Vehicle control system

Abstract

Vehicle control system The present invention relates to a control system (10) for a function of a vehicle comprising a touch screen (12) and a rotary knob (14). The rotary knob (14) comprises a translucent outer ring (20) rotatably mounted relative to an inner ring (18). The control system (10) also comprises a dynamic backlighting system (16) for the outer ring (20) configured so that, during rotation by a user, the outer ring (20) has an illuminated region (30) moving relative to the inner ring (18) following the rotation of the outer ring (20). The dynamic backlighting system (16) comprises a light source attached to the inner ring (18), each light source being adapted to pass from an illuminated configuration, in which a photonic component emits light, to an off configuration, in which the photonic component does not emit any light.Figure for abstract: Figure 1.

Description

Title of the invention: Vehicle control system

[0001] The present invention relates to a system for controlling at least one function of a vehicle, in particular a motor vehicle.

[0002] Such a control system is intended to allow the user to interact with a display device, such as a touch screen, to display information useful to the driver and / or passengers such as navigation information, pictograms, and / or to control certain functions of the vehicle.

[0003] Such a known control system further comprises a rotary knob fixed on a touch screen making it possible to control the selection of a parameter from a plurality of parameters, such as for example a radio channel, and / or to control the intensity of a parameter, such as for example the sound volume in the passenger compartment or the ventilation, by capacitive or optical detection.

[0004] In order to provide an intuitive and attractive interface for the user, it is known to use the light produced by the touch screen to backlight the rotary button.

[0005] However, such a system does not give complete satisfaction.

[0006] Indeed, such a system is complex to implement, particularly from the point of view of the interaction between the touch screen and the rotary button. The rotational movements of the rotary button are in fact difficult to determine precisely to provide quality backlighting.

[0007] In addition, the backlighting of the rotary knob is made more complex because the space available inside the latter is small and no wired connection is possible between the touch screen and the inside of the rotary knob.

[0008] An aim of the invention is to provide a control system comprising a rotary button fixed to a touch screen, the use of which by the user is made intuitive in a simpler and more reliable manner.

[0009] For this purpose, the invention relates to a system for controlling at least one function of a vehicle, the control system comprising a touch screen and a rotary knob, the rotary knob comprising an inner ring fixed to the touch screen and an outer ring rotatably mounted relative to the inner ring, the outer ring comprising a base body and a conductive index, the base body of the outer ring being translucent and capable of diffusing light, the conductive index being integral with the base body and in contact with the touch screen; the control system also comprising a dynamic backlighting system for the outer ring configured so that, during rotation by a user of the outer ring relative to the inner ring, the translucent base body of the outer ring has a lit region moving relative to the inner ring in following the rotation of the outer ring relative to the inner ring, the dynamic backlighting system comprising at least one light source fixed to the inner ring, each light source comprising at least one photonic component and a receiver, the receiver being able to receive an electric field external to the rotary button and to power said at least one photonic component, each light source being able to pass from an on configuration, in which said at least one photonic component emits light while being powered by the receiver, to an off configuration, in which said at least one photonic component does not emit any light.

[0010] According to different embodiments, the control system comprises one or more of the following characteristics, taken in isolation or in all technically possible combinations:

[0011] - the dynamic backlighting system comprises a processing unit and a transmitter, preferably integrated into the touch screen, the transmitter being capable of emitting an electric field external to the rotary button, preferably an alternating electric field, the processing unit being capable of controlling the transmitter;

[0012] - the transmitter and receiver are also configured to exchange data for vary between off and on configuration;

[0013] - the dynamic backlighting system further comprises a system power supply of the transmitter, preferably integrated into the touch screen;

[0014] - the processing unit of the dynamic backlighting system is configured to control the transition, for said at least one light source, from the off configuration to the on configuration, when a user touches the rotary button;

[0015] - the dynamic backlighting system comprises a plurality of light sources miners fixed to the inner ring and in which the inner ring comprises a base body delimiting, for each light source, a window arranged such that the light from the light source is diffused radially towards the outside of the rotary button, each photonic component preferably being arranged opposite the window;

[0016] - the processing unit of the dynamic backlighting system is configured to controlling the switching of the one or all light sources from the off configuration to the on configuration, when a user touches the rotary knob, the backlighting system further comprising a blackout ring, the blackout ring being attached to the outer ring and having an opaque annular base body and a light-transmitting area, said lit region of the translucent base body of the outer ring corresponding to the region of the translucent base body opposite said light-transmitting area;

[0017] - the occulting ring is arranged so that the light-transmitting area leaves pass the light from only one of the windows in the inner ring;

[0018] - the processing unit is configured to:

[0019] - acquiring the spatial coordinates of the driver's index finger on the touch screen;

[0020] - controlling the transmitter to pass said at least one light source from one of the configurations to the other as a function of the acquired spatial coordinates of the conductive index, said lit region of the translucent base body of the outer ring corresponding to the region of the translucent base body opposite the or each light source in the lit configuration.

[0021] - the dynamic backlighting system comprises a plurality of light sources miners and in which the processing unit is also configured to:

[0022] - determine from the acquired spatial coordinates, an angular sector ignition and an angular extinction sector and,

[0023] - control the transmitter so that each light source arranged in the sector angular switching-on sector either in the switched-on configuration and for each light source arranged in the angular switching-off sector or in the switched-off configuration, said switched-on region of the translucent base body of the outer ring corresponding to the region of the translucent base body opposite the angular switching-on sector.

[0024] The invention will appear more clearly on reading the description which follows, given solely by way of non-limiting example, and made with reference to the drawings in which:

[0025] [Fig-1] [Fig.l] is a perspective view of a rotary knob of the system of control according to the invention having an illuminated region,

[0026] [Fig.2] [Fig.2] is a functional diagram of a control system according to the invention,

[0027] [Fig.3] [Fig.3] is a schematic sectional view of a rotary knob of the figure according to one embodiment.

[0028] Figures 1 and 2 illustrate a control system 10 according to a first embodiment of at least one function of a vehicle according to a first embodiment.

[0029] The vehicle (not shown) is for example a motor vehicle.

[0030] The control system 10 comprises a touch screen 12, a rotary knob 14 and a 16 dynamic backlight system.

[0031] The control system 10 comprises, for example, a vehicle trim element, such as a dashboard covering, a control panel, a central console arranged between two front seats of the vehicle, or the like.

[0032] The touch screen 12 is configured to display graphical information useful to the driver and / or passengers such as navigation information, pic- tograms, and / or to control certain vehicle functions.

[0033] The touch screen 12 is preferably integrated into the trim element of the vehicle.

[0034] The touch screen 12 has a user surface.

[0035] The user surface is accessible by a user's touch.

[0036] The user surface is for example flat.

[0037] The rotary knob 14 comprises an inner ring 18 attached to the touch screen 12 and an outer ring 20.

[0038] The outer ring 20 is rotatably mounted relative to the inner ring 18.

[0039] To do this, the rotary button 14 comprises, for example, a ball bearing system, or any other bearing system, capable of ensuring the rotation of the outer ring 20 relative to the inner ring 18.

[0040] In the illustrated example, the inner ring 18 and the outer ring 20 are coaxial along a central axis. The outer ring 20 is then movable in rotation relative to the inner ring 18 along the central axis.

[0041] The central axis is perpendicular to the touch screen 12, in particular perpendicular to the user surface of the touch screen 12.

[0042] The central axis is fixed relative to the touch screen 12 during any rotation of the outer ring along the central axis.

[0043] The inner ring 18 comprises a base body 22.

[0044] The base body 22 preferably has a circular ring shape.

[0045] The base body 22 has a thickness, taken along the central axis from the 12 touchscreen user area, greater than 1.0 mm.

[0046] In particular, the central axis is an axis of revolution of the base body 22.

[0047] Preferably, the base body 22 delimits a plurality of windows 24.

[0048] The windows 24 are for example formed by openings in the base body 22.

[0049] The windows 24 are preferably distributed regularly along the circumference of the inner ring 18.

[0050] The windows 24 are all preferably arranged radially equidistant from the central axis.

[0051] The windows 24 are preferably of the same length, taken orthoradially to the central axis.

[0052] Hereinafter, any reference to the terms "radial" and "orthoradial" must be understood with respect to the central axis.

[0053] The windows are preferably in a number greater than or equal to 2 and for example less than or equal to 50, advantageously less than or equal to 10.

[0054] The base body 22 is opaque.

[0055] By “opaque” we mean that the base body 22 is capable of allowing up to 1% of visible light transmission.

[0056] The base body 22 is for example made of acrylonitrile butadiene styrene (ABS).

[0057] The base body 22 is fixed to the touch screen 12, for example by gluing.

[0058] The base body 22 is for example made of electrically insulating material.

[0059] Preferably, the base body 22 defines a through opening 21. Thus, the through opening 21 reveals the user surface. This makes it possible to display information on the touch screen 12 at the through opening 21 which is visible to the user.

[0060] The outer ring 20 comprises a base body 26 and a conductive index 28.

[0061] The base body 26 of the outer ring 20 is translucent.

[0062] By “translucent” we mean that the base body 26 is capable of allowing more than 5% transmission of visible light.

[0063] The base body 26 is capable of diffusing light.

[0064] By "capable of diffusing light" is meant that the base body 26 has a textured surface and a certain quantity of additives in order to disperse the light and thus provide diffusive properties.

[0065] The base body 26 preferably has a circular ring shape.

[0066] The base body 26 of the outer ring 20 is attached against the circumference of the base body 22 of the inner ring.

[0067] In other words, the base body 26 of the outer ring 20 extends radially outside the base body 22 of the inner ring 18.

[0068] In particular, at least one plane parallel to the user surface of the touch screen 12 intersects both the base body 22 of the inner ring 18 and the base body 26 of the outer ring 20.

[0069] The base body 26 has an outer diameter greater than the outer diameter presented by the base body 22 of the inner ring 18.

[0070] The base body 26 of the outer ring 20 has, for example, a thickness, taken along the central axis from the user surface of the touch screen 12, less than the thickness of the base body 22 of the inner ring 18.

[0071] The base body 26 radially surrounds the inner ring 18, in particular the plurality of windows 24.

[0072] The base body 26 is for example made of polymethyl methacrylate (PMMA).

[0073] The conductive index 28 is integral with the base body 26.

[0074] The conductive index 28 is arranged under the base body 26 and is in direct contact with the touch screen 12 or in contact with the base body 22.

[0075] The conductive index 28 is made of an electrically conductive material, such as metal.

[0076] The dynamic backlighting system 16 according to the invention is a dynamic backlighting system for the outer ring 20 of the rotary button 14.

[0077] According to the invention, the dynamic backlighting system 16 is configured so that, during rotation by a user of the outer ring 20 relative to the inner ring 18, the translucent base body 26 of the outer ring 20 has a lit region 30 moving relative to the inner ring 18 following the rotation of the outer ring 20 relative to the inner ring 18.

[0078] The illuminated region 30, shown in [Fig. 1], is visible to the user from outside the rotary knob 14.

[0079] The dynamic backlighting system 16 comprises a plurality of light sources 34.

[0080] Preferably, the dynamic backlighting system 16 also comprises a processing unit 36 ​​and a transmitter 38.

[0081] The dynamic backlighting system 16 comprises for example a power supply system 40.

[0082] The dynamic backlighting system 16 also comprises, for example, a user contact sensor (not shown).

[0083] The user contact sensor is configured to detect contact of the rotary knob 14 by the user.

[0084] The user contact sensor is preferably capacitive.

[0085] The user contact sensor is then configured to detect a change in capacity when a user touches rotary knob 14.

[0086] The light sources 34 are fixed to the inner ring 18, such that the light from each light source 34 is diffused radially towards the outside of the rotary knob through one of the windows 24.

[0087] Preferably, the number of light sources 34 is identical to the number of windows 24 of the inner ring 18.

[0088] Each light source 34 comprises at least one photonic component 42 and a receiver 44.

[0089] The receiver 44 is capable of receiving an electric field external to the rotary button 14 and of supplying the photonic component 42 with electricity.

[0090] Each photonic component 42 is configured to emit light radially, relative to the central axis.

[0091] Each light source 34 is capable of switching from an on configuration, in which the photonic component 42 emits light while being powered by the receiver 44, to an off configuration, in which the photonic component 42 emits no light, and vice versa.

[0092] Each photonic component 42 is arranged above the user surface of the 12 touch screen.

[0093] Each photonic component 42 is arranged opposite one of the windows 24 through which the emitted light is diffused.

[0094] Each photonic component 42 is arranged radially closer to the central axis than the windows 24.

[0095] Each photonic component 42 is powered only by the associated receiver 44.

[0096] None of the photonic components 42 have a wired connection to the exterior of the rotary knob 14.

[0097] In particular, no power source is incorporated into the rotary knob 14.

[0098] The photonic components 42 are for example lamps, bulbs and preferably LEDs (from the English Light Emitting Diodes).

[0099] The power supply system 40 is configured to provide the electrical power necessary for the transmitter 38 to operate.

[0100] The power supply system 40 is integrated with the touch screen 12 and configured to also power all of the systems of the touch screen 12.

[0101] The electrical power supply system 40 draws its electrical power in particular from the vehicle's battery.

[0102] The transmitter 38 is capable of emitting an external electric field to the rotary button 14, preferably an alternating electric field, and of exchanging data with the receiver 44 of each light source 34.

[0103] The data includes for example information representative of the current configuration of the light source 34 associated with each receiver 44.

[0104] The transmitter 38 is preferably integrated into the touch screen 12.

[0105] The processing unit 36 ​​comprises, for example, a computer processing device operatively connected to a computer memory, for example, a digital signal processor (DSP), a microcontroller, a field programmable grid array (FPGA) and / or a dedicated integrated circuit (ASIC) capable of performing various data processing operations and functions.

[0106] The computer processing device comprises, for example, a single processor. Alternatively, the computer processing device comprises several processors, which are located in the same geographical area, or are, at least partially, located in different geographical areas and are then able to communicate with each other.

[0107] By the term "memory" is meant any volatile or non-volatile computer memory suitable for the subject matter currently disclosed, such as random access memory (RAM), read only memory (ROM) or other electronic, optical, magnetic or any other computer-readable storage medium on which the data and control functions as described herein are stored.

[0108] Therefore, memory is a tangible storage medium where data and control functions are stored in a non-transitory form.

[0109] The processing unit 36 ​​is connected to the touch screen 12, to the transmitter 38 and to the user contact sensor.

[0110] The processing unit 36 ​​is integrated into the touch screen 12 and also ensures the operation of the touch screen 12. For this purpose, the processing unit 36 ​​comprises means for processing the graphic information, for example a graphics processor, an associated graphics memory for displaying information on the touch screen 12, and devices suitable for receiving and processing the tactile interactions of the touch screen 12.

[0111] The processing unit 36 ​​is capable of controlling the transmitter 38, to control the transition, for at least one of the light sources 34, from the off configuration to the on configuration, when a user touches the rotary button 14.

[0112] To do this, the user contact sensor is connected to the processing unit 36 ​​and is configured to transmit to it the information that a user is touching the rotary button 14.

[0113] The processing unit 36 ​​is also preferably capable of controlling the transmitter 38 to control the switching of all the light sources 34 to the off configuration, when the user no longer touches the rotary button 14.

[0114] The information concerning the conductive index 28 in contact with the touch screen 12 is received by the processing unit 36, in particular the processing unit 36 ​​is configured to acquire the spatial coordinates of the conductive index 28 on the touch screen 12.

[0115] The processing unit 36 ​​is thus configured to acquire the spatial coordinates of the conductive index 28 on the touch screen 12.

[0116] The spatial coordinates are two-dimensional along an x ​​axis and a y axis, these two axes defining a plane coincident with the user surface of the touch screen 12.

[0117] To do this, the processing unit stores reference spatial coordinates of the conductive index 28 defined for a reference position of the conductive index 28. The reference position is associated with a reference angular position of the outer ring 20 relative to the inner ring 18.

[0118] From the acquired spatial coordinates of the conductive index 28 and the reference spatial coordinates, the processing unit 36 ​​is configured to determine the current angular position of the outer ring 20 relative to the inner ring 18.

[0119] The processing unit 36 ​​is also configured to control, depending on the co spatial ordinates of the driver's index 28, a vehicle function and / or a display on the touch screen 12.

[0120] For example, the processing unit 36 ​​is configured to control the selection of a parameter from a plurality of parameters, such as for example a radio channel; and / or to control the intensity of a parameter, such as for example a sound volume in the passenger compartment, a temperature in the passenger compartment, or the ventilation.

[0121] Preferably, the processing unit 36 ​​is configured to determine a direction of rotation of the driver index 28 and to control the function of the vehicle as a function of the determined direction of rotation.

[0122] For example, a rotational movement in a first direction of rotation makes it possible to increase the intensity of the parameter and a rotational movement in a second opposite direction makes it possible to decrease the intensity of the parameter.

[0123] In a first embodiment, the processing unit 36 ​​is configured to determine, as a function of the current determined angular position, an angular switching-on sector and an angular switching-off sector of the light sources.

[0124] The angular sectors of ignition and extinction are centered on the central axis and are taken parallel to the user surface.

[0125] The angular sectors of ignition and extinction are for example defined such that the conductive index 28 is arranged under the lit region 30.

[0126] The extinction angular sector is preferably greater than the ignition angular sector.

[0127] The angular sectors of ignition and extinction are advantageously complementary to one another.

[0128] The sum of the angular sectors of ignition and extinction preferably corresponds to 360°.

[0129] The processing unit 36 ​​is then configured to control the transmitter 38 to switch the light sources 34 from one of the configurations to the other as a function of the acquired spatial coordinates of the conductive index 28.

[0130] More precisely, the processing unit 36 ​​is configured to control the transmitter 38 so that each light source 34 arranged in the angular switching-on sector is in the switched-on configuration and for each light source 34 arranged in the angular switching-off sector is in the switched-off configuration.

[0131] The processing unit 36 ​​is then configured to control the transmitter 38 to switch each light source 34 arranged in the angular switching-on sector which is previously in the off configuration to the on configuration and to switch each light source 34 arranged in the angular switching-off sector which is previously in the on configuration to the off configuration.

[0132] The lit region 30 of the translucent base body 26 of the outer ring 20 then corresponds to the region of the translucent base body 26 opposite the or each light source 34 in the lit configuration, that is to say opposite the angular lighting sector.

[0133] The receivers 44 of each light source 34 of the ignition angular sector receive an electric field external to the rotary button 14, allowing the photonic components 42 to emit light.

[0134] The receivers 44 of each light source 34 of the angular extinction sector do not receive an electric field external to the rotary button 14, the photonic components 42 therefore not emitting light.

[0135] When the rotary knob 14 is set in motion by a user, the spatial coordinates of the conductive index 28 vary by rotation of the outer ring 20 relative to the inner ring 18, and the angular sectors of switching on and off are modified accordingly. The processing unit 36 ​​then controls the transmitter 38 to change the configurations of the light sources 34 having changed angular sector simultaneously with the rotation.

[0136] A method for controlling at least one function of a vehicle, according to a first embodiment, will now be described.

[0137] The method is suitable for being implemented by the control system according to the first embodiment described above.

[0138] The method comprises a step of contacting the rotary button 14 by a user and rotating the outer ring 20 relative to the inner ring 18.

[0139] The user contact sensor detects this contact and transfers the information that a user is touching the rotary button 14 to the processing unit 36.

[0140] The method comprises acquiring the spatial coordinates of the conductive index 28 and controlling the emitter 38 to switch the light sources 34 from one of the configurations to the other as a function of the acquired spatial coordinates of the conductive index 28.

[0141] More specifically, the method comprises determining the angular switching-on and switching-off sectors and controlling the transmitter 38 so that each light source 34 arranged in the angular switching-on sector is in the switched-on configuration and for each light source 34 arranged in the angular switching-off sector is in the switched-off configuration.

[0142] Thus, only the photonic components 42 of each light source 34 located in the angular ignition sector emit light.

[0143] The lit region 30 of the translucent base body 26 of the outer ring 20 then corresponds to the region of the translucent base body 26 opposite the angular lighting sector.

[0144] The illuminated region 30 follows the rotation of the outer ring 20 relative to the ring interior 18.

[0145] The method also comprises controlling, as a function of the spatial coordinates of the driver's index finger 28, a function of the vehicle and / or a display on the touch screen 12.

[0146] A second embodiment of the control system 10 will now be described, with reference to [Fig. 3]. Only the differences between the first and second embodiments are described below.

[0147] In the second embodiment, the processing unit 36 ​​is configured to control the transition of all the light sources 34 from the off configuration to the on configuration, when a user touches the rotary button.

[0148] The light sources 34 then simultaneously switch from the off configuration to the on configuration.

[0149] In the second embodiment, the dynamic backlighting system 16 further comprises a blackout ring 46, the blackout ring 46 being attached to the outer ring 20.

[0150] The occulting ring 46 has an opaque annular base body 48 and at least one light-transmitting zone 50, preferably a single zone 50, such as an opening or a translucent region.

[0151] The light-transmitting zone 50 is arranged so that it only allows light to pass from one of the windows 24 of the inner ring 18.

[0152] The light-transmitting zone 50 preferably has a length, taken orthoradially to the central axis, greater than or equal to the orthoradial length of each window 24.

[0153] The illuminated region 30 of the translucent base body 26 of the outer ring 20 then corresponds to the region of the translucent base body 26 opposite said light-transmitting zone 50.

[0154] The conductive index 28 is positioned at the light-transmitting zone 50, and preferably is radially aligned with the latter.

[0155] A method for controlling at least one function of a vehicle, according to a second embodiment, will now be described.

[0156] The method is suitable for being implemented by the control system according to the second embodiment described above.

[0157] The method comprises a step of contacting the rotary button 14 by a user.

[0158] The user contact sensor detects this contact and transfers the information that a user is touching the rotary button 14 to the processing unit 36.

[0159] The method then comprises controlling the transition of all the light sources 34 from the off configuration to the on configuration.

[0160] The method then comprises a step of rotating the outer ring 20 relative to the inner ring 18, and therefore of the occulting ring 46 relative to the inner ring 18.

[0161] The light-transmitting zone 50 then follows the rotation of the outer ring 20.

[0162] The illuminated region 30 of the translucent base body 26 of the outer ring 20 then corresponds to the region of the translucent base body 26 opposite said light-transmitting zone 50. Thus, the illuminated region 30 follows the rotation of the outer ring 20.

[0163] The method also comprises controlling, as a function of the spatial coordinates of the driver's index finger 28, a function of the vehicle and / or a display on the touch screen 12.

[0164] Thanks to the characteristics previously described, the use of the control system 10 is more intuitive for the user because it allows him to follow the rotation of the rotary button 14 interactively from outside the button 14 by dynamic backlighting despite the absence of a wired connection between the rotary button 14 and the control unit 36.

[0165] Additionally, the dynamic backlighting system 16 adds an aesthetic appearance to the control system 10.

Claims

Claims

1. Control system (10) for at least one function of a vehicle, the control system (10) comprising a touch screen (12) and a rotary knob (14), the rotary knob (14) comprising an inner ring (18) fixed to the touch screen (12) and an outer ring (20) rotatably mounted relative to the inner ring (18), the outer ring (20) comprising a base body (26) and a conductive index (28), the base body (26) of the outer ring (20) being translucent and capable of diffusing light, the conductive index (28) being integral with the base body (26) and in contact with the touch screen (12); the control system (10) also comprising a dynamic backlighting system (16) of the outer ring (20) configured so that, during rotation by a user of the outer ring (20) relative to the inner ring (18),the translucent base body (26) of the outer ring (20) has a lit region (30) moving relative to the inner ring (18) following the rotation of the outer ring (20) relative to the inner ring (18), the dynamic backlighting system (16) comprising at least one light source (34) fixed to the inner ring (18), each light source (34) comprising at least one photonic component (42) and a receiver (44), the receiver (44) being adapted to receive an electric field external to the rotary button (14) and to power said at least one photonic component (42), each light source (34) being adapted to pass from an on configuration, in which said at least one photonic component (42) emits light while being powered by the receiver (44), to an off configuration, in which said at least one photonic component (42) does not emit any light.

2. Control system (10) according to claim 1, wherein the dynamic backlighting system (16) comprises a processing unit (36) and a transmitter (38), preferably integrated into the touch screen (12), the transmitter (38) being able to emit an electric field external to the rotary button, preferably an alternating electric field, the processing unit (36) being able to control the transmitter (38).

3. The control system (10) of claim 2, wherein the transmitter (38) and receiver (44) are also configured to exchange data to vary between the off configuration and the on confi- figure on.

4. Control system (10) according to any one of claims 2 or 3, wherein the dynamic backlighting system (16) further comprises a power supply system (40) for the transmitter, preferably integrated into the touch screen (12).

5. Control system (10) according to any one of the preceding claims, wherein the processing unit (36) of the dynamic backlighting system (16) is configured to control the transition, for said at least one light source (34), from the off configuration to the on configuration, when a user touches the rotary button (14).

6. A control system (10) according to any preceding claim, wherein the dynamic backlighting system (16) comprises a plurality of light sources (34) attached to the inner ring (18) and wherein the inner ring (18) comprises a base body (22) defining, for each light source (34), a window (24) arranged such that the light from the light source (34) is diffused radially outwardly of the rotary knob (14), each photonic component (42) preferably being arranged opposite the window (24).

7. A control system (10) according to any preceding claim, wherein the processing unit (36) of the dynamic backlighting system (16) is configured to control the switching of the or all of the light sources (34) from the off configuration to the on configuration, when a user touches the rotary knob (14), the backlighting system (16) further comprising a blackout ring (46), the blackout ring (46) being attached to the outer ring (20) and having an opaque annular base body (48) and a light-transmitting area (50), said lit region (30) of the translucent base body (26) of the outer ring (20) corresponding to the region of the translucent base body (26) opposite said light-transmitting area (50).

8. A control system (10) according to claim 7, taken in combination with claim 6, wherein the occulting ring (46) is arranged so that the light-transmitting area (50) allows light to pass from only one of the windows (24) of the inner ring (18).

9. A control system (10) according to any one of claims 2 to 6, wherein the processing unit (36) is configured to: - acquiring the spatial coordinates of the driver's index finger (28) on the touch screen (12); - controlling the transmitter (38) to switch said at least one light source (34) from one of the configurations to the other as a function of the acquired spatial coordinates of the conductive index (28), said lit region (30) of the translucent base body (26) of the outer ring (20) corresponding to the region of the translucent base body (26) opposite the or each light source (34) in the lit configuration.

10. The control system (10) of claim 9, wherein the dynamic backlighting system (16) comprises a plurality of light sources (34) and wherein the processing unit (36) is also configured to: - determining from the acquired spatial coordinates, an angular ignition sector and an angular extinction sector and, - controlling the transmitter (38) so that each light source (34) arranged in the angular ignition sector is in the lit configuration and for each light source (34) arranged in the angular extinction sector is in the extinguished configuration, said lit region (30) of the translucent base body (26) of the outer ring (20) corresponding to the region of the translucent base body (26) opposite the angular ignition sector.

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