Interactive comfort system, especially for vehicles

Abstract

The invention relates to an interactive comfort system (400), in particular intended to be installed inside a passenger compartment of a vehicle, in particular a motor vehicle, the system comprising: a heating structure (401) comprising: at least one resistive layer (402) arranged to produce heat when this layer is traversed by an electric current, this resistive layer being in particular a carbon-based sheet deposited on a substrate, at least two electrodes in electrical contact with the resistive layer (402) so as to allow an electric current to flow through the resistive layer between these two electrodes, a capacitive sensor (403) arranged to detect, in a detection zone (404), a presence of a part of a passenger, for example an arm, an elbow, a hand or a finger (FG) of the passenger, the capacitive sensor comprising at least one electrical armature forming a capacitive electrode (405). Abstract figure: Figure 9

Description

Title of the invention: Interactive comfort system, in particular for vehicles

[0001] The present invention relates to an interactive comfort system, in particular for a vehicle. The vehicle may be of the 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 electric current to a conductive coating. For example, reference may be made to document US2016059669.

[0003] In particular, there is a need to enable the passenger to manage the desired thermal comfort in a user-friendly and intuitive manner, thanks to greater interactivity.

[0004] The invention thus relates to an interactive comfort system, in particular intended to be installed inside the passenger compartment of a vehicle, in particular a motor vehicle, the system comprising: - a heating structure comprising: • at least one resistive layer arranged to produce heat when this layer is traversed by an electric current, this resistive layer being in particular a carbon-based sheet deposited on a substrate, • at least two electrodes in electrical contact with the resistive layer so as to allow an electric current to flow through the resistive layer between these two electrodes, - a capacitive sensor arranged to detect, in a detection zone, a presence of a part of a passenger, for example an arm, an elbow, a hand or a finger of the passenger, the capacitive sensor comprising at least one electrical armature forming a capacitive electrode, system in which the electrical armature and the heating structure form a stack in which the electrical armature is arranged between the resistive layer and the detection zone.

[0005] Thanks to the invention, it is possible to integrate, in the same system, the heating structure and the elements which allow its control. Thus, it is possible to have a more compact and more intuitive system to use. The use of a capacitive sensor, which can be very thin, stacked on the heating structure, is particularly advantageous because its integration can be done without generating excessive bulk, in particular without generating excessive extra thickness.

[0006] According to one aspect of the invention, the electrical armature of the capacitive sensor is formed on a support, for example a flat one, in particular which is flexible.

[0007] According to one aspect of the invention, this support comprises a film made of electrically insulating material, for example based on plastic, in particular PET (Polyethylene terephthalate).

[0008] According to one aspect of the invention, the frame is obtained by screen printing or printing on the support.

[0009] According to one aspect of the invention, the capacitive sensor comprises a plurality of armatures.

[0010] According to one aspect of the invention, the system is arranged to generate an electrical control signal for heating the resistive layer of the heating structure, this electrical control signal being configured to operate the heating structure alternately in heating mode and in electrical protection mode in which the intensity of an electric field between the resistive layer of the heating structure and the electrical armature of the capacitive sensor is actively reduced using the control signal.

[0011] In the absence of such an electrical protection mode, a strong electric field may appear between the resistive layer of the heating structure and the electrical armature of the capacitive sensor, which has the consequence of generating a strong parasitic capacitance which would distort the measurement of the capacitance between the electrical armature of the capacitive sensor and the part of the human body.

[0012] Thanks to the invention, in the protection mode, the intensity of the electric field between the resistive layer of the heating structure and the electrical armature of the capacitive sensor is reduced, which has the consequence of having a low parasitic capacitance on the side of the resistive layer of the heating structure.

[0013] The invention thus makes it possible to guarantee good accuracy of the capacitive measurement by the capacitive sensor. This makes it possible, for example, to accurately detect the approach of a part of the human body, for example a finger or a hand, to the heating structure.

[0014] The invention further makes it possible to use this resistive layer as a shield against components, for example a door panel, a chassis, electrical harnesses, located behind this resistive layer, components which would be likely to generate electrical disturbances against the electrical armature of the capacitive sensor. The invention makes it possible to avoid using an additional shield element which would be placed within the stack, which would increase the overall cost and could affect the quantity of heat transmitted by the resistive layer.

[0015] According to one aspect of the invention, in heating mode of the heating structure, the control signal is a PMW signal whose duty cycle is adjustable according to the required heating power.

[0016] According to one aspect of the invention, in electrical protection mode, the control signal of the heating structure is identical to the control signal of the capacitive sensor.

[0017] These control signals allow in particular voltage control.

[0018] This synchronization makes it possible to reduce the intensity of the electric field between the resistive layer of the heating structure and the electrical armature of the capacitive sensor.

[0019] According to one aspect of the invention, the system comprises a follower amplifier configured to produce a copy of the signal from the capacitive sensor, this copied signal being applied to the heating structure.

[0020] According to one aspect of the invention, an electrical power control module associated with the heating structure is configured to control, in heating mode, two switches on the basis of a PWM control signal.

[0021] In protection mode, at least one of these two switches is open.

[0022] According to another embodiment of the invention, the system comprises an in switch, in particular formed by a transistor, associated with the capacitive sensor, and another switch, in particular formed by a transistor, at the input of the heating structure, these switches being configured to be controlled, in protection mode, in a synchronized manner, so as to apply to the heating structure the same control signal as the capacitive sensor.

[0023] According to one aspect of the invention, the two aforementioned switches are controlled by an electrical power control module associated with the heating structure.

[0024] According to one aspect of the invention, the resistive layer of the heating structure does not intervene in the capacitive detection carried out by the capacitive sensor.

[0025] According to one aspect of the invention, the capacitive sensor is arranged to acquire a setting temperature entered by a passenger, and a control unit is arranged to deliver a set temperature value as a function of this setting temperature entered by the passenger.

[0026] According to one aspect of the invention, capacitive electrodes form a sliding control bar, namely these capacitive electrodes are aligned, side by side with a small space between them, in a rectilinear row.

[0027] According to one aspect of the invention, the heating structure is part of a heating and lighting device such as below.

[0028] According to one aspect of the invention, the heating and lighting device comprises a functional face towards which heat produced by the heating structure and light produced by the light structure can be sent, this functional face being configured to diffuse the heat and light thus received towards the outside of the heating and lighting device, in the direction of example of an area of ​​a vehicle interior.

[0029] The functional face is thus a face of the heating and lighting device on which the heating and lighting functions are manifested, for example to heat an area of ​​a vehicle passenger compartment and / or to illuminate an area of ​​this passenger compartment or to create a light effect visible from the passenger compartment.

[0030] According to one aspect of the invention, the material of the resistive layer contains a transparent conductive oxide (TCO) chosen from indium-tin oxide (ITO) and zinc oxide (ZnO).

[0031] According to one aspect of the invention, at least one region of the heating structure, in particular the entire heating structure, is placed between the functional face and the luminous structure so that light from this luminous structure passes through the resistive layer of the heating structure before reaching the functional face.

[0032] According to one aspect of the invention, the heating and luminous structures form stacked layers.

[0033] According to one aspect of the invention, the heating and lighting device has a panel shape.

[0034] According to one aspect of the invention, the heating and lighting device is flexible, namely it can be shaped to take a predetermined shape.

[0035] According to one aspect of the invention, the heating structure and the light structure are integral with each other.

[0036] According to one aspect of the invention, the heating structure is in contact with the luminous structure.

[0037] According to one aspect of the invention, the heating structure and the light structure are assembled by lamination.

[0038] According to one aspect of the invention, the light structure comprises a light source, in particular in the form of one or more LEDs (light-emitting diodes).

[0039] The visible light emitted by the light structure is light visible to the human eye. This light which passes through the resistive layer produces an effect perceptible to the human eye and contributes, for example, to the decoration of the passenger compartment and / or the atmosphere in the passenger compartment.

[0040] According to one aspect of the invention, the light structure comprises a light engine.

[0041] According to one aspect of the invention, the light engine is an electronic device, in particular a printed circuit device, comprising one or more LEDs (light-emitting diodes) and at least one light guide for guiding the light emitted by the LED(s).

[0042] According to one aspect of the invention, the light guide of the light engine comprises a plate in which light can propagate, this plate comprising at least one light emission face.

[0043] According to one aspect of the invention, the plate has, at least locally, a planar shape, and the light emission face is, at least locally, planar.

[0044] According to one aspect of the invention, the plate has a complex shape different from a flat shape.

[0045] According to one aspect of the invention, the light guide plate extends along a curved surface.

[0046] According to one aspect of the invention, the plate is made of plastic-based material.

[0047] According to one aspect of the invention, the plate is manufactured with a predetermined shape, namely that it does not deform or does not deform substantially when it is integrated into the heating and lighting device.

[0048] According to one aspect of the invention, the plate has two faces separated by the thickness of the plate, one of these faces having optical activation reliefs arranged to cause the deflection of the light towards the light emission face which is opposite the face on which the reliefs are made.

[0049] According to one aspect of the invention, the plate forms a surface light source, with homogeneous or heterogeneous light diffusion.

[0050] According to one aspect of the invention, the light emission face is opposite the heating structure.

[0051] According to one aspect of the invention, the luminous structure comprises a textile sheet.

[0052] According to one aspect of the invention, the textile sheet comprises interlaced textile yarns and optical fibers.

[0053] According to one aspect of the invention, the textile threads comprise threads in a natural material such as plant threads, and / or threads in an artificial or synthetic material.

[0054] In an exemplary embodiment of the invention, the textile sheet comprises warp optical fibers woven with weft textile yarns.

[0055] In another embodiment of the invention, the textile sheet comprises optical fibers in weft woven with textile yarns in warp.

[0056] According to one aspect of the invention, the textile sheet comprises textile threads arranged in warp and weft according to a canvas-type reinforcement.

[0057] According to one aspect of the invention, the optical fibers are punctually 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.

[0058] According to one aspect of the invention, the frame is flexible, that is to say capable of taking a predetermined shape by deformation.

[0059] According to one aspect of the invention, the optical fibers are linked to the reinforcement by textile warp threads or weft threads.

[0060] According to one aspect of the invention, the textile yarns and the optical fibers form a woven sheet.

[0061] 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.

[0062] According to one aspect of the invention, the optical fibers each comprise one or more zones for emitting light towards the outside of the fiber.

[0063] According to one aspect of the invention, these emission zones are on a lateral surface of the optical fiber.

[0064] 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, etc.

[0065] These emission zones can be perceived from the passenger compartment as points or spots or light patterns.

[0066] According to one aspect of the invention, at least one of the light emission zones comprises activation reliefs, for example in the form of grooves, for sending the light out of the optical fiber.

[0067] According to one aspect of the invention, these reliefs, in particular grooves, are produced by laser attack or by sandblasting on the optical fiber.

[0068] According to one aspect of the invention, the heating structure comprises an electrode network comprising a plurality of distribution electrodes and a plurality of contact electrodes supplied with electric current by the distribution electrodes.

[0069] The distribution electrodes can be seen as “parent” electrodes and the contact electrodes as “child” electrodes.

[0070] According to one aspect of the invention, the contact electrodes are, at least for some of them, in particular for all the contact electrodes of the electrode network, parallel to each other.

[0071] According to one aspect of the invention, the electrode network comprises distribution electrodes arranged to conduct electric current from an electrical source to the contact electrodes, several contact electrodes being connected to the same distribution electrode.

[0072] According to one aspect of the invention, at least one of the distribution electrodes is rectilinear over at least part of its length, and the contact electrodes which are associated with this distribution electrode are connected, for example perpendicularly, to this distribution electrode.

[0073] According to one aspect of the invention, the distribution electrodes may have different shapes, in particular curved with rounded edges.

[0074] The distribution electrodes may or may not be parallel to each other.

[0075] According to one aspect of the invention, the electrode network comprises at least two distribution electrodes which are parallel to each other over at least part of their length, and their associated contact electrodes are arranged between these two distribution electrodes and are alternated with an inter-distance which decreases in relation to the decrease in the voltage present between the pairs of electrodes so as to maintain the electrical power between the pairs of contact electrodes substantially uniform.

[0076] According to one aspect of the invention, the electrodes and the resistive layer are carried on a substrate made of a flexible material capable of taking a predetermined shape by deformation, this substrate being in particular also extensible.

[0077] According to one aspect of the invention, the resistive layer is deposited on the substrate, and is in the form of a sheet, in particular an ink sheet. This sheet is in particular of substantially constant thickness over its entire surface area.

[0078] According to one aspect of the invention, the electrodes are deposited on the substrate by printing, screen printing or lamination of several materials.

[0079] According to one aspect of the invention, the resistive layer is deposited on the substrate by printing, screen printing or lamination of several materials.

[0080] According to one aspect of the invention, the resistive layer is present on one face of the substrate.

[0081] According to one aspect of the invention, the resistive layer is arranged opposite the functional face of said device.

[0082] According to one aspect of the invention, the substrate is of the textile type, woven or knitted, or of the non-woven type.

[0083] This nonwoven may comprise a mixture of polypropylene fibers and / or polyester fibers. Other fibers may be used, for example natural fibers.

[0084] The threads forming the substrate may or may not be extensible.

[0085] According to one aspect of the invention, the substrate may be a flexible plastic sheet or a foam such as TPU (thermoplastic polyurethane).

[0086] According to one aspect of the invention, the substrate has a surface area of ​​at least 10 cm2, or at least 50 cm2, or at least 500 cm2.

[0087] According to one aspect of the invention, the electrodes are made of conductive material, in particular metallic material such as ink loaded with conductive particles, in particular silver or copper particles.

[0088] According to one aspect of the invention, the electrodes are metallic adhesive tapes, for example made of copper.

[0089] According to one aspect of the invention, the resistive layer is a continuous layer.

[0090] Alternatively, the resistive layer comprises a plurality of discrete resistive elements forming this layer.

[0091] According to one aspect of the invention, these discrete resistive elements form repetitive patterns.

[0092] According to one aspect of the invention, the heating and lighting device comprises a decoration visible from inside the passenger compartment, this decoration being for example a covering of the passenger compartment, such as for example a fabric, a leather or an aesthetic covering.

[0093] According to one aspect of the invention, the heating structure, the luminous structure and the decoration form stacked layers.

[0094] The device according to the invention thus makes it possible to carry out, in addition to the heating and lighting functions, a decorative function, for example with a predetermined leather or fabric zone, visible from the passenger compartment.

[0095] According to one aspect of the invention, the heating and lighting device comprises a mask made of a material which blocks the light coming from the luminous structure and comprising openings to allow this light to pass through according to a pattern provided by these openings.

[0096] The invention also relates to a vehicle interior component, comprising a heating and lighting device as mentioned above.

[0097] According to one aspect of the invention, the component is chosen from one of the following habitable components: - a component designed to be integrated into a vehicle door, - a component designed to be integrated into a dashboard, - a component for dressing a foot cellar, - a component of a roof or passenger compartment roof trim, - an armrest trim component, - a component of a glove box, - a pillar cladding component.

[0098] According to one aspect of the invention, the passenger compartment component which comprises the heating and lighting device is independent of a seat of the vehicle.

[0099] According to one aspect of the invention, the passenger compartment component which comprises the heating and lighting device 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 movement within the passenger compartment.

[0100] In particular, the heating and lighting device is not crossed by any air flow intended to cool or heat the passenger compartment. Preferably, the heating and lighting device is separate from an air movement system such as a Vehicle HVAC.

[0101] The invention also relates to a method for producing a heating and lighting device as mentioned above, comprising the following steps: - provide a light structure capable of emitting visible light, - provide a heating structure comprising: • at least one resistive layer arranged to produce heat when an electric current flows through this layer, this resistive layer being made of a material capable of allowing light emitted by the luminous structure to pass through, • at least two distribution electrodes, said distribution 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, - assemble these two structures together.

[0102] Other characteristics, details and advantages of the invention will emerge on reading the description given below for information purposes in relation to drawings in which:

[0103] - [Fig. 1][Fig. 1] is a schematic representation of a vehicle interior in car equipped with a heating and lighting device according to an exemplary embodiment of the invention,

[0104] - [Fig.2][Fig.2] is a schematic representation, in section, of the device of heating and lighting according to an exemplary embodiment of the invention;

[0105] - [Fig.3][Fig.3] is a schematic representation of a heating structure of the heating and lighting device of [Fig.2];

[0106] - [Fig.4][Fig.4] is a schematic representation of a heating structure according to another exemplary embodiment of the invention;

[0107] - [Fig.5][Fig.5] is a schematic representation of a light structure of the heating and lighting device of [Fig.2];

[0108] - [Fig.6][Fig.6] is a schematic representation of a light structure according to another exemplary embodiment of the invention;

[0109] - [Fig.7][Fig.7] is a schematic representation of the light structure of the [Fig.6], on the other side;

[0110] - [Fig.8][Fig.8] is a detailed view of the textile sheet of the light structure of [Fig.6];

[0111] - [Fig.9][Fig.9] is a schematic representation, in section, of a system of interactive comfort according to an exemplary embodiment of the invention;

[0112] - [Fig. 10] [Fig. 10] schematically illustrates a capacitive sensor equipping the interactive comfort system of [Fig.9];

[0113] - [Fig. 11] [Fig. 11] is an electrical diagram of the interactive comfort system of the [Fig.9] ;

[0114] - [Fig. 12] [Fig. 12] illustrates the control signals used in the diagram electric of [Fig. 11];

[0115] - [Fig. 13][Fig. 13] is an electrical diagram of an interactive comfort system according to another exemplary embodiment of the invention;

[0116] - [Fig. 14] [Fig. 14] illustrates a structure for visualizing a parasitic capacitance.

[0117] [Fig.l] shows a passenger compartment 100 of a motor vehicle V. We have also shown are doors 101 and the roof 102 of the passenger compartment. Seats 103 for passengers are also visible.

[0118] In the example described, heating and lighting devices 1 are integrated into the roof 102 of the passenger compartment.

[0119] As illustrated in [Fig.2], each heating and lighting device 1 is fixed to a roof structure 105 and comprises, in a stack, successively: - a light structure 10 capable of emitting visible light, placed against the roof structure 105, - a heating structure 50, - a rigid substrate 80, which is, in the example described, a structural part made of translucent plastic material, or of transparent plastic material, - a layer of flexible material 90, here a layer of foam, arranged to give the heating and lighting device 1 a feeling of softness to the touch, this layer 90 being able to be omitted if necessary, - a mask 100 made of a material which blocks the light coming from the light structure 10 and comprising openings to let this light pass according to a pattern provided by these openings, this mask 100 being able to be omitted if necessary, - a 110 decor which can be textile, leather, wood or plastic.

[0120] Each heating and lighting device 1 has a panel shape, with a functional face 2 towards which heat H produced by the heating structure 50 and light L produced by the light structure 10 can be sent, this functional face 2 being configured to diffuse the heat H and light L thus received towards the passenger compartment 100.

[0121] The functional face 2 is thus an external face of the heating and lighting device 1 on which the heating and lighting functions are manifested, to heat an area of ​​the passenger compartment 100 and / or to illuminate an area of ​​this passenger compartment 100 or to create a light effect visible from the passenger compartment 100.

[0122] The heating and lighting device 1 may be flexible, i.e. it may be shaped to take a predetermined shape.

[0123] The heating structure 50 and the light structure 10 are assembled by lamination.

[0124] As described with reference to [Fig.5], the light structure 10 comprises light sources 11, here under a row of LEDs (light-emitting diodes). Only two LEDs 11 are shown in [Fig.5].

[0125] The visible light emitted by the light structure 10 is light visible to the human eye.

[0126] In the example of [Fig.5], the light structure 10 comprises a light engine 12 which is an electronic device with a printed circuit 13, comprising the LEDs 11 and a light guide 14 for guiding the light emitted by the LED(s).

[0127] The light guide 14 comprises a plate 15 in which light can propagate, this plate comprising a light emission face 16.

[0128] The plate 15 has a complex curved shape with a main face 19 approaching a flat surface.

[0129] This plate 15 comprises facets 17 for injecting the light from the LEDs 11, these facets 17 being at the end of narrowed, bent regions 18 of the plate 15.

[0130] The plate 15 is made of plastic-based material, with a predetermined shape, namely that it does not deform or does not deform substantially when it is integrated into the heating and lighting device 1.

[0131] The plate 15 has two faces separated by the thickness of the plate, one of these faces having optical activation reliefs 20 arranged to cause the deflection of the light towards the light emission face 16 which is opposite the face on which the reliefs 20 are made.

[0132] Thus, the plate 15 forms a surface light source.

[0133] The emission face 16 is opposite the heating structure 50.

[0134] With reference to Figures 6 and 7, a light structure 30 has been illustrated, which can, in another example of implementation of the invention, be used instead of the light structure 10 previously described, in the heating and lighting device 1.

[0135] In this example, the light structure 30 comprises a woven sheet 31.

[0136] [Fig.6] represents the face 32 of the luminous structure 30 which is opposite the heating structure 50.

[0137] [Fig.7] represents the face 33 of the luminous structure 30 which is opposite the face 32.

[0138] The textile sheet 31 comprises interlaced textile threads 35 and optical fibers 36, as illustrated in [Fig.8].

[0139] The textile threads 35 comprise threads in a natural material such as vegetable threads, and / or threads in an artificial or synthetic material.

[0140] The optical fibers 36, called warp threads, are woven with textile threads 35, in weft.

[0141] In another exemplary embodiment of the invention, not illustrated, the textile sheet may comprise optical fibers 36 in weft woven with textile threads 35, in warp.

[0142] The textile sheet 31 may comprise textile threads 35, arranged in warp and weft according to a canvas-type reinforcement.

[0143] The optical fibers 36 are then punctually linked to the textile threads of the frame 35 by means of textile threads, the optical fibers 36 being substantially positioned on a surface parallel to the surface defined by the frame 35.

[0144] The frame 35 is flexible, that is to say capable of taking a predetermined shape by deformation.

[0145] The textile sheet 31 has a thickness of between 0.1 mm and 0.7 mm.

[0146] The optical fibers 36 may each be formed by a core sheathed in a fluoropolymer. The core of the optical fibers may be formed from a material chosen from polymethyl methacrylate (PMMA) and polycarbonate (PC). Alternatively, the optical fibers may each be formed by a glass fiber yarn.

[0147] The textile yarns 35 may be formed from a material chosen from wool, aramid, polyamide, polyester and cotton.

[0148] Due to the weaving pattern, the optical fibers 36 extend mainly on the face 32 of the sheet 31, without being unduly masked by the textile threads 35 which cover more of the opposite face 33.

[0149] The optical fibers 36 are arranged to emit light laterally towards the outside of the fiber.

[0150] One or more LEDs 11 supply the optical fibers 36 which are arranged in a convergent manner towards this or these LEDs 11.

[0151] We will now describe, in more detail, the heating structure 50.

[0152] As illustrated in [Fig.3], this heating structure 50 comprises a resistive layer 51 arranged to produce heat when this layer is traversed by an electric current I, this resistive layer being made of a material capable of allowing light emitted by the luminous structure 10 or 30 to pass through.

[0153] The heating structure 50 further comprises two distribution electrodes 52, which are in electrical contact with the resistive layer 51 so as to allow an electric current I to flow through the resistive layer 51 between these two electrodes 52.

[0154] These electrodes 52 have parallel sections 53 between which the resistive layer 51 is located, and transverse sections 54 which are connected to electrical supply wires 55.

[0155] The material of the resistive layer 51 contains a transparent conductive oxide (TCO) chosen from indium-tin oxide (ITO) and zinc oxide (ZnO).

[0156] Thus the resistive layer 51 is both transparent to the light from the luminous structure 10 or 30, and allows heat to be generated by the Joule effect.

[0157] In the example described, the entire heating structure 50 is placed between the functional face 2 and the luminous structure 10 so that light from this luminous structure 10 passes through the resistive layer 51 of the heating structure before reaching the functional face 2.

[0158] 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.

[0159] The electrodes 52 are deposited on the substrate 58 by printing, screen printing or lamination of several materials.

[0160] The electrodes 52 are made of conductive material, in particular metallic material such as ink charged with conductive particles, in particular silver or copper particles.

[0161] Furthermore, the resistive layer 51 is deposited on the substrate by printing, screen printing or lamination of several materials.

[0162] The resistive layer 51 is present on one face of the substrate 58, opposite the functional face of the device 1.

[0163] The substrate 58 is of the textile type, woven or knitted, or of the non-woven type.

[0164] The nonwoven may comprise a mixture of polypropylene fibers and / or polyester fibers. Other fibers may be used, for example natural fibers.

[0165] Alternatively, the substrate 58 may be a flexible plastic sheet or a foam such as TPU (thermoplastic polyurethane).

[0166] The substrate 58 has a thickness of less than 1 cm, and an area of ​​at least 10 cm2, or at least 50 cm2, or at least 500 cm2.

[0167] In another example illustrated in [Fig.4], the heating structure 50 can be replaced, in the heating and lighting device 1, by a heating structure 70 which comprises an array of electrodes 71 as described below.

[0168] This network of electrodes 71 comprises two rectilinear distribution electrodes 72 and a plurality of contact electrodes 73 supplied with electric current by the distribution electrodes 72.

[0169] The distribution electrodes 72 can be seen as “parent” electrodes and the contact electrodes 73 as “child” electrodes.

[0170] Several contact electrodes 73 are connected to the same distribution electrode 72, along a right angle.

[0171] The contact electrodes 73 are parallel to each other, and form pairs each associated with a resistive layer 75.

[0172] These layers 75 are separated from each other and form several heating zones, for example with repetitive patterns.

[0173] In another example not illustrated, the distribution electrodes 72 may have different shapes, in particular curved with rounded edges.

[0174] The heating and lighting device 1 comprises the decoration 105 which is visible from the interior of the passenger compartment 100, this decoration 105 being a covering of the passenger compartment, such as for example a fabric, a leather or an aesthetic covering.

[0175] The heating structure 50 or 70, the light structure 10 or 30 and the decoration 105 form stacked layers.

[0176] The device 1 thus makes it possible to carry out, in addition to the heating and lighting functions, a decorative function, for example with a predetermined leather or fabric zone, visible from the passenger compartment.

[0177] Generally, the device 1 can be used to form a component 120 chosen from one of the following habitable components: - a component designed to be integrated into a vehicle door, - a component designed to be integrated into a dashboard, - a component for dressing a foot cellar, - a component of a roof or passenger compartment roof trim, - an armrest trim component, - a component of a glove box, - a pillar cladding component.

[0178] [Fig.l] shows the use case in a vehicle roof.

[0179] The passenger compartment component 120 which comprises the heating and lighting device is independent of a seat 103 of the vehicle.

[0180] The passenger compartment component 120 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 movement within the passenger compartment.

[0181] Another exemplary embodiment of the invention will now be described with reference to Figures 9 and 10.

[0182] In this example, the interactive comfort system 400 comprises: - a heating structure 401 comprising: • a resistive layer 402 in the form of a carbon-based ink sheet, similar to the resistive layer 51 previously described, • electrodes (not shown in Figure 9) in electrical contact with the resistive layer 402 so as to allow an electric current to flow through the resistive layer 402 between these two electrodes.

[0183] The interactive comfort system 400 further comprises a capacitive sensor 403 arranged to detect, in a detection zone 404, a presence of a part of a passenger, for example an arm, an elbow, a hand or a finger of the passenger.

[0184] The capacitive sensor 403 is arranged to detect without contact a part of a passenger, for example an arm, an elbow, a hand or a finger FG of the passenger. Alternatively, this detection can be carried out with contact.

[0185] As can be seen in [Fig. 10], the capacitive sensor 403 comprises, on a flexible support 406, several electrical armatures 405 forming capacitive electrodes 405 distributed on this flexible support 406 made for example of transparent or translucent plastic material, for example in the form of a film. The electrical armatures 405 can be made of PEDOT, silver mesh or even ITO.

[0186] Certain capacitive electrodes 405, of substantially square shape, form capacitive control buttons 408 associated for example with different setpoint temperature settings for controlling the heating of the heating structure 50.

[0187] Other capacitive electrodes 405 form a sliding control bar 409, namely these capacitive electrodes 405 are aligned, side by side with a small space between them, in a rectilinear row. This sliding control bar 409, also called "Slider" in English, can be controlled by passing a finger FG nearby, without contact, or in physical contact. The sliding movement of the finger along this sliding control bar 409 makes it possible to control the desired type of adjustment, depending on the capacitive electrode 405 above which the sliding movement of the finger FG stops.

[0188] There are thus, on the flexible support 406, buttons 408 and sliding control bars 409, to allow the passenger to control different functions.

[0189] Each capacitive electrode 405 is arranged to measure the capacitance that appears between two surfaces. The value of this capacitance increases as the distance between the two surfaces decreases. Each capacitive electrode 405 acts as a first conductive surface and a part of the human body, at a capacitive coupling distance with the capacitive electrode 405, acts as a second conductive surface. Changes in distance between the two conductive surfaces modify the capacitance which is detectable by a control unit 410.

[0190] The capacitive sensor 403 is arranged here to acquire a setting temperature entered by a passenger, and the control unit 410 is arranged to deliver a set temperature value as a function of this setting temperature entered by the passenger.

[0191] The capacitive sensor 403 is in the form of a flexible component which is interposed between the resistive layer 402 and an external layer 411, which serves as protection and / or decoration, in particular made of PMMA, or polymethyl methacrylate. Of course, any other electrically insulating protection and / or decoration material can be used.

[0192] Adhesive layers 412 are provided to ensure the cohesion of the stack 414. These adhesive layers 412 are for example each a double-sided adhesive sheet.

[0193] The stack 414 also comprises a foam layer 415.

[0194] The stack 414 thus successively comprises: - the 415 foam layer, - one of the layers of adhesive 412, - the resistive layer 402, - one of the layers of adhesive 412, - the capacitive sensor 403, - one of the layers of adhesive 412, - the outer layer 411 in PMMA.

[0195] The capacitive electrodes 405 are obtained by screen printing or printing on the flexible support 406.

[0196] We will now describe with reference to [Fig. 11] an electrical diagram of the interactive comfort system 400, diagram on which we see the heating structure 401 symbolized by an associated resistor and one of the capacitive electrodes 405, these elements being connected to the control unit 410.

[0197] To protect the operation of the capacitive electrode 405 from electrical disturbances, the control unit 410 is arranged to generate an electrical control signal for the heating structure 401, this electrical control signal being selectively of a first type SP1 configured to operate the heating structure 401 in heating mode for a duration T1 (see [Fig. 12]) and of a second type SP2 configured to operate the heating structure 401 in electrical protection mode, for a duration T2 (see [Fig. 12]), in which the intensity of an electric field between the resistive layer 402 of the heating structure 401 and the electrical armature 405 of the capacitive sensor 403 is actively reduced using the control signal SP2, as explained below.

[0198] The phases T1, for example of 10 milliseconds (ms), and T2, for example of 2 ms, follow one another, with modulations SP1 and SP2 which are a function of the heating and capacitive detection requirements.

[0199] [Fig. 12] represents, as a function of time TM, at the top, the electrical control signal SP1 for heating the resistive layer 402 alternating with the signal of electrical control SP2 of electrical protection and, at the bottom, steps 417 of acquisition of the capacitive signal of the capacitive sensor 403 to detect the approach for example of a finger FG.

[0200] As illustrated in [Fig. 14], in the absence of such an electrical protection mode, a strong electric field may appear between the resistive layer 402 of the heating structure 401 and the electrical armature 405 of the capacitive sensor 403, which is accompanied by a strong parasitic capacitance Cp which prevents the capacitance Cx from being measured between the electrical armature 405 of the capacitive sensor and the part of the human body, for example the finger FG. Indeed, the value Cp may be very large (in particular due to its carbon nature and its relatively large dimensions) compared to the value Cx so that small variations in the value Cx are difficult to detect. The value Cx, due to the presence of the external layer 411 in PMMA which prevents the finger FG from coming into contact with the electrode 405, is limited.

[0201] Further explanations of this phenomenon are given below.

[0202] The electrical armature 405 of the capacitive sensor 403 is at an electrical potential, for example 3 Volts, necessary for its operation. The finger FG and the resistive layer 402 of the heating structure 401 are assimilated to the ground plane, at 0 Volts. Due to the potential difference between the electrode 405 and the user's finger FG, an electric field is established. The capacitive sensor 403 detects the variations in intensity of this field due to the approach of the finger FG, through the electrical capacitance Cx established between the finger FG and the electrode 405. If the invention is not implemented, it is observed that between the electrode 405 and the resistive layer 402 there is a potential difference and a parasitic electric field and electrical capacitance Cp are created. The capacitance Cp adds to the capacitance Cx, which disrupts the operation of the capacitive sensor 403.The manifestation is generally a strong decrease in the sensitivity of the capacitive sensor 403, which can cause it to deactivate. A critical case can occur when the electrical potential of the resistive layer 402 is not constant. This situation occurs when the resistive layer 402 is switched on. To modulate the heating power, the resistive layer 402 is supplied with a PWM voltage. These potential variations create a disturbance of the capacitive sensor 403 which is more difficult to filter. The capacitance Cp is all the greater as the surface area of ​​the resistive layer 402 is large. For comparison, an electrode 405 can have dimensions of the order of 10 mm x 10 mm, while the resistive layer 402 can measure, for example, 100 mm x 500 mm.

[0203] The field between the finger FG and the electrode 405 is a desired effect while that between the electrode 405 and the resistive layer 402 is a parasitic factor.

[0204] Thanks to the invention, in the protection mode, the intensity of the electric field between the resistive layer 402 of the heating structure 401 and the electrical armature 405 of the capacitive sensor 403 is reduced, which results in having a low or very low effect of the parasitic capacitance on the side of the resistive layer 402 of the heating structure. The synchronization of the control signals on the heating structure 401 and the capacitive sensor 403 makes it possible to avoid parasitic currents between them and therefore to avoid disturbances in Cx measurements. In the invention, the resistive layer 402 itself plays a protective role during the duration T2, without having to resort to a separate device dedicated to this protection.

[0205] In the example of the invention, in heating mode of the heating structure 401 (for example over the duration T1 of [Fig. 12]), the control signal SP1 is a PMW signal whose duty cycle is adjustable according to the required heating power. The control signals allow voltage control.

[0206] In electrical protection mode, the control signal SP2 of the heating structure 401 is identical to the control signal of the capacitive sensor 403, as can be seen in [Fig. 12].

[0207] This synchronization makes it possible to reduce the intensity of the electric field between the resistive layer 402 of the heating structure and the electrical armature 405 of the capacitive sensor.

[0208] The control signal of the resistive layer 402 is a copy of the signal applied to the capacitive electrode 405 of the capacitive sensor.

[0209] As visible in [Fig. 11], to enable the protection mode described above, the system 400 comprises a follower amplifier 420, of gain 1, with high input impedance, configured to produce a copy of the signal SP2 coming from a control circuit 421 of the capacitive sensor 403, this copied signal being applied to the heating structure 401.

[0210] An electrical power control module 422 associated with the heating structure 401 is configured to control, in heating mode, two switches 424 on the basis of a PWM control signal.

[0211] The switches 424 are at the two terminals of the heating structure 401.

[0212] In protection mode, these two switches 424 are open and it is the copied signal which controls the heating structure 401.

[0213] In heating mode, the follower amplifier 420 is disabled (high impedance output), and one of the two switches 424 is held closed and the other of these switches 424 is operated by the heating PWM signal.

[0214] According to another embodiment of the invention illustrated in [Fig.13], the system comprises a switch 425 formed by a transistor, associated with the capacitive sensor 403, and two switches 426 and 427 respectively at the input of the heating structure 401 and at its output.

[0215] In this example, in heating mode, switch 425 is open, and one of the two switches 426 and 427 is kept closed and the other of these switches 426 and 427 is operated by the heating PWM signal.

[0216] In protection mode, switch 425 and switch 426 are controlled alternately, synchronously with capacitive sensor 403, while switch 427 is open.

Claims

1.

2.

3. Claims Interactive comfort system (400), in particular intended to be installed inside a passenger compartment of a vehicle, in particular a motor vehicle, the system comprising: - a heating structure (401) comprising: • at least one resistive layer (402) arranged to produce heat when this layer is traversed by an electric current, this resistive layer being in particular a carbon-based sheet deposited on a substrate, • at least two electrodes in electrical contact with the resistive layer (402) so as to allow an electric current to flow through the resistive layer between these two electrodes, - a capacitive sensor (403) arranged to detect, in a detection zone (404), a presence of a part of a passenger, for example an arm, an elbow, a hand or a finger (FG) of the passenger, the capacitive sensor comprising at least one electrical armature forming a capacitive electrode (405), system in which the electrical armature (405) and the heating structure (401) form a stack (414) in which the electrical armature is arranged between the resistive layer and the detection zone, the system (400) being arranged to generate an electrical control signal (SP1; SP2) for heating the resistive layer of the heating structure, this electrical control signal being configured to operate the heating structure alternately in heating mode and in electrical protection mode in which the intensity of an electric field between the resistive layer (402) of the heating structure and the electrical armature (405) of the capacitive sensor is actively reduced using the control signal. System according to the preceding claim, in which the electrical armature (405) of the capacitive sensor is formed on a support (406), in particular which is flexible. System according to one of the preceding claims, in which, in heating mode of the heating structure (401), the control signal (SP1) is a PWM signal whose duty cycle can be adjusted according to the required heating power.

4. System according to one of the preceding claims, in which, in electrical protection mode, the control signal (SP2) of the heating structure (401) is a copy of the control signal of the capacitive sensor (403).

5. System according to the preceding claim, in which the system comprises a follower amplifier (420) configured to produce a copy of the signal from the capacitive sensor, this copied signal being applied to the heating structure.

6. System according to one of the preceding claims, in which an electrical power control module (422) associated with the heating structure is configured to control, in heating mode, two switches (424) on the basis of a PWM control signal.

7. System according to the preceding claim, in which, in protection mode, at least one of these two switches (424) are open.

8. System according to one of the preceding claims, in which the capacitive sensor (403) is arranged to acquire a setting temperature entered by a passenger, and a control unit is arranged to deliver a set temperature value as a function of this setting temperature entered by the passenger.

9. System according to one of the preceding claims, in which capacitive electrodes (405) form a sliding control bar.

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