Display device for vehicle, display method for vehicle, and recording medium

Abstract

The present disclosure relates to a display device for a vehicle, a display method for a vehicle, and a recording medium. The display device for a vehicle is provided on a vehicle and is capable of displaying a moving image representing a relatively moving object when a detection device detects a relatively moving object located around the vehicle within a predetermined detection range, wherein when the relative distance between the relatively moving object and the vehicle is within a normal range, the display device for a vehicle changes a display condition according to the relative distance, the display condition being at least one of the size and display position of the moving image, and when the relative distance is outside the normal range, the display device for a vehicle does not change the display condition.

Description

Technical Field

[0001] The present disclosure relates to a display device for a vehicle, a display method for a vehicle, and a recording medium. Background Art

[0002] Japanese Patent Application Publication (JP-A) No. 2021-117925 discloses a display device for a vehicle that can display an image representing a leading vehicle located in front of the vehicle (host vehicle).

[0003] On a display device for a vehicle, the relative distance between an image representing the own vehicle and an image representing a preceding vehicle, and the size of the image representing the preceding vehicle, may vary according to the relative distance between the vehicle (the own vehicle) and the preceding vehicle.

[0004] In this case, if the relative distance between the image representing the vehicle and the image representing the vehicle ahead on the display device for the vehicle becomes too long or too short, there is a concern that the vehicle occupant viewing the display device for the vehicle may feel a sense of incongruity. In addition, if the image representing the vehicle ahead becomes too large or too small, there is a concern that the vehicle occupant viewing the display device for the vehicle may feel a sense of incongruity.

[0005] In view of the above situation, an object of the present disclosure is to provide a display device for a vehicle, a display method for a vehicle and a recording medium, wherein, when at least one of the size and the display position of a moving image representing a relative moving body is changed according to the relative distance between the vehicle and a relative moving body located around the vehicle, a vehicle occupant who is watching the moving image will hardly feel a sense of disharmony. Summary of the invention

[0006] The display device for a vehicle of the first aspect is a display device for a vehicle arranged on the vehicle, and when a detection device detects a relatively moving body located around the vehicle within a predetermined detection range, the display device for the vehicle is capable of displaying a moving image representing the relatively moving body, wherein, when the relative distance between the relatively moving body and the vehicle is within a normal range, the display device for the vehicle changes a display condition according to the relative distance, and the display condition is at least one of the size and display position of the moving image, and when the relative distance is outside the normal range, the display device for the vehicle does not change the display condition.

[0007] The display device for a vehicle of the first aspect is arranged on the vehicle. When a detection device detects a relatively moving body located around the vehicle within a predetermined detection range, the display device for the vehicle is capable of displaying a moving image representing the relatively moving body. In addition, when the relative distance between the relatively moving body and the vehicle is within a normal range, the display device for the vehicle changes a display condition according to the relative distance, and the display condition is at least one of the size and display position of the moving image. On the other hand, when the relative distance is outside the normal range, the display device for the vehicle does not change the display condition. Therefore, in the display device for a vehicle of the first aspect, it is difficult for a vehicle occupant who is viewing the moving image to feel a sense of disharmony.

[0008] In the display device for a vehicle of the second aspect, in the first aspect, when the relative distance is within the normal range, the display device for a vehicle causes the moving image to gradually become smaller as the relative distance becomes longer, and, considering that when the relative distance is within the normal range, the size of the moving image when the relative distance becomes a maximum value is defined as a minimum size, the display device for a vehicle causes the size of the moving image when the relative distance is outside the normal range and has become greater than the maximum value to be the minimum size.

[0009] In the case where the relative distance between the vehicle and the relatively moving body is within the normal range, the display device for the vehicle of the second aspect makes the moving image gradually smaller as the relative distance between the vehicle and the relatively moving body becomes longer. In addition, considering that the size of the moving image when the relative distance becomes the maximum value is defined as the minimum size when the relative distance is outside the normal range and has become greater than the maximum value, the display device for the vehicle of the second aspect makes the size of the moving image when the relative distance is outside the normal range and has become greater than the maximum value the minimum size. That is, when the relative distance is outside the normal range and has become greater than the maximum value, the display device for the vehicle of the second aspect does not make the size of the moving image smaller than the minimum size. Therefore, in the display device for the vehicle of the second aspect, when the relative distance is outside the normal range and has become greater than the maximum value, it is difficult for the vehicle occupant who is watching the moving image to feel a sense of disharmony.

[0010] In the display device for a vehicle of the third aspect, in the first aspect or the second aspect, when the relative distance is within the normal range, the display device for the vehicle causes the moving image to gradually become smaller as the relative distance becomes longer, and, considering that when the relative distance is within the normal range, the size of the moving image when the relative distance becomes the minimum value is defined as the maximum size, the display device for the vehicle causes the size of the moving image when the relative distance is outside the normal range and has become smaller than the minimum value to be the maximum size.

[0011] In the case where the relative distance between the vehicle and the relatively moving body is within the normal range, the display device for the vehicle of the third aspect makes the moving image gradually smaller as the relative distance between the vehicle and the relatively moving body becomes longer. In addition, considering that the size of the moving image when the relative distance becomes the minimum value is defined as the maximum size when the relative distance is outside the normal range and has become less than the minimum value, the display device for the vehicle of the third aspect makes the size of the moving image when the relative distance is outside the normal range and has become less than the minimum value the maximum size. That is, when the relative distance is outside the normal range and has become less than the minimum value, the display device for the vehicle of the third aspect does not make the size of the moving image larger than the maximum size. Therefore, in the display device for the vehicle of the third aspect, when the relative distance is outside the normal range and has become less than the minimum value, it is difficult for the vehicle occupant who is watching the moving image to feel a sense of disharmony.

[0012] In the display device for a vehicle of the fourth aspect, in the first aspect, when the relative distance is within the normal range, the display device for a vehicle makes the moving image gradually smaller as the relative distance becomes longer, and considering that when the relative distance within the normal range is at any first distance, the size of the moving image is defined as a first size, when the relative distance within the normal range is at any second distance longer than the first distance, the size of the moving image is defined as a second size, when the relative distance within the normal range is at any third distance longer than the second distance, the size of the moving image is defined as a third size, and when the relative distance within the normal range is at any fourth distance longer than the third distance, the size of the moving image is defined as a fourth size, the display device for a vehicle makes the second size change amount smaller than the first size change amount, the second size change amount being a value obtained by dividing a value obtained by subtracting the fourth size from the third size by the third size, and the first size change amount being a value obtained by dividing a value obtained by subtracting the second size from the first size by the first size.

[0013] In the case where the relative distance between the vehicle and the relatively moving body is within the normal range, the display device for a vehicle of the fourth aspect makes the moving image gradually smaller as the relative distance becomes longer. In addition, the display device for a vehicle of the fourth aspect makes the second size change amount, which is a value obtained by dividing the value obtained by subtracting the fourth size from the third size by the third size, smaller than the first size change amount, which is a value obtained by dividing the value obtained by subtracting the second size from the first size by the first size. Therefore, in the display device for a vehicle of the fourth aspect, it is difficult for a vehicle occupant who is viewing the moving image to feel a sense of disharmony.

[0014] In the display device for a vehicle of the fifth aspect, in the first aspect, the display device for the vehicle is capable of displaying a vehicle image representing the vehicle, and when the relative distance is within the normal range, the display device for the vehicle causes the display distance to gradually become longer as the relative distance becomes longer, the display distance being the distance between the vehicle image and the moving image, and, considering that when the relative distance is within the normal range, the display distance when the relative distance becomes a maximum value is defined as a maximum distance, the display device for the vehicle causes the display distance when the relative distance is outside the normal range and has become greater than the maximum value to be the maximum distance.

[0015] The display device for a vehicle of the fifth aspect is capable of displaying a vehicle image representing the vehicle. When the relative distance between the vehicle and the relatively moving body is within the normal range, the display device for a vehicle gradually increases the display distance as the relative distance increases, and the display distance is the distance between the vehicle image and the moving image. In addition, considering that when the relative distance is within the normal range, the display distance when the relative distance becomes the maximum value is defined as the maximum distance, the display device for a vehicle of the fifth aspect makes the display distance when the relative distance is outside the normal range and has become greater than the maximum value the maximum distance. That is, when the relative distance is outside the normal range and has become greater than the maximum value, the display device for a vehicle of the fifth aspect does not make the display distance of the moving image longer than the maximum distance. Therefore, in the display device for a vehicle of the fifth aspect, when the relative distance is outside the normal range and has become greater than the maximum value, it is difficult for a vehicle occupant who is viewing the moving image to feel a sense of disharmony.

[0016] In the display device for a vehicle of the sixth aspect, in the first aspect or the fifth aspect, the display device for a vehicle is capable of displaying a vehicle image representing the vehicle, and when the relative distance is within the normal range, the display device for a vehicle causes the display distance to gradually become longer as the relative distance becomes longer, the display distance being the distance between the vehicle image and the moving image, and, considering that when the relative distance is within the normal range, the display distance when the relative distance becomes the minimum value is defined as the minimum distance, the display device for a vehicle causes the display distance when the relative distance is outside the normal range and has become less than the minimum value to be the minimum distance.

[0017] The display device for a vehicle of the sixth aspect is capable of displaying a vehicle image representing the vehicle. When the relative distance between the vehicle and the relatively moving body is within the normal range, the display device for a vehicle gradually increases the display distance as the relative distance increases, and the display distance is the distance between the vehicle image and the moving image. In addition, considering that when the relative distance is within the normal range, the display distance when the relative distance becomes the minimum value is defined as the minimum distance, the display device for a vehicle of the sixth aspect makes the display distance when the relative distance is outside the normal range and has become less than the minimum value the minimum distance. That is, when the relative distance is outside the normal range and has become less than the minimum value, the display device for a vehicle of the sixth aspect does not make the display distance of the moving image shorter than the minimum distance. Therefore, in the display device for a vehicle of the sixth aspect, when the relative distance is outside the normal range and has become less than the minimum value, it is difficult for a vehicle occupant who is viewing the moving image to feel a sense of disharmony.

[0018] In a display device for a vehicle according to a seventh aspect, in the first aspect, the display device for a vehicle is capable of displaying a vehicle image representing the vehicle, and when the relative distance is within the normal range, the display device for a vehicle gradually increases the display distance as the relative distance increases, the display distance being the distance between the vehicle image and the moving image, and considering that when the relative distance within the normal range is at any first distance, the display distance is defined as a first display distance, when the relative distance within the normal range is at any second distance longer than the first distance, the display distance is defined as a second display distance, when the relative distance within the normal range is at any third distance longer than the second distance, the display distance is defined as a third display distance, and when the relative distance within the normal range is at any fourth distance longer than the third distance, the display distance is defined as a fourth display distance, the display device for a vehicle makes the second distance change amount smaller than the first distance change amount, the second distance change amount being a value obtained by dividing a value obtained by subtracting the third display distance from the fourth display distance by the third display distance, and the first distance change amount being a value obtained by dividing a value obtained by subtracting the first display distance from the second display distance by the first display distance.

[0019] The display device for a vehicle of the seventh aspect is capable of displaying a vehicle image representing the vehicle. When the relative distance between the vehicle and the relatively moving body is within the normal range, the display device for a vehicle gradually increases the display distance as the relative distance increases, and the display distance is the distance between the vehicle image and the moving image. In addition, the display device for a vehicle of the seventh aspect makes the second distance change amount smaller than the first distance change amount, the second distance change amount being a value obtained by subtracting the third display distance from the fourth display distance and dividing it by the third display distance, and the first distance change amount being a value obtained by subtracting the first display distance from the second display distance and dividing it by the first display distance. Therefore, in the display device for a vehicle of the seventh aspect, it is difficult for a vehicle occupant who is viewing a moving image to feel a sense of disharmony.

[0020] In the display device for a vehicle of an eighth aspect, in the first aspect or the second aspect, the vehicle is capable of executing driving assist control, and the display device for a vehicle changes the size of the normal range according to the level of the driving assist control.

[0021] The display device for a vehicle of the eighth aspect allows a vehicle occupant to easily recognize that a relatively moving object is being recognized.

[0022] In the display device for a vehicle of a ninth aspect, in the eighth aspect, the display device for a vehicle expands the normal range as the level of the driving assist control increases.

[0023] The display device for a vehicle of the ninth aspect allows a vehicle occupant to easily recognize that a relatively moving object is being recognized.

[0024] In the display device for a vehicle of a tenth aspect, in the eighth aspect, the display device for a vehicle makes the maximum value of the normal range larger as the level of the driving assist control increases.

[0025] The display device for a vehicle of the tenth aspect allows a vehicle occupant to easily recognize that a relatively moving object is being recognized.

[0026] The display method for a vehicle of the eleventh aspect is the following display method for a vehicle: it uses a display device for a vehicle, and the display device for the vehicle can control a display device set on the vehicle, and when a detection device detects a relatively moving body located around the vehicle within a predetermined detection range, it can display a moving image representing the relatively moving body: when the relative distance between the relatively moving body and the vehicle is within a normal range, the display condition is changed according to the relative distance, and the display condition is at least one of the size and display position of the moving image; and when the relative distance is outside the normal range, the display condition is not changed.

[0027] The recording medium related to the twelfth aspect is a recording medium that stores a program that can be executed by a computer to perform processing, and the processing includes: when a detection device detects a relatively moving body located around the vehicle within a predetermined detection range, causing a display device arranged on the vehicle to display a moving image representing the relatively moving body; when the relative distance between the relatively moving body and the vehicle is within a normal range, changing a display condition according to the relative distance, and the display condition is at least one of the size and display position of the moving image; and when the relative distance is outside the normal range, not changing the display condition.

[0028] As described above, the display device for a vehicle, the display method for a vehicle and the recording medium related to the present disclosure have an excellent effect, that is, when at least one of the size and the display position of a moving image representing a relative moving body located around the vehicle is changed according to the relative distance between the vehicle and the relative moving body, it is difficult for vehicle passengers who are watching the moving image to feel a sense of disharmony. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Exemplary embodiments of the present disclosure will be described in detail based on the following drawings, in which:

[0030] Figure 1 is a diagram showing the interior of a vehicle equipped with a display device for a vehicle related to the embodiment;

[0031] Figure 2 It is shown Figure 1 A diagram of the hardware structure of the vehicle shown;

[0032] Figure 3 yes Figure 2 The functional block diagram of the display control ECU shown;

[0033] Figure 4 yes Figure 2 Functional block diagram of ADAS-ECU shown;

[0034] Figure 5 is a diagram showing a display device that displays a vehicle image representing a vehicle, a road image representing a road on which the vehicle is traveling, and a front vehicle image representing a front vehicle;

[0035] Figure 6 is a diagram showing an image size determination diagram indicating the relationship between the relative distance (detection distance) between the vehicle and the vehicle ahead and the size of the image of the vehicle ahead;

[0036] Figure 7 is a diagram showing a display position determination map indicating the relationship between the relative distance (detection distance) between the vehicle and the vehicle ahead and the display position of the image of the vehicle ahead;

[0037] Figure 8 is a flowchart showing a process executed by the CPU of the display control ECU;

[0038] Fig. 9 is a diagram showing an image size determination diagram of a first modified example;

[0039] Fig.10 is a diagram showing a display position determination diagram of a second modified example;

[0040] Fig.11 is a plan view showing a vehicle of a third modified example, a road on which the vehicle is traveling, and a preceding vehicle;

[0041] Fig.12 is with Figure 5 A similar diagram of a third variant example; and

[0042] Fig.13 1 is a plan view showing a vehicle according to a fourth modification example, a road on which the vehicle is traveling, and a preceding vehicle. DETAILED DESCRIPTION

[0043] Embodiments of a display device for a vehicle, a display method for a vehicle, and a recording medium related to the present disclosure are described with reference to the accompanying drawings. An arrow "front" appropriately shown in the accompanying drawings indicates the front side in the longitudinal direction of the vehicle, an arrow "left" indicates the left side in the left-right direction of the vehicle, and an arrow "up" indicates the upper side in the vertical direction of the vehicle.

[0044] like Figure 1As shown, a vehicle 12 to which the display device for a vehicle of the present embodiment is applied has a front windshield 14 and an instrument panel 16. A display device (display device for a vehicle) 18 and a driving assist switch 24 are arranged on the instrument panel 16. As will be described later, the display device 18 can display various images, including a road image 50, a vehicle image 55, and a front vehicle image (moving image) 60. A sensor unit (detection device) 20 is arranged on the upper portion of the vehicle inner surface of the front windshield 14. The sensor unit 20 has a camera 21 and a millimeter wave sensor 22. The camera 21 can capture an image of an object located closer to the front side of the vehicle than the camera 21 itself. The millimeter wave sensor 22 sends a search wave forward and receives a reflected wave. That is, the camera 21 and the millimeter wave sensor 22 can detect an object located within a predetermined detection range. The driving assist switch 24 is a switch for causing the vehicle 12 to perform the driving assist control described later.

[0045] like Figure 2 As shown, the vehicle 12 has a display control ECU (Electronic Control Unit) 26 and an ADAS-ECU 36 as its hardware configuration in addition to the sensor unit 20 and the driving assist switch 24 .

[0046] The display control ECU 26 is constructed to include a CPU (Central Processing Unit) (Processor) (Computer) 26A, a ROM (Read Only Memory) (Recording Medium) (Storage Medium) 26B, a RAM (Random Access Memory) 26C, a memory (Recording Medium) (Storage Medium) 26D, an on-vehicle communication I / F 26F, and an input / output I / F 26G. The CPU 26A, the ROM 26B, the RAM 26C, the memory 26D, the on-vehicle communication I / F 26F, and the input / output I / F 26G are connected so as to be able to communicate with each other via an internal bus 26Z.

[0047] The CPU 26A is a central calculation processing unit, and executes various programs and controls various parts. The CPU 26A reads out a program from the ROM 26B or the memory 26D, and executes the program by using the RAM 26C as a work space. The CPU 26A performs control of various structures and various calculation processes according to the program recorded in the ROM 26B or the memory 26D.

[0048] The ROM 26B stores various programs and various data. The RAM 26C temporarily stores programs and data as a work space. The storage 26D is composed of a storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive), and stores various programs and various data.

[0049] The in-vehicle communication I / F 26F is an interface for connecting to the ADAS-ECU 36 via the external bus 26H. For example, a communication standard conforming to the CAN protocol is used for this interface.

[0050] The input / output I / F 26G is an interface for communicating with various devices.

[0051] Figure 3 The block diagram in 26 shows an example of the functional structure of the display control ECU 26. The display control ECU 26 has a display control section 261 and a communication control section 262 as its functional structure. The display control section 261 and the communication control section 262 are realized as a result of the CPU 26A reading out and executing a program stored in the ROM 26B.

[0052] The display control section 261 controls the display device 18. A detailed description of the function of the display control section 261 is given later.

[0053] The communication control unit 262 controls the in-vehicle communication I / F 26F.

[0054] The ADAS-ECU 36 is configured to include a CPU, a ROM (recording medium) (storage medium), a RAM, a memory (recording medium) (storage medium), an on-vehicle communication I / F, and an input / output I / F. These components are connected so as to be able to communicate with each other via an internal bus.

[0055] ADAS-ECU 36 is connected to sensor unit 20. In addition, ADAS-ECU 36 is connected to various actuators for driving an accelerator device, a brake device, and a steering device. Vehicle 12 has an electric motor (actuator) as its drive source. ADAS-ECU 36 is connected to the electric motor. However, the drive source of vehicle 12 may include an internal combustion engine.

[0056] Figure 4 The block diagram in shows an example of the functional structure of the ADAS-ECU 36. The ADAS-ECU 36 has a driving assistance control section 361 as its functional structure. The driving assistance control section 361 is implemented by the CPU reading out and executing a program stored in the ROM.

[0057] Since the driving assistance control unit 361 controls the above-mentioned actuator group, the vehicle 12 performs driving assistance control of driving levels 1 to 5 set by SAE (Society of Automotive Engineers). For example, the vehicle 12 can perform ACC (Adaptive Cruise Control, Level 1). The driving assistance switch 24 is switched between an on state and an off state by being operated by a vehicle occupant. When the driving assistance switch 24 is set to the on state, the vehicle 12 can perform driving assistance control. In addition, by operating the driving assistance switch 24 in the on state when predetermined conditions are met, the vehicle occupant can cause the vehicle 12 to perform any driving assistance control from level 1 to level 5. The vehicle occupant can also cause the vehicle to travel at level 0. When the level of driving assistance control is 0, driving assistance control is basically not performed, or the function of the driving assistance control performed is a limited function. In the following, a description of the situation during ACC execution will be given.

[0058] Here, if Figure 1 As shown, it is assumed that the vehicle 12 is traveling forward on the straight road 40, and the front vehicle (relative moving body) 45 located ahead of the vehicle 12 is traveling forward on the road 40. In this case, when the vehicle 12 performs ACC due to the operation of the driving assist switch 24, the driving assist control section 361 recognizes the existence of the front vehicle 45, the relative distance (detection distance) of the front vehicle 45 relative to the vehicle 12, and the relative position of the front vehicle 45 relative to the vehicle 12 based on the data sent from the sensor unit 20 to the ADAS-ECU 36. In addition, the driving assist control section 361 controls the above-mentioned actuator group so that the inter-vehicle distance between the vehicle 12 and the front vehicle 45 is maintained at the set distance, which is the inter-vehicle distance set by the vehicle occupant by using the driving assist switch 24.

[0059] Next, the function of the display control section 261 will be described in detail.

[0060] like Figure 5 As shown in FIG. 2 , while the driving assistance control unit 361 is executing ACC, the display control unit 261 causes the display device 18 to display a road image 50 representing the road 40 and a vehicle image 55 representing the vehicle 12. The display position of the vehicle image 55 on the display device 18 is fixed. In addition, when the driving assistance control unit 361 recognizes the vehicle 45 ahead, as shown in FIG. Figure 5 As shown, the display control portion 261 causes the display device 18 to display a front vehicle image 60 representing the front vehicle 45. In other words, when the sensor unit 20 detects the front vehicle 45 while the driving assist control portion 361 is executing ACC, the display control portion 261 causes the display device 18 to display the front vehicle image 60.

[0061] Furthermore, based on information on the relative position and relative distance of the aforementioned front vehicle 45 received from the ADAS-ECU 36 during execution of ACC, the display control portion 261 recognizes the relative position and relative distance of the front vehicle 45 with respect to the vehicle 12 .

[0062] Furthermore, when the display control unit 261 causes the display device 18 to display the front vehicle image 60, the display control unit 261 determines the image 62 (see FIG. 61 ) by using the image size recorded in the ROM 26B or the memory 26D. Figure 6 ) and display position determination Figure 64 (see Figure 7 ) to change the display format of the front vehicle image 60 on the display device 18.

[0063] The image size determination diagram 62 shows the relationship between the relative distance (detection distance) between the vehicle 12 and the front vehicle 45 and the size (display condition) of the front vehicle image 60 on the display device 18. In the case where ACC is being performed, in the image size determination diagram 62, the range of the relative distance between 10m and 110m is defined as the normal range NA. The range of the relative distance less than 10m is the first special range SA1, and the range of the relative distance greater than 110m is the second special range SA2. In the case where the aforementioned relative distance is within the normal range NA, the image size determination diagram 62 stipulates that the relative distance between the vehicle 12 and the front vehicle 45 is proportional to the size (dimension) of the front vehicle image 60 on the display device 18. That is, in the case where the aforementioned relative distance is within the normal range NA, the front vehicle image 60 gradually becomes smaller as the relative distance between the vehicle 12 and the front vehicle 45 becomes longer. Here, in the case where the relative distance is within the normal range NA, when the relative distance between the vehicle 12 and the front vehicle 45 becomes the maximum value (110m), the size of the front vehicle image 60 is defined as the minimum size Mid. Furthermore, in the case where the relative distance is within the normal range NA, when the relative distance between the vehicle 12 and the front vehicle 45 becomes the minimum value (10 m), the size of the front vehicle image 60 is defined as the maximum size Mxd. Furthermore, the image size determination diagram 62 stipulates that when the relative distance between the vehicle 12 and the front vehicle 45 is within the second special range SA2, the size of the front vehicle image 60 will be maintained at the minimum size Mid. Furthermore, the image size determination diagram 62 stipulates that when the relative distance between the vehicle 12 and the front vehicle 45 is within the first special range SA1, the size of the front vehicle image 60 will be maintained at the maximum size Mxd. Note that in the case where the level of driving assistance control is level 0 (manual driving), the normal range NA is the range of relative distances between 10 m and 40 m. In the case where the level of driving assistance control is different from ACC, the size of the front vehicle image 60 on the display device 18 may be defined based on the image size determination diagram 62 specifically used for this case, or the size of the front vehicle image 60 may be defined based on the image size determination diagram 62 similar to the image size determination diagram when the ACC is operated except that the normal range NA is different. In this way, the normal range NA can be changed according to the level of driving assistance control. In more detail, the size of the front vehicle image 60 can be defined based on the image size determination diagram 62 that expands the normal range NA as the level of driving assistance control increases. When the level increases and the driving assistance range handled by the driving assistance control unit 361 becomes larger, the operation that the vehicle occupant must perform is relatively reduced. Therefore, in order to reassure the vehicle occupant in the case where the level of driving assistance control increases, the need to let the vehicle occupant know that the driving assistance control unit 361 is recognizing the front vehicle 45 increases.Therefore, if the normal range NA is expanded as the level of driving assistance control increases, the vehicle occupant can easily recognize that the driving assistance control section 361 is recognizing the vehicle 45 ahead, and the vehicle occupant can be assured. For example, in the case where the steering assist as the level 2 driving assistance control is operated in addition to the driving assistance control of acceleration / deceleration as the level 1 driving assistance control, the maximum value of the normal range NA can be made larger than the case where the level 1 driving assistance control is performed. For example, in this case, the normal range NA can be a range of relative distances between 10m and 130m. Note that, in the case where the level of driving assistance control increases, the minimum value of the normal range NA can be smaller.

[0064] The display position determination diagram 64 shows the relationship between the relative distance (detection distance) between the vehicle 12 and the front vehicle 45 and the display position (display condition) of the front vehicle image 60 on the display device 18. In other words, the display position determination diagram 64 shows the relationship between the relative distance between the vehicle 12 and the front vehicle 45 and the display distance which is the distance between the vehicle image 55 and the front vehicle image 60 on the display device 18. In the display position determination diagram 64, the range of the relative distance between 10m and 110m is defined as the normal range NA. The range of the relative distance less than 10m is the first special range SA1, and the range of the relative distance greater than 110m is the second special range SA2. The display position determination diagram 64 stipulates that, in the case where the aforementioned relative distance is within the normal range NA, the relative distance between the vehicle 12 and the front vehicle 45 is proportional to the display distance of the front vehicle image 60 on the display device 18. That is, in the case where the aforementioned relative distance is within the normal range NA, as the relative distance between the vehicle 12 and the front vehicle 45 becomes longer, the display distance gradually becomes longer. Here, in the case where the relative distance is within the normal range NA, when the relative distance between the vehicle 12 and the front vehicle 45 becomes the maximum value (110m), the display distance of the front vehicle image 60 is defined as the maximum distance Mx1. In addition, in the case where the relative distance is within the normal range NA, when the aforementioned relative distance between the vehicle 12 and the front vehicle 45 becomes the minimum value (10m), the display distance of the front vehicle image 60 is defined as the minimum distance Mil. In addition, the display position determination diagram 64 stipulates that when the relative distance between the vehicle 12 and the front vehicle 45 is within the second special range SA2, the display distance of the front vehicle image 60 will be maintained at the maximum distance Mx1. The display position determination diagram 64 stipulates that when the relative distance between the vehicle 12 and the front vehicle 45 is within the first special range SA1, the display distance of the front vehicle image 60 will be maintained at the minimum distance Mil.

[0065] In this specification, when the relative distance between the vehicle 12 and the leading vehicle 45 is within the normal range NA, the display form of the leading vehicle image 60 on the display device 18 specified by the image size determination diagram 62 and the display position determination diagram 64 is referred to as a change mode. In addition, when the aforementioned relative distance is within the first special range SA1 or the second special range SA2, the display form of the leading vehicle image 60 on the display device 18 specified by the image size determination diagram 62 and the display position determination diagram 64 is referred to as a fixed mode.

[0066] (Operation and Effect)

[0067] Next, the operation and effects of this embodiment are described.

[0068] Next, the processing executed by the CPU 26A of the display control ECU 26 is described. The CPU 26A repeatedly executes the following processing every time a predetermined period of time has elapsed. Figure 8 Processing of the flowchart shown.

[0069] In step S10 (hereinafter the word "step" is omitted), the CPU 26A determines whether the vehicle 12 (ADAS-ECU 36) is currently executing ACC. If the determination in S10 is "YES", the CPU 26A moves to S11.

[0070] In S11, the CPU 26A determines whether the driving assistance control portion 361 is recognizing the leading vehicle 45 based on the information received from the ADAS-ECU 36. If the determination in S11 is "YES", the CPU 26A moves to S12.

[0071] In S12 , the CPU 26A causes the display device 18 to display the front vehicle image 60 .

[0072] The CPU 26A having completed the process of S12 moves to S13 and determines, based on the information received from the ADAS-ECU 36 , whether the relative distance between the vehicle 12 and the preceding vehicle 45 is included in the normal range NA.

[0073] If the determination in S13 is "YES", the CPU 26A moves to S14 and causes the display device 18 to display the front vehicle image 60 based on the changed mode.

[0074] If the determination in S13 is NO, the CPU 26A moves to S15 and causes the display device 18 to display the front vehicle image 60 based on the fixed mode.

[0075] If the determination in S10 or S11 is "NO", or when the processing in S15 is completed, the CPU 26A temporarily ends the Figure 8 Flowchart of the process.

[0076] As described above, when the sensor unit 20 detects the front vehicle 45 located around the vehicle 12 within the predetermined detection range, the display device 18 of the present embodiment can display the front vehicle image 60 indicating the front vehicle 45. Furthermore, when the relative distance between the vehicle 12 and the front vehicle 45 is within the normal range NA, the display device 18 makes the relative distance between the vehicle 12 and the front vehicle 45 and the size of the front vehicle image 60 on the display device 18 proportional to each other, and makes the relative distance between the vehicle 12 and the front vehicle 45 and the display distance between the front vehicle image 60 and the vehicle image 55 on the display device 18 proportional to each other. That is, when the relative distance is within the normal range NA, the display device 18 makes the size of the front vehicle image 60 when the relative distance between the vehicle 12 and the front vehicle 45 becomes the maximum value (110 m) the minimum size Mid, and when the relative distance is within the normal range NA, makes the size of the front vehicle image 60 when the aforementioned relative distance becomes the minimum value (10 m) the maximum size Mxd. Furthermore, when the relative distance is within the normal range NA, the display device 18 makes the display distance of the front vehicle image 60 when the relative distance becomes the maximum value the maximum distance Mx1, and when the relative distance is within the normal range NA, makes the display distance of the front vehicle image 60 when the relative distance becomes the minimum value the minimum distance Mil. Therefore, when the relative distance between the vehicle 12 and the front vehicle 45 is within the normal range NA, the vehicle occupant who is viewing the display device 18 can easily feel the distance between the vehicle 12 and the front vehicle 45.

[0077] Incidentally, if the size of the front vehicle image 60 when the relative distance between the vehicle 12 and the front vehicle 45 is made even smaller than the minimum size Mid, or if the size of the front vehicle image 60 when the aforementioned relative distance is within the first special range SA1 is made even larger than the maximum size Mxd, the vehicle occupant who is viewing the display device 18 is likely to feel a sense of discomfort. However, the display device 18 of the present embodiment maintains the size of the front vehicle image 60 when the aforementioned relative distance is within the second special range SA2 at the minimum size Mid, and maintains the size of the front vehicle image 60 when the aforementioned relative distance is within the first special range SA1 at the maximum size Mxd. Therefore, even in the case where the relative distance between the vehicle 12 and the front vehicle 45 is outside the normal range NA, the display device 18 can make the vehicle occupant understand that the driving assist control unit 361 is recognizing the front vehicle 45, and the vehicle occupant who is viewing the front vehicle image 60 is unlikely to feel a sense of discomfort.

[0078] If the display distance of the front vehicle image 60 when the relative distance between the vehicle 12 and the front vehicle 45 is made even longer than the maximum distance Mx1, or if the display distance of the front vehicle image 60 when the aforementioned relative distance is within the first special range SA1 is made even shorter than the minimum distance Mil, the vehicle occupant who is viewing the display device 18 is likely to feel a sense of incongruity. However, the display device 18 of the present embodiment maintains the display distance of the front vehicle image 60 when the aforementioned relative distance is within the second special range SA2 at the maximum distance Mx1, and maintains the display distance of the front vehicle image 60 when the aforementioned relative distance is within the first special range SA1 at the minimum distance Mil. Therefore, in the case where the relative distance between the vehicle 12 and the front vehicle 45 is outside the normal range NA, the vehicle occupant who is viewing the front vehicle image 60 on the display device 18 is unlikely to feel a sense of incongruity.

[0079] Furthermore, if the display distance of the front vehicle image 60 when the relative distance between the vehicle 12 and the front vehicle 45 is within the second special range SA2 is made longer than the maximum distance Mx1, or if the display distance of the front vehicle image 60 when the relative distance is within the first special range SA1 is made shorter than the minimum distance Mil, the required size of the display device 18 ( Figure 1 However, the display device 18 maintains the display distance of the front vehicle image 60 when the relative distance is within the second special range SA2 at the maximum distance Mx1, and maintains the display distance of the front vehicle image 60 when the relative distance is within the first special range SA1 at the minimum value. Therefore, the size of the display device 18 is prevented from becoming too large.

[0080] The display device for a vehicle, the display method for a vehicle, and the recording medium related to the embodiments have been described above, but the designs thereof may be appropriately changed within the scope not departing from the gist of the present disclosure.

[0081] For example, the present disclosure may be Fig. 9 The first modified example is implemented in the form of the first modified example shown. In the first modified example, the size of the front vehicle image 60 on the display device 18 is controlled according to the image size determination diagram 66. When the relative distance between the vehicle 12 and the front vehicle 45 is within the normal range NA, the prescribed content of the size of the front vehicle image 60 presented in the image size determination diagram 66 is different from the prescribed content of the image size determination diagram 62. On the other hand, when the relative distance between the vehicle 12 and the front vehicle 45 is within the first special range SA1 or the second special range SA2, the prescribed content of the size of the front vehicle image 60 presented in the image size determination diagram 66 is the same as the prescribed content of the image size determination diagram 62.

[0082] The image size determination diagram 66 also stipulates that, when the aforementioned relative distance is within the normal range NA, as the relative distance between the vehicle 12 and the front vehicle 45 becomes longer, the front vehicle image 60 gradually becomes smaller. However, in the image size determination diagram 66, the relative distance between the vehicle 12 and the front vehicle 45 is not proportional to the size (dimension) of the front vehicle image 60. Here, as shown in FIG. Fig. 9 As shown, in a case where the aforementioned relative distance is at any first distance LG1 included in the normal range NA, the size of the front vehicle image 60 is defined as a first size DM1. In a case where the aforementioned relative distance is included in the normal range NA and is at any second distance LG2 longer than the first distance LG1, the size of the front vehicle image 60 is defined as a second size DM2. In a case where the aforementioned relative distance is included in the normal range NA and is at any third distance LG3 longer than the second distance LG2, the size of the front vehicle image 60 is defined as a third size DM3. In a case where the aforementioned relative distance is included in the normal range NA and is at any fourth distance LG4 longer than the third distance LG3, the size of the front vehicle image 60 is defined as a fourth size DM4. In addition, the image size determination diagram 66 stipulates that the second size change amount is made smaller than the first size change amount, the second size change amount being a value obtained by dividing the value obtained by subtracting the fourth size DM4 from the third size DM3 by the third size DM3, and the first size change amount being a value obtained by dividing the value obtained by subtracting the second size DM2 from the first size DM1 by the first size DM1. Therefore, as Fig. 9 As shown, the graph (function) representing the relationship between the relative distance between the vehicle 12 and the front vehicle 45 within the normal range NA and the size of the front vehicle image 60 is a curve rather than a straight line. Therefore, when the size of the front vehicle image 60 on the display device 18 is changed based on this image size determination map 66, the vehicle occupant who is viewing the front vehicle image 60 is even less likely to feel a sense of discomfort than when the vehicle occupant views the front vehicle image 60 whose size is changed based on the image size determination map 62.

[0083] The present disclosure can be Fig.10The second modified example is implemented in the form of the second modified example shown. In the second modified example, the display distance between the vehicle image 55 and the front vehicle image 60 on the display device 18 is controlled according to the display position determination diagram 68. When the relative distance between the vehicle 12 and the front vehicle 45 is within the normal range NA, the prescribed content of the display distance of the front vehicle image 60 on the display device 18 presented in the display position determination diagram 68 is different from the prescribed content of the display position determination diagram 64. On the other hand, when the relative distance between the vehicle 12 and the front vehicle 45 is within the first special range SA1 or the second special range SA2, the prescribed content of the display distance of the front vehicle image 60 presented in the display position determination diagram 68 is the same as the prescribed content of the display position determination diagram 64.

[0084] The display position determination diagram 68 also stipulates that, when the aforementioned relative distance is within the normal range NA, as the relative distance between the vehicle 12 and the front vehicle 45 becomes longer, the display distance of the front vehicle image 60 gradually becomes longer. However, in the display position determination diagram 68, the relative distance between the vehicle 12 and the front vehicle 45 is not proportional to the display distance of the front vehicle image 60. Here, as shown in FIG. Fig.10 As shown, in the case where the aforementioned relative distance is at any first distance LG1 included in the normal range NA, the display distance of the front vehicle image 60 is defined as the first display distance DLG1. In the case where the aforementioned relative distance is included in the normal range NA and is at any second distance LG2 longer than the first distance LG1, the display distance of the front vehicle image 60 is defined as the second display distance DLG2. In the case where the aforementioned relative distance is included in the normal range NA and is at any third distance LG3 longer than the second distance LG2, the display distance of the front vehicle image 60 is defined as the third display distance DLG3. In the case where the aforementioned relative distance is included in the normal range NA and is at any fourth distance LG4 longer than the third distance LG3, the display distance of the front vehicle image 60 is defined as the fourth display distance DLG4. Furthermore, the display position determination diagram 68 stipulates that the second distance change amount, which is a value obtained by subtracting the third display distance DLG3 from the fourth display distance DLG4 and dividing it by the third display distance DLG3, is smaller than the first distance change amount, which is a value obtained by subtracting the first display distance DLG1 from the second display distance DLG2 and dividing it by the first display distance DLG1. Fig.10As shown, the graph (function) representing the relationship between the relative distance between the vehicle 12 and the front vehicle 45 within the normal range NA and the display distance of the front vehicle image 60 is a curve rather than a straight line. Therefore, when the display distance of the front vehicle image 60 on the display device 18 changes based on the display position determination map 68, the vehicle occupant who is viewing the front vehicle image 60 is even less likely to feel a sense of discomfort than when the vehicle occupant views the front vehicle image 60 whose display distance changes based on the display position determination map 64.

[0085] The present disclosure can be Fig.11 and Fig.12 The third variant example shown is implemented in the form of. In this case, as Fig.11 As shown, it is assumed that the vehicle 12 is traveling in the first lane 71 which is the leftmost lane of the road 70, and the road 70 has three lanes, namely the first lane 71, the second lane 72 and the third lane 73. In addition, the front vehicles (relative moving bodies) 75-1, 75-2, 75-3 located ahead of the vehicle 12 are traveling in the first lane 71, the second lane 72 and the third lane 73, respectively. Here, a straight line passing along the far end (front end) of the vehicle 12 in the lateral direction (left-right direction) of the road 70 is defined as SL. Along the direction in which the road 70 extends, the respective distances from the straight line SL to the front vehicles 75-1, 75-2, 75-3 are defined as the relative distances between the vehicle 12 and the front vehicles 75-1, 75-2, 75-3, respectively. Fig.11 In the illustrated state, the relative distances between the vehicle 12 and the leading vehicles 75-1, 75-2, and 75-3 are the same. In other words, the leading vehicles 75-1, 75-2, and 75-3 are aligned in the left-right direction.

[0086] Therefore, the first lane image 81, the second lane image 82, and the third lane image 83 corresponding to the first lane 71, the second lane 72, and the third lane 73, respectively, are included in Fig.12 80 is shown in the road image 80 displayed on the display device 18. In addition, a front vehicle image (moving image) 85-1 corresponding to the front vehicle 75-1 is displayed on the first lane image 81, a front vehicle image (moving image) 85-2 corresponding to the front vehicle 75-2 is displayed on the second lane image 82, and a front vehicle image (moving image) 85-3 corresponding to the front vehicle 75-3 is displayed on the third lane image 83. The front vehicle images 85-1, 85-2, 85-3 are arranged in the left-right direction on the display device 18. In addition, the front vehicle images 85-1, 85-2, 85-3 are displayed on the display device 18 as vehicles of the same vehicle type.

[0087] Here, if Fig.11As shown, a range where the distance from the left and right directions of the vehicle 12 is less than or equal to a predetermined distance (for example, 6 m) is defined as a normal range NA. Fig.11 In the example of , the range between the left-right position of the vehicle 12 and the left-right position of the front vehicle 75-2 is the normal range NA. That is, in the left-right direction, the relative distance between the front vehicle 75-2 and the vehicle 12 is the maximum value when the relative distance is within the normal range NA. On the other hand, the third lane 73 is outside the normal range NA. In this case, Fig.12 As shown, the front vehicle image 85-2 is displayed on the display device 18 as an image smaller than the front vehicle image 85-1. On the other hand, the front vehicle image 85-2 and the front vehicle image 85-3 are displayed on the display device 18 with the same size. In this way, in the case where the relative distance between the vehicle 12 and the relative moving body in the left-right direction is within the normal range NA, the size of the relative moving body (the front vehicle 75-2) changes according to the relative distance. That is, in the case where the relative distance between the vehicle 12 and the relative moving body in the left-right direction is within the normal range NA, the longer the relative distance, the smaller the size of the relative moving body becomes. On the other hand, in the case where the relative distance between the vehicle 12 and the relative moving body (the front vehicle 75-3) in the left-right direction is outside the normal range NA, the size of the front vehicle image 85-3 corresponding to the relative moving body on the display device 18 is maintained at the same size as the front vehicle image 85-2, which is the size when the relative distance to the vehicle 12 is the maximum value when the relative distance is within the normal range NA. In this way, in the third modified example, the present disclosure is applied to the case where the direction of the relative distance between the vehicle 12 and the relatively moving body is the left-right direction. Therefore, in the display device 18 of the third modified example, when the relative distance between the vehicle 12 and the relatively moving body in the left-right direction is outside the normal range NA, it is difficult for the vehicle occupant who is viewing the display device 18 to feel a sense of incongruity.

[0088] Note that the technical concept of the third modified example can be applied to the display positions (display distances) of the front vehicle images 85 - 1 , 85 - 2 , 85 - 3 on the display device 18 .

[0089] The present disclosure can be Fig.13 The fourth variant example shown is implemented in the form of. In this case, as Fig.13As shown, it is assumed that the vehicle 12 is traveling in the first lane 71 of the road 70. In the fourth modified example, the distance between the vehicle 12 and the relatively moving body located around the vehicle 12 connected by a straight line is the relative distance between the vehicle 12 and the relatively moving body. Therefore, for example, a position located in front of the vehicle 12 and at a predetermined distance from the vehicle 12 can be represented by an arc centered on the vehicle 12. Therefore, the normal range NA based on the vehicle 12 is defined by a fan shape centered on the vehicle 12. Therefore, for example, the display device 18 is displayed with a fan shape corresponding to the vehicle 12. Fig.12 The front vehicle image 85-2 is displayed in the same size as the front vehicle image 85-2 of the normal range NA. Fig.13 On the other hand, a front vehicle image ( FIG. 10 ) showing the front vehicle 75-3 traveling in the third lane 73 within the normal range NA is displayed on the display device 18. Fig.13 ), so as to be larger than the front vehicle image 85-3.

[0090] The display control ECU 26 may be provided with only one of the image size determination map 62 (66) and the display position determination map 64 (68). That is, when the relative distance between the vehicle 12 and the relative moving body changes, the size of the moving image representing the relative moving body and displayed on the display device 18 or the display position of the moving image on the display device 18 may not change.

[0091] When the relative distance between the vehicle 12 and the relatively moving object is within the first special range SA1 or the second special range SA2, the size of the moving image representing the relatively moving object and displayed on the display device 18 or the display position of the moving image on the display device 18 can be changed according to the relative distance.

[0092] The moving image may be an image different from the front vehicle image. For example, the moving image may be at least one of an image representing a pedestrian, an image representing a motorcycle, an image representing a large vehicle such as a truck or a bus, an image representing a pole fixed to the ground, and an image representing a guardrail fixed to the ground, which are detected by the sensor unit 20.

[0093] The display device of the present disclosure may be a device other than the display device 18. For example, the display device may be a HUD (Head Up Display).

[0094] The minimum value of the general range NA may be a length different from 10 m. For example, the minimum value of the general range NA may be any value between 3 and 10 m. Similarly, the maximum value of the general range NA may be a length different from 110 m. For example, the maximum value of the general range NA may be any value between 100 and 130 m.

Claims

1. A display device for a vehicle, which is provided on the vehicle and is capable of displaying a moving image representing a relatively moving object when a detection device detects a relatively moving object around the vehicle within a predetermined detection range, in: When the relative distance between the relatively moving object and the vehicle is within a normal range, the display device for the vehicle changes a display condition according to the relative distance, the display condition being at least one of a size and a display position of the moving image, and In a case where the relative distance is outside the normal range, the display device for a vehicle does not change the display condition.

2. The display device for a vehicle according to claim 1, wherein: When the relative distance is within the normal range, the display device for a vehicle causes the moving image to gradually become smaller as the relative distance becomes longer, and Considering that when the relative distance is within the normal range, the size of the moving image when the relative distance becomes a maximum value is defined as a minimum size, the display device for a vehicle makes the size of the moving image when the relative distance is outside the normal range and has become greater than the maximum value the minimum size.

3. The display device for a vehicle according to claim 1 or claim 2, wherein: When the relative distance is within the normal range, the display device for a vehicle causes the moving image to gradually become smaller as the relative distance becomes longer, and Considering that when the relative distance is within the normal range, the size of the moving image when the relative distance becomes the minimum value is defined as the maximum size, the display device for the vehicle makes the size of the moving image when the relative distance is outside the normal range and has become smaller than the minimum value the maximum size.

4. The display device for a vehicle according to claim 1, wherein: When the relative distance is within the normal range, the display device for a vehicle causes the moving image to gradually become smaller as the relative distance becomes longer, and Considering: In the case where the relative distance within the normal range is at an arbitrary first distance, the size of the moving image is defined as a first size, In a case where the relative distance within the normal range is at any second distance longer than the first distance, the size of the moving image is defined as a second size, In a case where the relative distance within the normal range is at any third distance longer than the second distance, the size of the moving image is defined as a third size, and In a case where the relative distance within the normal range is at any fourth distance longer than the third distance, the size of the moving image is defined as a fourth size, The display device for a vehicle makes a second size change amount, which is a value obtained by subtracting the fourth size from the third size and dividing it by the third size, smaller than a first size change amount, which is a value obtained by subtracting the second size from the first size and dividing it by the first size.

5. The display device for a vehicle according to claim 1, wherein: The display device for a vehicle is capable of displaying a vehicle image representing the vehicle, In a case where the relative distance is within the normal range, the display device for a vehicle causes a display distance to gradually become longer as the relative distance becomes longer, the display distance being the distance between the vehicle image and the moving image, and Considering that when the relative distance is within the normal range, the displayed distance when the relative distance becomes the maximum value is defined as the maximum distance, the display device for the vehicle makes the displayed distance when the relative distance is outside the normal range and has become greater than the maximum value the maximum distance.

6. The display device for a vehicle according to claim 1 or claim 5, wherein: The display device for a vehicle is capable of displaying a vehicle image representing the vehicle, In a case where the relative distance is within the normal range, the display device for a vehicle causes a display distance to gradually become longer as the relative distance becomes longer, the display distance being the distance between the vehicle image and the moving image, and Considering that when the relative distance is within the normal range, the displayed distance when the relative distance becomes the minimum value is defined as the minimum distance, the display device for the vehicle makes the displayed distance when the relative distance is outside the normal range and has become less than the minimum value the minimum distance.

7. The display device for a vehicle according to claim 1, wherein: The display device for a vehicle is capable of displaying a vehicle image representing the vehicle, In a case where the relative distance is within the normal range, the display device for a vehicle causes a display distance to gradually become longer as the relative distance becomes longer, the display distance being the distance between the vehicle image and the moving image, and Considering: In the case where the relative distance within the normal range is at any first distance, the display distance is defined as a first display distance, In the case where the relative distance within the normal range is at any second distance longer than the first distance, the displayed distance is defined as a second displayed distance, In a case where the relative distance within the normal range is at any third distance longer than the second distance, the display distance is defined as a third display distance, and In a case where the relative distance within the normal range is at any fourth distance longer than the third distance, the display distance is defined as a fourth display distance, The display device for a vehicle makes a second distance change amount, which is a value obtained by subtracting the third display distance from the fourth display distance and dividing it by the third display distance, smaller than a first distance change amount. The second distance change amount is a value obtained by subtracting the first display distance from the second display distance and dividing it by the first display distance.

8. The display device for a vehicle according to claim 1 or claim 2, wherein: The vehicle is capable of performing driving assistance control, and The display device for a vehicle changes a size of the normal range according to a level of the driving assistance control.

9. The display device for a vehicle according to claim 8, wherein The display device for a vehicle expands the normal range as the level of the driving assistance control increases.

10. The display device for a vehicle according to claim 8, wherein The display device for a vehicle causes the maximum value of the normal range to become larger as the level of the driving assist control increases.

11. A display method for a vehicle, which is capable of displaying a moving image representing a relatively moving object when a detection device detects a relatively moving object around the vehicle within a predetermined detection range by means of a display device provided on the vehicle: When the relative distance between the relatively moving object and the vehicle is within a normal range, changing a display condition according to the relative distance, the display condition being at least one of a size and a display position of the moving image; and When the relative distance is outside the normal range, the display condition is not changed.

12. A computer-readable recording medium storing a program executable by a processor to perform a process, the process comprising: When the detection device detects a relatively moving object located around the vehicle within a predetermined detection range, the display device provided on the vehicle displays a moving image representing the relatively moving object; When the relative distance between the relatively moving object and the vehicle is within a normal range, changing a display condition according to the relative distance, the display condition being at least one of a size and a display position of the moving image; and When the relative distance is outside the normal range, the display condition is not changed.

Images