FR3069503A1 - INTERIOR LIGHTING SYSTEM FOR VEHICLE CAPABLE OF ADOPTING SELF-CONTAINED DRIVING AND METHOD OF CONTROLLING THE SAME - Google Patents

Abstract

According to the invention, a method of controlling an interior lighting system (12) for a vehicle (10) adapted to adopt an autonomous driving mode, comprises the steps of: a) determining a confidence level of the driving in autonomous mode, the confidence level indicating a capability of the vehicle to progress safely on a road (14) in autonomous driving mode; b) compare the confidence level to at least one determined confidence level; c) controlling the lighting system (12) according to the result of step b) so as to inform the passenger (s) of the vehicle (10) the level of confidence in progress.

Description

TECHNICAL AREA

The present invention relates to a lighting system for a vehicle capable of adopting autonomous driving and more particularly to its control method making it possible to inform a passenger of the vehicle of the confidence level of the autonomous driving mode.

TECHNOLOGICAL BACKGROUND OF THE INVENTION

Autonomous vehicles are vehicles capable of adopting an autonomous driving mode, in particular by using traffic information provided by sensors enabling it to progress on a road. When the sensors have faults, or when the traffic information is corrupted, or quite simply when the road conditions no longer allow the autonomous vehicle to be able to circulate safely on the road network, the vehicle must inform the passenger of the vehicle in order to be able to remedy the situation.

The multiple diagnostic and feedback systems in an autonomous vehicle are generally complex and do not allow the driver or passenger to make a quick and efficient decision to overcome a situation where the autonomous vehicle is unable to progress safely. on the road.

It is therefore important to offer a new solution to these problems.

SUMMARY OF THE INVENTION

According to a first embodiment, a method of controlling an interior lighting system for a vehicle capable of adopting an autonomous driving mode comprises the steps of:

a) determining a level of confidence in driving in autonomous mode, the confidence level indicating an ability of the vehicle to progress safely on a road in autonomous driving mode;

b) comparing the level of confidence with at least one determined confidence threshold;

c) control the lighting system according to the result of step b) so as to inform the passenger or passengers of the vehicle of the current level of confidence.

More particularly, step c) may include steps of:

cl) controlling the lighting system to produce a light beam of a first color if the confidence level is greater than the determined confidence threshold informing the passenger of the vehicle of the absence of an event affecting the ability of the vehicle to progress in safe on the road;

c2) controlling the lighting system to produce a light beam of a second color if the confidence level is below the determined confidence threshold informing the passenger of the vehicle of the presence of an event altering the vehicle's ability to progress in safe on the road.

Optionally, step c) can also include a step of:

c3) controlling the lighting system to produce a light beam of a third color if the confidence level is between a moderate confidence threshold and a high confidence threshold informing the passenger of the vehicle of the presence of an event which may impair the vehicle's ability to progress safely on the road.

The control method can also include a step of:

d) control the lighting system to flash the light beam if the confidence level is below the determined confidence threshold.

The control method can also include a step of:

e) deliver a message inviting the passenger to take action on the vehicle 10 if the confidence level (NC) is below the determined confidence threshold (SC).

In a particular embodiment, for which the lighting system comprises a plurality of light strips arranged in several zones distinct from the periphery of the passenger compartment of the vehicle, the zones distinct from the periphery of the passenger compartment corresponding to several zones distinct from the vehicle environment; step a) of the control method may include step al) of determining the level of confidence for each separate area of the vehicle environment.

In addition, according to this particular embodiment, step b) of the control method can include step b4) consisting in controlling the light strip arranged in the area around the passenger compartment corresponding to the area separate from the environment in which the confidence level is below the confidence threshold determined to produce a light beam of a color distinct from the other light strips so as to inform the passenger of the vehicle about the location of the distinct area of the environment of the vehicle for which the confidence level for driving in autonomous mode is below the high confidence threshold.

Also, according to this particular embodiment, the control method can include the step of:

f) control the lighting system to flash the said light strip arranged in the area around the passenger compartment corresponding to the separate area of the environment according to which the level of confidence is below the determined confidence threshold.

According to the invention, an interior lighting system for a vehicle capable of adopting an autonomous driving mode comprises a control device configured to determine a confidence level of driving in autonomous mode, the confidence level indicating an ability of the vehicle to progress safely on a road in autonomous driving mode. The control device is configured to control a plurality of light strips to produce light beams of a color determined according to the level of confidence of driving in autonomous mode so as to inform the passenger or passengers of the vehicle of the level of confidence in Classes.

According to the invention, a vehicle capable of adopting autonomous driving comprises a device for monitoring the environment of the vehicle, a control computer for driving in autonomous mode connected to the monitoring device; the autonomous mode driving control computer comprising a control device configured to determine a confidence level of the autonomous mode driving and to control a plurality of light strips to produce light beams of a color determined according to the level driving confidence in autonomous mode so as to inform the passenger or passengers of the vehicle of the current level of confidence.

BRIEF DESCRIPTION OF THE DRAWINGS

Other characteristics, objects and advantages of the invention will appear on reading the detailed description which follows, and with reference to the appended drawings, given by way of non-limiting example and in which:

Figure 1 is a schematic representation of a vehicle capable of adopting an autonomous driving mode equipped with the lighting device according to a first embodiment of the invention;

Figure 2 is a schematic representation of the vehicle of Figure 1 in a situation where the vehicle is unable to progress safely in autonomous driving mode.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

According to Figure 1, a vehicle 10 capable of adopting autonomous driving is shown traveling on a road 14 in forward direction in a direction D along a longitudinal axis L.

The vehicle 10 includes an interior lighting system 12 which can be part of an ambient lighting system.

The lighting system 12 comprises a control device 16 making it possible in particular to control the colors of the light beams 19, 21, 23, 25, 27, 29, 31, 33 of a plurality of light strips 18, 20, 22, 24 , 26, 28, 30, 32. The color of a light beam 31 can vary depending on the control of the control device 16. The control device 16 is generally an electronic sub-assembly embedded in a driving control computer in mode autonomous 17. In particular, the control device 16 could be an independent electronic module. Without limitation, the control device 16 acts as an intelligent switch making it possible to switch on, off, flash, and also to choose the color of the light beams 19, 21, 23, 25, 27, 29, 31, 33 of the plurality of light strips 18, 20, 22, 24, 26, 28, 30, 32.

The lighting system 12 comprises a device 34 for monitoring the environment of the vehicle 10 making it possible in particular to monitor the road conditions under which the vehicle 10 is progressing. The monitoring device 34 is obviously not exclusively dedicated to the lighting system 12. The monitoring system 34 is generally dedicated to the autonomous driving mode. The monitoring system 34 plays a major role, for example, in controlling the speed of the vehicle 10 and in the trajectory of the vehicle 10.

In a nonlimiting manner, the surveillance device 34 can comprise, individually or in combination with one another, one or more radar devices, one or more cameras, a location device such as a satellite geo-positioning device. (GPS) or a communication device between the vehicle 10 and the infrastructure of the road network (V2I). The monitoring device 34 also makes it possible to share the environment of the vehicle 10 under surveillance in several distinct zones. As illustrated in FIG. 1, and in a nonlimiting manner, the environment of the vehicle 10 is divided into eight distinct zones under surveillance: the front zone ZAV of the vehicle 10, the front left zone ZAVG of the vehicle 10, the lateral zone left ZLG of vehicle 10, rear left zone ZARG of vehicle, rear zone ZAR of vehicle 10, right rear zone ZARD of vehicle 10, right side zone ZLD of vehicle 10 and right front zone ZAVD of vehicle 10.

The autonomous driving control computer 17 is connected to the monitoring device 34, allowing the checking device 16 to determine the capacity of the vehicle 10 to progress safely on the road 14 in autonomous driving mode. The ability of the vehicle 10 to progress safely on the road 14 in autonomous driving mode is classified by the control device 16 according to a confidence level NC of driving in autonomous mode. The ability of the vehicle 10 to progress safely on the road 14, that is to say the confidence level NC of driving in autonomous mode, can also be evaluated for each separate zone under surveillance ZAV, ZAVG, ZLG, ZARG, ZAR, ZARD, ZLD, ZAVD so as to allow a location of the presence of an event altering the ability of vehicle 10 to progress safely on route 14.

In other words, a level of confidence before NCAV can be assigned to the area before ZAV, a level of confidence before left NCAVG can be assigned to the area before left ZAVG, a level of confidence left lateral NCLG can be assigned to the left side area ZALG, a rear left confidence level NCARG can be assigned to the rear left zone ZARG, a rear confidence level NCAR can be assigned to the rear zone ZAR, a rear right confidence level NCARD can be assigned to the right rear zone ZARD , a right lateral confidence level NCLD can be assigned to the right lateral zone ZLD and finally a right front confidence level NCAVD can be assigned to the right front zone ZAVD.

Each confidence level NCAV, NCAVG, NCLG, NCARG, NCAR, NCARD, NCLD, NCAVD evaluated will also depend on the trajectory of the vehicle 10. For example and without limitation, any event occurring in the rear zone under ZAR surveillance and in no way preventing the vehicle 10 from advancing on the road 14 in forward direction in direction D in autonomous driving mode, can result in a high level of confidence NCAR for said rear zone under ZAR surveillance.

The plurality of light strips 18, 20, 22, 24, 26, 28, 30, 32 is arranged in several distinct zones around the periphery 48 of the passenger compartment of the vehicle 10, the distinct zones of the circumference 48 of the passenger compartment corresponding to the zones separate under surveillance ZAV, ZAVG, ZLG, ZARG, ZAR, ZARD, ZLD, ZAVD of the environment of the vehicle 10. By way of example and without limitation, according to FIG. 1, a front light strip 18 is arranged transversely on the dashboard 36, the front light strip 18 corresponding to the front zone under ZAV surveillance. A right front strip 32, corresponding to the right front zone under ZAVD surveillance, comprises a first portion arranged at the right front end of the dashboard 36 and a second portion arranged approximately on the inner rim of the right front door 38, that is to say at the junction between the right front door 38 and the bottom of its window. A right lateral strip 30, corresponding to the right lateral zone under ZLD surveillance, is arranged in part on the inner rim of the right front door 38. The other part is arranged on the inner rim of the right rear door 40. The strip right side 30 is therefore split into two parts, in no way hindering the opening of the doors 38, 40. A right rear strip 28, corresponding to the rear right zone under ZARD surveillance, comprises a portion arranged approximately on the inner rim of the rear right door 40 and another portion arranged approximately at the rear right end of the rear shelf 42 of the vehicle 10. The right rear strip 28 is therefore split into two portions, in no way hindering the opening of the right rear door 40 A rear strip 26 is arranged transversely on the rear shelf 42, the rear light strip 26 corresponding to the rear zone under surveillance. llance ZAR. A left rear strip 24 corresponding to the rear left zone under ZARG surveillance, comprises a portion arranged approximately at the rear left end of the rear shelf 42 of the vehicle 10 and another portion arranged approximately on the inner rim of the left rear door 44 of the vehicle 10. The left rear strip 24 is therefore split into two portions, in no way hindering the opening of the left rear door 44. A left lateral strip 22, corresponding to the left lateral zone under ZLG surveillance, is arranged in part on the inside edge of the left rear door 44. The other part is arranged on the inside edge of the left front door 46. The left side strip 22 is therefore split into two parts, in no way hindering the opening of the doors 44 , 46. A front left strip 20, corresponding to the front left zone under ZAVG surveillance, comprises a first portion arranged approx. approximately on the inside edge of the left front door 46 and a second portion arranged at the left front end of the dashboard 36.

Preferably, the light strips 18, 20, 22, 24, 26, 28, 30, 32 are arranged aligned one after the other so as to cover the entire periphery 48 of the passenger compartment.

The invention is not limited to this type of arrangement of light strips 18, 20, 22, 24, 26, 28, 30, 32 in the passenger compartment of the vehicle 10. Other arrangements are possible. We will cite for example the possibility of arranging light strips on the amounts of the vehicle 10 commonly called amount-A, amount-B, amount-C or, according to the Anglo-Saxon terms "A pillar, B-pillar, C- pillar ”. The amounts of the vehicle can also correspond to distinct zones under surveillance of the environment of the vehicle

10.

The invention resides in particular in the fact of associating the confidence level NC with the color of the light beams 19, 21, 23, 25, 27, 29, 31, 33 of the plurality of light strips 18, 20, 22, 24, 26, 28, 30, 32. The light strips 18, 20, 22, 24, 26, 28, 30, 32 therefore have an informative role in that they allow a passenger of vehicle 10 to have a status on the level NC confidence in autonomous driving, that is to say on the ability of vehicle 10 to progress safely on a road 14 in autonomous driving mode.

The control device 16 therefore makes it possible to control the lighting system 12 to produce a light beam 19 of a color determined as a function of the confidence level NC of autonomous driving so as to inform the passenger or passengers of the vehicle 10 of the level NC confidence in progress. By way of example and without limitation, the light strips 18, 20, 22, 24, 26, 28, 30, 32 may comprise a plurality of light-emitting diodes of the 'red green blue' type so that the color of the light beams 19, 21, 23, 25, 27, 29, 31, 33 can be configured in a multitude of different shades depending on the control signal which is applied to the light strips 18, 20, 22, 24, 26, 28, 30, 32 .

When the confidence level NC is greater than or equal to a determined confidence threshold SC, a first color, for example the color green, is assigned to the light beams 19, 21, 23, 25, 27, 29, 31, 33 of the bands bright 18, 20, 22, 24, 26, 28, 30, 32. A confidence level greater than or equal to the determined confidence threshold SC signifies an absence of event altering the ability of vehicle 10 to progress safely on the road 14. In other words this means that the road conditions, that is to say the direct environment of the vehicle 10 defined by the separate zones under surveillance ZAV, ZAVG, ZLG, ZARG, ZAR, ZARD, ZLD, ZAVD , does not contain events for which driving in autonomous mode would not act safely.

By way of nonlimiting example, a road infrastructure compatible with the autonomous driving mode, comprising obstacles recognized by the autonomous vehicle 10, such as other vehicles or also pedestrians, should in no way impair the capacity of the vehicle 10 to progress safely in autonomous driving.

On the other hand, when the confidence level NC is less than a determined confidence threshold SC, a second color, for example the color red, is assigned to the light beams 19, 21, 23, 25, 27, 29, 31, 33 of the light strips 18, 20, 22, 24, 26, 28, 30, 32. A confidence level NC below the determined confidence threshold SC signifies the presence of an event altering the ability of the vehicle 10 to progress safely on the route 14.

Preferably, this situation is an invitation to the passenger to carry out an action on the vehicle 10 so that they can continue to progress in complete safety. It is possible for example, without limitation, to provide a display device 50 in the vehicle 10 on which a message inviting the passenger to carry out an action on the vehicle 10 such as adopting manual driving of the vehicle 10 or program a different route is displayed.

By way of nonlimiting example, a road infrastructure not compatible with the autonomous driving mode of the vehicle 10, that is to say for example, a road 14 having no signal recognized by the autonomous vehicle 10 as a dirt road (no white lines, no signposts), could lead to the inability of vehicle 10 to progress safely in autonomous driving mode. The inability of the vehicle 10 to progress in complete safety in autonomous driving mode could also result from the failure of a detection member of the device 34 for monitoring road conditions, such as for example a radar or even a camera.

Optionally, the determined confidence threshold SC can be replaced by two thresholds, that is to say a high confidence threshold SCE and a moderate confidence threshold SCM. A level of confidence NC greater than or equal to the high confidence threshold SCE signifies an absence of event altering the ability of the vehicle 10 to progress safely on the road 14. A level of confidence NC less than or equal to a moderate confidence threshold SCM signifies the presence of an event altering the ability of vehicle 10 to progress safely on route 14.

When the confidence level NC is between the moderate confidence threshold SCM and the high confidence threshold SCE, a third color, for example the color orange, is assigned to the light beams 19, 21, 23, 25, 27, 29, 31, 33. A confidence level NC comprised between the moderate confidence threshold SCM and the high confidence threshold SCE signifies the presence of an event which can alter the ability of the vehicle 10 to progress safely on the road 14.

Preferably, this situation is an invitation to the passenger to be vigilant and therefore to be ready to carry out an action on the vehicle 10 so that they can continue to progress in complete safety. It is possible, for example, without limitation, to provide that the display device 50 of the vehicle 10 displays a message inviting the passenger to be possibly ready to adopt a manual driving mode of the vehicle 10 or to program a different route.

This confidence level NC, called the intermediate confidence level NCi, is generally a transient confidence level. In other words, this intermediate confidence level NCi can be used, without limitation, to invite the passenger of the vehicle 10 to carry out a manual operation, such as a change of route, in order to prevent the autonomous vehicle 10 from tipping over. below the SCM moderate confidence level.

Optionally, the control device 16 can control the light strips 18, 20, 22, 24, 26, 28, 30, 32 to flash the light beams 19, 21, 23, 25, 27, 29, 31, 33 if the confidence level is below the determined confidence threshold SC. The flashing speed can also be established by the control device 16 so as to adapt it according to the confidence level NC.

The invention also resides in the possibility of informing the passenger about the location of an event altering the ability of vehicle 10 to progress safely on route 14.

The capacity of the vehicle 10 to progress in complete safety can also be evaluated for each separate zone under surveillance ZAV, ZAVG, ZLG, ZARG, ZAR, ZARD, ZLD, ZAVD, the control device 16 can control the light strip 18 arranged in the area of the periphery 48 of the passenger compartment corresponding to the distinct area under surveillance ZAV according to which the confidence level NCAV is less than the determined confidence threshold SC to produce a light beam 19 of a color distinct from the other light strips 20, 22, 24, 26, 28, 30, 32 so as to inform the passenger of the vehicle 10 about the location of the area under surveillance Z AV of the environment of the vehicle 10 for which the confidence level NC AV of the autonomous driving is lower than the determined confidence level SC.

Optionally, the control device 16 can control the light strip 18 corresponding to the zone under surveillance Z AV for which the confidence level NCAV is less than the determined confidence threshold SC to cause the light beams 19 of said strip 18 to flash. zone under ZAV surveillance for which an event altering or possibly altering the autonomous driving mode has been detected. Also, the flashing speed can vary depending on the confidence threshold.

According to FIG. 2, a concrete example illustrating a situation for which the vehicle 10 is no longer able to progress on the road 10 in complete safety in autonomous driving mode is shown. The vehicle runs in forward direction in a predetermined direction D. According to this nonlimiting example, an unforeseen fact, such as a rock fall, left on the road 14 on which the vehicle 10 is moving a pile of stones 52. The monitoring device 34 detects in the front left area AVG of the environment of the vehicle under surveillance an abnormal event, that is to say the accumulation of stones 52. The accumulation of stones 52 being so important that the vehicle 10 is unable to avoid the accumulation of stone 52 without leaving the markings recognized by the vehicle 10 and formed by the two curbs 54, 56 of the road 14. The control device 16 therefore assesses the situation as an inability of the vehicle 10 to progress safely in driving mode autonomous on this route. The event altering the ability of vehicle 10 to progress safely on the road being detected in the front left zone ZAVG of vehicle 10, the control device 16 will therefore assign to this zone a level of confidence before left NCAVG below the threshold trusted SC. Consequently, the control device 16 will control the light strips 18, 22, 24, 26, 28, 30, 32 separate from the front left light strip 20 so that they produce light beams 19, 23, 25, 27, 29 , 31, 33 of red color, while the front left light strip 18 can for example be controlled so as to produce a light beam 19 of blue color which can flash.

It is then possible to provide that the passenger compartment of the vehicle is equipped with a display 50 delivering a message inviting a passenger to change the predetermined route by authorizing the vehicle 10 to make a U-turn, or to invite the passenger to adopt manual driving if the vehicle 10 can safely exit the road 14 markings so as to avoid the accumulation of stones 52.

According to one embodiment of the invention, a method for controlling the interior lighting system 12 for the vehicle 10 capable of adopting an autonomous driving mode, comprises a step of determining a confidence level NC of the autonomous driving , the confidence level NC indicating an ability of the vehicle 10 to progress safely on a road in autonomous driving mode.

In order to inform the passenger of the autonomous vehicle 10 of the confidence level NC in progress, a step of controlling the lighting system 12 as a function of a comparison between the determined confidence level NC and a determined confidence threshold SC is carried out .

In particular, the control step may include a step of controlling the lighting system 12 making it possible to produce a light beam 19 of a first color if the confidence level NC is greater than a determined confidence threshold SC informing the passenger of the vehicle 10 of the absence of event altering the ability of vehicle 10 to progress safely on road 14, and a step of controlling the lighting system 12 to produce a light beam 19 of a second color if the level confidence level NC is below the determined confidence level SC informing the passenger of vehicle 10 of the presence of an event altering the ability of vehicle 10 to progress safely on road 14.

Optionally and in order to anticipate the situation in which the vehicle 10 is unable to progress safely on the road 14, the determined confidence threshold SC is replaced by a moderate confidence threshold SCM and a high confidence threshold SCE. so that when the confidence level NC is between the moderate confidence threshold SCM and the high confidence threshold SCE, a step consists in controlling the lighting system 12 to produce a light beam 21 of a third color informing the passenger of vehicle 10 from the presence of an event which could affect the ability of vehicle 10 to progress safely on road 14.

In order to best attract the attention of the passenger when the confidence level NC of driving in autonomous mode becomes lower than the determined confidence threshold SC, that is to say when the vehicle 10 detects the presence of an event altering the ability of the vehicle 10 to progress safely on the road 14, a step consists in flashing the light beam 21. This flashing can be continuous as long as the confidence level NC is lower than the high confidence threshold SCE. This flashing can also be limited in time, i.e. last a few seconds or a few minutes.

The flashing speed can also be adjusted according to the determined confidence level NC.

It is also conceivable to include a step consisting in delivering a message inviting the passenger to take action on the vehicle 10 if the confidence level NC is below the determined confidence threshold SC.

When the lighting system 12 comprises a plurality of light strips 18, 20, 22, 24, 26, 28, 30, 32 arranged in several distinct zones around the periphery 48 of the passenger compartment of the vehicle 10, the distinct zones around the circumference 48 of the passenger compartment corresponding to several distinct zones under surveillance ZAV, ZAVG, ZLG, ZARG, ZAR, ZARD, ZLD, ZAVD of the environment of the vehicle 10, and in order to inform the passenger of the vehicle 10 of the location of a area under ZAVG surveillance of the vehicle environment 10 for which the control device 16 coupled to the surveillance device 34 has identified an event which may alter or alter the ability of vehicle 10 to progress safely on road 14, the method can comprise a step of determining the level of confidence NCAVG for each separate zone ZAVG for monitoring the environment of the vehicle 10.

The method may also include a step consisting in controlling the light strip 20 arranged in the area around the periphery 48 of the passenger compartment corresponding to the separate area under ZAVG surveillance for which the confidence level NCAVG is below the determined confidence threshold SC.

The command may consist in producing a light beam 21 of a color distinct from the other light strips 18, 22, 24, 26, 28, 30, 32 so as to inform the passenger of the vehicle 10 on the location of said zone under ZAVG surveillance. .

It is possible to add a step consisting in flashing the light strip 21 arranged in the area of the periphery 48 of the passenger compartment corresponding to the separate area under ZAVG surveillance according to which the confidence level NCAVG is below the determined confidence threshold SC .

Claims (10)

1. Method for controlling an interior lighting system (12) for a vehicle (10) capable of adopting an autonomous driving mode, comprising the steps of: a) determining a confidence level (NC) of driving in autonomous mode, the confidence level (NC) indicating an ability of the vehicle (10) to progress safely on a road (14) in autonomous driving mode; b) comparing the confidence level (NC) with at least one determined confidence threshold (SC); c) control the lighting system (12) according to the result of step b) so as to inform the passenger or passengers of the vehicle (10) of the current confidence level (NC). 2. Control method according to the preceding claim in which step c) comprises the steps of: cl) controlling the lighting system (12) to produce a light beam (21) of a first color if the confidence level (NC) is greater than the determined confidence threshold (SC) informing the passenger of the vehicle (10) the absence of an event (52) altering the ability of the vehicle (10) to progress safely on the road (14); c2) controlling the lighting system (12) to produce a light beam (21) of a second color if the confidence level (NC) is below the determined confidence threshold (SC) informing the passenger of the vehicle (10) the presence of an event (52) altering the ability of the vehicle (10) to progress safely on the road (14). 3. Control method according to claim 2 in which step c) comprises the step of: c3) controlling the lighting system (12) to produce a light beam (21) of a third color if the confidence level (NC) is between a moderate confidence threshold (SCM) and a high confidence threshold ( SCE) informing the passenger of the vehicle (10) of the presence of an event (52) which may alter the ability of the vehicle (10) to progress safely on the road (14). 4. Control method according to any one of the preceding claims, in which the method also comprises a step of: d) control the lighting system (12) to flash the light beam (21) if the confidence level (NC) is below the determined confidence threshold (SC). 5. Control method according to any one of the preceding claims, in which the method also comprises a step of: e) deliver a message inviting the passenger to take action on the vehicle 10 if the confidence level (NC) is below the determined confidence threshold (SC). 6. Control method according to any one of the preceding claims, characterized in that: the lighting system (12) comprises a plurality of light strips (18, 20, 22, 24, 26, 28, 30, 32) arranged in several distinct zones around the periphery (48) of the passenger compartment of the vehicle (10) , the distinct zones of the periphery (48) of the passenger compartment corresponding to several distinct zones (ZAV, ZAVG, ZLG, ZARG, ZAR, ZARD, ZLD, ZAVD) of the environment of the vehicle (10); step a) includes step al) determining the level of confidence (NCAV, NCAVG, NCLG, NCARG, NCAR, NCARD, NCLD, NCAVD) for each separate zone (ZAV, ZAVG, ZLG, ZARG, ZAR, ZARD , ZLD, ZAVD) of the vehicle environment (10); 7. Control method according to claim 6 characterized in that: step b) comprises step b4) consisting in controlling the light strip (20) arranged in the area of the periphery (48) of the passenger compartment corresponding to the distinct zone (ZAVG) of the environment according to which the confidence level (NCAVG) is below the determined confidence threshold (SC) to produce a light beam (21) of a color distinct from the other light bands (18, 22, 24, 26, 28, 30, 32) so as to inform the vehicle passenger (10) about the location of the separate zone (ZAVG) of the vehicle environment for which the confidence level (NCAVG) of the driving in autonomous mode is below the high confidence threshold (SCE). 8. Control method according to any one of claims 6 and 7 comprising the step of: f) controlling the lighting system (12) to make the said light strip (20) flashing arranged in the area around (48) of the passenger compartment corresponding to the distinct area (ZAVG) of the environment according to which the level confidence level (NCAVG) is below the determined confidence level (SC). 9. Interior lighting system (12) for a vehicle (10) capable of adopting an autonomous driving mode comprising: a control device (16) configured to determine a confidence level (NC) of driving in autonomous mode, the confidence level (NC) indicating an ability of the vehicle (10) to progress safely on a road (14) in autonomous driving mode; characterized in that the control device (16) is configured to control a plurality of light strips (18, 22, 24, 26, 28, 30, 32) to produce light beams (19, 21, 23, 25, 27 , 29, 31, 33) of a color determined as a function of the level of confidence (NC) of driving in autonomous mode so as to inform the passenger or passengers of the vehicle (10) of the level of confidence (NC) in progress. 10. Vehicle (10) capable of adopting an autonomous driving mode comprising: a vehicle environment monitoring device (34) (10); a driving control computer in autonomous mode (17) connected to the monitoring device (34); characterized in that the control computer for driving in autonomous mode (17) comprises a control device (16) configured to determine a confidence level (NC) of driving in autonomous mode and for controlling a plurality of light strips ( 18, 22, 24, 26, 28, 30, 32) to produce light beams (19, 21, 23, 25, 27, 29, 31, 33) of a color determined according to the level of confidence (NC) driving in autonomous mode so as to inform the passenger or passengers of the vehicle (10) of the current confidence level 5 (NC).