Information presentation method and information presentation device

Abstract

In the present invention, when presenting, to a user of a vehicle, driving advice information including matter-of-interest information pertaining to matters related to driving that are of interest to the user, the proportion of the matter-of-interest information in the driving advice information is set higher as the driving skill of the user increases.

Description

Information presentation method and information presentation device

[0001] The present invention relates to an information presentation method and an information presentation device.

[0002] An information presentation device is known that determines a driver's driving skill level based on at least one of the driver's driving period information and the driver's driving distance information, and presents information to improve the driving skill according to the driving skill level (Patent Document 1).

[0003] JP 2016-189167 A

[0004] The above-mentioned conventional technology has a problem in that only information that improves driving skills is presented.

[0005] An object of the present invention is to provide an information presentation method and an information presentation device that can present different information to a user of a vehicle depending on the driving skill of the user.

[0006] The present invention solves the above problem by, when presenting a vehicle user with driving advice information that includes information on topics of interest related to the user's driving, setting the proportion of information on topics of interest in the driving advice information to be higher the higher the user's driving skill.

[0007] According to the present invention, different information can be presented to a user of a vehicle depending on the driving skill of the user.

[0008] It is a block diagram showing an example of an embodiment of a driving assistance system including an information presentation device according to the present invention. It is a flowchart (part 1) showing an example of a processing procedure in the driving assistance system of Figure 1. It is a flowchart (part 2) showing an example of a processing procedure in the driving assistance system of Figure 1.

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] [Configuration of Driving Assistance System] Fig. 1 is a block diagram showing an example of an embodiment of a driving assistance system including an information presentation device according to the present invention. The driving assistance system presents driving-related information to vehicle users, including the driver (hereinafter simply referred to as users). The user is not particularly limited to anyone who uses a vehicle, and includes not only vehicle occupants but also users of services provided via the vehicle. The user does not necessarily need to use one (or a specific) vehicle, but can use multiple (or unspecified) vehicles, such as a rental car service.

[0011] The driving assistance system also generates a driving route from the current position to a destination set by the user through autonomous driving control, and controls the vehicle's actuators to drive the vehicle along the driving route. Autonomous driving control is the autonomous control of the vehicle's driving operations, and driving operations include all driving operations such as acceleration, deceleration, starting, stopping, and steering.

[0012] 1, the driving assistance system 10 includes an imaging device 11, an on-board sensor 12, a microphone 13, an actuator 14, a display device 15, a speaker 16, and a driving assistance device 17. These devices are mounted on a vehicle and are communicably connected via an on-board LAN such as a CAN (Controller Area Network), thereby enabling the devices to exchange information with each other. Note that the vehicle is not particularly limited as long as it can accommodate the driving assistance system 10.

[0013] The imaging device 11 is a camera equipped with an imaging element such as a CCD, and captures an image of an object to generate an image including the object. The imaging device 11 may be an infrared camera, a stereo camera, or the like. The imaging device 11 includes an interior camera that captures an image of an object inside the vehicle, and an exterior camera that captures an image of an object around the vehicle. The interior camera is installed on the top of the windshield, rearview mirror, roof, or top of the rear window, etc., and the exterior camera is installed on the front grille, side mirrors, rear bumper, etc. of the vehicle.

[0014] The objects captured by the imaging device 11 include objects inside the vehicle (e.g., vehicle occupants, instrument panel, switches, steering wheel, etc.) and objects on the road on which the vehicle is traveling and its surroundings (e.g., automobiles, bicycles, pedestrians, lane boundaries, center lines, road markings, median strips, curbs, road signs, etc.) A plurality of imaging devices 11 are provided in one vehicle to prevent the occurrence of blind spots where objects cannot be captured.

[0015] The driving assistance system 10 may include a distance measuring device (not shown). Examples of distance measuring devices include laser radar, millimeter-wave radar, and a LiDAR (Light Detection and Ranging) unit. The driving assistance device 17 may acquire image information from the imaging device 11 and also acquire position information of objects from a distance measuring device (not shown), and recognize objects around the vehicle and the driving environment. The driving assistance device 17 acquires information at predetermined time intervals (for example, every 0.1 to 1 millisecond).

[0016] The on-board sensors 12 detect the vehicle's driving state. The on-board sensors 12 include a vehicle speed sensor, an acceleration sensor, a yaw rate sensor, a steering angle sensor, and the like. Any known sensor can be used without any particular limitations, and the arrangement and number of sensors can be set appropriately within a range that allows appropriate detection of the vehicle's driving state. The on-board sensors 12 may also include a positioning system that detects the current position of the vehicle. The positioning system calculates the current position of the vehicle based on radio waves received from GPS (Global Positioning System) satellites, etc.

[0017] The microphone 13 acquires sounds from within the vehicle cabin as audio data. Examples of sounds from within the vehicle cabin include the voices of the occupants, the sounds output from the speaker 16, and the sounds of the vehicle traveling. The microphone 13 may be a stand microphone, a close-talking microphone, a gun microphone, or the like, and is installed in an appropriate position within a range where it can appropriately detect sounds from within the vehicle cabin.

[0018] The actuator 14 converts the electrical control signal input from the driving assistance device 17 into mechanical work. The actuator 14 includes a servo motor, a hydraulic motor, a hydraulic cylinder, etc., and these devices operate the drive device and steering device of the vehicle.

[0019] The display device 15 displays to the user information output from the driving assistance device 17. Examples of the display device 15 include a projector such as a head-up display, a liquid crystal display provided on an instrument panel, etc. The display device 15 may be integrated with an input device (not shown).

[0020] The speaker 16 converts electrical signal energy into acoustic energy and emits it into space. The speaker 16 may be, but is not limited to, an integrated or separate vehicle speaker. The speaker 16 is provided at an appropriate position within a range where the user can adequately hear the output sound. The speaker 16 may be integrated with the display device 15.

[0021] The driving assistance device 17 controls the devices that make up the driving assistance system 10 to cooperate with each other and perform driving assistance for the vehicle. The driving assistance device 17 autonomously controls the driving behavior of the vehicle within a predetermined range using devices mounted on the vehicle. Driving behavior that is not controlled by the driving assistance device 17 is manually operated by the driver. When the driver drives the vehicle manually, the driving assistance device 17 does not autonomously control the driving behavior, and the driving behavior of the vehicle is controlled by the driver's operation.

[0022] The driving assistance device 17 is, for example, a computer, and includes a CPU (Central Processing Unit) which is a processor, a ROM (Read Only Memory) in which a program is stored, and a RAM (Random Access Memory) which functions as an accessible storage device. The CPU is an operating circuit for executing the program stored in the ROM and realizing the functions of the driving assistance device 17. Note that an MPU (Micro Processing Unit), ASIC (Application Specific Integrated Circuit), or the like may be used instead of or together with the CPU.

[0023] The driving assistance device 17 includes a storage unit 18, which is a storage medium (e.g., a non-volatile memory such as a flash memory) that stores information necessary for driving assistance processing. The driving assistance device 17 and the storage unit 18 are communicably connected via an in-vehicle LAN or the like. Note that instead of an in-vehicle storage medium, the storage unit 18 may be a server that is provided outside the vehicle (e.g., in a remote location away from the vehicle) and communicably connected to the driving assistance device 17 via a network.

[0024] The driving assistance device 17 includes, as a part thereof, an information presentation device 20. The information presentation device 20 presents information about driving to the user in at least one of the following cases: when the vehicle is being driven manually by the driver, and when some driving operations are being autonomously controlled by the driving assistance device 17. Presenting information includes displaying images and text, outputting (playing) audio data, turning on switches and lights, and the like.

[0025] The driving assistance device 17 has a driving assistance function that performs driving assistance for the vehicle, and the information presentation device 20 has an information presentation function that presents information related to driving to the user as part of the driving assistance function. The ROM stores a program for realizing the driving assistance function, and the CPU executes the program stored in the ROM to realize the driving assistance function including the information presentation function.

[0026] 1 illustrates, for convenience, a driving control unit 19, an estimation unit 21, and a presentation unit 22 as functional blocks that realize the driving assistance function. The estimation unit 21 and the presentation unit 22 are functional blocks that realize the information presentation function and are included in the information presentation device 20.

[0027] The driving control unit 19 generates a driving route for the vehicle and operates the actuator 14 so that the vehicle drives along the driving route. The driving control unit 19 generates a control signal for operating the actuator 14 and outputs the control signal to the actuator 14. The driving control unit 19 also determines whether the vehicle is being driven manually, and if it determines that the vehicle is being driven manually, outputs an execution instruction to the information presentation device 20 to present information about driving. Alternatively or in addition to this, the driving control unit 19 determines whether some driving operations of the vehicle are being autonomously controlled by the driving assistance device 17, and if it determines that some driving operations of the vehicle are being autonomously controlled by the driving assistance device 17, outputs an execution instruction to the information presentation device 20 to present information about driving.

[0028] [Functions of the Information Presentation Device] When an execution instruction is input from the driving control unit 19 to the information presentation device 20, the estimation unit 21 estimates the user's driving skill (hereinafter also simply referred to as driving skill) from the user's driving history information (hereinafter also simply referred to as driving history information). The driving history information is information about the user's past driving operations, and is acquired by the in-vehicle sensors 12, such as a vehicle speed sensor and a steering angle sensor. The user's driving operations include the user's driving operations during manual driving and the user's driving operations when some driving operations are autonomously controlled by the driving assistance device 17. The driving history information is stored in the memory unit 18 in association with the user (or the user and the vehicle).

[0029] The driving history information may include vehicle location information when the user performed driving operations, information about the driving state when the user performed driving operations, information about the driving environment of the vehicle when the user performed driving operations, etc. The driving history information may also include information about the user's own characteristics, audio data of conversations between occupants (including the user) acquired by microphone 13 when the user performed driving operations, image information about the interior of the vehicle captured by an in-vehicle camera when the user performed driving operations, etc.

[0030] Driving skill is the ability to drive a vehicle and is an index that indicates the skill of the user's driving operation. For example, if the estimation unit 21 detects from the driving history information that the user is relatively likely to stop at a lane merging point just before entering the main lane, the estimation unit 21 estimates that the user is not good at driving to enter the main lane and has relatively low driving skill. On the other hand, if the estimation unit 21 detects from the driving history information that the user relatively frequently drives on ring roads (circuits) built for automobile racing, the estimation unit 21 estimates that the user is interested in sports driving and has relatively high driving skill.

[0031] Furthermore, the estimation unit 21 estimates the user's driving interests (hereinafter also simply referred to as interests) from the driving history information. For example, the estimation unit 21 extracts, from the driving history information, places the user regularly visits, characteristics of the user's passengers, driving actions the user repeatedly performs, and the user's speech content, and estimates the user's driving interests from the extracted elements. As an example, if the driving history information extracts that the user's passengers are children as a characteristic of the user's passengers, the estimation unit 21 estimates that the user's interests lie in facilities where children can rest between the current location and the destination.

[0032] The concerns may include at least one of the degree of environmental impact caused by the user's driving, the degree to which the occupants are less likely to get carsick, the degree to which the vehicle is less likely to be damaged, and the degree to which the user's driving affects other surrounding vehicles. The degree of environmental impact caused by the user's driving refers, for example, to the fuel efficiency and tire wear of the vehicle when the user drives the vehicle, and corresponds to the extent to which so-called eco-driving is performed. The degree to which the occupants are less likely to get carsick corresponds, for example, to the degree to which the vehicle's behavior changes little. The degree to which the vehicle is less likely to be damaged corresponds, for example, to the degree to which the vehicle's tires and gears are less likely to wear. The degree to which the user's driving affects other surrounding vehicles corresponds, for example, to the magnitude of changes in the behavior of the other surrounding vehicles due to changes in the vehicle's behavior.

[0033] The estimation unit 21 may estimate the user's interests based on at least one of the driving history information, information on how often the user gives other passengers a ride in the vehicle, and information on the user's conversation. The estimation unit 21 extracts the user's speech content from the user's voice data acquired from the microphone 13, and acquires information on the user's conversation from the extracted speech content. For example, when the user gives other passengers a ride in the vehicle relatively frequently and the presence of a passenger who is in poor health is detected from the user's speech content, the estimation unit 21 estimates that the user's interest is the passenger's susceptibility to car sickness.

[0034] The estimation unit 21 may estimate, from the driving history information, driving tasks (hereinafter simply referred to as driving tasks) for the user to drive the vehicle safely. For example, the estimation unit 21 extracts, from the driving history information, driving scenes in which an avoidance action was taken to avoid contact with an obstacle, driving scenes in which the vehicle's behavior changed significantly due to deceleration or steering, and driving scenes in which the vehicle stopped at a position where stopping is not necessary, and identifies, from the extracted driving scenes, driving scenes in which the user is unable to drive the vehicle smoothly (i.e., driving scenes in which the user is not good at driving). Then, the estimation unit 21 sets, as the driving task, a target behavior (or target driving action) for the user to drive the vehicle smoothly (or avoid contact with an object) in driving scenes in which the user is not good at driving.

[0035] For example, if multiple driving scenes in which the vehicle changes lanes into adjacent lanes are extracted from the driving history information as driving scenes in which the vehicle's behavior changes significantly, the estimation unit 21 identifies driving scenes in which the vehicle changes lanes into adjacent lanes as driving scenes in which the user is not good at. The estimation unit 21 sets a target behavior of paying attention to following vehicles in the adjacent lane so that the vehicle can smoothly enter the adjacent lane. Note that an obstacle refers to an object that may affect the vehicle's driving, such as another automobile (other vehicle), bicycle, or pedestrian.

[0036] The estimation unit 21 may estimate a driving task based on at least one of the driving history information, current accident information around the vehicle (hereinafter also simply referred to as accident information), and information on failure cases corresponding to driving skills (hereinafter also simply referred to as failure cases). The estimation unit 21, for example, acquires accident information from a server communicably connected via a network, and acquires information on failure cases from the storage unit 18.

[0037] As one example, if the estimation unit 21 determines from the driving history information that the user is not good at entering the main lane at a merging point, and acquires accident information that an accident has occurred near the merging point ahead of the vehicle, the estimation unit 21 sets a target behavior of driving slowly when entering the main lane at the merging point.As another example, if the estimation unit 21 determines from the driving history information that the user has low driving skill and is not good at changing lanes to an adjacent lane, and acquires information that the user often comes into contact with obstacles when changing lanes, which is a failure example corresponding to low driving skill, the estimation unit 21 sets a target driving behavior of refraining from changing lanes when another vehicle traveling in an adjacent lane is detected.

[0038] The presentation unit 22 presents to the user driving advice information (hereinafter simply referred to as driving advice information) regarding advice on driving operations to the user. The driving advice information may include interest information regarding a subject of interest. Alternatively, the driving advice information may include at least one of driving challenge information regarding a driving challenge and interest information regarding a subject of interest.

[0039] For example, the presentation unit 22 acquires current position information of the vehicle from a positioning system, recognizes the driving environment around the vehicle from the imaging device 11 and a ranging device (not shown), detects the driving state of the vehicle from the on-board sensor 12, and acquires map information from a database (not shown). Then, based on at least one of the current position information of the vehicle, the driving environment information of the vehicle, the driving state of the vehicle, and the map information, the presentation unit 22 presents driving advice information to the user at a timing appropriate for the content of the driving advice information. For example, when it is determined that the vehicle is approaching a position where a target behavior set as a driving task will be performed, the presentation unit 22 presents driving advice information to the user.

[0040] As an example, if the estimation unit 21 sets a target driving action of merging onto the main line without stopping at the merging point as the driving task and estimates that the concern is the degree of car sickness of a child in the vehicle, the presentation unit 22 outputs, as driving advice information, a voice saying, "Try to merge onto the main line without stopping at the merging point. Your child will be less likely to get car sick" from the speaker 16 when the vehicle approaches the merging point. Of the voice output from the speaker 16, the part "Try to merge onto the main line without stopping at the merging point" corresponds to the driving task information, and the part "Your child will be less likely to get car sick" corresponds to the concern information.

[0041] When presenting the driving advice information including the matter of interest information related to the subject of interest to the user, the presentation unit 22 sets a higher proportion of the matter of interest information in the driving advice information as the driving skill becomes higher. That is, when presenting the driving advice information including the matter of interest information related to the subject of interest to the user, the presentation unit 22 sets a higher proportion of the matter of interest information in the driving advice information as the driving skill becomes higher when the driving skill becomes high than when the driving skill becomes low.

[0042] As an example, if the estimation unit 21 sets a target driving operation that reduces the amount of change in the roll angle of the vehicle body while driving around a curve, and it is estimated that the subject of interest is sporty driving on a circuit and that the driving skill is relatively high, the presentation unit 22 displays, on the display device 15, a message such as "You took the curve smoothly" as driving advice information after the vehicle has passed through the curve. This driving challenge information corresponds to the subject of interest information and does not include the driving challenge information.

[0043] The presentation unit 22 may quantify the driving skill based on the detection results of the on-board sensors 12. For example, the presentation unit 22 detects the number of times the vehicle acceleration and lateral acceleration exceed a predetermined value from the detection results of the acceleration sensor, and scores the driving skill according to the number of times detected. The predetermined value can be set as appropriate within a range that allows the driving skill to be appropriately scored.

[0044] When presenting the driving advice information including at least one of driving problem information related to a driving problem and interest information related to a subject of interest to the user, the presentation unit 22 may present the driving advice information including only the driving problem information to the user if the driving skill is less than a first threshold. That is, the presentation unit 22 may present only the driving problem information to the user if the driving skill is less than the first threshold. The first threshold can be set to an appropriate value within a range that can determine whether the user is a beginner driver who is not yet accustomed to driving operations.

[0045] When presenting the driving advice information including at least one of driving challenge information and subject-of-interest information to the user, the presentation unit 22 may present the driving advice information including only the subject-of-interest information to the user when the driving skill is equal to or greater than a second threshold that is higher than the first threshold. That is, the presentation unit 22 may present only the subject-of-interest information to the user when the driving skill is equal to or greater than the second threshold. The second threshold can be set to an appropriate value within a range that can determine whether the user is an advanced driver who is skilled in driving operations.

[0046] When the user's driving skill is equal to or greater than a first threshold and less than a second threshold, the presentation unit 22 may estimate the user's interests and present to the user driving advice information including interest information related to the estimated interests. That is, when the user's driving skill is determined to be that of an intermediate driver who is accustomed to driving but not skilled, the presentation unit 22 may estimate the user's interests and present (or introduce) the estimated interests to the user. Furthermore, when it is detected from the voice data acquired from the microphone 13 that the user is interested in the presented (or introduced) interests, the presentation unit 22 may associate the presented (or introduced) interests with the user and register them in the storage unit 18.

[0047] The driving advice information may include information for praising the user (hereinafter also referred to as first information) and information for calling the user's attention (hereinafter also referred to as second information). Similarly, the driving challenge information and the interest information may include first information and second information. The presentation unit 22 may present the first information or the second information according to each of the following timings: before the user starts driving (hereinafter also referred to as first timing), while the user is performing driving operations (hereinafter also referred to as second timing), and when the user finishes driving (hereinafter also referred to as third timing). Furthermore, if the user performs a dangerous driving operation, information warning the user not to perform the dangerous driving operation may be presented.

[0048] The first information presented at the first timing is, for example, information about a good driving operation during the previous drive, and the second information presented at the first timing is, for example, information about a poor driving operation during the previous drive. The first information presented at the second timing is, for example, information that gives a good evaluation to the driving operation performed, and the second information presented at the second timing is, for example, information about points to note in the surrounding driving environment. The first information presented at the third timing is, for example, information about the best driving operation from the start to the end of driving, and the second information presented at the third timing is, for example, information about a poor driving operation from the start to the end of driving.

[0049] [Processing in Driving Assistance System] The information presentation processing of this embodiment will be described with reference to Figures 2A and 2B. Figures 2A and 2B are flowcharts showing an example of a processing procedure executed in the driving assistance system 10. The processing described below is executed at predetermined time intervals (for example, every 0.1 to 1 millisecond) by a processor (CPU) included in the driving assistance device 17 (information presentation device 20) when the vehicle is being manually driven by the user and when some driving operations are being autonomously controlled by the driving assistance device 17.

[0050] 2A, the information presentation device 20 acquires information about the user, such as the user's driving history information, from the storage unit 18, and then acquires vehicle driving state information from the on-board sensor 12 in step S12. In step S13, the information presentation device 20 estimates the user's driving skill based on the user's driving history information, and then determines in step S14 whether the driving skill is equal to or greater than a first threshold value.

[0051] If it is determined that the driving skill is less than the first threshold (i.e., the user is a beginner driver with relatively low driving skill), the process proceeds to step S15. In step S15, the information presentation device 20 estimates the user's driving problems from the user's driving history information, and in the subsequent step S16, presents the user with driving advice information consisting only of the estimated driving problems. On the other hand, if it is determined that the driving skill is equal to or greater than the first threshold, the process proceeds to step S21 in FIG. 2B.

[0052] 2B , the information presentation device 20 determines whether the driving skill is equal to or greater than a second threshold. If it is determined that the driving skill is less than the second threshold (i.e., if the user is an intermediate driver with standard driving skill), the process proceeds to step S22. In step S22, the information presentation device 20 estimates the user's interests based on information about the user's conversation acquired from the storage unit 18, and then in step S23, the information presentation device 20 suggests the estimated interests to the user by presenting driving advice information including the interest information to the user.

[0053] On the other hand, if it is determined that the driving skill is equal to or greater than the second threshold (i.e., if the user is an advanced driver with relatively high driving skill), the process proceeds to step S24. In step S24, the information presentation device 20 estimates the user's interests based on the user's driving history information acquired from the storage unit 18, and in the subsequent step S25, presents the user with driving advice information including the interest information.

[0054] According to the present embodiment, there is provided an information presentation method executed by an information presentation device 20 of a vehicle, in which, when presenting to a user of the vehicle, driving advice information including interest information relating to the user's driving interests, the information presentation device sets a higher proportion of the interest information in the driving advice information as the user's driving skill improves. This makes it possible to present different information to the user depending on the driving skill of the user of the vehicle.

[0055] In the information presentation method of this embodiment, the information presentation device 20 estimates the user's interests and driving skill from the user's driving history information, thereby enabling more accurate estimation of the user's driving skill.

[0056] In the information presentation method of this embodiment, the driving advice information includes information for praising the user and information for calling the user's attention, thereby making it possible to present a wider variety of information to the user.

[0057] Furthermore, according to the present embodiment, there is provided an information presentation method executed by an information presentation device 20 of a vehicle, in which, when the information presentation device 20 presents to the user at least one of driving challenge information related to driving challenges for the user of the vehicle to drive the vehicle safely and interest information related to the user's interests in driving, if the driving skill of the user is less than a first threshold, only the driving challenge information is presented to the user. This makes it possible to present different information to the user depending on the driving skill of the user of the vehicle.

[0058] In the information presentation method of the present embodiment, when the driving skill is equal to or greater than a second threshold value that is higher than the first threshold value, the information presentation device 20 presents only the interest information to the user, thereby making it possible to present different information to the user depending on the driving skill of the vehicle user.

[0059] In the information presentation method of the present embodiment, when the driving skill is equal to or greater than the first threshold and less than the second threshold, the information presentation device 20 estimates the subject of interest and presents the estimated subject of interest to the user, thereby making it possible to present different information to the user depending on the driving skill of the vehicle user.

[0060] In the information presentation method of the present embodiment, the information presentation device 20 estimates the driving task, the interest, and the driving skill from the driving history information of the user, thereby enabling more accurate estimation of the driving skill.

[0061] In the information presentation method of this embodiment, the information presentation device 20 estimates the driving task based on at least one of the user's driving history information, current accident information around the vehicle, and information on failure cases corresponding to the driving skill, thereby enabling more accurate estimation of the driving task.

[0062] In the information presentation method of the present embodiment, the driving challenge information and the interest information include information for praising the user and information for calling the user's attention, thereby making it possible to present a wider variety of information to the user.

[0063] In the information presentation method of this embodiment, the concerns include at least one of the level of environmental load caused by the driving of the user, the level of likelihood of the occupants getting carsick, the level of likelihood of damage to the vehicle, and the level of impact the driving of the user has on other vehicles in the vicinity. This makes it easier to estimate the concerns.

[0064] In the information presentation method of this embodiment, the information presentation device estimates the user's subject of interest based on at least one of driving history information of the user, information on the frequency with which the user gives other passengers a ride in the vehicle, and information on conversations between the user, thereby enabling more accurate estimation of the user's subject of interest.

[0065] According to the present embodiment, an information presentation device is provided that includes a presentation unit that, when presenting driving advice information including interest information related to the user's driving interests to the user, sets a higher proportion of the interest information in the driving advice information as the user's driving skill improves. This makes it possible to present different information to the user depending on the driving skill of the vehicle user.

[0066] REFERENCE SIGNS LIST 10 Driving assistance system 11 Imaging device 12 In-vehicle sensor 13 Microphone 14 Actuator 15 Display device 16 Speaker 17 Driving assistance device 18 Memory unit 19 Travel control unit 20 Information presentation device 21 Estimation unit 22 Presentation unit

Claims

1. An information presentation method executed by an information presentation device of a vehicle, wherein when the information presentation device presents driving advice information to a user of the vehicle that includes interest information related to the user's driving concerns, the higher the user's driving skill, the higher the proportion of the interest information in the driving advice information is set.

2. The information presentation method according to claim 1, wherein the information presentation device estimates the user's interests and driving skills from driving history information of the user.

3. The information presentation method according to claim 1 or 2, wherein the driving advice information includes information for praising the user and information for calling the user's attention.

4. An information presentation method executed by an information presentation device of a vehicle, wherein the information presentation device presents to the user at least one of driving challenge information related to driving challenges for the user of the vehicle to drive the vehicle safely and interest information related to the user's concerns about driving, and when the user's driving skill is below a first threshold, the information presentation method presents only the driving challenge information to the user.

5. The information presentation method according to claim 4, wherein the information presentation device presents only the interest information to the user when the driving skill is equal to or greater than a second threshold value that is higher than the first threshold value.

6. The information presentation method according to claim 5, wherein the information presentation device, when the driving skill is equal to or greater than the first threshold and less than the second threshold, estimates the subject of interest and presents the estimated subject of interest to the user.

7. An information presentation method according to any one of claims 4 to 6, wherein the information presentation device estimates the driving challenges, the interests, and the driving skills from the user's driving history information.

8. An information presentation method according to any one of claims 4 to 7, wherein the information presentation device estimates the driving task based on at least one of the user's driving history information, current accident information around the vehicle, and information on failure cases corresponding to the driving skill.

9. An information presentation method described in any one of claims 4 to 8, wherein the driving challenge information and the interest information include information for praising the user and information for calling the user's attention.

10. An information presentation method described in any one of claims 1 to 9, wherein the concerns include at least one of the degree of environmental impact caused by the user's driving, the degree to which occupants are less likely to get carsick, the degree to which the vehicle is less likely to be damaged, and the degree to which the user's driving affects other surrounding vehicles.

11. An information presentation method according to any one of claims 1 to 10, wherein the information presentation device estimates the user's interests based on at least one of the user's driving history information, information regarding the frequency with which the user allows other passengers to ride in the vehicle, and information regarding the user's conversations.

12. An information presentation device that includes a presentation unit that, when presenting driving advice information to a vehicle user that includes interest information related to the user's driving interests, sets a higher proportion of the interest information in the driving advice information the higher the user's driving skill.

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