JP2004126035A - Updated map data display method and onboard terminal equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide onboard terminal equipment for turning the updated contents of updated map data to different display forms corresponding to a representative fraction. <P>SOLUTION: When displaying data for updated condition display transmitted from a distribution center 200 on the display monitor 119 of onboard equipment 100, if the representative fraction is small, the icon 50 of an asterisk is displayed at a prescribed position corresponding to an updated mesh. When the reduction scale ratio is increased, the icon 50 disappears and the updated mesh and an already received and updated mesh are displayed by changing background colors. When the reduction scale ratio is increased further, the updated contents are displayed concretely. For instance, a newly constructed road 61 and newly constructed facilities are displayed by the icon 62. Further, it is detected that a vehicle is stopping and updated information contents can be displayed in a list by characters. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an updated map display for displaying updated contents of updated map data on an in-vehicle terminal device.
[0002]
[Prior art]
As an in-vehicle terminal device that receives map data updated by communication, one described in Patent Literature 1 is known. In the device of Patent Document 1, the navigation device that has received the updated map data highlights the updated map on the screen. For example, the color, line width, and line type are changed and displayed, blinking is displayed, and character strings are displayed.
[0003]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2002-188926
[Problems to be solved by the invention]
In the related art of Patent Literature 1, although it is described that the updated map data received by the navigation device is highlighted, the map scale is not considered. Since the map data used in the navigation device has a hierarchical structure with different map scales, for example, the display of update data on a display screen of the entire Kanto region with a small scale and the vicinity of Ginza with a large scale are large. If the display of update data on the display screen is uniform, it will be difficult to see,
[0005]
The present invention provides an in-vehicle terminal device in which the update content of the update map data is displayed differently according to the scale.
[0006]
[Means for Solving the Problems]
(1) In the updated map data display method according to the first aspect of the present invention, when the updated map data distributed in a predetermined mesh unit is displayed together with the map data before updating, whether or not the contents of the map data are updated and the contents are reduced. It is characterized in that the display mode is changed according to the rate.
(2) In this updated map data display method, when displaying the updated map at the first scale, an icon is displayed at a predetermined position in the area being updated, and the second map is displayed at a predetermined position. When the updated map is displayed at the scale of 2, the entire area that is being updated may be displayed in a different display form from the other areas that are not updated.
(3) In this case, when displaying the updated map at the third scale, which is larger than the second scale, it is preferable to display an icon at a predetermined position in the updated area. Further, when the updated facility data is displayed as the facility icon on the map display screen of the third reduced scale, information on the updated facility icon can be displayed in characters. Further, when the vehicle is stopped, the updated contents of the updated map data may be displayed as character data.
(4) The vehicle-mounted terminal device according to claim 6, wherein the pre-update map data storage means for storing map data for each scale factor, the update map data storage means for storing distributed update map data, and the update map Display means for displaying an updated map by a data display method.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
--- First Embodiment ---
1 to 19, a first embodiment in which an in-vehicle terminal device according to the present invention is applied to a car navigation device will be described. FIG. 1 shows a car navigation device (hereinafter, referred to as an in-vehicle device 100) of the first embodiment, a distribution center 200 that distributes map information and route search information to the in-vehicle device 100, an in-vehicle device 100 and a distribution center 200. A mobile phone 150 and a mobile communication network 250 for transmitting and receiving various data to and from the mobile phone 150 are shown. As shown in FIG. 1, the mobile phone 150 is connected to the vehicle-mounted device 100. The in-vehicle device 100 has a function of presenting information about the traveling of the vehicle, specifically, a function of displaying a road map around the vehicle position, a function of calculating a recommended route from a departure place to a destination, and a calculated recommended route. It also has a function of performing route guidance based on the information. This is a device that performs so-called navigation or road guidance. Further, as will be described later, the in-vehicle device 100 can request the latest map information or the like of the distribution center 200 from the mobile phone 150 to the distribution center 200 via the mobile communication network 250. The latest map information and the like transmitted from the distribution center 200 via the mobile communication network 250 can be received by the mobile phone 150. Note that, instead of the mobile phone 150, a vehicle-mounted telephone, a communication LAN, or a communication device dedicated to a vehicle-mounted device may be used.
[0008]
FIG. 2 is a system block diagram showing the configuration of the vehicle-mounted device 100. In FIG. 2, reference numeral 111 denotes a current position detecting device for detecting the current position of the vehicle, for example, a direction sensor 111a for detecting the traveling direction of the vehicle, a vehicle speed sensor 111b for detecting the vehicle speed, and a GPS sensor 111c for detecting a GPS signal from a GPS satellite. And a gyro sensor 111d for detecting a change in the traveling direction of the vehicle. A map storage unit 112 stores a nonvolatile semiconductor memory as a storage memory for storing the latest map information (also referred to as updated map data) received by the mobile phone 150 and the like, and stores road map data and address data before updating. DVD-ROM 113, which is a recorded recording medium, and its reading device. The storage memory is not limited to a nonvolatile semiconductor memory, but may be a recordable storage device such as a hard disk. The recording medium is not limited to a DVD-ROM, but may be a magnetic tape, a CD-ROM, or any other recording medium. Hereinafter, the road map data, the address data, the map information, and the like stored in the map storage unit 112 are collectively referred to as “map information (of the vehicle-mounted device 100)”. When the map is updated, the map information of the in-vehicle device 100 includes the map information before and after the update. Therefore, as described later, an updated map management table for managing the update status of the map information is provided. A control circuit 114 controls the entire apparatus, and includes a microprocessor and its peripheral circuits. The control circuit 114 executes a control program stored in the ROM 116 using the RAM 115 as a work area to perform various controls described later.
[0009]
An input device 117 includes switches for inputting the destination of the vehicle or the like or inputting various operations. Reference numeral 118 denotes an image memory for storing image data to be displayed on the display monitor 119. This image data is created from road map drawing data, various graphic data, and the like. The image data stored in the image memory 118 is read out as appropriate and displayed on the display monitor 119. The display monitor 119 displays the route information and the guidance information together with the road map. In this embodiment, the display screen of the display monitor 119 has a function as a touch panel switch.
[0010]
As will be described later, information received by the mobile phone 150 connected to the on-vehicle device 100 is temporarily stored in the RAM 115 and then stored in the image memory 118 as appropriate for display on the display monitor 119. The latest map information received from the distribution center 200 is temporarily stored in the RAM 115 and then stored in the storage memory of the map storage unit 112 as updated map data.
[0011]
The car navigation device (in-vehicle device) 100 configured as described above performs various types of navigation based on the vehicle position information acquired by the current position detection device 111 and the map information stored in the map storage unit 112. For example, a road map near the vehicle position and the vehicle position are displayed on the display monitor 119, and the driver is guided along the route obtained by the route search. Also, as described later, an inquiry about the latest map information is made to the distribution center 200, and if there is map information newer than the map information of the vehicle-mounted device 100, the latest map information can be received from the distribution center 200. .
[0012]
In the distribution center 200 of FIG. 1, reference numeral 201 denotes a request receiving server, which receives a vehicle position information and a Car ID (vehicle identification number) for specifying a vehicle from the on-vehicle device 100 and a map distribution request and executes the request. Reference numeral 202 denotes a map / POI server which stores a detailed road map of the whole country and POI information (information of sightseeing spots and various facilities of Point of Interest). Detailed road maps and POI information nationwide stored in the map / POI server 202 correspond to a map mesh together with version information according to the newness of each information, from past information to the latest information. Is stored. The map / POI server 202 outputs data to the request reception server 201 in response to a request from the request reception server 201.
[0013]
A request processing server 203 performs various calculations based on map information stored in the map / POI server 202 in response to a request from the request reception server 201, and outputs a calculation result to the request reception server 201. The calculation executed by the request processing server 203 is for comparing the map information of the vehicle-mounted device 100 with the latest map information stored in the map / POI server 202 and transmitting the latest map information to the vehicle-mounted device 100. Such as data processing. This will be described later.
[0014]
Reference numeral 204 denotes a customer DB server. The calculation result regarding the latest map information requested by the in-vehicle device 100 is temporarily stored in the customer DB server 204 for each in-vehicle device 100, and then distributed to the in-vehicle device 100 through the request reception server 201. The in-vehicle device 100 is provided with a Car ID for identifying the vehicle in advance, and the customer DB server 204 updates the map information of the in-vehicle device 100 with the version information and the mesh unit in the storage area assigned to the Car ID. Various types of information such as version information of map information are stored (see FIGS. 18 and 21).
[0015]
According to the above-described configuration, when the in-vehicle device 100 transmits an inquiry about the latest map information together with information such as the Car ID to the distribution center 200, the distribution center 200 determines the latest map information based on the information received from the in-vehicle device 100. An operation is performed. Then, as a result of the calculation in the distribution center 200, the presence / absence of map information newer than the map information of the vehicle-mounted device 100 (also referred to as the necessity of updating the map) is transmitted from the distribution center 200 to the vehicle-mounted device 100. The in-vehicle device 100 presents the calculation result of the distribution center 200 to the driver and confirms whether or not to receive new map information. The necessity / unnecessity of the new map information (updated map information) selected by the driver is transmitted to the distribution center 200. The distribution center 200 transmits the latest map information to the vehicle-mounted device 100 when a request for distribution of new map information is received from the vehicle-mounted device 100. Thereafter, the in-vehicle device can guide the route of the vehicle based on the received latest map information. Hereinafter, the processing executed by the on-vehicle device 100 and the distribution center 200 will be described in detail.
[0016]
――― Operation of onboard unit 100 ―――
The operation of the vehicle-mounted device 100 will be described with reference to FIGS. FIG. 3 is a flowchart showing a process of a main routine of a program executed in the vehicle-mounted device 100. When the accessory is turned ON (ACC ON) by the ignition key, the power of the vehicle-mounted device 100 is turned on, and a program for performing the processing shown in FIG. 3 is started. The program in FIG. 3 is executed by the control circuit 114. In step S10, a subroutine for performing processing for displaying the current position of the vehicle on the display monitor 119 is executed. This subroutine will be described later. After executing the subroutine of step S10, the process proceeds to step S15, and it is determined whether or not an instruction to perform a route search has been given by the driver.
[0017]
If a negative determination is made in step S15, the process proceeds to step S30, and a subroutine for performing a process for displaying the current position of the vehicle, which is changed by the movement of the vehicle, on the display monitor 119 is executed. This subroutine will be described later. If the determination in step S15 is affirmative, the process proceeds to step S20, where a subroutine for performing a route search calculation for guiding the vehicle is executed. This subroutine will be described later.
[0018]
After the execution of the subroutine of step S30, the process proceeds to step S40, where a subroutine for performing processing for determining whether or not to inquire of the distribution center 200 about the latest map information is executed. This subroutine will be described later. After the execution of the subroutine of step S40, the process returns to step S10, and the above operation is repeated.
[0019]
Through the above-described processing, the on-vehicle device 100 superimposes the current position of the vehicle on the map information, displays the current position on the display monitor 119, and performs guidance processing based on the result of the route search.
[0020]
FIG. 4 is a flowchart showing a subroutine of step S20 in FIG. In this subroutine, the in-vehicle device 100 performs a route search on the distribution center 200 using both the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information of the distribution center 200. Request. If the result of this calculation is different, the distribution center 200 notifies the in-vehicle device 100 of the fact, that is, the fact that the latest map is present and needs to be updated. This allows the driver to determine whether to request new map information from the distribution center for the mesh used in the route search calculation. The details will be described below.
[0021]
In step S201, the process stands by until input device 117 of vehicle-mounted device 100 inputs information necessary for route search, such as a waypoint and a search condition. The departure point is the current position of the vehicle, and is detected by the current position detection device 111. If it is determined in step S201 that necessary information has been input, the process proceeds to step S203, and a route search mode selection screen is displayed on the display monitor 119 as shown in FIG. Reference numeral 1 denotes a current position mark of the vehicle (own vehicle position mark). As shown in FIG. 5, a search button 5 and a server search button 6 are displayed below the display monitor 119. The search button 5 is a button (switch) for the driver to instruct a route search based on the map information of the vehicle-mounted device 100. The server search button 6 corresponds to the map information stored in the vehicle-mounted device 100 in the distribution center 200. This is a button for instructing a route search using both the map information to be searched and the latest map information. As described later, this button is used to confirm whether or not the map information of the vehicle-mounted device 100 is out of date. The screen displayed in this step S203 can display only the server search button 6 as shown in FIG. 6, or can display only the search button 5 as shown in FIG. Any one of the display screens in FIGS. 5 to 7 is determined by setting the mode of the vehicle-mounted device 100 in advance.
[0022]
In step S205, it is determined whether or not the route search is performed by the vehicle-mounted device. That is, it is determined whether the search button 5 has been pressed. If an affirmative determination is made in step S205, the process proceeds to step S233, where a route search is performed based on the map information of the vehicle-mounted device 100, and the process returns to the main routine. If a negative determination is made in step S205, the process proceeds to step S207, and it is determined whether the server search button 6 has been pressed. If step S207 is affirmed, the process proceeds to step S209, and if step S207 is negative, the process returns to step S205. In step S209, the route search condition input in step S201 is transmitted from the mobile phone 150 to the distribution center 200 together with the current position of the vehicle and the Car ID, and the process proceeds to step S211. As will be described later, when the distribution center 200 receives the information transmitted in step S209, the map version of the vehicle-mounted device 100 is specified based on the received Car ID. The map version may be a mesh unit or a data type unit in the mesh. As the data type, road data representing the road shape including the position coordinates of the road, node / link connection data representing the connection state of the road, or background data or guidance data is used. Then, a route search is performed using both the map information corresponding to the map information stored in the vehicle-mounted device 100 and the latest map information, and the presence or absence of a difference in the search result is transmitted to the vehicle-mounted device 100. The search result includes recommended route data and guidance data. The vehicle-mounted device 100 waits in step S211 until receiving this result.
[0023]
If an affirmative determination is made in step S211, it is determined in step S213 whether or not there is a difference in the search results received in step S211 (whether the search results do not match). If there is no difference in the search results received in step S211, that is, if both match, it proceeds to step S231, and there is no updated map in the distribution center 200 (server) as shown in FIG. The driver is notified by displaying a message to that effect, and the process proceeds to step S233. If it is determined in step S213 that there is a difference between the search results received in step S211, the process proceeds to step S215, and a Yes button 7 and a No button 8 are displayed below the display monitor 119 as shown in FIG. 9. . These buttons 7 and 8 are touch panel switches for allowing the driver to select whether or not to update the map since the distribution center 200 has an updated map.
[0024]
In step S217, it is determined whether an instruction to update the map information has been given. That is, it is determined which of the Yes button 7 and the No button 8 has been pressed. If a negative determination is made in step S217, that is, if it is determined that the No button 8 has been pressed, the process proceeds to step S233. If step S217 makes a positive determination, that is, if it is determined that the Yes button 7 has been pressed, the operation proceeds to step S219. In step S219, the distribution center 200 requests the distribution center 200 to transmit the latest map information with respect to a plurality of meshes used in the route search calculation, for example, a plurality of meshes through which a recommended route from the starting point to the destination passes. I do. The latest map information may be similarly requested for a mesh that has been used in the calculation process but does not pass through the recommended route. In step S221, the process waits until the latest map information requested in step S219 is received. If it is determined in step S221 that the latest map information has been received, the process proceeds to step S223, and the latest map information received in step S221 is stored in the semiconductor storage memory of the map storage unit 112 for the plurality of meshes. If the map information of the corresponding mesh already exists in the storage memory, it is overwritten with the latest map information. If the map information of the corresponding mesh does not exist in the storage memory, the map information is newly stored. Although detailed description is omitted, when map information received from the distribution center 200 exists in the storage memory, old map information is not read from the DVD-ROM 113 for the mesh stored in the storage memory. Therefore, an updated map management table is provided in the map storage unit 112. The updated map management table has a structure that can specify, for example, the latest mesh or the latest data in the mesh. In step S225, as shown in FIG. 10, a message indicating that the map information has been updated is displayed on the display monitor 119, a route search is performed based on the updated map information, and the process returns to the main routine.
[0025]
FIG. 11 is a flowchart showing a subroutine of step S30 in FIG. In this subroutine, the current position of the vehicle, which changes as the vehicle travels, is superimposed on the map information and displayed on the display monitor 119, and guidance processing is performed based on the result of the route search calculation. In step S301, the current position of the vehicle is detected by the current position detection device 111, and the process proceeds to step S303. In step S303, the map information stored in the map storage unit 112 is read into the RAM 115, and the process proceeds to step S305. That is, a predetermined number of meshes around the current location are specified, and the latest map data is developed in the RAM 115 using the above-described updated map management table. Then, a road map is displayed on the display monitor 119. In step S305, map matching processing for displaying the current position of the vehicle detected in step S301 on a road included in the map information read in step S303 is performed. This subroutine will be described later. In step S307, the current position of the vehicle corrected by performing the processing of the subroutine in step S305 is superimposed on the map information read in step S303, displayed on the display monitor 119, and the process proceeds to step S309.
[0026]
In step S309, it is determined whether there is a result of the route search calculation executed in step S20 of the main routine. That is, it is determined whether or not the route is being guided. When step S309 is affirmatively determined, the process proceeds to step S311 to determine whether or not the vehicle is approaching the guidance point. When step S311 is affirmatively determined, the process proceeds to step S313, and based on the result of the route search calculation executed in step S20 of the main routine, guidance processing, that is, display or voice guidance for guidance is performed, and the process proceeds to step S315. Further, even if a negative determination is made in step S309 or step S311, the process proceeds to step S315. In step S315, it is determined whether the vehicle has traveled a certain distance. If step S315 is affirmed, the process returns to the main routine, and if negative, the process returns to step S315.
[0027]
FIG. 12 is a flowchart showing a subroutine for performing the map matching process executed in step S305 in FIG. In step S351, road candidates to be subjected to map matching are extracted from the map information read in step S303 based on the current position of the vehicle detected in step S301 in FIG. In step S353, map matching processing is performed on the road extracted in step S351, and it is determined whether there is a road that can be map-matched. The process of map matching executed in step S353 is a conventionally known process, and thus detailed description is omitted, but the process is generally as follows. The driving condition, for example, road data matching the traveling direction of the host vehicle is searched. If there is matching road data, map matching is performed, and if there is no matching road data, a free driving state is set. If an affirmative determination is made in step S353, in step S355, the current position of the vehicle detected in step S301 is corrected based on the result of the map matching executed in step S353, and the process returns to the main routine. If a negative determination is made in step S353, the current position of the vehicle detected in step S301 is not corrected, a flag indicating a free running state in which map matching is not performed is set, and the process returns to the main routine.
[0028]
FIG. 13 is a flowchart showing a subroutine of step S40 in FIG. In this subroutine, when the state of free running satisfies a certain condition, that is, when there is a possibility that the vehicle is running on a new road that is not included in the map information of the on-vehicle device 100, the latest information that the distribution center 200 has It requests the distribution center 200 to compare the map information with the map information corresponding to the map information stored in the vehicle-mounted device 100. When the result of the comparison at the distribution center 200 is received and the map information is updated, the map information of the vehicle-mounted device can be updated with the latest map information at the discretion of the user.
[0029]
In step S401, as a result of executing the subroutine of the map matching process shown in FIG. 12 (the subroutine of step S305 in FIG. 11), it is determined whether or not there is a free running state, that is, whether or not there is a flag indicating the free running state. . If an affirmative determination is made in step S401 (the free running flag is present), the process proceeds to step S403, and it is determined whether the current position of the vehicle is in or near a service area such as an expressway or a parking area. That is, it is determined whether or not the vehicle is located at a point related to those areas. If a negative determination is made in step S403, the process proceeds to step S405, and it is determined whether the vehicle is turning. If a negative determination is made in step S405, the process proceeds to step S407, in which it is determined whether or not map matching is not performed and the free running state continues for a predetermined time or more. That is, it is determined whether or not the flag indicating the free running state is continuously set for a predetermined time or more.
[0030]
If the determination in step S407 is affirmative, the process proceeds to step S409, where the mobile phone 150 transmits the mesh number of the map information of the surrounding area including the position where the vehicle is currently traveling, together with the Car ID, to the distribution center 200. As will be described later, the distribution center 200 transmits the map information corresponding to the map information stored in the in-vehicle device 100 determined from the Car ID with respect to the map information of the mesh including the position where the vehicle is currently traveling. Is compared with the latest map information, and the result is transmitted to the vehicle-mounted device 100. The vehicle-mounted device 100 waits in step S411 until receiving the result of the comparison. This comparison is preferably performed for each type of map data such as road data, background data, and POI data, and is preferably updated for each data type. If any data is updated by comparing the mesh units, the mesh may be recognized as an updated mesh. In step S413, it is determined whether or not the map information has been updated based on the comparison result received in step S411. If an affirmative determination is made in step S413, in step S415, the driver is notified by displaying that new map data is present on the display monitor 119 as shown in FIG. 14, and the process proceeds to step S417. FIG. 14 shows that the marker 1 indicating the current position of the vehicle deviates from the road 10 displayed on the display monitor 119 because the map information of the on-vehicle device 100 is old, indicating a place where no road is displayed. This is an example.
[0031]
In step S417, the process waits until the update center display data transmitted by the distribution center 200 to present the update status to the driver is received. If it is determined in step S417 that the update status display data has been received, the received data is temporarily stored in the RAM 115, and the process proceeds to step S419. As shown in FIG. Is displayed on the display monitor 119 in a superimposed manner. The update status display data received by the on-vehicle device 100 compares the map information corresponding to the map information stored in the on-vehicle device 100 with the latest map information held by the distribution center 200, as described later. Therefore, the data is simple display data created for presenting new information that is not included in the map information of the vehicle-mounted device 100 to the driver in an easy-to-understand manner. FIG. 15 is an example showing a state in which a new road 20 or 21 or a mark 22 indicating a new facility which is not included in the map information of the on-vehicle device 100 is displayed on the display monitor 119 in a simplified manner superimposed on the map information of the on-vehicle device. A Yes button 23 and a No button 24 are displayed below the display monitor 119 shown in FIG. These buttons 23 and 24 are touch panel switches for allowing the driver to select whether or not to receive the latest map information of the distribution center 200.
[0032]
In step S421, it is determined which of the Yes button 23 and the No button 24 shown in FIG. 15 has been pressed, and it is determined whether an update instruction has been issued from the driver. If the determination in step S421 is affirmative, that is, if it is determined that the Yes button 23 has been pressed, the process proceeds to step S423, and a request for transmitting the latest map information for the mesh including the current position of the vehicle is transmitted to the distribution center 200 together with the Car ID. I do. In step S425, the process waits until the latest map information transmitted from distribution center 200 is received. If it is determined in step S425 that the latest map information has been received and stored in the RAM 115, the process proceeds to step S427, and the latest map information received in step S425 and stored in the RAM 115 for the mesh including the current position of the vehicle. Is stored in the storage memory of the map storage unit 112, and the process returns to the main routine. When the subroutine ends and returns to the main routine, the update status display data and the update map data temporarily stored in the RAM 115 are deleted.
[0033]
In the following cases, the processing in the subroutine of FIG. 13 ends, and the process returns to the main routine.
(1) When a negative determination is made in any of steps S401, S407, S413, and S421 (2) When a positive determination is made in step S403 or S405
-First embodiment: Summary of operation of vehicle-mounted device 100-
The in-vehicle device 100 according to the first embodiment described above can perform various types of navigation. When performing the route search, the distribution center 200 can execute the route search using both the map information corresponding to the map information stored in the vehicle-mounted device 100 and the latest map information. When it is determined that the route search results of the distribution center 200 are different, the distribution center 200 can be requested to distribute the latest map information by the driver's selection. Then, based on the latest map information received from the distribution center 200, the in-vehicle device 100 can perform a route search operation to guide the route. The search result based on the latest map of the distribution center 200 may also be transmitted to the vehicle-mounted device 100 via communication, and route guidance may be performed based on the search result.
[0035]
Further, if the free-running state in which the map matching is not performed during the traveling continues, the on-vehicle device 100 transmits the map information corresponding to the map information stored in the on-vehicle device 100 and the distribution center 200 to the mesh including the current position of the vehicle. Requesting the distribution center 200 to compare the latest map information of the distribution center 200. However, since the vehicle is likely to be in a free running state due to the turning of the vehicle at the next location, the request to the distribution center 200 is not made.
(1) In a service area such as an expressway or in a parking area or in the vicinity thereof (2) When a vehicle is clearly turning As a result of comparison at the distribution center 200, the map is updated for a mesh including the current position of the vehicle. In such a case, the update status display data is superimposed on the map information of the vehicle-mounted device and displayed on the display monitor 119, and the driver is determined whether or not the update is necessary. When the driver instructs to update, a request is made to transmit the latest map information. Then, the received latest map information is stored in the semiconductor storage memory of the map storage unit 112, and thereafter, this map information is used.
[0036]
――― Operation of distribution center 200 ―――
The operation of the distribution center 200 will be described with reference to FIGS. FIG. 16 is a flowchart showing the processing of the main routine of the program executed by the request receiving server 201 of the distribution center 200. In step S51, the process waits until data transmitted from the vehicle-mounted device 100 is received. If it is determined in step S51 that the data transmitted from the on-vehicle device 100 has been received, the process proceeds to step S53, where the data transmitted from the on-vehicle device 100 includes the map information corresponding to the map information stored in the on-vehicle device 100. It is determined whether or not a request for performing a new / old comparison for a predetermined mesh is included. If the determination in step S53 is affirmative, the process proceeds to step S60, in which the request processing server 203 is requested to perform an operation of performing a comparison between a new mesh and a new mesh for a predetermined mesh of the map information corresponding to the map information stored in the vehicle-mounted device 100 ( Instruct). If a negative decision is made in step S53, the operation proceeds to step S55. In step S55, the data transmitted from the in-vehicle device 100 includes a request to perform a route search operation using map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information for comparison. It is determined whether or not. The new and old map information is stored in the map / POI server 202. When step S55 is affirmed, the process proceeds to step S70. In step S70, the request processing server 203 is requested (instructed) to perform the route search calculation using the latest map information and the map information corresponding to the map information stored in the on-vehicle device 100 to perform comparison. . If a negative determination is made in step S55, a series of operations for making a request (instruction) to the request processing server 203 ends.
[0037]
FIG. 17 is a flowchart showing the processing of the program executed in step S60 of FIG. In step S601, based on the Car ID and the mesh number transmitted from the on-vehicle device 100, the version of the latest map information of the on-vehicle device at that time stored in the map storage unit 112 of the on-vehicle device 100 is determined for the mesh. Inquire of the customer DB server 204. When the map has never been updated, the version of the DVD-ROM 113 is used, but after the update is performed, the version of the map mesh stored in the storage memory of the map storage unit 112 is used. In step S603, the map mesh version inquired in step S601 is compared with the latest map mesh version stored in the map / POI server 202, and the flow advances to step S605. In step S605, it is determined that there is a difference in the result compared in step S603, that is, the latest map information of the distribution center 200 has been updated with respect to the map information corresponding to the map information stored in the vehicle-mounted device 100. Then, the process proceeds to step S607, instructs the request reception server 201 to transmit to the vehicle-mounted device 100 that the map information has been updated, and proceeds to step S609.
[0038]
In step S609, update status display data for notifying the driver of the update status is created. This update status display data is created by comparing both the latest version of the map information stored in the map / POI server 202 and the version of the map information corresponding to the map information stored in the vehicle-mounted device 100. You. The update status display data includes road, facility, and traffic regulation information that is in the latest map mesh version but not in the map mesh version of the vehicle-mounted device 100 on the display monitor 119 of the vehicle-mounted device 100 together with the map information. This is data that can be superimposed and displayed.
[0039]
In step S611, the request reception server 201 is instructed to transmit the update status display data created in step S609 to the vehicle-mounted device 100, and the process proceeds to step S613. In step S613, it is determined whether or not there has been a request for transmission of the latest map information from in-vehicle device 100 to distribution center 200. If step S613 is affirmed, the process proceeds to step S615. In step S615, the request receiving server 201 is instructed to read out the latest map information from the map / POI server 202 and transmit it to the on-vehicle device 100 for the mesh for which the comparison request has been made. Further, the mesh number and the version of the latest map information transmitted to the on-vehicle device 100 are stored in the customer DB server, and the process ends. FIG. 18 is a diagram illustrating an example of data stored in the customer DB server 204. A mesh number and version information of the mesh are stored for each Car ID.
[0040]
If a negative determination is made in step S605, the process advances to step S617 to instruct the request reception server 201 to transmit to the in-vehicle device 100 that the map information has not been updated, and the process ends. If a negative determination is made in step S613, the process ends.
[0041]
FIG. 19 is a flowchart showing the processing of the program executed in step S70 of FIG. In step S701, the area (mesh) of the map information used in the route search is determined based on the route search condition transmitted from the vehicle-mounted device 100, and the process proceeds to step S703. In step S703, the version of the map information stored in the map storage unit 112 of the on-vehicle device 100 and the version of the latest map information are extracted from the Car ID transmitted from the on-vehicle device 100 for the mesh of the map information used in the route search. To the customer DB server 204 for comparison.
[0042]
In step S705, as a result of comparing the versions of each mesh in step S703, it is determined whether or not there is an updated mesh. If an affirmative determination is made in step S705, the process proceeds to step S707, in which a route search is executed based on the map information corresponding to the version of the map information stored in the map storage unit 112 of the vehicle-mounted device 100 and the latest map information. To step S709. Note that the version of the map information stored in the map storage unit 112 of the on-vehicle device 100 is the version of the DVD-ROM 113 when the map is not updated at all, but after the update is performed, The version of each map mesh stored in the storage memory of the map storage unit 112. In step S709, it is determined whether or not the recommended routes match based on the two route search results executed in step S707. If a negative determination is made in step S709, that is, if it is determined that the recommended routes do not match, in step S711, the request reception server 201 is instructed to transmit to the in-vehicle device 100 that the map information is updated, and the flow advances to step S713. move on. In step S713, it is determined whether or not there has been a request for transmission of the latest map information from the vehicle-mounted device 100 to the distribution center 200. If an affirmative determination is made in step S713, in step S715, the request reception server 201 is instructed to read out the latest map information from the map / POI server 202 and transmit it to the vehicle-mounted device 100 for the mesh for which the route search has been performed. Further, the mesh number and the version of the latest map information transmitted to the on-vehicle device 100 are stored in the customer DB server, and the process ends.
[0043]
If an affirmative determination is made in step S709, the process proceeds to step S721, and it is determined whether the guidance data has been updated based on the two route search results executed in step S707. When step S721 is affirmed, the process proceeds to step S711. If a negative determination is made in step S721 or a negative determination is made in step S705, the process advances to step S723 to instruct the request reception server 201 to transmit to the in-vehicle device 100 that the map information has not been updated, and the process ends. . Note that the route search result information obtained by the above-described route search calculation includes route data (recommended route) and guidance data.
[0044]
--- First Embodiment: Summary of Operation of Distribution Center 200--
In the distribution center 200 of the first embodiment described above, in response to a request from the on-vehicle device 100, the map information corresponding to the map information stored in the on-vehicle device 100 is compared with the latest map information and updated. If the update has been performed, the in-vehicle device 100 is notified that the update has been performed. Then, the latest map information can be transmitted to the vehicle-mounted device 100 in response to a transmission request from the vehicle-mounted device 100. The distribution center 200 stores and manages the version of the map information stored in the map storage unit 112 of the in-vehicle device 100 in the customer DB server 204 for each Car ID. When the latest map information is transmitted from the distribution center 200 to the vehicle-mounted device 100, the transmitted mesh number and version are stored in the customer DB server 204 (see FIG. 18).
[0045]
The car navigation device according to the first embodiment has the following advantages.
(1) The in-vehicle device 100 requests the distribution center 200 to perform a route search operation using both the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information of the distribution center 200. The necessity of updating the map is determined based on the result of the route search calculation executed by the distribution center 200. Therefore, it is not necessary to increase the device configuration of the vehicle-mounted device 100, and it is possible to determine whether or not to update the map and to distribute the updated map information as necessary without increasing the processing time during route guidance. It can be received from the center 200. Further, since the in-vehicle device 100 performs a route search based on the received updated map information, the vehicle can be efficiently guided.
(2) Since the updated map management table is provided in the map storage unit 112 of the on-vehicle device 100, the map information received from the distribution center 200 and stored in the storage memory and the pre-updated map information stored in the DVD-ROM 113 The latest data can be used from the map information, and accurate route search and display can be performed.
(3) The selection screen of the route search mode is displayed on the display monitor 119. In the distribution center 200, whether to instruct a route search both in the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information in the distribution center 200, or to instruct the route search based on the map information in the in-vehicle device 100 Can be selected by the driver's judgment, so that an efficient route search can be performed.
(4) The route search mode can be determined by setting the mode of the vehicle-mounted device 100 in advance. For example, immediately after purchasing the in-vehicle device 100 or immediately after updating all the map information of the whole country, the setting is made so that only the search button 5 on the in-vehicle device 100 is displayed. Can be prevented. This is effective in reducing communication costs and reducing the load on each server of the distribution center 200. When the map information of the on-vehicle device 100 is out of date, the server is set to display only the server search button 6 to make an inquiry to the distribution center 200, and the map information on the on-vehicle device 100 becomes obsolete. Inappropriate route guidance due to the conversion can be prevented.
(5) Since the map update request is sent to the distribution center 200 based on the driving situation determined by the on-vehicle device 100, the trouble of updating the map is eliminated, and it is ensured without any special operation such as route search. In addition, a map update request can be made automatically.
(6) It is not necessary to newly use a map update determination algorithm by using the free running state by map matching as the above-mentioned running situation and determining whether or not to request the distribution center 200 to update the map based on the presence or absence of the free running state. In this case, when the vehicle is located at a point related to the service area or the parking area, no inquiry is made to the distribution center 200, so that the reliability of the map update determination is also improved. Further, since it is possible to prevent the inquiry to the distribution center 200 unnecessarily, the communication time and the communication cost can be reduced, and the burden on each server of the distribution center 200 can be reduced.
(7) As a result of the map comparison at the distribution center 200, when there is an update on the mesh including the current position of the vehicle, the update status display data is superimposed on the map information of the on-vehicle device 100 and is displayed on the display monitor 119. Simple display is used. Thus, the driver can easily determine whether or not the update is necessary. Further, only when the driver determines that it is necessary, it is possible to request the transmission of the latest map information to the distribution center 200, which is effective in reducing the communication cost and the load on each server of the distribution center 200.
(8) Since the distribution center 200 only needs to compare the new and old map information for the required meshes in response to the inquiry from the vehicle-mounted device 100, the computation load performed by the distribution center 200 can be reduced.
(9) When the distribution center 200 transmits information to the in-vehicle device 100 in response to an inquiry from the in-vehicle device 100, first, the data capacity of data such as data indicating that the map information has been updated and update status display data. Send less data. Only when there is a request from the in-vehicle device 100, the updated map information is transmitted. This prevents unnecessary transmission and reception of data, thereby reducing the communication cost of each of the vehicle-mounted device 100 and the distribution center 200, and is effective in reducing the load on each server of the distribution center 200.
[0046]
――― Second embodiment ―――
A second embodiment of the present invention will be described with reference to FIGS. The distribution center 200 according to the second embodiment receives a request for comparing map information corresponding to the map information stored in the in-vehicle device 100 with the latest map information of the distribution center 200 from the in-vehicle device 100, Of the map information corresponding to the map information stored in the vehicle-mounted device 100, the latest one is compared with the latest map information of the distribution center 200. When the update status display data created by the distribution center 200 is displayed on the display monitor 119 of the in-vehicle device 100, the update status display data is appropriately displayed in a display form according to the scale factor, the running / stop state of the vehicle, and the like. Possible data. The in-vehicle device 100 according to the second embodiment displays the update status display data transmitted from the distribution center 200 according to the scale factor, the running / stop state of the vehicle, and the like. The latest map information can be requested from the distribution center 200 for the mesh.
[0047]
――― Operation of distribution center 200 ―――
First, the operation of the distribution center 200 according to the second embodiment will be described. The difference between the first embodiment and the second embodiment in the distribution center 200 is, as described above, the comparison range of the new and old map information and the display form of the update status display data to be created. Other operations are the same as those in the first embodiment, and a description thereof will not be repeated.
[0048]
FIG. 20 is a flowchart showing the processing of the program executed in step S60 of FIG. In step S1601, the latest map information version stored in the map storage unit 112 of the on-vehicle device 100 at that time is updated from the Car ID transmitted from the on-vehicle device 100 to all data of all meshes. An inquiry is made to the customer DB server 204 about the type. In step S1603, the version of each mesh inquired in step S1601 is compared with the latest version of each mesh stored in the map / POI server 202, and the flow advances to step S1605. In step S1605, it is determined that there is a difference in the result compared in step S1603, that is, there is a mesh that has been updated with respect to the map information corresponding to the latest map information on the in-vehicle device stored in the in-vehicle device 100. Then, the process proceeds to step S1607. In step S1607, the request reception server 201 is instructed to transmit to the in-vehicle device 100 that the map information has been updated, and the process proceeds to step S1609.
[0049]
In step S1609, as a result of the comparison in step S1603, update status display data for notifying the driver of the update status is created for the updated mesh. This update status display data is created by comparing both the latest version of the map information stored in the map / POI server 202 and the version of the map information corresponding to the map information stored in the vehicle-mounted device 100. You. The update status display data includes road, facility, and traffic regulation information that is in the latest map mesh version but not in the map mesh version corresponding to the map information stored in the vehicle-mounted device 100. This is data that can be superimposed and displayed on the display monitor 119 together with the map information. FIG. 21 is a diagram illustrating an example of data stored in the customer DB server 204 according to the second embodiment. A mesh number is stored for each Car ID, and version information is stored for each data item (type) such as road data, background data, and guidance data corresponding to each mesh number.
[0050]
In step S1611, the request reception server 201 is instructed to transmit the update status display data created in step S1609 to the in-vehicle device 100, and the process advances to step S1613. In step S1613, it is determined whether or not there has been a request for transmission of the latest map information from in-vehicle device 100 to distribution center 200. If an affirmative determination is made in step S1613, the process advances to step S1615 to update the latest map information for all the information included in the mesh requested to be updated or information of some items selected by the driver to the map / POI. It instructs the request receiving server 201 to read out from the server 202 and transmit it to the vehicle-mounted device 100. Further, the mesh number and version of the latest map information transmitted to the on-vehicle device 100 and the transmitted items are stored in the customer DB server, and the process ends.
[0051]
If a negative determination is made in step S1605, the flow advances to step S1617 to instruct the request reception server 201 to transmit to the vehicle-mounted device 100 that the map information has not been updated, and the process ends. If step S1613 is negatively determined, the process ends.
[0052]
――― Operation of onboard unit 100 ―――
Next, an operation of the vehicle-mounted device 100 according to the second embodiment will be described. The difference between the first embodiment and the second embodiment lies in the display form of the update status display data described below and the method of determining the area (mesh) for requesting the distribution center 200 to transmit the latest map information. is there. Other operations are the same as those in the first embodiment, and a description thereof will not be repeated.
[0053]
FIG. 22 is an example of a display screen when the update status display data transmitted from the distribution center 200 is displayed on the display monitor 119 of the on-vehicle device 100, and is shown in FIG. 13 of the first embodiment. This corresponds to step S419 in the flowchart shown in FIG. As shown in FIG. 22, in the case of a screen display that displays a small scale factor and displays the whole of Japan, a star icon 50 is displayed at a predetermined position corresponding to the updated mesh. When the scale is increased from this state and, for example, the scale is changed so that the entire Kanto region is displayed on the display monitor 119, the icon 50 disappears and is updated as shown in FIGS. Existing meshes and updated but previously received meshes are displayed with their background colors changed.
[0054]
When the scale is further increased from the state shown in FIG. 24 to a scale at which one updated mesh is displayed on the entire surface of the display monitor 119, the scale is updated as shown in FIG. Is displayed. For example, a newly created road 61 is displayed, and a newly created facility is displayed as an icon 62. The updated portion is easier to distinguish from the non-updated portion, for example, by making it brighter or blinking than the non-updated portion. The facilities that have disappeared are also displayed with a light gray icon 63 so that they can be distinguished from the facilities that have been newly created. 23 to 25, an update button 60 is displayed at the lower right of the screen of the display monitor 119. When the driver presses the update button 60, the mode is set to the update area selection mode.
[0055]
In the update area selection mode, as shown in FIG. 26, the scale is displayed such that a plurality of updated meshes are displayed. At this time, the driver can select a plurality of meshes of the latest map information received from the distribution center 200 by using the input device 117 of the vehicle-mounted device 100. The portion where the frame of the mesh in FIG. 26 is drawn thick indicates the selected mesh. After the mesh of the latest map information received from the distribution center 200 is selected, when the determination button 65 displayed on the lower right of the display monitor 119 is pressed, the latest map information is transmitted for the selected mesh. Requesting the distribution center 200 to perform the operation. This operation corresponds to step S423 in the flowchart shown in FIG. 13 of the first embodiment. After that, the latest map information transmitted from the distribution center 200 is stored as the map information of the vehicle-mounted device 100. However, since the operation is the same as that of the first embodiment, the description is omitted.
[0056]
――― Display example of update status display data ―――
In FIG. 25 described above, the updated content indicates a new road or a new facility is displayed by an icon or the like. FIG. 27 shows an example in which a display of explanation is added to the display of FIG. For example, information 66 on the opening date of a store to be newly opened, toll information 67 on a newly opened toll road, and the like may be displayed simultaneously as additional information. Further, it may be detected that the vehicle is stopped based on the operation of the parking brake of the vehicle or the vehicle speed signal, and the update information content as shown in FIG. 28 may be displayed as a list in characters. In this list display, information on points not displayed depending on the scale of the map displayed on the display monitor 119, the degree of update that is difficult to understand only by displaying icons, or the volume of update such as guidance information that is not normally displayed on the map screen, It can be clearly presented by displaying it in characters. Further, as shown in FIG. 29, the list display may be provided with an update button 70 for each type so that it can be individually updated according to the type of update content. In this case, the on-vehicle device 100 requests only the information of the item corresponding to the pressed update button 70 from the distribution center 200. FIG. 29 shows a case where road data, background data, and facility data are included as map information.
[0057]
The car navigation device according to the second embodiment described above has the following functions and effects in addition to the functions and effects of the first embodiment.
(1) When there is an inquiry about the on-vehicle device 100, the distribution center 200 compares the latest one of the map information corresponding to the map information stored in the on-vehicle device 100 with the latest map information of the distribution center 200, Send the update status to the on-board unit. Also, the latest map information can be transmitted for a plurality of areas designated by the driver who has confirmed the update status. Thereby, the driver can grasp the update status of the map information nationwide, and can receive the latest map information about the map information of a plurality of areas determined to be necessary. Can be updated.
(2) When the update status display data created by the distribution center 200 is displayed on the display monitor 119 of the in-vehicle device 100, the data can be displayed in a display form corresponding to the scale factor, the running / stopping state of the vehicle, and the like. Data. The driver can grasp the update content of the map information from multiple aspects by the update status display data in which the presence or absence of the update and the content are appropriately displayed according to the scale. This allows the driver to efficiently receive the map information that the driver truly wants to update.
(3) The update status display data displayed on the display monitor 119 of the on-vehicle device 100 is data that can be displayed in a display form according to the scale factor, the running / stopping state of the vehicle, and the like. As a result, safe traveling of the vehicle becomes possible.
[0058]
――― Modifications ―――
In the above-described first embodiment, when the free running state satisfies a certain condition, the distribution center 200 compares the new and old map information only for the mesh including the current position of the vehicle. However, the present invention is not limited to this. The distribution center 200 may also compare the new and old map information with the mesh around the mesh including the current position of the vehicle. Conversely, in the above-described second embodiment, the distribution center 200 compares the new and old map information for all the meshes of the map information corresponding to the map information stored in the vehicle-mounted device 100. The present invention is not limited to this. For example, when the vehicle is traveling in Tokyo, the distribution center 200 may compare the old and new map information for the mesh including Tokyo and each prefecture adjacent to Tokyo. Further, when the free running state satisfies a certain condition, the distribution center 200 may be able to set in advance the range in which the map information is to be compared with the old and new ones in the vehicle-mounted device 100. It may be possible to set so as not to compare new and old information. In particular, the latter function can prevent unnecessarily inquiring of the distribution center 200 immediately after purchasing the on-vehicle device 100 or immediately after updating all the map information nationwide. This is effective for reducing the load on the server.
[0059]
In the above description, in the subroutine of step S40 in the flowchart shown in FIG. 3, even if the vehicle is in a free running state, the current position of the vehicle is in or near a service area such as an expressway or a parking area, or When it is determined that the vehicle is turning, the distribution center 200 is not requested to compare the latest map information held by the distribution center 200 with the map information corresponding to the map information stored in the vehicle-mounted device 100. Although the processing in the subroutine has been completed, the present invention is not limited to this. A request for comparison is made to the distribution center 200 after the free running state continues for a predetermined time. If the current position of the vehicle is in a service area such as an expressway or in a parking area or in the vicinity thereof, the set value is set. The request may be delayed by changing (extending) the predetermined time. A predetermined distance may be used instead of the predetermined time.
[0060]
In the above description, the route search is performed by the distribution center 200 using the mesh of the version corresponding to the map information of the vehicle-mounted device 100 and the mesh of the latest map information, but the present invention is not limited to this. The vehicle-mounted device 100 performs a route search using its own map, and the distribution center 200 performs a route search based on the latest map information. Then, of the route search results, the route search result of either the in-vehicle device 100 or the distribution center 200 is transmitted to the other, and the other side compares the route search results to determine whether or not the map information is updated. It may be.
[0061]
In the above description, after the distribution center 200 notifies the in-vehicle device 100 that the latest map is present and the update is necessary, the distribution center 200 sends the latest map to the in-vehicle device 100 when the in-vehicle device 100 requests distribution of the latest map. Although the latest map information is transmitted, the present invention is not limited to this. When the distribution center 200 determines that the update is necessary, the latest map information may be transmitted to the in-vehicle device 100 without notifying the in-vehicle device 100 that the update is required.
[0062]
In the above description, the information transmitted from the distribution center 200 is displayed on the display monitor 119 to notify the driver, but the present invention is not limited to this. The notification may be made by voice, or may be made by voice along with the display. Further, each of the above-described embodiments and modified examples may be combined.
[0063]
In the above embodiment and its modified example, the map data storage unit before update corresponds to the RAM 115, and the map data storage unit for update corresponds to the map storage unit 112. The present invention is not at all limited to the device configuration in the above-described embodiment as long as the characteristic functions of the present invention are not impaired.
[0064]
【The invention's effect】
According to the present invention, the updated content of the updated map data is displayed in a different display form according to the scale, so that the presence or absence of the update and the content are appropriately displayed according to the scale.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a first embodiment in which an in-vehicle terminal device according to the present invention is applied to a car navigation device.
FIG. 2 is a system block diagram of the vehicle-mounted device 100 according to the first embodiment.
FIG. 3 is a flowchart showing a process of a main routine of a program executed by the on-vehicle device 100 of FIG. 2;
FIG. 4 is a flowchart showing a subroutine of step S20 in the flowchart shown in FIG. 3;
5 is an example of a screen displayed on a display monitor 119 of the vehicle-mounted device 100 in FIG. 2, and is a diagram showing a selection screen of a route search mode.
6 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing a screen on which only a server search button 6 is displayed among buttons for selecting a route search mode.
FIG. 7 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing a screen on which only a search button 5 among buttons for selecting a route search mode is displayed.
8 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 of FIG. 2, and is a diagram showing a display screen of step S231 in the flowchart shown in FIG.
9 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 of FIG. 2, and is a diagram showing a display screen of step S215 in the flowchart shown in FIG.
10 is an example of a screen displayed on the display monitor 119 of the on-vehicle device 100 in FIG. 2, and is a diagram showing a display screen in step S225 in the flowchart shown in FIG.
FIG. 11 is a flowchart showing a subroutine of step S30 in the flowchart shown in FIG. 3;
FIG. 12 is a flowchart showing a subroutine of step S305 for performing a map matching process in the flowchart shown in FIG. 11;
FIG. 13 is a flowchart showing a subroutine of step S40 in the flowchart shown in FIG. 3;
14 is an example of a screen displayed on the display monitor 119 of the on-vehicle device 100 in FIG. 2, and is a diagram showing a display screen in step S415 in the flowchart shown in FIG.
15 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing a display screen in step S419 in the flowchart shown in FIG.
FIG. 16 is a flowchart showing a process of a main routine of a program executed by the request receiving server 201 of the distribution center 200 of FIG.
FIG. 17 is a flowchart showing processing of a program executed by the request processing server 203 of the distribution center 200 of FIG.
18 is a diagram illustrating an example of data stored in a customer DB server 204 of the distribution center 200 in FIG.
FIG. 19 is a flowchart showing processing of a program executed by the request processing server 203 of the distribution center 200 of FIG.
FIG. 20 is a flowchart illustrating processing of a program executed by a request processing server 203 according to the second embodiment.
FIG. 21 is a diagram illustrating an example of data stored in a customer DB server 204 according to the second embodiment.
22 is a diagram showing an example of a screen displayed on the display monitor 119 in the vehicle-mounted device 100 according to the second embodiment, and is a diagram showing a display screen of update status display data transmitted from the distribution center 200. FIG.
23 is an example of a screen displayed on the display monitor 119 in the vehicle-mounted device 100 according to the second embodiment, and is a diagram showing a display screen when the scale of FIG. 22 is changed.
24 is an example of a screen displayed on the display monitor 119 in the vehicle-mounted device 100 according to the second embodiment, and is a diagram showing a display screen when the scale of FIG. 23 is changed.
FIG. 25 is an example of a screen displayed on the display monitor 119 in the vehicle-mounted device 100 according to the second embodiment, and is a diagram showing a display screen when the scale of FIG. 24 is changed.
FIG. 26 is a diagram illustrating an example of a screen displayed on the display monitor 119 in the vehicle-mounted device 100 according to the second embodiment, and is a diagram illustrating a display screen for selecting an update area.
FIG. 27 is an example of a screen displayed on a display monitor 119 in the vehicle-mounted device 100 according to the second embodiment.
FIG. 28 is an example of a screen displayed on the display monitor 119 in the vehicle-mounted device 100 according to the second embodiment.
FIG. 29 is an example of a screen displayed on a display monitor 119 in the vehicle-mounted device 100 according to the second embodiment.
[Explanation of symbols]
REFERENCE SIGNS LIST 100 On-board unit 111 Current location detection device 111a Direction sensor 111b Vehicle speed sensor 111c GPS sensor 111d Gyro sensor 112 Map storage unit 113 DVD-ROM
114 Control circuit 115 RAM
116 ROM 117 Input device 118 Image memory 119 Display monitor 150 Mobile phone 200 Distribution center 201 Request reception server 202 Map / POI server 203 Request processing server 204 Customer DB server 250 Mobile communication network

Claims (6)

When displaying the updated map data distributed in a predetermined mesh unit together with the map data before the update, a display form in which the presence / absence and content of the update of the map data are made different depending on the scale of the map is characterized. Update map data display method. The updated map data display method according to claim 1,
When displaying the updated map at the first scale, displaying an icon at a predetermined position in the area being updated and displaying the updated map at a second scale larger than the first scale Is a method of displaying an updated map data, wherein the entire area being updated is displayed in a display form different from that of other areas not updated. The updated map data display method according to claim 2,
When displaying the updated map at a third scale having a larger scale than the second scale, an icon is displayed at a predetermined position in an area being updated, wherein the updated map data is displayed. Method. The updated map data display method according to claim 3,
An updated map data display method, wherein when the updated facility data is displayed as a facility icon on the map display screen of the third reduced scale, information on the updated facility icon is displayed in characters. The updated map data display method according to any one of claims 1 to 4,
An updated map data display method, wherein when the vehicle is stopped, the updated content of the updated map data is displayed as character data. Pre-update map data storage means for storing map data for each scale factor;
Update map data storage means for storing the distributed update map data;
An in-vehicle terminal device, comprising: display means for displaying an updated map by the updated map data display method according to any one of claims 1 to 5.

Images