Vehicle control method and display device

Abstract

To enable an occupant to view images with a display installed in a vehicle and suppress car sickness of the occupant.SOLUTION: A vehicle includes a display disposed between a rear seat and a front seat. When a first condition is satisfied, the display displays an image in a first size in a manner that a center of the image is located at a first position. When a second condition different from the first condition is satisfied, the display displays the image in a second size smaller than the first size in a manner that the center of the image is located at a second position.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to a vehicle control method and a display device. [Background technology]

[0002] It is known that watching videos or the like inside a vehicle can easily cause car sickness. Patent Document 1 discloses a vehicle control system that includes an automatic driving control unit that executes automatic driving by automatically controlling at least one of the speed control and steering control of the vehicle, a display unit that displays content, and a display control unit that changes content that can be displayed during automatic driving according to the behavior of the vehicle when automatic driving is being executed by the automatic driving control unit, and displays the content on the display unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-76027 A [Patent Document 2] JP 2015-141099 A Summary of the Invention [Problem to be solved by the invention]

[0004] Viewing images displayed on a large display installed inside a vehicle can make people more susceptible to car sickness. However, there is a need to be able to view images on a display inside the vehicle.

[0005] An object of the present disclosure is to provide a technology that allows occupants to watch videos on a display installed inside the vehicle and suppresses car sickness in the occupants. [Means for solving the problem]

[0006] One aspect of the present disclosure is A first wheel connected to the vehicle body; A second wheel connected to the vehicle body; A third wheel connected to the vehicle body; and a fourth wheel connected to the vehicle body. A vehicle capable of running in a predetermined direction using the first wheel, the second wheel, the third wheel, and the fourth wheel, The vehicle body is A floor surface portion and a ceiling surface portion arranged along the predetermined direction; a left side surface portion that connects the floor surface portion and the ceiling surface portion and is disposed on the left side along the predetermined direction; a right side surface portion that connects the floor surface portion and the ceiling surface portion and is disposed on the right side along the predetermined direction; a front surface portion that connects the floor surface portion and the ceiling surface portion and is disposed in a front portion with respect to the predetermined direction; A rear surface portion that connects the floor surface portion and the ceiling surface portion and is disposed at the rear with respect to the predetermined direction; At least one front seat arranged on the floor surface portion closer to the front surface portion than the rear surface portion; At least one rear seat disposed on the floor surface portion toward the rear surface portion from the front surface portion; A display disposed between the rear seat and the front seat. A vehicle control method for the vehicle, comprising: When a first condition is satisfied, the display displays an image with a first size and with a center of the image at a first position; When a second condition different from the first condition is satisfied, the display displays the image with a center of the image at a second position and with a second size smaller than the first size. A method for controlling a vehicle is provided.

[0007] One aspect of the present disclosure is A first wheel connected to the vehicle body; A second wheel connected to the vehicle body; A third wheel connected to the vehicle body; and a fourth wheel connected to the vehicle body. A display device configured to be mounted on a vehicle capable of traveling in a predetermined direction using the first wheel, the second wheel, the third wheel, and the fourth wheel, The vehicle body is A floor surface portion and a ceiling surface portion arranged along the predetermined direction; a left side surface portion that connects the floor surface portion and the ceiling surface portion and is disposed on the left side along the predetermined direction; a right side surface portion that connects the floor surface portion and the ceiling surface portion and is disposed on the right side along the predetermined direction; a front surface portion that connects the floor surface portion and the ceiling surface portion and is disposed in a front portion with respect to the predetermined direction; A rear surface portion that connects the floor surface portion and the ceiling surface portion and is disposed at the rear with respect to the predetermined direction; At least one front seat arranged on the floor surface portion closer to the front surface portion than the rear surface portion; At least one rear seat disposed on the floor surface portion toward the rear surface portion from the front surface portion; a display disposed between the rear seat and the front seat, When a first condition is satisfied, the display displays an image with a first size and with a center of the image at a first position; When a second condition different from the first condition is satisfied, the display displays the image with a center of the image at a second position and with a second size smaller than the first size. A display device is provided.

[0008] Furthermore, these comprehensive or specific aspects may be realized by a system, an apparatus, a method, an integrated circuit, a computer program, or a recording medium, or may be realized by any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium. Effect of the Invention

[0009] According to the present disclosure, occupants can watch images on a display installed inside the vehicle, and occupants can be prevented from becoming car sick. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a plan view showing an example of the configuration of a vehicle according to a first embodiment, with the interior of the vehicle seen from above; [Diagram 2] FIG. 1 is a side view showing an example of the configuration of a vehicle according to a first embodiment, with the interior of the vehicle seen through from the side; [Diagram 3] FIG. 1 shows an example of the configuration of a vehicle according to a first embodiment, as viewed from the rear seat inside the vehicle. [Figure 4] FIG. 1 is a block diagram showing an example of a device provided in a vehicle according to a first embodiment; [Diagram 5] FIG. 1 shows an example of displaying a video in a first display mode on a display according to the first embodiment. [Figure 6] FIG. 13 is a diagram showing an example of displaying an image in a second display mode on the display according to the first embodiment; [Figure 7] FIG. 13 is a diagram showing an example of displaying an image in a third display mode on the display according to the first embodiment; [Figure 8] FIG. 1 is a diagram for explaining a case where an occupant in accordance with the first embodiment issues an instruction to change the display mode of an image; [Figure 9] 1 is a flowchart showing an example of a display process according to the first embodiment. [Figure 10] 10 is a flowchart showing the continuation of the display process shown in FIG. [Figure 11] FIG. 1 is a diagram for explaining an example of a change in the acceleration of a vehicle and a change in the display mode of a display according to the first embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed description of already well-known matters and duplicated description of substantially the same configuration may be omitted. This is to avoid the following description becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. Note that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0012] (Embodiment 1) <Vehicle configuration> FIG. 1 shows a configuration example of a vehicle 1 according to the first embodiment, and is a plan view showing the interior of the vehicle from above. FIG. 2 shows a configuration example of a vehicle 1 according to the first embodiment, and is a side view showing the interior of the vehicle from the side. FIG. 3 shows a configuration example of a vehicle 1 according to the first embodiment, and is a view looking forward from a rear seat 22 inside the vehicle. Next, the configuration of the vehicle 1 will be described with reference to FIG. 1, FIG. 2, and FIG. 3.

[0013] For ease of explanation, as shown in Figures 1 and 2, the overall length direction of the vehicle 1 is the Y axis, the width direction of the vehicle 1 is the X axis, and the height direction of the vehicle 1 is the Z axis. For ease of explanation, the positive direction of the Z axis may be referred to as "up", the negative direction of the Z axis as "down", the positive direction of the Y axis as "front", the negative direction of the Y axis as "rear", the positive direction of the X axis as "right", and the negative direction of the X axis as "left". These expressions relating to directions are used for ease of explanation and are not intended to limit the position of the structure during actual use.

[0014] The vehicle 1 includes a vehicle body 2 and at least a first wheel 3A, a second wheel 3B, a third wheel 3C, and a fourth wheel 3D connected to the vehicle body 2, and can travel in a predetermined direction (for example, the direction of the Y axis) using the first wheel 3A, the second wheel 3B, the third wheel 3C, and the fourth wheel 3D. However, the vehicle 1 is not limited to a configuration including four wheels, and may be a configuration including two or three wheels, or five or more wheels. Furthermore, the vehicle 1 may be a private car, a commercial vehicle, a taxi, a truck, a bus, or the like.

[0015] The vehicle body 2 includes a floor surface portion 11 and a ceiling surface portion 12 arranged along a predetermined direction.

[0016] The vehicle body 2 includes a left side surface portion 13 that connects the floor surface portion 11 and the ceiling surface portion 12 and is disposed on the left side along a predetermined direction, and a right side surface portion 14 that connects the floor surface portion 11 and the ceiling surface portion 12 and is disposed on the right side along a predetermined direction.

[0017] The vehicle body 2 comprises a front surface portion 16 which connects the floor surface portion 11 and the ceiling surface portion 12 and is disposed at the front portion 15 in a predetermined direction, and a rear surface portion 18 which connects the floor surface portion 11 and the ceiling surface portion 12 and is disposed at the rear portion 17 in a predetermined direction.

[0018] The vehicle body 2 has at least one front seat 21 arranged on the floor surface 11 closer to the front surface 16 than the rear surface 18, and at least one rear seat 22 arranged on the floor surface 11 closer to the rear surface 18 than the front surface 16.

[0019] The front portion 16 is provided with a glass windshield 4 that allows the outside of the vehicle to be viewed in a predetermined direction from the front seats 21.

[0020] The vehicle body 2 further includes a rectangular display 100 between the rear seat 22 and the front seat 21. The display 100 can change the light transmittance. Examples of the display 100 include an organic EL display and an LED display. For example, the display 100 has a configuration in which a liquid crystal shutter capable of controlling the light transmittance is arranged over a self-luminous display panel having translucency (for example, an organic EL panel). The display 100 brings the light transmittance of the liquid crystal shutter corresponding to an area to be closer to transparency closer to 100%, and brings the light transmittance of the liquid crystal shutter corresponding to an area to be closer to light-shielding closer to 0%. In this way, the display 100 can bring any area closer to transparency or closer to light-shielding.

[0021] When the display 100 is in a transparent state, a passenger sitting in the rear seat 22 can see the outside of the vehicle through the display 100 and the front window 4.

[0022] Display 100 is set to play a predetermined video. In this embodiment, the video is described as a moving image, but the video may be a still image.

[0023] The vehicle 1 includes a speaker 101 in the rear compartment of the vehicle. The speaker 101 may be disposed below the display 100 as shown in Fig. 3. However, the speaker 101 may be disposed in any position.

[0024] The vehicle 1 is provided with an operation unit 102 near the rear seat 22 inside the vehicle. The operation unit 102 may be a tablet terminal installed inside the vehicle. Alternatively, the operation unit 102 may be a smartphone carried by an occupant connected to the vehicle 1 by wire or wirelessly. Alternatively, the operation unit 102 may be a remote control for operating the IVI device 114 (see FIG. 4). Details of operations that the occupant can perform through the operation unit 109 will be described later.

[0025] 3, passengers in the rear seats 22 can view images displayed on the display 100. However, passengers in the rear seats 22 who view images displayed on the entire surface of the display 100 tend to become car sick when the vehicle 1 is behaving significantly (for example, when the acceleration due to acceleration / deceleration or turning of the vehicle 1 is large) because the images block the forward view outside the vehicle for the passengers in the rear seats 22 who view images displayed on the entire surface of the display 100. In this embodiment, therefore, a technique for suppressing car sickness in passengers in the rear seats 22 by appropriately controlling the display mode of the images on the display 100 will be described.

[0026] <Device configuration> FIG. 4 is a block diagram showing an example of a device provided in the vehicle 1 according to the first embodiment.

[0027] As shown in FIG. 4, the vehicle 1 includes a communication device 111, a vehicle control device 112, a seating detection device 113, an IVI device 114, a video control device 115, an audio control device 116, a display 100, and a speaker 101.

[0028] The communication device 111, the vehicle control device 112, the seating detection device 113, the IVI device 114, the video control device 115, and the audio control device 116 can transmit and receive information to and from each other via an in-vehicle network 110. Examples of the in-vehicle network 110 include a Controller Area Network (CAN), a Local Interconnect Network (LIN), and FlexRay.

[0029] The communication device 111 is a device that performs wireless communication with an external device (e.g., a server) through a predetermined communication network. Examples of the communication network include a mobile communication network (e.g., LTE, 4G, 5G, 6G, etc.), Wi-Fi (registered trademark), Bluetooth (registered trademark), etc.

[0030] The vehicle control device 112 is a device that controls the behavior of the vehicle 1. For example, the vehicle control device 112 controls starting and stopping, acceleration and deceleration, turning, etc. of the vehicle 1. In addition, the vehicle control device 112 provides information indicating the status of starting and stopping, acceleration and deceleration, turning, etc.

[0031] The seating detection device 113 is a device for detecting whether or not an occupant is seated in each seat. For example, the seating detection device 113 may detect whether or not an occupant is seated in the seat by a weight sensor provided in the seat. Alternatively, the seating detection device 113 may detect whether or not an occupant is seated in the seat by whether or not a seat belt of the seat is fastened. Alternatively, the seating detection device 113 may detect whether or not an occupant is seated in the seat by performing a person detection process at the position of the seat from an image captured by a camera installed in the vehicle.

[0032] The IVI device 114 is a device that provides information about the vehicle 1 and entertainment. IVI is an abbreviation for In-Vehicle Infotainment. For example, the IVI device 114 outputs music and video from a car audio, an in-vehicle DVD, a TV tuner, a radio, VOD, or the like. The IVI device 114 may be interpreted as a control unit or an Electronic Control Unit (ECU). The IVI device 114 may also include a processor, a memory, and the like.

[0033] The IVI device 114 searches for and outputs a route to the destination. The IVI device 114 may search for the route to the destination using built-in map data, or may cause an external device to search for the route to the destination via the communication device 111, and may acquire and output the search result. In addition, the route to the destination may be displayed as navigation for the driver, or may be used as an automatic driving plan for the vehicle 1.

[0034] The IVI device 114 cooperates with the video control device 115 to control the video display on the display 100. A method for controlling the video display will be described in detail later. The IVI device 114 cooperates with the audio control device 116 to control the audio output of the speaker 101. A method for controlling the audio output will be described in detail later.

[0035] The video control device 115 controls the video display on the display 100. The video may be either a still image or a moving image. The video control device 115 can also control the light transmittance of any region of the display 100. The video control device 115 may control the display of the video on the display 100 and the transmittance of any region under control of the IVI device 114. The video control device 115 and the display 100 may be collectively referred to as a display device. Alternatively, the IVI device 114, the video control device 115, and the display 100 may be collectively referred to as a display device.

[0036] The audio control device 116 controls the audio output of the speaker 101. The audio control device 116 may control the audio output to the speaker 101 under control of the IVI device 114.

[0037] <First display mode> FIG. 5 is a diagram showing an example in which a video is displayed in the first display mode on the display 100 according to the first embodiment.

[0038] 5, display 100 displays image 200 in a first display mode such that the center of image 200 is located at a first position and the size of image 200 is a first size. The first position may be center C of display 100. The first display mode may be selected when a first condition is satisfied.

[0039] The first condition may be that the acceleration in a predetermined direction in the vehicle 1 is a first magnitude. The first magnitude of the acceleration in the predetermined direction may be a time average magnitude for a predetermined time. The predetermined direction may be at least one of the left-right direction (X-axis direction) of the vehicle 1, the up-down direction (Z-axis direction) of the vehicle 1, or the front-rear direction (Y-axis direction) of the vehicle 1.

[0040] For example, if the time average of acceleration in any one of the left-right, up-down, or front-rear directions of vehicle 1 over a predetermined period of time is a first magnitude (e.g., a magnitude equal to or less than threshold value β), the first condition is satisfied, and display 100 displays image 200 so that the center of image 200 is at a first position and the size of image 200 is the first size. The first position may be the position of center C of display 100, and the first size of image 200 may be the maximum size at which display 100 can display an image. However, the first position and first size of image 200 are not limited to these.

[0041] Furthermore, the display 100 may set the light transmittance of the display area of ​​the image 200 to less than a predetermined threshold (eg, non-transmitting) as the first display mode.

[0042] As a result, when the acceleration acting in any direction of the vehicle 1 is sufficiently small so that the passengers in the rear seats 22 are unlikely to get car sick, the passengers in the rear seats 22 can view the image 200 displayed large on the display 100.

[0043] <Second display mode> FIG. 6 is a diagram showing an example in which a video is displayed in the second display mode on display 100 according to the first embodiment.

[0044] As shown in FIG. 6, display 100 displays image 200 in a second display mode such that the center of image 200 is located at a second position and the size of image 200 is a second size smaller than the first size. For example, the area of ​​image 200 in the second size may be 1 / 4 to 1 / 16 times the area of ​​image 200 in the first size. The second position may be to the left or right of the first position. However, in the second display mode, the second position may be the same as the first position. The second display mode may be selected when a second condition different from the first condition is satisfied.

[0045] In addition, display 100 may display the image as a second display mode such that the center of image 200 is located at a third position and the size of image 200 is a third size smaller than the first size. For example, the area of ​​image 200 at the third size may be 1 / 4 to 1 / 16 times the area of ​​image 200. When the second position is to the left of the first position, the third position may be to the right of the first position. When the second position is to the right of the first position, the third position may be to the left of the first position. Note that the second position and / or the third position may be below the first position.

[0046] The second position (or the third position) may be determined in accordance with the seating position of the occupant in the rear seat 22. The seating position of the occupant is detected by the seating detection device 113. The seating detection device 113 may be read as a seating position detection circuit.

[0047] The second condition may be that the acceleration in a predetermined direction in the vehicle 1 is a second magnitude greater than the first magnitude. The second magnitude of the acceleration in the predetermined direction may be a time average magnitude for a predetermined time. The predetermined direction may be at least one of the left-right direction (X-axis direction) of the vehicle 1, the up-down direction (Z-axis direction) of the vehicle, or the front-rear direction (Y-axis direction) of the vehicle. In addition, the second condition may be that the route along which the vehicle 1 is scheduled to travel satisfies a specific condition.

[0048] For example, if the time average of the acceleration applied to the vehicle 1 in any of the left-right, up-down, or front-back directions for a predetermined time is a second magnitude greater than the first magnitude, the second condition is satisfied, and the display 100 displays the image 200 whose center is at the second position and whose size is the second size, and / or the image 200 whose center is at the third position and whose size is the third size. The second position may be the lower left position of the display 100, and the third position may be the lower right position of the display 100. Alternatively, the second position may be the lower right position of the display 100, and the third position may be the lower left position of the display 100. In addition, since the image 200 of the second size and the image 200 of the third size are smaller than the image 200 of the first size, they may be referred to as reduced images in this embodiment.

[0049] When it is detected that an occupant is seated in the left rear seat 22A, the display 100 may display the reduced image 201A at the lower left position. For example, the display 100 may display the reduced image 201A so that the central axis 210A (dotted line) of the width (width in the X-axis direction) of the left rear seat 22A becomes the central axis of the width of the reduced image 201A.

[0050] When it is detected that an occupant is seated in the right rear seat 22B, the display 100 displays the reduced image 201B at the lower right position. For example, the display 100 may display the reduced image 201B so that the central axis 210B (dashed line) of the width (width in the X-axis direction) of the right rear seat 22B becomes the central axis of the width of the reduced image 201B.

[0051] In addition, as a second display mode, display 100 may have a higher light transmittance (e.g., transparent) in the area where reduced images 201A and / or 201B are not displayed than the light transmittance in the area where reduced images 201A and / or 201B are displayed.

[0052] As a result, when the acceleration of the vehicle 1 in any direction is considerably large and therefore there is a high possibility that the passengers in the rear seats 22 will become car sick, the passengers in the rear seats 22 can view the reduced images 201A and / or 201B displayed on the display 100 while facing forward, making them less likely to become car sick compared to the first display mode. Also, since the areas of the display 100 where the reduced images 201A and / or 201B are not displayed are transparent, the passengers in the rear seats 22 do not have an obstructed view of the front outside the vehicle (i.e., they can see the scenery ahead through the front window 4), making them less likely to become car sick compared to the first display mode.

[0053] Furthermore, reduced image 201A displayed at the lower left position of display 100 may be reduced so as to overlap with left front seat 21A. Similarly, reduced image 201B displayed at the lower right position of display 100 may be reduced so as to overlap with right front seat 21B. This allows passengers in rear seats 22 to see the scenery ahead by looking through the transparent area of ​​display 100 that does not overlap with front seat 21 and through front window 4, making them less likely to get car sick.

[0054] If the second condition is satisfied, the display 100 may display information indicating that the image has been intentionally reduced when switching to the second display mode, so that the passengers in the rear seat 22 can know the reason why the image 200 has been reduced.

[0055] <Third display mode> FIG. 7 is a diagram showing an example in which a video is displayed on display 100 according to the first embodiment in the third display mode.

[0056] 7, in the third display mode, the display 100 displays the image 200 in the same manner as in the second display mode described above, and displays the area in which the image 200 is not displayed as an image of a predetermined color tone and / or brightness (hereinafter, referred to as background image 202) without making it transparent. The predetermined color tone may be the average color tone of all pixels of the image 200. The predetermined brightness may be the average brightness of all pixels of the image 200.

[0057] The third display mode may be selected when a third condition different from the first condition or the second condition is satisfied. The third condition may be that the acceleration in a predetermined direction in the vehicle 1 is a third magnitude between the first magnitude and the second magnitude. The third magnitude of the acceleration in the predetermined direction may be a time average magnitude for a predetermined time. The predetermined direction may be at least one of the left-right direction of the vehicle 1, the up-down direction of the vehicle 1, or the front-rear direction of the vehicle 1.

[0058] For example, if the time average of the acceleration applied to vehicle 1 is a third magnitude between the first magnitude and the second magnitude, it is determined that the third condition is satisfied, and display 100 displays image 200 whose center is at the second position and whose size is the second size, and / or image 200 whose center is at the third position and whose size is the third size. Furthermore, display 100 displays background image 202 of a color tone and / or brightness matching image 200 in an area where image 200 is not displayed.

[0059] As a result, when the acceleration applied to the vehicle 1 in any direction is relatively large and therefore the possibility of the passenger in the rear seat 22 becoming car sick is moderate, the passenger in the rear seat 22 can view the reduced images 201A and / or 201B displayed on the display 100 while facing forward, making the passenger less likely to become car sick compared to the first display mode. Also, in the area of ​​the display 100 where the reduced images 201A and / or 201B are not displayed, the background image 202 with a color tone and / or brightness matching the image 200 is displayed, so that the passenger in the rear seat 22 can feel more immersed in the image 200 compared to the second display mode.

[0060] It should be noted that the vehicle 1 does not necessarily need to implement all of the first display mode, the second display mode, and the third display mode, but only needs to implement at least one of the first display mode, the second display mode, and the third display mode.

[0061] <Changes to image size, etc.> FIG. 8 is a diagram for explaining a case where a passenger according to the first embodiment issues an instruction to change the display mode of the image 200. In FIG.

[0062] Through the operation unit 109, the passenger can switch between displaying and hiding the image 200, change the display position of the image 200 up, down, left, or right, or change the display size of the image 200, etc.

[0063] For example, when the second or third display mode is selected, an occupant in the left rear seat 22A can enlarge the reduced image 201A displayed in the lower left position to half the width of the display 100 while maintaining the aspect ratio.

[0064] For example, when the second or third display mode is selected, an occupant in the right rear seat 22B can enlarge the reduced image 201B displayed in the lower right position to half the width of the display 100 while maintaining the aspect ratio.

[0065] <Processing flow> Next, a method for switching between the above-mentioned first display mode, second display mode, and third display mode will be described.

[0066] FIG. 9 is a flowchart illustrating an example of the display process according to the first embodiment.

[0067] The IVI device 114 determines whether or not a route to a destination has been set (S101).

[0068] If a route to the destination has been set (S101: YES), the IVI device 114 acquires the current position and speed of the vehicle 1 (S102). The current position of the vehicle 1 may be measured by Global Navigation Satellite Systems (GNSS). The current speed of the vehicle 1 may be provided by the vehicle control device 112. The IVI device 114 calculates an acceleration predicted to be applied to the vehicle 1 in a certain period of time from the position and speed acquired in step S101 and the future route (S103). Then, the process proceeds to step S105.

[0069] If the route to the destination has not been set (S101: NO), the IVI device 114 acquires the speed and / or acceleration of the vehicle 1 for a certain period of time in the past (i.e., the past history) (S104). Then, the process proceeds to step S105.

[0070] The IVI device 114 determines whether the video 200 is being displayed on the display 100 (S105).

[0071] If the video 200 is not being displayed on the display 100 (S105: NO), the process returns to step S101.

[0072] If the video 200 is being displayed on the display 100 (S105: YES), the process proceeds to step B shown in FIG. 10, which will be described later.

[0073] FIG. 10 is a flowchart showing a continuation of the display process shown in FIG.

[0074] The IVI device 114 determines whether the average acceleration for a certain period of time in the future calculated in step S103 of Fig. 9 or the average acceleration for a certain period of time in the past acquired in step S104 of Fig. 9 is greater than a threshold value α (i.e., the average acceleration is a first magnitude) (S111). That is, it determines whether it is predicted that a considerably large acceleration will be applied to the vehicle 1 in a certain period of time in the future based on the future route.

[0075] Next, a case where it is determined that the acceleration is greater than the threshold value α (S111: YES) will be described. In this case, the IVI device 114 selects the second display mode described above and performs, for example, the following process.

[0076] The IVI device 114 displays a caption on the display 100 to inform the user that the video will be reduced and displayed individually (S112). Note that the IVI device 114 may output a voice message to that effect from the speaker 101 instead of or in addition to the caption.

[0077] The IVI device 114 acquires the seating state of the rear seat 22 through the seating detection device 113 (S113). That is, the IVI device 114 detects the rear seat 22 in which an occupant is seated.

[0078] The IVI device 114 controls the display 100 via the video control device 115 so that the area other than the area where the video 200 is displayed becomes transparent (that is, has a predetermined transmittance or higher) (S114).

[0079] The IVI device 114 displays, via the image control device 115, reduced-size image 201A and / or 201B on the display 100 in a position in front of the rear seat 22 in which the passenger is seated (S115). For example, when a passenger is seated in the left rear seat 22A, the IVI device 114 displays reduced-size image 201A on the lower left side of the display 100, and when a passenger is seated in the right rear seat 22B, the IVI device 114 displays reduced-size image 201B on the lower right side of the display 100.

[0080] As a result, the image 200 is displayed on the display 100 in the second display mode described above, thereby preventing passengers in the rear seats 22 from becoming car sick in the event that the vehicle 1 is subjected to a significant acceleration on the upcoming route.

[0081] When the occupant operates the operation unit 102, the IVI device 114 changes the display of the reduced images 201A and / or 201B based on the operation content (S140). For example, the reduced images 201A and / or 201B are enlarged or reduced, the display position of the reduced images 201A and / or 201B is changed, or the reduced images 201A and / or 201B are displayed or hidden. Then, the process returns to step A shown in FIG. 9.

[0082] Next, a case where the acceleration is equal to or smaller than the threshold value α (S111: NO) will be described.

[0083] The IVI device 114 determines whether the average acceleration for a certain period of time in the future calculated in step S103 of Fig. 9 or the average acceleration for a certain period of time in the past acquired in step S104 of Fig. 9 is greater than a threshold value β (where β<α) (i.e., the acceleration is a third magnitude) (S121). That is, it determines whether a medium level of acceleration is predicted to be applied to the vehicle 1 in a certain period of time in the future based on the future route.

[0084] Next, a case where it is determined that the acceleration is greater than the threshold value β (S121: YES) will be described. In this case, the IVI device 114 selects the third display mode described above and performs, for example, the following process.

[0085] The IVI device 114 displays a caption on the display 100 to inform the user that the video will be reduced and displayed individually (S122). Note that the IVI device 114 may output a voice message to that effect from the speaker 101 instead of or in addition to the caption.

[0086] The IVI device 114 acquires the seating state of the rear seat 22 through the seating detection device 113 (S123).

[0087] The IVI device 114 controls the display 100 through the video control device 115 so that the entire surface is light-shielded (that is, has a transmittance less than a predetermined value) (S124).

[0088] The IVI device 114 displays the reduced images 201A and / or 201B on the display 100 at a position in front of the rear seat 22 where the passenger is seated, via the image control device 115. In addition, the IVI device 114 displays the background image 202, whose color tone and / or brightness match the image 200, on the display 100 via the image control device 115 (S125). Then, the process proceeds to step S115 described above.

[0089] As a result, the image 200 is displayed on the display 100 in the third display mode described above, so that when the vehicle 1 is subjected to moderate acceleration on the upcoming route, it is possible to both prevent the passengers in the rear seat 22 from getting carsick and allow them to feel immersed in the image 200.

[0090] Next, a case where it is determined that the average acceleration is equal to or less than the threshold value β (S121: NO) will be described. In this case, the IVI device 114 selects the first display mode described above and performs, for example, the following process.

[0091] The IVI device 114 displays a caption on the display 100 to inform the user that the image will be restored to its original size (for example, maximum size) (S131). Note that the IVI device 114 may output a voice message to that effect from the speaker 101 instead of or in addition to the caption.

[0092] The IVI device 114 controls the display 100 through the video control device 115 so that the entire surface is light-shielded (that is, has a transmittance less than a predetermined value) (S132).

[0093] The IVI device 114 returns the image 200 to its original size (for example, maximum size) via the image control device 115 and displays it on the display 100 (S133). Then, the process returns to step A shown in FIG.

[0094] As a result, the image 200 is displayed on the display 100 in the first display mode described above, thereby enhancing the sense of immersion of the passengers in the rear seat 22 in the image 200 when the acceleration applied to the vehicle 1 on the upcoming route is sufficiently small.

[0095] 9 and 10 may be omitted. For example, steps S121 to S125 may be omitted. In this case, if the determination result of step S111 is NO, the process may proceed to step S131.

[0096] <Example of change in acceleration and change in display mode> FIG. 11 is a diagram for explaining an example of a change in the acceleration of the vehicle 1 and a change in the display mode of the display 100 according to the first embodiment.

[0097] For example, it is assumed that the route shown in FIG. 11 is set for the vehicle 1.

[0098] When the IVI device 114 predicts that the vehicle 1 will travel along the route R1 in the future and estimates that the average acceleration during a certain period T1 during which the vehicle 1 travels along the route R1 is 0.2 G (acceleration 0.2 G<threshold β), the IVI device 114 selects the first display mode. This allows the passenger in the rear seat 22 to view the image 200 displayed large on the display 100 during the certain period T1 when the acceleration is relatively small and therefore the possibility of car sickness is relatively low. In other words, the display 100 can provide the image 200 with a high immersive feeling.

[0099] When the vehicle 1 continues to travel, the IVI device 114 predicts that the vehicle 1 will travel along route R2 and estimates that the average acceleration during a certain period T2 during which the vehicle 1 travels along route R2 is 0.3 G (threshold β≦acceleration 0.3 G<threshold α), the third display mode is selected. This allows the passenger in the rear seat 22 to face forward and view the reduced images 201A and / or 201B while perceiving the background image 202 with a color tone and / or brightness that matches the image 200 during the certain period T2 in which the acceleration is moderate and therefore the possibility of car sickness is moderate. In other words, the display 100 can achieve both suppression of car sickness and a sense of immersion in video viewing.

[0100] When the vehicle 1 continues to travel, the IVI device 114 predicts that the vehicle 1 will travel along route R3 and estimates that the average acceleration during a certain period T3 during which the vehicle 1 travels along route R3 is 0.4 G (acceleration 0.4 G≧threshold α), the second display mode is selected. This allows the passenger in the rear seat 22 to face forward and view the reduced images 201A and / or 201B while feeling the scenery outside the vehicle through the transparent area of ​​the display 100 during the certain period T3 when the acceleration is relatively high and therefore the possibility of car sickness is relatively high. In other words, the display 100 can simultaneously suppress car sickness and provide video viewing.

[0101] The IVI device 114 may calculate a predicted value of the average acceleration in each section of the route based on traffic lights and stop lines installed on the route, the radius of curvature of curves on the route, the legal speed limit on the route, and / or the driving characteristics of the vehicle 1. In addition, by using the average acceleration, frequent changes in conditions due to small changes in acceleration are suppressed.

[0102] (Summary of the first embodiment) The above description of the first embodiment discloses the following techniques.

[0103] <Technology 1> The vehicle 1 has at least a first wheel 3A connected to a vehicle body 2, a second wheel 3B connected to the vehicle body 2, a third wheel 3C connected to the vehicle body 2, and a fourth wheel 3D connected to the vehicle body 2, and is capable of running in a predetermined direction using the first wheel 3A, the second wheel 3B, the third wheel 3C, and the fourth wheel 3D. The vehicle body 2 comprises a floor surface portion 11 and a ceiling surface portion 12 arranged along the specified direction, a left side portion 13 connecting the floor surface portion 11 and the ceiling surface portion 12 and arranged on the left side along the specified direction, a right side portion 14 connecting the floor surface portion 11 and the ceiling surface portion 12 and arranged on the right side along the specified direction, a front surface portion 16 connecting the floor surface portion 11 and the ceiling surface portion 12 and arranged in a front portion 15 with respect to the specified direction, a rear surface portion 18 connecting the floor surface portion 11 and the ceiling surface portion 12 and arranged in a rear portion 17 with respect to the specified direction, at least one front seat 21 arranged on the floor surface portion 11 closer to the front surface portion 16 than the rear surface portion 18 side, at least one rear seat 22 arranged on the floor surface portion 11 closer to the rear surface portion 18 than the front surface portion 16, and a display 100 arranged between the rear seat 22 and the front seat 21. As a vehicle control method in the vehicle 1, when a first condition is satisfied, the display 100 displays the image 200 at a first size with the center of the image at a first position, and when a second condition different from the first condition is satisfied, the display 100 displays the image 200 (e.g., reduced images 201A and / or 201B) at a second size smaller than the first size with the center of the image at a second position. This allows the display 100 to display images in an appropriate manner according to the conditions, enabling passengers in the rear seat 22 to view images while preventing car sickness.

[0104] <Technology 2> In the vehicle control method described in Technique 1, the second position is to the left of the first position, or the second position is to the right of the first position. As a result, when the second condition is met, the image is displayed to the left or right of the first position, so that the passenger in the rear seat 22 can view the image while facing more forward. This makes it possible to further prevent the passenger in the rear seat 22 from getting car sick.

[0105] <Technology 3> In the vehicle control method described in Technology 1 or 2, the first condition is that the acceleration in a predetermined direction in the vehicle 1 is a first magnitude, and the second condition is that the acceleration in the predetermined direction in the vehicle 1 is a second magnitude that is greater than the first magnitude. As a result, when the second condition, which makes the driver more susceptible to car sickness, is met, a smaller image is displayed on the display 100 than when the first condition is met, thereby making it possible to further prevent car sickness in passengers in the rear seat 22.

[0106] <Technology 4> In the vehicle control method described in Technique 3, the first magnitude of the acceleration in the specified direction is a time-averaged magnitude for a specified time, and the second magnitude of the acceleration in the specified direction is a time-averaged magnitude for the specified time. By adopting the time-averaged acceleration over a predetermined period of time in this manner, frequent changes in conditions due to small changes in acceleration can be suppressed.

[0107] <Technology 5> In the vehicle control method according to the third or fourth aspect of the present invention, the predetermined direction is at least one of a left-right direction of the vehicle, a top-bottom direction of the vehicle, or a front-rear direction of the vehicle. This allows the conditions to be appropriately switched in response to changes in the acceleration of the vehicle 1 in various directions.

[0108] <Technology 6> In the vehicle control method described in any one of Techniques 1 to 5, if the first condition is satisfied, the display 100 displays the image 200 at the first size with the center of the image at the first position, and then, if the second condition is satisfied, the display 100 displays the image 200 at the second size with the center of the image at the second position, and then, if the first condition is satisfied, the display 100 displays the image 200 at the first size with the center of the image at the first position. This allows the display 100 to display the image 200 in an appropriate manner according to the conditions, enabling passengers in the rear seat 22 to view the image while preventing car sickness.

[0109] <Technology 7> In the vehicle control method described in any one of Techniques 1 to 6, when the second condition is satisfied, the display 100 displays the image 200 at a second size smaller than the first size with the center of the image at a second position, and displays the image 200 at a third size smaller than the first size with the center of the image at a third position, the second position being to the left of the first position, and the third position being to the right of the first position. As a result, when the second condition for making one prone to car sickness is met, a smaller image is displayed on display 100 than when the first condition is met, thereby making it possible to further prevent passengers in rear seat 22 from becoming car sick.

[0110] <Technology 8> In a vehicle control method described in any one of Techniques 1 to 7, the vehicle 1 is equipped with a seating position detection circuit (e.g., a seating detection device 113) that detects the seating position of an occupant in the rear seat 22, and the second position corresponds to the seating position of the occupant. As a result, the image is displayed at the second position corresponding to the passenger sitting in the rear seat 22, so that the passenger in the rear seat 22 can view the image while facing more forward. Therefore, car sickness of the passenger in the rear seat 22 can be further suppressed.

[0111] <Technology 9> In the vehicle control method according to any one of the first to eighth aspects, the second position is lower than the first position. This allows the passengers in the rear seats 22 to watch the video while facing more forward, thereby further reducing car sickness in the passengers in the rear seats 22.

[0112] <Technology 10> In the vehicle control method described in any one of Techniques 1 to 10, when the second condition is satisfied, the display 100 displays the image 200 at the second size with the center of the image at a second position, and displays information indicating that the image has been intentionally reduced. This allows passengers in the rear seat 22 to know why the image has been reduced in size.

[0113] <Technology 11> The vehicle 1 includes at least a first wheel 3A connected to a vehicle body 2, a second wheel 2B connected to the vehicle body 2, a third wheel 3C connected to the vehicle body 2, and a fourth wheel 3D connected to the vehicle body 2, and can travel in a predetermined direction using the first wheel 3A, the second wheel 3B, the third wheel 3C, and the fourth wheel 3D. The display device is configured to be mounted on the vehicle 1. The vehicle body 2 comprises a floor surface portion 11 and a ceiling surface portion 12 arranged along the specified direction, a left side portion 13 connecting the floor surface portion 11 and the ceiling surface portion 12 and arranged on the left side along the specified direction, a right side portion 14 connecting the floor surface portion 11 and the ceiling surface portion 12 and arranged on the right side along the specified direction, a front surface portion 16 connecting the floor surface portion 11 and the ceiling surface portion 12 and arranged in a front portion 15 with respect to the specified direction, a rear surface portion 18 connecting the floor surface portion 11 and the ceiling surface portion 12 and arranged in a rear portion 17 with respect to the specified direction, at least one front seat 21 arranged on the floor surface portion 11 closer to the front surface portion 16 than the rear surface portion 18, at least one rear seat 22 arranged on the floor surface portion 11 closer to the rear surface portion 18 than the front surface portion 16, and a display 100 arranged between the rear seat 22 and the front seat 21. As a display device, when a first condition is satisfied, the display 100 displays the image 200 at a first size with the center of the image at a first position, and when a second condition different from the first condition is satisfied, the display 100 displays the image 200 (e.g., reduced images 201A and / or 201B) at a second size smaller than the first size with the center of the image at a second position. This allows the display 100 to display images in an appropriate manner according to the conditions, enabling passengers in the rear seat 22 to view images while preventing car sickness.

[0114] <Technology 12> In the display device according to Technique 11, the second position is to the left of the first position, or the second position is to the right of the first position. As a result, when the second condition is met, the image is displayed to the left or right of the first position, so that the passenger in the rear seat 22 can view the image while facing more forward. This makes it possible to further prevent the passenger in the rear seat 22 from getting car sick.

[0115] <Technology 13> In the display device described in Technology 11 or 12, the first condition is that the acceleration in a predetermined direction of the vehicle is a first magnitude, and the second condition is that the acceleration in the predetermined direction of the vehicle is a second magnitude that is greater than the first magnitude. As a result, when the second condition, which makes the driver more susceptible to car sickness, is met, a smaller image is displayed on the display 100 than when the first condition is met, thereby making it possible to further prevent car sickness in passengers in the rear seat 22.

[0116] <Technology 14> In the display device described in Technology 13, the first magnitude of the acceleration in the specified direction is a time-averaged magnitude over a specified time period, and the second magnitude of the acceleration in the specified direction is a time-averaged magnitude over the specified time period. By adopting the time-averaged acceleration over a predetermined period of time in this manner, frequent changes in conditions due to small changes in acceleration can be suppressed.

[0117] <Technology 15> In the display device according to Technique 13 or 14, the predetermined direction is at least one of a left-right direction of the vehicle, a top-bottom direction of the vehicle, or a front-rear direction of the vehicle. This allows the conditions to be appropriately switched in response to changes in the acceleration of the vehicle 1 in various directions.

[0118] <Technology 16> In a display device described in any one of Techniques 11 to 15, if the first condition is satisfied, the display 100 displays the image 200 at the first size with the image center at the first position, and then, if the second condition is satisfied, the display 100 displays the image 200 at the second size with the image center at the second position, and then, if the first condition is satisfied, the display 100 displays the image 200 at the first size with the image center at the first position. This allows the display 100 to display the image 200 in an appropriate manner according to the conditions, enabling passengers in the rear seat 22 to view the image while preventing car sickness.

[0119] <Technology 17> In the display device described in any one of Techniques 11 to 16, when the second condition is satisfied, the display 100 displays the image 200 at a second size smaller than the first size with the image center at a second position, and displays the image 200 at a third size smaller than the first size with the image center at a third position, the second position being to the left of the first position, and the third position being to the right of the first position. As a result, when the second condition for making one prone to car sickness is met, a smaller image is displayed on display 100 than when the first condition is met, thereby making it possible to further prevent passengers in rear seat 22 from becoming car sick.

[0120] <Technology 18> In the display devices described in Techniques 11 to 17, the vehicle 1 is equipped with a seating position detection circuit (e.g., a seating detection device 113) that detects the seating position of an occupant in the rear seat 22, and the second position corresponds to the seating position of the occupant. As a result, the image is displayed at the second position corresponding to the passenger sitting in the rear seat 22, so that the passenger in the rear seat 22 can view the image while facing more forward. Therefore, car sickness of the passenger in the rear seat 22 can be further suppressed.

[0121] <Technology 19> In the display device according to any one of techniques 11 to 18, the second position is lower than the first position. This allows the passengers in the rear seats 22 to watch the video while facing more forward, thereby further reducing car sickness in the passengers in the rear seats 22.

[0122] <Technology 20> In a display device described in any one of Techniques 11 to 20, when the second condition is satisfied, the display 100 displays the image 200 at the second size with the center of the image at a second position, and displays information indicating that the image has been intentionally reduced. This allows passengers in the rear seat 22 to know why the image has been reduced in size.

[0123] Although the embodiments have been described above with reference to the accompanying drawings, the present disclosure is not limited to such examples. It is clear that a person skilled in the art can conceive of various modifications, corrections, substitutions, additions, deletions, and equivalents within the scope of the claims, and it is understood that these also belong to the technical scope of the present disclosure. In addition, the components in the above-mentioned embodiments may be arbitrarily combined within the scope of the invention. [Industrial Applicability]

[0124] The technology of the present disclosure is useful for vehicles equipped with displays inside the vehicle. [Explanation of symbols]

[0125] 1 vehicle 2. Body 3A 1st wheel 3B 2nd wheel 3C 3rd wheel 3D 4th wheel 4. Front Window 11 Floor section 12 Ceiling section 13 Left side part 14 Right side part 15 Front 16 Front part 17 Rear 18 Rear part 21, 21A, 21B front seats 22, 22A, 22B rear seats 100 Display 101 Speaker 102 Operation section 110 In-vehicle network 111 Communication equipment 112 Vehicle control device 113 Sitting Detection Device 114 IVI equipment 115 Image control device 116 Sound control device 200 videos 201A, 201B Reduced image 202 Background Image 210A, 210B center axis

Claims

1. A first wheel coupled to the vehicle body; A second wheel connected to the vehicle body; A third wheel connected to the vehicle body; and a fourth wheel connected to the vehicle body. A vehicle capable of traveling in a predetermined direction using the first wheel, the second wheel, the third wheel, and the fourth wheel, The vehicle body is A floor surface portion and a ceiling surface portion arranged along the predetermined direction; a left side surface portion that connects the floor surface portion and the ceiling surface portion and is disposed on the left side along the predetermined direction; a right side surface portion that connects the floor surface portion and the ceiling surface portion and is disposed on the right side along the predetermined direction; a front surface portion that connects the floor surface portion and the ceiling surface portion and is disposed in a front portion with respect to the predetermined direction; A rear surface portion that connects the floor surface portion and the ceiling surface portion and is disposed at the rear with respect to the predetermined direction; At least one front seat arranged on the floor surface portion closer to the front surface portion than the rear surface portion; At least one rear seat disposed on the floor surface portion toward the rear surface portion from the front surface portion; A display disposed between the rear seat and the front seat. A vehicle control method for the vehicle, comprising: When a first condition is satisfied, the display displays an image with a first size and with a center of the image at a first position; When a second condition different from the first condition is satisfied, the display displays the image with a center of the image at a second position and at a second size smaller than the first size. A vehicle control method.

2. 2. A vehicle control method according to claim 1, the second position is to the left of the first position; or The second position is to the right of the first position. A vehicle control method.

3. 2. A vehicle control method according to claim 1, the first condition is that an acceleration of the vehicle in a predetermined direction is a first magnitude, The second condition is that the acceleration of the vehicle in the predetermined direction is a second magnitude that is greater than the first magnitude. A vehicle control method.

4. The vehicle control method according to claim 3, the first magnitude of acceleration in the predetermined direction is a time-averaged magnitude for a predetermined time; The second magnitude of the acceleration in the predetermined direction is a time average magnitude for the predetermined time. A vehicle control method.

5. The vehicle control method according to claim 3, The predetermined direction is at least one of a left-right direction of the vehicle, a top-bottom direction of the vehicle, or a front-rear direction of the vehicle. A vehicle control method.

6. 2. A vehicle control method according to claim 1, When the first condition is satisfied, the display displays the image with the center of the image at the first position and with the first size; Next, when the second condition is satisfied, the display displays the image with the center of the image at a second position and with the second size; Next, when the first condition is satisfied, the display displays the image with the center of the image at the first position and with the first size. A vehicle control method.

7. 2. A vehicle control method according to claim 1, When the second condition is satisfied, the display displays the image at a second size smaller than the first size with the image center at a second position, and displays the image at a third size smaller than the first size with the image center at a third position, The second position is to the left of the first position, and the third position is to the right of the first position. A vehicle control method.

8. 2. A vehicle control method according to claim 1, the vehicle includes a seating position detection circuit that detects a seating position of an occupant in the rear seat; The second position corresponds to the seating position of the occupant. A vehicle control method.

9. 2. A vehicle control method according to claim 1, The second position is lower than the first position. A vehicle control method.

10. 2. A vehicle control method according to claim 1, When the second condition is satisfied, the display displays the image at the second size with the image center at the second position, and displays information indicating that the image has been intentionally reduced. A vehicle control method.

11. A first wheel coupled to the vehicle body; A second wheel connected to the vehicle body; A third wheel connected to the vehicle body; and a fourth wheel connected to the vehicle body. A display device configured to be mounted on a vehicle capable of traveling in a predetermined direction using the first wheel, the second wheel, the third wheel, and the fourth wheel, The vehicle body is A floor surface portion and a ceiling surface portion arranged along the predetermined direction; a left side surface portion that connects the floor surface portion and the ceiling surface portion and is disposed on the left side along the predetermined direction; a right side surface portion that connects the floor surface portion and the ceiling surface portion and is disposed on the right side along the predetermined direction; a front surface portion that connects the floor surface portion and the ceiling surface portion and is disposed in a front portion with respect to the predetermined direction; A rear surface portion that connects the floor surface portion and the ceiling surface portion and is disposed at the rear with respect to the predetermined direction; At least one front seat arranged on the floor surface portion closer to the front surface portion than the rear surface portion; At least one rear seat disposed on the floor surface portion toward the rear surface portion from the front surface portion; a display disposed between the rear seat and the front seat, When a first condition is satisfied, the display displays an image with a first size and with a center of the image at a first position; When a second condition different from the first condition is satisfied, the display displays the image with a center of the image at a second position and at a second size smaller than the first size. Display device.

12. The display device according to claim 11, the second position is to the left of the first position; or The second position is to the right of the first position. Display device.

13. The display device according to claim 11, the first condition is that an acceleration of the vehicle in a predetermined direction is a first magnitude, The second condition is that the acceleration of the vehicle in the predetermined direction is a second magnitude that is greater than the first magnitude. Display device.

14. The display device according to claim 13, the first magnitude of acceleration in the predetermined direction is a time-averaged magnitude for a predetermined time; The second magnitude of the acceleration in the predetermined direction is a time average magnitude for the predetermined time. Display device.

15. The display device according to claim 13, The predetermined direction is at least one of a left-right direction of the vehicle, a top-bottom direction of the vehicle, or a front-rear direction of the vehicle. Display device.

16. The display device according to claim 11, When the first condition is satisfied, the display displays the image with the center of the image at the first position and with the first size; Next, when the second condition is satisfied, the display displays the image with the center of the image at a second position and with the second size; Next, when the first condition is satisfied, the display displays the image with the center of the image at the first position and with the first size. Display device.

17. The display device according to claim 11, When the second condition is satisfied, the display displays the image at a second size smaller than the first size with the image center at a second position, and displays the image at a third size smaller than the first size with the image center at a third position, The second position is to the left of the first position, and the third position is to the right of the first position. Display device.

18. The display device according to claim 11, the vehicle includes a seating position detection circuit that detects a seating position of an occupant in the rear seat; The second position corresponds to the seating position of the occupant. Display device.

19. The display device according to claim 11, The second position is lower than the first position. Display device.

20. The display device according to claim 11, When the second condition is satisfied, the display displays the image at the second size with the image center at the second position, and displays information indicating that the image has been intentionally reduced. Display device.

Images