Vehicle display control device, method, and program, and vehicle display system

Abstract

A display control device for a vehicle is provided with a memory and a processor connected to the memory, and when an occupant needs to hold a steering wheel, the steering wheel needs to be held by the occupant, the steering wheel needs to be held by the occupant, and the steering wheel needs to be held by the occupant. The processor causes a display unit provided in a cabin to display a guide image for requesting a holding of a steering wheel for the occupant, and when the holding of the steering wheel is requested for the occupant before switching from automatic driving to manual driving while the automatic driving of the vehicle is continued. The processor causes the display unit to emphasize the display of the guide image compared with a case in which an occupant requests continuation of holding of a steering wheel during continuation of automatic driving of the vehicle.

Description

[0001] This application is a divisional application of the application with the application number 202110769441.8 and the invention title "Vehicle Display Control Device, Method and Program, Vehicle Display System" filed with the China National Patent Office on July 7, 2021. Technical Field

[0002] The present invention relates to a vehicle display control device, a vehicle display system, a vehicle display control method, and a vehicle display control program. Background Art

[0003] In Japanese Unexamined Patent Application Publication No. 2019-10929, a technology related to a driving assistance device mounted on a vehicle such as an automobile is disclosed. For example, in a vehicle, when switching from autonomous driving to manual driving, it is necessary to notify the driver (occupant) in advance of the situation of wanting to change driving. In this case, in the prior art described in Japanese Unexamined Patent Application Publication No. 2019-10929, a guiding image for placing a hand on the steering wheel (handle) is largely displayed in the central part of the instrument display, and the occupant is guided to hold the steering wheel (so-called hands-on request). That is, in order to make the occupant hold the steering wheel through this guiding image, it is necessary to display this guiding image conspicuously.

[0004] However, if the request for holding the steering wheel is made to the occupant at a high frequency in order to be displayed conspicuously as described above, the occupant will feel cumbersome. Therefore, there is room for improvement in this regard. Summary of the Invention

[0005] In consideration of the above facts, the present disclosure provides a vehicle display control device, a vehicle display system, a vehicle display control method, and a vehicle display control program that can make a guiding image conspicuous in a scenario where the necessity for an occupant to hold the steering wheel is high and reduce the cumbersome feeling of the guiding image in a scenario where the necessity for an occupant to hold the steering wheel is low.

[0006] The vehicle display control device according to the first aspect of the present application includes a memory and a processor connected to the memory. When it is necessary for an occupant to hold the steering wheel, the processor causes a display unit provided in the vehicle compartment to display a guiding image for requesting the occupant to hold the steering wheel. When requesting the occupant to hold the steering wheel before switching from autonomous driving to manual driving during the continuation of autonomous driving of the vehicle, compared with the case of continuing to request the occupant to hold the steering wheel during the continuation of autonomous driving of the vehicle, the processor causes the display unit to emphasize the display of the guiding image.

[0007] In the vehicle display control device of the first mode, a processor is provided. When it is necessary for an occupant to hold the steering wheel, the processor causes a display unit provided inside the vehicle compartment to display a guidance image for requesting the occupant to hold the steering wheel.

[0008] Here, during the continuation of the vehicle's autonomous driving, the processor emphasizes the display of the guidance image when requesting the occupant to hold the steering wheel before switching from autonomous driving to manual driving compared to the guidance image when requesting the occupant to continue holding the steering wheel.

[0009] When the vehicle is to switch from autonomous driving to manual driving, if the occupant does not hold the steering wheel, the vehicle cannot be switched to manual driving. Therefore, in this case, the vehicle is forced to stop. On the other hand, during the continuation of the vehicle's autonomous driving, when the request for the occupant to hold the steering wheel continues, there is no situation where the vehicle is forced to stop due to the occupant not holding the steering wheel.

[0010] Therefore, when requesting the occupant to hold the steering wheel before switching from autonomous driving to manual driving compared to when the request for the occupant to hold the steering wheel continues during the continuation of autonomous driving, the necessity for the occupant to hold the steering wheel is higher in the former case than in the latter case.

[0011] Therefore, in the first mode, the display unit emphasizes (makes conspicuous) the display of the guidance image (first guidance image) when requesting the occupant to hold the steering wheel before switching from autonomous driving to manual driving compared to the guidance image (second guidance image) when the request for the occupant to hold the steering wheel continues during the continuation of autonomous driving.

[0012] Thereby, the first guidance image is made more conspicuous than the second guidance image. On the other hand, since the second guidance image is not as conspicuous as the first guidance image, the annoyance felt by the occupant can be reduced when the request for the occupant to hold the steering wheel continues during the continuation of autonomous driving.

[0013] Among them, examples of the "display unit" include a head-up display, an instrument display, a center display, etc.

[0014] In addition, "emphasize the guidance image" means making the guidance image conspicuous by increasing the density of the guidance image, increasing the brightness, or increasing the size of the guidance image, making the guidance image conspicuous through the position of the guidance image, blinking, etc.

[0015] The vehicle display control device according to the second aspect of the present disclosure includes a memory and a processor connected to the memory. When it is necessary for an occupant to hold the steering wheel, the processor causes a display unit provided inside the vehicle compartment to display a guidance image for requesting the occupant to hold the steering wheel. During the continuation of the vehicle's autonomous driving, when the situation of requesting the occupant to hold the steering wheel before the occurrence of the vehicle event is compared with the situation of continuing to request the occupant to hold the steering wheel, the processor causes the display unit to emphasize and display the guidance image.

[0016] In the vehicle display control device according to the second aspect, a processor is provided. When it is necessary for an occupant to hold the steering wheel, the processor causes a display unit provided inside the vehicle compartment to display a guidance image for requesting the occupant to hold the steering wheel.

[0017] Here, the "vehicle event" is, for example, the vehicle's merging, the vehicle's lane change, the vehicle's entry into an intersection, etc. In the present invention, the processor causes the guidance image in the case of requesting the occupant to hold the steering wheel before the occurrence of the vehicle event during the continuation of the vehicle's autonomous driving to be emphasized and displayed more than the guidance image in the case of continuing to request the occupant to hold the steering wheel.

[0018] Since in the so-called vehicle event, it is not known what will happen, it is necessary to guard against unpredictable situations and request the occupant to hold the steering wheel before the occurrence of the vehicle event. Moreover, when the situation of requesting the occupant to hold the steering wheel before the occurrence of the vehicle event during the continuation of the vehicle's autonomous driving is compared with the situation of continuing to request the occupant to hold the steering wheel during the continuation of the autonomous driving, the former has a higher necessity for the occupant to hold the steering wheel compared to the latter.

[0019] Therefore, the display unit is caused to emphasize (make prominent) the display of the guidance image (the third guidance image) in the case of requesting the occupant to hold the steering wheel before the occurrence of the vehicle event during the continuation of the autonomous driving compared to the guidance image (the second guidance image) in the case of continuing to request the occupant to hold the steering wheel during the continuation of the autonomous driving.

[0020] Thereby, in the second aspect, the third guidance image is made more prominent than the second guidance image. On the other hand, since the second guidance image is not as prominent as the third guidance image, the annoyance felt by the occupant can be reduced in the case of continuing to request the occupant to hold the steering wheel during the continuation of the autonomous driving.

[0021] The vehicle display control device according to the third aspect of the present disclosure is completed based on the vehicle display control device according to the first aspect. During the continuation of the vehicle's autonomous driving, before an event of the vehicle occurs, when a request is made to the occupant to hold the steering wheel compared to the case where the request to the occupant to hold the steering wheel continues, the processor causes the display unit to emphasize and display the guidance image.

[0022] In the vehicle display control device according to the third aspect, the processor causes the guidance image in the case where a request is made to the occupant to hold the steering wheel before an event of the vehicle occurs during the continuation of autonomous driving to be emphasized and displayed compared to the guidance image in the case where the request to the occupant to hold the steering wheel continues during the continuation of autonomous driving.

[0023] In the third aspect, before an event of the vehicle occurs during the continuation of autonomous driving, when a request is made to the occupant to hold the steering wheel compared to the case where the request to the occupant to hold the steering wheel continues during the continuation of autonomous driving, the necessity for the occupant to hold the steering wheel becomes higher in the former compared to the latter.

[0024] Therefore, in the third aspect, the display unit is caused to emphasize and display the guidance image (third guidance image) in the case where a request is made to the occupant to hold the steering wheel before an event of the vehicle occurs during the continuation of autonomous driving compared to the guidance image (second guidance image) in the case where the request to the occupant to hold the steering wheel continues during the continuation of autonomous driving.

[0025] Thereby, in the present invention, the third guidance image is made more conspicuous than the second guidance image. On the other hand, since the second guidance image is not as conspicuous as the third guidance image, the annoyance felt by the occupant can be reduced in the case where the request to the occupant to hold the steering wheel continues during the continuation of autonomous driving.

[0026] The vehicle display control device according to the fourth aspect of the present disclosure is completed based on the vehicle display control device according to the third aspect. During the continuation of the vehicle's autonomous driving, when a request is made to the occupant to hold the steering wheel before switching from autonomous driving to manual driving, compared to the case where a request is made to the occupant to hold the steering wheel before an event of the vehicle occurs, the processor causes the display unit to emphasize and display the guidance image.

[0027] When the vehicle is to be switched from autonomous driving to manual driving, if the occupant does not hold the steering wheel, the vehicle cannot be switched to manual driving. Therefore, in this case, the vehicle is forcibly stopped. On the other hand, before an event occurs during the continuation of autonomous driving, the occupant is requested to hold the steering wheel. However, in this case, the possibility of the vehicle being forcibly stopped due to the occupant not holding the steering wheel is very low. That is, when the occupant is requested to hold the steering wheel before switching from autonomous driving to manual driving and when the occupant is requested to hold the steering wheel before an event occurs during the continuation of autonomous driving, the former has a higher necessity for the occupant to hold the steering wheel compared to the latter.

[0028] In the vehicle display control device of the fourth mode, the display unit emphasizes the display of a guidance image (first guidance image) when the occupant is requested to hold the steering wheel before the vehicle is switched from autonomous driving to manual driving compared to a guidance image (third guidance image) when the occupant is requested to hold the steering wheel before an event occurs during the continuation of autonomous driving.

[0029] Thereby, the first guidance image is made more conspicuous than the third guidance image. That is, by changing the guidance image according to the degree of necessity for the occupant to hold the steering wheel, the guidance image can be made more conspicuous in a scenario where the necessity for the occupant to hold the steering wheel is high.

[0030] The vehicle display control device of the fifth mode of the present disclosure is completed on the basis of the vehicle display control device of any one of the first mode, the third mode, and the fourth mode. The above processor calculates at least one of the distance and time until switching from autonomous driving to manual driving. When at least one of the distance and time is shorter than a preset threshold, the display unit emphasizes the display of the above guidance image compared to the case where at least one of the distance and time is longer than the above threshold.

[0031] In the vehicle display control device of the fifth mode, the processor calculates at least one of the distance and time until switching from autonomous driving to manual driving. Moreover, if at least one of the distance and time is shorter than a preset threshold, the necessity for the occupant to hold the steering wheel becomes higher compared to the case where at least one of the distance and time is longer than the preset threshold.

[0032] Therefore, the display unit emphasizes the display of a guidance image (fourth guidance image) when at least one of the distance and time until switching from autonomous driving to manual driving is shorter than a preset threshold compared to a guidance image (fifth guidance image) when at least one of the distance and time is longer than the preset threshold. That is, in the present invention, the fourth guidance image can be made more conspicuous than the fifth guidance image to urge the occupant to pay attention and be reminded.

[0033] The vehicle display control device according to the sixth aspect of the present disclosure is completed on the basis of the vehicle display control devices according to the second and fifth aspects. The processor calculates at least one of the distance and time until a vehicle event occurs, and when at least one of the distance and time is shorter than a preset threshold, the display unit emphasizes and displays the guidance image more than when at least one of the distance and time is longer than the threshold.

[0034] In the vehicle display control device according to the sixth aspect, the processor calculates at least one of the distance and time until a vehicle event occurs during the continuation of the autonomous driving. Moreover, if at least one of the distance and time is shorter than a preset threshold, the necessity for the occupant to request the grip of the steering wheel becomes higher than when at least one of the distance and time is longer than the preset threshold.

[0035] Therefore, the display unit emphasizes and displays the guidance image (the fourth guidance image) when at least one of the distance and time until a vehicle event occurs is shorter than a preset threshold more than the guidance image (the fifth guidance image) when at least one of the distance and time is longer than the preset threshold. That is, the fourth guidance image can be made more conspicuous than the fifth guidance image to urge the occupant to pay attention to the reminder.

[0036] The vehicle display control device according to the seventh aspect of the present disclosure is completed on the basis of the vehicle display control device according to any one of the first to third aspects. When the grip of the steering wheel is requested from the occupant, the size of the guidance image is increased, the brightness of the guidance image is increased, or the guidance image is displayed at a conspicuous position to emphasize the guidance image compared to when the continuation of the grip of the steering wheel is requested from the occupant.

[0037] In the vehicle display control device according to the seventh aspect, compared with the case where the continuation of the grip of the steering wheel is requested from the occupant, the guidance image can be emphasized by increasing the size of the guidance image. In addition, the brightness of the guidance image can be increased, or the guidance image can be displayed at a conspicuous position to emphasize the guidance image.

[0038] The vehicle display system according to the eighth aspect of the present disclosure includes: a vehicle display control device according to the first aspect; and a display unit provided in the vehicle compartment and displaying a guidance image for requesting the occupant to grip the steering wheel.

[0039] In the vehicle display system of the eighth mode, a vehicle display control device and a display unit are provided. In the vehicle display control device, during the continuation of the vehicle's autonomous driving, the guidance image when the occupant is requested to hold the steering wheel before switching from autonomous driving to manual driving is emphasized more than the guidance image when the occupant is requested to continue holding the steering wheel. Moreover, when the occupant's hold on the steering wheel is required, the guidance image for requesting the occupant to hold the steering wheel is displayed on the display unit provided inside the vehicle compartment.

[0040] Therefore, the display unit can display the guidance image (the first guidance image) when the occupant is requested to hold the steering wheel before switching from autonomous driving to manual driving more prominently (conspicuously) than the guidance image (the second guidance image) when the occupant is requested to continue holding the steering wheel during the continuation of autonomous driving.

[0041] On the other hand, since the second guidance image is not as conspicuous as the first guidance image, the annoyance felt by the occupant can be reduced when the occupant is requested to continue holding the steering wheel during the continuation of autonomous driving.

[0042] The vehicle display system of the ninth mode of the present disclosure includes: a vehicle display control device of the second mode; and a display unit provided inside the vehicle compartment and displaying a guidance image for requesting the occupant to hold the steering wheel.

[0043] In the vehicle display system of the ninth mode, a vehicle display control device and a display unit are provided. In the vehicle display control device, during the continuation of the vehicle's autonomous driving, the guidance image when the occupant is requested to hold the steering wheel before an event of the vehicle occurs is emphasized more than the guidance image when the occupant is requested to continue holding the steering wheel. Moreover, when the occupant's hold on the steering wheel is required, the guidance image for requesting the occupant to hold the steering wheel is displayed on the display unit provided inside the vehicle compartment.

[0044] Therefore, the display unit can display the guidance image (the third guidance image) when the occupant is requested to hold the steering wheel before an event of the vehicle occurs during the continuation of autonomous driving more prominently (conspicuously) than the guidance image (the second guidance image) when the occupant is requested to continue holding the steering wheel during the continuation of autonomous driving.

[0045] On the other hand, since the second guidance image is not as conspicuous as the third guidance image, the annoyance felt by the occupant can be reduced when the occupant is requested to continue holding the steering wheel during the continuation of autonomous driving.

[0046] The vehicle display control method according to the 10th aspect of the present disclosure executes, by a computer, a process including the following: during the continuation of the autonomous driving of the vehicle, making a guidance image in a case where a grip on the steering wheel is requested of an occupant before switching from autonomous driving to manual driving be emphasized more than a guidance image in a case where the continuation of the grip on the steering wheel is requested of the occupant.

[0047] In the vehicle display control method according to the 10th aspect, it is possible to make it easy for an occupant to recognize the necessity of the occupant's grip on the steering wheel according to the importance.

[0048] The vehicle display control method according to the 11th aspect of the present disclosure executes, by a computer, a process including the following: during the continuation of the autonomous driving of the vehicle, making a guidance image in a case where a grip on the steering wheel is requested of an occupant before an event of the vehicle occurs be emphasized more than a guidance image in a case where the continuation of the grip on the steering wheel is requested of the occupant.

[0049] In the vehicle display control method according to the 11th aspect, it is possible to make it easy for an occupant to recognize the necessity of the occupant's grip on the steering wheel according to the importance.

[0050] The non-transitory storage medium storing the vehicle display control program according to the 12th aspect of the present disclosure causes a computer to execute a process including the following: during the continuation of the autonomous driving of the vehicle, making a guidance image in a case where a grip on the steering wheel is requested of an occupant before switching from autonomous driving to manual driving be emphasized more than a guidance image in a case where the continuation of the grip on the steering wheel is requested of the occupant.

[0051] In the vehicle display control program according to the 12th aspect, it is possible to make it easy for an occupant to recognize the necessity of the occupant's grip on the steering wheel according to the importance.

[0052] The non-transitory storage medium storing the vehicle display control program according to the 13th aspect of the present disclosure causes a computer to execute a process including the following: during the continuation of the autonomous driving of the vehicle, making a guidance image in a case where a grip on the steering wheel is requested of an occupant before an event of the vehicle occurs be emphasized more than a guidance image in a case where the continuation of the grip on the steering wheel is requested of the occupant.

[0053] In the vehicle display control program according to the 13th aspect, it is possible to make it easy for an occupant to recognize the necessity of the occupant's grip on the steering wheel according to the importance.

[0054] As described above, the vehicle display control device, vehicle display system, vehicle display control method, and non-transitory storage medium storing a vehicle display control program according to the present disclosure have an excellent effect of making the guidance image conspicuous in a scene where the necessity for an occupant to hold the steering wheel is high and reducing the annoyance of the guidance image felt by the occupant in a scene where the necessity for an occupant to hold the steering wheel is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Preferred embodiments will be described in detail with reference to the following drawings, where

[0056] Figure 1 is a schematic perspective view of the front part of the interior of a vehicle to which the vehicle display control device according to the embodiment of the present disclosure is applied, as viewed from the rear side of the vehicle.

[0057] Figure 2 is a block diagram showing the hardware configuration of the vehicle display control device according to the embodiment of the present disclosure.

[0058] Figure 3 is a block diagram showing the functional configuration of the vehicle display control device according to the embodiment of the present disclosure.

[0059] Figure 4A is a front view showing a display example of the HUD of a vehicle to which the vehicle display control device according to the embodiment of the present disclosure is applied during normal driving.

[0060] Figure 4B is a front view showing a display example of the MET of a vehicle to which the vehicle display control device according to the embodiment of the present disclosure is applied during normal driving.

[0061] Figure 5A is a front view showing a display example of the icon D2 of the HUD of an operation request performed before switching from autonomous driving to manual driving in a vehicle to which the vehicle display control device according to the embodiment of the present disclosure is applied.

[0062] Figure 5B is a front view showing a display example of the icon D1 of the MET of an operation request performed before switching from autonomous driving to manual driving in a vehicle to which the vehicle display control device according to the embodiment of the present disclosure is applied.

[0063] Figure 6A is a front view showing a display example of the icon D4 of the HUD of an operation request performed before switching from autonomous driving to manual driving in a vehicle to which the vehicle display control device according to the embodiment of the present disclosure is applied.

[0064] Figure 6BThe front view shows an example of the display of icon D3 of the MET that represents an actual operation request before switching from autonomous driving to manual driving in a vehicle equipped with the vehicle display control device according to an embodiment of the present disclosure.

[0065] Figure 7 The front view shows an example of the display of the MET during normal driving of a vehicle equipped with the vehicle display control device according to an embodiment of the present disclosure.

[0066] Figure 8 The front view shows an example of the display of icons D5 and D6 of the MET that represent an actual operation request before an event in a vehicle equipped with the vehicle display control device according to an embodiment of the present disclosure.

[0067] Figure 9 The front view shows an example of the display of icon D5 of the MET that represents an actual operation request before an event in a vehicle equipped with the vehicle display control device according to an embodiment of the present disclosure.

[0068] Figure 10 The front view shows an example of the display of icon D7 of the MET that represents an actual operation request before an event in a vehicle equipped with the vehicle display control device according to an embodiment of the present disclosure.

[0069] Figure 11 The front view shows an example of the display of icon D8 of the MET that represents a request to continue the actual operation in a vehicle equipped with the vehicle display control device according to an embodiment of the present disclosure.

[0070] Figure 12 The flowchart shows an example of the process of the display process in an embodiment of the present disclosure.

[0071] Figure 13 The flowchart shows an example of the process of the display process in an embodiment of the present disclosure. Detailed Embodiment

[0072] A vehicle 12 equipped with a vehicle display control device 10 according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. Here, the vehicle 12 of the present embodiment is configured to be able to switch between autonomous driving and manual driving. Here, autonomous driving is a driving mode of a vehicle in which part or all of the driving operations (operations such as accelerator, brake, turn indicator, steering wheel, pedal operation, etc.) are automatically performed. In addition, manual driving is a driving mode of a vehicle in which the driver performs all of these driving operations.

[0073] As Figure 1As shown, an instrument panel 14 is provided at the front part of the passenger compartment 13 of the vehicle 12. The instrument panel 14 extends in the vehicle width direction, and a steering wheel 16 is provided on the right side of the vehicle of the instrument panel 14. That is, in the present embodiment, as an example, it is a so-called right-hand drive vehicle with the steering wheel 16 provided on the right side, and the driver's seat is set on the right side of the vehicle. In addition, a windshield 18 is provided at the front end of the instrument panel 14.

[0074] The windshield 18 extends from the front end of the instrument panel 14 toward the upper side of the vehicle to divide the outside of the passenger compartment of the vehicle 12 from the inside of the passenger compartment 13. In addition, both end portions in the vehicle width direction of the windshield 18 are attached to the front end portions of the front pillars 20, and the front end portion of the front side glass 22 is fixed to the rear end portion of the front pillar 20. And the upper end portion of the windshield 18 in the vehicle is attached to a front seat head panel (front header panel, not shown), and the front seat head panel is configured such that the vehicle width direction is the length direction at the front end of the roof panel (not shown) covering the passenger compartment 13 from above.

[0075] Here, in the instrument panel 14, an instrument display (display unit; hereinafter referred to as "MET") 24 is provided at a position that enters the field of view in a state where the driver (occupant) looks straight ahead on the back side of the steering wheel 16.

[0076] On the other hand, a head-up display (display unit; hereinafter referred to as "HUD") 26 is provided on the windshield 18. The HUD 26 is set on the upper side of the vehicle of the MET 24 and is composed of a projection surface projected by a head-up display device 44 (see Figure 2 ). Among them, the head-up display device 44 is provided at a position closer to the front side of the vehicle than the instrument panel 14 and is configured to project an image from the head-up display device 44 onto the HUD 26 of the windshield 18.

[0077] (Hardware Structure of Vehicle Display Control Device 10)

[0078] An ECU (Electronic Control Unit) 28 as a control unit of the vehicle display control device 10 is provided in the vehicle 12. Figure 2 It is a block diagram showing the hardware structure of the vehicle display control device 10.

[0079] As shown in this Figure 2As shown, the ECU 28 of the vehicle display control device 10 is configured to include a CPU (Central Processing Unit), a processor 30, a ROM (Read Only Memory) 32, a RAM (Random Access Memory) 34, a storage 36, a communication interface (communication I / F) 38, and an input / output interface (input / output I / F) 40. Each component is connected via a bus 42 so as to be able to communicate with each other.

[0080] The CPU 30 is a central processing unit that, for example, executes a vehicle display control program and controls each part. That is, the CPU 30 reads the vehicle display control program from the ROM 32 or the storage 36 and executes the vehicle display control program using the RAM 34 as a working area. The CPU 30 controls the above-mentioned respective components and performs various arithmetic processes according to the vehicle display control program recorded in the ROM 32 or the storage 36.

[0081] The ROM 32 stores the vehicle display control program and various data. The RAM 34 temporarily stores the vehicle display control program or data as a working area. The storage 36 is composed of an HDD (Hard Disk Drive) or an SSD (Solid State Drive) and stores the vehicle display control program including the operating system and various data. In the present embodiment, a vehicle display control program for performing display processing and various data are stored in the ROM 32 or the storage 36.

[0082] The communication I / F 38 is an interface for enabling the vehicle display control device 10 to communicate with a server (not shown) and other devices. For example, standards such as Ethernet (registered trademark), LTE, FDDI, and Wi-Fi (registered trademark) can be used.

[0083] Connected to the input / output I / F 40 are a MET 24, a head-up display device (HUD device) 44 that projects an image onto the HUD 26, an actuator 46, and a grip sensor 48. In addition, connected to the input / output I / F 40 are sensors (not shown) and a GPS device for enabling the vehicle 12 (refer to Figure 1 ) to automatically drive.

[0084] Here, the actuator 46 is configured to include a steering actuator, an acceleration actuator, and a braking actuator. The steering actuator steers the vehicle 12, and the acceleration actuator accelerates the vehicle 12. In addition, the braking actuator decelerates the vehicle 12 by controlling the brakes.

[0085] On the other hand, the grip sensor 48 can detect the situation where the occupant grips the steering wheel 16. Therefore, as the grip sensor 48, for example, a pressure sensor that can detect the pressure acting on the steering wheel 16 when the occupant grips the steering wheel 16 can be cited. In addition to this, as the grip sensor 48, a contact sensor that can detect the contact of the occupant with the steering wheel 16, a life sensor that can detect the pulse, blood pressure, sweating, etc. of the occupant when the steering wheel 16 is gripped, etc. can also be used.

[0086] (Functional Structure of Vehicle Display Control Device 10)

[0087] The vehicle display control device 10 uses the above-mentioned hardware resources to implement various functions. Refer to Figure 3 To describe the functional structure implemented by the vehicle display control device 10.

[0088] As Figure 3 shown, the vehicle display control device 10 is configured to include a communication unit 50, an autonomous driving control unit 54, a MET display instruction unit 56, a HUD display instruction unit 58, a grip determination unit 60, and a display control unit 62 as functional structures. Among them, each functional structure is implemented by the CPU 30 shown in Figure 2 reading and executing the vehicle display control program stored in the ROM 32 or the storage 36.

[0089] The communication unit 50 performs data transmission and reception with an external server and other devices via the communication I / F 38 (refer to Figure 2 ). For example, it performs data transmission and reception of map data and traffic conditions stored in the server. In addition, the communication unit 50 may also be configured to perform vehicle-to-vehicle communication with surrounding vehicles.

[0090] The autonomous driving control unit 54 makes the vehicle 12 automatically drive while considering the position information and the environmental information around the vehicle 12 (refer to Figure 1 ). Specifically, it makes the vehicle 12 automatically drive by controlling the actuator 46 (refer to Figure 2 ). In addition, in the autonomous driving control unit 54, the driving is switched between the automatic driving and the manual driving of the vehicle 12.

[0091] The MET display instruction unit 56 causes the MET 24 (refer to Figure 2)Displays a third-person multi-lane display image. The third-person multi-lane display image is an image that looks down on the vehicle from the rear upper side and uses the vehicle's own lane and the adjacent lanes on the left and right as the display objects. By removing non-existent lanes from the display objects, the maximum number of lanes is three under normal conditions, but it is not limited to this. The vehicle itself is displayed as an icon in the third-person multi-lane display image. For example, when changing the lane of the vehicle itself, in a situation where the lane change is suspended until other vehicles pass due to the approach of other vehicles from the right rear or left rear and then the lane change is made, the third-person multi-lane display image can display the approach of other vehicles, the situation of suspending the lane change, etc.

[0092] Here, FIG. 4(B) shows a display example of MET24 when the vehicle 12 is traveling normally. As shown in FIG. 4(B), the set speed during cruise control and the current speed of the vehicle 12 are displayed at the upper part of the display area of MET24. The set speed and the vehicle speed are displayed at the center in the vehicle width direction in the display area of MET24. The set speed is displayed smaller below, and here, as an example, it is set to 100 km / h. In addition, the current vehicle speed is displayed above and is shown as 98 km / h. Therefore, the vehicle 12 is set to travel at a speed within 100 km / h while maintaining a constant inter-vehicle distance from the vehicle ahead.

[0093] In addition, an icon V1 simulating the vehicle itself, an icon V2 simulating the surrounding vehicles, and an icon V3 are displayed at the center of the display area of MET24. By observing the icon V1, it can be seen that the vehicle itself is traveling in the middle lane of the three-lane driving lane. In addition, the icons V2 and V3 are respectively displayed based on the information detected by sensors (not shown) mounted on the vehicle 12. Moreover, by observing the icons V2 and V3, it can be seen that there are vehicles traveling in front of the vehicle itself and in the right front oblique direction of the vehicle itself.

[0094] Among them, the position of the vehicle itself can be detected by a GPS device mounted on the vehicle 12. In addition, as sensors for detecting surrounding vehicles, a combination of sensors such as a stereo camera, an ultrasonic sensor, a millimeter-wave radar, and a lidar is used. In addition, it can also be configured to be able to grasp the position of the vehicle itself and the positions of surrounding vehicles through vehicle-to-vehicle communication with surrounding vehicles.

[0095] The HUD display instruction unit 58 causes the HUD 26 (refer to Figure 2 ) to display a first-person single-lane display image. The first-person single-lane display image is an image close to the state where the driver observes the front through the front windshield of the vehicle, and the lanes adjacent to the left and right of the vehicle's own lane are removed from the display objects. The first-person single-lane display image is an image that minimizes clutter by displaying the vehicle's own lane as large as possible and omitting the display of information that is not important for monitoring driving.

[0096] Here, a display example of the HUD 26 when the vehicle 12 is normally traveling is shown in FIG. 4(A). As shown in FIG. 4(A), the set speed during cruise control and the current speed of the vehicle 12 are displayed at the lower part in the display area of the HUD 26. The set speed and the vehicle speed are displayed at the center in the vehicle width direction in the display area of the HUD 26.

[0097] Therefore, the vehicle 12 is set to travel at a speed within 100 km / h while maintaining a constant inter-vehicle distance from the vehicle ahead. Among them, the display of the set speed and the vehicle speed is synchronized with the content of the MET 24. In addition, in the HUD 26, only the icon V2 of the vehicle traveling ahead of the own vehicle is displayed.

[0098] The grip determination unit 60 determines whether the occupant is gripping the steering wheel 16 (refer to Figure 2 ) based on the output of the grip sensor 48 (refer to Figure 1 ). For example, when the grip sensor 48 is a pressure sensor, the grip determination unit 60 determines whether the occupant is gripping the steering wheel 16 based on the pressure when the occupant grips the steering wheel 16 through the grip sensor 48. Moreover, the grip determination unit 60 outputs information indicating the determination result to the display control unit 62.

[0099] The display control unit 62 causes the MET 24 and the HUD 26 to display a guidance image for guiding the occupant to grip the steering wheel 16 based on the determination result of the grip determination unit 60 and as needed. For example, during the continuation of the autonomous driving of the vehicle 12, so-called actual operation of requesting the occupant to grip the steering wheel 16 before the vehicle 12 switches from autonomous driving to manual driving is required.

[0100] Therefore, as shown in FIGS. 5(A) and 5(B), the display control unit 62 displays the icon D1 (first guidance image) and the icon D2 (first guidance image) for gripping the steering wheel with both hands at the center in the display areas of the MET 24 and the HUD 26, respectively, to guide the occupant to grip the steering wheel 16.

[0101] In this way, by causing the MET 24 and the HUD 26 to display the icons D1 and D2 for gripping the steering wheel with both hands, respectively, the display control unit 62 can visually appeal to the occupant that it is necessary to grip the steering wheel 16 and can make the content clear at a glance.

[0102] In addition, the display control unit 62 causes the MET 24 and the HUD 26 to display specific messages such as "Please drive" and "Advanced Drive is about to end" above the icons D1 and D2, respectively. In addition, the icons D1 and D2 are also displayed on the MET 24 and the HUD 26 in a state where the occupant is gripping the steering wheel 16.

[0103] Moreover, when at least one of the distance and time from when the vehicle 12 is in autonomous driving until it switches to manual driving is equal to or less than a specified value (threshold), and the occupant still does not hold the steering wheel 16, the icons D1 and D2 shown in FIGS. 5(A) and 5(B) change to the icons D3 and D4 shown in FIGS. 6(A) and 6(B). That is, the guidance image changes to the more conspicuous icons D3 and D4 than the icons D1 and D2.

[0104] Specifically, the differences between the icons D1 and D2 and the icons D3 and D4 will be described. In the present embodiment, as shown in FIGS. 5(A) and 5(B), in the icons D1 and D2, the steering wheel and the hand are hollow, but in the icons D3 and D4 shown in FIGS. 6(A) and 6(B), the steering wheel and the hand are colored (for example, filled with a conspicuous color such as amber or fluorescence). That is, the color of the steering wheel and the hand is changed to make the icons D3 and D4 more conspicuous than the icons D1 and D2. In addition to the color, the icons D3 and D4 may also blink.

[0105] Moreover, in the present embodiment, the display control unit 62 causes the MET24 and the HUD26 to display the icons D1 to D4 when actually operating is requested from the occupant before the vehicle 12 switches from autonomous driving to manual driving more prominently than the icon D8 (the second guidance image; refer to Figure 11 ) when actually operating is requested from the occupant during the continuation of autonomous driving. Among them, Figure 11 only the display example of the MET24 is shown, but the HUD26 also performs substantially the same display as the MET24. The same applies to Figures 8 - 10 .

[0106] In addition, during the continuation of the autonomous driving of the vehicle 12, the display control unit 62 causes the MET24 and the HUD26 to display the icons D5 and D6 (the third guidance image; refer to Figure 8 ), the icon D7 (the third guidance image; refer to Figure 10 ) when actually operating is requested from the occupant before so-called events occur to the vehicle 12 such as the vehicle 12 merging, the vehicle 12 changing lanes, and the vehicle 12 entering an intersection more prominently than the icon D8 (the second guidance image; refer to Figure 11 ) when actually operating is requested from the occupant during the continuation of autonomous driving.

[0107] For example, Figures 7 - 11 shows the display example of the MET24. Figure 7 shows the display example of the MET24 during normal driving in autonomous driving. During normal driving in autonomous driving, the icon of the steering wheel is not displayed.

[0108] Before the occurrence of an event in the vehicle 12, etc., without the need for the actual operation of the occupant, such as Figure 8 , Figure 9 shown, the display control unit 62 causes the MET 24 to display the icons D5 and D6 that request the actual operation from the occupant. In addition, the display control unit 62 causes the message "Please hold the steering wheel" to be displayed.

[0109] Furthermore, the icon D5 is displayed on the left side of the three-person multi-lane display image in the central part of the display area of the MET 24, and the icon D6 is displayed on the left side of the current vehicle speed display in the upper part of the display area of the MET 24. In addition, in the icon D5, the hand part blinks, and for the icon D6, the icon itself blinks. Furthermore, Figure 8 and Figure 9 are alternately displayed.

[0110] And, if the occupant holds the steering wheel 16 (refer to Figure 1 ), then as Figure 10 shown, the display control unit 62 displays an animation (icon D7) in which the icon D5 moves and disappears. Moreover, when the animation ends, as Figure 11 shown, the display control unit 62 lights up the icon D8 and requests the occupant to continue the actual operation.

[0111] (Function and effect of vehicle display control device)

[0112] Next, the function and effect of the vehicle display control device according to the present embodiment will be described.

[0113] First, the display processing of the MET 24 and the HUD 26 shown in Figure 12 , Figure 13 will be described using the flowchart shown in Figure 2 . The CPU 30 shown in Figure 2 reads the vehicle display control program from the ROM 32 or the storage 36 and expands and executes it in the RAM 34 to execute this display processing.

[0114] First, the display processing before the vehicle 12 switches from autonomous driving to manual driving will be described.

[0115] As Figure 12 shown, in step S100, the CPU 30 checks the vehicle 12 (refer to Figure 1 ​)It is judged whether it is in autonomous driving. When it is judged that the vehicle 12 is in autonomous driving (step S100: Yes), the CPU 30 proceeds to the process of step S102. On the other hand, when it is judged that the vehicle 12 is not in autonomous driving (step S100: No), the CPU 30 ends the display process. That is, as shown in FIGS. 4(A) and 4(B), the vehicle 12 maintains the display during normal driving.

[0116] Next, in step S102, the CPU 30 judges whether the vehicle 12 is to be switched to manual driving. When it is judged that the vehicle 12 is to be switched to manual driving (step S102: Yes), the CPU 30 proceeds to the process of step S104. Among them, in step S102, this process is executed by the CPU 30 until it is judged that the vehicle 12 is to be switched to manual driving.

[0117] In step S104, the CPU 30 judges whether the occupant is holding the steering wheel 16 (refer to Figure 1 ). When it is judged that the occupant is holding the steering wheel 16 (step S104: Yes), the CPU 30 proceeds to the process of step S106.

[0118] Next, in step S106, the CPU 30 causes the MET 24 and the HUD 26 to display the icons D1 and D2 respectively (refer to FIGS. 5(A) and 5(B)). Then, in step S108, the CPU 30 switches the vehicle 12 from autonomous driving to manual driving and ends the process.

[0119] On the other hand, in step S104, when it is judged that the steering wheel 16 is not being held (step S104: No), the CPU 30 proceeds to the process of step S110. Moreover, the CPU 30 causes the MET 24 and the HUD 26 to display the icons D3 and D4 respectively (refer to FIGS. 6(A) and 6(B)).

[0120] Next, in step S112, the CPU 30 judges whether the steering wheel 16 is being held. When it is judged that the steering wheel 16 is being held (step S112: Yes), the CPU 30 proceeds to the process of step S108.

[0121] On the other hand, in step S112, when it is judged that the steering wheel 16 is not being held (step S112: No), the CPU 30 proceeds to the process of step S114. Moreover, the CPU 30 causes the vehicle 12 to automatically stop and ends the process. Among them, when the vehicle 12 is caused to automatically stop, after the vehicle 12 is moved to a position such as the roadside where the vehicle 12 does not become an obstacle to other vehicles, the vehicle 12 automatically stops.

[0122] As described above, in the present embodiment, since in the vehicle 12 (refer toFigure 1 ) Before switching from autonomous driving to manual driving, in response to an occupant's request to take actual control, it is set such that MET24 and HUD26 respectively display the icons D1 and D2 shown in FIGS. 5(A) and 5(B), and the icons D3 and D4 shown in FIGS. 6(A) and 6(B) in stages.

[0123] Next, the display processing before an event occurs in the vehicle 12 will be described.

[0124] As Figure 13 shown, in step S200, the CPU 30 determines whether the vehicle 12 (refer to Figure 1 ) is in autonomous driving. If it is determined that the vehicle 12 is in autonomous driving (step S200: YES), the CPU 30 proceeds to the processing in step S202. On the other hand, if it is determined that the vehicle 12 is not in autonomous driving (step S200: NO), the CPU 30 ends the display processing. That is, as shown in FIGS. 4(A) and 4(B), the vehicle 12 maintains the display during normal driving.

[0125] Next, in step S202, the CPU 30 determines whether an event has occurred in the vehicle 12. If it is determined that an event has occurred in the vehicle 12 (step S202: YES), the CPU 30 proceeds to the processing in step S204. Here, in step S202, this processing is performed by the CPU 30 until it is determined that an event has occurred in the vehicle 12.

[0126] In step S204, the CPU 30 determines whether the occupant is holding the steering wheel 16 (refer to Figure 1 ). If it is determined that the occupant is holding the steering wheel 16 (step S204: YES), the CPU 30 proceeds to the processing in step S206.

[0127] Next, in step S206, the CPU 30 causes MET24 and HUD26 to respectively display the icon D8 (refer to Figure 11 ). Moreover, if an event occurs in the vehicle 12 in step S208, the CPU 30 ends the process.

[0128] On the other hand, in step S204, when it is determined that the occupant is not holding the steering wheel 16 (step S204: NO), the CPU 30 proceeds to the processing in step S210. Moreover, the CPU 30 causes MET24 and HUD26 to respectively display the icons D5 and D6 (refer to Figure 8 、 Figure 9 ).

[0129] Next, in step S212, the CPU 30 determines whether the occupant is holding the steering wheel 16. When it is determined that the occupant is holding the steering wheel 16 (step S212: Yes), the CPU 30 proceeds to the process of step S214.

[0130] In step S214, the CPU 30 causes the MET 24 and the HUD 26 to display the icon D7 (refer to Figure 10 ). Then, the process proceeds to step 206. On the other hand, when the CPU 30 determines in step S212 that the occupant is not holding the steering wheel 16 (step S212: No), the CPU 30 executes this process until it is determined that the occupant is holding the steering wheel 16.

[0131] As described above, in the present embodiment, since the occupant is requested to perform an operation before an event of the vehicle 12 (refer to Figure 1 ) occurs, the MET 24 and the HUD 26 are set to display the Figures 8 - 10 icons D5 to D7 shown.

[0132] Here, in the present embodiment, the icons D3 and D4 shown in FIGS. 6(A) and 6(B) are highlighted as compared with the icons D1 and D2 shown in FIGS. 5(A) and 5(B). From this, it can be seen that at least one of the distance and the time until the vehicle 12 switches from autonomous driving to manual driving is equal to or less than a specified value (threshold), and the urgency of holding the steering wheel is high. Thus, the occupant can be urged to perform the operation promptly.

[0133] In this way, if at least one of the distance and the time until the vehicle 12 switches from autonomous driving to manual driving is shorter than the specified value (threshold), the necessity of the operation request becomes higher than in the case where at least one of the distance and the time is longer than a preset threshold.

[0134] Therefore, in the present embodiment, the MET 24 and the HUD 26 respectively emphasize the display of the icons D3 and D4 (the fourth guidance image) in the case where at least one of the distance and the time until the switch from autonomous driving to manual driving is shorter than the preset threshold, as compared with the icons D1 and D2 (the fifth guidance image) in the case where at least one of the distance and the time is longer than the preset threshold. That is, in the present invention, the icons D3 and D4 can be made more conspicuous than the icons D1 and D2 to further urge the occupant to pay attention to the reminder.

[0135] In addition, the relationship between the distance and the time until the vehicle 12 switches from autonomous driving to manual driving and the icons has been described here, but the relationship between the distance and the time until an event of the vehicle 12 occurs and the icons is also substantially the same.

[0136] Here, when the vehicle 12 is to be switched from autonomous driving to manual driving, if the occupant does not perform an actual operation, the vehicle 12 cannot be switched to manual driving. Therefore, in this case, the vehicle 12 is forced to stop. On the other hand, when a request for continued actual operation is made to the occupant during the continuation of the autonomous driving of the vehicle 12, there is no situation where the vehicle 12 is forced to stop due to the occupant not performing an actual operation.

[0137] Therefore, in the present embodiment, when a request for actual operation is made to the occupant before the vehicle 12 is switched from autonomous driving to manual driving and when a request for continued actual operation is made to the occupant during the continuation of the autonomous driving, the necessity of the actual operation request is higher in the former case than in the latter case.

[0138] Therefore, in the present embodiment, the MET 24 and the HUD 26 are made to emphasize the display of the icons D1 to D4 (refer to (A) of FIG. 5, (B) of FIG. 5, (A) of FIG. 6, and (B) of FIG. 6) in the case where a request for actual operation is made to the occupant before the vehicle 12 is switched from autonomous driving to manual driving compared to the icon D8 (refer to Figure 11 ) in the case where a request for continued actual operation is made to the occupant during the continuation of the autonomous driving.

[0139] Thus, in the present embodiment, the icons D1 to D4 are made more prominent than the icon D8. In other words, in the present embodiment, since the icon D8 is not as prominent as the icons D1 to D4, the annoyance felt by the occupant can be reduced in the case where a request for continued actual operation is made to the occupant during the continuation of the autonomous driving.

[0140] Moreover, in the present embodiment, for the display control unit 62, when a request for actual operation is made to the occupant before an event occurs in the vehicle 12 during the continuation of the autonomous driving of the vehicle 12 and when a request for continued actual operation is made to the occupant during the continuation of the autonomous driving, the necessity of the actual operation request is higher in the former case than in the latter case.

[0141] Therefore, in the present embodiment, the MET 24 and the HUD 26 are made to emphasize (make prominent) the display of the icons D5 and D6 (refer to Figure 8 ) and the icon D7 (refer to Figure 10 ) in the case where a request for actual operation is made to the occupant before an event occurs in the vehicle during the continuation of the autonomous driving compared to the icon D8 (refer to Figure 11 ) in the case where a request for continued actual operation is made to the occupant during the continuation of the autonomous driving.

[0142] That is, in the present embodiment, the icons D5 to D7 are made more prominent than the icon D8. In other words, in the present embodiment, since the icon D8 is not as prominent as the icons D5 to D7, the annoyance felt by the occupant can be reduced in the case where a request for continued actual operation is made to the occupant during the continuation of the autonomous driving.

[0143] In addition, as described above, when the vehicle 12 is to be switched from autonomous driving to manual driving, if the occupant does not perform an actual operation, the vehicle 12 cannot be switched to manual driving. Therefore, in this case, the vehicle 12 is forced to stop. On the other hand, before an event occurs during the continuation of autonomous driving, the occupant is requested to perform an actual operation. However, in this case, the possibility of forcibly stopping the vehicle 12 due to non-performance of the actual operation is very low.

[0144] That is, when the occupant is requested to perform an actual operation before the vehicle 12 is switched from autonomous driving to manual driving and when the occupant is requested to perform an actual operation before an event occurs during the continuation of autonomous driving of the vehicle 12, the necessity of the actual operation request is higher in the former case than in the latter case.

[0145] Therefore, in the present embodiment, the MET 24 and the HUD 26 emphasize the display of the icons D1 to D4 in the case where the occupant is requested to perform an actual operation before the vehicle 12 is switched from autonomous driving to manual driving compared to the case where the occupant is requested to perform an actual operation before an event occurs during the continuation of autonomous driving of the vehicle 12. That is, in the present embodiment, the icons D1 to D4 are made more conspicuous than the icons D5 to D7.

[0146] That is, in the present embodiment, by changing the icons according to the degree of necessity of the actual operation, it is possible to achieve a balance between making the icons conspicuous in a scenario where the necessity of the actual operation request is high and reducing the complexity of the icons in a scenario where the necessity of the actual operation request is low.

[0147] As described above, the vehicle display control device according to the embodiment has been described. However, it can be implemented in various ways without departing from the gist of the present invention. For example, in the above embodiment, the MET 24 is provided in front of the driver's seat on the instrument panel 14, and the HUD 26 is the projection surface projected by the head-up display device 44. However, it is not limited thereto. That is, the display unit may also be a center display provided at the center in the vehicle width direction of the instrument panel 14.

[0148] In addition, the display processing read and executed by the CPU 30 in the above-described embodiment may also be executed by various processors other than the CPU 30. Examples of the processor in this case include PLDs (Programmable Logic Devices) such as FPGAs (Field-Programmable Gate Arrays) whose circuit structures can be changed after manufacturing, and processors with dedicated circuit structures designed for specific processing, such as ASICs (Application Specific Integrated Circuits), that is, dedicated circuits. In addition, the display processing may be executed by one of these various processors, or may be executed by a combination of two or more processors of the same type or different types (for example, a combination of multiple FPGAs, and a combination of a CPU and an FPGA). In addition, the hardware configuration of these various processors is more specifically a circuit combining circuit elements such as semiconductor elements.

[0149] Moreover, in the above-described embodiment, the memory 36 is configured to store various data, but it is not limited thereto. For example, recording media such as CDs (Compact Disks), DVDs (Digital Versatile Disks), and USB (Universal Serial Bus) memories may also be used as the storage unit. In this case, the vehicle display control program and data are stored in these recording media.

Claims

1. A display control device for a vehicle, wherein a display control unit is provided. When it is necessary for an occupant to hold the steering wheel, the display control unit causes a display unit provided inside the vehicle compartment to display a guidance image for requesting the occupant to hold the steering wheel. When, during the continuation of the vehicle's autonomous driving, before switching from autonomous driving to manual driving by an autonomous driving control unit, a request is made for the occupant to hold the steering wheel, the display control unit causes the display unit to emphasize the display of the guidance image compared to the case where the request for the occupant to hold the steering wheel continues.

2. A display control device for a vehicle, wherein a display control unit is provided. When it is necessary for an occupant to hold the steering wheel, the display control unit causes a display unit provided inside the vehicle compartment to display a guidance image for requesting the occupant to hold the steering wheel. When, during the continuation of the vehicle's autonomous driving, before an event of the vehicle occurs, a request is made for the occupant to hold the steering wheel, the display control unit causes the display unit to emphasize the display of the guidance image compared to the case where the request for the occupant to hold the steering wheel continues.

3. The display control device for a vehicle according to claim 1, wherein when, during the continuation of the vehicle's autonomous driving, before an event of the vehicle occurs, a request is made for the occupant to hold the steering wheel, the display control unit causes the display unit to emphasize the display of the guidance image compared to the case where the request for the occupant to hold the steering wheel continues.

4. The display control device for a vehicle according to claim 3, wherein when, during the continuation of the vehicle's autonomous driving, before switching from autonomous driving to manual driving, a request is made for the occupant to hold the steering wheel, the display control unit causes the display unit to emphasize the display of the guidance image compared to the case where a request for the occupant to hold the steering wheel is made before the event of the vehicle occurs.

5. The display control device for a vehicle according to any one of claims 1, 3, and 4, wherein the display control unit calculates at least one of the distance and time until switching from autonomous driving to manual driving. When at least one of the distance and time is shorter than a preset threshold, the display control unit causes the display unit to emphasize the display of the guidance image compared to the case where at least one of the distance and time is longer than the threshold.

6. The display control device for a vehicle according to claim 2, wherein the display control unit calculates at least one of the distance and time until the event of the vehicle occurs. When at least one of the distance and time is shorter than a preset threshold, the display control unit causes the display unit to emphasize the display of the guidance image compared to the case where at least one of the distance and time is longer than the threshold.

7. The display control device for a vehicle according to any one of claims 1 to 4 and 6, wherein when a request is made for the occupant to hold the steering wheel, compared to the case where a request for the occupant to hold the steering wheel continues, the guidance image is emphasized by increasing the size of the guidance image, increasing the brightness of the guidance image, or displaying the guidance image at a prominent position.

8. A display system for a vehicle, wherein, It has: The display control device for a vehicle according to claim 1; and A display unit, provided inside the vehicle compartment, and displaying a guidance image for requesting the occupant to hold the steering wheel.

9. A display system for a vehicle, wherein, Comprising: The display control device for a vehicle according to claim 2; and A display unit, provided inside the vehicle compartment, and displaying a guidance image for requesting the occupant to hold the steering wheel.

10. A display control method for a vehicle, wherein A process including the following is executed by a computer: During the continuation of the vehicle's autonomous driving, the guidance image in the case of requesting the occupant to hold the steering wheel before switching from autonomous driving to manual driving by the autonomous driving control unit is emphasized more than the guidance image in the case of the continuation of the request for the occupant to hold the steering wheel.

11. A display control method for a vehicle, wherein A process including the following is executed by a computer: During the continuation of the vehicle's autonomous driving, the guidance image in the case of requesting the occupant to hold the steering wheel before the occurrence of an event of the vehicle is emphasized more than the guidance image in the case of the continuation of the request for the occupant to hold the steering wheel.

12. A display control program product for a vehicle, wherein It is used to make a computer execute a process including the following: During the continuation of the vehicle's autonomous driving, the guidance image in the case of requesting the occupant to hold the steering wheel before switching from autonomous driving to manual driving by the autonomous driving control unit is emphasized more than the guidance image in the case of the continuation of the request for the occupant to hold the steering wheel.

13. A display control program product for a vehicle, wherein It is used to make a computer execute a process including the following: During the continuation of the vehicle's autonomous driving, the guidance image in the case of requesting the occupant to hold the steering wheel before the occurrence of an event of the vehicle is emphasized more than the guidance image in the case of the continuation of the request for the occupant to hold the steering wheel.

Images