JP5343666B2 - Information presenting apparatus and information presenting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information presentation device for appropriately presenting information to a driver according to the driving load of a driver. <P>SOLUTION: The information presentation device includes: an estimation means for estimating the driving load of a driver based on the vehicle state and/or road situations of an own vehicle; a presentation configuration determination means for determining the presentation configurations of presentation information including the length of the presentation time of presentation information to be presented to the driver and the start timing of the presentation time of the presentation information to be presented to the driver based on the estimated driving load of the driver; and a presentation means 500 for presenting the presentation information to the driver in presentation configurations determined by the presentation configuration determination means. When the estimated driving load of the driver becomes equal to or more than a prescribed value when presenting the presentation information, the presentation configuration determination means changes the presentation configurations of the presentation information for extending the length of the presentation time to the driver of the presentation information. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an information presentation apparatus and an information presentation method.

  Conventionally, the driver's driving load on the vehicle travel route is predicted in advance, and the timing for presenting information to the driver is determined based on the predicted driving load of the driver and the time taken to present the information. The technique which performs is known (patent document 1).

JP 2008-82940 A

  However, in the prior art, if the driver's driving load suddenly increases due to a lane change or the like, the driver cannot provide enough time to recognize the contents of the presentation information. In some cases, the contents of the presented information could not be recognized.

  The problem to be solved by the present invention is to provide an information presentation device capable of appropriately presenting information to the driver according to the driving load of the driver.

The present invention provides a presentation time for presenting presentation information to the driver when the driver's driving load exceeds a predetermined value when presenting the presentation information to the driver. When presenting the presentation information while extending the length and storing the presentation information when the estimated driving load of the driver is greater than or equal to a predetermined value for a predetermined time or more , the above-mentioned problem To solve.

  According to the present invention, when the driver's driving load becomes a predetermined value or more, the driver can provide the presentation information even if the driver's driving load is high by extending the length of the presentation time. Since the presentation time for recognizing the content of the vehicle can be secured sufficiently, the driver can properly recognize the content of the presentation information.

It is a block diagram which shows the structure of the information presentation system which concerns on 1st Embodiment. It is a flowchart which shows the information presentation process which concerns on 1st Embodiment. It is a figure which shows an example of the estimation method of a driver | operator's driving load. It is a figure which shows an example of the presentation information displayed on the screen of a display, when the classification of presentation information is gasoline remaining amount information. It is a figure which shows an example of the presentation information displayed on the screen of a display when the classification of presentation information is what is called eco-driving advice information. It is a figure explaining the extension method of presentation time Td in case presentation information does not contain operation button information. It is a figure explaining the extension method of presentation time Td in case presentation information contains operation button information. It is a flowchart which shows the information presentation process which concerns on 2nd Embodiment. It is a figure which shows an example of the prediction method of a driver | operator's driving load. It is a figure for demonstrating the delay method of the presentation start timing of presentation information. It is a flowchart which shows the information presentation process which concerns on 3rd Embodiment. It is a figure which shows an example of the information presentation log | history list displayed on the screen of a display.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a vehicle having an information presentation system that presents presentation information to the driver of the vehicle will be described as an example.

  FIG. 1 is a block diagram showing the configuration of the information presentation system. As shown in FIG. 1, the information presentation system of the present embodiment includes an information presentation unit 100, a vehicle controller 200, various sensors 300, a navigation device 400, and an information presentation device 500. Each of these components is connected by a CAN (Controller Area Network) or other in-vehicle LAN, and can exchange information with each other.

  The vehicle controller 200 acquires various vehicle information such as vehicle travel information and operation information by the driver from the various sensors 300. For example, as shown in FIG. 1, the various sensors 300 include a vehicle speed sensor 301 and a steering angle sensor 302. The vehicle controller 200 includes various vehicle information such as the vehicle speed from the vehicle speed sensor 301 and the steering angle from the steering angle sensor 302. To get. The acquired vehicle information is transmitted to the information presentation unit 100.

  The navigation device 400 includes a map database 410 that stores road shape data and the like, a communication device 420 that is connected to a mobile phone or the like and communicates with an external database, and road information acquisition that acquires road information from the map database 410 and the communication device 420. Device 430. Then, the navigation apparatus 400 refers to the map database 410 and acquires road information such as the presence / absence of a road shape that is predicted to have a high driving load on the route that the vehicle is expected to travel, and position information of the road shape. Has the function of Here, examples of the road shape predicted to have a high driving load on the driver include a curve, an intersection, a junction, a branch point, or a roundabout (runabout or roundabout).

  In addition, the navigation device 400 has a function of acquiring weather information on a route that the vehicle is predicted to travel by communicating with an external telematics database via the communication device 420. Furthermore, the navigation apparatus 400 has a GPS (Global Positioning System) module (not shown), and has a function of detecting position information of the host vehicle via the GPS module. In addition, the navigation device 400 has a function of referring to the map database 410 and acquiring a guidance route to the destination.

  The information presentation unit 100 includes a control device 10 that executes information presentation processing for presenting presentation information to the driver according to the driving load of the driver.

  The control device 10 of the present embodiment includes a ROM (Read Only Memory) 12 that stores a program for executing an information presentation process, a CPU (Central Processing Unit) 11 that executes a program stored in the ROM 12, And a RAM (Random Access Memory) 13 that functions as an accessible storage device. As an operation circuit, instead of or in addition to the CPU (Central Processing Unit) 11, an MPU (Micro Processing Unit), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array). Etc. can be used.

  The control device 10 executes a program stored in the ROM 12 by the CPU 11, thereby obtaining a vehicle information acquisition function, a road information acquisition function, a driving load estimation function, a driving load prediction function, an information type selection function, a storage function, and a presentation mode. Implement each function of the decision function. Below, each function with which the control apparatus 10 is provided is demonstrated.

  The vehicle information acquisition function of the control device 10 acquires various types of vehicle information such as vehicle travel information and driver operation information from the vehicle controller 200.

  The road information acquisition function of the control device 10 acquires, as road information, a road situation on a route predicted that the vehicle will travel from the road information acquisition device 430 of the navigation device 400. For example, the road information acquisition function refers to the map database 410 provided in the navigation device 400, and the presence or absence of a road shape that is predicted to have a high driving load on the route that the vehicle is expected to travel, and the position information of the road shape Get road information such as. In addition, the road information acquisition function acquires road information such as weather information on a route where the vehicle is predicted to travel, position information of the host vehicle, and route guidance information.

  The driving load estimation function of the control device 10 estimates the driving load of the driver based on the vehicle information acquired by the vehicle information acquisition function. In the present embodiment, the driving load estimation function estimates the driving load of the driver in three stages of estimated driving load levels of “high”, “medium”, and “low”. A detailed method for estimating the driving load of the driver will be described later.

  The driving load prediction function of the control device 10 predicts the driving load of the driver on the route from the position of the own vehicle to a predetermined point in the route on which the vehicle travels based on the road information acquired by the road information acquisition function. To do. The driving load prediction function predicts the driving load of the driver by dividing it into three predicted driving load levels of “high”, “medium”, and “low”. A detailed method for predicting the driving load of the driver will be described later.

  The information type selection function of the control device 10 is based on the vehicle information acquired by the vehicle information acquisition function and the road information acquired by the road information acquisition function. From the type of presentation information such as advice information or half-door running warning indicating that the vehicle is running in a half-door state, depending on the state of the vehicle and the situation around the vehicle Select the type of presentation information to be presented. For example, when a half-door warning signal is acquired by the vehicle information acquisition function, the presentation information selection function selects a half-door travel warning as a type of presentation information to be presented to the driver. Furthermore, the information type selection function selects the type of presentation information selected by the driver by operating an operation panel (not shown) provided in the navigation device 400 as the type of presentation information to be presented to the driver.

  The storage function of the control device 10 is configured to display the presented presentation information when the driving load of the driver is greater than or equal to a predetermined value while the presentation information is being presented, for a predetermined time Swl or longer. 10 is added to the presentation history list stored in the RAM 13. Further, when adding the presentation information to the presentation history list, the storage function adds to the presentation history list the time when the presentation information is presented and the position information where the presentation information is presented, together with the presentation information. The presentation information added to the presentation history list by the storage function is displayed on the screen of the display 510 by a driver's operation or the like. As a result, the driver can check the presentation information added to the presentation history list.

  Further, the storage function determines whether the presentation information added to the presentation history list is useful information for the driver, and when the presentation information added to the presentation history list is not useful information for the driver, In order for the driver to grasp that the presented information is not useful, the present vehicle information or the current road condition information corresponding to the presented information is added to the presented information added to the presented history list, or This presentation information is deleted from the presentation history list. Thus, the driver can easily grasp the presentation information useful for the driver from the presentation information added to the presentation history list.

  The presentation mode determination function of the control device 10 presents presentation information to the driver based on the driving load of the driver estimated by the driving load estimation function and the type of the presentation information selected by the information type selection function. A presentation mode (presentation method) is determined. In the present embodiment, the presentation mode determination function determines the presentation information by determining the length of the presentation time for presenting the presentation information to the driver and the start timing of the presentation time for presenting the presentation information to the driver. The presentation mode is determined. A detailed method for determining the presentation mode will be described later.

  In addition, although each function mentioned above is implement | achieved by the control apparatus 10 in this embodiment, it is not limited to this, For example, these functions are apparatuses, such as a navigation apparatus 400 and meter control (not shown). You may make it disperse | distribute to.

  The information presentation device 500 presents presentation information to the driver in the presentation mode of presentation information determined by the presentation mode determination function of the control function 10. Examples of the information presentation apparatus 500 include a display 510 and a speaker 520. The display 510 is installed in, for example, the navigation device 400 or a meter panel (not shown), and displays the presentation information as text information on a screen provided in the display 510, thereby recognizing the content of the presentation information to the driver. Can be made. Furthermore, the display 510 can present the presentation history list to the driver by the operation of the driver, and thus the driver can check the presentation information added to the presentation history list. In addition, the speaker 520 is installed in the navigation device 400, for example, and can output the presentation information as a guidance voice to make the driver recognize the content of the presentation information.

  Next, the information presentation process by the control apparatus 10 is demonstrated along the flowchart shown in FIG. FIG. 2 is a flowchart showing the information presentation process according to the first embodiment. This information presentation process is executed by the control device 10 at regular time intervals. In addition, when each function for performing this information presentation process is distributed to devices such as the navigation device 400 and meter control, a program for executing these functions is fixed by the navigation device 400 and the main program of meter control. By calling at time intervals, this information presentation process is executed at regular time intervals.

  In step S101, the information type selection function of the control device 10 determines whether there is a type of presentation information to be presented to the driver. For example, when the driver selects the type of presentation information to be presented to the driver by operating an operation panel (not shown) provided in the navigation device 400, the information type selection function provides the presentation to be presented to the driver. It is determined that there is a type of information, and the process proceeds to step S102. In addition, even when the type of the presentation information is not selected by the driver, the information type selection function is based on the vehicle information acquired by the vehicle information acquisition function and the road information acquired by the road information acquisition function. A type of presentation information to be presented to the driver is selected according to the state of the vehicle and the situation around the vehicle. For example, when a half-door travel warning signal is acquired from the vehicle controller 200 by the vehicle information acquisition function, the information type selection function determines that a half-door travel warning should be presented, and presentation information that should present a half-door travel warning. Select as the type. Thus, even when the type of presentation information to be presented to the driver is selected by the information presentation selection function, it is determined that there is a type of presentation information to be presented to the driver, and the process proceeds to step S102. If the information type selection function determines that there is no type of presentation information to be presented, the information presentation process is terminated. In addition, when there are two or more types of presentation information to be presented to the driver, for example, presentation information of one of the types may be presented based on the priority set in advance for each type of presentation information. Alternatively, two or more types of presentation information may be presented simultaneously.

  Next, in step S102, vehicle information is acquired from the vehicle controller 200 by the vehicle information acquisition function.

  In step S103, road information is acquired from the navigation device 400 by the road information acquisition function. Note that steps S102 and 103 may be performed in parallel, or step S103 may be performed first.

  In step S104, it is determined whether vehicle information has been acquired in step S102 or road information has been acquired in step S103. If these pieces of information are acquired, the process proceeds to step S105. On the other hand, if these pieces of information are not acquired, the process returns to step S101. Alternatively, for example, when the driver selects the presentation of traffic jam information and the vehicle information / road information related to the traffic jam information cannot be acquired, the process proceeds to step S105 in order to present the presentation information such as “there is no traffic jam”. It is good also as an aspect.

  In step S105, the standard presentation time Ts is set as the presentation time Td by the presentation mode determination function. The standard presentation time Ts is a time determined in advance for presenting the presentation information to the driver, and may be a specific time regardless of the type of the presentation information, or a predetermined time determined for each type of the presentation information. Or a time calculated according to the information amount of the presentation information.

  Next, in step S106, presentation information is acquired based on the vehicle information acquired in step S102 and the road information acquired in step S103, and the information presentation device 500 starts presenting the acquired presentation information. Is done. In addition, after starting presentation of presentation information in step S106, presentation information is presented until presentation of presentation information is completed in step S113.

  In step S107, the driving load of the driver is estimated based on the vehicle information acquired in step S102 by the driving load estimation function. In the present embodiment, the driving load estimation function estimates the driving load of the driver in three stages of estimated driving load levels of “high”, “medium”, and “low”.

  FIG. 3 is a diagram for explaining an example of a method for estimating the driving load of the driver. As shown in FIG. 3, the estimated driving load level of the driver is estimated based on the relationship between the acquired vehicle speed and the absolute value of the steering angle. Specifically, the control device 10 includes a table that stores the relationship between the absolute values of the vehicle speed and the steering angle and the driving load of the driver as shown in the upper diagram of FIG. Here, as shown in the upper diagram of FIG. 3, the absolute values of the vehicle speed and the steering angle and the estimated driving load of the driver have the following relationship. That is, it is assumed that the driving load of the driver increases as the speed of the vehicle increases, and therefore the estimated driving load level of the driver is estimated to be high. Further, since it is assumed that the driving load on the driver increases as the absolute value of the steering angle increases, the estimated driving load level of the driver is estimated to be higher. Further, when both the absolute value of the vehicle speed and the steering angle increase, it is assumed that the driving load on the driver is higher than when only one of them is large, so the estimated driving load level is estimated to be high. . The driving load estimation function refers to this table to determine which driver's estimated driving load level in the upper diagram of FIG. 3 corresponds to the obtained absolute values of the vehicle speed and the steering angle. Estimated driving load level is estimated.

  In addition, when the turn signal lighting signal is acquired from the vehicle controller 200, the vehicle is predicted to change lanes, and therefore it is assumed that the driving load on the driver increases. Therefore, as shown in the lower diagram of FIG. 3, the reference value that separates the estimated driving load level of the driver (the value that becomes the boundary of each estimated driving load level) is changed to a lower vehicle speed and a smaller steering angle side than normal. The estimated driving load level of the driver may be estimated. Further, when the operating speed of the wiper acquired by the vehicle information acquisition function is Hi (high speed), it is predicted that the visibility and road surface conditions are deteriorated due to rainy weather. Expected to be higher. Therefore, also in this case, the estimated driving load level of the driver may be estimated by changing the reference value for determining the estimated driving load level of the driver to a lower vehicle speed and a smaller steering angle side than normal. . Furthermore, even when the audio device or air conditioner is operated by the driver, it is assumed that the driving load on the driver is high, so the reference value for determining the estimated driving load level of the driver is lower than normal. The estimated driving load level of the driver may be estimated by changing to the vehicle speed and the small steering angle side.

  Next, in step S108, it is determined whether the presentation information of the type selected by the information type selection function includes operation button information. FIG. 4A is a diagram illustrating an example of the presentation information displayed on the screen of the display 510 when the type of the presentation information is gasoline remaining amount information, and FIG. FIG. 7 is a diagram showing an example of presentation information displayed on the screen of the display 510 in the case of advice information that is efficient operation from the viewpoint of fuel. Here, the operation button information is information included in the presentation information, and is displayed as an icon of the operation button displayed on the screen of the display 510. Then, when the driver operates the operation button displayed on the screen of the display 510, information related to the presentation information is presented to the driver. For example, when the type of the presentation information is gasoline remaining amount information, as shown in FIG. 4A, an operation button for searching for a gas station existing around the vehicle is displayed on the screen of the display 510. Then, when the driver operates the operation buttons displayed on the screen, a gas station existing around the own vehicle is searched based on the map information acquired from the navigation device 400 and the position information of the own vehicle. The search result is displayed on the screen of the display 510. As described above, in order to acquire the information presented by the operation button, the driver needs to operate the operation button, obtain the presentation information including the operation button information, and obtain the presentation information including the operation button information. It takes a lot of time to recognize the content.

  On the other hand, so-called eco-driving advice information is a type of presentation information that does not include operation button information, and no operation button icon is displayed on the screen of the display 510 as shown in FIG. 4B. Therefore, in order for the driver to acquire eco-driving advice information and recognize the contents of eco-driving advice information, it is not necessary to operate the operation buttons at all, and it takes less time than the presentation information including the operation button information. The presentation information can be acquired and the contents of the presentation information can be recognized.

  If it is determined in step S108 that the presentation information does not include operation button information, the process proceeds to step S109. On the other hand, if it is determined that the presentation information includes operation button information, the process proceeds to step S110.

  In step S109, the presentation mode determination function determines whether the estimated driving load level of the driver estimated in step S107 is “high”. If the estimated driving load level of the estimated driver is “high”, the process proceeds to step S111. On the other hand, if the estimated driving load level of the estimated driver is “low” or “medium”, the process proceeds to step S112. move on.

  If it is determined in step S108 that the presentation information presented to the driver includes operation button information, the process proceeds to step S110. In step S110, the presentation mode determination function determines whether the estimated driving load level of the driver estimated in step S107 is “medium” or “high”. When the estimated driving load level of the estimated driver is “medium” or “high”, the process proceeds to step S111. On the other hand, when the estimated driving load level of the estimated driver is “low”, step S112 is performed. Proceed to

In step S111, the length of the presentation time Td for presenting the presentation information to the driver is extended based on the following formula (1) by the presentation mode determination function of the control device 10.
Td ′ = Td + Δt (1)
Here, Td ′ indicates the presentation time Td after being extended. Further, the extension time Δt is a cycle time Δt for one cycle of the driving load estimation process. After the presentation of presentation information is started in step S106, the driving load estimation process of the driver in step S107 is repeatedly executed at a predetermined cycle time Δt until the presentation of presentation information is completed in step S113. The cycle time Δt is a time for one cycle of the driving load estimation process. Further, since the driving load estimation process in step S107 is repeatedly executed at a predetermined cycle time Δt, the extension of the presentation time Td in step 111 is also performed in the cycle time Δt while the estimated driving load of the driver is equal to or greater than a predetermined value. Will be executed repeatedly. Therefore, the presentation mode determination function extends the presentation time Td for presenting the presentation information to the driver by the period time Δt, thereby reducing the presentation time Td by the time when the estimated driving load of the driver is equal to or greater than a predetermined value. Can be extended.

  The presentation mode determination function extends the presentation time Td when the estimated driving load level of the driver is greater than or equal to a predetermined value, but presents the presentation information including the operation button information and the presentation information not including the operation button information. The estimated driving load level at which the time Td is extended is different. That is, when the presentation information does not include operation button information, the length of the presentation time Td is extended when the estimated driving load level is “high”. On the other hand, when the presentation information includes operation button information, the length of the presentation time Td is extended when the estimated driving load level is “medium” or “high”. As described above, the estimated driving load level that extends the length of the presentation time is changed according to the content of the presentation information for the following reason. That is, for example, in the gasoline remaining amount information shown in FIG. 4A, as described above, in order to acquire information on the gas stations existing around the vehicle, the gas station search button displayed on the screen information on the display 510 is operated. More time is required to acquire and recognize the remaining amount of gasoline information including the gas station information around the vehicle as compared with the eco driving advice information shown in FIG. 4B that does not include the operation button information. Is done. Therefore, when the presentation information includes operation button information, the presentation information presentation time is not only when the estimated driving load level of the driver is “high” but also when the estimated driving load level of the driver is “medium”. By extending the length of Td, the driver obtains the presentation information including the operation button information and sufficiently secures the presentation time Td necessary for recognizing the content of the presentation information including the operation button information. be able to. As a result, even if it is presentation information that requires a lot of time for the driver to acquire and recognize like the presentation information including operation button information, the driver can acquire the presentation information, and the presentation information Can be recognized properly.

Further, the extension time for extending the presentation time Td is not limited to the cycle time Δt, and may be changed as appropriate. For example, when the presentation information includes operation button information and the estimated driving load level of the estimated driver is “high”, the presentation time Td may be extended based on the following equation (2).
Td ′ = Td + Δt × KT (2)
Here, KT is a predetermined coefficient. It is assumed that the higher the driving load on the driver, the more difficult it is for the driver to recognize the presentation information. Therefore, for example, in the presentation information including the operation button information, when the estimated driving load level is “high”, the period for extending the presentation time Td is longer than the period when the estimated driving load level is “medium”. By setting the time larger than the time Δt, it is possible to extend the presentation time Td according to the driving load of the driver. Thus, by changing the extension time according to the driving load or according to the content of the presentation information, the time required for the driver to acquire the presentation information and recognize the content of the presentation information is reduced. It can be secured appropriately.

  If the driver's driving load is estimated to be “low” or “medium” in step S109, the driver's driving load is estimated to be “low” in step S110, or the presentation time Td is extended in step S111. If yes, the process proceeds to step S112. In step S112, it is determined whether the presentation time Td has elapsed since the presentation of presentation information was started. If it is determined that the presentation time Td has elapsed, the process proceeds to step S113, and the presentation of the presentation information is terminated. On the other hand, if it is determined that the presentation time has not yet elapsed, the process returns to step S107, and the driving load of the driver is estimated again. As described above, the presentation information is continuously presented until the presentation time Td elapses. In addition, this information presentation process is complete | finished by complete | finishing presentation of presentation information by step S113.

  Here, FIG. 5 is a diagram for explaining a method of extending the presentation time Td when the presentation information does not include operation button information. For example, when the type of the presentation information is so-called eco-driving advice information, since the information presented by the operation button is not included, the driver has a shorter content of the eco-driving advice information than the presentation information including the operation button information. It is assumed that it can be recognized in time. In addition, when the type of the presentation information is so-called eco-driving advice information, the driver does not need to operate the operation button to acquire the presentation information or recognize the content of the presentation information. Even if the level is “medium”, it is assumed that the driver can recognize the content of the eco-driving advice information. Therefore, when the type of the presentation information is so-called eco-driving advice information, the presentation time Td for each period time Δt in step S110 only when the estimated driving load level of the driver estimated in step S109 is “high”. Is extended. As a result, as shown in FIG. 5, the presentation time Td set in advance as the standard presentation time Ts is equal to the standard presentation time Ts determined in advance for presenting the eco-driving advice information, and the estimated driving load level of the driver. Will be extended to the total time with the time Th when becomes “high”.

  FIG. 6 is a diagram for explaining a method of extending the presentation time Td when the presentation information includes operation button information. For example, when the type of presentation information is gasoline remaining amount information, in order for the driver to acquire and recognize information on a gas station existing around the vehicle included in the gasoline remaining amount information, the driver needs to display the screen of the display 510. It is necessary to search for a gas station by operating the operation button displayed above. Therefore, compared with presentation information that does not include operation button information such as eco-driving advice information, it takes a lot of time to acquire gasoline remaining amount information and recognize the contents of gasoline remaining amount information. In the case of gasoline remaining amount information, the driver needs to operate the operation button to acquire the presentation information or recognize the content of the presentation information, so the estimated driving load level of the driver is “medium”. Even so, it is assumed that it is difficult for the driver to recognize the contents of the eco-driving advice information. Therefore, when the presentation information includes operation button information such as gasoline remaining amount information, the estimated driving load level of the estimated driver is added to the case where the estimated driving load level of the estimated driver is “high”. Even if is “medium”, the presentation time Td is extended by the period time Δt in step S110. As a result, as shown in FIG. 6, the presentation time Td in which the standard presentation time Ts is set in advance is the standard presentation time Ts determined in advance for presenting the gasoline remaining amount information and the estimated driving load level of the driver. Is extended to the total time with the time Tm when “high” or “medium” is reached.

  As described above, in the first embodiment, when the driving load of the driver becomes a predetermined value or more when the presentation information is presented, the driving is performed at the standard presentation time Ts preset as the presentation time Td. The presentation time Td is extended by adding the time when the load is equal to or greater than the predetermined value. As a result, the driver's driving load suddenly increases, for example, due to a lane change or the like, so that the driver acquires and presents the presentation information within the standard presentation time Ts preset as the presentation time Td. Even in a situation where the content of the information cannot be recognized, the time required for the driver to acquire the presentation information and recognize the content of the presentation information can be secured by extending the presentation time Td. As a result, the driver can acquire the presentation information and can appropriately recognize the content of the presentation information. In particular, in the first embodiment, the presentation time Td is extended according to the time when the driving load of the driver has acquired the presentation information and the driving load is assumed to be inappropriate for the content of the presentation information. Is done. Therefore, the extended presentation time Td is appropriately set as a time required for the driver to obtain the presentation information and recognize the contents of the presentation information.

  In addition, in the first embodiment, the estimated driving load level for extending the presentation time is changed according to the content of the presentation information. For example, when the presentation information does not include operation button information, the presentation information Td is extended according to the time Th when the estimated driving load level of the driver becomes “high”. On the other hand, when the presentation information includes operation button information, in addition to the time when the estimated driving load level of the driver becomes “high”, the time Tm when the estimated driving load level of the driver becomes “medium”. Accordingly, the presentation information presentation time Td is extended. As described above, it is assumed that the presentation information that requires an operation to acquire information and the presentation information with a large amount of information require a lot of time for the driver to acquire and recognize the information. In addition, the presentation information that requires a lot of time for the driver to acquire and recognize the information is acquired even if the estimated driving load level of the driver is “medium”, Further, it is assumed that it is difficult to recognize the contents of the presentation information. Therefore, in the presentation information that requires a lot of time for the driver to acquire and recognize the information, the presentation information is presented in comparison with the presentation information that is easy for the driver to acquire and recognize the presentation information. The estimated driving load level for extending the time Td is set to a low level. As a result, for example, even if the presentation information that requires a long time for the driver to acquire and recognize the presentation information such as the presentation information including operation button information, the driver acquires and recognizes the presentation information. Therefore, it is possible to appropriately secure the time required for this, and as a result, it is possible to cause the driver to appropriately acquire the presentation information and to appropriately recognize the contents of the presentation information.

<< Second Embodiment >>
Next, the information presentation process according to the second embodiment will be described with reference to the flowchart shown in FIG. FIG. 7 is a flowchart showing information presentation processing according to the second embodiment. In the second embodiment, similarly to the first embodiment, in the vehicle having the configuration shown in FIG. 1, the driver's predicted driving load level when presenting the presentation information including the operation button information as described below. Is predicted to be “medium” or “high”, it is the same as in the first embodiment except that the timing of presenting the presentation information is delayed (steps S206 to S208). This information presentation process is also executed at regular time intervals by the control device 10 as in the first embodiment.

  Steps S201 to S204 are performed in the same manner as steps S101 to S104 in the first embodiment. That is, the information type selection function determines whether there is presentation information to be presented to the driver (step S201). If there is no presentation information to be presented, the information presentation process is terminated. On the other hand, when there is presentation information to be presented to the driver, vehicle information is acquired from the vehicle controller 200 by the vehicle information acquisition function (step S202), and then road information is acquired from the navigation device 400 by the road information acquisition function. (Step S203). Next, it is determined whether vehicle information / road information has been acquired (step S204). If vehicle information / road information is not acquired, the process returns to step 201. On the other hand, if vehicle information / road information is acquired, the process returns to step S205. move on.

  In step S205, the driving load prediction function predicts the driving load of the driver on the route from the position of the host vehicle to a predetermined point in the route on which the vehicle travels using the road information.

  FIG. 8 is a diagram for explaining an example of a method for predicting the driving load of the driver. In the present embodiment, the driving load prediction function includes a distance from a road shape position such as an intersection, a junction, a branching point, or a roundabout where the driving load of the driver is predicted to increase to the position of the host vehicle. The driver's driving load is predicted by comparing the reference distance L, which is a load prediction criterion. Specifically, when the distance from the position of the road shape predicted to increase the driving load of the driver to the position of the host vehicle is within the reference distance L, the driving load prediction function, as will be described later, The predicted driving load level of the driver is predicted as “high” or “medium” depending on the type of the vehicle. On the other hand, when the distance from the position of the road shape predicted to increase the driving load to the position of the host vehicle is larger than the reference distance L, the driving load prediction function indicates that the driver's predicted driving load level is “low”. Predict. In the example of the scene shown in FIG. 8, the driving load prediction function acquires the position information of the intersection on the route where the vehicle is predicted to travel and the position information of the own vehicle from the navigation device 400, and calculates the position from the position of the intersection. It is determined whether the distance to the position of the host vehicle is within the reference distance L. As shown in FIG. 8, since the distance from the position of the intersection to the position of the host vehicle is smaller than the reference distance L, the driving load prediction function predicts the predicted driving load level of the driver as “high” or “medium”. It will be.

表１に示すように、例えば、道路形状の種別が合流点または環状交差点の場合、運転者はこれら地点において他の車両などに注意を払う必要があるため、これら地点における運転者の運転負荷は高くなると想定される。そのため、道路形状の種別が合流点または環状交差点の場合、運転者の予測運転負荷レベルは「高」と予測される。一方、道路形状の種別が分岐点の場合、道路形状の種別が合流点または環状交差点の場合と比べ、運転者の運転負荷は低くなると想定されるため、運転者の予測運転負荷レベルは「中」と予測される。また、道路形状の種別が交差点の場合には、さらにナビゲーション装置４００による経路誘導があるか否かが判断され、経路誘導がない場合、または右左折の経路誘導がある場合には、運転者の運転負荷は高くなると想定されるため、運転者の予測運転負荷レベルは「高」と予測される。一方、道路形状の種別が交差点の場合に、直進の経路誘導がある場合は、運転者の予測運転負荷レベルは「中」と予測される。図８に示す例では、経路上の道路形状の種別が交差点であり、またナビゲーション装置４００から経路誘導情報を取得していないため、運転者の予測運転負荷レベルは「高」と予測される。 Here, when the distance from the position of the road shape predicted to increase the predicted driving load of the driver to the position of the host vehicle is within the reference distance L, the predicted driving of the driver predicted for each type of road shape An example of the load level is shown in the table below.

As shown in Table 1, for example, when the type of road shape is a confluence or a roundabout, the driver needs to pay attention to other vehicles at these points, so the driving load on the driver at these points is Expected to be higher. Therefore, when the road shape type is a confluence or a roundabout, the predicted driving load level of the driver is predicted to be “high”. On the other hand, when the road shape type is a branch point, the driver's driving load is assumed to be lower than when the road shape type is a junction or a roundabout. Is predicted. When the road shape type is an intersection, it is further determined whether or not there is a route guidance by the navigation device 400. If there is no route guidance or if there is a right / left turn route guidance, the driver's Since the driving load is assumed to be high, the predicted driving load level of the driver is predicted to be “high”. On the other hand, when the road shape type is an intersection and there is a straight route guidance, the predicted driving load level of the driver is predicted to be “medium”. In the example illustrated in FIG. 8, the type of road shape on the route is an intersection, and route guidance information is not acquired from the navigation device 400, so the predicted driving load level of the driver is predicted to be “high”.

The reference distance L may be an arbitrarily set distance, but may be calculated based on the following formula so as to be a distance according to the vehicle speed.
L [m] = K x V [km / h]
Here, K is a constant set as appropriate, and V indicates the vehicle speed. Since it is assumed that the driver's driving load increases as the vehicle speed increases, the reference distance L, which is a criterion for determining the predicted driving load level, is calculated as a larger value as the vehicle speed increases. Thus, the driving load on the driver can be appropriately predicted.

  In addition, the driving load prediction function acquires meteorological information on a route predicted for the vehicle to travel from the telematics database via the communication device 420 of the navigation device 400, and based on the acquired meteorological information, The operating load may be predicted.

  In step S206, it is determined by the presentation mode determination function whether the presentation information includes operation button information. For example, when the presentation information includes operation button information as in the gasoline remaining amount information in FIG. 4A, the process proceeds to step S207. On the other hand, as shown in the eco-driving advice information illustrated in FIG. If NO is included, the process proceeds to step S209.

  Next, in step S207, the presentation mode determination function determines whether the predicted driving load level of the driver predicted in step S205 is “medium” or “high”. That is, in step S207, it is determined whether or not a scene predicted to increase the driving load on the driver is approaching on the route along which the vehicle travels. If the predicted driving load level of the driver is determined to be “medium” or “high”, it is determined that a scene in which the driving load of the driver becomes high is approaching, and the process proceeds to step S208. On the other hand, when it is determined that the estimated predicted driving load level of the driver is “low”, it is determined that the scene where the driving load of the driver becomes high is not approaching, and the process proceeds to step S209.

  Next, in step S208, the timing of starting the presentation of presentation information is delayed by returning to step S205 after a predetermined time has elapsed without starting the presentation of presentation information.

Here, FIG. 9 is a diagram for explaining a method of delaying the presentation start timing of the presentation information. In the example scene shown in Figure 9, the present embodiment determines function, presentation start timing is determined to present a pre-presentation information from the time T _1. However, was predicting a prediction operation load level of the driver at the time T _0, the scene prediction operation load level of the driver from the time T ₀ is the predicted range of operating load up to the time T ₂ is set to "medium" to predict Is done. Therefore, the presentation mode determining function, instead of presenting the presentation information from the presentation start time T ₁ which has been scheduled, from the time the scene prediction operation load level of the driver is "medium" or "high" is not expected The presentation information presentation start timing is delayed so that the presentation information can be presented. For example, after the forecast of operating loads at time T _0, when predicting the prediction operation load level of the driver at the time T _2,, is the operating load level at the time T _2, which is the expected range of operating loads up to time T ₃ ' A scene of “medium” or “high” is predicted. Since prediction operation load level predicted at time T ₂ are "medium" or "high", the presentation of presentation information is not started, the prediction processing operation load is continued. Then, after predicting the driving load at time T ₂ , if the driver's predicted driving load level is predicted at time T ₄ , the driver's predicted driving from time T ₄ to time T _5, which is the driving load prediction range, is performed. A scene where the load level is “medium” or “high” is not predicted. Therefore, presentation mode determining function determines the presentation start timing at time T _4. Then, the information presentation apparatus 500, from the time _{T 4} by the standard presentation time Ts, i.e. between the time _{T 4} to time _{T 6,} performs presentation of presentation information. In this way, in the example shown in FIG. 9, since the estimated driving load level of the driver is predicted to be “medium” or “high” immediately after the time T ₁ when the presentation information is scheduled to be presented, the presentation information the timing to start the presentation, from the presentation scheduled start time T _1, the prediction operation load level is delayed until time T ₄ to be "low".

  If it is determined that a scene in which the driver's driving load is high is approaching on the route on which the vehicle is traveling, the driver may be able to reduce the driving load if the presentation information is presented at a predetermined presentation start timing. When the presentation information is acquired after being reduced, and when the driver recognizes the contents of the presentation information, the driver cannot acquire sufficient time to acquire the presentation information and recognize the contents of the presentation information. There is. However, when presenting presentation information including operation button information, if it is predicted that a scene in which the driver's driving load will increase will be approaching, the timing for starting presentation of the presentation information will be By delaying until the load becomes low, the presentation information can be presented for a presentation time Td after the driving load of the driver is low. As a result, the driver can obtain the presentation information like the presentation information including the operation button information, and even if the presentation information requires a lot of time to recognize the content of the presentation information, the driver's driving By presenting the presentation information after the load becomes low, the driver can acquire the presentation information and appropriately recognize the contents of the presentation information.

  Returning to the flowchart of FIG. 7, the processing after step S209 will be described. In steps S209 to 217, processing similar to that in steps S105 to S113 of the first embodiment is performed. That is, in step S209, the standard presentation time Ts is set as the presentation time Td. Next, in step S210, presentation of presentation information is started by the information presentation apparatus 500. In step S211, the driving load is estimated based on the vehicle information as shown in FIG. In the subsequent step S212, it is determined whether the presentation information includes operation button information. If the operation button information is not included, the process proceeds to step S213. If the display information includes operation button information, the process proceeds to step S214. In step S213, it is determined whether or not the estimated driving load level of the driver estimated in step S211 is “high”. If the estimated driving load level is “high”, the process proceeds to step S215, and the presentation time Td is the period time Δt. Extended. On the other hand, if it is determined in step S213 that the estimated driving load level is “medium” or “low”, the process proceeds to step S216. In step S214, it is determined whether the estimated driving load level of the driver estimated in step S211 is “medium” or “high”. If the estimated driving load level is “medium” or “high”, step S215 is performed. The presentation time Td is extended by the cycle time Δt. On the other hand, if it is determined in step S214 that the estimated driving load level is “low”, the process proceeds to step S216. In step S216, it is determined whether the presentation time Td has elapsed since the presentation information was presented. If the presentation time Td has not elapsed, the process returns to step S211. If the presentation time Td has elapsed, the process proceeds to step S217. . In step S217, presentation of the presentation information is terminated, and the presentation information processing is also terminated.

  If it is predicted that a scene in which the driver's driving load will increase, such as a junction, a junction, an intersection, or a roundabout, is approaching immediately after the start timing of starting the presentation of the original presentation information, It is assumed that it is difficult for the driver to acquire and recognize the presentation information including the button information within the preset presentation time Td. Therefore, in the second embodiment, when it is predicted that a scene in which the driver's predicted driving load is high is approaching immediately after the disclosure timing at which the presentation of the presentation information including the operation button information is started, the presentation information Is delayed until the driver's driving load becomes low. As a result, for the presentation information that does not include the operation button information, the driver can quickly obtain the presentation information. On the other hand, the presentation information that includes the operation button information passes through a scene where the driver's driving load is high. By presenting the presentation information to the driver after the driver's driving load is reduced, the driver can acquire the presentation information and appropriately recognize the content of the presentation information.

  For example, in the case where the presentation information is traffic congestion information related to a traffic congestion point immediately after the next intersection, the driver's driving load at the next intersection is greater than or equal to a predetermined value, so the start timing for starting the presentation of presentation information is If it is extended until after passing through the next intersection, the driver will acquire information on the traffic congestion point immediately after the next intersection after the next intersection, and the presentation value of this presentation information will be lost. I will be broken. Thus, in the case of presentation information that needs to be presented before passing a scene where the driver's driving load is high, it is preferable to start presenting the presentation information regardless of the driver's driving load.

«Third embodiment»
Next, the information presentation process according to the third embodiment will be described with reference to the flowchart of FIG. FIG. 10 is a flowchart of the presentation information processing according to the third embodiment. In the third embodiment, similarly to the first embodiment, in the vehicle having the configuration shown in FIG. 1, the state where the driving load of the driver is equal to or greater than a predetermined value is equal to or greater than the predetermined time Swl as described below. In this case, this presentation information is added to the presentation history list, and the presentation information is terminated (steps S312 and 313). This information presentation process is also executed at regular time intervals by the control device 10 as in the first embodiment.

  In steps S301 to S311, processing similar to that in steps S101 to 111 of the first embodiment is performed. That is, it is determined by the information type selection function whether there is presentation information to be presented to the driver (step S301). If there is no presentation information to be presented to the driver, the information presentation process is terminated. On the other hand, when there is presentation information to be presented to the driver, vehicle information is acquired from the vehicle controller 200 by the vehicle information acquisition function (step S302), and road information is acquired from the navigation device 400 by the road information acquisition function ( Step S303). Then, it is determined whether the vehicle information / road information has been acquired (step S304). If the vehicle information / road information is not acquired, the process returns to step 301. On the other hand, if the vehicle information / road information is acquired, the driver is notified. A standard presentation time Ts determined in advance for presenting the presentation information is set as the presentation time Td (step S305), and presentation of the presentation information is started (step S306).

  Subsequently, the driving load of the driver is estimated based on the acquired road information and vehicle information by the driving load estimation function (step S307). In addition, what is necessary is just to estimate a driver | operator's driving load based on vehicle information, as shown in FIG. Thereafter, the presentation mode determination function determines whether the presentation information includes the operation button information (step S308). If the presentation information does not include the operation button information, the estimated driving load level of the estimated driver is “high”. On the other hand, if the presented information includes operation button information, it is determined whether the estimated driving load level of the estimated driver is “medium” or “high” (step S310). When the estimated driving load level of the driver estimated in the presentation information not including the operation button information is “high”, or the estimated driving load level of the driver estimated in the presentation information including the operation button information is “medium” or If it is “high”, the presentation time Td is extended (step S311).

  In step S311, the presentation time Td is extended, and in the presentation information that does not include the operation button information, the time Th when the estimated driving load level of the driver is “high” or the presentation information that includes the operation button information. A time Tm in which the estimated driving load level of the driver is “medium” or “high” is counted by the timer 14 of the control device 10.

  Next, in step S312, the presentation mode determination function allows the driver to use the time Th when the estimated driving load level of the driver is “high” in the presentation information that does not include the operation button information, or the driver information in the presentation information that includes the operation button information. It is determined whether the time Tm during which the estimated driving load level is “medium” or “high” is equal to or longer than the predetermined time Swl. When the time Th or Tm is equal to or longer than the predetermined time Swl, the process proceeds to step S313. On the other hand, when the time Th or Tm is less than the predetermined time Swl, the process proceeds to step S314.

  In step S313, the presently presented presentation information is added to the presentation history list in the RAM 13 of the control device 10 together with the time when the presentation information was presented and the position information where the presentation information was presented by the storage function of the control device 10. Is done.

  Here, FIG. 11 is a diagram showing an example of a presentation history list displayed on the screen of the display 510. FIG. As described above, when the time during which the estimated driving load of the driver is equal to or greater than the predetermined value is equal to or greater than the predetermined time Swl, the presently presented presentation information includes the time when the presentation information presentation starts and It is added to the presentation history list provided in the RAM 13 of the control device 10 together with the position information on the map where presentation of the presentation information is started. As a result, as shown in FIG. 11, the type name of the presentation information and the time at which presentation of the presentation information is started are displayed on the screen of the display 510 by the driver's operation or the like. By selecting the presentation information on the screen, the position on the map where presentation of the presentation information is started is displayed. As a result, the driver can confirm the presentation information that could not be confirmed when the driver's driving load is high, for example, after the driver's driving load has decreased.

  The storage function determines whether the presentation information added to the presentation history list is useful information for the driver, and determines that the presentation information added to the presentation history list is not useful information for the driver. Adds the vehicle state or road condition of the current vehicle corresponding to the presentation information to the presentation information added to the presentation history list. Note that the criterion for determining whether or not the presentation information added to the presentation history list is useful information is set as appropriate. For example, the vehicle passes through the place where the presentation information is targeted and becomes the subject of the presentation information. The vehicle status and road status indicated by the presentation information added to the presentation history list, and the current vehicle status and road status due to the passage of time or the driver taking a predetermined action on the content of the presentation information. Are different from each other, it is determined that the presentation information added to the presentation history list is not useful information.

  For example, when the presentation information “low gasoline remaining” is added to the presentation history list, the presentation information “low gasoline remaining” is displayed on the screen of the display 510 as shown in the upper diagram of FIG. Is done. After that, when the driver refuels the presentation information that the gasoline remaining amount is low, the storage function displays the vehicle status of the gasoline information low that the presentation information indicates and the current gasoline remaining amount. It is different from the quantity state, and it is determined that the information is not useful for the driver. Therefore, the storage function adds information “refueled” indicating the current state of the gasoline remaining amount of the vehicle to the presentation information “reduced gasoline remaining amount” stored in the presentation history list. Thereby, as shown in the lower diagram of FIG. 11, the driver can check the information “refueled” for the presentation information “low gasoline remaining amount” in the presentation history list on the screen of the display 510, The driver can grasp that the state of low gasoline remaining indicated by the presentation information “low gasoline remaining” has been resolved.

  Further, as another example, when presentation information “washer liquid remaining amount reduction” indicating that the amount of washer liquid used by being injected into a vehicle window has been reduced is added to the presentation history list, FIG. As shown in the upper diagram, the presentation information “Washer liquid level reduction” is displayed on the screen of the display 510. After that, when the driver replenishes the washer fluid, the memory function indicates that the state of “low washer fluid remaining” indicated by the presentation information is different from the current state of the remaining washer fluid. Judge that it is not useful information. Therefore, the storage function adds information “replenished” indicating that the washer liquid has been replenished to the presentation information “decrease in remaining amount of washer liquid” stored in the presentation history list. Accordingly, as shown in the lower diagram of FIG. 11, the driver can confirm the information “replenished” with respect to the presentation information “reduced remaining amount of washer fluid” on the screen of the display 510. It can be grasped that the state of the decrease in the remaining amount of the washer fluid indicated by the presentation information “reduced remaining amount of the washer fluid” has been eliminated.

  As yet another example, although not shown in FIG. 11, if presentation information “start construction” indicating that construction is being performed on a road around the vehicle is added to the presentation history list, the driver By confirming the presentation information “construction start” in the presentation history list, it is possible to confirm the time when the construction was started and the place where the construction was started. Further, when the construction is completed, the storage function determines that the time to be information has passed, and the presentation information “start construction” is not useful information for the driver. Then, the storage function adds information “construction end” indicating the current construction status to the presentation information “construction start”. Thereby, the driver can grasp that the construction indicated by the presentation information “construction start” in the presentation history list is completed.

  As another example, when presentation information “this destination traffic jam” indicating traffic jam information on a route on which the vehicle is traveling is added to the presentation history list, the driver presents “this destination traffic jam” in the presentation history list. By confirming the information, it is possible to confirm the time when the traffic jam occurs and the location where the traffic jam occurs. In addition, when the vehicle passes through the traffic jam point indicated by the traffic jam information, or when the vehicle leaves the traffic jam point indicated by the traffic jam information, the storage function passes through the location targeted for information. It is determined that the presentation information “this traffic jam” is not useful information for the driver. Then, the storage function adds information such as “passed” indicating the current situation to the presentation information “this traffic jam”. Thereby, the driver can grasp that the traffic jam indicated by the presentation information “this traffic jam” in the presentation history list has been resolved.

  Note that the storage function may delete the presentation information added to the presentation history list from the presentation history list when it is determined that the presentation information added to the presentation history list is not useful information for the driver. For example, when gasoline is supplied by the driver after the presentation information “low gasoline remaining” is added to the presentation history list, the presentation information “low gasoline remaining” added to the presentation history list is “ Instead of adding the information “refueled”, the presentation information “reduced gasoline amount” may be deleted from the presentation history list. Thus, the driver can easily grasp only information useful for the driver by referring to the presentation history list.

  After adding the presentation information to the presentation history list in step S313, the process proceeds to step S315, and the presentation of the presentation information is finished. That is, after the presentation information is added to the presentation history list in step S313, the presentation of the presentation information is ended even before the presentation time Td has elapsed.

  In addition, when the driver's driving load estimated in the presentation information not including the operation button information is not “high”, or the driver's driving load estimated in the presentation information including the operation button information is “medium” or “high”. Otherwise, if the time Th or Tm is less than the predetermined time Sw1, the process proceeds to step S314. In step S314, it is determined whether the presentation time Td has elapsed since the presentation information was presented. If the presentation time Td has not elapsed since the presentation information was presented, the process returns to step S307, while the presentation information is presented. If the presentation time Td has elapsed, the process proceeds to step S315, the presentation of presentation information is terminated, and the information presentation process is terminated.

When presenting the presentation information, if the time during which the driver's driving load is higher than the predetermined value is equal to or longer than the predetermined time Swl, the driver may continue to present the presentation information as it is. It is assumed that it is difficult to acquire the presentation information and recognize the contents of the presentation information. Therefore, in the third embodiment, when the presentation information is presented, if the time during which the driving load of the driver is higher than the predetermined value is equal to or longer than the predetermined time Swl, the presented presentation is performed. Information is added to the presentation history list, and the presentation of the presented presentation information is terminated. As a result, even if the driver obtains the presentation information because the driver's driving load is high and the content of the presentation information cannot be recognized, the driver uses the presentation information added to the presentation history list. This can be confirmed reliably after the operating load of the vehicle becomes low.

  Further, in the third embodiment, the vehicle passes through the location that is the target of the presentation information, the time that is the target of the presentation information has elapsed, or the driver has taken a predetermined action on the content of the presentation information, etc. If the vehicle state or road state presented by the presentation information is different from the current vehicle state or road state, it is determined that the presentation information added to the presentation history list is not useful information for the driver, and the presentation history list The information on the vehicle state or the road condition of the current vehicle corresponding to the presentation information is added to the presentation information added to the item. As a result, the driver can easily grasp whether the presentation information displayed in the presentation history list is useful information or unnecessary information for the driver. In addition, when it is determined that the presentation information added to the presentation history list is not useful information for the driver, the presentation information added to the presentation history list may be deleted from the presentation history list. In this case, the driver can grasp only information useful for the driver by referring to the presentation history list.

  The embodiment described above is described for facilitating understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  That is, the present invention is not limited to the above-described embodiment, and may be implemented by combining the above-described first to third embodiments.

  In the present embodiment, the driving load of the driver is estimated by dividing into three levels of “high”, “medium”, and “low”. For example, the driving load of “high” and “low” is estimated. The estimation may be performed by dividing into levels, or may be performed by dividing into more levels than three stages of “high”, “medium”, and “low”.

  Furthermore, when estimating the driving load of the driver, the driving load of the driver may be estimated by calculating the driving load of the driver as a numerical value based on vehicle information or the like.

  In the above-described embodiment, the driver's driving load is estimated using vehicle information as shown in FIG. 4, but the method of estimating the driver's driving load is not limited to this. For example, FIG. As shown, the driving load on the driver may be estimated using road information. In the second embodiment, the driver's driving load is predicted using road information as shown in FIG. 8, but the method of predicting the driver's driving load is not limited to this. For example, FIG. As shown, the driver's driving load may be predicted using the vehicle information, or the driving load will be increased on the assumption that the vehicle turns right or left or changes lanes by obtaining a turn signal lighting signal. May be.

  Note that the driving load estimation function of the above-described embodiment is the estimation means of the present invention, the driving load prediction function is the prediction means of the present invention, the presentation mode setting function is the presentation mode setting means of the present invention, and the storage function is the present invention. The information presenting apparatus 500 corresponds to the presenting means of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Information presentation unit 10 ... Control apparatus 200 ... Vehicle controller 300 ... Various sensors 301 ... Vehicle speed sensor 302 ... Steering angle sensor 400 ... Navigation apparatus 500 ... Information presentation apparatus 510 ... Display 520 ... Speaker

Claims (10)

Estimating means for estimating the driving load of the driver based on the vehicle state and / or road condition of the host vehicle;
Based on the estimated driving load of the estimated driver, a presentation mode of the presentation information including the length of the presentation time of the presentation information presented to the driver and the start timing of the presentation time of the presentation information presented to the driver. A presentation mode determining means for determining;
Presenting means for presenting the presentation information to the driver in the presentation aspect determined by the presentation aspect determining means;
A storage means for storing the presentation information presented to the driver, and an information presentation device comprising:
When presenting the presentation information, the presentation mode determining means is configured to extend the length of the presentation time when the estimated driving load of the estimated driver exceeds a predetermined value. Change how information is presented,
The storage means stores the presentation information when the estimated driving load of the driver is greater than or equal to a predetermined value when the presentation information is being presented for a predetermined time or longer. Information presentation device. The information presentation device according to claim 1,
When presenting the presentation information, the presentation mode determining means is configured to extend the length of the presentation time according to a time when the estimated driving load of the driver is equal to or greater than a predetermined value. An information presentation apparatus characterized by changing a presentation mode of information. The information presentation device according to claim 1 or 2,
Based on the vehicle state of the host vehicle and / or road conditions, further comprising a predicting means for predicting the driving load of the driver on the route to the predetermined point on the route on which the vehicle travels,
When presenting the presentation information, the presentation mode determining means delays the presentation timing start timing when it is determined that the predicted driving load of the driver predicted by the prediction means exceeds a predetermined value. An information presentation apparatus that changes a presentation mode of the presentation information. The information presentation device according to claim 3,
When the presentation mode determining means determines that the predicted driving load of the driver does not exceed a predetermined value when the start timing of the presentation time is delayed, the presentation means sends the presentation information to the driver. The information presentation apparatus characterized by starting presentation of. The information presentation device according to any one of claims 1 to 4,
The information presentation apparatus, wherein the presentation mode determination unit changes the size of the predetermined value according to the content of the presentation information. An information presentation device according to any one of claims 1 to 5,
It said presenting means, when presenting the presentation information, if the state estimation operation load of the driver is equal to or greater than a predetermined value is equal to or more than a predetermined time, ending the presentation of the previous SL presentation information An information presentation device characterized by the above. The information presentation device according to any one of claims 1 to 6 ,
The presenting means presents the presentation information stored by the storage means based on a driver's operation. The information presentation device according to claim 1,
The storage means adds information on a current vehicle state or road situation corresponding to the stored presentation information to the stored presentation information in accordance with a vehicle state of the host vehicle or the road situation. Characteristic information presentation device. The information presentation device according to claim 1,
The storage means determines whether the stored presentation information is useful to the driver based on the vehicle state of the host vehicle or the road situation, and the stored presentation information is useful to the driver. An information presenting apparatus that erases the stored presentation information when it is determined that the information is not correct. In an information presentation method for presenting predetermined presentation information to a driver using an information presentation device including a calculation unit, a presentation unit, and a storage unit,
Estimates the driving load of the driver based on the vehicle state and / or road conditions of the vehicle, when presenting the presentation information to the driver, the operating load of the estimated driver becomes equal to or higher than a predetermined value When the presentation information is presented to the driver, the estimated driving load of the driver is greater than or equal to a predetermined value when the presentation information is presented. If it becomes, the information presenting method is characterized in that the presenting information is stored .

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