On-vehicle display system and control method of on-vehicle display system

Abstract

To provide an on-vehicle display system which notifies a user of the situation based on a target inter-vehicle distance between an own vehicle and a preceding vehicle.SOLUTION: An on-vehicle display system mounted on an own vehicle to display a situation around the own vehicle on a display in a cabin comprises: a target inter-vehicle distance acquisition part which acquires a target inter-vehicle distance of vehicle speed control of the own vehicle relative to a preceding vehicle ahead of the own vehicle; and a display control part which displays, when the preceding vehicle is detected, an own vehicle icon and a preceding vehicle icon on a traveling lane area shown on the display. At least a first preceding vehicle display position ahead of the own vehicle icon and a second preceding vehicle display position between the first preceding vehicle display position and the own vehicle icon are configured. The display control part displays, when the target inter-vehicle distance is changed from a first set distance to a second set distance, the preceding vehicle icon to be moved closer from the first preceding vehicle display position to the second preceding vehicle display position on the display as the inter-vehicle distance becomes closer from the first set distance to the second set distance.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an in-vehicle display system and a control method for an in-vehicle display system. [Background technology]

[0002] Japanese Patent Application Laid-Open Publication No. 2023-117717 is a known technical document related to an in-vehicle display system. This publication describes a vehicle control device that indicates the status of the device's recognition of other vehicles by displaying a leading vehicle icon at a fixed position on a display inside the vehicle cabin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-117717 Summary of the Invention [Problem to be solved by the invention]

[0004] However, as with the above-mentioned device, since the display area of the display is limited, it is known that a preceding vehicle icon is displayed at a fixed position on the display. When controlling the host vehicle, such as adjusting the vehicle speed, based on the distance between the host vehicle and the preceding vehicle, a target inter-vehicle distance is set as a control target. There is a demand for an intuitively understandable display of this target inter-vehicle distance using a preceding vehicle icon on the display, rather than a numerical value. [Means for solving the problem]

[0005] One aspect of the present invention is an in-vehicle display system that is mounted on a vehicle and displays the situation around the vehicle on a display inside the vehicle cabin, and includes a target inter-vehicle distance acquisition unit that acquires a target inter-vehicle distance for the vehicle's speed control relative to a preceding vehicle traveling in front of the vehicle, and a display control unit that displays a vehicle icon and a preceding vehicle icon on a driving lane area displayed on the display when a preceding vehicle is detected.The driving lane area is set to at least a first preceding vehicle display position in front of the vehicle icon and a second preceding vehicle display position sandwiched between the first preceding vehicle display position and the vehicle icon.The display control unit displays the preceding vehicle icon on the display at the first preceding vehicle display position when the target inter-vehicle distance is a first set distance, and displays the preceding vehicle icon on the display at the second preceding vehicle display position when the target inter-vehicle distance is a second set distance that is smaller than the first set distance, and when the target inter-vehicle distance is changed from the first set distance to the second set distance, moves the preceding vehicle icon on the display from the first preceding vehicle display position to the second preceding vehicle display position as the inter-vehicle distance between the preceding vehicle and the vehicle approaches from the first set distance to the second set distance.

[0006] According to one aspect of the in-vehicle display system of the present invention, a preceding vehicle icon is displayed at a predetermined position according to the target inter-vehicle distance, and when the target inter-vehicle distance is changed, the preceding vehicle icon is moved to match the change in the actual inter-vehicle distance, thereby appropriately conveying to the user the situation between the vehicle and the preceding vehicle according to the target inter-vehicle distance.

[0007] In an in-vehicle display system according to one aspect of the present invention, when the distance between the subject vehicle and the preceding vehicle becomes less than the approach judgment threshold, regardless of the target inter-vehicle distance, the display control unit may display the preceding vehicle icon at a position in the driving lane area closer to the subject vehicle icon than the second preceding vehicle display position, and may move the preceding vehicle icon so that it approaches the subject vehicle icon as the distance between the subject vehicle and the preceding vehicle becomes shorter. This in-vehicle display system can appropriately convey information about the distance between the vehicle and the preceding vehicle to the user when the vehicle and the preceding vehicle approach each other.

[0008] In an in-vehicle display system according to one aspect of the present invention, when the target inter-vehicle distance is changed from a first set distance to a second set distance, the display control unit may move the preceding vehicle icon so that the preceding vehicle icon reaches a second preceding vehicle display position when the inter-vehicle distance between the preceding vehicle and the subject vehicle reaches the second set distance. This in-vehicle display system can properly notify the user of the timing when the adjustment of the inter-vehicle distance in response to a change in the target inter-vehicle distance has been completed.

[0009] Another aspect of the present invention is a control method for an in-vehicle display system that is mounted on a vehicle and displays the situation around the vehicle on a display inside the vehicle cabin, the control method obtaining a target inter-vehicle distance for the vehicle's speed control relative to a preceding vehicle traveling in front of the vehicle, and when a preceding vehicle is detected, displaying a vehicle icon and a preceding vehicle icon on a driving lane area displayed on the display, the driving lane area having at least a first preceding vehicle display position in front of the vehicle icon and a second preceding vehicle display position sandwiched between the first preceding vehicle display position and the vehicle icon set, when the target inter-vehicle distance is a first set distance, the preceding vehicle icon is displayed on the display at the first preceding vehicle display position, and when the target inter-vehicle distance is a second set distance that is smaller than the first set distance, the preceding vehicle icon is displayed on the display at the second preceding vehicle display position, and when the target inter-vehicle distance is changed from the first set distance to the second set distance, the preceding vehicle icon is moved on the display from the first preceding vehicle display position to approach the second preceding vehicle display position as the inter-vehicle distance between the preceding vehicle and the vehicle approaches from the first set distance to the second set distance.

[0010] According to another aspect of the control method for an in-vehicle display system of the present invention, the preceding vehicle is displayed at a predetermined position according to the target inter-vehicle distance, and when the target inter-vehicle distance is changed, the preceding vehicle icon is moved to match the change in the actual inter-vehicle distance, thereby appropriately conveying information regarding the target inter-vehicle distance to the user. [Effects of the Invention]

[0011] According to each aspect of the present invention, the conditions between the host vehicle and the preceding vehicle according to the target inter-vehicle distance can be properly communicated to the user. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a block diagram showing an in-vehicle display system according to an embodiment; [Figure 2] FIG. 10 is a diagram illustrating an example of a display. [Figure 3] 3(a) is a plan view showing an example of the actual situation of the host vehicle and the preceding vehicle, and FIG. 3(b) is a diagram for explaining an example of a display corresponding to FIG. [Figure 4] 4(a) is a plan view showing an example of a situation in which the target inter-vehicle distance has been switched to a second set distance, and FIG. 4(b) is a diagram for explaining an example of a display corresponding to FIG. [Figure 5] 5(a) is a plan view showing an example of a situation in which the actual inter-vehicle distance falls below the approach determination threshold, and FIG. 5(b) is a diagram for explaining an example of a display corresponding to FIG. [Figure 6] 10A is a flowchart illustrating an example of a preceding vehicle icon display process, and FIG. 10B is a flowchart illustrating an example of a preceding vehicle icon display position change process. [Figure 7] 10A is a flowchart showing an example of an approach determination process, and FIG. 10B is a flowchart showing another example of a preceding vehicle icon display position change process. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0014] Fig. 1 is a block diagram showing an embodiment of an in-vehicle display system 100. The in-vehicle display system 100 shown in Fig. 1 is mounted on a vehicle such as a passenger car or a freight vehicle (hereinafter referred to as the host vehicle), and is a device that displays images according to the surrounding conditions of the vehicle.

[0015] The host vehicle has a function of controlling the speed of the host vehicle so that the distance between the host vehicle and a preceding vehicle traveling in front of the host vehicle on the traveling lane of the host vehicle becomes a target distance. The host vehicle may have a driving assistance function such as ACC (Adaptive Cruise Control) or an automatic driving function including vehicle speed control. The target distance is a set value that serves as a reference for controlling the speed of the host vehicle relative to the preceding vehicle traveling in front of the host vehicle.

[0016] [Configuration of in-vehicle display system] The configuration of an in-vehicle display system 100 according to this embodiment will be described below with reference to the drawings. As shown in FIG. 1, the in-vehicle display system 100 includes a display control ECU (Electronic Control Unit) 10 that performs overall management of the device. The display control ECU 10 is an electronic control unit having a CPU (Central Processing Unit) and a storage unit. The storage unit is composed of, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), and an EEPROM (Electrically Erasable Programmable Read-Only Memory). The display control ECU 10 realizes various functions by, for example, executing programs stored in the storage unit in the CPU. The display control ECU 10 may be composed of multiple electronic units.

[0017] The display control ECU 10 is connected to an external sensor 1, a display 2, and a vehicle control ECU 3. The external sensor 1 is a detection device that detects the surrounding conditions of the host vehicle, such as a preceding vehicle. The external sensor 1 includes at least one of a camera and a radar sensor. The camera is an imaging device that captures images of the external conditions of the host vehicle. The camera is provided, for example, behind the windshield of the host vehicle and captures images ahead of the vehicle. The camera transmits captured images of the external conditions of the host vehicle to the display control ECU 10. The radar sensor is a detection device that detects objects around the host vehicle using radio waves (for example, millimeter waves) or light. The radar sensor includes, for example, millimeter wave radar or LiDAR (Light Detection and Ranging). The radar sensor transmits information about the detected objects to the display control ECU 10.

[0018] The display 2 is a display device provided in the cabin of the vehicle. The display 2 may be a center display, a multi-information display (MID), or a head-up display (HUD). The display 2 displays various information in response to control signals from the display control ECU 10.

[0019] The vehicle control ECU 3 is an electronic unit that controls the driving assistance function or the autonomous driving function of the host vehicle. A detailed description of the driving assistance function and the autonomous driving function will be omitted here. The vehicle control ECU 3 stores a target inter-vehicle distance set by the user of the host vehicle. The user is, for example, the driver. If the host vehicle is a fully autonomous vehicle, the user does not have to be the driver and may be a passenger.

[0020] Next, a description will be given of the functional configuration of the display control ECU 10. The display control ECU 10 has a target inter-vehicle distance acquisition unit 11 and a display control unit 12. Note that the display control ECU 10 may be composed of a plurality of electronic units.

[0021] The target inter-vehicle distance acquisition unit 11 acquires the target inter-vehicle distance set for the host vehicle from the vehicle control ECU 3. Furthermore, when the target inter-vehicle distance is changed, the target inter-vehicle distance acquisition unit 11 acquires change information of the target inter-vehicle distance. The change of the target inter-vehicle distance may be performed by a user operation, or may be automatically performed by the decision of the vehicle control ECU 3 (for example, an ECU of an automatic driving system or a driving assistance system).

[0022] The vehicle control ECU 3 may automatically change the target inter-vehicle distance based on at least one of, for example, a change in weather, a change in road surface conditions, and a change in the vehicle driving mode by the user (such as switching to sport mode or eco mode). For example, the vehicle control ECU 3 changes the target inter-vehicle distance to be longer when the weather worsens, the road surface becomes slippery, or the user switches the vehicle driving mode from standard mode to sport mode.

[0023] When a preceding vehicle is detected by the external sensor 1, the display control unit 12 displays an icon for the subject vehicle and an icon for the preceding vehicle on the driving lane area displayed on the display 2. Here, FIG. 2 is a diagram showing an example of the display. FIG. 2 shows the driving lane area RA, the left line LA1 and the right line LA2 that form the driving lane area RA, the subject vehicle icon MA, the preceding vehicle icon NA, and the parallel vehicle icon WA. Note that the display on the display 2 is not limited to the top-down display shown in FIG. 2, and various display modes that allow the user to recognize the situation around the subject vehicle can be adopted.

[0024] The display control unit 12 changes the display position of the preceding vehicle icon NA on the display in accordance with the target inter-vehicle distance acquired by the target inter-vehicle distance acquisition unit 11. Here, FIG. 3(a) is a plan view showing an example of the actual situation of the host vehicle and the preceding vehicle. FIG. 3(a) shows the host vehicle M and the preceding vehicle N. Also shown is the inter-vehicle distance D between the host vehicle M and the preceding vehicle N, and a first set distance D1 set as the target inter-vehicle distance. The first set distance D1 is a distance of a predetermined value. The first set distance D1 may be set, for example, taking into account the display area of the display 2.

[0025] FIG. 3(b) is a diagram illustrating an example of a display corresponding to FIG. 3(a). FIG. 3(b) shows a planar view of the display for ease of understanding. FIG. 3(b) shows a first preceding vehicle display position P1 where the preceding vehicle icon NA is displayed in the situation of FIG. 3(a). The first preceding vehicle display position P1 is the position where the preceding vehicle icon NA is displayed when the set value of the target inter-vehicle distance is set as the first set distance D1. The first preceding vehicle display position P1 is formed in front of the host vehicle icon MA within the driving lane area RA. The display position of the host vehicle icon MA may be fixed or may be changed according to conditions.

[0026] When the display control unit 12 detects the situation shown in Fig. 3(a) based on the detection result of the external sensor 1, it displays the preceding vehicle icon NA at the first preceding vehicle display position P1 as shown in Fig. 3(b). Note that the display control unit 12 does not display the preceding vehicle icon NA when it does not detect the preceding vehicle N.

[0027] When the target inter-vehicle distance is switched from the first set distance D1 to the second set distance D2, the display control unit 12 changes the display position of the preceding vehicle icon NA according to the actual inter-vehicle distance D between the preceding vehicle N and the host vehicle M. The second set distance D2 is shorter than the first set distance D1.

[0028] 4(a) is a plan view showing an example of a situation in which the target inter-vehicle distance has been switched to the second set distance D2. FIG. 4(a) shows the second set distance D2 and an arrow TA indicating a situation in which the inter-vehicle distance D between the host vehicle M and the preceding vehicle N is gradually shortening due to the switching of the target inter-vehicle distance.

[0029] 4(b) is a diagram illustrating an example of a display corresponding to FIG. 4(a). FIG. 4(b) shows a second preceding vehicle display position P2 and an arrow TB indicating a movement of the display position of the preceding vehicle icon NA corresponding to a reduction in the actual inter-vehicle distance D. The second preceding vehicle display position P2 is the display position of the preceding vehicle icon NA corresponding to the case where the target inter-vehicle distance is set to the second set distance D2. The second preceding vehicle display position P2 is set in front of the host vehicle icon MA within the driving lane area RA, and is closer to the host vehicle icon MA than the first preceding vehicle display position P1. The second preceding vehicle display position P2 is set to a position sandwiched between the first preceding vehicle display position P1 and the host vehicle icon MA.

[0030] As shown in FIG. 4(a), in a situation where the target inter-vehicle distance is switched from the first set distance D1 to the second set distance D2 and the inter-vehicle distance D becomes shorter, the display control unit 12 changes the display position of the preceding vehicle icon NA so that it moves from the first preceding vehicle display position P1 to the second preceding vehicle display position P2 (see FIG. 4(b)). The display control unit 12 changes the display position of the preceding vehicle icon NA so that the preceding vehicle icon NA moves closer to the second preceding vehicle display position P2 as the inter-vehicle distance D approaches from the first set distance D1 to the second set distance D2. The display control unit 12 moves the display position of the preceding vehicle icon NA so that the preceding vehicle icon NA reaches the second preceding vehicle display position P2 at the timing when the target inter-vehicle distance reaches the second set distance D2.

[0031] In a situation where the target inter-vehicle distance is switched from the second set distance D2 to the first set distance D1 and the inter-vehicle distance D increases, the display control unit 12 may change the display position of the preceding vehicle icon NA so that it approaches the first preceding vehicle display position P1 from the second preceding vehicle display position P2.

[0032] The timing for changing the display position of the preceding vehicle icon NA does not necessarily have to be precise. The display control unit 12 does not have to move the preceding vehicle icon NA to the second preceding vehicle display position P2 at the timing when the target inter-vehicle distance reaches the second set distance D2 from the first set distance D1. The timing when the preceding vehicle icon NA reaches the second preceding vehicle display position P2 may be earlier or later than the timing when the target inter-vehicle distance reaches the second set distance D2.

[0033] The first set distance D1 and the second set distance D2 are merely examples, and three or more set distances may be determined in advance. The same applies to the first preceding vehicle display position P1 and the second preceding vehicle display position P2.

[0034] When the inter-vehicle distance D between the preceding vehicle N and the subject vehicle M becomes less than the approach judgment threshold T, the display control unit 12 may change the display position of the preceding vehicle icon NA to the third preceding vehicle display position P3 regardless of the set value of the target inter-vehicle distance.

[0035] The approach determination threshold T is a threshold value that is set in advance. The approach determination threshold T is not particularly limited, but may be set to 15 m or 10 m. The approach determination threshold T may be changed to a larger value as the vehicle speed increases. The approach determination threshold T may be set to a value that is a certain value smaller than the target inter-vehicle distance. The third preceding vehicle display position P3 is set to a position in front of the host vehicle icon MA within the driving lane area RA, closer to the host vehicle icon MA than the second preceding vehicle display position P2.

[0036] FIG. 5(a) is a plan view showing an example of a situation in which the actual inter-vehicle distance D has fallen below the approach determination threshold T. FIG. 5(b) is a diagram for explaining an example of a display corresponding to FIG. 5(a). FIG. 5(b) shows an example of a third preceding vehicle display position P3. When the inter-vehicle distance D has fallen below the approach determination threshold T as shown in FIG. 5(a), the display control unit 12 changes the display position of the preceding vehicle icon NA to the third preceding vehicle display position P3, regardless of the set value of the target inter-vehicle distance.

[0037] Furthermore, when the inter-vehicle distance D remains less than the approach determination threshold T, the display control unit 12 may change the display position of the preceding vehicle icon NA in accordance with the inter-vehicle distance D. In this case, the display control unit 12 moves the preceding vehicle icon NA so that it approaches the host vehicle icon MA as the inter-vehicle distance D between the preceding vehicle N and the host vehicle M becomes shorter.

[0038] [Control method for in-vehicle display system] Next, a control method for the in-vehicle display system 100 according to this embodiment will be described with reference to the drawings. Fig. 6(a) is a flowchart showing an example of a preceding vehicle icon display process. The preceding vehicle icon display process is executed when the user turns on the display of the surrounding conditions of the vehicle.

[0039] 6(a), in S10, the display control ECU 10 of the in-vehicle display system 100 acquires a target inter-vehicle distance used for controlling the vehicle speed of the host vehicle using the target inter-vehicle distance acquisition unit 11. Thereafter, the display control ECU 10 proceeds to S11.

[0040] In S11, the display control ECU 10 determines whether or not the preceding vehicle N has been detected by the display control unit 12. If it is determined that the preceding vehicle N has been detected (S10: YES), the display control ECU 10 proceeds to S12. If it is not determined that the preceding vehicle N has been detected (S10: NO), the display control ECU 10 ends this processing.

[0041] In S12, the display control ECU 10 causes the display control unit 12 to display a preceding vehicle icon NA on the display 2. The display control unit 12 displays the preceding vehicle icon NA in the driving lane area RA, for example, as shown in FIG. 2. If the target inter-vehicle distance is the first set distance D1, the display control unit 12 displays the preceding vehicle icon NA at the first preceding vehicle display position P1 (see FIGS. 3(a) and 3(b)). Thereafter, the display control ECU 10 ends this processing.

[0042] Fig. 6(b) is a flowchart showing an example of a preceding vehicle icon display position change process. The preceding vehicle icon display position change process shown in Fig. 6(b) is executed when the preceding vehicle icon NA is displayed. Note that this process does not take place when the conditions in Fig. 7(a) described below are met.

[0043] 6(b), in S20, the display control ECU 10 determines whether the target inter-vehicle distance has been changed from the first set distance D1 to the second set distance D2 by the target inter-vehicle distance acquisition unit 11. If it is determined that the target inter-vehicle distance has been changed from the first set distance D1 to the second set distance D2 (S20: YES), the display control ECU 10 proceeds to S21. If it is not determined that the target inter-vehicle distance has been changed from the first set distance D1 to the second set distance D2 (S20: NO), the display control ECU 10 ends this processing.

[0044] In S21, the display control ECU 10 causes the display control unit 12 to change the display position of the preceding vehicle icon NA in accordance with the actual inter-vehicle distance D. As shown in Figures 4(a) and 4(b), the display control unit 12 changes the display position of the preceding vehicle icon NA so that it moves from the first preceding vehicle display position P1 to the second preceding vehicle display position P2 in accordance with the situation where the inter-vehicle distance D approaches the second preceding vehicle display position D2 from the first set distance D1. Thereafter, the display control ECU 10 ends this processing.

[0045] 7A is a flowchart showing an example of approach determination processing. As shown in FIG. 7A, the display control ECU 10 determines whether the actual inter-vehicle distance D has become less than the approach determination threshold T by the display control unit 12. If it is determined that the inter-vehicle distance D has become less than the approach determination threshold T (S30: YES), the display control ECU 10 proceeds to S31. If it is not determined that the inter-vehicle distance D has become less than the approach determination threshold T (S30: NO), the display control ECU 10 ends this processing.

[0046] In S31, the display control ECU 10 causes the display control unit 12 to change the display position of the preceding vehicle icon NA to the third preceding vehicle display position P3. In this case, the display control unit 12 changes the display position of the preceding vehicle icon NA to the third preceding vehicle display position P3 regardless of the target inter-vehicle distance. In other words, the change in the display position of the preceding vehicle icon NA due to the inter-vehicle distance D between the host vehicle M and the preceding vehicle N becoming shorter takes priority over the change in the display position of the preceding vehicle icon NA due to a change in the target inter-vehicle distance. Thereafter, the display control ECU 10 ends this processing.

[0047] Fig. 7(b) is a flowchart showing another example of the preceding vehicle icon display position change process, which is executed when the process of S31 in Fig. 7(a) is performed.

[0048] As shown in FIG. 7(b), in S40, the display control ECU 10 determines whether the actual inter-vehicle distance D continues to be less than the approach determination threshold T using the display control unit 12. If the display control ECU 10 determines that the inter-vehicle distance D continues to be less than the approach determination threshold T (S40: YES), the display control ECU 10 proceeds to S41. If the display control ECU 10 does not determine that the inter-vehicle distance D continues to be less than the approach determination threshold T (S40: NO), the display control ECU 10 ends this processing.

[0049] In S41, the display control ECU 10 causes the display control unit 12 to change the display position of the preceding vehicle icon NA in accordance with the actual inter-vehicle distance D. The display control unit 12 changes the display position of the preceding vehicle icon NA so that it approaches the host vehicle icon MA from the third preceding vehicle display position P3 as the inter-vehicle distance D becomes shorter.

[0050] According to the in-vehicle display system 100 (and its control method) of the present embodiment described above, the preceding vehicle icon NA is displayed at a predetermined position according to the target inter-vehicle distance, and when the target inter-vehicle distance is changed, the preceding vehicle icon NA is moved in accordance with the change in the actual inter-vehicle distance D, thereby making it possible to properly convey to the user the situation between the host vehicle M and the preceding vehicle N according to the target inter-vehicle distance. The user can intuitively understand the change in the target inter-vehicle distance and the change in the inter-vehicle distance D without feeling any discomfort.

[0051] Furthermore, according to the in-vehicle display system 100, when the target inter-vehicle distance is changed from the first set distance D1 to the second set distance D2, the preceding vehicle icon NA is moved to the second preceding vehicle display position P2 at the time when the inter-vehicle distance D between the preceding vehicle N and the vehicle M reaches the second set distance D2, thereby properly informing the user of the time when the adjustment of the inter-vehicle distance D in response to the change in the target inter-vehicle distance has been completed.

[0052] Furthermore, according to the in-vehicle display system 100, when the actual inter-vehicle distance D becomes less than the approach judgment threshold T, the display position of the preceding vehicle icon NA is changed to a third preceding vehicle display position P3 which is closer to the host vehicle icon MA, so that information regarding the inter-vehicle distance D can be properly conveyed to the user when the host vehicle M and the preceding vehicle N are approaching each other.

[0053] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The present invention can be embodied in various forms, including the above-described embodiments, with various modifications and improvements made based on the knowledge of those skilled in the art. [Explanation of symbols]

[0054] 1...external sensor, 2...display, 3...vehicle control ECU, 10...display control ECU, 11...target inter-vehicle distance acquisition unit, 12...display control unit, 100...in-vehicle display system, D...inter-vehicle distance, D1...first set distance, D2...second set distance, MA...host vehicle icon, M...host vehicle, NA...preceding vehicle icon, N...preceding vehicle, P1...first preceding vehicle display position, P2...second preceding vehicle display position, RA...driving lane area.

Claims

1. An in-vehicle display system that is mounted on a vehicle and displays a situation around the vehicle on a display inside the vehicle, a target inter-vehicle distance acquisition unit that acquires a target inter-vehicle distance for vehicle speed control of the host vehicle relative to a preceding vehicle traveling ahead of the host vehicle; a display control unit that displays an icon of the vehicle itself and an icon of the preceding vehicle on the driving lane area displayed on the display when the preceding vehicle is detected, In the driving lane area, at least a first preceding vehicle display position in front of the host vehicle icon and a second preceding vehicle display position sandwiched between the first preceding vehicle display position and the host vehicle icon are set, the display control unit displays the preceding vehicle icon at the first preceding vehicle display position on the display when the target inter-vehicle distance is a first set distance; When the target inter-vehicle distance is a second set distance that is smaller than the first set distance, the preceding vehicle icon is displayed at the second preceding vehicle display position on the display; When the target inter-vehicle distance is changed from the first set distance to the second set distance, the preceding vehicle icon on the display is moved from the first preceding vehicle display position to the second preceding vehicle display position as the inter-vehicle distance between the preceding vehicle and the subject vehicle approaches the second set distance from the first set distance.

2. The in-vehicle display system of claim 1, wherein when the inter-vehicle distance between the subject vehicle and the preceding vehicle becomes less than the approach judgment threshold, regardless of the target inter-vehicle distance, the display control unit displays the preceding vehicle icon at a position in the driving lane area closer to the subject vehicle icon than the second preceding vehicle display position, and moves the preceding vehicle icon so that it approaches the subject vehicle icon as the inter-vehicle distance between the preceding vehicle and the subject vehicle becomes shorter.

3. 3. The in-vehicle display system of claim 1, wherein when the target inter-vehicle distance is changed from the first set distance to the second set distance, the display control unit moves the preceding vehicle icon so that the preceding vehicle icon reaches the second preceding vehicle display position at the same time that the inter-vehicle distance between the preceding vehicle and the subject vehicle reaches the second set distance.

4. A control method for an in-vehicle display system that is mounted on a vehicle and displays a situation around the vehicle on a display inside the vehicle, comprising: acquiring a target inter-vehicle distance for vehicle speed control of the host vehicle relative to a preceding vehicle traveling ahead of the host vehicle; When the preceding vehicle is detected, a host vehicle icon and a preceding vehicle icon are displayed on the driving lane area displayed on the display; In the driving lane area, at least a first preceding vehicle display position in front of the host vehicle icon and a second preceding vehicle display position sandwiched between the first preceding vehicle display position and the host vehicle icon are set, When the target inter-vehicle distance is a first set distance, the preceding vehicle icon is displayed at the first preceding vehicle display position on the display; When the target inter-vehicle distance is a second set distance that is smaller than the first set distance, the preceding vehicle icon is displayed at the second preceding vehicle display position on the display; A control method for an in-vehicle display system, wherein when the target inter-vehicle distance is changed from the first set distance to the second set distance, the preceding vehicle icon on the display is moved from the first preceding vehicle display position to the second preceding vehicle display position as the inter-vehicle distance between the preceding vehicle and the subject vehicle approaches the second set distance from the first set distance.

Images