Display control device, method, and program

Abstract

To prevent a user from feeling anxiety when a tracking mark cannot be displayed on a display device.SOLUTION: A display control ECU which controls the display on an AR-HUD performs the first display of displaying a tracking mark at a display position of the tracking mark when the display position of the tracking mark corresponding to a preceding vehicle 90 detected by a preceding vehicle detection unit that detects the preceding vehicle 90 is within a preset display setting area 78 in a display area 74 of the AR-HUD, and performs the display of blinking a part 84 indicating the upper edge of a meter display section 80 in the meter display section 80 displayed on the outer side of the display setting area 78 in the same color as the tracking mark as the second display indicating that the preceding vehicle 90 has been detected when the display position of the tracking mark is outside the display setting area 78.SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] Patent document 1 describes a technology in which, when the position of a displayed object as seen by the driver moves outside a pre-set display setting area within the display area of ​​a head-up display (HUD), the brightness of a guide image (following mark) superimposed on the displayed object is gradually reduced, or the guide image is changed to a smaller, simplified image. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-011666 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, if the preceding vehicle is located in an area where a following mark (guidance image) cannot be displayed, such as when the distance between the vehicle and the preceding vehicle is too close, if nothing is displayed on the display device, even if the preceding vehicle detection unit that detects the preceding vehicle is able to detect the preceding vehicle, the user will not be able to know whether or not the preceding vehicle has been detected, which may cause the user to feel uneasy.

[0005] The present disclosure has been made in consideration of the above facts, and aims to provide a display control device, a display control method, and a display control program that can suppress anxiety felt by a user when a tracking mark cannot be displayed on a display device. [Means for solving the problem]

[0006] A display control device according to a first aspect includes a display control unit that performs a first display to display the following mark at a display position corresponding to a leading vehicle detected by a leading vehicle detection unit that detects the leading vehicle, when the display position is within a predetermined display setting area of ​​a display device, and performs a second display indicating that the leading vehicle has been detected, when the display position is outside the display setting area.

[0007] In the first aspect, when the display position of the following mark corresponding to the preceding vehicle is within a preset display setting area of ​​the display area of ​​the display device, a first display is performed to display the following mark at the display position of the following mark. On the other hand, when the display position of the following mark is outside the display setting area, a second display is performed to indicate that the preceding vehicle has been detected. This allows the user to recognize from the second display that the preceding vehicle has been detected, so that it is possible to suppress the user from feeling uneasy when the following mark cannot be displayed on the display device.

[0008] In a second aspect, in the first aspect, the display position of the following mark is a position overlapping or adjacent to the preceding vehicle.

[0009] According to the second aspect, compared to a case where the following mark is displayed at a position spaced from the leading vehicle, the user can intuitively recognize that the following mark corresponds to the leading vehicle.

[0010] In a third aspect, in the first aspect, the display setting area is an area excluding a meter display area on the lower side in the vehicle vertical direction from the display area, in which at least a meter display portion is displayed.

[0011] According to the third aspect, the following mark is not displayed in the meter display area on the lower side of the display area in the vertical direction of the vehicle, thereby preventing the visibility of the meter display portion, etc. displayed in the meter display area from being impaired by the following mark.

[0012] In a fourth aspect, in the first aspect, the display control unit performs, as the second display, a display that changes a display outside the display setting area.

[0013] According to the fourth aspect, it is possible to prevent the display in the display setting area from becoming cluttered as a result of performing the second display.

[0014] In a fifth aspect, in the first aspect, the display control unit performs, as the second display, a display in which a meter display unit displayed outside the display setting area is highlighted.

[0015] According to the fifth aspect, by highlighting the existing meter display portion, it is possible to prevent the display of the range outside the display setting area from becoming cluttered, while allowing the user to recognize that a preceding vehicle has been detected.

[0016] In a sixth aspect, in the first aspect, the display control unit performs, as the second display, a display that highlights a part that indicates the upper edge of the meter display portion among the meter display portion displayed outside the display setting area.

[0017] According to the sixth aspect, by highlighting the parts indicating the upper edge of the existing meter display portion, it is possible to make the user aware that a preceding vehicle has been detected while avoiding the display of the range outside the display setting area becoming cluttered.

[0018] In a seventh aspect, in the first aspect, the display control unit performs, as the second display, a display in which a frame indicating an outer edge of the display area is highlighted.

[0019] According to the seventh aspect, it is possible to make the user aware that a leading vehicle has been detected, while avoiding a display in the display area becoming cluttered.

[0020] In an eighth aspect, in the first aspect, the display control unit performs, as the second display, a predetermined icon indicating that the preceding vehicle has been detected, outside the display setting area.

[0021] According to the eighth aspect, it is possible to allow the user to intuitively recognize that a leading vehicle has been detected.

[0022] As a ninth aspect, in any of the fifth to eighth aspects, the display control section displays an object to be displayed as the second display in the same color as the following mark.

[0023] According to the ninth aspect, the object displayed as the second display can be intuitively recognized by the user as indicating that a preceding vehicle has been detected. In addition, when the display position of the following mark corresponding to the preceding vehicle returns from outside the display setting area to inside the display setting area, the following mark is displayed in the same color as the object displayed as the second display, resulting in a seamless expression and suppressing a sense of incongruity for the user.

[0024] A tenth aspect is any of the fifth to eighth aspects, wherein said display control section blinks an object to be displayed as said second display.

[0025] According to the tenth aspect, the object displayed as the second representation can be made to stand out more, and the visibility of the object displayed as the second representation can be improved.

[0026] An eleventh aspect is the first aspect, wherein the display device is a head-up display.

[0027] According to the eleventh aspect, it is possible to suppress a sense of unease felt by the user in a case where the following mark cannot be displayed on the head-up display.

[0028] A display control method according to a twelfth aspect has a computer execute a process that includes performing a first display to display a following mark corresponding to a leading vehicle detected by a leading vehicle detection unit that detects the leading vehicle when the display position of the following mark is within a predetermined display setting area of ​​a display device, and performing a second display indicating that the leading vehicle has been detected when the display position is outside the display setting area.

[0029] According to the twelfth aspect, similarly to the first aspect, it is possible to prevent the user from feeling uneasy when the following mark cannot be displayed on the display device.

[0030] The display control program of the 13th aspect causes a computer to execute processing including: when the display position of a following mark corresponding to a leading vehicle detected by a leading vehicle detection unit that detects the leading vehicle is within a predetermined display setting area of ​​a display device, performing a first display that displays the following mark at the display position; and when the display position is outside the display setting area, performing a second display indicating that the leading vehicle has been detected.

[0031] According to the thirteenth aspect, similarly to the first aspect, it is possible to prevent the user from feeling uneasy when the following mark cannot be displayed on the display device. Effect of the Invention

[0032] The present disclosure has an effect of suppressing a sense of anxiety felt by a user when a tracking mark cannot be displayed on a display device. [Brief description of the drawings]

[0033] [Figure 1] 1 is a block diagram showing a schematic configuration of an in-vehicle system according to an embodiment; [Diagram 2] FIG. 2 is a functional block diagram of a camera unit and a display control ECU. [Diagram 3]FIG. 1 is an explanatory diagram showing a schematic configuration of an AR-HUD. [Figure 4] 4 is a flowchart showing a display control process executed by a display control ECU. [Diagram 5] FIG. 13 is an image diagram showing an example of a display on an AR-HUD. [Figure 6] FIG. 13 is an image diagram showing an example of a display on an AR-HUD. [Figure 7] FIG. 13 is an image diagram showing an example of a display on an AR-HUD. [Figure 8] FIG. 13 is an image diagram showing an example of a display on an AR-HUD. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] An example of an embodiment of the present disclosure will be described in detail below with reference to the drawings. As shown in Fig. 1, an in-vehicle system 10 according to this embodiment includes a communication bus 12, to which a surrounding condition acquisition device group 14, a vehicle driving state detection sensor group 26, an ADAS (Advanced Driver-Assistance Systems)-ECU (Electronic Control Unit) 34, and a display control ECU 42 are connected. Note that Fig. 1 shows only a part of the in-vehicle system 10. In the following description, a vehicle equipped with the in-vehicle system 10 is referred to as a host vehicle.

[0035] The surrounding condition acquisition device group 14 includes a GNSS (Global Navigation Satellite System) device 16, an in-vehicle communication device 18, a navigation system 20, a radar device 22, and a camera unit 24 as devices that acquire information describing the condition of the surrounding environment of the vehicle.

[0036] The GNSS device 16 receives GNSS signals from multiple GNSS satellites to determine the position of the vehicle. The in-vehicle communication device 18 performs at least one of vehicle-to-vehicle communication with other vehicles and road-to-vehicle communication with roadside devices. The navigation system 20 includes a map information storage unit 20A that stores map information, and performs processing to display the position of the vehicle on a map and determine and guide the route to the destination based on the position information obtained from the GNSS device 16 and the map information stored in the map information storage unit 20A.

[0037] The radar device 22 detects objects such as pedestrians and other vehicles around the vehicle as point cloud information, and obtains the relative positions and relative speeds of the detected objects and the vehicle. The radar device 22 also excludes noise, roadside objects such as guardrails, and the like from the monitoring targets based on the changes in the relative positions and relative speeds of each object, and outputs information such as the relative positions and relative speeds of the monitored objects such as pedestrians and other vehicles.

[0038] The camera unit 24 captures the surroundings of the vehicle with multiple cameras and outputs the captured images. Although not shown, the camera unit 24 incorporates a central processing unit (CPU), memories such as a read only memory (ROM) and a random access memory (RAM), and non-volatile storage units such as a hard disk drive (HDD) and a solid state drive (SSD). The storage unit stores a predetermined program for causing the CPU of the camera unit 24 to function as a leading vehicle detection unit 70 (see FIG. 2). The leading vehicle detection unit 70 recognizes a vehicle ahead of the vehicle that is captured in an image in front of the vehicle captured by multiple cameras, and detects and outputs the distance between the vehicle and the leading vehicle. Alternatively, the radar device 22 detects and outputs a distance calculated by combining the depth to the leading vehicle and the direction of the leading vehicle detected by the camera.

[0039] In addition, the vehicle driving condition detection sensor group 26 includes a steering angle sensor 28 that detects the steering angle of the vehicle, a vehicle speed sensor 30 that detects the driving speed of the vehicle, and an acceleration sensor 32 that detects the acceleration applied to the vehicle, as multiple sensors that acquire the vehicle driving condition.

[0040] The ADAS-ECU 34 is connected to a throttle ACT 36 that changes the throttle opening of the vehicle, a brake ACT 38 that changes the braking force generated by the braking device of the vehicle, and a steering ACT 40 that changes the steering amount by the steering device of the vehicle.

[0041] The ADAS-ECU 34 includes a CPU, memories such as ROM and RAM, non-volatile storage units such as HDD and SSD, and a communication I / F (Interface). The storage units store ADAS software. When the autonomous driving mode is selected, the ADAS-ECU 34 performs autonomous driving processing to automatically drive the vehicle without the driver's operation when the autonomous driving mode is selected, by executing the autonomous driving software through the CPU.

[0042] The autonomous driving process is a process that determines the situation of the vehicle and its surroundings based on information obtained from the surrounding situation acquisition device group 14 and the vehicle driving state detection sensor group 26, and controls the throttle ACT 36, the brake ACT 38, and the steering ACT 40. One example of the autonomous driving process is ACC (Adaptive Cruise Control), which makes the vehicle travel so as to follow a preceding vehicle recognized by the camera unit 24.

[0043] The display control ECU 42 includes a CPU 44, a memory 46 such as a ROM or a RAM, a non-volatile storage unit 48 such as a HDD or an SSD, and a communication I / F 50. The CPU 44, the memory 46, the storage unit 48, and the communication I / F 50 are connected to each other via an internal bus 52 so as to be able to communicate with each other. A display control program 54 is stored in the storage unit 48. The display control ECU 42 functions as a display control unit 72 shown in FIG. 2 by reading the display control program 54 from the storage unit 48 and loading it into the memory 46, and the display control program 54 loaded into the memory 46 is executed by the CPU 44, and performs a display control process described later.

[0044] The display control ECU 42 is connected to an AR (Augmented Reality)-head-up display (hereinafter, referred to as AR-HUD) 56 and a meter display 68. The AR-HUD 56 according to this embodiment is a small HUD that uses a part of the forward field of vision of a user who is an occupant of the vehicle as a display area (forms an image below the foreground) by reflection on the windshield glass or the like, as shown by the display area 74 in FIG. 5. The meter display 68 is a display provided on the instrument panel of the vehicle. The display control ECU 42 controls the display of information on the AR-HUD 56 and the meter display 68.

[0045] As shown in FIG. 3, the AR-HUD 56 includes a light source unit 58 made of an LED (Light Emitting Diode) or the like, and a transmissive display unit 60 made of an LCD (Liquid Crystal Display) or the like is disposed on the light emission side of the light source unit 58. A convex mirror 62 and a concave mirror 64 are disposed in this order on the light emission side of the display unit 60, and light transmitted through the display unit 60 is reflected by the convex mirror 62 and the concave mirror 64 in this order and irradiated onto the windshield of the vehicle. The optical system of the AR-HUD 56 is designed so that an image (such as a following mark to be described later) displayed on the display unit 60 is formed on a virtual image surface 66 that is inclined with respect to the vertical direction of the vehicle and suspended in the air at a distance L1 to L2 from the user. This allows the user to have the illusion that the image formed on the virtual image surface 66 is superimposed on the road surface.

[0046] However, in the AR-HUD 56, when a vehicle ahead of the vehicle is within a distance range of 0 m to L1+α from the vehicle, the display position of the following mark corresponding to the preceding vehicle falls outside the display setting area 78 described below, and therefore the following mark cannot be displayed within the display setting area 78. Note that α is an increase in the display limit distance associated with not displaying the following mark in the meter display area 76.

[0047] The display control ECU 42 is an example of a display control device according to the present disclosure, the display control program 54 is an example of a display control program according to the present disclosure, and the AR-HUD 56 is an example of a display device.

[0048] Next, as an operation of this embodiment, a display control process executed by the display control ECU 42 (display control unit 72) while the ignition switch of the host vehicle is turned on will be described with reference to FIG.

[0049] In step 150 of the display control process, the display control unit 72 controls the AR-HUD 56 so that a meter display unit 80 and the like are displayed in a meter display area 76 located on the lower side in the vehicle up-down direction of a display area 74 of the AR-HUD 56, as shown in Fig. 5 for example. As shown in Fig. 5, the meter display unit 80 includes a character display unit 82 that displays the vehicle speed and the like of the vehicle in characters, and a part 84 that indicates the upper edge of the meter display unit 80. The part 84 is usually displayed in white.

[0050] Note that the information displayed in the meter display area 76 is not limited to the meter display unit 80, and it is possible to display information such as a mark indicating no overtaking or characters indicating a vehicle speed limit by switching the display mode of the AR-HUD 56. Also, the area excluding the meter display area 76 from the display area 74 of the AR-HUD 56 (the area indicated by reference numeral 78 in FIG. 5) is an example of a display setting area in the present disclosure, and will be referred to as the display setting area 78 below.

[0051] In step 152, the display control unit 72 determines whether or not the AR display condition is satisfied. In this embodiment, the display control unit 72 determines that the AR display condition is satisfied when the ADAS-ECU 34 is executing ACC. When the ADAS-ECU 34 is not executing ACC, the determination in step 152 is negative and the process returns to step 150. On the other hand, when the ADAS-ECU 34 is executing ACC, the determination in step 152 is positive and the process proceeds to step 154.

[0052] In step 154, the display control unit 72 acquires from the preceding vehicle detection unit 70 (camera unit 24) the distance L to the preceding vehicle that the host vehicle is to follow in ACC by the ADAS-ECU 34. Then, in step 156, the display control unit 72 determines, based on the acquired distance L to the preceding vehicle, whether or not a following mark 92 to be displayed adjacent to an image 90 of the preceding vehicle visible to the user through the windshield, as shown in FIG.

[0053] The display control unit 72 acquires the distance L to the preceding vehicle from the camera unit 24, converts the acquired distance L to the preceding vehicle into a depression angle φ on the AR-HUD 56, and recognizes the display position of the following mark 92 on the AR-HUD 56 from the converted depression angle φ. For this reason, the determination in step 156 by the display control unit 72 may be made by comparing the distance L to the preceding vehicle with a threshold value Lth and determining whether L>Lth or not, or may be made by comparing the depression angle φ with a threshold value φth and determining whether φ<φth or not.

[0054] If the following mark 92 can be displayed within the display setting area 78, the determination in step 156 is affirmative, and the process proceeds to step 158. Then, in step 158, the display control unit 72 displays the following mark 92 at a position corresponding to (adjacent to) the image 90 of the preceding vehicle within the display setting area 78, as shown in FIG. 5, and returns to step 150. An example of the display color of the following mark 92 is light blue or green. Displaying the following mark 92 at a position corresponding to the image 90 of the preceding vehicle allows the user to recognize that the preceding vehicle has been detected normally.

[0055] The display in step 158 (the display shown in FIG. 5) is an example of a first display in the present disclosure. In addition, the example in FIG. 5 shows a mode in which the following mark 92 is displayed in a position adjacent to the image 90 of the leading vehicle, but the following mark 92 may be displayed in a position where it partially overlaps (overlaps) with the image 90 of the leading vehicle, or may be displayed in a position spaced apart from the image 90 of the leading vehicle.

[0056] In addition, when the distance to the preceding vehicle becomes narrower and the distance to the preceding vehicle becomes L≦Lth (or the depression angle φ≧φth), so that the display position of the following mark 92 is outside the display setting area 78, the determination in step 156 is negative and the process proceeds to step 160. Note that, when a vehicle traveling in a lane adjacent to the lane in which the host vehicle is traveling suddenly cuts in front of the host vehicle, the determination in step 156 is also negative and the process proceeds to step 160. In step 160, the display control unit 72 causes the part 84 indicating the upper edge of the meter display unit 80 to flash in the same color as the following mark 92 instead of displaying the following mark 92, as shown in FIG. 6, and returns to step 150. Note that the color same as the following mark 92 in this case also includes a color that has at least one difference of hue, brightness, and saturation within a predetermined value from the display color of the following mark 92.

[0057] In this way, by flashing the part 84 of the meter display unit 80 in the same color as the following mark 92, the user can recognize that a preceding vehicle has been detected even when the following mark 92 is not displayed, and the user's sense of anxiety is suppressed. Note that the display in step 160 (the display shown in FIG. 6) is an example of the second display in the present disclosure.

[0058] Furthermore, if the distance to the preceding vehicle increases and the distance to the preceding vehicle becomes L>Lth (or the depression angle φ<φth), causing the display position of the following mark 92 corresponding to the image 90 of the preceding vehicle to return from outside the display setting area 78 back into the display setting area 78, the determination in step 156 becomes positive and the process proceeds to step 158. Therefore, the following mark 92 of the same color as the part 84 of the meter display unit 80 is displayed within the display setting area 78, resulting in a seamless expression and preventing the user from feeling uncomfortable.

[0059] As described above, the display control ECU 42 according to this embodiment includes a display control unit 72 that performs a first display to display the following mark 92 at the display position of the following mark 92 when the display position of the following mark 92 corresponding to the image 90 of the preceding vehicle detected by the preceding vehicle detection unit 70 that detects the preceding vehicle is within a preset display setting area 78 of the display area 74 of the AR-HUD 56, and performs a second display indicating that a preceding vehicle has been detected when the display position of the following mark 92 is outside the display setting area 78. This allows the user to recognize that a preceding vehicle has been detected from the second display, and prevents the user from feeling uneasy when the following mark 92 cannot be displayed on the AR-HUD 56.

[0060] In this embodiment, the display position of the following mark 92 is a position that overlaps or is adjacent to the image 90 of the leading vehicle. This allows the user to intuitively recognize that the following mark 92 corresponds to the image 90 of the leading vehicle, as compared to a case in which the following mark 92 is displayed at a distance from the image 90 of the leading vehicle.

[0061] In this embodiment, the display setting area 78 is an area obtained by excluding the meter display area 76 on the lower side in the vehicle vertical direction of the display area 74, in which at least the meter display portion 80 is displayed, from the display area 74. As a result, the following mark 92 is not displayed in the meter display area 76 on the lower side in the vehicle vertical direction of the display area 74, so that it is possible to prevent the following mark 92 from impairing the visibility of the meter display portion 80 and the like displayed in the meter display area 76.

[0062] Furthermore, in this embodiment, the display control unit 72 performs, as the second display, a display that changes the display outside the display setting area 78. This makes it possible to prevent the display within the display setting area 78 from becoming cluttered due to the second display being performed.

[0063] Furthermore, in this embodiment, the display control unit 72 performs, as the second display, a display in which a part 84 indicating the upper edge of the meter display unit 80 is highlighted among the meter display unit 80 displayed outside the display setting area 78. This makes it possible to prevent the display of the range outside the display setting area 78 from becoming cluttered, while allowing the user to recognize that a leading vehicle has been detected.

[0064] Furthermore, in this embodiment, the display control unit 72 displays the object (part 84 in this embodiment) displayed as the second display in the same color as the following mark 92. This allows the user to intuitively recognize that the object (part 84) displayed as the second display indicates that a preceding vehicle has been detected. Furthermore, when the display position of the following mark 92 corresponding to the image 90 of the preceding vehicle returns from outside the display setting area 78 back into the display setting area 78, the following mark 92 is displayed in the same color as the object (part 84) displayed as the second display, resulting in a seamless expression and suppressing the user from feeling uncomfortable.

[0065] Furthermore, in this embodiment, the display control unit 72 blinks the object (part 84) to be displayed as the second display. This makes the object (part 84) to be displayed as the second display more noticeable, and improves the visibility of the object (part 84) to be displayed as the second display.

[0066] Furthermore, in this embodiment, the display device is the AR-HUD 56. This makes it possible to prevent the user from feeling uneasy when the tracking mark cannot be displayed on the AR-HUD 56.

[0067] In the above embodiment, when the display position of the following mark 92 is outside the display setting area 78, the part 84 indicating the upper edge of the meter display unit 80 is flashed in the same color as the following mark 92 to highlight the part 84, but the present disclosure is not limited to this. For example, the part 84 may be highlighted by displaying the part 84 in the same color as the following mark 92 with a constant brightness, or by flashing the part 84 in a color different from the following mark 92.

[0068] In the above embodiment, the part 84 indicating the upper edge of the meter display unit 80 is highlighted when the display position of the following mark 92 is outside the display setting area 78. However, the present disclosure is not limited to this. For example, the entire meter display unit 80 may be highlighted (for example, at least one of the same color display and blinking display). In this case, the user can be made aware that a preceding vehicle has been detected while avoiding the display of the range outside the display setting area 78 from becoming complicated. In addition, for example, the frame 94 indicating the outer edge of the display area 74 (see FIG. 7) may be highlighted. In this case, the user can be made aware that a preceding vehicle has been detected while avoiding the display within the display area 74 from becoming complicated.

[0069] In the above embodiment, a mode has been described in which an already-displayed object (e.g., part 84) is highlighted as the second display when the display position of the following mark 92 is outside the display setting area 78, but the present disclosure is not limited to this. For example, when the display position of the following mark 92 is outside the display setting area 78, a predetermined icon (one example is shown as icon 96 in FIG. 8) indicating that a preceding vehicle has been detected may be displayed outside the display setting area 78. In this case, the user can intuitively recognize that a preceding vehicle has been detected.

[0070] Furthermore, in the above embodiment, an aspect in which the AR-HUD 56 is applied as a display device in the present disclosure has been described, but the present disclosure is not limited thereto, and the display device in the present disclosure may be, for example, the meter display 68, or a display disposed in the center of an instrument panel. In the AR-HUD 56, an image 90 of a preceding vehicle is visually recognized by a user through the windshield, but in a display device such as the meter display 68, an image simulating the preceding vehicle is also displayed on the display device. Such an aspect is also included within the scope of the present disclosure.

[0071] Further, although the above describes an embodiment in which the display control program 54 according to the present disclosure is pre-stored (installed) in the memory unit 48, the display control program according to the present disclosure can also be provided in a form in which it is recorded on a non-transitory recording medium such as an HDD, SSD, DVD (Digital Versatile Disc), or USB (Universal Serial Bus) memory.

[0072] The following supplementary notes are further disclosed regarding the above embodiment.

[0073] (Appendix 1) A display control device including a display control unit that performs a first display to display a following mark corresponding to a leading vehicle detected by a leading vehicle detection unit that detects the leading vehicle when the display position of the following mark is within a predetermined display setting area of ​​a display device, and performs a second display indicating that the leading vehicle has been detected when the display position is outside the display setting area.

[0074] (Appendix 2) 2. The display control device according to claim 1, wherein the display position of the following mark is a position superimposed on or adjacent to the preceding vehicle.

[0075] (Appendix 3) 3. The display control device according to claim 1, wherein the display setting area is an area excluding a meter display area on a lower side in a vertical direction of the vehicle from the display area, in which at least a meter display portion is displayed.

[0076] (Appendix 4) 4. The display control device according to claim 1, wherein the display control unit performs a display that changes a display outside the display setting area as the second display.

[0077] (Appendix 5) 4. The display control device according to claim 1, wherein the display control unit performs a display in which a meter display unit displayed outside the display setting area is highlighted as the second display.

[0078] (Appendix 6) The display control device according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the display control unit performs a display as the second display in which a part indicating an upper edge of a meter display portion among the meter display portion displayed outside the display setting area is highlighted.

[0079] (Appendix 7) 4. The display control device according to claim 1, wherein the display control unit performs, as the second display, a display in which a frame indicating an outer edge of the display area is highlighted.

[0080] (Appendix 8) The display control device according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the display control unit displays, as the second display, a predetermined icon indicating that the preceding vehicle has been detected outside the display setting area.

[0081] (Appendix 9) 9. The display control device according to any one of claims 5 to 8, wherein the display control unit displays the object to be displayed as the second display in the same color as the following mark.

[0082] (Appendix 10) 9. The display control device according to any one of supplementary notes 5 to 8, wherein the display control unit blinks an object to be displayed as the second display.

[0083] (Appendix 11) 11. The display control device according to claim 1, wherein the display device is a head-up display.

[0084] (Appendix 12) A display control method that causes a computer to execute processing including: when the display position of a following mark corresponding to a leading vehicle detected by a leading vehicle detection unit that detects the leading vehicle is within a predetermined display setting area of ​​a display device, performing a first display that displays the following mark at the display position; and when the display position is outside the display setting area, performing a second display indicating that the leading vehicle has been detected.

[0085] (Appendix 13) 13. The display control method according to claim 12, wherein the display position of the following mark is a position superimposed on or adjacent to the preceding vehicle.

[0086] (Appendix 14) The display control method according to claim 12 or 13, wherein the display setting area is an area excluding a meter display area on a lower side in the vehicle vertical direction from the display area, in which at least a meter display portion is displayed.

[0087] (Appendix 15) The display control method according to any one of Supplementary Note 12 to Supplementary Note 14, wherein the second display is a display that changes a display outside the display setting area.

[0088] (Appendix 16) The display control method according to any one of Supplementary Note 12 to Supplementary Note 14, wherein a meter display portion displayed outside the display setting area is highlighted as the second display.

[0089] (Appendix 17) The display control method according to any one of Supplementary Note 12 to Supplementary Note 14, wherein, as the second display, a part indicating an upper edge of a meter display portion among the meter display portion displayed outside the display setting area is highlighted.

[0090] (Appendix 18) The display control method according to any one of Supplementary Note 12 to Supplementary Note 14, wherein a frame indicating an outer edge of the display area is displayed in an emphasized manner as the second display.

[0091] (Appendix 19) The display control method according to any one of Supplementary Note 12 to Supplementary Note 14, wherein as the second display, a predetermined icon indicating that the preceding vehicle has been detected is displayed outside the display setting area.

[0092] (Appendix 20) 20. The display control method according to any one of claims 16 to 19, wherein the object to be displayed as the second display is displayed in the same color as the following mark.

[0093] (Appendix 21) 20. The display control method according to any one of claims 16 to 19, wherein the object to be displayed as the second display is displayed in a blinking manner.

[0094] (Appendix 22) 22. The display control device according to claim 12, wherein the display device is a head-up display.

[0095] (Appendix 23) On the computer, A display control program for executing a process including: when the display position of a following mark corresponding to a preceding vehicle detected by a preceding vehicle detection unit that detects the preceding vehicle is within a predetermined display setting area of ​​a display device, performing a first display that displays the following mark at the display position; and when the display position is outside the display setting area, performing a second display indicating that the preceding vehicle has been detected.

[0096] (Appendix 24) 24. The display control program according to claim 23, wherein the display position of the following mark is a position superimposed on or adjacent to the preceding vehicle.

[0097] (Appendix 25) The display control program according to claim 23 or 24, wherein the display setting area is an area excluding a meter display area on a lower side in the vehicle vertical direction from the display area, in which at least a meter display portion is displayed.

[0098] (Appendix 26) 26. The display control program according to any one of claims 23 to 25, wherein the second display is a display that changes a display outside the display setting area.

[0099] (Appendix 27) 26. The display control program according to claim 23, wherein a meter display portion displayed outside the display setting area is highlighted as the second display.

[0100] (Appendix 28) The display control program according to any one of Supplementary Note 23 to Supplementary Note 25, which displays, as the second display, a part indicating an upper edge of a meter display portion displayed outside the display setting area in a highlighted manner.

[0101] (Appendix 29) 26. The display control program according to claim 23, wherein the second display is a display in which a frame indicating an outer edge of the display area is highlighted.

[0102] (Appendix 30) 26. The display control program according to any one of claims 23 to 25, wherein the second display is a predetermined icon indicating that the preceding vehicle has been detected, which is displayed outside the display setting area.

[0103] (Appendix 31) 31. The display control program according to any one of claims 27 to 30, wherein an object to be displayed as the second display is displayed in the same color as the following mark.

[0104] (Appendix 32) 31. The display control program according to any one of claims 27 to 30, wherein an object to be displayed as the second display is displayed in a blinking manner.

[0105] (Appendix 33) 33. The display control program according to claim 23, wherein the display device is a head-up display. [Explanation of symbols]

[0106] 10 In-vehicle systems 24 Camera unit 42 Display control ECU 54 Display Control Program 56 AR-HUD 70 Leading vehicle detection unit 72 Display control section 74 Display area 76 Meter display area 78 Display settings area 80 Meter display 84 parts 90 Statue of the leading vehicle 92 Follower Mark 94 slots 96 Icons

Claims

1. A display control device including a display control unit that performs a first display to display a following mark corresponding to a leading vehicle detected by a leading vehicle detection unit that detects the leading vehicle when the display position of the following mark is within a predetermined display setting area of ​​a display device, and performs a second display indicating that the leading vehicle has been detected when the display position is outside the display setting area.

2. 2. The display control device according to claim 1, wherein the display position of the following mark is a position superimposed on or adjacent to the preceding vehicle.

3. 2. The display control device according to claim 1, wherein the display setting area is an area obtained by excluding a meter display area on a lower side in a vertical direction of the vehicle from the display area, in which at least a meter display portion is displayed.

4. The display control device according to claim 1 , wherein the display control unit performs, as the second display, a display that changes a display outside the display setting area.

5. The display control device according to claim 1 , wherein the display control unit performs, as the second display, a display in which a meter display unit displayed outside the display setting area is highlighted.

6. The display control device according to claim 1 , wherein the display control unit performs, as the second display, a display in which a part indicating an upper edge of a meter display portion, among parts of a meter display portion displayed outside the display setting area, is highlighted.

7. The display control device according to claim 1 , wherein the display control unit performs, as the second display, a display in which a frame indicating an outer edge of the display area is highlighted.

8. The display control device according to claim 1 , wherein the display control unit performs a display, as the second display, of a predetermined icon indicating that the preceding vehicle has been detected, outside the display setting area.

9. 9. The display control device according to claim 5, wherein the display control unit displays the object to be displayed as the second display in the same color as the following mark.

10. 9. The display control device according to claim 5, wherein the display control unit blinks an object to be displayed as the second display.

11. The display control device according to claim 1 , wherein the display device is a head-up display.

12. A display control method in which a computer executes a process including: when the display position of a following mark corresponding to a preceding vehicle detected by a preceding vehicle detection unit that detects the preceding vehicle is within a predetermined display setting area of ​​a display device, performing a first display to display the following mark at the display position; and when the display position is outside the display setting area, performing a second display indicating that the preceding vehicle has been detected.

13. On the computer, A display control program for executing a process including: when the display position of a following mark corresponding to a preceding vehicle detected by a preceding vehicle detection unit that detects the preceding vehicle is within a predetermined display setting area of ​​a display device, performing a first display that displays the following mark at the display position; and when the display position is outside the display setting area, performing a second display indicating that the preceding vehicle has been detected.

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