JP4971067B2 - Map display device - Google Patents

Description

  The present invention relates to a technique for easily displaying name information useful for a user when displaying map information.

  As a map display method in a conventional navigation device or the like, map data (background data, road data, name data, etc.) is read from a map data storage medium such as a map disk, and based on a predetermined drawing order, for example, Draw a background object using the background data, then draw a road object using the road data, and finally draw a name object using the name data to form a map image, and display the formed map image It was displayed on the device (see, for example, Patent Document 1).

  In such a navigation device, when displaying a map, from a general point of view, the name of a highly important facility, the name of a highly public facility, the name of a facility with many users, the location associated with the road The name is selected and displayed on the map. In other words, although the essential role of the car navigation system is to assist driving, the criteria for judging whether or not to display the information displayed there is named from the viewpoint of obtaining geographic information. It was almost the same as a general “map”.

In order to reduce the difference between the information that the user wants to obtain and the information that is actually displayed, the following various ideas have been made. That is, in the map display device described in Patent Document 2, a display priority table listing the priorities set for each facility is stored in advance in the storage means, and when the map image is generated, the display priority is displayed. The name of the facility with a high priority is drawn in the map image with reference to the degree table, and the map image is displayed (see, for example, Patent Document 2). Further, in the guidance device described in Patent Document 3, the shape of a building and the display of a road displayed on a map are mainly limited according to the vehicle speed (see, for example, Patent Document 3).
JP-A-6-331371 JP 2006-23495 A JP 2002-39780 A

However, the map display method described in Patent Document 1 has a problem that names of facilities and the like selected from a general viewpoint are not always useful information for the user.
Further, in the map display device described in Patent Document 2, a display priority table listing the priorities set for each facility is stored in the storage means in advance, so that the overlapping order is determined by the map producer's intention. Even if the name of the facility or the like selected from such a general viewpoint is displayed on the map, it is not necessarily useful information for the user.

  Further, in the guidance device described in Patent Document 3, the shape of the building and the road displayed on the map are mainly limited according to the vehicle speed, and the facility selected from such a general viewpoint Even if the name is displayed on the map, it is not necessarily useful information for the user.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a technique for easily displaying name information useful for a user when displaying map information. .

  The map display device according to claim 1, which has been made to solve the above problem, is “suitable for a vehicle situation from a plurality of priority tables in which priority is set for each type of name information when the vehicle situation changes. The name information having a high priority of the type is preferentially displayed on the basis of the selected priority table ”.

Specifically, the map display device described above (100: In this column, in order to facilitate understanding of the invention, the reference numeral used in the “Best Mode for Carrying Out the Invention” column is attached as necessary. , Does not mean that the scope of claims is limited by this code.), The map information acquisition means (6) can acquire map information including name information, and display means (10a, 10b). However, a part of the map information acquired by the map information acquisition means can be displayed. And a display control means (8) displays a part of map information which the map information acquisition means acquired on a display means. The priority table storage means (8) stores the priority table. In addition, this priority table displays the name information to be preferentially displayed according to a specific rule for each type when a plurality of name information overlaps on the map when the display means displays a part of the map information. This is a ranked table. Further, the vehicle status determination means (8) determines the status of the vehicle on which the map information device is mounted, and the selection means (8) is a priority table suitable for the vehicle status determined by the vehicle status determination means. Is selected from the priority table stored in the priority table storage means. The priority table stored by the priority table storage means includes a priority table suitable for guidance and a priority table suitable for non-guidance, and the vehicle status determination means is a part of the vehicle status. When the guidance means or the non-guidance time is determined, and the selection means selects a priority table suitable for the vehicle situation determined by the vehicle situation determination means from the priority table stored in the priority table storage means. Selects a priority table having a higher coefficient value assigned to the priority table, and when there are a plurality of priority tables selected at this time, the plurality of priority tables are combined to create a new one. Generate and use a priority table. And according to the priority for each type of each name information set in the priority table selected by the selection means , the display control means hides the name information whose priority is lower than a predetermined order, By displaying the name information whose priority of the type is equal to or higher than a predetermined order, the name information having a high priority of the type is displayed preferentially. Further, when the display means displays a part of the map information, the determination means determines whether or not the plurality of name information overlaps, and when the display means displays a part of the map information, the plurality of name information When it is determined by the determining means that they overlap each other, the display control means determines the type of the plurality of overlapping name information according to the priority for each type of name information set in the priority table selected by the selecting means. Name information with a lower priority than the other is not displayed, and among the overlapping name information, the name information with a higher priority of the type than the other is displayed at that position. Eliminate the overlap.

  According to the map information device of the present invention configured as described above, according to the priority for each type of name information defined in the selected priority table, the name information having a higher priority for that type is given priority. Display. Thus, when displaying a map, name information useful for the user can be easily displayed.

  Specific examples of the name information include place names, terrain names, and facility names. In addition, specific examples of changes in the situation of the vehicle described above include when a route is set, when entering an expressway or a toll road, when a continuous driving time exceeds a predetermined time, from a point such as a sightseeing spot When entering an area within a predetermined distance.

  In addition, as the above-described priority table, it is conceivable to prepare tables characterized according to types by users such as housewives, seniors, and young people. Moreover, you may prepare each the priority table characterized according to the classification | category by the driving purpose of the user, such as at the time of holiday use or commuting use. Furthermore, a priority table characterized according to the type of road such as a general road, a narrow street, an expressway, and a toll road may be prepared.

Further, as a method to eliminate the overlap of the plurality of name information displayed, since priority is to hide the lower name information, to eliminate the overlap of the above by not displayed not beneficial name information for the user Therefore, it is possible to easily confirm name information useful for the user.

Further , when the selection means selects from the priority table stored in the priority table storage means the priority table suitable for the vehicle situation determined by the vehicle situation determination means, the priority table is attached to each priority table. since the value of the coefficient to select a more higher, it is possible to select a priority table conforming to the preference of the user, thus, it is possible to easily confirm the beneficial name information to the user.

In addition , when there are a plurality of selection candidates, the priority table is synthesized and a new priority table is generated and used, so that a priority table more suitable for the user's preference can be generated, Therefore, it is possible to easily confirm name information useful for the user.

Further, since the priority is to hide the lower name information than predetermined rank can be so as not to display the not beneficial name information to the user, thus easier to see beneficial name information for the user be able to. In addition, the processing load on the display control unit can be reduced, and the processing time of the display control unit can be shortened. Therefore, the time for the user to wait until the display is completed is shortened, and the convenience for the user is improved. Can do.

Embodiments of the present invention will be described below with reference to the drawings.
[First embodiment]
FIG. 1 is a schematic configuration diagram of a navigation device 100 having a map display function. 2A is an explanatory diagram (1) showing a display example by the display device 10a of the navigation device 100, and FIG. 2B is an explanatory diagram (2) showing a display example by the display device 10a of the navigation device 100. ). FIG. 4A is an explanatory diagram showing a display priority table when not guiding, and FIG. 4B is a display example of a map created according to the display priority table when not guiding. FIG. 5A is an explanatory diagram showing a display priority table at the time of guidance, and FIG. 5B is a display example of a map created according to the display priority table at the time of guidance.

[Description of Configuration of Navigation Device 100]
The navigation device 100 includes a position detector 1, a map data input device 6, an external storage medium 7, a display device 10a, an operation switch group 11, a remote control sensor 12, and a control device 8 that controls these in an integrated manner. Note that a rear seat display device 10b may be provided as necessary.

  The control device 8 includes a current position detection unit 8a, a map data storage unit 8b, a mark spot data storage unit 8c, a data processing unit 8d, and the like. The control device 8 is configured as a normal computer, and includes a known CPU, ROM, RAM, I / O, a bus line for connecting these configurations, and the like.

  Further, the control device 8 stores various display priority tables as exemplified in FIG. 4A and FIG. In the display priority table, when the display device 10a displays a part of map information, when a plurality of name data (name information) overlap on the map, the name data to be displayed with priority is displayed for each type. It is a table ranked according to specific rules. In these display priority tables, records in which priorities are associated with types of name data as elements are registered, and a threshold value B for switching between display and non-display is set. As the display priority table, for example, during non-guidance (see FIG. 4 (a)) or during guidance (see FIGS. 5 (a) and 10 (b)) so as to meet various needs of the user. Characterized according to the type according to the driving purpose of the user, such as during holiday use or commuting use, a table characterized according to the type by the user such as housewives, seniors (see Fig. 10 (a)), young people And tables characterized according to the type of road, such as general roads, narrow streets, expressways, and toll roads. Further, when the name data is displayed on the map according to the non-guided display priority table illustrated in FIG. 4A, a display example shown in FIG. 4B is obtained. Further, when the name data is displayed on the map according to the guidance display priority table illustrated in FIG. 5A, the display example is as shown in FIG. 5B.

The control device 8 corresponds to display control means, priority table storage means, vehicle status determination means, selection means, and determination means.
Each of the position detectors 1 has a known gyroscope 2, a geomagnetic sensor 3, a vehicle speed sensor 4, and a GPS receiver 5 for GPS (Global Positioning System) that detects the vehicle position and the current date and time by means of satellite radio waves. is doing. Using these outputs, the current position detection means 8d can calculate the current position and traveling direction of the vehicle. Since these sensors 2, 3, 4, 5 have errors of different properties, they are configured to be used while being interpolated by a plurality of sensors. Depending on the accuracy, a part of the above may be used, and a steering rotation sensor, a wheel sensor of each rolling wheel, or the like may be used.

  The map data input device 6 is a device for inputting various data including map data, so-called map matching data for improving position detection accuracy, route guidance data, mark point data, and the like to the control device 8. The map data includes node data, link data, cost data, background data, road data, name data (name information), mark data, intersection data, facility data, and the like. Specific examples of the name data include place names, topographic names, and facility names.

  Various data input from the map data input device 6 to the control device 8 are stored in the map data storage means 8b, the mark spot data storage means 8c, the guide data storage means 8d, and processed by the data processing means 8e. Used. However, the data held in the means 8b, 8c, and 8d may be given as ROM data in the control device 8, or may be acquired from the map data input device 6 as necessary. In particular, in the navigation device 100, it is assumed that each mark point data has a guide target radius distance R as a guide execution distance condition determination parameter.

The map data input device 6 corresponds to map information acquisition means.
As the external storage medium 7 used in the map data input device 6, a DVD-ROM or CD-ROM is generally used because of the large amount of data used for navigation. However, in addition to the above, a magnetic recording device such as an HDD or a medium such as a memory card may be used.

  The display device 10a and the rear seat display device 10b are color display devices. In addition to the map data input from the map data input device 6, the vehicle current input from the position detector 1 is displayed on the screen of these display devices. Marks for displaying positions, mark data selected by the user for displaying various facilities and points as marks, additional data such as guidance routes displayed on the map, name data, etc. can be displayed in an overlapping manner I can do it.

The display device 10a and the rear seat display device 10b correspond to display means.
Further, when the navigation apparatus 100 inputs the position of the destination from the operation switch group 11 or from the remote control sensor 12 via the remote control terminal (hereinafter referred to as a remote controller) 13, the navigation apparatus 100 is optimal from the current position to the destination. It has a so-called route guidance function that automatically selects a route to form a guidance route and guides the vehicle to a destination by outputting a guidance voice and displaying a guidance image. For example, a touch switch or a mechanical switch integrated with the display device 10 is used as the operation switch group 11 and is used for various inputs.

[Description of map display processing]
Next, map display processing executed by the control device 8 of the navigation device 100 will be described with reference to the flowchart of FIG.

  This map display process is a process executed by the control device 8 when the ignition key is operated by the driver to enter the accessory power supply (ACC) state and the navigation device 100 is turned on. .

  First, a normal map is drawn (S110, see FIG. 2A). Specifically, a part of the map data (for example, an area centered on the current position of the vehicle) input by the map data input device 6 is displayed on the display device 10a and the rear seat display device 10b.

  Subsequently, it is determined whether there is a signal for instructing to change the display priority table (S120). Specifically, the control device 8 determines the state of the vehicle on which the navigation device 100 is mounted, and determines whether or not the vehicle state has changed. In addition, specific examples of changes in the vehicle situation include when a route is set, when entering a highway or a toll road, when a continuous driving time exceeds a predetermined time, or when a predetermined distance from a point such as a sightseeing spot It is possible to enter the area. At this time, when it is determined that the situation of the vehicle has changed, a signal to instruct the change of the display priority table is output.

  Here, if it is determined that there is no signal for instructing to change the display priority table (S120: No), it is considered that the vehicle status has not changed, and the process returns to S110. On the other hand, when it is determined that there is a signal for instructing to change the display priority table (S120: Yes), it is determined that the vehicle status has changed. Subsequently, the display priority table is changed to a display priority table corresponding to the signal for instructing the change of the display priority table (S130). Specifically, the display priority table corresponding to the above signal is selected from the display priority table stored in the control device 8. At this time, the higher coefficient value assigned to each display priority table is selected.

  Subsequently, in accordance with the priority for each type of name data defined in the changed display priority table, name data having a higher priority for that type is preferentially displayed. Specifically, first, the value of the set value A is set to a numerical value “1” (S140). Subsequently, name data in which the priority of the type in the display priority table is the same as the set value A is drawn in the VRAM (S150). Here, the threshold value B for switching between display and non-display set for each display priority table is compared with the set value A (S160). When the value of the set value A is smaller than the value of the threshold value B (A <B), the numerical value “1” is added to the set value A (S190), and the process returns to S150. On the other hand, if the set value A is equal to or greater than the threshold value B (A> = B), an overlap avoidance process is executed (S170). The overlap avoidance process will be described later. Then, the VRAM after executing the overlap avoidance process is actually displayed on the display device 10a (S180, see FIG. 2B). Then, the process returns to S110.

[Description of Overlap Avoidance Processing (1)]
Next, the overlap avoidance process (1) executed by the control device 8 of the navigation device 100 will be described with reference to the flowchart of FIG.

This overlap avoidance process (1) is a subroutine of the map display process described above, and is a process executed by the control device 8 when the process proceeds to S170 during the execution of the map display process.
First, name data having a type priority “1” in the display priority table is drawn in the VRAM (S205).

  Subsequently, overlap between priority 1 and priority 2 is avoided. That is, name data whose type priority in the display priority table is a numerical value “2” is drawn in the VRAM (S210), and it is determined whether or not the name data overlap on the VRAM (S215). If it is determined that the name data does not overlap on the VRAM (S215: None), the process proceeds to S220 described later. On the other hand, when it is determined that the name data overlap each other on the VRAM (S215: Yes, refer to FIG. 11A), the priority of the overlapping name data is compared (S240). If the reference name data of priority 2 overlaps with the name data of priority 1 (S240: overlaps with priority 1), “name data of priority 2”, which is inferior in priority, is designated as the name of priority 1. Move away from the data by a predetermined distance (corresponding to the distance “1” in FIG. 7) in the X-axis direction and Y-axis direction on the map (see S255, FIG. 7), and return to S215. On the other hand, when the name data of priority 2 as a reference overlaps with other name data of priority 2 (S240: overlaps with priority 2), the priority is the same, so each name data on the map The distance between the position and the vehicle position is compared (S245). If the reference priority level 2 name data is farther from the vehicle position than other priority level 2 name data (S245: far), the reference priority level 2 name data is moved ( S255), the process returns to S215. On the other hand, if the reference priority level 2 name data is closer to the vehicle position than the other priority level 2 name data (S245: close), the process returns to S240 and the reference priority level 2 name is returned. Change the data. Such overlap avoidance processing is repeatedly executed until the overlap of name data is eliminated.

  Subsequently, overlap between priority 2 and priority 3 is avoided. That is, the name data whose type priority in the display priority table is the numerical value “3” is drawn on the VRAM (S220), and it is determined whether the name data overlap on the VRAM (S225). If it is determined that the name data does not overlap on the VRAM (S225: None), the process proceeds to S230 described later. On the other hand, when it is determined that the name data overlap each other on the VRAM (S225: Yes, refer to FIG. 11A), the priority of the overlapping name data is compared (S260). If the reference priority level 3 name data overlaps with the priority level 2 name data (S260: overlaps with the priority level 2), the priority level “name 3 priority data” is inferior in priority level. Move away from the data by a predetermined distance (corresponding to the distance “1” in FIG. 7) in the X-axis direction and the Y-axis direction on the map (S270), and return to S225. On the other hand, if the reference priority level 3 name data overlaps with other priority level 3 name data (S260: overlaps with priority level 3), the priority levels are the same, so each name data on the map The distance between the position and the vehicle position is compared (S265). If the reference priority 3 name data is farther from the vehicle position than the other priority 3 name data (S265: distant), the reference priority 3 name data is moved ( S270), the process returns to S225. On the other hand, if the reference priority 3 name data is closer to the vehicle position than the other priority 3 name data (S265: close), the process returns to S260, and the reference priority 3 name. Change the data. Such overlap avoidance processing is repeatedly executed until the overlap of name data is eliminated.

  Subsequently, overlap between priority 3 and priority 4 is avoided. That is, name data whose type priority is “4” in the display priority table is drawn on the VRAM (S230), and it is determined whether or not the name data overlap on the VRAM (S235). When it is determined that the name data overlap each other on the VRAM (S235: Yes, refer to FIG. 11A), the priority of the overlapping name data is compared (S275). If the reference priority level 4 name data overlaps with the priority level 3 name data (S275: overlaps with the priority level 3), the “priority level 4 name data” which is inferior in priority is set to non-display ( S285), the process returns to S235. On the other hand, when the name data of priority 4 as a reference overlaps with name data of other priorities 4 (S275: overlaps with priority 4), since the priorities are the same, each name data on the map The distance between the position and the vehicle position is compared (S280). If the reference priority 4 name data is farther from the vehicle position than the other priority 4 name data (S280: distant), the reference priority 4 name data is moved ( S270), the process returns to S235. On the other hand, if the reference priority 4 name data is closer to the vehicle position than the other priority 4 name data (S280: close), the process returns to S275, and the reference priority 4 name. Change the data. It should be noted that such overlap avoidance processing is repeatedly executed until the overlap is eliminated, and when it is determined that the name data does not overlap on the VRAM (S235: none), priority 4 and priority 5 The process is repeatedly executed until the priority value becomes equal to the threshold value. When the priority value becomes equal to the threshold value B, this subroutine is terminated.

[Description of Overlap Avoidance Processing (2)]
Next, the overlap avoidance process (2) executed by the control device 8 of the navigation device 100 will be described with reference to the flowchart of FIG.

  This overlap avoidance process (2) is a subroutine of the above-described map display process. When the process proceeds to S170 during the execution of the map display process, the control device 8 performs the overlap avoidance process (1) in parallel with the above-described overlap avoidance process (1). It is a process to be executed.

  First, a two-step detailed map is drawn on the VRAM for an area centering on the location where the name data on the map overlaps (S310), and it is determined whether the name data overlaps on the VRAM (S320). When it is determined that the name data overlap each other on the VRAM (S320: Yes, refer to FIG. 11A), one more step is performed for the area centering on the location where the name data on the above map overlaps. A detailed map is drawn on the VRAM (S340), and the process returns to S320. On the other hand, if it is determined that the name data do not overlap on the VRAM (S320: none), an image of a rectangular area including the name data on which the overlap is eliminated is cut out from the image drawn on the VRAM. Display on the display device 10a and the rear seat display device 10b. In this case, only the image of the cut rectangular area may be displayed on the display device 10a and the rear seat display device 10b, or the map displayed on the display device 10a and the rear seat display device 10b in the previous 110. Simultaneously with a part of the data (for example, an area centered on the current position of the vehicle), an image of the cut rectangular area may be displayed (see FIG. 12B).

Then, this subroutine ends.
[Effect of the first embodiment]
(1) As described above, according to the navigation device 100 of the first embodiment, the control device 8 determines the situation of the vehicle on which the navigation device 100 is mounted by executing the map display process described above. Select a display priority table suitable for the situation of the selected vehicle, and prioritize the name data with higher priority of that type according to the priority of each name data type specified in the selected display priority table Are displayed on the display device 10a and the rear seat display device 10b. Thereby, when displaying map data, name data useful for a user can be displayed easily.

  (2) Moreover, according to the navigation apparatus 100 of 1st embodiment, when the name data which exist on a map overlap, the overlap is performed by performing the overlap avoidance process which is a subroutine of the above-mentioned map display process. Is solved. For example, if name data with low priority is hidden, name data with low priority is moved, and name data with the same priority overlap each other, the map where the overlap occurs For example, a partial enlarged view is generated for the part. This makes it easy to confirm name data useful for the user.

  (3) Moreover, according to the navigation apparatus 100 of 1st embodiment, when changing to the display priority table corresponding to the signal which instruct | indicates the change of a display priority table in S130 of map display processing, Select the one with the higher value of the coefficient assigned to the display priority table. This makes it possible to select a display priority table that suits the user's preference, and therefore, it is possible to easily confirm name data useful for the user.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, It is possible to implement in the following various aspects.

  (1) In the above embodiment, when name data with the same priority overlap, the overlap is eliminated by generating a partial enlarged view for the portion of the map where the overlap occurs, but this is not limitative. Instead, the overlap may be eliminated by executing the overlap avoiding process (3) described later to display the plurality of overlapping name data in order.

[Description of Overlap Avoidance Processing (3)]
Next, the overlap avoidance process (3) executed by the control device 8 of the navigation device 100 will be described with reference to the flowchart of FIG.

  This overlap avoidance process (3) is a subroutine for the map display process described above, and is executed by the control device 8 instead of the overlap avoidance process (2) when the process proceeds to S170 during the map display process. Process.

  First, name data whose type priority is “1” in the display priority table is drawn on the VRAM (S410), and it is determined whether or not the name data overlap on the VRAM (S420). If it is determined that the name data overlap each other on the VRAM (S420: present), the overlapping name data is set to be displayed alternately (S440, see FIG. 11B), and the process returns to S420. On the other hand, if it is determined that the name data do not overlap on the VRAM (S420: none), the name data whose type priority is “1” in the display priority table is displayed on the display device 10a and the rear seat. Display on the display device 10b (S430).

Then, this subroutine ends.
In this way, a plurality of overlapping name data as described above can be displayed so as not to overlap, so that it is easy to confirm name data useful for the user.

  (2) In the above embodiment, when name data with the same priority overlap, the overlap is eliminated by generating a partial enlarged view for the portion of the map where the overlap occurs, but this is not limitative. Instead, as illustrated in FIG. 12 (a), a point and name data are associated with each other by using an instruction line on a map and a figure indicating related information, and the overlap is eliminated by moving the name data. It may be.

  (3) Moreover, you may make it hide name data whose priority is lower than a predetermined order | rank. For example, name data with a priority of 8th or higher is displayed on a map, and name data with a priority of 9th or lower is not displayed. In this way, it is possible to prevent the display of name data that is not useful to the user, and thus it is possible to easily check the name data that is useful to the user. In addition, the processing load on the control device 8 can be reduced, and the processing time of the control device 8 can be shortened. Therefore, the time for the user to wait until the display is completed is shortened, and the convenience for the user is improved. Can do.

  (4) In the above embodiment, when the display priority table is changed to the display priority table corresponding to the signal for instructing the change of the display priority table in S130 of the map display process, the coefficient added to each display priority table However, when there are a plurality of selection candidates, a new display priority table may be generated by combining these display priority tables. Specifically, as illustrated in FIG. 10, a score value is set for each type of name data in each display priority table, and the display priority table for seniors illustrated in FIG. When the guidance priority table illustrated in FIG. 10B is combined, an average value of score values of the same type is calculated (see FIG. 10C). Note that the threshold value B for switching between display and non-display is set to an average value of both. In this way, it is possible to newly generate a display priority table that suits the user's preference, and therefore it is possible to easily confirm name data useful for the user.

1 is a schematic configuration diagram of a navigation device 100. FIG. (A) is explanatory drawing (1) which shows the example of a display by the display apparatus 10a and the display apparatus 10b for rear seats, (b) is explanatory drawing (2) which shows the example of a display by the display apparatus 10a and the display apparatus 10b for rear seats. ). It is a flowchart which shows the map display process which the control apparatus 8 of the navigation apparatus 100 performs. (A) is explanatory drawing which shows the display priority table at the time of non-guidance, (b) is a display example of the map created according to the display priority table at the time of non-guidance. (A) is explanatory drawing which shows the display priority table at the time of guidance, (b) is a display example of the map produced according to the display priority table at the time of guidance. It is a flowchart which shows the overlap avoidance process (1) which the control apparatus 8 of the navigation apparatus 100 performs. (A) is explanatory drawing (1) explaining an overlap avoidance process, (b) is explanatory drawing (2) explaining an overlap avoidance process. It is a flowchart which shows the overlap avoidance process (2) which the control apparatus 8 of the navigation apparatus 100 performs. It is a flowchart which shows the overlap avoidance process (3) which the control apparatus 8 of the navigation apparatus 100 performs. (A) is explanatory drawing which shows the display priority table for seniors, (b) is explanatory drawing which shows the display priority table (2) at the time of guidance, (c) is two display priority tables. It is explanatory drawing which shows the display priority table newly synthesize | combined and produced | generated. (A) is explanatory drawing (3) explaining an overlap avoidance process, (b) is explanatory drawing (4) explaining an overlap avoidance process. (A) is explanatory drawing (5) explaining an overlap avoidance process, (b) is explanatory drawing (6) explaining an overlap avoidance process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Position detector, 2 ... Gyroscope, 3 ... Geomagnetic sensor, 4 ... Vehicle speed sensor, 5 ... GPS receiver, 6 ... Map data input device, 7 ... External storage medium, 8 ... Control apparatus, 8a ... Current position detection Means, 8b ... Map data storage means, 8c ... Mark point data storage means, 8d ... Guide data storage means, 8e ... Data processing means, 9 ... Speaker, 10a ... Display device, 10b ... Back seat display device, 11 ... Operation Switch group, 12 ... remote control sensor, 13 ... remote control

Claims (1)

Map information acquisition means capable of acquiring map information including name information;
Display means capable of displaying a part of the map information acquired by the map information acquisition means;
Display control means for displaying a part of the map information acquired by the map information acquisition means on the display means;
When the display means displays a part of the map information, when a plurality of name information overlaps, a priority table in which the name information to be preferentially displayed is ranked according to a specific rule for each type is stored. A priority table storage means;
Vehicle status determination means for determining the status of the vehicle on which the map display device is mounted;
Selection means for selecting a priority table suitable for the vehicle situation determined by the vehicle situation determination means from a priority table stored in the priority table storage means;
The priority table stored by the priority table storage means includes a priority table suitable for guidance and a priority table suitable for non-guidance,
The vehicle situation determination means determines whether the vehicle is in guidance or not as part of the vehicle situation;
The selection means is attached to the priority table when selecting the priority table suitable for the vehicle situation determined by the vehicle situation determination means from the priority table stored in the priority table storage means. When a priority table with a higher coefficient value is selected and there are a plurality of priority tables selected at this time, a new priority table is generated by combining the plurality of priority tables, and used.
In accordance with the priority for each type of name information set in the priority table selected by the selection unit, the display control unit hides the name information whose priority is lower than a predetermined rank, By displaying the name information whose priority of the type is a predetermined order or more, the name information having a high priority of the type is displayed preferentially ,
further,
When the display means displays a part of the map information, the display means comprises a judging means for judging whether or not a plurality of name information overlap each other,
When the display means displays a part of the map information and the determination means determines that a plurality of name information overlaps, the display control means determines the priority table selected by the selection means. In accordance with the priority of each name information type, the name information whose priority is lower than the other is hidden among a plurality of overlapping name information, and the priority of that type among a plurality of overlapping name information A map display device characterized by eliminating overlapping of a plurality of name information by displaying name information higher than the other at that position .