JP2002357442A - On-vehicle map display device and map display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make searchable for an optimum route connecting a current position to a destination again for making travel guide continuable along the searched route without any road data when deviating from a guided route. SOLUTION: In this on-vehicle display device 1, when deviating from the guided route during travel in a route guide mode, a guide route data acquisition processing part 12 requests re-retrieval of the optimum route from the current position to the destination from a map supporting device 30 arranged on an external network 20 via wireless communication, and the guide route data re-retrieved by using road data showing road structure by means of the map display supporting device 30 are received via the network 20 and stored in a guide route data storage part 10. On the basis of the current position detected by a GPS receiving part 2, a map display control part 13 draws an image, which is formed by superimposing the guide route and a current position mark on the map image, by using the map data and the re-retrieved guide route data to display it on a screen of a display part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle map display device and a map display system, and particularly to an on-vehicle map display device having no road data indicating a road configuration, while traveling along a guidance route. The present invention relates to an in-vehicle map display device and a map display system capable of re-searching and displaying a guidance route connecting a current location to a desired destination when the vehicle deviates from the guidance route.

[0002]

2. Description of the Related Art A conventional on-vehicle navigation device is a C-type navigation device.
A large-capacity storage medium such as a D-ROM or a DVD-ROM stores map data for drawing a map and road data for a route search indicating a road configuration. In a device having a route guidance function, when a user sets a departure place and a destination, an optimal route connecting the departure place and the destination is searched using road data, and stored in a memory as guidance route data, During driving, based on the current position detected by satellite navigation, a map image including the current position is drawn using map data around the current position together with a guidance route highlighted in red and a current position mark and displayed on the screen. Has become. The user can easily reach the destination by traveling along the highlighted guidance route on the screen. The user manually stores the guidance route data in which the guidance route from the departure point to the destination is input in the memory, and based on the current position detected by satellite navigation during driving, uses the map data around the current position to map the current position. A map image including the position can be drawn together with the guidance route and the current position mark highlighted in red and bold and displayed on the screen.

[0003]

However, if the vehicle does not have a storage medium for storing road data in order to use the on-vehicle navigation device as a portable device or the like, the navigation device is required to travel along the guidance route while traveling. When the vehicle deviates from the route, an optimal route connecting the current position to the destination is searched again, and it is not possible to provide travel guidance to the user on the searched guide route. The present invention has been made in view of the above-described problems of the related art,
Even if there is no road data, when the vehicle deviates from the guidance route, it automatically or in accordance with the user's instruction, re-searches for the optimal route connecting the current position to the destination, and the travel guidance for the user is provided by the searched guidance route. It is an object of the present invention to provide a map display device and a map display system that can be mounted on a vehicle.

[0004]

According to a first aspect of the present invention, there is provided an on-vehicle map display apparatus for detecting a current position, a display means for displaying a map image together with a current position mark, and a departure place. Map display for drawing a map image of a certain range including a current position together with a current position mark and a guide route using the map data and a guide route storage unit storing a guide route from the vehicle to the destination, and displaying the map image on the display unit Control means, determining means for determining whether the current position has deviated from the guidance route, and destination data and the latest detected current position data or current position when the determining means determines that the current position has deviated from the guidance route. The travel locus data including the current position in the vicinity is transmitted to the map display support device via the network to request a route search, and the current position transmitted from the map display support device is transmitted. Is characterized by receiving a new guidance route data to the destination, with a, a route search request means for storing the guidance route storage means from. The map display system according to the second aspect of the present invention comprises a map display support device and an on-vehicle map display device, wherein the map display support device includes road data storage means storing road data indicating a road configuration, and a destination. Based on the data and the current position data or traveling locus data near the current position including the current position,
Using the road data stored in the road data storage means,
Route search means for searching for an optimal route connecting the current position to the destination, destination data via an external certain in-vehicle map display device via a network, and the latest detected current position data or current position When a route search involving travel locus data in the vicinity of the current position is requested, the route search means is searched for an optimal route connecting the current position to the destination, and the searched route data is used as guidance route data as a request source on the vehicle. Distribution means for transmitting to the map display device via the network, while the on-vehicle map display device is a current position detection means for detecting the current position, a display means for displaying a map image with the current position mark, Using a guidance route storage means for storing a guidance route from a departure point to a destination and map data, a map image of a certain range including the current position is marked with a current position mark. Map display control means for drawing along with the guidance route and displaying on the display means, determination means for determining whether or not the current position deviates from the guidance route, and a destination when the determination means determines that the current position has deviated from the guidance route. Data, travel position data including the current position in the vicinity of the current position or the latest detected current position data is transmitted to the map display support device via the network to request a route search, transmitted from the map display support device Route guidance request means for receiving new guidance route data from the current position to the destination and storing the data in the guidance route storage means. According to a third aspect of the present invention, in the system according to the second aspect, the route searching means includes a current position data transmitted from a certain external map display terminal or a traveling locus data near the current position including the current position. The present invention is characterized in that a map is matched using road data to correct a current position, and then an optimal route connecting the corrected current position and a destination is searched. In the vehicle-mounted map display device according to the fourth aspect of the present invention, a current position detecting means for detecting a current position, a display means for displaying a map image together with a current position mark, and a guidance route from a departure point to a destination are stored. Map display control means for drawing a map image of a certain range including the current position together with the current position mark and the guide route using the obtained guide route storage means and the map data, and displaying the map image on the display means, and re-searching the guide route Means for instructing re-search of the guidance route by the instructing means, the destination data and the latest detected current position data or traveling locus data including the current position near the current position are transmitted via the network. Requesting a route search by transmitting to the map display support device, receiving new guidance route data from the current position to the destination transmitted from the map display support device, It is characterized by comprising: a route search request means for storing the road storage unit. Claim 5 of the present invention
The described map display system comprises a map display support device and an in-vehicle map display device. The map display support device includes road data storage means storing road data indicating a road configuration, destination data, and current position data. A route search unit that searches for an optimal route from the current position to the destination by using the road data stored in the road data storage unit based on travel locus data near the current position including the current position; When a route search is requested from a certain in-vehicle map display device via a network with destination data and the latest detected current position data or traveling locus data near the current position including the current position, the route searching means An optimal route from the current position to the destination is searched for, and the searched route data is routed to the requesting in-vehicle map display device as guidance route data. On the other hand, the in-vehicle map display device includes a current position detection unit that detects a current position, a display unit that displays a map image together with a current position mark, Guidance route storage means for storing the guidance route up to, and map display control means for drawing a map image of a certain range including the current position together with the current position mark and the guidance route using the map data and displaying the map image on the display means. Instruction means for instructing a re-search of the guidance route, and when the re-search for the guidance route is instructed by the instruction means, traveling including the destination data and the latest detected current position data or the current position near the current position. The trajectory data is transmitted to the map display support device via the network to request a route search, and new guidance from the current position transmitted from the map display support device to the destination is performed. To receive the road data, with a, a route search request means for storing the guidance route storage means, is characterized in. According to a sixth aspect of the present invention, in the system according to the fifth aspect, the route searching means includes a current position data transmitted from a certain external map display terminal or a traveling locus data near the current position including the current position. Map matching using road data,
After the current position is corrected, an optimal route connecting the corrected current position and the destination is searched.

[0005]

Next, one embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram of a map display system according to the present invention. Reference numeral 1 denotes an on-vehicle map display device, which is an Internet 2 which is a kind of public network.
It can wirelessly communicate with various servers placed on "0".
When the vehicle-mounted map display device 1 deviates from the guidance route while traveling along the guidance route, it automatically or in accordance with a user's instruction,
An external map display support device is re-searched via the Internet 20 for an optimal route from the current position to the destination, and the route search data obtained as a result of the re-search is obtained and stored in an internal route data storage unit. Then, using the stored guidance route data, the guidance route highlighted in red and thick on the map image is drawn and displayed on the screen.

Reference numeral 30 denotes a map display support device (map display support server) built on the Internet 20. In the map display support device 30, reference numeral 31 denotes a map information storage unit that stores map information obtained by combining map data for drawing a map image and road data indicating a road configuration for map matching and route search, and 32 denotes a departure point ( Or, given a current position) and a destination, a route search unit 33 for searching for an optimum route connecting the departure point (or the current position) and the destination with reference to the road data, a distribution unit 33, and the Internet 20 If there is a route search request by designating the departure place (or current position) and destination from an external in-vehicle map display device, the departure place (or current position) and destination are given to the route search unit 32. Execute the route search. The route search unit 32 uses the road data in the map information storage unit 31 to search for the shortest optimal route connecting the starting point (or the current position) to the destination by the Dijkstra method, the horizontal search method, or the like. Optimal route data in which the longitude and latitude of the node train from the departure point to the destination forming the route and the latitude and longitude of the departure point and the destination are arranged in order from the departure point to the destination are output to the distribution unit 33, and the distribution unit 33 transmits the data as guidance route data to the requesting vehicle-mounted map display device via the Internet 20.

[0007] Of the on-vehicle map display apparatus 1, 2 is a GPS receiving section for periodically detecting the current position and current direction by satellite navigation, 3 is a liquid crystal dot matrix type display section, 4 is an operation section, and a power supply is provided. On / off operation, inputting the coordinates of latitude and longitude of the departure point and the destination, and instructing the re-route search from the current position to the destination. Reference numeral 5 denotes a communication unit which connects to the Internet 20 by wireless communication when necessary, transmits a route search request signal to the map display support device 30 existing on the Internet 20, The navigation route data transmitted via the Internet 20 is received.

Reference numeral 6 denotes a map data storage unit for storing map data for drawing a map. Reference numeral 7 denotes a main body of a microcomputer. Among them, 8 is a running locus in which the latest M current position data are arranged in chronological order. This is a traveling locus data storage unit for storing data, and one current position data can be stored in each of the addresses AD1 to ADM. Reference numeral 9 denotes a running locus data registration unit which adds and writes in the running locus data storage unit 8 in order of addresses each time new current position data is output from the GPS receiving unit 2, and returns to the top after writing up to the last address. Write. Reference numeral 10 denotes a guidance route data storage unit that can store guidance route data. The guidance route data storage unit 10 has N storage areas from an address AD1 to an address ADN as shown in FIG. 3, and each of the storage areas can store longitude and latitude coordinates.

[0009] 11 is a determination unit off the guide route, compared to the guide route data stored current position to the guidance route data storage unit 10, when the current position away from the guidance route predetermined fixed distance L ₀ or more, the vehicle Is determined to have deviated from the guidance route. Reference numeral 12 denotes a guidance route data acquisition processing unit, and the operation unit 4
When the input operation of the latitude and longitude coordinates of the departure point and the destination is performed in,
The coordinates of the departure point and the destination are stored internally, and the communication unit 5 is controlled so as to be wirelessly connected to the Internet 20. Request the search of the optimal route from the departure point to the destination. In this case, the map display support device 30 is caused to transmit a route search request signal including the longitude and latitude coordinates of the departure place and the destination. When the guidance route deviation determination unit 11 determines that the vehicle has deviated from the guidance route, or when the operation unit 4 performs a re-route search instruction operation, the communication unit 5 is controlled to wirelessly connect to the Internet 20.
Map display support device 3 existing on Internet 20
For 0, a request is made to re-search for an optimal route from the current position to the destination. In this case, the map display support device 30 is caused to transmit a route search request signal including the travel locus data and the longitude and latitude coordinates of the destination. Then, when the guide route data is received by the communication unit 5, it is stored in the guide route data storage unit 10.

Reference numeral 13 denotes a map display control unit which, when the route guidance mode is off, draws a map image of a certain range around the current position together with the current position mark and displays it on the screen of the display unit 3, and when the route guidance mode is on, Then, a map image of a certain range around the current position is drawn together with the current position mark and the enhanced guidance route in which the guidance route is emphasized in red and thick, and is displayed on the display unit 3 on the screen. An image memory unit 14 of the map display control unit 13 has an image storage area for one screen of the display unit 3 and is an image in which a current position mark is superimposed on a map image (when the route guidance mode is off). An image in which the current position mark and the enhanced guidance route are superimposed on the map image (when the route guidance mode is on) is stored.

Reference numeral 15 denotes a drawing unit which, based on the current position data and the current azimuth data input from the GPS receiving unit 2, uses the map data around the current position stored in the map data storage unit 6 to store it in the image memory unit 14. Draws a map image of a predetermined scale with the current position as the center and the north facing upward, and draws a current position mark with the direction corresponding to the current direction superimposed in the middle of the map image when the route guidance mode is off. .
When the route guidance mode is ON, the map image is drawn after the enhanced guidance route is displayed in the guidance route data storage unit 10 in which the range of the map image drawn in the image memory unit 14 is superimposed on the map image and emphasized in red and thick. A current position mark with a direction corresponding to the current direction is superimposed and drawn in the middle of. Reference numeral 16 denotes a video conversion unit, which converts an image stored in the image memory unit 14 into a video signal, outputs the video signal to the display unit 3, and displays it on a screen.

FIG. 4 is a flowchart showing a main control process of the main body 7, FIG. 5 is a flowchart showing a control process of a guide route departure judging section 11 and a guide route data acquisition processing section 12 in the main body 7, and FIG. FIG. 72 is an explanatory diagram of an operation of re-searching for an optimal route when the vehicle deviates from the guidance route, and FIG. 72 is an explanatory diagram of a screen display example of the display unit 3. Hereinafter, the operation of the above-described embodiment will be described with reference to these drawings. I do. In the main body 7, the main control process shown in FIG. 4 and the control process shown in FIG. 5 are executed in parallel. It is also assumed that nothing is initially stored in the traveling locus data storage unit 8 and the guidance route data storage unit 10, and that the route guidance mode is off.

(1) Drawing and Display of Map Image with Route Guidance Mode Off After power-on, the GPS receiver 2 periodically outputs data on the current position and current direction detected by satellite navigation. When the data of the first current position and the current azimuth are output from the GPS receiving unit 2 at time t ₁ , the traveling locus data registration unit 9 stores the coordinate of the first current position in the head address AD 1 of the traveling locus data storage unit 8. Write the coordinates (steps S10 and S10 in FIG. 4).
11. (See FIG. 2). Subsequently, based on the data of the current position and the current azimuth, the drawing unit 15 uses the map data in the map data storage unit 6 to store a map image of a predetermined scale with the current position as the center and the north facing upward. (Step S12). Subsequently, it is checked whether or not the route guidance mode is on (step S13).
The current position mark is drawn in the direction corresponding to the current direction at the center of the map image drawn in step S15 (step S15). The map image and the current position mark drawn in the image memory unit 14 are read out by the video conversion unit 16 and converted into a predetermined video signal, output to the display unit 3 and displayed on the screen (step S16).

After step S16, the flow returns to step S10 to wait for the data of the second current position and current direction to be output from the GPS receiver ₂ at time t2. The unit 9 writes the longitude and latitude coordinates of the second current position into the address AD2 of the travel locus data storage unit 8 (see FIG. 2), and the drawing unit 15 stores the current position and the current azimuth data in the map data storage unit 6. Using the map data, a map image of a predetermined scale with the current position as the center and the north facing upward is drawn together with the current position mark. The map image and the current position mark drawn in the image memory unit 14 are read out by the video conversion unit 16 and converted into a predetermined video signal, output to the display unit 3 and displayed on the screen (steps S11 to S13, S15). , S16). Hereinafter, the same processing is repeated, and the user can confirm the current position on the map. The current position detected by the GPS receiver 2 changes as the vehicle moves, and the map image on the screen also moves. The running locus data registration unit 9 stores the running locus data storage unit 8
When the longitude and latitude of the current position have been written to the last address ADM, the current position output from the GPS receiving unit 2 is written back to the start address AD1. This allows
The running locus data storage unit 8 always registers running locus data in which the latest M current position data are arranged in chronological order.

(2) Route Search After that, when the user wants to travel along a route optimal from a desired departure point to a desired destination in distance, the operation unit 4 uses the latitude and longitude coordinates of the departure point and the history of the destination. Enter the degree coordinates. Then, the guidance route data acquisition processing unit 12 stores the latitude and longitude coordinates of the departure place and the latitude and longitude coordinates of the destination internally (steps S20 and S21 in FIG. 5), and then controls the communication unit 5 to display an external map. The support device 30 is requested to search for a route from the departure place to the destination (step S22). The communication unit 5 receives the latitude and longitude coordinates of the departure place and the destination and latitude and longitude coordinates of the destination from the guidance route data acquisition processing unit 12, and connects to the Internet 20 by wireless communication, and a map display support device existing on the Internet 20. A route search request signal including the latitude and longitude coordinates of the departure place and the longitude and latitude coordinates of the destination is transmitted to 30.

Upon receiving the route search request signal, the distribution unit 33 of the map display support device 30 provides the route search unit 32 with the latitude and longitude coordinates of the departure place and the destination and performs the route search. The route search unit 32 uses the road data in the map information storage unit 31 to search for the shortest optimal route connecting the departure place and the destination, and searches for the shortest optimal route from the departure place to the destination that constitutes the searched optimal route. The optimal route data in which the longitude and latitude of the node sequence between the two and the latitude and longitude of the departure point and the destination are arranged in order from the departure point to the destination is output to the distribution unit 33. To the navigation map display device 1 as guidance route data. When receiving the guidance route data, the communication unit 5 outputs the guidance route data to the guidance route data acquisition processing unit 12, and the guidance route data acquisition processing unit 12 stores the guidance route data in the guidance route data storage unit 10 (step S23). Here, the guidance route data excludes the origin and destination (Y-2).
(See FIG. 3 (1)), and the guidance route is shown in FIG.
It assumed to be a sign GR _0. After storing the guidance route data in the guidance route data storage unit 10, the guidance route data acquisition processing unit 12 automatically turns on the route guidance mode (step S24).

(3) Drawing and Display of Map Image While the Route Guidance Mode is On The traveling locus data registration unit 9 continues the registration processing of the traveling locus data irrespective of whether the route guidance mode is on or off (see FIG. 4). Steps S10 and S11). The drawing unit 15 is based on the data of the current position and the current azimuth output from the GPS receiving unit 2 and uses a map data in the map data storage unit 6 to map a predetermined scale map image with the current position as the center and the north facing upward. Is drawn in the image memory unit 14 (step S12). Subsequently, it is checked whether the route guidance mode is on (step S1).
3) Since the answer is YES here, the guidance route data storage unit 10
Is read out of the guidance route data stored in the area of the map image drawn in the image memory unit 14, and the highlighted guidance route highlighted in red and thick using the read route guidance data is used as the map image. The image is drawn so as to overlap the corresponding portion on the upper side (step S14). Further, the image memory unit 1
The current position mark is drawn in the direction corresponding to the current direction at the center of the map image drawn in Step 4 (Step S15). The map image and the current position mark drawn in the image memory unit 14 are read out by the video conversion unit 16 and converted into a predetermined video signal, output to the display unit 3, and displayed on the screen 3a as shown in FIG. The map image AR ′ is the enhanced guidance route GR ₀ ′.
And the current position mark PD '(step S16). Thereby, the user can travel while checking the current position and the optimal route to reach the desired destination on the map.

After step S16, the process returns to step S10, waits for the next data of the current position and the current azimuth to be output from the GPS receiver 2, and when the data is output, the running locus data registration unit 9 stores the running locus data. The latitude and longitude coordinates of the current position are written to the address next to the unit 8, and the drawing unit 15 uses the map data in the map data storage unit 6 to center the current position on the basis of the data of the current position and the current azimuth. Is drawn together with the enhanced guidance route and the current position mark. The map image and the current position mark drawn in the image memory unit 14 are stored in the video conversion unit 16.
And converted into a predetermined video signal, output to the display unit 3 and displayed on the screen (steps S11 to S1).
6). Hereinafter, the same processing is repeated, and the user can confirm the current position and the guidance route on the map. The current position detected by the GPS receiver 2 changes as the vehicle moves, and the map image on the screen also moves integrally with the enhanced guidance route.

(4) Automatic Re-Route Search Following Departure of the Route When the route guidance mode is on, the guidance route departure determination unit 11 stores the current position output from the GPS receiver 2 in the guidance stored in the guidance route data storage unit 10. compared with the route data, and the current position, distance to the closest point on the guidance route from the current position is checked spaced a predetermined fixed distance L ₀ or more (step S25 in FIG. 5). If the vehicle is traveling on the guidance route and the determination is NO, the guidance route data acquisition processing unit 12 subsequently checks whether or not an instruction operation for re-searching for the optimal route has been performed on the operation unit 4 (step S26). But N
If O, the processing of steps S25 and S26 is repeated.

[0020] Then, the vehicle is as shown in FIG. 6, deviated from the guide route GR ₀ ride within the road RD _a, in chronological order the current position data detected by the GPS receiver section 2, ·
·, _Pi-6 , _Pi-5 , _Pi-4 , _Pi-3 , P
When the _{i-2, P i-1} and continue to change, deviates from any screen 3a 'is guided route GR _0' current position mark PD, no longer know or say When you reach in any direction to reach the destination (See FIG. 7 (2)). At this time, GP
When the latest current position data P _i is output from the S receiving unit 2 and the distance L between the current position P _i and the point H on the nearest guidance route from the current position becomes L ₀ or more, the guidance route The departure determination unit 11 determines that the vehicle has deviated from the guidance route, and YES is determined in step S25. Then, the guidance route data acquisition processing unit 12 controls the communication unit 5 to make the external map display support device 30 request a reroute search from the current position to the destination (step S26). At this time, the guidance route data acquisition processing unit 12 stores the latest traveling locus data (the current position data P in chronological order) stored in the traveling locus data storage unit 8.
_{i−M + 1} ,..., P _i−6 , P _i−5 , P _i−4 , P
_i-3 , P _i-2 , P _i-1 , P _i ) and the longitude and latitude coordinates of the destination are given to the communication unit 5, and the communication unit 5 sends the latest traveling locus data from the guidance route data acquisition processing unit 12 to the communication unit 5. Receiving the latitude and longitude coordinates of the destination, connecting to the Internet 20 by wireless communication, and re-routing including the latest travel locus data and the latitude and longitude coordinates of the destination to the map display support device 30 existing on the Internet 20. Send a search request signal.

When the distribution section 33 of the map display support apparatus 30 receives the reroute search request signal, the distribution section 33 gives the latest travel locus data and the coordinates of the destination to the route search section 32 to perform the reroute search. Using the road data in the map information storage unit 31, the route search unit 32 first performs map matching by the pattern matching method based on the latest travel locus data, and determines the latest current position P _i on the road with the highest existence probability. The corrected current position P _i ′ corrected on RD _c is obtained (FIG. 6).
reference). Subsequently, using the road data, the shortest optimal route connecting the corrected current position P _i ′ to the destination is searched for, and the distance between the current position P _i ′ constituting the searched optimum route and the destination is determined. The optimal route data in which the longitude and latitude of the node sequence, the current position P _i ′, and the longitude and latitude of the destination are arranged in order from the current position P _i ′ to the destination are output to the distribution unit 33, and the distribution unit 3
3 transmits the re-searched optimal route data as guidance route data to the requesting vehicle-mounted map display device 1 via the Internet 20. Upon receiving the guide route data, the communication unit 5 of the requesting vehicle-mounted map display device 1 outputs the guide route data to the guide route data acquisition processing unit 12, and the guide route data acquisition processing unit 12 stores the guide route data in the guide route data storage unit 10. (Step S28). Here, the re-searched guidance route data includes (X-2) nodes excluding the current position P _i 'and the destination (see FIG. 3 (2)), and the re-searched guidance route is indicated by a symbol GR in FIG. _Assume that it becomes ₁ . Frontmost portion of the guide route GR ₁ rests on the road RD _c.

(5) Drawing and display of map image after re-searching Even after the re-searching, the map display control unit 13 uses the map data storage unit 6 based on the current position and current direction data output from the GPS receiving unit 2. Using the map data, a map image of a predetermined scale with the current position as the center and the north facing upward is drawn in the image memory unit 14 (step S12). Since the route guidance mode is ON, a part of the newly stored route guidance data stored in the guidance route data storage unit 10 that is included in the area of the map image drawn in the image memory unit 14 is read, and the read route guidance data is read out. Is used to draw the emphasis guidance route highlighted in red and thick on the corresponding location on the map image (step S14). Further, a current position mark is drawn at the center of the map image drawn in the image memory unit 14 in a direction corresponding to the current direction (step S15). The map image and the current position mark drawn in the image memory unit 14 are read out by the video conversion unit 16 and converted into a predetermined video signal, output to the display unit 3 and displayed on the screen (step S).
16). As shown in FIG. 7 (3), on the screen 3a 're searched emphasis guide route GR 1 _over' and the current position mark PD 'is displayed map image AR. As a result, the user can run while confirming the optimal route to reach the destination again. In addition, since most front part of the guide route GR ₁ was re-search is riding on top of the road RD _c of properly running, it can be directed to the destination without a wrong way. Regarding this point, if the current position P _i is not corrected on the road by map matching before the route search unit 32 on the side of the map display support device 30 performs a re-search, the starting point of the re-search is the current position. the nearest intersection to P _i (CP shown in FIG. 6
Although are referenced) differs from the frontmost portion of the re-searched guide route and the traveling road road (see RD _b in FIG. 6)
In this case, the wrong guidance route is displayed on the screen.

(6) Reroute Search at an Arbitrary Location While the route guidance mode is on, a reroute search can be manually requested even immediately after it is determined that the user has entered a road deviating from the guidance route. That is, when an instruction operation for re-searching the optimum route is performed by the operation unit 4, the guidance route data acquisition processing unit 1
No. 2 determines YES in step S26. Then, the communication unit 5 is controlled so that the external map display support device 30 requests a re-route search from the current position to the destination (step S).
27). At this time, the guidance route data acquisition processing unit 12 gives the latest traveling locus data (current position data in chronological order) stored in the traveling locus data storage unit 8 and the longitude and latitude coordinates of the destination to the communication unit 5 and performs communication. The unit 5 receives the latest travel trajectory data and the coordinates of the destination from the guidance route data acquisition processing unit 12, and connects to the Internet 20 by wireless communication, and sends it to the map display support device 30 existing on the Internet 20. In response, a re-route search request signal including the latest travel locus data and the coordinates of the destination is transmitted.

When the distribution section 33 of the map display support apparatus 30 receives the reroute search request signal, the distribution section 33 gives the latest travel locus data and the coordinates of the destination to the route search section 32 to perform the reroute search. Using the road data in the map information storage unit 31, the route search unit 32 first performs map matching by the pattern matching method based on the latest travel locus data, and places the latest current position on the road with the highest existence probability. Find the corrected current position. Subsequently, using the road data, a search is made for the shortest optimal route connecting the corrected current position to the destination, and the longitude and latitude of the node train between the corrected current position and the destination configuring the searched optimal route are determined. The optimal route data in which the corrected current position and the longitude and latitude of the destination are arranged in order from the corrected current position to the destination are output to the distribution unit 33, and the distribution unit 33 sends the route data to the requesting vehicle-mounted map display device 1 via the Internet 20. The re-searched optimal route data is transmitted as guidance route data. Upon receiving the guide route data, the communication unit 5 of the requesting vehicle-mounted map display device 1 outputs the guide route data to the guide route data acquisition processing unit 12, and the guide route data acquisition processing unit 12 stores the guide route data in the guide route data storage unit 10. (Step S28). As a result, the user can travel while confirming the optimal route to reach the destination again. In addition, since the foremost part of the re-searched guidance route is correctly on the road on which the vehicle is traveling, it is possible to go to the destination without making a mistake in the road.

According to this embodiment, when the vehicle-mounted map display device 1 deviates from the guidance route while traveling in the route guidance mode, the optimal route connecting the current position to the destination is automatically or manually instructed. Is requested to the map display support device 30 installed on the external network 20 by wireless communication, and the route display data re-searched by the map display support device 30 by using the road data indicating the road configuration is used. It is received via the network 20 and stored in the guidance route data storage unit 10. Then, using the re-searched guidance route data, the guidance route is superimposed on the map image and displayed on the screen together with the current position mark. Therefore, even if the in-vehicle map display device 1 is not equipped with the road data indicating the road configuration, when the vehicle deviates from the guidance route, traveling guidance can be provided to the user on a new guidance route connecting the current position to the destination. . In addition, since the foremost part of the re-searched guidance route is correctly on the road on which the vehicle is traveling, it is possible to go to the destination without making a mistake in the road.

In the above-described embodiment, it has been described that the map data for map drawing is stored in the map data storage unit in advance. Map data necessary for drawing an image may be obtained by communication and stored in the map data storage unit. Further, instead of detecting the current position and the current azimuth by satellite navigation, it may be detected by dead reckoning navigation. Further, the in-vehicle map display device may be both portable and portable.

[0027]

According to the present invention, even if the on-vehicle map display device is not equipped with the road data indicating the road configuration, a new guidance for connecting the current position to the destination when deviating from the guidance route is provided. Travel guidance to the user can be provided along the route. In addition, since the starting point of the re-search can be corrected on the road based on the latest travel locus data, the foremost part of the re-searched guidance route is correctly on the running road, without mistake You can head to your destination.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a map display system according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram of storage contents of a traveling locus data storage unit in FIG. 1;

FIG. 3 is an explanatory diagram of storage contents of a guidance route data storage unit in FIG. 1;

FIG. 4 is a flowchart showing a control process of a main unit in FIG. 1;

FIG. 5 is a flowchart showing a control process of a main unit in FIG. 1;

FIG. 6 is an explanatory diagram of a reroute search method when the vehicle deviates from a guidance route.

FIG. 7 is an explanatory diagram of a screen display example of a display unit in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 In-vehicle map display apparatus 2 GPS receiving part 3 Display part 4 Operation part 5 Communication part 6 Map data storage part 7 Main body part 8 Travel locus data storage part 9 Travel locus data registration part 10 Guide route data storage part 11 Guide route departure judgment Unit 12 Guide route data acquisition processing unit 13 Map display control unit 14 Image memory unit 15 Drawing unit 16 Video conversion unit 20 Internet 30 Map display support device 31 Map information storage unit 32 Route search unit 33 Distribution unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09B 29/10 G09B 29/10 A F-term (Reference) 2C032 HB02 HB05 HB22 HB25 HB31 HC08 HC13 HD03 HD16 2F029 AA01 AB07 AB13 AC02 AC14 AD01 5B075 ND20 PQ05 PQ22 PQ69 UU16 5H180 AA01 BB05 CC12 FF05 FF22 FF33 FF35 FF37

Claims (6)

[Claims] 1. A current position detecting means for detecting a current position; a display means for displaying a map image together with a current position mark; a guidance route storage means for storing a guidance route from a departure place to a destination; Map display control means for drawing a map image of a certain range including the current position together with the current position mark and the guide route and displaying the map image on the display means; and determining means for determining whether the current position deviates from the guide route. When it is determined by the means that the current position has deviated from the guidance route, the destination data and the latest detected current position data or traveling locus data including the current position near the current position are transmitted to the map display support device via the network. Requests a route search by transmitting, receives new guidance route data from the current position to the destination transmitted from the map display support device, and records the guidance route. Vehicle map display apparatus characterized by comprising: a route search request means for storing the unit. 2. A map display support device comprising a road data storage means storing road data indicating a road configuration, a destination data, a current position data or a current position data. Route search means for searching for an optimal route from the current position to the destination based on travel locus data near the current position including the position, using road data stored in the road data storage means; When a route search is requested from the in-vehicle map display device via the network with destination data and the latest detected current position data or traveling locus data near the current position including the current position, the current position is transmitted to the route searching means. Search for the optimal route from the vehicle to the destination, and use the searched route data as guidance route data to the requesting in-vehicle map display device via the network. On the other hand, the on-vehicle map display device comprises: a current position detecting means for detecting a current position; a display means for displaying a map image together with a current position mark; and guidance from a departure place to a destination. Map display control means for drawing a map image of a certain range including the current position together with the current position mark and the guide route using the map data and displaying the map image on the display means, Means for determining whether the vehicle has deviated from the guidance route. If the determination means determines that the current position has deviated from the guidance route, the destination data and the latest detected current position data or the current position near the current position are included. The travel locus data is transmitted to the map display support device via the network to request a route search, and from the current position transmitted from the map display support device to the destination. Map display system which receives the new guidance route data, the route search request means for storing the guidance route storage means, further comprising a, wherein. 3. The route search means performs map matching using road data based on current position data sent from a certain external map display terminal or running trajectory data near the current position including the current position. 3. The map display system according to claim 2, wherein after the correction, the optimum route connecting the corrected current position and the destination is searched. 4. 4. A current position detecting means for detecting a current position; a display means for displaying a map image together with a current position mark; a guidance route storage means for storing a guidance route from a departure place to a destination; A map display control means for drawing a map image of a certain range including the current position together with the current position mark and the guide route and displaying the map image on the display means, an instruction means for instructing a re-search of the guide route, and an instruction means. When a re-search for the guidance route is instructed, the destination data and the latest detected current position data or traveling locus data including the current position in the vicinity of the current position are transmitted to the map display support device via the network, and the route is transmitted. Requesting a search, receiving new guidance route data from the current position to the destination transmitted from the map display support device, and storing the new guidance route data in the guidance route storage means. Vehicle map display apparatus characterized by comprising: a requesting unit. 5. A map display support device comprising a map display support device and a vehicle-mounted map display device, wherein the map display support device stores road data indicating a road configuration, destination data, current position data or current position data. Route search means for searching for an optimal route from the current position to the destination based on travel locus data near the current position including the position, using road data stored in the road data storage means; When a route search is requested from the in-vehicle map display device via the network with destination data and the latest detected current position data or traveling locus data near the current position including the current position, the current position is transmitted to the route searching means. Search for the optimal route from the vehicle to the destination, and use the searched route data as guidance route data to the requesting in-vehicle map display device via the network. On the other hand, the on-vehicle map display device comprises: a current position detecting means for detecting a current position; a display means for displaying a map image together with a current position mark; and guidance from a departure place to a destination. Map display control means for drawing a map image of a certain range including the current position together with the current position mark and the guide route using the map data and displaying the map image on the display means, using the map data; Instruction means for instructing a re-search of the destination, and when the re-search of the guidance route is instructed by the instruction means, the destination data and the latest detected current position data or traveling locus data including the current position in the vicinity of the current position are included. Requesting a route search by transmitting to the map display support device via the network, and transmitting new route data from the current position to the destination transmitted from the map display support device. Map display system for receiving a route search request means for storing the guidance route storage means, further comprising a, wherein. 6. A route search means performs map matching using road data based on current position data sent from a certain external map display terminal or running trajectory data near the current position including the current position. 6. The map display system according to claim 5, further comprising: searching for an optimal route connecting the corrected current position and the destination after correcting the target.