less than a few micrometers. Microstructures thus also include nanometric structures. Such microstructure sizes 113 make it possible to ensure high transparency of the flexible film 111. In particular, a transparency of around 97% can be practically achieved by using microstructures 113.

[0094] Alternatively, the flexible guide sheet can be semi-transparent. In this embodiment, the transparency is greater than or equal to 80%.

[0095] Advantageously, the microstructures s 113 can be distributed along the Oy axis of such that the linear density of microstructures 113 is proportional to the distance from the light injection channel 114 through which the light rays injected by an injection element 120 are received. In other words, the further the microstructures 113 are from the light injection channel 114, the more densely they are grouped. This distribution advantageously ensures a homogeneous distribution along the Y-axis of the light intensity of the pattern emitted by the flexible guide sheet 110.

[0096] As illustrated in [Fig. 4], the flexible film 111 may comprise a mixing zone 111.2 and a light-emitting zone 111.1 provided with the microstructures 113. The mixing zone 111.2 is positioned upstream of the light emission zone according to the direction of propagation of the light rays within the guiding sheet 110. The light-emitting zone 111.1 is integrated into a region 1110 of the light guide sheet 110. The light injected into the light guide sheet 110 via the slice 114 is mixed in the light mixing region 111.2 to obtain better light homogeneity. The light then propagates in the light-emitting zone 111.1 through which the light exits the light guide sheet 110 in the Ox direction.

[0097] The light structure 8 comprises: - at least one group 120 of 120.1 light injection elements, and - a light guiding sheet 110 forming a flexible surface film.

[0098] Group 120 and the light injection elements 120.1 are shown in Figures 4 and 5.

[0099] The light injection elements form bands.

[0100] In a non-limiting embodiment, when there are multiple groups 120, the number of groups 120 is between two and twenty. When there are multiple groups 120, each group 120 is configured to illuminate a different region 1110 in the light guide sheet 110. Illumination is understood to mean the act of transmitting or injecting light into a defined region.

[0101] A group 120 comprises one or more light injection elements 120.1. In this example, a group 120 comprises several light injection elements 120.1. The number of light injection elements 120.1 that can be included in a group is therefore between three and ten. More specifically, in the example in Figures 3 to 5, the flexible guide sheet 11 comprises a group 120 with ten light injection elements 120.1.

[0102] The group 120 is coupled with at least one light source 20 so as to receive the light rays R emitted by said source in each of the light injection elements.

[0103] Since the light injection elements came from the material with the light guide sheet 110, the light rays R will propagate by total internal reflection in the light injection elements 120.1 of the group 110 so as to bring light to the light guide sheet 110 which is adjacent and attached to the light injection elements 120.1 and which will thus illuminate the region or regions 1110 of the light guide sheet 110.

[0104] As illustrated in Figures 4 and 5, a light injection element 120.1, also called a coupling bar 120.1, or light bar 120.1, or simply bar 120.1, is configured to receive the light rays R emitted by the light source 20 which propagate and are totally reflected in said element light injection element 120.1. The light injection element 120.1 has a square cross-section.

[0105] Figure 5 illustrates the flexible guide sheet of Figure 3 or 4 with the light injection elements 120.1 of group 120 unfolded. In Figure 5, the light injection element 120.1 has a length Lh and a width W. In a non-limiting embodiment, the length Lh is between 100 and 500 mm. In a non-limiting embodiment, the width W is between 1 and 20 mm.

[0106] We will now describe, in more detail, the heating structure 7.

[0107] As illustrated in [Fig.6], this heating structure 7 comprises a resistive layer 51 arranged to produce heat when this layer is traversed by an electric current.

[0108] The heating structure 7 further comprises two distribution electrodes 52, which are in electrical contact with the resistive layer 51 so as to allow an electric current to flow through the resistive layer 51 between these two electrodes 52.

[0109] These electrodes 52 have parallel sections 53 between which is the resistive layer 51, and transverse sections 54 which are connected to electrical supply wires 55.

[0110] The electrodes 52 and the resistive layer 51 are carried on a substrate 58 made of a flexible material capable of taking a predetermined shape by deformation, this substrate being in particular also extensible.

[0111] The electrodes 52 are deposited on the substrate 58 by printing, screen printing or lamination of several materials.

[0112] The electrodes 52 are made of conductive material, in particular metallic such as ink charged with conductive particles, in particular silver or copper particles.

[0113] Furthermore, the resistive layer 51 is deposited on the substrate by printing, screen printing or lamination of several materials.

[0114] The resistive layer 51 is present on one face of the substrate 58, opposite the luminous structure 8.

[0115] The nonwoven fabric may comprise a mixture of polypropylene and / or polyester fibers. Other fibers may be used, for example natural fibers.

[0116] Alternatively, the substrate 58 can be a flexible plastic sheet or a foam such as TPU (thermoplastic polyurethane).

[0117] The substrate 58 has a thickness of less than 1 mm and a surface area of ​​at least 10 cm², or at least 50 cm², or at least 500 cm². Advantageously, the substrate thickness is less than 500 micrometers, preferably less than 200 micrometers, including the terminal.

[0118] In another example illustrated in [Fig.7], the heating structure 7 can be replaced, in the heating and lighting device 1, by a heating structure 70 which includes an electrode array 71 as described below.

[0119] This electrode network 71 comprises two straight distribution electrodes 72 and a plurality of contact electrodes 73 supplied with electric current by the distribution electrodes 72.

[0120] The distribution electrodes 72 can be viewed as “parent” electrodes and the contact electrodes 73 as “child” electrodes.

[0121] Several contact electrodes 73 are connected to the same distribution electrode 72, at a right angle.

[0122] The contact electrodes 73 are parallel to each other, and form pairs each associated with a resistive layer 75.

[0123] These layers 75 are separated from each other and form several heating zones, for example with repeating patterns.

[0124] In another example not shown, the distribution electrodes 72 may have different shapes, including curved with rounded edges.

[0125] In another example of an implementation of the invention illustrated in [Fig.8], the resistive layer 51 and the electrodes 52 of the heating structure 7 are carried by the light structure 8.

[0126] The resistive layer 51 and the electrodes of the heating structure 7 are inks that have been deposited, for example by printing or screen printing, on the light structure 8.

[0127] In this case, the heating structure 7 may be without its own substrate, the light structure then serving as a substrate for the resistive layer 51 of the heating structure 7.

[0128] The electrodes 52 and the resistive layer 51 are formed on one face of the luminous structure 8, face which is opposite to the functional face 2.

[0129] In general, the device 1 can be used to form a component 104 selected from one of the following passenger compartment components: - a component designed to be integrated into a vehicle door, - a component designed to be integrated into a dashboard, - a component for cladding a cellar door, - a component for the roof lining or passenger compartment roof, - an armrest trim component, - a component of a glove box, - a pillar cladding component.

[0130] Fig. 1 shows the use case in a vehicle roof.

[0131] The passenger compartment component 104 which includes the heating and lighting device is independent of a seat 103 of the vehicle.

[0132] The passenger compartment component 104 which includes the heating and lighting device 1 is arranged to heat by thermal radiation or by thermal conduction or thermal contact, and not by heating by heat transported by air in forced motion within the passenger compartment.

[0133] In another example of an implementation of the invention, illustrated in [Fig.9], the passenger compartment component 130 comprises successively the following elements: - a support bracket 5, which, in the example described, is a structural part made of translucent plastic material, or of transparent plastic material, - a heating structure 7 of the heating and lighting device 1, - a luminous structure 8 capable of emitting visible light, - a layer of flexible material 6, here a layer of foam, arranged to to give the heating and lighting device 1 a soft feel to the touch, this layer 6 being able to be omitted where appropriate, - a decor 9 which can be of textile, leather, wood or plastic type.

[0134] In this configuration, layer 6 is adjacent to decor 9.

[0135] In another example of an implementation of the invention, illustrated in [Fig. 10], the passenger compartment component 140 comprises successively the following elements: - a heating structure 7 of the heating and lighting device 1, - a luminous structure 8 capable of emitting visible light, - a support bracket 5, which, in the example described, is a piece of structure made of translucent plastic material, or of transparent plastic material, - a layer of flexible material 6, here a layer of foam, arranged to give the heating and lighting device 1 a soft feel, this layer 6 being able to be omitted if necessary, - a decor 9 which can be of textile, leather, wood or plastic type.

[0136] In all embodiments of the invention, the light structure 8 is placed between the heating structure 7 and the functional face 2.

[0137] We will now describe other embodiments according to the invention in which the heating and lighting device includes a reflective zone 40 arranged to reflect light produced by the light structure 8 towards the functional face 2.

[0138] In the example illustrated in [Fig. 11], the reflective area 40 is present between the light structure 8 and the heating structure 7.

[0139] The reflective area 40 extends continuously, in relation to the entire luminous structure 8.

[0140] In the example of [Fig. 11], the reflective area 40 is formed by a reflective layer 41, here of white paint, capable of reflecting light produced by the light structure 8.

[0141] This reflective layer 41 is deposited on the heating structure 7.

[0142] This reflective layer 41 extends, at least in part, over the resistive layer 51 of the heating structure 7.

[0143] Thus, for example, white paint can be deposited onto the ink forming the resistive layer 51, this ink itself being present on a substrate 58. The reflective area 40 can be manufactured simultaneously with the heating structure 7, as an additional layer on this heating structure. This allows for a relatively simple manufacturing process for the reflective area and provides a wide choice of materials for the reflective layer.

[0144] In another embodiment of the invention illustrated in [Fig.12], the reflective zone 40 is formed by the resistive layer 51 of the heating structure 7, which resistive layer 51 contains compounds to perform the heating function and compounds to perform the light reflection function.

[0145] The resistive layer 51 can thus, for example, contain a resistive ink mixed with reflective compounds such as a white coloured material.

[0146] The advantage of this method is that it avoids the need for an additional layer to perform the light reflection function. The resistive layer 51 performs the dual function of heating and reflection.

[0147] Figures 13 to 15 describe a multilayer assembly 200, intended to be installed inside the passenger compartment of a motor vehicle, comprising a light structure 201 having a textile layer 202, said textile layer 202 comprising a face covering 203 of textile yarns 206 and a face covering 204 of optical fibers 205, the optical fibers 205 being arranged to emit light and the textile yarns 206 being arranged to allow the light emitted by the optical fibers 205 to pass through the face covering textile yarns 203.

[0148] The invention thus proposes to use translucent textile yarns 206 on the light structure 201. In this way, a heating structure 7 can be placed opposite the face comprising these translucent textile yarns 206 and the transmission of light and heat is ensured.

[0149] By textile yarn overlay face 203, we mean a face of the luminous structure 201 on which the textile yarns 206 are predominantly present. By optical fiber overlay face 204, we mean a face of the luminous structure 201 on which the optical fibers 205 are predominantly present.

[0150] As can be seen in [Fig. 16], the optical fibers 205 each have one or more light emission zones 209 to the outside of the fiber. These emission zones 209 are on a lateral surface of the optical fiber 205.

[0151] These zones 209 have various shapes, for example a circular zone, an elongated zone, a cross-shaped zone, a zigzag zone. At least one of the light-emitting zones 209 has activation features 214, for example in the form of striations, to direct the light out of the optical fiber 205.

[0152] These reliefs 214, in particular striations, are produced by laser attack or by sandblasting on the optical fiber 205.

[0153] The textile web 202 comprises interlaced textile yarns 206 and optical fibers 205.

[0154] The face with textile yarn covering 203 also has optical fibers 205, said optical fibers 205 being less present than textile yarns 206 on said face compared to textile yarns 206.

[0155] Textile yarns 206 are visible on the optical fiber covering face 204 at the interlacing of the optical fiber 205 with a textile yarn 206, in other words when the textile yarn 206 is superimposed on the optical fiber 205 on said optical fiber covering face 204.

[0156] The optical fiber covering face 204 also has textile yarns 206, said textile yarns 206 being less present than optical fibers 205 on said face compared to optical fibers 205.

[0157] Optical fibers 205 are visible on the textile yarn covering face 203 at the interlacing of the optical fiber 205 with a textile yarn 206, in other words when the optical fiber 205 overlaps the textile yarn 206 on said textile yarn covering face 203.

[0158] In one embodiment of the invention, the textile web 202 comprises optical fibers 205 in warp woven or knitted with textile yarns 206 in weft.

[0159] In another embodiment of the invention, the textile web 202 comprises optical fibers 205 in the weft woven or knitted with textile yarns 206 in the warp.

[0160] Depending on the weaving or knitting pattern of the textile yarns 206 with the optical fibers 205, the optical fiber 204 covering face also has textile yarns 206, the textile yarns 206 being comparatively less present than the optical fibers 205. In particular, the textile yarns 206 are visible only at the interlacings with the optical fibers 205.

[0161] Depending on the weaving or knitting pattern of the textile yarns 206 with the optical fibers 205, the face covered with textile yarns 203 also has optical fibers 205, the optical fibers 205 being comparatively less present than textile threads 206. In particular, optical fibers 205 are visible only at the interlacing with textile threads 206.

[0162] The textile web 202 comprises textile yarns 206 arranged in warp and weft 219 according to a plain weave structure. The optical fibers 205 are attached at specific points to said structure so as to double said structure, the optical fibers 205 being substantially positioned on a surface parallel to the surface defined by the structure. The structure is flexible, that is to say, capable of assuming a predetermined shape by deformation.

[0163] The optical fibers 205 are linked to the armature by textile warp yarns or weft yarns.

[0164] The textile yarns 206 and the optical fibers 205 form a woven web 202.

[0165] The textile tablecloth 202 has a thickness of less than 1 mm, in particular between 0.1 mm and 0.7 mm.

[0166] Textile yarns 206 include yarns in a natural material such as plant yarns, and / or yarns in an artificial or synthetic material arranged to allow at least partial transmission of light.

[0167] Textile yarns 206 comprise a translucent or transparent material.

[0168] Textile yarns 206 comprise a translucent polymer-based material, specifically chosen from: polyester, polyamide, polyacrylic, polyurethane, elastane.

[0169] In the example described, the multilayer assembly 200 includes a heating structure 7 such as that described in the preceding examples.

[0170] 'multilayer assembly 200 includes a functional face 235 towards which the heat produced by the heating structure 7 and the light produced by the lighting structure 201 can be sent, this functional face 235 being configured to diffuse the heat and light thus received towards the outside of the heating and lighting device, for example towards an area of ​​a vehicle interior.

[0171] The functional face 235 is thus a face of the multilayer assembly 200 on which the heating and lighting functions are manifested, for example to heat an area of ​​a vehicle interior and / or to light an area of ​​this interior or create a luminous effect visible from the interior.

[0172] At least one region of the heating structure 7, in particular the entire heating structure 7, is placed between the functional face 235 and the light structure 201 such that the light produced by this light structure 201 passes through the resistive layer 51 of the heating structure 7 before reaching the functional face 235. [Fig. 13] is a top view of the multilayer assembly 200.

[0173] The resistive layer 51 includes a material capable of allowing the light produced by the light structure 201 to pass through. In other words, the resistive layer 51 includes a material capable of allowing the light passing through the textile yarns 206 through the face covered with textile yarns 203, said light having been previously emitted by the optical fibers 205 of the light structure 201 to pass through.

[0174] The resistive layer material 51 contains a transparent conductive oxide, selected from indium tin oxide (ITO) and zinc oxide (ZnO).

[0175]

[0176] The material of the resistive layer 51 is an electrically conductive polymer, selected from polyphenylene sulfide (PPS) or Pedot-PSS.

[0177] The electrodes 52 and the resistive layer 51 of the heating structure 7 are carried on the textile yarn-covered face 203 of the light structure 201. In other words, the resistive layer 51 and the electrodes 52 are printed directly on the textile yarn-covered face 203.

[0178] The resistive layer 51a has a thickness between 0.3 pm and 10 pm, preferably between 0.5 pm and 1 pm.

[0179] The heating structure 7 and the light structure 201 form stacked layers.

[0180] The multilayer assembly 200 has a panel shape.

[0181] The 200 multilayer assembly is flexible, namely it can be shaped to to take a predetermined form.

[0182] The heating structure 7 and the lighting structure 201 are joined together.

[0183] The heating structure 7 is in contact with the light structure 201, more particularly with the textile yarn-covered face 203 of the light structure 201.

[0184] The heating structure 7 and the lighting structure 201 are assembled by lamination.

[0185] The light structure 201 includes a light source 247, in particular in the form of one or more LEDs (light-emitting diodes).

[0186] Optionally the multilayer assembly 200 includes a reflective face arranged to reflect the light emitted by the optical fibers 205, said reflective face facing the optical fiber covering face 204. The reflective face includes, for example, a material arranged to reflect light, in particular a white coating or a metallized coating 251.

[0187] The features of the different embodiments of the invention described above can be combined with each other, if appropriate.

Claims

Demands

1. Multilayer assembly (200), in particular intended to be installed inside a passenger compartment (100) of a vehicle, in particular of a motor vehicle, comprising a light structure (201) having a textile layer (202), said textile layer (202) comprising a face covering (203) of textile yarns (206) and a face covering (203) of optical fibers (205), the optical fibers (205) being arranged to emit light and the textile yarns (206) being arranged to allow the light emitted by the optical fibers (205) to pass through the face covering (203) of textile yarns (206).

2. Multilayer assembly (200) according to the preceding claim, wherein the textile web (202) comprises interlaced textile yarns (206) and optical fibers (205).

3. Multilayer assembly (200) according to any one of the preceding claims, wherein the textile yarn (206) covering face (203) also has optical fibers (205), said optical fibers (205) being, comparatively to the textile yarns (206), less present than the textile yarns (206) on said face, and in particular optical yarns are visible on the optical fiber (205) covering face (203) at the interlacing of the optical fiber (205) with a textile yarn (206).

4. Multilayer assembly (200) according to any one of the preceding claims, wherein the optical fiber (205) covering face (203) also has textile yarns (206), said textile yarns (206) being comparatively less present than the optical fibers (205) on said face, and in particular optical fibers (205) are visible on the textile yarn (206) covering face (203) at the interlacing of the optical fiber (205) with a textile yarn (206).

5. Multilayer assembly (200) according to any one of the preceding claims, wherein the textile web (202) comprises textile yarns (206) arranged in warp and weft (219) according to a plain weave structure.

6. A multilayer assembly (200) according to any one of the preceding claims, wherein the textile yarns (206) and the optical fibers (205) form a woven web (202), and in particular the textile web (202) has a thickness of less than 1 mm, in particular between 0.1 mm and 0.7 mm.

7. Multilayer assembly (200) according to any one of the preceding claims, wherein the textile yarns (206) comprise yarns in a natural material such as plant yarns, and / or yarns in an artificial or synthetic material arranged to allow at least partial transmission of light, and in particular the textile yarns (206) comprise a translucent or transparent material.

8. Multilayer assembly (200) according to any one of the preceding claims, wherein the multilayer assembly (200) comprises a heating structure (70) having: - at least one resistive layer (51) arranged to produce heat when an electric current passes through this layer, this resistive layer (51) being made of a material capable of allowing light emitted by the light structure (201) to pass through, - at least two electrodes being in electrical contact with the resistive layer (51) so as to allow an electric current to flow through the resistive layer (51) between these two electrodes.

9. A multilayer assembly (200) according to any one of the preceding claims, wherein the multilayer assembly (200) has a functional face (235) towards which heat produced by the heating structure (70) and light produced by the light structure (201) can be directed, this functional face (235) being configured to diffuse the heat and light thus received outwards from the heating and lighting device, for example towards an area of ​​a vehicle interior (100), and in particular at least one region (1110) of the heating structure (70), in particular the entire heating structure (70), is placed between the functional face (235) and the light structure (201) such that light produced by this light structure (201) passes through the resistive layer (51) of the heating structure (70) before reaching the functional face (235).

10. A multilayer assembly (200) according to any one of the preceding claims, wherein the resistive layer (51) comprises a material capable of transmitting light produced by the structure 20 luminous (201), in particular the material of the resistive layer (51) contains a transparent conductive oxide (TCO) selected from indium tin oxide (ITO) and zinc oxide (ZnO).

11. Vehicle interior component (100), comprising a multilayer assembly (200) according to any one of the preceding claims.

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