JP2004294429A - Method and device for exhibiting information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance operability, and to search a return home route to be in time for a return home time desired by a user. <P>SOLUTION: An on-vehicle information device 1 is provided with an own position storage part 102 for holding preliminarily own home position of the user, a return home time storage part 103 for holding preliminarily a return home time of the user, a present position acquiring part 106 for acquiring the present position of the user, a present time acquiring part 107 for acquiring the present time of the user, a route searching part 108 for acquiring the return home route from the present position to the own home position, a required time for the return home route, and a departure time to start the present position required to return home before the return home time, and an exhibition part 111 for comparing the departure time acquired by the route searching part 108 with the present time, and for exhibiting to the user the departure time acquired by the route searching part 108, and the return home route, before the departure time passed away. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information presentation device such as a vehicle information device that presents information to a user using a vehicle, and an information presentation method.

In recent years, automobiles have become widespread among family users (housewives and their children), and it has become common for vehicles to be equipped with a vehicle information device (car navigation device) in order to assist the driving of family users. .
In a conventional vehicle information device, when a user inputs a destination when departing by car from a certain destination, the user searches for a route that requires the shortest time from the current location to the destination for each time zone. The route and the required time are presented to the user for each time zone (for example, Patent Document 1).

Another conventional vehicle information device sets an upper limit cost per unit distance allowed by a user together with a destination, and automatically searches for a route using a toll road within a range not exceeding this cost. In some cases, a route from the current location to the destination, which meets the user's preference for using a toll road, is presented to the user (for example, see Patent Literature 2).
JP-A-9-101162 (page 1, FIG. 1) JP 2001-21375 A (Page 1, FIG. 8)

However, in the conventional vehicle information device, even a user of a family group whose home is mostly a home has to input the destination (home) every time when returning to home, which is very complicated.
Here, in the case of family members, for example, in order to meet the curfew time in the case of a daughter, or to prepare for dinner in the case of a housewife, the user's return time is often determined. . In addition, there is a demand for users of the family class to reflect their preferences as much as possible on the route selection to home. This preference includes, for example, those who do not want to use a toll road (do not want to spend money), or who want to drive with ease (use a road with few intersections, use a wide road). .

  However, the conventional vehicle information device only considers traveling from the current location to a different destination every time, and performs route search and required time calculation by focusing on returning to home from a destination. Could not. That is, in general, when a user goes out, he or she is going out with a desire to "return to home at least at what time at most", and the time of returning home is often set to be substantially constant regardless of the destination. In such a situation, when using the conventional in-vehicle information device, the destination is set at home in order to know when to leave the place to go home to return to the desired time, Since it is necessary to perform an operation of back-calculating the time to depart from the required time to be presented, the user experiences discomfort to perform the same operation every time he goes out.

  Considering cases such as long stays on the go and delayed departure time, sometimes toll roads that are not normally used may be used on time to return home in time, The user's route preferences may change. In such a situation, when the conventional in-vehicle information device is used, it is necessary to perform an operation for requesting to perform a route search different from the normal route preference. Occurs.

  Such a problem is not limited to the vehicle information device, but can be generally applied to an information presentation device that acquires a route to be followed by a user and presents information including the obtained route to the user.

  The present invention has been made in view of such a conventional problem, and it is possible to obtain information on whether to leave home and arrive at home by the time of returning home, regardless of where the user goes without troublesome operation. Can be presented to the user, and if it is determined that performing a route search that reflects the user's route preference is not in time for returning home, the ratio of reflecting the user's route preference is automatically changed. An object of the present invention is to provide an information presenting apparatus and an information presenting method for performing a route search.

That is, a first object is to provide an information presenting apparatus and an information presenting method that improve operability and perform a home return route search in time for returning home desired by a user.
It is a second object of the present invention to provide an information presenting apparatus and an information presenting method for performing a home return route search that matches the user's preference as much as possible.

  In order to achieve the first object, an information presenting apparatus according to the present invention is an information presenting apparatus that obtains a route to be followed by a user and presents information including the obtained route to the user. Home position holding means for holding the home position in advance, return time holding means for holding the user's return time in advance, current position obtaining means for obtaining the current position of the user, and current time obtaining means for obtaining the current time. Acquiring means for acquiring a return route from the current position to the home position, a required time of the return route, and a departure time for departure from the current position required to return home by the return time. Presentation means for comparing the departure time acquired by the acquisition means with the current time, and presenting the user with the departure time acquired by the acquisition means and the return route before the departure time has elapsed. Characterized in that it comprises a.

  Thereby, the information presentation device of the present invention automatically selects a return route within a range in time for the return time desired by the user, and notifies the user of when to leave the place to go. It is possible to return home by the desired return time by using the route without being conscious of whether there is a margin.

  Further, in order to achieve the second object, in the information presenting device according to the present invention, the information presenting device further includes a preference accumulating unit that accumulates a user's preference relating to route selection in advance, and the acquiring unit includes: And acquiring a return route in consideration of the preference related to the route selection stored in the preference storage means.

  As a result, the user can return home by the desired return time using the route that best suits his / her preference.

Here, in the information presenting device according to the present invention, the information presenting device is installed in a vehicle driven by a user, and further includes a map data holding unit that holds map data, and the obtaining unit includes the map data The return route, the required time of the return route, and the departure time, and the presenting unit presents the route of the vehicle on the return route on a map. .
Thereby, the user can drive without hesitation even in an unfamiliar place.

  Further, in the information presentation device according to the present invention, the information presentation device further includes an operation unit operated by a user, and the acquisition unit searches the return route when the operation unit is operated. May be a feature. Further, in the information presenting apparatus according to the present invention, the acquisition means may include “every predetermined time”, “every time a certain distance is traveled”, “when stopped at an intersection signal”, “new traffic information, etc. The home search route may be searched for at least one dynamic timing when the VICS information is acquired and when the route of the vehicle deviates from the guidance route.

  As a result, a route search or a re-search can be performed at an appropriate timing, and an optimal return route at that time can be obtained.

  Further, in the information presentation apparatus according to the present invention, the preference relating to the route selection accumulated by the preference accumulation means may be “whether a toll road or a general road is prioritized” or “whether a road having a wide road width is prioritized. And "Whether to give priority to a road with a small number of intersections".

Further, in the information presenting device according to the present invention, the information presenting device further includes a control unit that controls a degree of considering a preference regarding home return route selection used by the obtaining unit, the control unit includes a current time, The return time and the required time of the return route acquired by the acquisition unit are compared, and it is determined whether the return route obtained by the acquisition unit is in time for the return home time. It may also be characterized in that the acquisition means is requested to perform a route search again with the preference for the route selection changed to be shorter.
As a result, the range of the return route is expanded, and it is possible to return home by the return time.

Further, in the information presentation apparatus according to the present invention, when the control unit issues a request for changing the route selection preference and re-searching the route to the acquisition unit, a route selection set by a user is performed. It may be characterized by presenting to the user that the preference of the user has been changed.
Thereby, the user can know that the route search with the changed preference has been performed.

Further, in the information presentation apparatus according to the present invention, when the control unit issues a request for changing the preference regarding the route selection to the acquisition unit and re-searching the route, the control unit selects the route selection stored in the preference storage unit. It may be characterized in that the preference of the user is updated to the one after the change.
As a result, the options for returning home are expanded.

  Further, in the information presentation device according to the present invention, the information presentation device further includes a user designation unit for designating a user who drives the vehicle from among a plurality of users, and the return time holding unit includes The preference storage means stores in advance the preference related to the route selection for each user, and the acquisition means sets the return home in consideration of the preference related to the user's route selection designated by the user designating means. It may be characterized in that a route is obtained.

  With this, even if there are a plurality of drivers of the vehicle, a simple operation is performed to automatically select a return route within a range in time for the return time desired by the user, and notify the user of when to leave the place to go. This allows the user to return home by the desired home return time using a route that matches the preference without being conscious of whether there is enough time.

  Further, in the information presentation device according to the present invention, the information presentation device further includes a user authentication unit for authenticating a user who drives the vehicle from among the plurality of users, and the return time holding unit includes: The preference storage means stores in advance the preference related to the route selection for each user, and the acquisition means sets the return home in consideration of the preference related to the route selection of the user authenticated by the user authentication means. It may be characterized in that a route is obtained.

  This makes it possible to automatically select a return route within a range in time for the return time desired by the user even if there are multiple drivers of the vehicle and do not perform any operation, and determine when to leave the place to go. By notifying the user, the user can return home by the desired home return time using a route that matches his / her preference without being aware of whether there is enough time.

  The present invention can be realized not only as such an information presenting apparatus, but also as a portable information presenting apparatus, or as an information presenting step in which a characteristic means included in such an information presenting apparatus is provided as a step. It can also be realized as a method or as a program that causes a computer to execute those steps. Needless to say, such a program can be distributed via a recording medium such as a CD-ROM or a transmission medium such as the Internet.

  As is clear from the above description, according to the information presenting apparatus of the present invention, a route reflecting the user's preference is automatically selected within a range in time for the user's desired home return time, and when the user departs outside, By notifying the user of whether or not to allow the user to return, the user can return home by the desired return home time using a route that best suits the user's preference without being conscious of whether there is enough time.

  Therefore, according to the present invention, it is possible to improve operability, perform a return route search in time for a return time desired by a user, or perform a return route search that matches the user's preference as much as possible. The practical value of the invention of the present application is extremely high in today when the technology has become widespread.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a diagram showing an overall configuration when an information presentation device according to Embodiment 1 of the present invention is applied to an in-vehicle information device (car navigation device).
As shown in FIG. 1, the in-vehicle information device 1 includes an in-vehicle information device main body 10, a remote control device 20, a plurality of (two shown) speakers 30, and the like.

  The in-vehicle information device main body 10 displays the route information by combining the current position of the car and the map data, which change moment by moment, according to the information received from the remote control device 20, and displays the route to return to home or the time to return home. Or the like to assist the driver (user) in driving. The in-vehicle information device main body 10 receives television broadcast data and reproduces a video, or receives road information by FM broadcast or a beacon and guides the user to avoid a traffic jam.

The remote control device 20 includes an infrared transmission module, a plurality of operation buttons, and the like. The remote control device 20 receives an input of an operation button operation by a driver (user), and transmits information corresponding to the operation to the vehicle-mounted information device main body 10 wirelessly (infrared light). ) To send.
The speaker 30 reproduces audio of navigation information and television audio.

FIG. 2 is a diagram showing a configuration example of operation buttons provided on remote control device 20 shown in FIG.
On the casing surface of the remote control device 20, a switching button 201 for switching between the navigation mode and the reproduction mode, a decision button 202 for deciding an input or the like, a cursor moving button 203 for moving a cursor, a previous screen Button 204 for returning to the destination, a menu / destination button 205 for displaying various menus or displaying registered destinations (destinations), displaying the current location, or arriving at the next branch intersection or destination A current location button 206 for providing guidance of the predicted time by voice, a wide area / detail button 207 for increasing the scale of the map to display a wide area, or reducing the scale to display a detailed area; A traffic jam for displaying the situation, giving voice guidance, and displaying a bypass to avoid the traffic jam when a traffic jam occurs / Destination button 208, volume button 209 for setting the volume of speaker 30, destination registration / call button 210 for registering a destination and calling a registered destination, operation when returning home, etc. A button 211 for returning to the home to be operated is provided. By operating these buttons 201 to 211, an instruction for desired navigation can be input.

  The lower part of the casing is constituted by a lid that can be opened and closed, and a ten key or the like for selecting a channel of the television is provided on the surface of the casing with the lid opened.

  FIG. 3 is a block diagram showing a hardware configuration of the in-vehicle information device main body 10 shown in FIG. Note that the remote control device 20 and the speaker 30 are also illustrated.

  The in-vehicle information device main body 10 includes a communication interface 110, an amplifier 120, a display 130, a GPS (Global Positioning System) device 140, a travel sensor 150, a direction sensor 160, a receiving unit 170, and an HD (hardware). A disk (disk) 180 and a CPU (Central Processing Unit) 190 are provided.

Communication interface 110 receives information from remote control device 20.
Amplifier 120 outputs an audio signal to speaker 30.
The display 130 is configured by an LCD or the like, and displays television image and navigation image information.
The GPS device 140 acquires the current position of the automobile using radio waves from satellites.

The traveling sensor 150 detects a traveling speed and a traveling distance of the automobile.
The direction sensor 160 detects the moving direction of the vehicle from the steering wheel angle or the like.
The travel sensor 150, the direction sensor 160, and the like are not limited to the configuration directly connected to the CPU 190, and may be connected to a certain device (vehicle information terminal device) or the like, such as a vehicle-mounted sensor previously mounted on a vehicle. A configuration in which they are indirectly connected may be employed.

The receiving unit 170 receives in real time a radio wave of a TV broadcast, a radio wave or a beacon of road traffic information such as traffic congestion in a vehicle information and communication system (VICS), a traffic accident, a construction, or a vacant parking lot. I do.
The HD 180 holds, in addition to the map information 181, a home position 182, a return time 183, a road selection preference 184, and the like input by the user using the remote control device 20.

  The CPU 190 includes a timer 191 for measuring time and time, a program for television reception, a normal program for an in-vehicle information device, a program for exclusive use when returning home from the in-vehicle information device, and multitask processing of these programs. A one-chip computer internally provided with a ROM (Read Only Memory) 192 in which an OS to be executed is stored in advance, a RAM (Random Access Memory) 193 for providing a work area for expanding the program when the program is executed, and the like. Then, by executing the program developed on the RAM 193, the respective units 110 to 180 are generally controlled to perform smooth television reproduction, route guidance, and the like.

FIG. 4 is a functional block diagram illustrating a system configuration of the in-vehicle information device 1 according to the first embodiment of the present invention.
As shown in FIG. 4, the in-vehicle information device 1 includes an input unit 101, a home position storage unit 102, a return time storage unit 103, a preference storage unit 104, a map data storage unit 105, and a current position acquisition unit 106. , A current time acquisition unit 107, a route search unit 108, a route search control unit 109, and a presentation unit 111.

The input unit 101 allows the user to input a home position of the user, a desired return time at which the user wants to return home from the place where he / she is away, and a route selection preference which is the user's preference in route selection. Specifically, the remote controller 20 and the communication interface 110 correspond to the input unit 101.
The home position storage unit 102 stores the home position input by the input unit 101. Specifically, the home position 182 of the HD 180 corresponds to the home position storage unit 102.

The return time storage unit 103 stores the desired return time input by the input unit 101. Specifically, the return time 183 of the HD 180 corresponds to the return time storage unit 103.
The preference accumulation unit 104 accumulates the route selection preference input by the input unit 101. Specifically, the road selection preference 184 of the HD 180 corresponds. Note that the preference accumulation unit 104 accumulates the preference selected by the user for each item of the route selection preference. For each item of the route selection preference, a choice of which option results in a shorter route is obtained. Whether it is performed is stored in advance. Since the information of the home position, the desired return time, and the route selection preference is once reused and reused the next time the user goes out using the vehicle, the information is stored in the HD 180 or the nonvolatile memory (SRAM, It is desirable that the information is stored in a flash memory or the like so that the user does not need to input each time he goes out.

The map data storage unit 105 holds map information to be provided to the route search unit 108 in advance. Specifically, the map information 181 of the HD 180 corresponds to the CD-ROM or DVD-ROM in which the electronic map information for navigation is stored, and the CD-ROM or DVD-ROM reader reads the map information. May be.
The current position acquisition unit 106 acquires the current position of the vehicle.

  Specifically, the GPS device 140 corresponds to the current position acquisition unit 106. In addition, in order to improve the accuracy of the position, the current position acquisition unit 106 includes a direction sensor 160 for measuring the azimuth of the vehicle and a travel sensor 150 for measuring the speed of the vehicle together with a signal from the GPS. Alternatively, a method of specifying the current position on the map using the vehicle movement information and the map information obtained from the map data storage unit 105 may be adopted.

The current time acquisition unit 107 acquires the current time using a sensor that can measure time such as a clock. Specifically, the timer 191 corresponds to the current time acquisition unit 107.
The route search unit 108 searches for a return-to-home route that matches the user's preference among the routes from the current location to the home position based on the route selection preferences stored in the preference storage unit 104, and uses this return-home route. Then, the time required to return home from the current location to the home position is calculated. Specifically, the CPU 190 corresponds to the route search unit 108.

  The route search control unit 109 uses (comparisons) the current time, the desired return time, and the required return time calculated by the route search unit 108 (can be changed depending on the route), so that the required return time is in time for the desired return time. It is determined whether or not. When it is determined that it is in time (current time + return-to-home time <= return-to-home time), it is the time when the user should start returning home from the required time calculated by the route search unit 108 and the return-to-home time. The departure time is calculated (departure time = desired return time-required return time). If it is determined that it is not in time (current time + return-to-home time> return-to-home time), the route search unit 108 is requested to change the route selection preference so that the required time is shortened and to search again. . Specifically, the CPU 190 corresponds to the route search control unit 109.

  The presentation unit 111 presents the user with the route to the home selected by the route search unit 108 and the departure time calculated by the route search control unit 109. Specifically, the display 130 and the speaker 30 correspond to the presentation unit 111.

Next, the operation of the in-vehicle information device of the first embodiment having the above configuration will be described.
It should be noted that the television reproduction and the normal navigation are not different from the conventional in-vehicle information device, so that the description of this processing is omitted, and the operation when returning to home, which is a feature of the present invention, will be described.

FIG. 5 is a flowchart showing the overall flow of the operation of the first embodiment.
First, the CPU 190 waits until a button for returning to home is pressed (S10). When the button to return to home is pressed (Yes in S10), CPU 190 determines whether or not a route search condition setting flag indicating whether or not the route search condition has already been set is set to "1" (S20). ). If the route search condition setting flag is not “1”, that is, if it is “0” (No in S20), a route condition setting process of setting a route search condition and setting “1” to the route search condition setting flag is performed. (S30). If the route search condition setting flag is "1" (Yes in S20), the CPU 190 executes a search / notification process for notifying the result of the route search, the departure time, and the like (S40).

FIG. 6 is a flowchart showing a subroutine of the route search condition setting process (S30) shown in FIG.
In the route search condition setting process, the CPU 190 waits for the input of the home position (S31). In the case of inputting the home position, for example, a home position setting screen shown in FIG. 7 is displayed. The home position setting screen is provided with four setting items of “set on a map”, “set by phone number”, “set by address”, and “set by coordinates”.

  By putting a check mark in any one of the check boxes 71 to 74 corresponding to each item, the user can input the home position coordinates in a desired manner. When the check box 71 is clicked, for example, the map information stored in the map data storage unit 105 and a cursor for designating a home position are displayed on the monitor screen, and the user looks at the displayed map. When the cursor is moved to the home position, the coordinates of the latitude and longitude of the home position are input based on the cursor position. When any one of the check boxes 72 to 74 is clicked, the telephone number, address, and latitude / longitude are entered in the text boxes 72a, 73a, 74a, 74b provided for the respective items, so that the position coordinates of the home position are entered. Is entered. When the position coordinates of the home position are input by any of such operations and the determination button 202 of the remote control device 20 is pressed (Yes in S31), the CPU 190 stores the position coordinates of the home position in the home position storage unit 102. Thus, the home position is set (S32).

  When the setting of the home position is completed, the CPU 190 waits for input of a desired return time (S33). In the case of inputting the desired return time, for example, a return time setting screen shown in FIG. 8 is displayed. A spin box 81 for inputting a return time is provided on the return time setting screen. The user operates the arrow of the spin box 81 and inputs a return time “21:30” which is a curfew, for example. When the return time is input by such an operation and the decision button 202 of the remote control device 20 is pressed (Yes in S33), the CPU 190 sets the return time by storing the return time in the return time storage unit 103 (S34). ). As a method for inputting the desired return time, a number and a cursor from “0” to “9” are displayed on the monitor screen, and “2” is set when “21:30” is to be set, for example. A method of sequentially selecting numbers corresponding to time, such as “1”, “3”, and “0”, may be adopted.

  When the return time setting is completed, the CPU 190 waits for the input of the route selection preference (S35). In the case of the input of the route selection preference, for example, a setting screen of the route search condition shown in FIG. 9 is displayed. The setting screen of the route search condition includes predetermined route search conditions (“Priority is given to toll roads”, “Priority is given to roads with few intersections”, “Priority is given to wide roads” ), And whether to include (“do”) or not (“do not”) each of the items 91 to 93 in the search condition is selected according to the user's preference. It is configured to be. In the illustrated example, the button 91b is clicked on the item 91 of "Use preferentially on toll roads", but "No" is clicked, whereas the item 92 of "Use preferentially on roads with few intersections" is clicked on the button 92a. In the item 93 of "Yes", "No" is selected by clicking the button 93b for the item 93 of "Use roads with wide roads with priority", and these are input as route selection preferences. When the route selection preference is input by such an operation and the determination button 202 of the remote control device 20 is pressed (Yes in S35), the CPU 190 sets the route selection preference by storing the route selection preference in the preference accumulation unit 104. (S36).

  When all the settings of the home position, the return time, and the route selection preference are completed, the CPU 190 sets the route search condition setting flag to “1” (S37), and returns to the main routine shown in FIG. I do.

  It should be noted that since such a route search condition setting process requires the user to perform various operations, it is desirable to perform the route search condition setting process before the start of driving in order to avoid an accident caused by looking aside.

  Here, this setting process only requires the user to input when the home position, desired return time, and route selection preference have not yet been set, and once set, the user does not need to perform the same operation again ( (Yes in S20), the search / notification process is performed with the contents already set.

  Therefore, regardless of where the user is going out without any troublesome operations such as inputting the home position, the desired return time, and the route selection preference every time, when the user leaves the destination and arrives at home by the return time, Information can be presented to the user.

FIG. 10 is a flowchart showing a subroutine of the search / notification process (S40) shown in FIG.
In this search / notification process, when the current position acquisition unit 106 acquires the current position of the vehicle while the vehicle is traveling (S401), the route search unit 108 determines that the current position is a certain distance from the home position. Waiting for the above separation (S402). This is because the user can return home immediately within a certain distance. Here, the distance for determining whether the user is away from the home position may be specified by the user. The reason is to cope with a case where the vehicle is parked in a garage away from home.

  If the vehicle is traveling a certain distance or more from the home position (Yes in S402), the route search unit 108 sets the degree of matching with the user's route selection preference (hereinafter, “preference matching degree”) k to 100 (hereinafter, “preference matching degree”). %) (S403), search for a route that matches the preference from the current location to the home position, and calculate the time required to reach home on the route (S404).

FIG. 11 is a flowchart showing a subroutine of step S404.
In this subroutine, the route search unit 108 first extracts a route candidate from the current position to the home based on the map information stored in the map data storage unit 105. When a plurality of candidates are extracted by the extraction (S4041), a route having a preference matching degree k or more that satisfies the route search condition is selected from the extracted plurality of route candidates (S4042). Next, the required time of the selected route candidate is calculated (S4043). A method of calculating the required time based on the map information stored in the map data storage unit 105 using information such as a traveling distance and an average speed is generally well known.

After calculating the required time, the CPU 190 adds the current time and the required time, and compares the addition result with the return time to determine whether or not the desired return time is in time (S405).
If it is in time (Yes in S405), a departure time for arriving at the home time or a margin time to be born when departing immediately is calculated (S406), and the route search result and either the calculated departure time or the margin time are calculated. Is presented (S407).

  If the route candidate selected under the set preference matching degree k is not enough to return home time (No in S405), the CPU 190 determines whether the preference matching degree k can be reduced for the time shortening element (S406). ). Here, the fact that the preference matching degree k can be reduced for the time reduction element means that the toll road is selected when the route selection preference input by the user has selected “No” for “Preferential use of toll road”. If you select "Yes" for "Use roads with less intersections first", select roads with more intersections or "Use roads with wider roads first" Means selecting a road with a narrow road width when "Yes" is selected. In other words, this means selecting a route that can be shortened in a direction that gradually departs from the user's preference.

  If it can be reduced, the CPU 190 decrements the preference matching degree k by “1” (S409). That is, for example, the toll road is selected when the route selection preference input by the user has selected “do not use” for “preferential use of toll road”. Then, a route that matches the preference is searched under the condition based on the preference matching degree k, and the time required to reach home on the route is calculated (S404). If it is still too late (No in S405), a route with many intersections or a narrow road (Yes in S408, S409) is repeated to select a route that is in time for returning home. Search.

That is, in order to set the conditions for the route search, it is necessary to first search the return route with the preference matching degree k = 100% and change the route selection preference of the user to perform the route search. It is determined whether there is a request from the route search control unit 109 to change the route selection preference (S405).
If it is not necessary to change the route selection preference (Yes in S405), that is, if the preference matching degree k = 100% as shown in FIG. 12, the preference accumulation unit 104 accumulates the information as the route search condition. The user's route preference is applied as it is.

  On the other hand, when it is necessary to change the route selection preference, for each item of the route selection preference stored in the preference accumulation unit 104, an item that can be reduced in the required time if the user preference is not applied is extracted, and the route of the user is extracted. A part of the selected preference changed so as to shorten the required time is applied as a route search condition (S409). Specifically, even when the user has set a route preference of “prefer a general road over a toll road”, generally, when a toll road is used and when it is not, a case where a toll road is used is used. Since the required time is shorter, it is conceivable to lower the value of the preference matching degree k by using a method of not applying the user's preference.

The route search control unit 109 determines whether or not the required time calculated in this way is in time for the desired time to return home (S405). For example, if the result obtained by subtracting the required time calculated from the desired return time stored in the return time storage unit 103 is equal to or later than the current time acquired by the current time acquisition unit 107, it can be determined that the desired return time is in time.
If it is determined in step S405 that it is in time, the route search control unit 109 calculates a time at which to depart from the current location (S407). The time to depart from the current location can be a time obtained by subtracting the required time calculated by the route search unit 108 from the desired return time stored in the return time storage unit 103. The actual required time may slightly increase or decrease from the required time calculated by the route search unit 108 depending on the traffic condition. Therefore, the departure time may be set earlier by a fixed rate.

  Therefore, when it is determined that the route search reflecting the user's route preference is not made in time for returning home, the ratio of reflecting the user's route preference can be automatically changed to perform the route search.

  Next, the presentation unit 111 presents to the user the route selected by the route search unit 108 and the departure time calculated by the route search control unit 109 (S407).

FIG. 13 shows an example of a case where the information is presented on the monitor screen.
In FIG. 13, the departure time “19:00” is presented in the character information 401, and the route 402 to the home is drawn on the map. Note that the route search is repeatedly performed even after the presentation unit 111 presents the departure time, and the user does not depart to his home when the current location of the vehicle changes or after the departure time presented by the presentation unit 111. In this case, the content presented by the presentation unit 111 is changed.

  On the other hand, if it is determined in step S405 that the route searched by the route search unit 108 is not in time for the desired home return time, the route search control unit 109 may shorten the required time by changing the items of the route selection preference. The route search unit 108 is inquired as to whether there is any (S408), and if there is a possibility that the required time can be shortened, the route search unit 108 is instructed to change the route selection preference and search again. In accordance with the instruction, the route search unit 108 changes the route selection preference so as to shorten the required time (S409), and performs the route search to the home again. Thereafter, the change of the route selection preference and the route search are repeated until a route that is in time for the desired home return time is searched, and the calculated route and the departure time are presented. At this time, it is desirable that the presented route and the departure time are presented to the user together with the fact that the route selection preference of the user is determined as a result of the change.

FIG. 14 illustrates a presentation example performed by the presentation unit 111 when the route selection preference of the user is changed.
In FIG. 14, a route that is not selected by applying the user's route preference of “use a general road with priority” is changed by changing the user's route preference so as to be in time for returning home. An example is shown. In this example, the character information 501 indicates the departure time “19:00” and also indicates that the route search preference has been changed. The route 502 to the home at this time is also shown.

  If the route search control unit 109 determines that the required time is not shortened even if the route selection preference is further changed, that is, if the preference matching degree k cannot be reduced, the presentation unit 111 sets the desired return home time to Presents to the user that it is not in time (S410).

FIG. 15 illustrates a presentation example performed by the presentation unit 111 when it is not possible to arrive in time for returning home.
In the example of FIG. 15, the character information 601 indicates that it is not possible to return home at the curfew return time “21:30”. At this time, a route 602 that can return home in the shortest time is also presented.

  As is clear from the above description, according to the in-vehicle information device 1 according to the first embodiment, the user can operate the return to home button 211 without having to perform any troublesome operation in a range that can meet the user's desired home return time. Automatically selects a route that reflects the user's preferences, and notifies the user at what time to leave, so that the user is able to maximize the user's It is possible to return home by the desired home return time using a route that suits the user's preference.

  In the first embodiment, the route to return to the home is searched for when the button 211 to return to the home is operated. However, the present invention is not limited to such a static case. Every time you move, when you stop at a traffic light at an intersection, when you get new VICS information such as traffic information, or when the route of a car deviates from the guidance route, a route that returns to your home at a dynamic timing (re- ) You may search. In this case, for example, when watching the television in the television reception mode, the message “Do you want to display the route?” And the three messages “Yes”, “No”, and “Do not display again” are displayed on the screen. A button may be displayed, and the user may click any button to display a route or the like to return to home when the “Yes” button is clicked. If the preference match k = 100 and it is late for returning home, a route to return to home or the like may be compulsorily displayed.

  Also, the in-vehicle information device 1 is provided with a hands-free function for linking with the mobile phone, and when the user leaves the car, the mobile phone takes over the application of the route guidance for returning to home. The departure time may be warned. In addition, when it is late for returning home, a message to that effect may be automatically sent from the mobile phone to the family by e-mail.

Furthermore, when the route search preference is changed and the preference (preference matching degree k) is changed and the route search is performed again, the preference related to the route selection stored in the preference storage unit 104 may be updated to the changed preference matching degree k. In this case, it is preferable that the update is not performed immediately but based on the past change history.
Further, in the first embodiment, the case where the driver of the vehicle used by the family is a specific person of the family has been described. Personally adapts to the return time and route selection preference of the user, automatically searches for a route that reflects the user's preference within the range of the desired return time desired by the user, and asks the user when to leave when going out You may make it notify.

  For example, when the vehicle is used by a plurality of members of the family (for example, a husband (Hiromi Izumo), a wife (Izumo rabbit), and a daughter (Izumo peach)), the time when each person returns home, The selection preference is set in advance in the return-to-home time table 183b shown in FIG. 16 and the road selection preference table 184b shown in FIG. 17, and when starting the car navigation system by running the engine, the driver setting screen shown in FIG. What is necessary is just to display on the display of the in-vehicle information device main body 10, and to specify a driver.

  In the example of the return-to-home time table 183b shown in FIG. 16, the husband Izumo Hiromi teaches his neighbor children at 23:00, and his wife Izumo rabbit teaches a nearby child in a piano classroom opened at home. Appropriate return times (Monday 14:00, Wednesday 16:00, Thursday 13:00, other days 18:00) are set for each day of the week. For the daughter Izumo peach, the curfew is 21:30.

  Further, in the example of the road selection preference table 184b shown in FIG. 17, "use preferentially toll roads?", "Use preferential use of roads with few intersections?", "Prioritize wide roads" For each item of "Do you use?", "Yes", "No", "No" for husband Izumo Hiromi, "No", "Yes", "Yes" for wife Izumo rabbit and daughter Izumo peach , Each set according to personality.

  Further, in the example of the driver setting screen shown in FIG. 18, the driver icons of the husband Hiromi, the wife rabbit, and the daughter peach are displayed together with the message "Set the driver of this vehicle. Touch the driver icon." Is displayed. Note that a touch panel is mounted on the surface of the display. When this driver icon (for example, wife rabbit) is touched, the wife rabbit's return time is read from the return time table 183b, and the wife rabbit's road selection preference is read from the road selection preference table 184b. As a result, the driver can change his / her home return time and / or his / her preference and change the way of selecting a route. Therefore, a route that reflects the user's preference is automatically searched within a range that is in time for the user's desired return home time that is personalized, and the user is notified of when to leave the place for each day of the week. be able to.

In this case, the driver was specified by explicit input by the user, but when the steering wheel was gripped, a fingerprint was taken, personal authentication was performed using the fingerprint, the driver was specified, the retinal image was acquired with the camera, and the retinal image was acquired. May be used for personal authentication to identify the driver.
If the return home location is different, the home position may be set for each user.

  Further, the in-vehicle information device 1 is provided with a hands-free function for linking with the mobile phone, and when the user leaves the car, the mobile phone takes over the application of the route guidance for returning to home. It is not limited to the case where the departure time is warned, and the mobile phone itself automatically obtains a route reflecting the user's preference within a range in time for the user carrying the mobile phone desired to return home, The user may be notified whether to leave.

  As described above, when the mobile phone obtains a route reflecting the user's preference within a range in time for the desired home return time desired by the user, the user walks, or takes a train, a bus, or a taxi. It is necessary to present the route including the taxi, the timetable of the train and the bus, and the fare of the train, the bus and the taxi according to the preference. However, since the memory capacity of a mobile phone is limited, it is often difficult to incorporate all of a map, a route map, a timetable, a toll table, and the like. Therefore, it is desirable that a map or the like be stored in an external server, and a system for guiding a user's course to be taken in cooperation with the mobile phone and the server be constructed.

(Embodiment 2)
FIG. 19 is a diagram illustrating an overall configuration when the information presentation device according to Embodiment 2 of the present invention is applied to the communication system 2.
This communication system 2 is intended to facilitate the user's return-to-home support by displaying the time-varying route to his / her home and the time at which he / she returns home, and is a wireless transmission path such as the Internet. A mobile phone 60 and a server 80 communicating with each other via a network 90.

  The mobile phone 60 is a communication device carried by a certain user (for example, my daughter's Izumo Momo), accessing a server as needed, and transmitting / receiving various information such as route information, a route map, and a map required for returning home. An antenna ex201 for transmitting and receiving radio waves to and from a base station, a camera unit ex203 including a CCD ex129, a flash, etc., capable of taking a still image, and a main body unit including a group of operation keys ex204. , A voice output unit ex208 for outputting music and call voice, a microphone and the like, a voice input unit ex205 for inputting voice, data such as a still image taken by a digital camera, etc. , A recording medium ex207 for holding the recording medium ex207, a slot part ex206 for mounting the recording medium ex207, and an LCD or the like. Comprising 3 still images or taken with, and route information received via the antenna ex 201, transit, and the like display unit ex202 for displaying a map and the like. Then, the mobile phone 60 returns the home route reflecting the user's preference from the current position to the home position, the required time of the home return route, and the departure time to depart from the current position required to return home by the return time. Is obtained in advance from the server 80, the obtained departure time is compared with the current time, and the departure time and the return home route are presented to the user before the departure time elapses.

  The server 80 holds a train, a bus route map, a train, a bus timetable, a train, a bus, a taxi fare table, and the like in addition to a map in advance, and stores the route information of the route information transmitted from the mobile phone 60. A return route reflecting the user's preference from the current position to the home position based on the transmission request, a required time of the return route, and a departure time to depart from the current position required to return home by the return time. It transmits the route information including the route information and the route map and the map based on the route map and the map transmission request transmitted from the mobile phone 60.

FIG. 20 is a block diagram showing a hardware configuration of mobile phone 60 shown in FIG. In addition, the same numbers are given to the portions corresponding to the components of the in-vehicle information device 1, and the description thereof is omitted. Here, only the components necessary for portable navigation are shown.
As shown in FIG. 20, the mobile phone 60 further includes a speaker 30, an amplifier 120, a display 130, a GPS device 140, a CPU 190, an operation unit 115, a transmission / reception unit 175, and a memory 180b.

The operation unit 115 includes the above-described operation keys ex204, and receives various operations by the user.
The transmission / reception unit 175 transmits a transmission request of route information including a home position, a return time, and a route selection preference, a transmission request of a route map and a map to the server 80, and receives the route information transmitted from the server 80. And receive route maps and maps.

  The memory 180b includes an SRAM, a flash RAM, and the like, and stores a home position 182, a home position 182, and a route selection preference 184b in a table format.

FIG. 21 is a diagram showing a configuration example of a table for storing the home position 182, the return time 183, and the route selection preference 184b.
As shown in FIG. 21, this table stores “Momoyamadai, Suita-shi ...” as the home position and “21:30” as the return time. This table also has, as route selection preferences, columns of “priority of train / bus / taxi / walk”, “priority to total fare?”, And “priority of walk route”. Then, as the priority order of the train, the bus, the taxi, and the walk, the priority order of the train, the bus, the taxi, and the walk is stored. Also, give priority to total charges? "Yes" is stored in the column of. Further, in the column for setting the priority of the walking route, the priority in the order of the shortest distance to avoid darkness is stored.

  Then, the CPU 190 creates a route information acquisition request including the home position 182, the return time 183, the road selection preference 184b stored in the table at a predetermined timing, and the current position acquired by the GPS device 140. The data is transmitted via the unit 175. When the route information transmitted from the server 80 is received, the departure time included in the route information is compared with the current time measured by the timer 191. Before the departure time elapses, the departure time and the return home route are compared. Are presented to the user via the display 130 and the speaker 30.

FIG. 22 is a block diagram showing a hardware configuration of server 80 shown in FIG.
As shown in FIG. 22, the server 80 includes a communication unit 81, map information, route map information such as trains and buses, timetable information such as trains and buses, and fare table information such as trains, buses and taxis. , A ROM 83 that previously stores a program for searching for a route, a RAM 84 that provides a work area when executing the program, a timer 85, and a CPU 86 that comprehensively controls these. When receiving the route information acquisition request from the mobile phone 60, the CPU 86 of the server 80 searches for various return routes from the current location of the mobile phone 60 to the home location using the information of the hardware disk 82, and searches for the current location. Route information including a return route reflecting the user's preference from the home position to the home position, a required time of the return route, and a departure time for departure from the current position required to return home by the return time. When the creation of the route information is completed, the CPU 86 transmits the route information to the mobile phone 60 via the communication unit 81.

  Note that the functional configurations of the mobile phone 60 and the server 80 are basically the same as the functional configurations of the in-vehicle information device 1 shown in FIG. 4, but the server 80 includes a map data storage unit 105, a route search unit 108, and a route. The difference is that it plays the role of the search control unit 109. Further, since the navigation is performed by the mobile phone, the preference of the route selection and the information prepared in the server 80 are different.

Next, a communication sequence of a route acquisition / notification process performed between the mobile phone 60 and the server 80 will be described.
FIG. 23 is a diagram showing a communication sequence of a route acquisition / notification process performed between the mobile phone 60 and the server 80.
The CPU 190 of the mobile phone 60 determines whether it is time to acquire the route information (S51). As the timing of the route information acquisition, for example, other than when the operation unit 115 is operated by the user, “every predetermined time”, “every fixed distance”, and “when the user's route deviates from the guidance route” There is a timing when there is at least one dynamic some trigger of ". In addition, when a traffic restriction occurs, a detour may be automatically searched, and a detour may be searched to change the route.

If it is the timing of the acquisition, the CPU 190 acquires the current position by the GPS device 140 (S52), and requests the route information including the acquired current position, the home position, the return time, and the route selection preference stored in the memory 180b in advance. Is generated, and the generated route information request is transmitted to the server 80 (S53).
Upon receiving the route information request, the CPU 86 of the server 80 stores the hardware disk 82 on the basis of the current position of the mobile phone 60 included in the route information request, the home position, the return time, and the route selection preference of the user. With reference to the route information, the route information is created (S54).

  The creation of this route information is performed, for example, as follows. For example, when Izumo Momo is drinking at a certain “Tikutaku Tei” in Nishinakajima, the CPU 86 of the server 80 determines the current position “Tiktaku Tei” based on the map and route map stored in the hardware disk 82. Search for the nearest station. Then, the subway “Nishinakajima Minamikata” and the Hankyu “Minamikata”, which are departure stations at substantially equal distances, are acquired. In addition, the CPU 86 searches for a subway station and Hankyu station that arrives near the home position. Then, get the subway "Momoyamadai" and Hankyu "Minamisenri". Further, the CPU 86 calculates the time required for walking from the distance from the current position to the departure station and the distance from the arrival station to the home position. Further, the CPU 86 obtains the departure times of the subway “Nishinakajima Minamikata” and Hankyu “Minamikata” and the arrival times of the subway “Momoyamadai” and Hankyu “Minamisenri” from the timetable, and calculates the required time. I do. Then, the CPU 86 calculates the departure time of departure from the current position "Chikutaku-tei" by calculating backward from the return time, and from the fare table, the fee "340 yen" from the subway "Nishinakajima south" to "Momoyamadai", Acquire the fee "180 yen" from "South" to "Minami Senri". For a taxi, the required time of the route is obtained from the distance, and the fare is obtained from the fare table. Further, the CPU 86 extracts a return route that is in time for returning home, refers to the preferences, selects a plurality of candidates from the extracted return routes in an order that matches the preferences, and lists the candidates and details of each candidate. Create route information including a certain departure time, fare, etc. Then, the CPU 86 transmits the created route information to the mobile phone 60 (S55).

  Upon receiving the route information, the CPU 190 of the mobile phone 60 waits for the departure time threshold to arrive (S56), and presents a list of candidates and route information when the departure time threshold arrives (S57). Here, the departure time threshold is set 15 minutes before the departure time of the current position that does not match the preference among the candidates. However, another time such as 10 minutes before may be set. May be set before the departure time that best matches the taste arrives.

FIG. 24 is a diagram showing a candidate selection screen displayed on the display 130 of the mobile phone 60 and details of each candidate. In particular, FIG. 24A shows a candidate selection screen, and FIGS. 24B to 24F show detailed display screens of each candidate.
In the example shown in FIG. 24A, the current position departure times and the fares of the candidates 1 to 5 are displayed in a list. When either one of the candidates 1 and 2 is selected, a route that matches the taste, such as the current location departure time when using the subway, the time required for the return route, the return time, and the fare, is displayed (FIG. 24 (b) ), (C)). When any one of the candidates 3, 4 and 5 is selected, a route whose preference is changed, such as the departure time at the current location, the time required for the return route, the return time, the fare, etc., when Hankyu is used is displayed (FIG. 24). (D)-(f)). Here, there are cases where a taxi is used from Minami-Senri to home, and there are cases where it is on foot.Since the route from Minami-Senri to home is dark, the route is adjusted according to your preference so as to avoid darkness than the total fee Is a search.

  This allows the user to know beforehand by what time the user must depart from the current position, various return routes, fares, and return times.

  When any of the detail screens is selected, the CPU 190 of the mobile phone 60 determines whether a route map has been requested (S58). When the route map is requested, the CPU 190 requests the server 80 to transmit the route map (S59).

When the route map is requested, the CPU 86 of the server 80 creates a route map including the current position and the home position of the mobile phone 60 (S60), and transmits the created route map to the mobile phone 60 (S61).
Upon receiving the route map, the CPU 190 of the mobile phone 60 displays the received route map on the display 130 (S62). FIG. 25 is a diagram illustrating an example of a route map. In the example shown in FIG. 25, a route map including the current position to the home position and a message "Please select the nearest station name" are displayed.

When the route map is displayed, CPU 190 of mobile phone 60 determines whether a map of the nearest station has been requested (S63). When a map is requested, the CPU 190 requests the server 80 for a map including the current position and the nearest station (S64).
When a map is requested, the CPU 86 of the server 80 creates a map including the current position of the mobile phone 60 and the nearest station (S65), and transmits the created map to the mobile phone 60 (S66).

Upon receiving the map, the CPU 190 of the mobile phone 60 displays the received map (S67). Then, the mobile phone 60 performs navigation on the walking route (S68).
FIG. 26 is a diagram illustrating an example of a map. In the example shown in FIG. 26, a map including the subway “Nishinakajima south” from the current position and a walking route are displayed.
As a result, even if it is not known to the south of Nishinakajima, it is possible to know the course and where to go from the current position to the subway "Nishinakajima south".

In the second embodiment, the candidates are presented centering on trains. However, when the trains depart, by what time the bus departs, by what time the taxi departs, or by walking. The route information may be guided or presented by any time, such as departure.
In addition, whether or not to use a women-only vehicle in the case of a train may be added as a preference.

  In the second embodiment, the mobile phone 60 requests the route information including the current position, the home position, the return time, and the preference, and acquires the route information. Or the route information including only the current position, the home position, and the return time may be requested, and the route may be searched based on the route map, map, timetable, and fare table sent from the server 80.

  Further, a map, a route map, a timetable, and a fare table only around the user's home are stored in the recording medium ex207, and the mobile phone 60 can access the map stored in the recording medium ex207 without accessing the server 80. A route search may be performed using a route map, a timetable, or a fare table.

  The information presentation device according to the present invention can be used for a computer device such as a car navigation system or a mobile phone, and presents a user with a time to depart from the current position or presents a return route to the user. Suitable for support.

FIG. 1 is a diagram illustrating an overall configuration when an information presentation device according to Embodiment 1 of the present invention is applied to an in-vehicle information device. FIG. 2 is a diagram illustrating a configuration example of operation buttons provided on the remote control device 20 illustrated in FIG. 1. FIG. 2 is a block diagram illustrating a hardware configuration of the in-vehicle information device main body 10 illustrated in FIG. 1. FIG. 2 is a functional block diagram illustrating a system configuration of the on-vehicle information device 1 according to the first embodiment of the present invention. 4 is a flowchart illustrating an overall flow of an operation of the on-vehicle information device. It is a flowchart which shows the subroutine of the route search condition setting process (S30) shown in FIG. It is a figure showing the example of composition of a setting screen of a home position. It is a figure showing the example of composition of the setting screen of return time. It is a figure showing the example of composition of the setting screen of a route search condition. It is a flowchart which shows the subroutine of the search and alerting | reporting process (S40) shown in FIG. It is a flowchart which shows the subroutine of step S404 shown in FIG. It is a figure which shows the relationship between the preference matching degree k and the delay time with respect to the return time at the time of setting k = 100%. It is a figure showing the example of a display of search information in preference matching degree k = 100%. FIG. 14 is a diagram illustrating a display example of search information when a preference matching degree k is lowered. It is a figure which shows the example of a display of the search information when it is not in time for returning home. It is a figure showing the example of composition of a return-to-home time table. It is a figure showing the example of composition of a road selection preference table. FIG. 4 is a diagram illustrating a configuration example of a driver setting screen. FIG. 9 is a diagram illustrating an overall configuration when an information presentation device according to Embodiment 2 of the present invention is applied to a communication system 2. FIG. 20 is a block diagram illustrating a hardware configuration of the mobile phone 60 illustrated in FIG. 19. It is a figure showing the example of composition of the table which stores a home position, desired return time, and route selection preference. FIG. 20 is a block diagram illustrating a hardware configuration of a server 80 illustrated in FIG. 19. FIG. 9 is a diagram showing a communication sequence of a route search / notification process performed between the mobile phone 60 and the server 80. FIG. 9 is a diagram showing a candidate selection screen displayed on a display device 130 of the mobile phone 60 and details of each candidate. In particular, FIG. 24A shows a candidate selection screen, and FIGS. 24B to 24F show detailed display screens of each candidate. It is a figure which shows the example of a route map. It is a figure showing the example of a map.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 In-vehicle information device 2 Communication system 60 Mobile telephone 80 Server 90 Network 101 Input unit 102 Home position storage unit 103 Return time storage unit 104 Preference storage unit 105 Map data storage unit 106 Current position acquisition unit 107 Current time acquisition unit 108 Route search unit 109 route search control unit 111 presentation unit

Claims (21)

An information presentation device that obtains a route to be followed by a user and presents information including the obtained route to the user,
Home position holding means for holding the user's home position in advance;
Return time holding means for holding the user's return time in advance;
Current position acquisition means for acquiring the current position of the user;
Current time acquisition means for acquiring the current time;
Acquisition means for acquiring a return route from the current position to the home position, a required time of the return route, and a departure time to depart from the current position required to return home by the return time. ,
Presenting means for comparing the departure time acquired by the acquiring means with the current time, and presenting the departure time acquired by the acquiring means and the return route to the user before the departure time elapses. An information presentation device that is a feature. The information presentation device further includes a preference accumulation unit that accumulates a user's preference related to route selection in advance,
The information presentation device according to claim 1, wherein the obtaining unit obtains a home return route in consideration of a preference related to a route selection stored in the preference storage unit. The information presentation device,
Installed in the vehicle driven by the user,
Furthermore, a map data holding means for holding map data is provided,
The acquisition means acquires the return route, the required time of the return route, and the departure time based on the map data,
The information presenting device according to claim 2, wherein the presenting means presents the route of the vehicle on the return route on a map. The information presentation device further includes an operation unit operated by a user,
The information presentation device according to claim 3, wherein the acquisition unit searches the return route when the operation unit is operated. The acquisition means may include “every predetermined time”, “every fixed distance”, “when stopped at an intersection signal”, “when new VICS information such as traffic information is acquired”, and “ The information presentation device according to claim 3, wherein the home return route is searched at at least one dynamic timing when the route deviates from the guide route. The preferences regarding the route selection accumulated by the preference accumulation means include “priority of toll roads or general roads”, “whether to give priority to wide roads” and “priority to roads with a small number of intersections”. The information presentation device according to claim 3, wherein the information presentation device is at least one of the following. The information presenting device further includes a control unit that controls a degree of considering a preference regarding home return route selection used by the acquisition unit,
The control unit, the current time, the return time, and the required time of the return route acquired by the acquisition unit is compared, to determine whether the return route obtained by the acquisition unit in time to return home,
4. The information presenting apparatus according to claim 3, wherein when it is determined that it is not in time, the acquisition unit is requested to perform a route search again with a changed preference for the route selection so as to shorten the required time. . When the control unit issues a request for changing the route selection preference and re-searching the route to the acquisition unit, the presenting unit presents to the user that the preference related to the route selection set by the user has been changed. The information presentation device according to claim 7, wherein: When the control unit issues a request for changing the preference related to the route selection to the acquisition unit and searching for a route again, the control unit updates the preference related to the route selection stored in the preference storage unit to the changed preference. The information presentation device according to claim 7, wherein The information presenting device further includes a user designation unit for designating a user who drives the vehicle from among the plurality of users,
The return time holding means holds a return time for each user in advance,
The preference accumulating means accumulates in advance preferences relating to route selection for each user,
The information presentation device according to claim 3, wherein the acquisition unit acquires a home return route in consideration of a user's preference regarding route selection designated by the user designation unit. The information presentation device further includes a user authentication unit for authenticating a user who drives the vehicle from among the plurality of users,
The return time holding means holds a return time for each user in advance,
The preference accumulating means accumulates in advance preferences relating to route selection for each user,
The information presentation apparatus according to claim 3, wherein the acquisition unit acquires a home return route in consideration of a preference of the user authenticated by the user authentication unit regarding a route selection. The information presentation device is carried by a user,
The information presentation device according to claim 2, wherein the acquisition unit acquires the return route, a required time of the return route, and the departure time from outside. The information presentation device further includes an operation unit operated by a user,
13. The information presentation according to claim 12, wherein the acquisition unit acquires the return route, the required time of the return route, and the departure time from outside when the operation unit is operated. apparatus. The acquisition means may include the return route at at least one dynamic timing of “every predetermined time”, “every fixed distance”, and “when the user's route deviates from the guidance route”. The information presentation device according to claim 12, wherein the required time and the departure time are acquired from outside. The preferences regarding the route selection accumulated by the preference accumulating means include “priority of train, bus, taxi and walking”, “whether or not to give priority to total fare” and “priority of walking route regarding avoiding darkness and shortest distance”. The information presentation device according to claim 12, wherein the information presentation device is at least one of the following. The information presenting device further includes a control unit that controls a degree of considering a preference regarding home return route selection used by the acquisition unit,
The control unit, the current time, the return time, and the required time of the return route acquired by the acquisition unit is compared, to determine whether the return route obtained by the acquisition unit in time to return home,
13. The information presenting apparatus according to claim 12, wherein when it is determined that it is not in time, the acquisition unit is requested to acquire a route again with a change in the preference regarding the route selection so as to shorten the required time. . When the control unit issues a request for changing the route selection preference and re-searching the route to the acquisition unit, the presenting unit presents to the user that the preference related to the route selection set by the user has been changed. 17. The information presentation device according to claim 16, wherein: When the control unit issues a request for changing the preference related to the route selection to the acquisition unit and searching for a route again, the control unit updates the preference related to the route selection stored in the preference storage unit to the changed preference. 17. The information presentation device according to claim 16, wherein: The information presentation device further includes an operation unit operated by a user,
The acquisition unit acquires map data including the return route from outside when the operation of the operation unit is performed,
The information presenting device according to claim 12, wherein the presenting means presents a user's route on a return route on a map. An information presentation method in an information presentation device that acquires a route to be followed by a user and presents information including the obtained route to a user,
The information presentation device,
Home position holding means for holding the user's home position in advance;
Return time holding means for holding the user's return time in advance,
The information presentation method includes:
A current position obtaining step of obtaining a current position of the user;
A current time acquisition step for acquiring the current time;
An acquisition step of acquiring a return route from the current position to the home position, a required time of the return route, and a departure time to depart from the current position required to return home by the return time. ,
Comparing the departure time acquired in the acquisition step with the current time, and presenting the departure time acquired in the acquisition step and the return home route to the user before the departure time elapses. Characteristic information presentation method. A program for an information presentation method in an information presentation device that acquires a route to be followed by a user and presents information including the obtained route to a user,
The information presentation device,
Home position holding means for holding the user's home position in advance;
Return time holding means for holding the user's return time in advance,
A current position acquisition step of acquiring a current position of the user included in the information presentation method;
A current time acquisition step for acquiring the current time;
An acquisition step of acquiring a return route from the current position to the home position, a required time of the return route, and a departure time to depart from the current position required to return home by the return time. ,
The departure time acquired in the acquiring step is compared with the current time, and before the departure time elapses, a departure time acquired in the acquiring step and a presentation step of presenting the return route to the user are executed on the computer. A program characterized by causing

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