Motion sickness prevention system

Abstract

To provide a motion sickness prevention system that can easily notify an occupant of a right and left direction movement mode of a vehicle.SOLUTION: A motion sickness prevention system 1, 101, and 201 mounted on a vehicle 2 equipped with a front row seat 5 and a rear row seat 6 placed on a floor 4 in a front-rear direction includes: an acquisition device 21 and 103 for acquiring behavioral information on the behavior of the vehicle; a seatback light emission device 31 extending in a vehicle width direction on a back face of a seatback 9 in the front row seat for emitting light in a plurality of areas aligned in the extending direction; and a control device 24 for controlling the seatback light emission device. The control device determines presence or absence of a turning behavior of the vehicle on the basis of the behavioral information acquired by the acquisition device, and when the turning behavior is determined to be present, dynamically changes the distribution of the light emission areas along the extending direction of the seatback light emission device in a mode corresponding to the turning behavior.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a motion sickness prevention system for preventing motion sickness in passengers in a vehicle. [Background technology]

[0002] A motion sickness prevention system for a user in a vehicle is known (for example, see Patent Document 1). The motion sickness prevention system of Patent Document 1 includes an optical array system having a plurality of optical elements.

[0003] The light array system is installed in the pillars, roof, side walls, doors, floor, dashboard, console, windows, etc. of the vehicle interior so as to extend in the front-rear direction. The light array system includes light elements, and the light array system simulates the movement of the vehicle by emitting the light from the light elements. This allows the movement of the vehicle to be perceived visually, thereby reducing the mismatch between visual information and sensory information obtained by the inner ear, etc., and reducing the frequency and severity of motion sickness. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2019-523657 Summary of the Invention [Problem to be solved by the invention]

[0005] In the motion sickness prevention system of Patent Document 1, the light array system is arranged to extend in the forward / rearward direction, which causes a problem in that it is difficult to inform occupants of the left-right movement of the vehicle by the light emitted by the light elements.

[0006] In view of the above, an object of the present invention is to provide a motion sickness prevention system that can easily notify occupants of the lateral movement of a vehicle. [Means for solving the problem]

[0007] In order to solve the above problems, one aspect of the present invention is a motion sickness prevention system (1, 101, 201) mounted on a vehicle (2) having a front row seat (5) and a rear row seat (6) placed side by side in front of and behind on a floor (4), the system comprising an acquisition device (21, 103) for acquiring behavior information related to the behavior of the vehicle, a seat back light-emitting device (31) extending in the vehicle width direction on the back of the seat back (9) of the front row seat and capable of emitting light in multiple areas lined up in the extension direction, and a control device (24) for controlling the seat back light-emitting device, the control device determining whether or not the vehicle is turning based on the behavior information acquired by the acquisition device, and when it is determined that the turning behavior is present, dynamically changing the distribution of the light-emitting areas along the extension direction of the seat back light-emitting device in a manner corresponding to the turning behavior in a manner corresponding to the turning behavior.

[0008] According to this aspect, the seat back light emitting device is provided to extend in the vehicle width direction, which allows the distribution of the light emitting areas to change in accordance with the left-right movement of the vehicle, making it easier for the occupant to be notified of the left-right movement of the vehicle.

[0009] In the above aspect, the seat back light emitting device is preferably located at an upper end of the rear surface of the seat back of the front row seat.

[0010] According to this aspect, the light emitted by the seat back light emitting device can be easily recognized by the occupant.

[0011] In addition, in the above aspect, preferably, the acquisition device includes an acceleration sensor (21A) that detects the acceleration of the vehicle, and the control device dynamically changes the distribution of the light-emitting area of ​​the seat back light-emitting device along the extension direction of the seat back light-emitting device in accordance with the lateral acceleration detected by the acceleration sensor.

[0012] According to this aspect, the change in the light emitting area enables the passenger to recognize that an inertial force is being applied to his or her body, thereby making it possible to prevent motion sickness.

[0013] In the above aspect, preferably, the seat back light emitting device includes a plurality of light emitting elements (31A) each capable of emitting light and arranged in the vehicle width direction.

[0014] According to this aspect, by controlling the timing of light emission of the light emitting elements, etc., it is possible to dynamically change the light emitting area of ​​the seat back light emitting device.

[0015] In addition, in the above aspect, preferably, when acceleration in the left direction is detected by the acceleration sensor, the control device causes the light-emitting elements to blink or emit light in sequence from left to right, and when acceleration in the right direction is detected, the control device causes the light-emitting elements to blink or emit light in sequence from right to left.

[0016] According to this aspect, the blinking or lighting of the light-emitting element allows the occupant to predict the direction of the inertial force acting on his or her body, thereby making it possible to prevent motion sickness.

[0017] In addition, in the above aspect, it is preferable that the vehicle further includes a floor light-emitting device (41) that is arranged extending in the fore-and-aft direction on the floor and is capable of emitting light in multiple areas lined up in the extension direction, and the control device dynamically changes the distribution of the light-emitting areas of the floor light-emitting device in the fore-and-aft direction in a manner corresponding to the fore-and-aft acceleration of the vehicle detected by the acceleration sensor.

[0018] According to this aspect, the change in the light emitting area of ​​the floor light emitting device enables the passenger to recognize that an inertial force is being applied to his or her body in the forward / rearward direction, thereby making it possible to prevent motion sickness.

[0019] In addition, in the above aspect, it is preferable that the vehicle further includes a pillar light emitting device (43) extending in the fore-and-aft direction along the front pillar (18) and capable of emitting light in a plurality of areas aligned along the extension direction, and the control device dynamically changes the distribution of the light emitting areas of the pillar light emitting device in the fore-and-aft direction in a manner corresponding to the fore-and-aft acceleration of the vehicle detected by the acceleration sensor.

[0020] According to this aspect, the change in the light emitting area of ​​the pillar light emitting device enables the occupant to recognize that an inertial force is being applied to his or her body in the forward or rearward direction, thereby making it possible to prevent motion sickness.

[0021] In addition, in the above aspect, it is preferable that the door trim (15, 16) further includes a door light emitting device (45, 46) extending in the fore-and-aft direction and capable of emitting light in a plurality of areas aligned along the extension direction, and the control device dynamically changes the distribution of the light emitting areas of the door light emitting device in the fore-and-aft direction in response to the fore-and-aft acceleration of the vehicle detected by the acceleration sensor.

[0022] According to this aspect, the change in the light emitting area of ​​the door light emitting device enables the passenger to recognize that an inertial force is being applied to his or her body in the forward or rearward direction, thereby making it possible to prevent motion sickness.

[0023] In addition, in the above aspect, it is preferable that the vehicle has a pillar light-emitting device (43) extending fore-and-aft along the front pillar (18) and capable of emitting light in a plurality of areas aligned along the extension direction, and a door light-emitting device (46) extending fore-and-aft in a door trim (16) located on the side of the rear row seat and capable of emitting light in a plurality of areas aligned along the extension direction, and the control device dynamically changes the distribution of the light-emitting areas of the pillar light-emitting device and the distribution of the light-emitting areas of the door light-emitting device in the fore-and-aft direction in a manner corresponding to the longitudinal acceleration of the vehicle detected by the acceleration sensor, and sets the rate of change of the light-emitting area of ​​the pillar light-emitting device higher than that of the door light-emitting device.

[0024] According to this aspect, the driver perceives the acceleration as greater than the actual acceleration applied and decelerates the vehicle, so that the driver is urged not to accelerate too much, thereby improving the safety of the vehicle.

[0025] In addition, in the above aspect, preferably, the vehicle has a front-row door light-emitting device (45) extending fore-and-aft in a door trim (15) located on the side of the front row seat located in the forefront row on the floor and capable of emitting light in a plurality of areas lined up along the extension direction, and a rear door light-emitting device (46) extending fore-and-aft in a door trim (16) located on the side of the rear row seat located behind the front row seat located in the forefront row on the floor and capable of emitting light in a plurality of areas lined up along the extension direction, and the control device dynamically changes the distribution of the light-emitting areas of the front-row door light-emitting device and the distribution of the light-emitting areas of the rear door light-emitting device in the fore-and-aft direction, respectively, in a manner corresponding to the forward / rear acceleration of the vehicle detected by the acceleration sensor, and sets the rate of change of the light-emitting area of ​​the front-row door light-emitting device to be higher than that of the rear door light-emitting device.

[0026] According to this aspect, the driver perceives the acceleration as greater than the actual acceleration applied and decelerates the vehicle, so that the driver is urged not to accelerate too much, thereby improving the safety of the vehicle.

[0027] In addition, in the above aspect, preferably, the acquisition device includes a navigation device (103) that acquires a current location of the vehicle and a planned driving route of the vehicle, and the control device acquires the presence or absence of the turning behavior based on the current location and the planned driving route.

[0028] According to this aspect, the passenger can recognize in advance that an inertial force may be applied to his or her body, thereby making it possible to prevent motion sickness. Effect of the Invention

[0029] One aspect of the present invention is a motion sickness prevention system mounted on a vehicle having a front row seat and a rear row seat arranged side by side on a floor, the motion sickness prevention system having an acquisition device for acquiring behavior information related to the behavior of the vehicle, a seat back light emitting device extending in the vehicle width direction on the back surface of the seat back of the front row seat and capable of emitting light in a plurality of areas arranged in the extension direction, and a control device for controlling the seat back light emitting device, the control device determining the presence or absence of a turning behavior of the vehicle based on the behavior information acquired by the acquisition device, and when it is determined that the turning behavior is present, dynamically changing the distribution of the light emitting areas in a manner corresponding to the turning behavior along the extension direction of the seat back light emitting device. According to this aspect, the seat back light emitting device is provided so as to extend in the vehicle width direction. Therefore, it is possible to change the distribution of the light emitting areas in accordance with the movement of the vehicle in the left and right direction, and it becomes easier for the occupants to be notified of the left and right movement mode of the vehicle.

[0030] In the above aspect, the seat back light emitting device is preferably located at an upper end of the rear surface of the seat back of the front row seat. According to this aspect, the light emitted by the seat back light emitting device is easily recognized by the occupant.

[0031] In the above aspect, the acquisition device preferably includes an acceleration sensor that detects the acceleration of the vehicle, and the control device dynamically changes the distribution of the light-emitting areas of the seat back light-emitting devices along the extending direction of the seat back light-emitting devices in response to the lateral acceleration detected by the acceleration sensor. According to this aspect, the change in the light-emitting areas allows the occupant to recognize that an inertial force is being applied to his or her body, thereby preventing motion sickness.

[0032] In the above aspect, preferably, the seat back light emitting device includes a plurality of light emitting elements each capable of emitting light and arranged in the vehicle width direction. According to this aspect, the light emitting region of the seat back light emitting device can be dynamically changed by controlling the timing of light emission of each of the light emitting elements.

[0033] In the above aspect, preferably, the control device causes the light-emitting elements to blink or emit light in sequence from left to right when the acceleration sensor detects acceleration in the left direction, and causes the light-emitting elements to blink or emit light in sequence from right to left when the acceleration sensor detects acceleration in the right direction. According to this aspect, the blinking or emission of the light-emitting elements allows the occupant to predict the direction of the inertial force acting on his or her body, thereby preventing motion sickness.

[0034] In the above aspect, preferably, the vehicle further comprises a floor light-emitting device that is provided on the floor so as to extend in the front-rear direction and is capable of emitting light in a plurality of areas aligned in the extension direction, and the control device dynamically changes the distribution of the light-emitting areas of the floor light-emitting device in the front-rear direction in a manner corresponding to the front-rear acceleration of the vehicle detected by the acceleration sensor. According to this aspect, the change in the light-emitting areas of the floor light-emitting device allows the passenger to recognize that an inertial force is being applied to his or her body in the front-rear direction. This makes it possible to prevent motion sickness.

[0035] In the above aspect, preferably, the vehicle further includes a pillar light emitting device that extends longitudinally along the front pillar and is capable of emitting light in a plurality of areas aligned along the extension direction, and the control device dynamically changes the distribution of the light emitting areas of the pillar light emitting device in the longitudinal direction in a manner corresponding to the longitudinal acceleration of the vehicle detected by the acceleration sensor. According to this aspect, the change in the light emitting area of ​​the pillar light emitting device allows the occupant to recognize that an inertial force is being applied to his or her body in the longitudinal direction, thereby preventing motion sickness.

[0036] In the above aspect, preferably, the vehicle further includes a door light emitting device that extends in the front-rear direction on the door trim and is capable of emitting light in a plurality of areas aligned along the direction of extension, and the control device dynamically changes the distribution of the light emitting areas of the door light emitting device in the front-rear direction in response to the front-rear acceleration of the vehicle detected by the acceleration sensor. According to this aspect, the change in the light emitting area of ​​the door light emitting device allows the occupant to recognize that an inertial force is acting on his or her body in the front-rear direction, thereby preventing motion sickness.

[0037] In the above aspect, preferably, the vehicle has a pillar light emitting device extending in the front-rear direction along the front pillar and capable of emitting light in a plurality of areas aligned along the extending direction, and a door light emitting device extending in the front-rear direction in a door trim located on the side of the rear row seat and capable of emitting light in a plurality of areas aligned along the extending direction, and the control device dynamically changes the distribution of the light emitting areas of the pillar light emitting device and the distribution of the light emitting areas of the door light emitting device in the front-rear direction in a manner corresponding to the longitudinal acceleration of the vehicle detected by the acceleration sensor, and sets the changing speed of the light emitting areas of the pillar light emitting device higher than that of the door light emitting device. According to this aspect, the driver recognizes that the acceleration is greater than the actual acceleration applied and decelerates the vehicle, so that the driver can be encouraged not to accelerate too much, thereby improving the safety of the vehicle.

[0038] In the above aspect, preferably, the vehicle includes a front door light emitting device extending in the front-rear direction on a door trim located on the side of the front row seat located in the front row on the floor and capable of emitting light in a plurality of areas aligned along the extending direction, and a rear door light emitting device extending in the front-rear direction on a door trim located on the side of the rear row seat located behind the front row seat located in the front row on the floor and capable of emitting light in a plurality of areas aligned along the extending direction, and the control device dynamically changes the distribution of the light emitting areas of the front door light emitting device and the rear door light emitting device in the front-rear direction in a manner corresponding to the front-rear acceleration of the vehicle detected by the acceleration sensor, and sets the changing speed of the light emitting area of ​​the front door light emitting device higher than that of the rear door light emitting device. According to this aspect, the driver recognizes that the acceleration is greater than the actual acceleration applied and decelerates the vehicle, so that the driver can be encouraged not to accelerate too much, thereby improving the safety of the vehicle.

[0039] In the above aspect, preferably, the acquisition device includes a navigation device that acquires a current location of the vehicle and a planned travel route of the vehicle, and the control device acquires the presence or absence of the turning behavior based on the current location and the planned travel route. According to this aspect, the occupant can recognize in advance that an inertial force may be applied to his or her own body, thereby preventing motion sickness. [Brief description of the drawings]

[0040] [Figure 1] FIG. 1 is a perspective view of a vehicle interior equipped with a motion sickness prevention system according to a first embodiment; [Diagram 2] FIG. 1 is a top view of a vehicle interior equipped with a motion sickness prevention system according to a first embodiment; [Diagram 3] Block diagram of the motion sickness prevention system [Figure 4] A diagram showing the interior of the vehicle when looking at the back of the front seats from the rear seat [Diagram 5] FIG. 1 is a diagram showing a front part of a passenger compartment of a vehicle equipped with a motion sickness prevention system according to an embodiment; [Figure 6] 1 is a flowchart showing a light emission process of the motion sickness prevention system according to the first embodiment; [Figure 7] FIG. 1 is an explanatory diagram showing a change over time in the light-emitting area of ​​a seat back light-emitting device when a vehicle (A) is turning left and (B) is turning right. [Figure 8] FIG. 1 is an explanatory diagram showing the change over time in the light-emitting area of ​​a floor light-emitting device when a vehicle (A) is accelerating and (B) is stalling. [Figure 9] An explanatory diagram to explain the visual field of a passenger sitting in the rear seat and operating a smartphone [Figure 10] 11 is a flowchart showing a light emission process of the motion sickness prevention system according to the second embodiment. [Figure 11] 13A and 13B are diagrams showing modified examples of the light emission modes of the left and right light emitting devices; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] An example in which a motion sickness prevention system 1 of the present invention is applied to a vehicle 2 will be described below with reference to the drawings. In the following description, the front / rear, left / right, and up / down directions are defined with respect to the vehicle.

[0042] <<First embodiment>> As shown in Figures 1 and 2, a vehicle 2 to which a motion sickness prevention system 1 is applied is a so-called four-wheeled automobile. The vehicle 2 is provided with a passenger compartment 3 into which passengers board. A pair of left and right front seats 5 and a pair of left and right rear seats 6 are placed side by side in the front-to-rear direction on a floor 4 (also called a floor) that defines the bottom of the passenger compartment 3. One of the pair of left and right front seats 5 constitutes a driver's seat, and the other constitutes a so-called passenger seat.

[0043] The front seat 5 is located in front of the rear seat 6, and the rear seat 6 is located behind the front seat 5. In other words, the front seat 5 constitutes a front row seat lined up in front of the rear seat 6, and is located in the forefront row of seats arranged in the vehicle cabin. The rear seat 6 constitutes a rear row seat located behind the front seat 5.

[0044] The front seat 5 and the rear seat 6 each have a seat cushion 8 supported on the floor 4, a seat back 9 connected to the rear of the seat cushion 8, and a headrest 10 provided on the upper side of the seat back 9.

[0045] In this embodiment, the seat cushions 8 are connected to the floor 4 via a pair of left and right slide rails 11 extending in the front-rear direction. This allows the front seat 5 and the rear seat 6 to slide in the front-rear direction relative to the floor 4.

[0046] An instrument panel 12 is provided in front of the front seat 5. A front door 13 is provided on the vehicle exterior side of the front seat 5, and a rear door 14 is provided on the vehicle exterior side of the rear seat 6. Door trims 15, 16 are coupled to the vehicle interior side surfaces of the front door 13 and the rear door 14, respectively.

[0047] A windshield 17 (also called a front window) is provided in front of the front seats 5. Pillars (hereinafter, front pillars 18, also called A-pillars) are provided on both left and right edges of the windshield 17. The front pillars 18 extend obliquely upward toward the rear.

[0048] Next, we will explain the motion sickness prevention system 1. The motion sickness prevention system 1 is a system that aims to make it difficult for passengers to get motion sickness and to reduce the severity of motion sickness if the passenger does get motion sickness, and in this specification, preventing motion sickness is described as both making passengers less likely to get motion sickness and reducing the severity of motion sickness.

[0049] As shown in FIG. 3, the motion sickness prevention system 1 includes a behavior sensor 21, a light emitting device 22, and a control device 24 that controls the light emitting device 22 based on a signal from the behavior sensor 21.

[0050] The behavior sensor 21 is a device (acquisition device) for acquiring information related to the behavior of the vehicle 2, i.e., behavior information, and is connected to the control device 24. The behavior of the vehicle 2 here includes, for example, turning in the left and right direction of the vehicle 2, and acceleration and deceleration of the vehicle 2. The behavior information acquired by the behavior sensor 21 includes, for example, the longitudinal acceleration, left and right acceleration (lateral acceleration), up and down acceleration, roll rate, pitch rate, yaw rate, longitudinal speed, left and right speed, up and down speed, vehicle speed, etc. of the vehicle 2.

[0051] In this embodiment, the behavior sensor 21 is configured with an acceleration sensor 21A that acquires the longitudinal acceleration and lateral acceleration of the vehicle 2. However, without being limited to this aspect, the behavior sensor 21 may be configured with a six-axis inertial sensor 21B that detects the longitudinal, lateral, and vertical accelerations, and the angular velocities of the roll rate, pitch rate, and yaw rate. The behavior sensor 21 may include, for example, a steering angle sensor 21C that detects a steering angle, an accelerator sensor 21D that detects the amount of depression of an accelerator pedal, a brake sensor 21E that detects the amount of depression of a brake pedal, and a vehicle speed sensor 21F that detects the vehicle speed.

[0052] The light emitting device 22 is provided in the vehicle interior 3 and emits light toward the interior of the vehicle interior 3. The light emitting device 22 is connected to and controlled by the control device 24. The light emitting device 22 includes a plurality of left and right light emitting devices 26 extending in the vehicle width direction, a plurality of front and rear light emitting devices 27 extending in the front-rear direction, and an auxiliary light emitting device 28.

[0053] The left and right light emitting devices 26 include a seat back light emitting device 31 and a panel light emitting device 32 .

[0054] 4, the seat back light emitting device 31 is provided on the back surface of the seat back 9 of each of the left and right front seats 5. More specifically, the seat back light emitting device 31 is located at the upper end of the back surface of the seat back 9 of the front seat 5, and extends in the vehicle width direction (left and right direction).

[0055] 5, the panel light emitting device 32 is provided on the instrument panel 12 located in front of the front seat 5. In this embodiment, the panel light emitting device 32 is provided in a portion of the instrument panel 12 in front of the front seat 5 constituting the passenger seat, and extends in the left-right direction.

[0056] Each of the left and right light emitting devices 26 includes light emitting elements arranged in the left-right direction. More specifically, as shown in Fig. 4, each of the seat back light emitting devices 31 includes light emitting elements 31A arranged in the vehicle width direction at the upper end of the rear surface of the seat back 9. As shown in Fig. 5, the panel light emitting device 32 also includes light emitting elements 32A arranged in the vehicle width direction. When the light emitting elements emit light, light emitting areas corresponding to the emitted light emitting elements of the left and right light emitting devices 26 emit light.

[0057] As shown in FIG. 3, the front and rear light emitting devices 27 include a floor light emitting device 41, a door light emitting device 42, and a pillar light emitting device 43.

[0058] As shown in FIG. 4, the floor light emitting device 41 is provided on the floor 4 so as to extend in the front and rear directions. In this embodiment, the floor light emitting device 41 is provided in a portion between the front seat 5 and the rear seat 6 of the floor 4, and a pair of left and right floor light emitting devices 41 are provided behind the left front seat 5 and the right front seat 5, respectively. Also, as shown in FIG. 5, a pair of left and right floor light emitting devices 41 are provided in front of the front seat 5 constituting the passenger seat so as to extend in the front and rear directions. On the other hand, no floor light emitting device 41 is provided in front of the front seat 5 constituting the driver's seat. The floor light emitting device 41 is preferably provided on the outer side of both the left and right legs of an occupant seated in the corresponding seat located at the rear. For example, as shown in FIG. 4, the floor light emitting device 41 provided in the portion between the front seat 5 and the rear seat 6 of the floor 4 may extend in the front and rear directions slightly outside the left and right slide rails 11, respectively.

[0059] 1, 2, and 5, the door light emitting device 42 includes a front door light emitting device 45 provided on the door trim 15 of each of the left and right front doors 13, and a rear door light emitting device 46 provided on the door trim 16 of each of the left and right rear doors 14. Each of the front door light emitting devices 45 is located on the side of the front seat 5. The front door light emitting devices 45 are located on the left and right sides of the driver's seat and passenger seat.

[0060] 1, in this embodiment, the front door light emitting device 45 includes a main front door light emitting portion 45M extending in the front-rear direction along the upper edge of the door trim 15 of the front door 13, and a sub-front door light emitting portion 45S extending in the front-rear direction along the opening of a door pocket 15P provided in the door trim 15. The rear door light emitting device 46 includes a main rear door light emitting portion 46M extending in the front-rear direction along the upper edge of the door trim 16 of the rear door 14, and a sub-rear door light emitting portion 46S extending in the front-rear direction along the opening of a door pocket 16P provided in the door trim 16.

[0061] 5, the pillar light emitting device 43 is provided on the passenger compartment side surface of the front pillar 18. The pillar light emitting device 43 extends obliquely upward and rearward along the passenger compartment side surface of the front pillar 18.

[0062] Each of the front and rear light emitting devices 27 includes light emitting elements arranged in the front-rear direction. More specifically, each of the floor light emitting devices 41 includes a plurality of light emitting elements 41A arranged in the front-rear direction in a portion between the front seat 5 and the rear seat 6 of the floor 4. Each of the front door light emitting devices 45 (the main front door light emitting portion 45M and the auxiliary front door light emitting portion 45S) includes a plurality of light emitting elements 45A arranged in the front-rear direction on the door trim 15 of the front door 13. Each of the rear door light emitting devices 46 (the main rear door light emitting portion 46M and the auxiliary rear door light emitting portion 46S) includes a plurality of light emitting elements 46A arranged in the front-rear direction on the door trim 15 of the rear door 14. The pillar light emitting device 43 also includes a plurality of light emitting elements 43A arranged in the front-rear direction. When the light emitting elements emit light, a light emitting area corresponding to the emitted light emitting element of the front and rear light emitting device 27 emits light.

[0063] 4, the auxiliary light-emitting device 28 includes a pair of auxiliary light-emitting units 28A, 28B provided on both the left and right edges of the lower part of the rear surface of the seat back 9 of the front seat 5. The auxiliary light-emitting unit 28A on the left edge of the lower part of the rear surface (hereinafter referred to as left auxiliary light-emitting unit 28A) and the auxiliary light-emitting unit 28B on the right edge (hereinafter referred to as right auxiliary light-emitting unit 28B) each include a light-emitting element and can be turned on and off independently.

[0064] The control device 24 is a computer equipped with a central processing unit (CPU), RAM, ROM, and a storage device, and controls the light-emitting devices 22 based on behavior information acquired by the behavior sensor 21. More specifically, while the vehicle 2 is traveling, the control device 24 repeatedly executes a light-emitting process for controlling the light emission of the light-emitting elements included in the light-emitting devices 22 based on the behavior information, and controls the presence or absence of light-emitting areas of each of the light-emitting devices 22 and their distribution.

[0065] The light emission process executed by the control device 24 will be described below with reference to the flowchart shown in FIG.

[0066] In the first step ST1 of the light emission process, the control device 24 determines whether the vehicle 2 is turning, i.e., the presence or absence of a turning behavior, based on the behavior information acquired by the behavior sensor 21. In this embodiment, the control device 24 determines that a turning behavior is present when the magnitude of the lateral acceleration is equal to or greater than a predetermined threshold value (hereinafter, lateral threshold value). When the magnitude of the lateral acceleration is equal to or greater than the lateral threshold value (turning behavior is present), the control device 24 executes step ST2, and otherwise executes step ST3.

[0067] In step ST2, the control device 24 determines the turning direction, and causes the left and right light emitting devices 26 to emit light so that the distribution of the light emitting areas changes dynamically in a manner corresponding to the turning behavior. More specifically, when the vehicle 2 is turning left (i.e., the left and right acceleration detected by the behavior sensor 21 is in the left direction), the control device 24 controls each of the left and right light emitting devices 26 so that the light emitting areas move leftward. When the vehicle 2 is turning right (i.e., the left and right acceleration detected by the behavior sensor 21 is in the right direction), the control device 24 controls each of the left and right light emitting devices 26 so that the light emitting areas move rightward.

[0068] In this embodiment, when the behavior sensor 21 detects acceleration in the left direction, the control device 24 blinks the light-emitting elements of the left and right light-emitting devices 26 in sequence from left to right. As a result, as shown in Fig. 7(A) , when the vehicle 2 is turning left, the areas corresponding to the light-emitting elements (in Fig. 7(A) , the light-emitting elements 31A of the seat back 9 of the front seat 5) are lit in sequence from left to right, respectively, so that the occupant recognizes that the light-emitting area 31B is dynamically moving from left to right (the light-emitting area is flowing from left to right).

[0069] Furthermore, when the behavior sensor 21 detects acceleration in the right direction, the control device 24 blinks the light-emitting elements of the left and right light-emitting devices 26 in sequence from right to left. As a result, as shown in Fig. 7(B) , when the vehicle 2 is turning right, the areas corresponding to the light-emitting elements (in Fig. 7(B) , the light-emitting elements 31A of the seat back 9 of the front seat 5) are lit in sequence from right to left, respectively, so that the occupant recognizes that the light-emitting area 31B is dynamically moving from right to left (the light-emitting area is flowing from left to right).

[0070] In this embodiment, the control device 24 controls the timing of blinking adjacent light-emitting elements of the left and right light-emitting devices 26 based on the magnitude of the left and right acceleration acquired by the behavior sensor 21. More specifically, the control device 24 sets a shorter time interval (delay) until the adjacent light-emitting element emits light as the magnitude of the left and right acceleration increases. As a result, the light-emitting areas 31B of the left and right light-emitting devices 26 move faster as the left and right acceleration of the vehicle 2 increases.

[0071] Furthermore, in step ST2, if the vehicle 2 is turning left (i.e., the lateral acceleration detected by the behavior sensor 21 is in the left direction), the control device 24 turns off the right auxiliary light emitting unit 28B on the lower right edge of the back surface of the seat back 9 and blinks the left auxiliary light emitting unit 28A on the left edge. Also, in step ST2, if the vehicle 2 is turning right (i.e., the lateral acceleration detected by the behavior sensor 21 is in the right direction), the control device 24 turns off the left auxiliary light emitting unit 28A on the lower left edge of the back surface of the seat back 9 and blinks the right auxiliary light emitting unit 28B on the right edge. After starting control of the left and right light emitting devices 26 and blinking of the auxiliary light emitting device 28, the control device 24 executes step ST4.

[0072] In step ST3, the control device 24 stops the light emission of the left and right light emitting devices 26 and the auxiliary light emitting device 28. When the stopping is completed, the control device 24 executes step ST4.

[0073] In step ST4, the control device 24 determines whether the vehicle 2 is accelerating or decelerating based on the behavior of the vehicle 2 acquired by the behavior sensor 21. More specifically, the control device 24 executes step ST5 when the magnitude of the longitudinal acceleration acquired by the behavior sensor 21 is equal to or greater than a predetermined threshold value (hereinafter, longitudinal threshold value), and executes step ST6 otherwise.

[0074] In step ST5, the control device 24 causes the front and rear light emitting devices 27 to emit light so that the distribution of the light emitting areas changes dynamically in a manner corresponding to the acceleration and deceleration of the vehicle 2. More specifically, when the vehicle 2 is accelerating (i.e., the front and rear acceleration detected by the behavior sensor 21 is in the forward direction), the control device 24 controls each of the front and rear light emitting devices 27 so that the light emitting areas move from front to rear (i.e., backward). When the vehicle 2 is decelerating (i.e., the front and rear acceleration detected by the behavior sensor 21 is in the backward direction), the control device 24 controls each of the front and rear light emitting devices 27 so that the light emitting areas move from rear to front (i.e., forward). After starting the control, the control device 24 ends the light emission process.

[0075] In step ST6, the control device 24 stops the light emission of the left and right light emitting devices 26. When the stopping is completed, the control device 24 ends the light emission process.

[0076] Next, the operation of the motion sickness prevention system 1 will be described.

[0077] When the vehicle 2 turns left, the control device 24 causes each of the left and right light emitting devices 26 to emit light such that the light emitting areas move leftward along the extension direction of the left and right light emitting devices 26. As a result, as shown in Fig. 7(A), each of the seat back light emitting devices 31 emits light such that its light emitting area 31B moves leftward along the extension direction of the seat back light emitting device 31. Similarly to the seat back light emitting device 31, the panel light emitting device 32 also emits light such that its light emitting area moves leftward along the extension direction of the panel light emitting device 32. In addition, the control device 24 turns off the auxiliary light emitting device 28 on the lower right edge of the back surface of the seat back 9 of the front seat 5, and causes the auxiliary light emitting device 28 on the left edge to blink.

[0078] On the other hand, when the vehicle 2 turns right, the control device 24 causes each of the left and right light emitting devices 26 to emit light such that the light emitting area moves rightward along the extension direction of the left and right light emitting devices 26. As a result, as shown in Fig. 7(B), each of the seat back light emitting devices 31 emits light such that its light emitting area 31B moves rightward along the extension direction of the seat back light emitting device 31. Similarly to the seat back light emitting device 31, the panel light emitting device 32 also emits light such that its light emitting area moves rightward along the extension direction of the panel light emitting device 32. In addition, the control device 24 turns off the left auxiliary light emitting unit 28A on the lower left edge of the back surface of the seat back 9, and blinks the right auxiliary light emitting unit 28B.

[0079] When the vehicle 2 accelerates, the control device 24 causes each of the front and rear light emitting devices 27 to emit light such that the light emitting area moves from front to rear (i.e., rearward) along the extension direction of the front and rear light emitting devices 27. As a result, as shown in Fig. 8(A), each of the floor light emitting devices 41 emits light such that its light emitting area 41B moves rearward along the extension direction of the floor light emitting device 41. Similarly to the floor light emitting device 41, the pillar light emitting device 43 and the door light emitting device 42 also emit light such that their light emitting areas move rearward along their respective extension directions.

[0080] When the vehicle 2 decelerates, the control device 24 causes each of the front and rear light emitting devices 27 to emit light such that the light emitting area 41B moves from rear to front (i.e., forward) along the extension direction of the front and rear light emitting devices 27, as shown in Fig. 8(B). As a result, each of the floor light emitting devices 41 emits light such that its light emitting area moves forward along the extension direction of the floor light emitting device 41. Similarly to the floor light emitting device 41, the pillar light emitting device 43 and the door light emitting device 42 also emit light such that their light emitting areas move forward along their respective extension directions.

[0081] Next, the effect of the motion sickness prevention system 1 will be described. When the vehicle 2 turns and the behavior sensor 21 detects a lateral acceleration equal to or greater than the lateral threshold, the left and right light-emitting devices 26 emit light so that the light-emitting areas move left and right. Therefore, the passenger can recognize that a left-right inertial force is applied to his or her body and the direction of the inertial force by the change in the light-emitting areas of the left and right light-emitting devices 26. This allows the passenger to prepare in advance for the inertial force and correct the misalignment between the semicircular canals and vision, thereby preventing motion sickness.

[0082] The left and right light emitting devices 26 are provided to extend in the left and right direction. Therefore, it is possible to change the distribution of the light emitting areas according to the movement of the vehicle 2 in the left and right direction, and the left and right movement mode of the vehicle 2 can be easily notified to the occupants. In particular, among the left and right light emitting devices 26, the seat back light emitting device 31 is located at the upper end of the back surface of the seat back 9 of the front seat 5, so that even if an occupant sitting in the rear seat 6 is operating a smartphone or reading a book, as shown in FIG. 9, the light emitted by the seat back light emitting device 31 can be easily recognized by the occupant.

[0083] The left and right light emitting devices 26 (seat back light emitting device 31 and panel light emitting device 32) each include a plurality of light emitting elements 31A, 32A arranged on the left and right. When the acceleration sensor 21A detects acceleration in the left direction, the control device 24 blinks the light emitting elements in sequence from left to right, and when the acceleration sensor 21A detects acceleration in the right direction, the control device 24 blinks the light emitting elements in sequence from right to left. This causes the light emitting area to move in the left and right direction according to the direction of the left and right acceleration. In this way, the control device 24 can dynamically change the light emitting area of ​​the left and right light emitting devices 26 by controlling the timing of light emission of the light emitting elements 31A, 32A, respectively. The moving direction of the left and right light emitting devices 26 allows the occupant to predict the direction of the inertial force acting on his or her body, thereby preventing motion sickness.

[0084] When the vehicle 2 accelerates or decelerates and the behavior sensor 21 detects a longitudinal acceleration equal to or greater than the longitudinal threshold, the front and rear light emitting devices 27 emit light so that the light emitting areas move forward and backward. More specifically, the floor light emitting devices 41, the pillar light emitting devices 43, and the door light emitting devices 42 included in the front and rear light emitting devices 27 emit light so that the light emitting areas move from front to rear when the vehicle 2 accelerates and the behavior sensor 21 detects a longitudinal acceleration equal to or greater than the longitudinal threshold, and emit light so that the light emitting areas move from rear to front when the vehicle 2 decelerates and the behavior sensor 21 detects a longitudinal acceleration equal to or greater than the longitudinal threshold.

[0085] Therefore, the occupant can recognize the inertial force acting on his / her body in the forward / rearward direction and the direction of the inertial force by the change in the light emitting area of ​​any of the floor light emitting devices 41, the pillar light emitting devices 43, and the door light emitting devices 42. This makes it possible to prevent motion sickness. Also, as shown in FIG. 9, the floor light emitting devices 41 and the main rear door light emitting parts 46M are set at positions where they are easily visible even when the occupant sitting in the rear seat 6 is operating a smartphone or the like, so that the occupant can be notified of the acceleration / deceleration of the vehicle 2 more reliably.

[0086] <<Second embodiment>> The motion sickness prevention system 101 according to the second embodiment differs from the first embodiment in that it includes a prediction device 102 (see FIG. 3) which is an acquisition device that acquires behavior information required to predict the behavior of the vehicle 2 and outputs it to the control device 24, instead of the behavior sensor 21, and in the light emission process. Since the rest of the system is the same as the first embodiment, the description will be omitted.

[0087] The prediction device 102 is an output device that acquires behavior information required to predict whether the vehicle 2 will turn, and is configured by a navigation device 103 in this embodiment. The navigation device 103 acquires a route along which the vehicle 2 is scheduled to travel (hereinafter, a planned travel route) based on an input from an occupant. The navigation device 103 also receives a GPS signal from a positioning satellite to acquire the current location of the vehicle 2, and outputs the current location of the vehicle 2 and the planned travel route to the control device 24. However, the present invention is not limited to this embodiment, and the prediction device 102 may include a device other than the navigation device 103. The prediction device 102 may also be configured by a driving assistance system that sets a trajectory along which the vehicle 2 should travel, and autonomously drives the vehicle 2 along the trajectory.

[0088] As shown in Fig. 10, the light emission process according to the second embodiment differs from the first embodiment in that the control device 24 executes ST11 instead of step ST1, and when steps ST2 and ST3 are completed, the control device 24 ends the light emission process. Hereinafter, the light emission process according to the second embodiment will be described in detail with reference to Fig. 10.

[0089] In step ST11, the control device 24 acquires information for predicting whether the vehicle 2 will turn from the prediction device 102, and predicts whether the vehicle 2 will turn after a predetermined time. In this embodiment, the control device 24 acquires the current location of the vehicle 2 and the planned driving route from the navigation device 103, and predicts that the vehicle 2 will turn when a route that turns right or left is set within a predetermined distance range from the current location of the planned driving route, or when there is a curved route portion. However, the distance range used for the prediction is preferably set to a distance range that does not include a road that curves left and a road that curves right at the same time, and is sufficiently smaller than the distance between adjacent intersections. If it is predicted that the vehicle 2 will turn, the control device 24 executes step ST2, and otherwise executes step ST3.

[0090] Next, the operation and effects of the thus configured motion sickness prevention system 101 will be described. In step ST11, the control device 24 predicts whether or not the vehicle 2 will turn. If it is predicted that the vehicle 2 will turn, the control device 24 causes the left and right light emitting devices 26 (the seat back light emitting device 31 and the panel light emitting device 32) to emit light in accordance with the turning direction. More specifically, if it is predicted that the vehicle 2 will turn left, the left and right light emitting devices 26 are caused to emit light so that the light emitting area moves from left to right, and if it is predicted that the vehicle 2 will turn right, the left and right light emitting devices 26 are caused to emit light so that the light emitting area moves from right to left.

[0091] This allows the occupant to recognize in advance the presence or absence of a turning behavior of the vehicle 2 before lateral acceleration occurs, by the light emitted by the left and right light-emitting devices 26. Furthermore, when a turning behavior is predicted, the occupant can recognize the turning direction by the moving direction of the light-emitting areas of the left and right light-emitting devices 26. In other words, the occupant can predict the inertial force acting on his or her body before the vehicle 2 turns, which further prevents motion sickness.

[0092] <<Third embodiment>> The motion sickness prevention system 201 of the third embodiment differs from the first embodiment in that in ST5, the movement speed of the light-emitting area is set for each of the front and rear light-emitting devices 27. Since the other configurations are the same as those of the first embodiment, a description of the other configurations will be omitted.

[0093] When longitudinal acceleration is detected by the behavior sensor 21 in step ST5, the control device 24 causes the front and rear light emitting devices 27 (floor light emitting device 41, pillar light emitting device 43, and door light emitting device 42) to emit light so that the light emitting area moves in the direction opposite to the direction of the longitudinal acceleration detected by the behavior sensor 21, as in the first embodiment.

[0094] However, when the magnitude of the longitudinal acceleration acquired by the behavior sensor 21 is equal to or less than a predetermined threshold value (hereinafter, the auxiliary longitudinal threshold value) that is greater than the longitudinal threshold value, the control device 24 sets the movement speed of the light-emitting area to be equal for all front and rear light-emitting devices 27 that emit light, and to be proportional to the longitudinal acceleration.

[0095] When the longitudinal acceleration acquired by the behavior sensor 21 is greater than the auxiliary longitudinal threshold, the control device 24 sets the movement speed of the light emitting area in the front / rear light emitting device 27 located on the side of the rear seat 6 to be proportional to the longitudinal acceleration, similar to the case where the acceleration is equal to or less than the auxiliary longitudinal threshold. However, the control device 24 sets the movement speed of the light emitting area in front of and to the side of the front seat 5 (driver) to be slightly faster than the side of the rear seat 6.

[0096] More specifically, when the longitudinal acceleration acquired by the behavior sensor 21 is greater than the auxiliary longitudinal threshold, the control device 24 sets the moving speeds of the light-emitting areas of the rear door light-emitting device 46 and the floor light-emitting device 41 to be equal and proportional to the longitudinal acceleration, and sets the moving speeds of the light-emitting areas of the pillar light-emitting device 43 and the front door light-emitting device 45 to be higher than the moving speed of the light-emitting area of ​​the rear door light-emitting device 46 (or the floor light-emitting device 41).

[0097] Next, the effects of the thus configured motion sickness prevention system 201 will be described. The front door light emitting device 45 corresponds to the front door light emitting device provided on the door trim 15 located to the side of the seat (front seat 5) located in the front row on the floor 4, and is located to the side of the driver's seat. The pillar light emitting device 43 is also located in front of the driver's seat, and both are easily visible to the driver.

[0098] When the longitudinal acceleration of the vehicle 2 is greater than the auxiliary longitudinal threshold, the moving speed of the light emitting areas of the pillar light emitting device 43 and the front door light emitting device 45 is higher on the side of the front seat 5 than on the side of the rear seat 6. As a result, when the vehicle 2 accelerates to a longitudinal acceleration equal to or greater than the auxiliary longitudinal threshold, the driver recognizes that the acceleration is greater than the actual longitudinal acceleration and decelerates the vehicle 2, so that the driver can be encouraged not to accelerate too much, thereby improving the safety of the vehicle 2. On the other hand, in the rear door light emitting device 46 on the side of the passenger seated in the rear seat 6 and the floor light emitting device 41 in front of the front seat 5 and the rear seat 6 constituting the passenger seat, the moving speed of the light emitting area is determined according to the longitudinal acceleration. As a result, the passenger seated in the rear seat 6 can recognize the longitudinal acceleration more accurately, thereby preventing motion sickness.

[0099] Although the description of the specific embodiment is finished above, the present invention is not limited to the above embodiment and can be modified in a wide range of ways. In the above embodiment, the light-emitting areas of the left and right light-emitting devices 26 and the front and rear light-emitting devices 27 are configured to move according to the behavior of the vehicle 2, but the present invention is not limited to this embodiment and may be any embodiment as long as the distribution and form of the light-emitting areas change according to the behavior of the vehicle 2.

[0100] The light-emitting devices 22 may each include multi-color light-emitting LEDs arranged in the extension direction, and the control device 24 may be configured to change the light emission color of the light-emitting devices 22 according to the direction of acceleration of the vehicle 2. As shown in Fig. 11, the control device 24 may control each of the light-emitting devices 22 so that the light-emitting elements are sequentially illuminated from one side to the other side, and after all the light-emitting elements have illuminated, all the light-emitting elements are temporarily turned off, and the light-emitting elements are sequentially illuminated again from one side to the other side.

[0101] In the above third embodiment, the movement speed of the light-emitting area was set for each of the front and rear light-emitting devices 27, but this is not limited to this, and the dynamic change speed of the distribution of the light-emitting areas of the light-emitting devices 22 may be set for each of the front and rear light-emitting devices 27.

[0102] In the second embodiment, the prediction device 102 is a navigation device 103 or an advanced driving assistance system, but is not limited to this aspect. The prediction device 102 may be any device for predicting the behavior of the vehicle 2, and may include, for example, a road sensor that detects unevenness on the road surface in the traveling direction. Based on the unevenness detected by the road sensor, the control device 24 may predict the vertical acceleration of the vehicle 2, and may light up the light-emitting device 22 (more specifically, the pillar light-emitting device 43) extending in the vertical direction to notify the occupant of the predicted vertical acceleration.

[0103] In the above first to third embodiments, two rows of seats, the front seat 5 and the rear seat 6, are arranged in the vehicle interior, but the present invention is not limited to this. Three or more rows of seats may be arranged in the vehicle interior. For example, when three rows of seats, the front seat 5, the mid seat, and the rear seat 6, are arranged in the vehicle interior, the front seat 5 constitutes a front row seat provided in front of the mid seat, and the mid seat provided behind the front seat 5 constitutes a rear row seat. Similarly, the mid seat constitutes a front row seat provided in front of the rear seat 6, and the rear seat 6 constitutes a rear row seat provided behind the mid seat.

[0104] The backs of the front seats 5 and the mid seats constituting the front row seats are provided with the seat back light emitting device 31 and the auxiliary light emitting device 28, respectively. The floor light emitting device 41 is provided between the front seats and the rear seats, that is, between the front seats 5 and the mid seats of the floor 4, between the mid seats and the rear seats 6, and in front of the front seats 5 constituting the passenger seat. When three rows of seats are provided in the vehicle interior, and the door light emitting devices 42 are provided to extend in the front and rear directions on the sides of the front seats 5, the mid seats, and the rear seats 6, the control device 24 may set the moving speed of the light emitting area of ​​the door light emitting devices 42 to be higher on the sides of the front seats 5 (driver) than when it is proportional to the acceleration, and to be slightly higher than on the sides of the mid seats and the rear seats 6.

[0105] The locations where the left and right light emitting devices 26 and the front and rear light emitting devices 27 are provided are not limited to those in the first to third embodiments. For example, the left and right light emitting devices 26 may include a front light emitting device 203 (see FIG. 1 and FIG. 5) provided on the upper part of the windshield 17 of the ceiling 202 so as to extend in the left and right direction along the upper edge of the windshield 17, and the front and rear light emitting devices 27 may include a roof light emitting device 204 extending in the front and rear direction along both the left and right edges of the ceiling 202 that define the upper edge of the passenger compartment 3. In this case, the front light emitting device 203 and the roof light emitting device 204 may also function as illumination for the passenger compartment 3. In addition, the front and rear light emitting devices 27 may include a trim lower edge light emitting device 205 (see FIG. 9) provided on the lower edges of the door trims 15 and 16, and the trim lower edge light emitting device 205 may function as a courtesy lamp that illuminates the feet of occupants when they get on and off the vehicle 2.

[0106] In the above embodiment, the floor light emitting device 41 is also provided in front of the front seat 5 constituting the passenger seat, but this is not limited to the embodiment, and the floor light emitting device 41 may be provided only in the portion of the floor 4 between the front seat 5 and the rear seat 6. Also, the floor light emitting device 41 may be provided in front of all the front seats 5. In the third embodiment, when the floor light emitting device 41 is provided in front of the front seat 5 constituting the driver's seat and the longitudinal acceleration is greater than the auxiliary longitudinal threshold, the control device 24 may set the moving speed of the light emitting region to be higher than that of the front / rear light emitting device 27 located on the side of the rear seat 6.

[0107] In the first embodiment described above, when the acceleration sensor 21A detects acceleration in the left direction, the control device 24 causes the light-emitting elements of the left and right light-emitting devices 26 including the seatback light-emitting device 31 to blink or emit light in sequence from left to right, and when the acceleration sensor 21A detects acceleration in the right direction, the control device 24 causes the light-emitting elements of the left and right light-emitting devices 26 including the seatback light-emitting device 31 to blink or emit light in sequence from right to left, but the order of blinking or emitting light of the left and right light-emitting elements is not limited to this. The order of emitting light of the light-emitting elements of the left and right light-emitting devices 26 may be in any order as long as the occupant can recognize either the direction of the acceleration or the direction of the inertial force.

[0108] Specifically, when the acceleration sensor 21A detects acceleration in the left direction (for example, when the vehicle 2 turns left), the control device 24 may cause at least one of the light-emitting elements 31A of the seat back light-emitting device 31 and the light-emitting elements 32A of the panel light-emitting device 32 to blink (or emit light) in sequence from right to left, and when the acceleration sensor 21A detects acceleration in the right direction (for example, when the vehicle 2 turns right), the control device 24 may cause at least one of the light-emitting elements 31A of the seat back light-emitting device 31 and the light-emitting elements 32A of the panel light-emitting device 32 to blink (or emit light) in sequence from left to right. This allows the occupant to recognize the direction of acceleration by the change in the light-emitting area of ​​at least one of the seat back light-emitting device 31 and the panel light-emitting device 32, and to prepare in advance for the inertial force caused by the acceleration. This makes it possible to prevent motion sickness.

[0109] Similarly, in the above second embodiment, when the control device 24 predicts that the vehicle 2 will turn left based on the route acquired by the navigation device 103, the control device 24 causes the left and right light-emitting devices 26 to emit light so that the light-emitting areas move from left to right, and when the control device 24 predicts that the vehicle 2 will turn right, the control device 24 causes the left and right light-emitting devices 26 to emit light so that the light-emitting areas move from right to left, but the direction in which the light-emitting areas move is not limited to this. Specifically, when the control device 24 predicts that the vehicle 2 will turn left, the control device 24 may cause the left and right light-emitting devices 26 to emit light so that the light-emitting areas move from right to left, and when the control device 24 predicts that the vehicle 2 will turn right, the control device 24 may cause the left and right light-emitting devices 26 to emit light so that the light-emitting areas move from left to right.

[0110] In addition, in the above embodiment, when forward acceleration is detected by the acceleration sensor 21A, the control device 24 causes the light-emitting elements of the front and rear light-emitting devices 27 to flash or emit light in sequence from front to back, and when backward acceleration is detected, the control device 24 causes the light-emitting elements of the front and rear light-emitting devices 27 to flash or emit light in sequence from back to front. However, the light-emitting order of the light-emitting elements of the front and rear light-emitting devices 27 may be in any order as long as the occupant can recognize either the direction of the acceleration or the direction of the inertial force.

[0111] Specifically, when the acceleration sensor 21A detects acceleration in the forward direction (i.e., when the vehicle 2 accelerates), the control device 24 causes at least one of the light emitting element 41A of the floor light emitting device 41, the light emitting element 42A of the door light emitting device 42, and the light emitting element 43A of the pillar light emitting device 43 to blink (or emit light) in sequence from back to front, and when the acceleration in the backward direction is detected (i.e., when the vehicle 2 decelerates), the control device 24 causes at least one of the light emitting element 41A of the floor light emitting device 41, the light emitting element 42A of the door light emitting device 42, and the light emitting element 43A of the pillar light emitting device 43 to blink (or emit light) in sequence from front to back. This allows the passenger to recognize the direction of acceleration by the change in the light emitting area of ​​the front and rear light emitting device 27, and to prepare in advance for the inertial force caused by the acceleration. Therefore, motion sickness can be prevented. [Explanation of symbols]

[0112] 1: Motion sickness prevention system according to the first embodiment 2: Vehicle 4: Floor 5: Front seats (front row seats) 6: Rear seat (back row seat) 9: Seat back 15: Door trim 16: Door trim 18: Front pillar 21: Behavior sensor (acquisition device) 21A: Acceleration sensor 22: Light emitting device 24: Control device 31: Seat back light emitting device 31A: Light emitting element 41: Floor lighting device 42: Door light emitting device 43: Pillar light emitting device 46: Rear door light emitting device 101: Motion sickness prevention system according to the second embodiment 103: Navigation device (acquisition device) 201: Motion sickness prevention system according to the third embodiment

Claims

[Claim 1] A motion sickness prevention system installed in a vehicle having a front row seat and a rear row seat arranged side by side on a floor, comprising: An acquisition device for acquiring behavior information relating to a behavior of the vehicle; a seat back light emitting device extending in a vehicle width direction on a rear surface of the seat back of the front row seat and capable of emitting light in a plurality of areas aligned in the extending direction; A control device that controls the seat back light emitting device; a pillar light emitting device that extends in the front-rear direction along the front pillar and is capable of emitting light in a plurality of regions aligned along the extending direction; a door light emitting device extending in the front-rear direction in a door trim located on a side of the rear row seat and capable of emitting light in a plurality of areas aligned along the extending direction, the acquisition device includes an acceleration sensor that detects an acceleration of the vehicle; The control device determines whether or not a turning behavior of the vehicle is occurring based on the behavior information acquired by the acquisition device, and when it is determined that the turning behavior is occurring, dynamically changes a distribution of light-emitting areas along an extension direction of the seat back light-emitting device in a manner corresponding to the turning behavior; the control device dynamically changes a distribution of the light emitting areas of the seat back light emitting devices along an extending direction of the seat back light emitting devices in response to the lateral acceleration detected by the acceleration sensor; the control device dynamically changes a distribution of the light emitting areas of the pillar light emitting devices and a distribution of the light emitting areas of the door light emitting devices in a longitudinal direction in a manner corresponding to the longitudinal acceleration of the vehicle detected by the acceleration sensor; A motion sickness prevention system in which the rate of change of the light emitting area of ​​the pillar light emitting device is set higher than that of the door light emitting device.

Images