ANTI-MORNING SICKNESS DEVICE FITTING A MOTOR VEHICLE, MOTOR VEHICLE EQUIPPED WITH THIS DEVICE AND METHOD OF DISPLAYING LIGHT MARKERS INTENDED TO COMBAT MORNING SICKNESS

Abstract

ANTI-MOTION DEVICE EQUIPPING A MOTOR VEHICLE, MOTOR VEHICLE EQUIPPED THEREOF AND METHOD OF DISPLAYING LIGHT MARKERS INTENDED TO COMBAT MOTION SICKNESS. The invention relates to an anti-motion device equipping a motor vehicle (10), characterized in that the anti-motion device comprises: - a triaxial accelerometer configured to detect the accelerations of the vehicle (10) along 3 axes and emit a corresponding acceleration signal; - display means (12, 12', 12") of luminous markers capable of forming at least one first artificial horizon line (14, 14') at the level of a first interior surface (13) of the motor vehicle and at least one second artificial horizon line (16, 16') at the level of a second interior surface (15, 15') of the motor vehicle, the said first and second artificial horizon lines (14, 16; 14', 16') being perpendicular or substantially perpendicular to each other;- a control unit capable of receiving the acceleration signals emitted by the accelerometer and controlling the display means (12, 12', 12") in such a way that the first and second artificial horizon lines (14, 16; 14', 16') are aligned in a horizontal plane (A), perpendicular or substantially perpendicular to the gravity vector, whatever the accelerations of the vehicle, the control unit being, on the other hand, configured to process said acceleration signals, before controlling the display means (12, 12', 12"), in order to determine in real time an acceleration frequency along each of the accelerometer axes and to control said display means (12, 12', 12") only when said acceleration frequency is lower than a threshold frequency below which motion sickness is likely to occur.

Description

1 / 13 ANTI-MORNING SICKNESS DEVICE FITTING A MOTOR VEHICLE, MOTOR VEHICLE EQUIPPED WITH THIS DEVICE AND METHOD OF DISPLAYING LIGHT MARKERS INTENDED TO COMBAT MORNING SICKNESS

[001] The invention relates to a device intended to combat motion sickness integrated into a motor vehicle and to a motor vehicle equipped with said device.

[002] A problem commonly encountered by people traveling in a vehicle, airplane, or boat is motion sickness, also called kinetosis. Motion sickness is due to a difference between the sensations felt in the vestibular system of the inner ear and those experienced by other senses, such as a person's visual perceptions. The balance receptors in the inner ear are sensitive to gravity (e.g., changes in orientation), speed, and changes in velocity (accelerations) that occur during vehicle movement. When the sensations felt by the inner ear do not correspond to the visual signals perceived by the person, it often results in motion sickness, manifesting notably as nausea and headache.

[003] For example, a passenger traveling on a winding road in a car is subjected to linear and angular accelerations each time the vehicle moves through a curve. The vestibular detection system's response to the acceleration caused by the vehicle's movement will not correspond to visual perception unless the person continuously looks at the road, so that the perception of their inner ear matches the visually perceived trajectory of the vehicle in the curves. This is why the driver of a vehicle generally does not suffer from motion sickness, while passengers in the vehicle may suffer from it. In fact, the driver constantly monitors the road and visually perceives the vehicle's movement, so visual perceptions Petition 870220064377, dated 07 / 21 / 2022, p. 8 / 23 2 / 13 correspond to the senses of the inner ear. On the other hand, passengers in a vehicle who are only reading or looking inside the vehicle, or who are engaged in other activities that prevent them from monitoring the road, will have a visual perception that does not correspond to that of the inner ear.

[004] To avoid motion sickness, one solution is for the passenger to monitor the road as if driving the vehicle, so that the visual information they receive corresponds more closely to the sensations of their vestibular system. However, when seated in the back of the vehicle, they generally see the road only partially. The passenger's actual movement, as perceived by the inner auditory apparatus of the vestibular ear, cannot therefore be easily associated with the visual perception of that movement. Motion sickness cannot, therefore, be avoided in this case.

[005] Another solution for motion sickness, described in document US 2019 / 0083739, consists of using luminous markers on the interior uprights of a vehicle's passenger compartment, said luminous markers forming luminous columns on each side of the passenger compartment. The height of the luminous columns is controlled by electronic means in order to create an artificial horizon corresponding to the perception of the inner ear of a passenger seated in the vehicle. However, this solution has the drawback of displaying the luminous markers independently of the vehicle's movement. Thus, in this known solution, an artificial horizon is constantly displayed in the passenger compartment. However, it is scientifically proven that motion sickness only occurs within a very specific acceleration frequency range. In particular, the first warning symptoms of motion sickness generally occur at acceleration frequencies below 25 Hz.The first 15 signs of discomfort in passengers only truly manifest themselves in the acceleration frequency ranges between 4 and 8 Hz. However, motion sickness only becomes truly uncomfortable for passengers when accelerations occur in the front-to-rear or left-to-right direction. Petition 870220064377, dated 07 / 21 / 2022, page 9 / 23 3 / 13 vehicles have a frequency lower than 0.5 Hz or in cases where accelerations in the vertical direction have a frequency lower than 2 Hz. As a result, the solution described in document US 2019 / 0083739 has the drawback of displaying warning lights inside the vehicle even when the risk of motion sickness is negligible or nearly negligible. This premature display can then disturb passengers if they are not yet experiencing motion sickness. Furthermore, the continuous use of light sources for displaying warning lights generates excessive electrical energy consumption which, particularly in the case of an electric vehicle, for example, can have a significant impact on the vehicle's range.

[006] The invention aims, therefore, to propose a device designed to combat motion sickness that is integrated into a motor vehicle and does not present the disadvantages of the aforementioned prior art.

[007] To that end, the invention relates to an anti-motion sickness device fitting a motor vehicle, the anti-motion sickness device comprising: - a triaxial accelerometer configured to detect vehicle accelerations along 3 axes and to emit a corresponding acceleration signal; - means of displaying luminous markers capable of forming at least one first artificial horizon line at the level of a first interior surface of the motor vehicle and at least one second artificial horizon line at the level of a second interior surface of the motor vehicle, said first and second artificial horizon lines being perpendicular or substantially perpendicular to each other; - a control unit capable of receiving acceleration signals emitted by the accelerometer and controlling said display means in such a way that the first and second artificial horizon lines are aligned in a horizontal plane, perpendicular or substantially... Petition 870220064377, dated 07 / 21 / 2022, page 10 / 23 4 / 13 perpendicular to the gravity vector, whatever the vehicle accelerations, the control unit being, moreover, configured to process said acceleration signals, previously under the control of the display means, in order to determine, in real time, an acceleration frequency along each of the accelerometer axes and to control said display means only when said acceleration frequency is lower than a threshold frequency below which motion sickness is likely to occur.

[008] Thus configured, the motion sickness device of the invention allows the elimination of nausea by displaying two artificial horizon lines, respectively one in front of a person seated in the vehicle and the other to the side of said person, said lines being aligned in a horizontal plane. The device also allows the display of luminous markers only for the acceleration frequency ranges in which the risk of motion sickness is high. [ 009] The device of the invention may also comprise one or more of the following features: The limiting frequency is equal to 25 Hz. - The limit frequency is between 4 and 8 Hz. - The limit frequency is equal to 0.5 Hz for accelerations along a longitudinal axis, corresponding to the front-to-rear direction of the vehicle, and along a lateral axis, corresponding to the right-to-left direction of the vehicle, and is equal to 2 Hz for accelerations along a vertical axis, corresponding to the high-to-low direction of the vehicle. - The display means are capable of emitting at least two straight light beams, respectively a first light beam projected onto the first interior surface and forming the first artificial horizon line, and a second light beam projected onto the second interior surface and forming the second artificial horizon line. Petition 870220064377, dated 07 / 21 / 2022, p. 11 / 23 5 / 13 - the display means comprise at least one light source emitting a main light beam and means for separating and diverting said main light beam into two secondary light beams. - The separation and diversion means comprise a prism designed to separate the light beam into two secondary light beams and a combination of mirrors and / or lenses designed to modify the trajectory of said secondary light beams. - the display means comprise at least one pair of light sources, respectively a first light source that emits the first light beam and a second light source that emits the second light beam. - the light source, or rather the pair of light sources, is a laser, or rather a pair of lasers. - the display means comprise at least three vertically oriented light columns, respectively a first light column arranged in alignment with the first interior surface and in alignment with the second interior surface, a second light column arranged in alignment with the second interior surface and to the left or right of the first light column, and a third light column arranged in alignment with the first interior surface and closer to the rear of the vehicle than the first light column, each of the light columns being formed by a plurality of vertically aligned light points, each of the light points being able to emit light in an activated state and not emit light in a deactivated state,where the first artificial horizon line is formed by the virtual straight line passing through the highest or lowest activated light points in the first and third light columns respectively, and the second artificial horizon line is formed by the virtual straight line passing through the highest or lowest activated light points in the first and second light columns respectively. Petition 870220064377, dated 07 / 21 / 2022, page 12 / 23 6 / 13 Each of the light columns comprises a linear network of vertically aligned light-emitting diodes, each diode forming a luminous point. [ 010] The invention also relates to a motor vehicle equipped with the motion sickness device, as defined above. [ 011] In a particular embodiment of the invention, the vehicle comprises at least one central mount, said central mount supporting the display means, said display means being configured to project the first light beam onto a rear side window or rear door panel of the vehicle and to project the second light beam onto an interior surface of the passenger compartment arranged substantially perpendicular to said window or said door panel, for example, the backrest of one of the front seats of the vehicle. [ 012] The invention also relates to a method for displaying luminous markers intended to combat motion sickness, comprising the following steps: - detection by means of a triaxial accelerometer of the accelerations of a vehicle along 3 axes and sending corresponding signals to a control unit; - real-time determination of an acceleration frequency along each of the accelerometer axes and comparison between the determined acceleration frequency and a threshold frequency below which motion sickness is likely to occur; - in the event that the determined acceleration frequency is lower than the limit frequency, control by the control unit of means of displaying luminous markers capable of forming at least one first artificial horizon line at the level of a first interior surface of the motor vehicle and at least one second artificial horizon line at the level of a second interior surface of the motor vehicle, said first and second artificial horizon lines being perpendicular or Petition 870220064377, dated 07 / 21 / 2022, page 13 / 23 7 / 13 substantially perpendicular to each other, so that the first and second artificial horizon lines are aligned in a horizontal plane, perpendicular to the gravity vector, regardless of the vehicle's accelerations.

[013] Other features and advantages will clearly emerge from the description below of two particular embodiments of the invention, given as non-limiting examples, with reference to the accompanying drawings in which: [Fig. 1] is a perspective view of the passenger compartment of a vehicle according to a first embodiment of the invention; [Fig. 2] is a perspective view of the passenger compartment of a vehicle according to a second embodiment of the invention; [Fig. 3] is a rear view of a vehicle according to the invention, the vehicle being subjected to acceleration along the Y-axis; [Fig. 4] is a side view of a vehicle according to the invention, the vehicle being subjected to acceleration along the X-axis; [Fig. 5] is a rear view of a vehicle according to the invention, the vehicle being subjected to acceleration along the Y-axis.

[014] In the remainder of this description, and with reference to the XYZ Cartesian coordinate system represented in Figures 1 and 2, the terms “longitudinal direction” will be used for a direction along the X-axis, “transverse direction” for a direction along the Y-axis, and “vertical direction” for a direction along the Z-axis. In addition, by convention, the term “front” will be used to indicate an orientation directed toward the front of the vehicle and the term “rear” will be used to indicate an orientation directed toward the rear of the vehicle.

[015] With reference to fig.1, a vehicle passenger compartment 10 is represented according to a first embodiment of the invention. In this embodiment, a first vertically oriented lighting column 12 is supported by a central mount 11 of the vehicle and is arranged on the side Petition 870220064377, dated 07 / 21 / 2022, pp. 14 / 23 8 / 13 left relative to the field of vision of a passenger seated in the rear of the vehicle and a second vertically oriented lighting column 12' is supported by another central mount 11' of the vehicle and is arranged on the right side relative to the field of vision of a passenger seated in the rear of the vehicle. Each lighting column 12, 12' comprises at least one light source configured to project a first straight beam of light onto a rear side window or a rear door panel 13 of the vehicle and to project a second straight beam of light onto the backrest of one of the front seats 15 or 15' of the vehicle.The first light beam emitted by the first lighting column 12 is projected onto the rear side window or the rear door panel 13 directly adjacent to the first lighting column 12 along a first line 14, hereinafter referred to as the first artificial horizon line, and the second light beam emitted by the first lighting column 12 is projected onto the backrest of the front seat 15 directly adjacent to the first lighting column 12 along a second line 16, referred to below as a second artificial horizon line.Similarly, the first light beam emitted by the second lighting column 12' is projected onto the rear side window or the rear door panel (not shown) directly adjacent to the second lighting column 12' along a first line 14', hereinafter referred to as the first artificial horizon line, and the second light beam emitted by the second lighting column 12' is projected onto the backrest of the front seat 15' directly adjacent to the second lighting column 12' along a second line 16', hereinafter referred to as the second artificial horizon line. In this configuration, the first and second artificial horizon lines are perpendicular or substantially perpendicular to each other.

[016] By properly controlling the light source(s), it is thus possible to align the first and second artificial horizon lines 14, 16 and 14', 16' on a horizontal plane that is always perpendicular to the vector. Petition 870220064377, dated 07 / 21 / 2022, pp. 15-23 9 / 13 of gravity. Thus, a person sitting next to the rear side window 13 and behind the front seat 15 and staring at the aforementioned artificial horizon lines 14, 16 will have the same visual sensations as the driver looking at the road: therefore, they will no longer be subject to motion sickness. To achieve this result, the vehicle 10 is advantageously equipped with a triaxial accelerometer configured to detect the vehicle's accelerations along the 3 axes X, Y and Z and to emit corresponding acceleration signals, and a control unit capable of receiving the acceleration signals emitted by the accelerometer and controlling the light source(s) so that the first and second artificial horizon lines 14, 16 and 14', 16' are aligned in a horizontal plane A, perpendicular to the gravity vector, whatever the vehicle's accelerations, the control unit being, moreover, configured to process the aforementioned acceleration signals.previously under the control of light sources, in order to determine, in real time, an acceleration frequency according to each of the accelerometer axes and to control said light sources only when said acceleration frequency is lower than a threshold frequency below which motion sickness is likely to occur.

[017] With reference to Fig. 2, a vehicle passenger compartment is represented according to a second embodiment of the invention. In this embodiment, the motion sickness device comprises at least three vertically oriented light columns, respectively, a first light column 12 which is supported by a central mount 11 of the vehicle and which is arranged on the left side in relation to the field of vision of a passenger seated in the rear of the vehicle, a second light column 12' which is supported by another central mount 11' of the vehicle and which is arranged on the right side in relation to the field of vision of a passenger seated in the rear of the vehicle, and a third light column 12 which is supported by a side mount 11 which is part of a rear side window or a Petition 870220064377, dated 07 / 21 / 2022, pp. 16 / 23 10 / 13 rear door panel 13 and on the left side in relation to the field of vision of a passenger seated in the rear of the vehicle. Each light column 12, 12', 12 is formed by a plurality of luminous points aligned vertically, each of the luminous points being able to emit light in an activated state and not emit light in a deactivated state. Thus, a first artificial horizon line 14 is formed by the virtual straight line passing through the highest activated luminous points 17 and 17 in the first and third light columns 12, 12 respectively, and a second artificial horizon line is formed by the virtual straight line passing through the highest activated luminous points 17 and 17' in the first and second light columns 12, 12' respectively. In this configuration, the first and second artificial horizon lines 14, 16 are perpendicular or substantially perpendicular to each other.In an advantageous variant of the invention, each of the luminous columns 12, 12' and 12 could comprise, for example, a linear network of vertically aligned electroluminescent diodes, each of the electroluminescent diodes forming one of the luminous points of the luminous columns. In another configuration of the invention, the luminous points could be activated from the top of each luminous column. In this case, the first artificial horizon line 14 will be formed by the virtual straight line passing through the lowest activated luminous points in the first and third luminous columns 12, 12 respectively, and the second artificial horizon line 16 will be formed by the virtual straight line passing through the lowest activated luminous points in the first and second luminous columns 12, 12' respectively.Furthermore, vehicle 10 may advantageously comprise a fourth light column (not shown) which will be supported by a side mount that forms part of a rear side window or a rear door panel and on the right side in relation to the field of vision of a passenger seated in the rear of the vehicle, said fourth light column allowing to define, in. Petition 870220064377, dated 07 / 21 / 2022, pages 17 / 23 11 / 13 combination with the second luminous column 12', a third artificial horizon line 14' on the right side of the vehicle.

[018] By properly controlling the electroluminescent diodes of the first, second and third light columns 12, 12' and 12, it is thus possible to align the first and second artificial horizon lines 14, 16 in a horizontal plane that is always perpendicular to the gravity vector. Thus, a person sitting next to a rear side window or a rear side door panel 13 and behind the front seat 15 and staring at the aforementioned artificial horizon lines 14, 16 will have the same visual sensations as the driver looking at the road: then, he will no longer be subject to motion sickness.The control unit will, moreover, be configured to process the aforementioned acceleration signals, previously under the control of the electroluminescent diodes, in order to determine, in real time, an acceleration frequency along each of the accelerometer axes and control the aforementioned electroluminescent diodes only when the aforementioned acceleration frequency is lower than a threshold frequency below which motion sickness is likely to occur.

[019] The two embodiments described above are obviously not limiting to the invention. Other embodiments may be considered at this level.

[020] Figs. 3 to 5 illustrate various possible driving conditions and the corresponding operation of the motion sickness device of the invention.

[021] Thus, in the case where vehicle 10 travels on a road inclined to the left relative to a fixed horizontal plane H, perpendicular to the gravity vector, as shown in Fig. 3, it is subjected to acceleration along the Y-axis. This acceleration is detected by the triaxial accelerometer, which sends a corresponding acceleration signal to the control unit. In response to this acceleration signal, the control unit determines, in real time, a frequency Petition 870220064377, dated 07 / 21 / 2022, pages 18 / 23 12 / 13 of the acceleration frequency is measured along each of the accelerometer axes and this acceleration frequency is compared to a threshold frequency below which motion sickness is likely to occur. In this case, since the acceleration frequency determined in real time along the Y-axis is lower than the threshold frequency, the control unit commands the display of the luminous markers intended to form the artificial horizon lines so that they are aligned on the horizontal plane A inclined relative to the vehicle floor P at the level of the Y-axis.

[022] In the case where vehicle 10 travels on a road inclined downwards with respect to a fixed horizontal plane H, perpendicular to the gravity vector, as shown in Fig. 4, it is subjected to acceleration along the X-axis. This acceleration is detected by the triaxial accelerometer, which sends a corresponding acceleration signal to the control unit. In response to this acceleration signal, the control unit determines, in real time, an acceleration frequency along each of the accelerometer axes and compares this acceleration frequency with a threshold frequency below which motion sickness is likely to occur.In this case, since the acceleration frequency determined in real time along the X-axis is lower than the limit frequency, the control unit commands the display of the luminous markers intended to form the artificial horizon lines so that they are aligned on the horizontal plane A inclined in relation to the vehicle floor P at the level of the X-axis.

[023] In the case where vehicle 10 is traveling on a flat road and makes a left turn, as shown in Fig. 5, it is subjected to acceleration along the Y-axis. This acceleration is detected by the triaxial accelerometer, which sends a corresponding acceleration signal to the control unit. In response to this acceleration signal, the control unit determines, in real time, an acceleration frequency along each of the accelerometer axes and compares this acceleration frequency with a threshold frequency below which motion sickness is likely to occur. Petition 870220064377, dated 07 / 21 / 2022, pages 19 / 23 13 / 13 of the event. In the present case, the acceleration frequency determined in real time along the Y-axis being lower than the limit frequency, the control unit commands the display of the luminous markers intended to form the artificial horizon lines so that they are aligned on the horizontal plane A inclined in relation to the vehicle floor P at the level of the Y-axis.

[024] Furthermore, the invention also aims to protect a method for displaying luminous markers intended to combat motion sickness. This method may, in particular, comprise the following steps: - detection by means of a triaxial accelerometer of the accelerations of a vehicle along 3 axes and sending corresponding signals to a control unit; - real-time determination of an acceleration frequency along each of the accelerometer axes and comparison between the determined acceleration frequency and a threshold frequency below which motion sickness is likely to occur; - in the event that the determined acceleration frequency is lower than the limit frequency, control by the control unit of means of displaying luminous markers capable of forming at least one first artificial horizon line at the level of a first interior surface of the motor vehicle and at least one second artificial horizon line at the level of a second interior surface of the motor vehicle, said first and second artificial horizon lines being perpendicular or substantially perpendicular to each other, so that the first and second artificial horizon lines are aligned in a horizontal plane, perpendicular to the gravity vector, whatever the accelerations of the vehicle. Petition 870220064377, dated 07 / 21 / 2022, pages 20 / 23

Claims

1 / 5 CLAIMS 1. Motion sickness device equipping a motor vehicle (10), characterized in that the motion sickness device comprises: - a triaxial accelerometer configured to detect the accelerations of the vehicle (10) along 3 axes and to emit a corresponding acceleration signal; - display means (12, 12', 12") of luminous markers capable of forming at least one first artificial horizon line (14, 14') at the level of a first interior surface (13) of the motor vehicle and at least one second artificial horizon line (16, 16') at the level of a second interior surface (15, 15') of the motor vehicle, said first and second artificial horizon lines (14, 16; 14', 16') being perpendicular or substantially perpendicular to each other;- a control unit capable of receiving the acceleration signals emitted by the accelerometer and controlling the display means (12, 12', 12) in such a way that the first and second artificial horizon lines (14, 16; 14', 16') are aligned in a horizontal plane (A), perpendicular or substantially perpendicular to the gravitation vector, whatever the accelerations of the vehicle, the control unit being, on the other hand, configured to process said acceleration signals, before commanding the display means (12, 12', 12), in order to determine in real time an acceleration frequency along each of the accelerometer axes and to control said display means (12, 12', 12) only when said acceleration frequency is lower than a threshold frequency below which motion sickness is likely to occur.

2. Device according to claim 1, characterized in that the limit frequency is equal to 25 Hz.

3. Device according to claim 1, characterized in that the limit frequency is between 4 and 8 Hz. Petition 870220051282, dated 10 / 06 / 2022, p. 10 / 15 2 / 5 4. Device, according to claim 1, characterized in that the limit frequency is equal to 0.5 Hz for accelerations along a longitudinal axis, corresponding to the front-to-rear direction of the vehicle, and along a lateral axis, corresponding to the right-to-left direction of the vehicle, and is equal to 2 Hz for accelerations along a vertical axis, corresponding to the high-to-low direction of the vehicle.

5. Device, according to any of the preceding claims, characterized in that the display means (12, 12', 12) are capable of emitting at least two light beams in a straight line, respectively a first light beam projected onto the first inner surface (13) and forming the first artificial horizon line (14, 14'), and a second light beam projected onto the second inner surface (15, 15') and forming the second artificial horizon line (16, 16').

6. Device according to claim 5, characterized in that the display means (12, 12', 12) comprise at least one light source emitting a main light beam and means for separating and diverting said main light beam into two secondary light beams.

7. Device according to claim 6, characterized in that the separation and diversion means comprise a prism intended to separate the light beam into two secondary light beams and a combination of mirrors and / or lenses intended to modify the trajectory of said secondary light beams.

8. Device according to claim 5, characterized in that the display means (12, 12', 12) comprise at least one pair of light sources, respectively a first light source emitting the first light beam and a second light source emitting the second light beam. Petition 870220051282, dated 10 / 06 / 2022, p. 11 / 15 3 / 5 9. Device according to any one of claims 6 to 8, characterized in that the light source, or pair of light sources, is a laser, or a pair of lasers.

10. Device according to any one of claims 1 to 4, characterized in that the display means comprise at least three vertically oriented luminous columns (12, 12', 12), respectively, a first luminous column (12) arranged in alignment with the first interior surface (13) and in alignment with the second interior surface (15, 15'), a second luminous column (12') arranged in alignment with the second interior surface (15, 15') and to the left or right of the first luminous column (12), and a third luminous column (12) arranged in alignment with the first interior surface (13) and closer to the rear of the vehicle than the first luminous column (12), each of the luminous columns (12, 12', 12) being formed by a plurality of vertically aligned luminous points, each of the luminous points being able to emit light in an activated state and not emit light in a deactivated state,and that the first artificial horizon line (14) is formed by the virtual straight line that passes through the highest or lowest activated light points (17, 17) in the first and third light columns (12, 12) respectively, and the second artificial horizon line (16) is formed by the virtual straight line that passes through the highest or lowest activated light points (17, 17') in the first and second light columns (12, 12'), respectively.

11. Device according to claim 10, characterized in that each of the luminous columns (12, 12', 12) comprises a linear network of vertically aligned electroluminescent diodes, each of the electroluminescent diodes forming a luminous point.

12. Motorized vehicle (10), characterized in that it is equipped with an anti-motion sickness device, according to any of the preceding claims. Petition 870220051282, dated 10 / 06 / 2022, page 12 / 15 4 / 5 13. Motor vehicle (10) fitted with an anti-motion sickness device, according to any of claims 5 to 9, characterized in that it comprises at least one central mount (11, 11'), said central mount supporting the display means (12, 12'), said display means being configured to project the first light beam onto a rear side window or a rear door panel (13) of the vehicle and to project the second light beam onto an interior surface (15, 15') of the passenger compartment arranged substantially perpendicular to said window or said door panel (13), for example, the backrest of one of the front seats of the vehicle.

14. A method for displaying luminous markers intended to combat motion sickness, characterized by the fact that it comprises the following steps: - detection by means of a triaxial accelerometer of the accelerations of a vehicle along 3 axes and transmission of corresponding signals to a control unit; - real-time determination of an acceleration frequency along each of the accelerometer axes and comparison between the determined acceleration frequency and a threshold frequency below which motion sickness is likely to occur;- in the event that the determined acceleration frequency is lower than the limit frequency, the control by the control unit of the display means (12, 12', 12) of luminous markers capable of forming at least one first artificial horizon line (14, 14') at the level of a first interior surface (13) of the motor vehicle and at least one second artificial horizon line (16, 16') at the level of a second interior surface (15, 15') of the motor vehicle, the said first and second artificial horizon lines (14, 16; 14', 16') being perpendicular or substantially perpendicular to each other, in such a way that the first and second artificial horizon lines (14, 16; 14', 16') are aligned Petition 870220051282, of 10 / 06 / 2022, p. 13 / 15 5 / 5 on a horizontal plane (A), perpendicular to the gravity vector, regardless of the vehicle's accelerations. Petition 870220051282, dated 10 / 06 / 2022, page 14 / 15;

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