FR3063357A1 - DEVICE FOR DISPLAYING INFORMATION IN A MOTOR VEHICLE HABITACLE - Google Patents

Abstract

An information display device (100) relating to a motor vehicle (200) comprises a control module (110) capable of obtaining information relating to a motor vehicle and communicating them to at least one display medium. The device comprises a plurality of display media among which display means (120) able to display said information on a defined display area of the motor vehicle (200) and a mobile display device (130), the module controller (110) being configured to communicate said information to the mobile display device (130) and / or the display means (120) according to the position of the mobile display device (130) in the passenger compartment (210) .

Description

Agent (s): VALEO VISION Limited company.

FR 3 063 357 - A1

DEVICE FOR DISPLAYING INFORMATION IN A MOTOR VEHICLE COCKPIT.

_ A display device (100) for information relating to a motor vehicle (200) comprises a control module (110) capable of obtaining information relating to a motor vehicle and of communicating it to at least one display medium .

The device comprises a plurality of display supports among which display means (120) capable of displaying said information on a defined display area of the motor vehicle (200) and a mobile display device (130), the module control device (110) being configured to communicate said information to the mobile display device (130) and / or to the display means (120) according to the position of the mobile display device (130) in the passenger compartment (210) .

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DEVICE FOR DISPLAYING INFORMATION IN A MOTOR VEHICLE INTERIOR

The present invention relates to the technical field of motor vehicles 5 and more particularly to display devices intended to be present in a passenger compartment of a motor vehicle for displaying information relating to said vehicle.

Driving a motor vehicle requires real-time knowledge of information relating to its operation, such as speed, range, engine temperature, etc. In known manner, the information necessary for safer driving is transmitted to the driver by means of a display device located at or near the steering wheel so as to be visible to the driver. More specifically, a display screen can for example be integrated into the dashboard, behind the steering wheel. In this case, the display screen is difficult to see by other occupants of the vehicle.

In order to remedy this problem, some vehicles offer the integration of a display screen in the center of the dashboard, that is to say, at the level of the center line of the passenger compartment. However, this solution has the disadvantage of decentring the display screen relative to the driver's field of vision. As a result, the driver is obliged to look away from the road to read information relating to the vehicle. This solution is therefore not fully satisfactory, and unnecessary moreover when the passenger compartment is occupied only by the driver.

It should be noted that the display screens are the same size for the same type of vehicle, in particular to standardize and therefore minimize production costs. It is therefore not possible to adapt the size of a display screen to suit each driver. However, the desired visual comfort depends on each driver, so that some people want a large display in order to visualize more easily and / or a greater amount of information relating to the vehicle, while some people want a more discreet display. for aesthetic reasons.

Furthermore, the aim is to develop the placing on the market of vehicles comprising an autonomous driving mode enabling it to manage the management of the steering controls of the vehicle automatically. In this case, the driver’s attention may not be paid to the road scene and / or the steering controls. In particular, the driver of such an autonomous vehicle configured in autonomous driving mode may be reading a book, chatting with a passenger at the front of the vehicle, or even be turned towards the bitter seats. In such cases, the display screen may be out of the driver's field of vision.

The invention is part of this context and aims to provide an alternative to display devices for displaying information relating to the vehicle inside the passenger compartment.

The present invention provides in particular a device for displaying information relating to a motor vehicle which comprises a control module able to obtain information relating to a motor vehicle and to communicate it to at least one display medium.

The information display device comprises a plurality of display media, including display means capable of displaying said information on a fixed information display area of the motor vehicle and a mobile display device. And the control module is configured to communicate said information to the mobile display device and / or to the display means as a function of the position of the mobile display device in the passenger compartment.

The term "passenger compartment" means a space in the vehicle dedicated to the transportation of passengers. And by information relating to a motor vehicle, is meant information relating to the operation of the vehicle, such as its speed, its engine speed, the temperature of its engine, its range, the wear of a part, or related to the navigation of the vehicle and in particular the route to follow.

Thus, according to the invention, the information display device allows a user present in the passenger compartment of the motor vehicle to take cognizance of information relating to the vehicle, preferably relating to its operation and / or to its safety on at least one display medium, and the most suitable for taking cognizance of this information according to the position of the user.

Advantageously, the display device is mobile to allow each user to position it freely in the passenger compartment so that information relating to the operation of the vehicle can be consulted easily and in real time. In particular, a driver can decide the position of the mobile display device in the passenger compartment according to its size, its position or the presence or not of other passengers. In the absence of a passenger, or when the driver must pay attention to the information displayed, the driver can place the mobile display device in front of him, at the level of the windshield, so as not to take his eyes off the road when consultation including navigation information. Conversely, in the presence of passengers, the driver can move the mobile display device so that information relating to the vehicle is accessible to other passengers.

It is understood that the mobile display device can consist of a mobile device supplied with the vehicle and the information display device according to the invention, or that it can consist of the occupant's own mobile display device of the vehicle, such as its touchscreen tablet or its “smartphone” type mobile phone.

As has been specified, it is possible according to the invention, and according to the position of the mobile display device with respect to the fixed information display area, to communicate the information relating to the vehicle on a display support of fixed information, on a mobile information display or on both simultaneously. By way of nonlimiting examples, provision may be made to communicate information only on the mobile display device when the latter is arranged in overlap with the fixed information display area, or else when the movement of the mobile viewing is due to the driver seeing this information projected there and that he does not wish to project this information in duplicate. Provision may also be made to communicate information only on the fixed information display area when the mobile display device is far from this area and when it is used by occupants of the vehicle who do not wish to see information. relating to the vehicle which could hinder their viewing of other content. Finally, provision may be made to communicate the information on the two supports, namely the fixed information display area and the mobile display device, in particular in the case of driving in autonomous mode. In such a mode, it is likely that the passenger will use the mobile viewing device, and it is desirable that the driver continues to have real-time access to vehicle information throughout the vehicle. cockpit. Thus, the driver is no longer required to be present at the driver's seat to supervise the autonomous driving of the vehicle. Indeed, the mobile display device allows it to have easy access to this information regardless of its position in the passenger compartment. As a result, the mobile visualization device allows the driver to modify his posture or change places to rest or chat with other passengers, while controlling in real time the information relating to the driving of the vehicle. For example, the driver can swivel his chair in order to face a passenger during a discussion and position the mobile display device on his lap so that he can consult permanently or regularly, information relating to the autonomous driving operation of the vehicle automobile. The size and selection of the information displayed on the mobile support and on the fixed information display area may vary, it being understood that in this embodiment, the information displayed on the mobile support is only presented for the purpose of summary monitoring by the driver and that more complete information continues to be displayed in the fixed information display area.

According to different characteristics of the invention, taken alone or in combination with one another, it can be provided that:

the control module is configured to transmit information relating to the vehicle to the display means in the event of detection of a position of the mobile display device at a distance from these display means, and therefore at a distance from the area of display of fixed information, and / or to transmit this information to the mobile display device in the event of the detection of an overlapping position of the fixed information display area by the mobile display device;

In other words, the display means allow the projection of the vehicle-related information onto a surface of the passenger compartment of the motor vehicle when the mobile display device is at a distance from, that is to say that it does not cover the defined fixed information display area of the motor vehicle.

Thus, the driver of the vehicle can have access to this information in the event of the absence or breakdown of the mobile display device, and in particular when the mobile display device is remote from the fixed information display area to be used. by other vehicle passengers than the driver. Thus, this embodiment allows a passenger to use the mobile display device without hindering the driving of the vehicle. Indeed, the display means are preferably arranged in the passenger compartment so as to display said information in the driver's field of vision, preferably as close as possible to the driver, such as in front of the driver at the level of the windshield of the passenger compartment. The mobile display device can then be used in a different way, for example as a reading light. The invention therefore allows greater freedom and flexibility in the use of the mobile viewing device.

the mobile display device comprises a docking station configured to keep the mobile display device overlapping or in the vicinity of the defined fixed information display area, said information relating to the vehicle being communicated to the display device mobile and / or to the display means as a function of the position of the mobile display device with respect to the docking station;

The docking station aims to allow the mobile display device to be kept stable in the passenger compartment of a motor vehicle during its movement. The docking station can be removable so as to allow a user to modify the position of the mobile display device in the passenger compartment according to its position and / or the presence of other passengers. According to an alternative embodiment, the docking station can be included in the passenger compartment, preferably at the level of a dashboard, in the form of a housing capable of receiving the mobile display device.

the docking station comprises means for detecting the maintenance of the mobile display device by the docking station; these means can be detect the presence of the mobile display device by contact or without contact;

- the mobile display device is configured to display information 10 relating to the motor vehicle when it is detached from the docking station;

Thus, advantageously, a user of the mobile display device can take cognizance of this information regardless of his position in the passenger compartment. This alternative embodiment offers greater safety in the use of the vehicle by allowing the passenger (s), without disturbing the driver, or else the driver, in the case of autonomous driving mode, to control the information in real time. relating to the vehicle.

- the mobile display device is configured to display other information when it is detached from the docking station; in particular, the mobile display device is configured to display, when it is detached from the docking station, simultaneously the information relating to the vehicle and other information, for example multimedia content;

For example, the mobile viewing device can thus allow its user to browse the Internet and / or consult these e-mails, a book, the weather or other content. This embodiment advantageously makes it possible to ensure automatic and regular monitoring of the behavior of the motor vehicle, while allowing a user of the mobile display device to perform other tasks with said device.

- the control module is configured to simultaneously display information relating to the motor vehicle on the fixed information display area and on the mobile display device when the latter is detached from the docking station.

According to a characteristic of the invention, the control module can comprise a communication unit able to communicate to the display means and to the mobile display device information transmitted by at least one sensor of the motor vehicle, and suitable detection means detecting the presence of the mobile display device in the passenger compartment of the motor vehicle.

The invention also relates to a passenger compartment for a motor vehicle 10 comprising a mobile display device as described above. The passenger compartment may include a dashboard including the docking station configured to hold the mobile display device at the dashboard level. According to another alternative embodiment, the passenger compartment includes a driving position and a passenger seat between which the docking station is located.

The invention also relates to a motor vehicle comprising a passenger compartment as described above. According to a preferred embodiment, the control module is able to be connected to an on-board computer of the vehicle. The on-board computer centralizes the various information emitted by sensors and / or components of the motor vehicle. This alternative offers the advantage of being more economical in connection means. According to another characteristic, the motor vehicle comprises an autonomous driving mode in which the vehicle moves without the assistance of a driver.

The invention also relates to a method of using a display device as described above in a motor vehicle. The method of use is in particular specific in that the presence of a mobile display device is detected in the motor vehicle, the proximity of the mobile display device is detected relative to the fixed information display area. and the control module is piloted to communicate information relating to the motor vehicle to the mobile display device or to the display means as a function of the result of the proximity detection in the previous step.

According to different implementation variants of the method, the control module is piloted to communicate information relating to the motor vehicle to the display means when the fixed information display area is not covered by the mobile display device , and / or the control module is piloted to communicate information relating to the vehicle only to the mobile display device when the latter is fixed to the passenger compartment of the vehicle in the covering position of the fixed information display area. As an alternative to the latter case, the control module can be controlled to communicate information relating to the vehicle only to the mobile display device when the latter is fixed to the passenger compartment of the vehicle in the position covering the display area of the vehicle. fixed information simultaneously with the mobile display device and the display means when the mobile display device is remote from the fixed information display area.

Of course, the characteristics, different variants and embodiments of the invention can be associated with one another in various combinations, insofar as they are not incompatible or mutually exclusive of each other.

The characteristics of the invention mentioned above as well as others, will appear more clearly on reading the description below which refers to the following attached drawings:

- Figure 1 is a schematic view of an information display device relating to a motor vehicle according to the invention;

Figure 2 is a schematic view of another embodiment of an information display device according to the invention;

Figure 3 is a schematic view of a motor vehicle comprising an information display device shown in Figure 2;

Figure 4 is a partial perspective representation of a passenger compartment of a motor vehicle equipped with an information display device according to the invention, in which the situation has been shown where a mobile display device is in place overlapping a display area defined on the dashboard of the vehicle;

and FIG. 5 is a representation similar to that of FIG. 4 in which the situation is shown where the mobile display device is at a distance from the display area defined on the dashboard.

As a reminder, the present invention aims to propose a new display device 5 making it possible to display information relating to the vehicle inside the passenger compartment of a motor vehicle.

FIG. 1 represents a schematic view of a first embodiment of an information display device according to the invention. According to this example, the display device 100 comprises a control module 110, display means 120 and a mobile display device 130.

The control module 110 comprises a communication unit 112 able to obtain information relating to the operation of a motor vehicle. The communication unit is also configured to transmit this information to the display means 120 as well as to the mobile display device 130. Preferably, the communication unit 112 is able to collect and transmit this information using a protocol wireless communication type "WIFI" or "Bluetooth". The control module 110 also includes detection means 114 configured to detect the presence of the mobile display device 130 in the passenger compartment of a motor vehicle. The detection means can also implement a wireless communication protocol for this purpose.

The display means 120 aim to allow the projection of information in the form of an image or a video, on a surface of the passenger compartment called the fixed information display area 121. According to the present example , the display means 120 comprise a video projector 122 preferably of small dimensions, of the picoprojector type, in order to facilitate its placement in a discreet manner in the passenger compartment of a motor vehicle. If necessary, the display means 120 may comprise one or more optical guide means 124, not shown, of the mirror or optical lens type, for modifying the position and / or the size of the image in the passenger compartment and ensuring its projection. on the fixed information display area

121.

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A mobile display device 130 according to the invention designates any mobile device capable of displaying the information transmitted by the communication unit 112 in the form of an image and / or video. Preferably, the mobile viewing device is also able to display multimedia content, allow web browsing, consultation and sending of electronic mail. Thus, a laptop computer, a digital tablet or a smartphone-type mobile phone can play the role of a mobile display device 130 according to the invention.

According to a second embodiment of the invention shown in Figure 2, the display device 100 further comprises a docking station 140 configured to hold the mobile display device 130. The docking station comprises means for detection 142 of the presence of the mobile display device 130. As an example, the detection means are arranged so as to be activated when the mobile display device 130 is held by the docking station. These detection means 142 may comprise at least one mechanical sensor and / or at least one optical sensor and / or at least one magnetic sensor. The docking station 140 also includes a communication unit 144 configured to indicate to the control module 110 whether or not the mobile display device 130 is maintained by the docking station 140. In order to allow the docking station to be fixed on an element of the passenger compartment, such as for example a glass surface or a dashboard, the docking station comprises fixing means 146. Preferably, the fixing means 146 are of reversible type so that a user can move the docking station in the passenger compartment as required. For example, the fixing means 146 may comprise at least one suction cup, at least one permanent magnet, at least one adhesive surface or any other equivalent means.

According to a particular characteristic of the invention, which will be described in more detail below, it can be provided that the fixed information display area 121 corresponds to the surface occupied on the element of the passenger compartment, in particular the board on board, by the docking station 140. In this way, it is understood that the information communicated on the fixed information display support is only visible when the docking station does not receive the mobile display device and that no information is projected onto this fixed information display medium when the mobile display device overlaps the fixed information display area 121.

FIG. 3 illustrates an exemplary arrangement of a display device 100 in the passenger compartment of a motor vehicle 200. The control module 110 is arranged in the passenger compartment 210 of the vehicle so as to allow its unit to communication 112 to connect to the on-board computer 202 of the vehicle, centralizing all the information relating to the operation of the vehicle. Of course, if necessary, this communication can be ensured by means of a dedicated cable, in the event that the on-board computer 202 is not compatible with the wireless communication protocol implemented by the communication unit. communication 112.

The detection means are placed in the passenger compartment 210 so as to allow better detection of the presence of the mobile display device and of its position relative to the fixed information display area 121. By way of example, the detection means could consist of image acquisition and processing means placed at the level of the dome light 212 or of the dashboard 214 of the passenger compartment.

According to the present example, the detection means associated with the display device comprise on the one hand detection means 114 connected to the control module 110 and on the other hand a docking station 140 integrated in the middle of the dashboard 214, between the driver's seat 216 and a passenger seat 217 located at the front of the vehicle. More specifically, the docking station comprises a housing 218 formed in the dashboard 214 and capable of receiving the mobile display device 130. The bottom of the housing comprises at least one detection means 142 as described above, connected to a communication unit 144 not shown in FIG. 3, each of these components forming part of the docking station 140 according to the invention, which can be fixed on the corresponding passenger compartment element with the housing 218 formed permanently on the dashboard for example, or mobile to be fixed in such or such position preferred by the user. The passenger compartment also includes display means 120 as mentioned above. According to the present example, the display means include a video projector 122 placed at the level of the overhead light 212 of the passenger compartment and oriented so as to illuminate the bottom of the housing 218, and which, as will be described below, is controlled to achieve this illumination as a function of the presence in overlap of the housing of the mobile display device. The bottom of the housing 218 here forms the fixed information display area 121 of the motor vehicle, and it is understood that this information display area is fixed during an information display sequence, that the bottom of the housing either permanently in this position or movable from one use to another. In the present case, a digital tablet 132 is used as a mobile display device according to the invention.

We will now describe an embodiment of the invention, starting from a situation in which the digital tablet 132 is placed in the housing 218 formed for this purpose in the dashboard 214, as is visible on FIG. 4. The control module 110, moreover automatically connected via its communication unit 112 to at least the on-board computer 202 of the vehicle and the video projector 122, is connected to the digital tablet 132 by appropriate means of communication. The presence of the digital tablet in the housing 218 is also detected by the detection means 114 of the control module 110 and the detection means 142 of the docking station 140. The control module 110 then communicates various information relating to the operation and / or moving the vehicle to the digital tablet 132 so that the driver can read this information on the mobile display device. The latter covering the fixed information display area formed on an element of the passenger compartment, and in this case the housing 218, it is therefore not necessary to configure the control module 110 so that it communicates information via the display means 120, and in particular the video projector 122, on the fixed information display area.

During the trip, it is possible that one of the occupants of the vehicle wishes to appropriate the mobile display device, both to consult information about their destination more closely than to view multimedia content unrelated to this information relating to the vehicle operation. For this, the passenger removes the digital tablet from its housing and the withdrawal of the digital tablet 132 from the docking station 140 is detected by the control module 110 using the detection means 142. This situation is particularly visible in FIG. 5 , in which we can see the fixed information display area 121 cleared and not covered by the digital tablet 132. The control module 110 then activates the video projector 122 so that it displays on the bottom of the housing 218 information previously displayed on the digital tablet. Thus, the information relating to the motor vehicle remains visible to the driver despite the fact that the tablet can no longer be viewed by the latter. It will be understood that the information projected on the bottom of the housing 218, in the fixed information display area, could be different, both in quality and in number, than that displayed beforehand on the mobile display device, without for as much to leave the context of the invention. The invention therefore allows wider use of the digital tablet, by all persons present in the passenger compartment, while preserving the safety of its occupants by allowing the driver to have access to information relating to the vehicle when the tablet is used. by a passenger.

In this particular case, it may be desired by the passenger not to see pushing vehicle information towards the tablet, which could affect the readability of the multimedia content being viewed and it is therefore possible to provide, in a variant not shown, a command, for example near the docking station, allowing the passenger to manually activate the activation of this transfer of advanced information to the tablet when the information is otherwise projected onto the bottom of the housing 218 to be visible to the driver.

Such a control button can also be useful when the vehicle is started and no mobile display device is mounted on the reception structure. Thus, as soon as the driver or passenger uses a mobile display device 130, he can, by actuating this control button, or any other equivalent control means, request activation of the transfer of information to the mobile display, while the information is projected in the fixed information display area, for example in the housing 218. The information can if necessary be communicated to a touch pad or a smart phone detected by the control module 110 The driver can in particular choose to place his phone or tablet on the docking station so that the information relating to the vehicle is displayed on a medium which is specific and familiar to him, and which is adjusted with his display preferences, or not to use it and in this case the control module controls the video projector 122 to display said information on the background of the housing 118. Advantageously, the invention therefore allows each driver to choose the support on which the information relating to the vehicle is displayed.

According to different embodiments, the information display zone can be defined on the passenger compartment, and for example on the dashboard in the center thereof, and the docking station can be arranged all around this display area, the bottom of the housing 218 then being produced by the surface of the dashboard. Or the docking station can integrate the display area formed by the bottom of the housing 218 and thus be mobile in order to offer greater freedom in the positioning of this display area.

As it has just been presented, the invention is particularly suitable for being implemented in the context of a motor vehicle 200 comprising an autonomous driving mode. When the driver is in the cockpit and concentrated on the road scene, the mobile display device 130 is advantageously fixed on the docking station so that the information relating to the vehicle is projected on the screen of this display device mobile. When the vehicle is in autonomous driving mode and the driver wishes to take the opportunity to divert his attention from the road and take time to read, or watch multimedia content, via the mobile display device, the driver detaches it. ci from the docking station and moves the mobile display device away from the information display area. The control module detects this distance from one of the display media with respect to the other, and can simultaneously send information relating to the vehicle to each of the media. The driver can choose to keep the display permanently or regularly on the mobile display device 130 when using it to relax. So regardless of the driver’s position in the cabin, the driver can monitor the vehicle in real time while diverting their attention from the road. Vehicle information remains permanently displayed in the information display area, so that other passengers in the vehicle can see this information, and so that the driver can look up and see this information in a format that it knows conventionally, the information pushed towards the mobile display device can be displayed in a reduced format so as not to interfere with the viewing of multimedia content.

Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.

Claims (15)

1. Display device (100) for information relating to a motor vehicle (200), comprising a control module (110) capable of obtaining information 5 relating to a motor vehicle and communicating them to at least one display medium, characterized in that it comprises a plurality of display media among which display means (120) capable of displaying said information on a fixed information display area (121) of the motor vehicle (200) and a mobile display device (130), the control module (110) being 10 configured to communicate said information to the mobile display device (130) and / or to the display means (120) as a function of the position of the mobile display device (130) in the passenger compartment (210). 2. Display device (100) according to the preceding claim, characterized in that the control module (110) is configured to transmit the information 15 relating to the vehicle with display means (120) in the event of detection of a position of the mobile display device (130) remote from these display means (120). 3. Display device (100) according to claim 1 or 2, characterized in that the control module (110) is configured to transmit the information 20 relating to the vehicle with the mobile display device (130) in the event that a fixed position for displaying the fixed information display area (121) is detected by the mobile display device. 4. Display device (100) according to one of the preceding claims, characterized in that it comprises a docking station (140) configured for Maintaining the mobile display device (130) in overlap or in the vicinity of the fixed information display area (121), said vehicle information being communicated to the mobile display device (130) and / or to the means of display (120) as a function of the position of the mobile display device (130) relative to the docking station (140). 5. Display device (100) according to the preceding claim, characterized in that the docking station (140) comprises detection means (142) of the maintenance of the mobile display device (130) by the docking station (140). 6. Display device (100) according to one of claims 4 or 5, characterized in 5 that the mobile display device (130) is configured to display information relating to the motor vehicle when it is detached from the docking station (140). 7. Display device (100) according to the preceding claim, characterized in that the control module (110) is configured to simultaneously display the 10 information relating to the motor vehicle on the fixed information display area (121) and on the mobile display device (130) when the latter is detached from the docking station (140). 8. Display device (100) according to the preceding claim, characterized in that the mobile display device (130) is configured to display, when it 15 is detached from the docking station (140), simultaneously at least the information relating to the vehicle and multimedia content. 9. Display device (100) according to one of the preceding claims, characterized in that the control module (110) comprises: - a communication unit (112) able to communicate to the means Display 20 (120) and to the mobile display device (130) of the information transmitted by at least one sensor of the motor vehicle (200); and - detection means (114) capable of detecting the position of the mobile display device (130) in the passenger compartment (210) of the motor vehicle 25 (200). 10. Interior (210) for a motor vehicle comprising a display device (100) according to one of the preceding claims. 11. Motor vehicle (200) comprising a passenger compartment (210) according to the preceding claim. 12. Method of using in a motor vehicle (200) a display device (100) according to one of claims 1 to 9, during which it is detected 5 the presence of a mobile display device (130) in the motor vehicle (200), the proximity of the mobile display device (130) is detected relative to the fixed information display area (121) and controls the control module (110) to communicate information relating to the motor vehicle (200) to the mobile display device (130) or to the 10 display means (120) depending on the result of the proximity detection in the previous step. 13. Method according to the preceding claim, in which the control module (110) is piloted to communicate information relating to the motor vehicle (200) to the display means (120) when the display area 15 of fixed information (121) is not covered by the mobile display device (130). 14. The method of claim 12 or 13, in which the control module is piloted to communicate information relating to the vehicle only to the mobile display device (130) when the latter is fixed on the passenger compartment. 20 of the vehicle in the covering position of the fixed information display area (121). 15. The method of claim 12 or 13, in which the control module is piloted to communicate information relating to the vehicle only to the mobile display device (130) when the latter is fixed to the passenger compartment. 25 of the vehicle in position covering the fixed information display area (121) and simultaneously with the mobile display device (130) and the display means (120) when the mobile display device (130) is at distance from the fixed information display area (121).