JPH0125008B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an in-vehicle map display device, in particular, a route or group of routes desired by a user such as a driver among a group of specific routes is selectively highlighted by user operation, and the route Alternatively, the present invention relates to a system in which the route name (National Highway No.

In an in-vehicle map display device that assists the driving of vehicles such as automobiles, a specific route (for example, National Route Generally, fixed pattern data is provided corresponding to the format of the map to be displayed, and within this pattern data, data regarding the name of a specific route is also provided in advance.

For this reason, it is difficult for drivers and other users to selectively identify and display the desired route or route group, and since the name of the route is displayed near a specific route, the display space for this route name is used to distinguish between other routes. There were gaps in some parts of the displayed route, and it could not be said that the system was providing sufficient driving guidance.

The present invention has been made in view of the above points,
The route or route group desired by the user among the specific route group is selectively highlighted by user operation, and when this highlighting is performed, the route name (National Route X, etc.) or route type of the route or route group is displayed. The purpose is to display names (national roads, expressways, railways, etc.) in predetermined areas to improve vehicle travel guidance.

Therefore, the in-vehicle map display device of the present invention has display means M for displaying at least a plurality of routes, as shown in FIG.
1, and a map data storage medium M in which information representing the route type, route name, and/or route type name is stored in advance for each route displayed on the display means M1.
2, and highlight display command input means M3 for issuing a highlight display command for each route and/or route type.
And, in response to the highlighting command from the input means M3,
highlighted route extraction means M4 for extracting a route or route group to be highlighted on the display means M1 based on the route type information stored in the map data storage medium M2; Emphasis display control means M5 for causing the display means M1 to highlight
Then, the route name or route type name corresponding to the highlighted route or route group is read from the map data storage medium M2, and the display means M1
A highlighted route name display control means M6 for displaying the route name in a predetermined display area of the route name.

Next, the present invention will be explained by giving an example and referring to the drawings.

FIG. 2 is a block diagram showing the overall configuration of this embodiment. In the figure, 11 is a direction detection device that detects the traveling direction of the vehicle, 12 is a distance sensor that detects the travel distance of the vehicle, and 13 is a command device operated by the driver etc. and equipped with at least a road key 14 and a type key 15. , 16 is CPU 17, ROM 18,
An electronic control circuit 21 consisting of a RAM 19, an I/O circuit section 20, etc. is a display controller that receives signals from the electronic control circuit 16 and displays a map on a display 22.

Here, the direction detection device 11 includes a ring-shaped permalloy core, an excitation coil, and two mutually orthogonal coils, and detects the X and Y components of the earth's magnetism according to the direction of travel of the vehicle based on the output voltages of these two coils. It is equipped with a direction sensor and an A/D converter that converts an analog signal detected by the direction sensor into a digital signal, and outputs a digital signal of the X and Y components of the earth's magnetic field according to the direction of travel of the vehicle.

The distance sensor 12 generates a pulse signal every unit distance traveled by the vehicle by indirectly detecting the rotation of the speedometer cable or the rotation of the output shaft of the transmission using a reed switch, magnetic sensing element, photoelectric conversion element, etc. It is.

The road key 14 and the type key 15 are operation keys operated by a driver or the like when processing the flowcharts shown in FIGS. 5 and 6, which will be described later, and correspond to the above-mentioned highlight display command input means M3. It is something to do.

The display controller 21 receives a signal from the electronic control circuit 16 and causes the display 22 to display a route map, etc. The display controller 21 controls the above-mentioned highlighted display control means M5 and highlighted route name display control means M6 together with the electronic control circuit 16. It has been realized. Furthermore, the electronic control circuit 16 includes the above-mentioned highlighted display route extraction means M.
It also functions as 4.

The display 22 is made of, for example, a cathode ray tube, liquid crystal, or LED, and displays a route map on the display screen using a video signal from the display controller 21, and corresponds to the above-mentioned display means M1.

The map data storage medium 2 is, for example, a ROM package in which map data consisting of a point information sequence 31, a route information sequence 32, and a service information sequence 33 is stored in advance as shown in FIG.

Here, the point information string 31 consists of point information 34-h (h is an integer from 1 to H) for each point constituting the route, and the point information 34-h is, for example, point number information 35-h, map coordinates X component information 36-
h, Y component information 37-h, and other information.

The route information column 32 includes route information 38-i for each route composing the map (i is an integer from 1 to I)
The route information 38-i includes, for example, route number information 39-i, route type information 40-i to which the route belongs, and a point number including point number information and route end information 42-i for each point constituting the route. It consists of information group 41-i.

The service information string 33 includes the route information 38-
It consists of service information 43-i provided corresponding to i, and the service information 43-i is made up of information such as route number information 39-i and route name information 44-i.

Further, the point number information 35-h is provided corresponding to each point number information of the point number information group 41-i, and the point number information 35-h is provided corresponding to the point number information of the point number information 35-h. Ingredient information 36-h, Y
The component information 37-h represents the point in spherical coordinates or orthogonal coordinates with a specific point on the map as the origin.

Further, the route type information 40-i indicates whether the route is a national highway, expressway, river, or railway, and has name presence/absence information indicating whether the route is a highlighted route. It is something.

Next, the processing of this embodiment performed by the above-described configuration will be explained along the flowcharts shown in FIGS. 4 to 6. Here, the flowchart shown in FIG. 4 is a control program that is processed when the ignition key is turned "ON", and the flowchart shown in FIG. 5 is a control program that is processed when the road key 14 is turned "ON". FIG. 6 shows a control program that is processed when the type key 15 is turned on.

First, in the control program shown in Fig. 4,
When the ignition key is turned ON, counter i and counter j are set to 1 in step 101, and counter k is set to 1 in step 102.
is set to "1".

Here, the value of counter i is the route information string 32
Corresponds to the rank of route information 38r-i in
The value of the counter j corresponds to the rank of the file Fj created by processing as described later, and the value of the counter k corresponds to the rank of information in the point number information group 41-i.

In the following step 103, the route information 38
-i (38-1 at this point) route number 39
-i, 39-1 and route type 40-i, 40-
1 is written to the file Fj (F1 at this point), and the process moves to the next step 104. file here
Fj stores information constituting one route that will ultimately be displayed on the display 22.

In step 104, the route information 3
Point number information group 41-i, 4 of 8-i, 38-1
The k-th information of 1-1 (at this point, the first point number information) is read, and in the following step 105, it is determined whether the route end information has been read.

At this point, since the first point number information has just been read, the determination is "NO" and the process moves to step 106.

In step 106, the X component information 36-h and the Y component information 37-h of the map coordinates of the point information 34-h corresponding to the point number information (first point number information) read in step 104, i.e. The map coordinates (X, Y) are read, and in the subsequent step 107, the point is displayed on the display 2 by processing as described below.
It is determined whether the point is within the display area No. 2 or not.

At step 107, the relevant point is displayed on display 22.
If it is determined that the point is within the display area, the process moves to step 108, where the map coordinates (X, Y) of the point are determined by processing as described later.
is converted into the display coordinates (x, y) of the display 22, and in the next step 109, the display coordinates (x, y) are converted to the display coordinates (x, y) of the display 22.
y) is written to file Fj (F1) and the step
Move to 110.

On the other hand, if it is determined in step 107 that the point is not within the display area of the display 22, the process directly proceeds to step 110, where the value of the counter k is incremented, and the processing in step 104 is performed. Return to

At step 104, counter k is set at step 110.
Since the value of has been incremented, the next information in the previously read point number information group 41-i, 41-1 (at this point, the second point number information) is read, and the steps are repeated in the same manner as above.
If the determination in step 105 is "NO" and the point is within the display area of the display 22, the display coordinates (x, y) of the point are written in file Fj (F1), and the point is displayed. If the point is not within the display area of the display 22, the process directly advances to step 110.

In this way, in step 104, the point number information group 41-i, the route end information 42-i of 41-1,
Until 42-1 is read, the determination in step 105 is "NO", and steps 104 and 104 are not executed.
The process of 110 will be repeated.

Therefore, steps 103 to 110 described above
In the process, the route number information 39- stored in the route information 38-1 as shown in FIG.
1 and route type information 40-1, display coordinates (x ₁₁ , y ₁₁ ), (x ₁₂ , y ₁₂ ), (x ₁₃ ,
y ₁₃ ), . . . file F1 will be created.

Next, in step 104, the route end information 42-i,
42-1 is read, it is judged as ``YES'' in step 105, and the process moves to step 111. In step 111, i is incremented (i=2 at this point), and in the following step 112, the file is incremented.
It is determined whether or not Fj (F1) is empty data, that is, whether information on display coordinates (x, y) is stored in file Fj (F1).

If it is determined in step 112 that file Fj is not empty data, then in step 113 file Fj is
The route is displayed on the display 22 based on the information stored in the route, the value of the counter j is incremented at step 114, and the process moves to step 115. On the other hand, if it is determined in step 112 that the file Fj is empty data, the step continues.
Move to 115.

At this point, the display coordinates (x ₁₁ ,
Since the information of y ₁₁ ), (x ₁₂ , y ₁₂ ), (x ₁₃ , y ₁₃ ), . Based on this, the route is displayed on the display 22, and the value of the counter j is incremented to j=2 in step 114.

Next, in step 115, it is determined whether the value of the counter i is greater than the number I of route information in the route information string 32, that is, whether all route information has been processed, and the value of the counter If it is determined that the number of pieces of route information is less than or equal to the number of pieces of route information, the process returns to step 102. On the other hand, if it is determined that the value of the counter i is greater than the number of pieces of route information I, the process moves to the subsequent step 116.

At this point, the first route information 38-1 has been processed and has just been set to i=2 in step 111, so the decision is "NO" in step 115 and the process returns to step 102. Become.

Next, when the process moves to step 102, the value of the counter k is set to "1" as before, and the process proceeds to the following step.
In the processing from step 103 to step 110, the file Fj (F2 at this time) is created based on the route information 38-i (38-2 at this time) as described above.

Then, in step 104, route end information 42-
i (42-2 at this point) is read, and when it is determined in step 105 that the route has ended, the value of counter i is incremented in step 111, and the file is incremented in steps 112 to 114. If information on display coordinates (x, y) is stored in Fj (F2), the route is displayed on the display and the value of counter j is incremented, while information on display coordinates is stored in file Fj (F2). If it is not stored, the process directly advances to the next step 115.

In step 115, the process continues in step 102 for all routes in the route information string 32 until the value of the counter i becomes larger than the number I of route information.
Until step 114 or step 102 or step 112 is processed, the determination will be "NO", and the step will not proceed as described above.
In steps 102 to 114 or steps 102 to 112, a file of a route having points within the display area of the display 22 is created, and the route is displayed on the display 22 based on the information in the file.

Next, step 102 to step 114 or step 102 is performed for all routes in the route information string 32.
When the processing from step 112 to step 112 is performed, a determination of "YES" is made at step 115 for the first time, and the process moves to the following step 116.

In step 116, a value 1 smaller than the value of counter j, that is, the number of created files j-1, is stored in register m, and in the following step 117, counter j is set to "1", and flag A and counter l are set. Each value is set to "0".

Here, flag A is used in the control program shown in FIGS. 5 and 6, which will be described later.
It indicates whether or not a highlighted route is included in the file created by the above-mentioned processing, and the counter l is used in the control program shown in FIG. This represents the route type to be displayed.

Next, in step 118, by searching the route type information 40-i, 40-1 stored in the file Fj (F1 at this point), it is determined whether the route in question is a highlighted route or not. If it is determined that the route is a highlighted route, the process moves to the next step 119, where the route name information of the route in question is read from the service information 33, and the process moves to the next step 120.

In step 120, the name corresponding to the route name information of the route read in step 119 is displayed on the display 22, and the following step
At step 121, the route in question on the route map displayed on the display 22 is highlighted, and the processing of this routine ends.

On the other hand, if it is determined in step 118 that the root of file Fj (F1) is not the highlighted route, the process moves to step 122, where the value of counter j is incremented (at this point, j=2). ), the process moves to the following step 123.

In step 123, it is determined whether the value of counter j is greater than the value of register m, and j≦m.
If it is determined that
On the other hand, if it is determined that j>m, the following steps
At step 124, flag A is set to "1" and the processing of this routine ends.

At this point, the value of counter j has just been set to "2" in step 112, so step
At step 123, it is determined that j<m, and the process returns to step 118, where it is determined whether or not the route of file F2 is the highlighted route.

If it is determined in step 118 that the route of file F2 is not the highlighted route,
As before, the value of counter j is incremented at step 122 (j=3), and step 123
It is determined whether the value of counter j is greater than the value of register m, and if it is determined that j≦m, the process returns to step 118, whereas if it is determined that j>m, the process continues. Flag A at step 124
is set to "1" and the processing of this routine ends.

In this way, when it is determined in step 118 that the root of file Fj is not the highlighted route, the counter j is always incremented in step 122, and in the following step 123, the value of counter j becomes greater than the value of register m. On the other hand, if it is determined in step 118 that the route of Fj is the highlighted route, steps 119 to 121 are executed, and the name of the route is displayed on the display 22. displayed and highlighted.

Here, the counter j performed in step 123
The process of determining whether the value of is greater than the value of register m is performed by determining in step 118 that the roots of all files (F1 to Fm) created in steps 102 to 115 are not highlighted routes. If the root of all files is not the highlighted route, the route name and the route will not be highlighted, flag A will only be set to "1", and this routine will continue. This will complete the process.

As explained above, in the control program shown in FIG. The file creation process is performed and the display 22
For route information having a point within the display area, create a file consisting of route number information, route type information, and point information within the display area, and display the route for each file on the display 22, Furthermore, by searching these files in the order in which they were created, the route name and emphasis are displayed for the route that is determined to be the highlighted route file first. If all the routes of F1 to file Fm are not highlighted routes, the highlighting process is not performed and the processing of this routine ends.

In the process of this routine, the file creation process for all route information in the route information string 32 is completed, and the display 22 immediately after it is determined in step 115 that the value of the counter i is greater than the number of route information. The screen becomes an image as shown in FIG. 8, for example, and each route of files F1 to F7 is displayed. Then for example F1
If the route of F2 is not the highlighted route, and the route of F2 is the highlighted route, the display screen of the display 22 will become an image as shown in Fig. 9 when the processing of this routine is completed, and the file
The F2 route is highlighted, and the route name "National Route Z1" is displayed in the name display area W. On the other hand, if all the routes in files F1 to F7 are not highlighted routes, a map as shown in FIG. 8 will be displayed as is.

Note that the highlighted display may be performed as long as the highlighted route can be distinguished from the general route, such as increasing the brightness of the route, blinking the route, widening the width of the route, etc. Alternatively, there may be a method of changing the color of the route.

Further, in step 107, the process of determining whether or not the point is within the display area of the display 22 is performed at the upper left end a and the right corner of the display area of the display 22, as shown in FIG. It is determined whether or not the point exists within a diagonally shaded area centered on the lower end b and surrounded by straight lines extending in the X direction and the Y direction, respectively, and the upper left end of the display area of the display 22. If the map coordinates of a are (X1, Y1), the map coordinates of the lower right corner b are (X2, Y2), and the point found in step 106 is (X, Y), then X≦X≦X1, Y1 Only when the condition ≦Y≦Y2 is satisfied, it is determined that the point is within the display area of the display 22.

Further, if the point is within the display area of the display 22, the display coordinate conversion process performed in step 108 is as shown in FIG. 11, which represents the display coordinate system with the map coordinates (X1, Y1) as the origin. , let the number of dots on the display screen of the display 22 be a and b, and the number of dots per unit longitude LDOT and the number of dots per unit latitude ADOT are expressed by the following formula LDOT=a/(X2-X1) ADOT=b/(Y1- Y2), and then the display coordinates (x, y) of the point are determined from the following formula: x=(X-X1)/LDOT y=(Y-Y1)/ADOT.

Next, when the road key 14 is turned ON, the processing of the control program shown in FIG. 5 is started, and first, in step 201, the counter 1 is set to "0". At this point, since the counter l has been set to "0" in step 117 of FIG. 5, no processing is performed and the process moves to the following step 202.

In step 202, the value of flag A is "1".
It is determined whether or not the flag is "1", and if flag A is "1", the process of this routine is finished, and if flag A is not "1", the step is skipped.
203, the currently highlighted route is changed to normal display and the "name" in the name display area W is erased.

Here, when flag A is "1", all files (F1 to F1) created in the control program shown in FIG.
This is the case when the route of Fm) is not a highlighted route and the image on the display 22 is as shown in FIG.

At this point, assuming that the image shown in FIG. 9 is displayed on the display 22 in the same way as above, the root of file F2 is changed to normal display, and the """"National Route Z1" will be deleted.

Next, in step 204, the value of counter j is incremented, and in the following step 205, the file
It is determined whether the route of Fj is a highlighted route. At this point, the root of file F2 has just been changed to normal display, and j=2, so j=3 is set in step 204, and step 204 is set to j=2.
At step 205, it is determined whether the route of file F3 is a highlighted route.

Step 206 follows when it is determined in step 205 that the route of file Fj is the highlighted route.
In steps 208 to 208, the same processing as that in steps 119 to 121 shown in FIG. 4 described above is performed, and step 206
reads the route name of the route of file Fj from the service information column 33, displays the route name on the display 22 in step 207, highlights and displays the name of the route in step 208, and then processes this routine. finish.

On the other hand, if it is determined in step 205 that the root of file Fj is not the highlighted route, the step
The process moves to step 209, and it is determined whether the value of counter j is greater than or equal to the value of register m. If the value of counter j is smaller than the value of register m, the process returns to step 204, while the value of counter j is If it is greater than or equal to the value of m, the process moves to step 210, where the value of counter j is set to "0", and the process returns to step 204.

Here, the process performed in step 209 is similar to the process in step 123 in FIG.
It is determined whether or not this is the last file Fm during file creation. Another step
The process performed at 210 is a process performed to return to the first file F1 after the last file Fm has been processed.

Suppose that among the files created in the file creation process shown in FIG. 4 above, only the root of file F2 is the highlighted route.
Processing of F3 or file Fm is performed repeatedly,
After that, in step 210, j=O is set, and the file is
When F1 is processed in the same way and file F2 is processed, a determination of "YES" is made in step 205 for the first time, and the root name and highlighted display of file F2 is performed in steps 206 to 208. As a result, the display screen of the display 22 becomes the same display screen as before the road key 14 was turned on.

On the other hand, if the route of file F3 is the highlighted route, the determination in step 205 is ``YES'', and the subsequent steps 206 to 208 are executed.
The F3 route is highlighted and its name is displayed, resulting in an image as shown in FIG. 12.

As explained above, in the control program shown in FIG. If there is a route that is displayed, the route is changed to normal display, the name display is deleted, the next route to be highlighted is extracted, and the route is highlighted and the name is displayed. becomes.

Next, when the type key 15 is turned on, the processing of the control program shown in FIG. 6 is started, and first, in step 301, it is determined whether or not flag A is "1". Similar to step 202 in FIG. 5, the process in this case also involves determining whether all the files (F1 to Fm) created by the control program in FIG. 4 are not highlighted routes, and the flag is flagged. If the flag A is set to "1", the processing of this routine is directly terminated, and if the flag A is not "1", the processing moves to the subsequent step 302.

In step 302, the value of the counter 1 is incremented, and in the next step 303, the currently highlighted route is changed to normal display and the name display is deleted.

At this point, the counter l is still set to 0, so in step 302 l is set to 1,
In the following step 303, the 12th
The highlighted display of the route of file F3 as shown in the figure is changed to normal display, and the name "National Route Z2" is deleted.

After that, the process moves to step 304, and the counter l
It is determined whether or not is "1". At that point, the counter 1 has just been set to "1" in step 302, so the determination in step 304 is "YES" and the process moves to the subsequent step 305.

In step 305, file F1 or file
Among the Fm routes, all those whose route type is national highway are highlighted, the name "national highway" is displayed in the name display area W, and the processing of this routine is completed.
The display screen of the display 22 at this time is the 13th
The screen will look like the one shown in the figure.

When the type key 15 is operated to "ON" again, the counter l is set to "2" in step 302, and in the following step 303, the route currently highlighted on the display 22 is changed to normal display and the name is displayed. "National Highway" displayed in area W is deleted, and the process moves to the next step 304.

At this point, it has just been determined that l = 2 in step 302, so the judgment in step 304 is "NO", and the process moves to the following step 306, where it is judged whether or not the value of the counter l is "2". It will be done.

In step 306, since it is immediately after l=2 as described above, it is determined as "YES", and in the following step 307, file F1 to file Fm is determined.
Among the routes, all routes whose route type is expressway are highlighted, and the name display area W
``Expressway'' is displayed, and the processing of this routine ends.

Note that if the routes of files F1 to Fm do not include an expressway, the route is not highlighted and only the route type in the name display area W is displayed, as shown in FIG.

Furthermore, when the type key 15 is operated to "ON", the counter l is set to "3", similar to the process described above, and if l = 3, the route type of river is highlighted in step 308. , the name "River" is displayed, and the processing of this routine ends.

Furthermore, when the type key 15 is turned ON, the counter l is set to "4", and the counter l is set to "1", "2",
Since it is not one of "3", in step 309, the route type is highlighted and the name "Railway" is displayed. Then, the process moves to step 310, and the value of the counter l is set to "0".

As mentioned above, in the processing of this routine, each time the type key 15 is turned "ON", the route type to be highlighted is changed.
Type key 15 after "Railway" is highlighted
When is turned ON, the display returns to highlighting "National Highway" again.

Next, step 305, step 307, step 308,
The highlighting of the route type and the route highlighting process performed in step 309 are performed in step 305.
will be explained in detail using FIG. 15 as an example.

When ``YES'' is determined in step 304 of the control program shown in FIG. 6, the value of counter j is set to ``1'' in step 401 shown in FIG. Then F1)
The route type of file Fj (F1) is read, and in the following step 403, it is determined whether the route of file Fj (F1) is a national highway based on the route type.

When it is determined in step 403 that Fj (F1) is a national highway, the route of Fj (F1) is highlighted in the following step 404, and the process moves to the next step 405.
On the other hand, if it is determined in step 403 that Fj (F1) is not a national highway, the process moves to step 405.

In step 405, it is determined whether the value of counter j is greater than or equal to the value of register m. At this point, j=1, so the determination is "NO", and the process moves to step 406, where counter j is The value of is incremented (j=2), and the process returns to step 402.

When the process returns to step 402, the root type of file Fj is read as before, but
At this point, since j=2, step 402
The route type of file F2 is read in, and then the same process as described above is performed depending on the route type.

File F1 or file created in this way by the control program shown in FIG.
The route type is read for each Fm route, and if the route type is a national highway, the process of highlighting that route is repeated.

When the above processing has been performed for all files, the determination in step 405 is ``YES'', the process moves to step 407, ``National Highway'' is displayed in the name display area W of the display 22, and the processing of this routine is completed. becomes.

In this way, in step 305 shown in FIG. 6, the route types are read for all files from file F1 to file Fm, and routes whose route type is national highway are highlighted.
Also, the name is displayed as "National Highway", but the steps 307, 308,
Similar processing is done at step 309, and step 307 selects "expressway" and step 308 selects "river".
In step 309, highlighting and name display processing is performed for each route type, such as "Railway."

As detailed above, in this embodiment, a specific route or specific route type can be highlighted and its name can also be displayed, and the highlighted route can be changed by simply operating the road key or type key. , the driver etc. can easily select the highlighted route they desire. In addition, when highlighting a specific route type, if there is no route of that route type on the map, only the name of the route type will be displayed, and the driver etc. You will be able to see at a glance that a map that does not exist is displayed.

Incidentally, in the above embodiment, the map data storage medium is composed of a ROM package, but
Floppy disks, magnetic tape, punch cards, etc. may also be used. However, in this case, it goes without saying that a reading device for reading the map data is required.

In addition, although the highlighted routes are national roads, expressways, rivers, and railways, it is also possible to highlight routes for other prefectural roads, city roads, town roads, etc., so that drivers can have more detailed information when selecting a specific route. A choice can be made.

As explained above, the gist of the present invention is to provide a display means for displaying at least a plurality of routes, and information representing the route type, route name, and/or route type name for each route displayed on the display means. a map data storage medium in which is stored in advance, a highlighting command input means for issuing a highlighting command for each route and/or each route type, and the above display in accordance with the highlighting command from the input means highlighting route extraction means for extracting a route or route group to be highlighted on the means based on route type information stored in the map data storage medium; and highlighting the extracted route or route group on the display means. a highlighted route name display that reads a route name or route type name corresponding to the highlighted route or route group from the map data storage medium and displays it in a predetermined display area of the display means; An in-vehicle map device comprising: a control means;

Therefore, according to the present invention, it is possible to selectively highlight a route or route group that the user desires from among a specific route group, and the route name or route type name is displayed in a predetermined display area. This can prevent the displayed map from becoming difficult to see due to gaps in other routes.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the present invention, FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 3 is a configuration diagram of map data stored in the map data storage medium 2 of this embodiment. , FIGS. 4 to 6 are flowcharts representing the control program of this embodiment,
7 to 11 are diagrams for explaining the processing of the control program shown in FIG. 4. FIG. 7 is a diagram showing files created in the processing of steps 101 to 115, and FIG. and FIG. 9 is a display pattern diagram displayed on the display 22, the first
Figure 0 is a diagram for explaining the process performed at step 107, Figure 11 is a diagram for explaining the process performed at step 108, and Figure 12 is a diagram for explaining the process performed by the control program shown in Figure 5. The display pattern diagrams displayed on the display 22, FIGS. 13 and 14, are the display pattern diagrams displayed on the display 22 through the processing of the control program shown in FIG.
FIG. 5 is a flowchart showing detailed processing performed at step 305 in FIG. M1...Display means, M2,2...Map data storage medium, M3...Highlight display command input means, M4...
... Highlighted display route extraction means, M5 ... Highlighted display control means, M6 ... Highlighted display route name display control means, 14 ... Road key, 15 ... Type key, 16
...Electronic control circuit, 21...Display controller,
22...Display, 31...Point information column, 3
2... Route information string, 33... Service information string.

Claims (1)

[Claims] 1. A display means for displaying at least a plurality of routes, and information representing a route type, a route name, and/or a route type name is stored in advance for each route displayed on the display means. a map data storage medium; a highlighting command input means for issuing a highlighting command for each route and/or each route type; highlighting route extraction means for extracting a desired route or route group based on route type information stored in the map data storage medium; and highlighting control means for highlighting the extracted route or route group on the display means. and highlighted route name display control means for reading a route name or route type name corresponding to the route or group of routes to be highlighted from the map data storage medium and displaying the same in a predetermined display area of the display means. An in-vehicle map display device comprising: