Method and device for controlling a human-machine interface of a vehicle driver attention monitoring system

Abstract

The present invention relates to a method and device for controlling a Human-Machine Interface (HMI) of a Digital Management System (DMS) intended to be displayed on a vehicle touchscreen and controlled by a vehicle device. The method generates (102, 105, 106) control signals for displaying graphic content in a first and second zone of the HMI following touch actions by a vehicle user on the first zone (103), and according to the operating state of the DMS (101) and the driver's level of attention (104). This graphic content is representative of the driver's level of attention and the operating state of the DMS. Figure 9 (for the abstract)

Description

Description Title of the invention: Method and device for controlling a human-machine interface of an attention monitoring system of a vehicle driver technical field

[0001] = The present invention relates to methods and devices for controlling an interface human-machine interface of a vehicle driver attention monitoring system, for example, a motor vehicle. Technological background

[0002] — Contemporary vehicles carry an increasing number of embedded systems that participate in vehicle control by assisting the driver and / or the comfort of the driver and passengers of the vehicle. Some of these systems are known as ADAS systems (from the English "Advanced Driver- Assistance System” or in French “Advanced Driving Assistance System”).

[0003] — The vehicle driver attention monitoring system, also known as the name driver attention monitor or fatigue alert system of the driver, abbreviated DMS system (from the English "Driver Monitoring System") is one of these ADAS systems.

[0004] — A DMS system includes one or more cameras positioned at the front from inside the vehicle in order to capture videos of the driver's face vehicle. One (or more) computers receive and analyze these captured videos and determines output values ​​representative of the driver's level of attention vehicle, that is to say levels of drowsiness, fatigue and / or distraction of the driver. Warning lights are then activated and / or graphic content is then displayed. displayed on screens according to these output values ​​to indicate to the driver of the assess his level of attention and possibly advise him to take a break. Among these indicators are those that show the activation status of the DMS system. which is either activated or deactivated, or those that indicate whether the DMS system is activated. is operational or not, that is, whether the camera(s) is / are not obstructed, whether the cal- DMS system parameters provide the expected output values ​​and if the face of the The driver is visible (the driver's eyes and mouth are visible). Among the graphic content, we can cite those that are representative of messages information and which are displayed to explain the reasons for a malfunction of the DMS system (camera malfunction, driver wearing glasses or a mask, etc.)

[0005] It is known to control a DMS system via a human-user interface A graphical user interface (HMI). The HMI may include control knobs and / or buttons combined with graphical content displayed on a touchscreen. The driver or a passenger can thus interact with the DMS using the knobs and buttons and view output values ​​on this screen. Current HMIs have flaws that need to be addressed. First, the graphical content related to the DMS system is only displayed when the DMS is activated. This requires the driver or passenger to navigate menus on the touchscreen and / or use buttons and / or dials to activate the DMS. It is also common to have to navigate settings menus to configure the DMS and choose which graphical information will be displayed on the screen when the DMS is activated and / or when a minimum level of attention is exceeded. Current INMs in DMS systems need to be improved to enhance their ergonomics and the readability of information from these DMS systems. Summary of the present invention One object of the present invention is to solve at least one of the problems of the technological background described above. Another object of the present invention is to improve the ergonomics of a human-machine interface of a DMS system. Another object of the present invention is to improve the readability of information displayed by a human-machine interface of a DMS system. According to a first aspect, the present invention relates to a method for controlling a human-machine interface of a driver attention monitoring system for a vehicle, said human-machine interface, referred to as HMI, being intended to be displayed on a touch screen of the vehicle and being controlled by a device of the vehicle, said method comprising the following steps: - obtaining a first signal representative of a state of operation of the system; - generation of a first control signal to display a first graphic content in a first area of ​​the HMI, the first graphic content graphically representing the operating state of the system; detection of a touch action by a vehicle user on the first area ; - if the system's operating status indicates that the system is operational rational and if a touch action is detected on the first zone, obtaining a second signal representative of the driver's level of attention vehicle : - if the driver's level of attention is above a first value threshold then generation of a second display control signal second graphic content in a second area of ​​the UI, the second graphic content being representative of the driver's level of attention vehicle ; - if the system's operating status indicates that the system is operational rationally, that a tactile action is detected on the first area and that the The second graphic content is displayed in the second area, generation a third control signal to suppress the display of second graphic content. The process improves the ergonomics of the HMI of a DMS system because this HMI is implemented on a single touch screen instead of being implemented by combining graphic content displayed on a screen and actions on buttons / wheels as in current HMIs of DMS systems. The method allows for the display of graphical content representing information related to the DMS system even when the DMS is inactive, and enables direct interaction by the driver or a passenger with this graphical content to control the DMS. This direct control of the HMI improves the ergonomics, readability, and comprehensibility of the DMS system's HMI. According to one variant, if the driver's level of attention is below the first threshold value, the process further includes the following steps: - generation of a fourth flashing display control signal of a third graphic content in the first zone for a first duration, the third graphic content indicating that the driver's attention level is below the first threshold value; - generation of a fifth control signal to display a fourth graphic content in the second zone for a second duration shorter than the first duration, the fourth graphic content being representative of an alert message; - generation of a signal carrying an audio message intended to be broadcast in a vehicle's passenger compartment during the second duration. According to one variant, if a touch action is detected on the first zone during the first duration but after the expiry of the second duration, the process further includes a step of generating the fifth control signal. According to one variant, if a touch action is detected on the first area during the first duration but after the expiry of the second duration, the process further includes a step of generating a signal carrying an audible message intended to be broadcast in a vehicle interior during the second duration. According to one variant, if the system's operating status indicates that the system is not operational and a touch action is detected on the first zone, the method further includes a step of generating a sixth control signal to display a fifth graphic content in the second zone, the fifth graphic content being representative of a message explaining the operating state of the system. According to one variant, if a touch action on the first zone for a third duration exceeding a second threshold value is detected, the method further includes a step of generating a seventh control signal to activate the system if the operating state of the system indicates that the system is not operational and an eighth control signal to deactivate the system if the operating state of the system indicates that the system is operational. According to one variant, the system's operating status indicates that the system is operational if at least one camera in the system is operational and / or if the system produces a driver attention level. According to a second aspect, the present invention relates to a control device for a human-machine interface of a vehicle driver attention monitoring system, the device comprising a memory associated with a processor configured for the implementation of the steps of the process according to the first aspect of the present invention. According to a third aspect, the present invention relates to a control system for a human-machine interface of a vehicle driver attention monitoring system comprising a device according to the second aspect of the present invention and at least one camera mounted in the vehicle. According to a fourth aspect, the present invention relates to a vehicle, for example of the automobile type, comprising a device according to the second aspect of the present invention or a system as described above according to the third aspect of the present invention. According to a fifth aspect, the present invention relates to a computer program which includes instructions adapted for the execution of the steps of the process according to the first aspect of the present invention, in particular when the computer program is executed by at least one processor. Such a computer program may use any programming language, and be in the form of source code, object code, or an intermediate form between source code and object code, such as in a partially compiled form, or in any other desirable form. According to a sixth aspect, the present invention relates to a computer-readable recording medium on which is recorded a computer program comprising instructions for executing the steps of the process according to the first aspect of the present invention. On the one hand, the recording medium can be any entity or device capable of storing the program. For example, the medium can include a storage means, such as a ROM, a CD-ROM or a microelectronic circuit-type ROM, or a magnetic recording means or a hard drive. On the other hand, this recording medium can also be a transmissible medium such as an electrical or optical signal, such a signal being able to be transmitted via an electrical or optical cable, by conventional or radio frequency, by self-directing laser beam, or by other means. The computer program according to the present invention can, in particular, be downloaded from an Internet-type network. Alternatively, the recording medium may be an integrated circuit in which the computer program is incorporated, the integrated circuit being adapted to execute or to be used in the execution of the process in question. Brief description of the figures Other features and advantages of the present invention will become apparent from the description of the specific and non-limiting embodiments of the present invention below, with reference to the attached Figures 1 to 9, in which: [Fig.1] schematically illustrates a vehicle, according to a particular and non-limiting example of the present invention; [Fig.2] schematically illustrates an INM 20 of the vehicle's on-board DMS system of [Fig.1], according to a particular and non-limiting embodiment of the present invention; [Fig.3] illustrates a system 3 configured to control the HMI 2 of [Fig.2] to be displayed on screen 102, according to a particular embodiment of the present invention. [Fig.4] schematically illustrates the HMI 2 of the vehicle's on-board DMS system of [Fig.1], according to a particular and non-limiting embodiment of the present invention; [Fig.5] schematically illustrates the HMI 2 of the vehicle's on-board DMS system of [Fig.1], according to a particular and non-limiting embodiment of the present invention; [Fig.6] schematically illustrates the HMI 2 of the vehicle's on-board DMS system of [Fig.1], according to a particular and non-limiting embodiment of the present invention; [Fig.7] schematically illustrates the HMI 2 of the vehicle's on-board DMS system of [Fig.1], according to a particular and non-limiting embodiment of the present invention; [Fig.8] schematically illustrates a device configured to control an HMI of a DMS system embedded in the vehicle of [Fig.1], according to a particular and non-limiting embodiment of the present invention; [Fig.9] illustrates a flowchart of the different stages of a control process for an HMI of a DMS system embedded in the vehicle of [Fig.1], according to a particular and non-limiting example of the present invention. Description of examples of achievements A method and device for controlling an INM of a DMS system embedded in a vehicle will now be described in what follows with joint reference to figures 1 to 9. The same elements are identified with the same reference signs throughout the description that follows. According to a particular and non-limiting embodiment of the present invention, a user interface (UI) of a vehicle-mounted DMS system, intended to be displayed on a vehicle touchscreen, is controlled by a device in the vehicle. The device obtains a first signal representing an operating state of the system and generates a first command signal to display initial graphic content in a first area of ​​the UI, this initial graphic content graphically representing the operating state of the DMS system. The device then detects a touch action by a vehicle user on this first area.If the DMS system's operating status indicates that the DMS is operational, and a touch action is detected in the first zone, the device receives a second signal representing the driver's attention level. If the driver's attention level exceeds a first threshold value, the device generates a second command signal to display a second graphic content in a second zone of the HMI. This second graphic content represents the driver's attention level. If the system's operating status indicates that the DMS is operational, a touch action is detected in the first zone, and the second graphic content is displayed in the second zone, the device generates a third command signal to suppress the display of the second graphic content. Figure 1 schematically illustrates a vehicle 10, according to a particular and non-limiting embodiment of the present invention. Fig. 1 presents a view of the interior of a vehicle 10, in particular of the front part of the passenger compartment of the vehicle 10 including in particular the steering wheel, the dashboard, the driver's seat (front left seat according to the example in Fig. 1)), the front passenger seat (front right seat according to the example in Fig. 1) and the windscreen of the vehicle 10. Vehicle 10, for example, corresponds to a vehicle with an internal combustion engine, electric motor(s) or a hybrid vehicle with a combustion engine and one or more electric motors. Vehicle 10 thus corresponds, for example, to a land vehicle, such as a car, a truck, or a bus. The vehicle 10 advantageously incorporates a camera 101 whose lens is directed inwards to capture images of the driver's behavior while seated in the driver's seat. The camera 101 is, for example, mounted on or integrated into the dashboard of the vehicle 10, for instance, near the steering wheel. The camera 101's viewpoint is directed towards the driver's seat to produce videos of the driver's face. The vehicle's interior 10 also includes a display screen 102, for example arranged in the center of the dashboard. Camera 101, for example, corresponds to: - an infrared camera; - RGB (Red, Green, Blue) image acquisition camera; or - image acquisition camera associated with one or more devices (for example one or more LEDs (Light-Emitting Diode) emitting light in the infrared or near-infrared band. Camera 101 belongs to a DMS system that monitors the driver's attention level and alerts the driver when drowsiness is occurring, when a decrease in driver attention is detected, or when the driver is found to be distracted. Screen 102 is configured for displaying graphic content from a THM under the control of a computer in the infotainment system, called the TVI computer (from the English "In-Vehicle Infotainment" or in French "Infodivertissement étoilé") of the vehicle 10. Screen 102 is equipped with a touch interface allowing a person on board the vehicle to interact with an HMI 2 of the DMS system displayed on this screen 102. A GUI such as IFIM 2, for example, corresponds to a stack of layers, each layer displaying a specific set of graphical content. The layering of these elements produces the GUI rendering. The graphical content to be displayed is advantageously contained within a single layer, for example, the top layer of the stack. As an example, the layer stack comprises five layers numbered from 1 to 5, with the layer containing the graphical content corresponding to the 5th layer, that is, the layer placed on top of the other layers. Figure [Fig.2] schematically illustrates the HMI 20 of the vehicle's on-board DMS system of [Fig.1], according to a particular and non-limiting embodiment of the present invention. The HMI 2 comprises two distinct areas 20 and 21. Graphic content is displayed in each of these areas of the HMI 2 and the driver or a passenger of the vehicle 10 can change this graphic content and control the DMS system by pressing on area 20 as explained later. Each piece of graphic content is a graphic icon that can carry a written message or a pictogram of a specific color. The DMS system is controlled by activating / deactivating it, adjusting the values ​​of certain DMS parameters, and / or obtaining DMS output values. An output value could be, for example, the driver's attention level (10), i.e., the driver's level of drowsiness, fatigue, and / or distraction. The present invention is not limited to particular output values ​​of a DMS system nor to graphical content representing these output values. Figure 3 illustrates a system 3 configured to control the HMI 2 of Figure 2 to be displayed on screen 102, according to a particular embodiment of the present invention. System 3 is advantageously integrated into the vehicle 10, in which the HMI 2 described opposite [Fig. 2] is to be displayed on the screen 102. System 3 comprises one or more control units, for example 30, 31, 32, and 33, of the ECU (Electronic Control Unit) type. An ECU consists of an electronic computer and one or more embedded software programs that implement one or more control functions. System 3 also includes a device 34 for controlling the HMI 2 to be displayed on the screen 102. Device 34 and computers 30 to 33 are advantageously connected in communication via a wired link, for example a CAN (Controller Area Network) type data bus, CAN FD (Controller Area Network Flexible Data-Rate), FlexRay (standardized by ISO 17458) or Ethernet (standardized by ISO / IEC 802-3). According to the architecture of [Fig. 3], the control unit 30 corresponds, for example, to a master control unit, and each of the control units 31 to 33 corresponds to a slave control unit of the master control unit 30. The control unit 30 corresponds, for example, to a control unit in charge of the IVI system (from the English "In Vehicle Infotainment" or in French "Info-divertissement dans le véhicule"), the control unit 30 being also referred to as the IVI control unit 30. The IVI control unit 30 is thus in charge of the info- vehicle entertainment 10 providing audio and video access inside the vehicle, such as internet access, access to traffic information, navigation, digital broadcasting and streaming services as well as signal relay to computers 30 to 33. The IVI 30 computer can receive signals emitted by the computer 33 which is then in charge of obtaining output values ​​from the DMS system. For example, the signals emitted by the computer 33 carry output values ​​that are representative of an operating state of the DMS system and / or a level of attention of the driver of the vehicle 10. The IVI 30 control unit can generate information to be displayed on devices installed in the vehicle, such as graphic content to be displayed on the screen 102 controlled by the control unit 31, or audio messages to be displayed on an audio device controlled by the control unit 32 or on several speakers. Each of these devices is, for example, controlled by a control unit 31 or 32, which receives the signals carrying the graphic content to be displayed on the device associated with the relevant control unit. For example, the IVI 30 computer can generate graphic content and send a signal carrying this graphic content to the computer 31. Upon receiving this signal, the computer 31 extracts the graphic content and controls the display of this graphic content on the screen 102 that it controls. For example, the IVI 30 computer can also generate a signal carrying a sound message which it transmits to the computer 32. Upon receiving this signal, the computer 32 extracts the sound message and controls an audio device to reproduce this sound message. The present invention is not limited to the implementation of the control of the HMI 2 of [Fig.2] by the system 3 of [Fig.3] but extends to any other computer system controlling vehicle peripherals 10 which are adapted to control the screen 102 and possibly an audio peripheral. Device 34 of [Fig.3] is dedicated to the implementation of a control process for HMI 2 of [Fig.2]. The operations forming such a process are described below. Such a process is advantageously implemented by one or more computers of the vehicle 10 from output values ​​of a DMS system embedded in the vehicle 10. In the first operation of the process, device 34 obtains a first signal S1 representing an operating state of the DMS system. This first signal S1 is emitted, for example, by device 33. According to one variant, the operating status of the DMS system indicates that the system DMS is operational if the DMS system is activated, if at least one camera 101 of the DMS system is operational, i.e. it is producing videos of the driver's face in the vehicle and the DMS system is producing a driver attention level i.e., for example, that the computer 33 is producing output values. If any of these conditions are not met, the DMS system's operating status indicates that it is not operational. Device 33 then generates informational messages explaining the reason(s) for this DMS operating status. One of these informational messages might indicate, for example, that the driver's eyes or mouth are not visible, or that the control unit 33 or the camera 101 is inoperative. In a second operation, the device 34 generates a first SCI signal to control the display of a first graphic content C1 in the first area 20 of the HMI 2 ([Fig.4]), the first graphic content C1 graphically representing the operating state of the DMS system. For example, the CI graphic content is a pictogram of one color (e.g., green) if the DMS system operating status indicates that the DMS system is operational and of another color (e.g., orange) if the DMS system operating status indicates that the DMS system is not operational. In a third operation, the device 34 detects a touch action by a user (driver or passenger) of the vehicle 10 on the first zone 20. If the operating status of the DMS system indicates that the DMS system is operational and if a touch action is detected on the first zone 20, in a fourth operation, the device 34 obtains a second signal S2 representative of a level of attention of the driver of the vehicle 10. According to a variant of the fourth operation, the driver attention level of vehicle 10 is obtained from the DMS system. According to a variant of the fourth operation, the driver's attention level of vehicle 10 is obtained from an on-board memory of vehicle 10. If the driver's attention level is above a first threshold value TH1 then, in a fifth operation, the device 34 generates a second SC2 control signal to display a second graphic content C2 in the second zone 21, the second graphic content C2 being representative of the driver's attention level in the vehicle. According to the example illustrated in (Fig. 4), the driver's level of attention is represented by a level of drowsiness and a level of distraction. The graphic content C2 then includes, for example, a first bar at level 210 representing a level of driver drowsiness and a second bar at Level 211 represents a level of driver distraction. These levels of drowsiness and distraction are carried by the second SC2 control signal. According to one variant, illustrated in [Fig.4], if the DMS system is activated, the graphic content C2 includes a graphic element 212 indicating that the DMS system is activated. For example, this graphic element 212 can be a pictogram carrying an information message indicating that the DMS system is activated. If the operating state of the DMS system indicates that the DMS system is operational, that a touch action is detected on the first zone 20 and that the second graphic content C2 is displayed in the second zone 21, in a sixth operation, the device 34 generates a third SC3 control signal to suppress the display of the second graphic content C2. According to one variant of the process, if the driver's attention level is below the first THI threshold value, the process includes a seventh, eighth, and ninth operation. In the seventh operation, device 34 generates a fourth SC4 control signal to flash a third graphic content C3 in the first zone 20 for a first duration D1. The third graphic content C3 indicates that the driver's attention level is below the first threshold value THI. For example, graphic content C3 is a pictogram of one color (e.g. green) if the driver's attention level is above the first threshold value TH1 and of another color (e.g. orange) if the driver's attention level is below the first threshold value THI. Figure 5 illustrates the blinking of graphic content C3 by a star surrounding the first zone 20. In the eighth operation, the device 34 generates a fifth SC5 control signal to display a fourth graphic content C4 in the second zone 21 for a second duration D2 less than the first duration D1, the fourth graphic content C4 being representative of an alert message ([Fig.6]). In the ninth operation, device 34 generates a signal carrying an audio message intended to be broadcast in a vehicle's interior during the second duration. For example, the signal is emitted by device 34 to computer 32 via IVI computer 30. Computer 32 then controls an audio device to reproduce the sound message carried by this signal. According to a variant of the process, if a touch action is detected on the first zone 20 during the first duration D1 but after the expiration of the second duration D2, the device 34 generates the fifth SC5 control signal again so that the fourth graphic content C4 is displayed again in the second zone 21 during the second duration D2 (eighth operation). According to a variant of the method, if a touch action is detected on the first zone 20 during the first duration D1 but after the expiry of the second duration D2, the device 34 also emits an audible signal in a vehicle interior during the second duration D2 (ninth operation). According to a variant of the process, if the system's operating state indicates that the system is not operational and a touch action is detected on the first zone 20, in a tenth operation, the device 34 generates a sixth SC6 control signal to display a fifth graphic content C5 in the second zone 21, the fifth graphic content C5 being representative of an information message about the system's operating state ([Fig.7]). For example, the information message may explain that the camera is not in working order, or that the DMS system is experiencing a problem and cannot provide output values, or that the driver's face is not sufficiently visible. According to a variant of the method, if a touch action on the first zone 20 for a third duration D3 greater than a second threshold value TH2 is detected, the device 34 generates a seventh SC7 command signal to activate the DMS system if the operating state of the DMS system indicates that the DMS system is not operational and an eighth SC8 command signal to deactivate the DMS system if the operating state of the DMS system indicates that the DMS system is operational. Figure 8 schematically illustrates a device 34 configured to control a human-machine interface of a DMS system embedded in the vehicle 10 of Figure 1 according to a particular and non-limiting embodiment of the present invention. Device 34 is, for example, configured to carry out the operations described opposite Figures 1 to 7 and / or the steps of the process described opposite [Fig. 8]. Examples of such a device 34 include, but are not limited to, embedded electronic equipment such as a vehicle's on-board computer, an electronic computer such as an ECU (Electronic Control Unit), a smartphone, a tablet, or a laptop computer. The elements of device 34, individually or in combination, can be integrated into a single integrated circuit, into several integrated circuits, and / or into discrete components. Device 34 can be implemented as electronic circuits or software (or computer) modules, or a combination of electronic circuits and software modules. The device 34 includes one (or more) processor(s) 340 configured to execute instructions for carrying out the steps of the process and / or for executing instructions from the software embedded in the device 34. The processor 340 may include integrated memory, an input / output interface, and various circuits known to those skilled in the art. The device 34 further includes at least one memory 341, for example, volatile and / or non-volatile memory, and / or includes a memory storage device that may include volatile and / or non-volatile memory, such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, flash, magnetic disk, or optical disk. The computer code of the embedded software(s) including the instructions to be loaded and executed by the processor is, for example, stored on memory 341. According to various specific and non-limiting embodiment examples, the device 34 is coupled in communication with other similar devices or systems, for example other computers, and / or with communication devices, for example a TCU (Telematic Control Unit), for example via a communication bus or through dedicated input / output ports. According to a particular and non-limiting embodiment, the device 34 includes a block 342 of interface elements for communicating with devices external to the vehicle 10. The interface elements of the block 342 include one or more of the following interfaces: - radio frequency RF interface, for example of type W1-Fi® (according to IEEE 802.11), for example in the frequency bands at 2.4 or 5 GHz, or of type Bluetooth® (according to IEEE 802.15.1), in the frequency band at 2.4 GHz, or of type Sigfox using UBN radio technology (from the English Ultra Narrow Band, in French bande ultra étroite), or LoRa in the frequency band 868 MHz, LTE (from the English "Long-Term Evolution" or in French "Evolution à long terme"), LTE-Advanced (or in French LTE-avancé); - USB interface (from the English "Universal Serial Bus" or "Universal Serial Bus" in French); - HDMI interface (from the English "High Definition Multimedia Interface", or "High Definition Multimedia Interface" in French); - LIN interface (from the English "Local Interconnect Network", or in French "Réseau interconnecté local"). According to another specific and non-limiting embodiment, the device 34 includes a communication interface 343 which enables communication with other devices (such as other computers in the embedded system) via a communication channel 3430. The communication interface 343 corresponds for example to a transmitter configured to transmit and receive information and / or data via the 3430 communication channel. The 343 communication interface corresponds for example to a wired network of type CAN (from the English "Controller Area Network" or in French "Réseau de contrôlers"), CAN FD (from the English "Controller Area Network Flexible Data-Rate" or in French "Réseau de contrôlers à débit de données flexible"), FlexRay (standardized by the ISO 17458 standard) or Ethernet (standardized by the ISO / IEC 802-3 standard). According to a particular and non-limiting embodiment, the device 34 can provide output signals to one or more external devices, such as a display screen 3440, touch or non-touch, one or more audio rendering devices 3450 and / or other peripherals 3460 via output interfaces 344, 345 and 346 respectively. According to a variant, one or more of the external devices is integrated into the device 34. Figure 9 illustrates a flowchart of the various steps in a method for controlling an IBM of a DMS system embedded in the vehicle of Figure 1, according to a particular and non-limiting embodiment of the present invention. The method is implemented, for example, by a device embedded in the vehicle 10 or by the device 34 of Figure 8. In a first step 101, the device 34 obtains a first signal SI representative of an operating state of the DMS system. In a second step 102, the device 34 generates a first SCI signal to control the display of a first graphic content C1 in the first area 20 of the HMI 2, the first graphic content C1 graphically representing the operating state of the system. In a third 103, the device 34 detects a touch action by a user (driver or passenger) of the vehicle 10 on the first zone 20. If the operating status of the DMS system indicates that the DMS system is operational and if a touch action is detected on the first zone 20, in a fourth step 104, the device 34 obtains a second signal S2 representative of a level of attention of the driver of the vehicle 10. If the driver's attention level is above a first threshold value TH1 then, in a fifth step 105, the device 34 generates a second SC2 control signal to display a second graphic content C2 in the second zone 21, the second graphic content C2 being representative of the driver's attention level in the vehicle. If the DMS system's operating status indicates that the DMS system is operational, that a touch action is detected on the first zone 21, and that the second graphic content C2 is displayed in the second zone, in a sixth step 106, Device 34 generates a third SC3 control signal to suppress the display of the second graphic content C2. According to one variant, if the driver's level of attention is below the first THI threshold value, the process includes the following seventh, eighth, and ninth steps. In the seventh step 107, the device 34 generates a fourth SC4 control signal to flash a third graphic content C3 in the first zone 20 for a first duration D1. The third graphic content C3 indicates that the driver's attention level is below the first threshold value. In the eighth step 108, the device 34 generates a fifth SC5 control signal to display a fourth graphic content C4 in the second area 21 for a second duration D2 less than the first duration D1, the fourth graphic content C4 being representative of an alert message. In the ninth step 109, device 34 generates a signal carrying an audio message intended to be broadcast in a vehicle interior during the second duration D2. According to a variant of the process, if the system's operating state indicates that the system is not operational and a touch action is detected on the first zone 20, in a tenth step 110, the device 34 generates a sixth SC6 control signal to display a fifth graphic content C5 in the second zone 21, the fifth graphic content C5 being representative of a message explaining the system's operating state. According to one variant, the variants and examples of the operations described in relation to Figures 1 to 7 apply to the steps of the process in [Fig.9]. Of course, the present invention is not limited to the embodiments described above but extends to a method for controlling a human-machine interface of a driver attention monitoring system, which would include secondary steps without falling outside the scope of the present invention. The same would apply to a device configured for implementing such a method. The present invention also relates to a system comprising device 34 of [Fig.8] connected in communication, for example wired, with one or more cameras. The present invention also relates to a vehicle, for example an automobile or more generally an autonomous land-powered vehicle, comprising the device 34 of [Fig.8] or the system described above.

Claims

Claims

1. Method for controlling a human-machine interface of a system monitoring the attention of a vehicle driver, said interface human-machine interface, called HMI, intended to be displayed on a screen touchscreen of the vehicle and being controlled by a device of the vehicle, said method comprising the following steps: - obtaining (101) a first signal (S1) representative of a state of system operation; - generation (102) of a first display control signal (SCI) of a first graphic content (C1) in a first zone of the HMI, the first graphical content graphically representing the state of func- system operation; - detection (103) of a tactile action of a user of the vehicle on the first zone; - if the operating status of the system indicates that the system is opera- rational and if a tactile action is detected on the first zone, obtaining (104) a second signal (S2) representative of a level attention of the vehicle driver: - if the driver's level of attention is higher than a first threshold value (TH1) then generation (105) of a second signal (SC2) control of display of a second graphic content (C2) in a second area of ​​the HMI, the second graphic content being re- presentation of the level of attention of the driver of the vehicle; - if the operating status of the system indicates that the system is opera- rational, that a tactile action is detected on the first zone and that the second graphic content is displayed in the second area, ge- generation (106) of a third suppression control signal (SC3) of the display of the second graphic content (C2).

2. A method according to claim !, wherein if the level of attention of the driver of the vehicle is lower than the first threshold value (TH1), the method further comprises the following steps: - generation (107) of a fourth control signal (SC4) flashing display of a third graphic content (C3) in the first zone for a first duration, the third content graph (C3) indicating that the driver's attention level is lower than the first threshold value; - generation (108) of a fifth control signal (SCS) displaying a fourth graphic content (C4) in the second area for a second duration less than the first duration, the fourth graphic content being representative of an alert message; - generation (109) of a signal carrying a sound message intended for be broadcast in a passenger compartment of the vehicle during the second duration.

3. The method of claim 2, wherein if a touch action is detected on the first zone during the first duration but after the expiration of the second duration, the method further comprises a step of generating (108) the fifth control signal (SC5).

4. Method according to claim 2 or 3, for which if a touch action is detected on the first zone during the first duration but after the expiration of the second duration, the method further comprises a step of generating (109) a signal carrying a sound message intended to be broadcast in a vehicle cabin during the second duration.

5. Method according to one of claims 1 to 4, for which if the state of system operation indicates that the system is not opera- rational and a tactile action is detected on the first zone, the method further comprises a step of generating (110) a sixth signal (SC6) for controlling the display of a fifth content graphic (C5) in the second zone, the fifth graphic content being representative of a message explaining the operating state- operation of the system.

6. Method according to one of claims 1 to 5, for which if an action touch on the first zone for a third duration greater than a second threshold value (TH2) is detected, the method comprises in in addition to a step of generating (111) a seventh signal (SC7) of system activation command if the operating status of the system indicates that the system is not operational and an eighth signal (SC8) for controlling the system deactivation if the operating state- operation of the system indicates that the system is operational.

7. Method according to one of the preceding claims, for which the state of system operation indicates that the system is operational if at at least one camera in the system is operational and / or if the system produces a level of driver attention.

8. Computer program comprising instructions for implementing implementation of the method according to any one of the preceding claims preceding, when these instructions are executed by a processor.

9. Device (3) for controlling an on-board system of a vehicle, said device (3) comprising a memory (31) associated with at least one processor (30) configured to implement the steps of the method according to any one of claims | to 7.

10. Vehicle (10) comprising the device (3) according to claim 9.