WO2020209017A1 - Display method, display device, display system, and computer program - Google Patents

Abstract

This display method is a method for displaying, on a display device, a travel route on a road, and includes: a specification step in which a road element of a prescribed type is specified among a plurality of road elements making up the travel route; and a display step in which a plurality of planar figures that are arranged so as to encompass all or a portion of the travel route are displayed on the display device, and in addition thereto, a linear figure that follows along the road element of the prescribed type is displayed on the display device.

Description

Display methods, display devices, display systems, and computer programs

The present disclosure relates to display methods, display devices, display systems, and computer programs.
This application claims priority based on Japanese Application No. 2019-076453 filed on April 12, 2019, and incorporates all the contents described in the Japanese application.

Conventionally, the range that a moving body such as an electric vehicle can reach is displayed in an area (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2015-212706

The display method according to one embodiment is a method of displaying a travel route on a road on a display device, and includes a specific step for specifying a predetermined type of road element among a plurality of road elements constituting the travel route, and the above-mentioned. A display step of displaying a plurality of surface figures arranged so as to include a part or all of the traveling route on the display device and displaying a line figure along the road element of the predetermined type on the display device. including.

The display device according to another embodiment is a display device that displays a travel route on a road on a display unit, and displays a plurality of surface figures arranged so as to include a part or all of the travel route. A processing unit is provided which performs a process of displaying a line graphic along a predetermined type of road element among a plurality of road elements constituting the traveling route on the display unit.

The display system according to another embodiment is a display system that displays a travel route on a road, and is information that calculates the travel route based on road data including information indicating a plurality of road elements constituting the travel route. The display device includes a processing device and a display device having a display unit for displaying the travel route, and the display device displays a plurality of surface figures arranged so as to include a part or all of the travel route. In addition to displaying the line graphic along the road element of a predetermined type among the plurality of road elements, the display unit is displayed.

A computer program according to another embodiment is a computer program for causing a computer to execute a process of displaying a travel route on a road on a display device, and arranges the computer so as to include a part or all of the travel route. A computer for displaying a plurality of surface figures on the display device and displaying a line graphic along a predetermined type of road element among the plurality of road elements constituting the travel route on the display device. It is a program.

FIG. 1 is a block diagram showing an example of the configuration of the navigation device according to the first embodiment. FIG. 2 is a diagram showing an example of a screen displaying a cruising route using a line figure. FIG. 3 is a diagram illustrating a plurality of surface figures for showing a cruising route. FIG. 4 is a diagram showing an example of a screen displaying a cruising route using a plurality of surface figures. FIG. 5 is a diagram for explaining a line figure displayed in combination with a plurality of surface figures. FIG. 6 is a diagram showing an example of a display screen in which a plurality of surface figures and a line figure are combined. FIG. 7 is an enlarged view of a part of FIG. FIG. 8 is an enlarged view of a part different from FIG. 7 in FIG. FIG. 9A is an enlarged view of a part of FIG. 6, and shows a part of a link whose type is a bridge. FIG. 9B shows a case where the link is represented by a surface figure. FIG. 10 is a diagram for explaining a route when traveling back and forth between the current point and the intermediate point to be visited. FIG. 11 is a diagram showing an example of a line figure showing an expressway included in one surface figure. FIG. 12 is a flowchart showing an example of display processing. FIG. 13 is a flowchart showing an example of the process of calculating the cruising capacity. FIG. 14 is a block diagram showing a display system according to another embodiment. FIG. 15 is a block diagram showing a display system according to still another embodiment.

[Issues to be solved by this disclosure]
The moving body travels along a road or the like. Therefore, the traveling path of the moving body is linear. When the reachable range of a moving object is indicated by an area, the number of positions on the traveling route that need to be specified in order to display the traveling route is reduced by expressing the information originally represented by a linear shape by the region. It is possible to suppress the amount of processing data to be processed for display.
As a result, the processing load required for display can be reduced, and high-speed display becomes possible.

However, there are problems such as the necessary information being lost by representing the traveling route represented by a linear line in the area, and the display as if the moving object can travel in a place where the moving object cannot originally travel. It may be misleading.

This disclosure has been made in view of such circumstances, and a technique capable of displaying in detail a part of a traveling route that needs to be displayed while reducing the amount of processed data for display. The purpose is to provide.

[Effect of the present disclosure]
According to the present disclosure, it is possible to display in detail the portion of the traveling route that needs to be displayed while reducing the amount of processing data for display.

[Explanation of Embodiments of the present disclosure]
First, the contents of the embodiments will be listed and described.
(1) The display method according to the embodiment is a method of displaying a travel route on a road on a display device, and is a specific step of specifying a predetermined type of road element among a plurality of road elements constituting the travel route. A display that displays a plurality of surface figures arranged so as to include a part or all of the traveling route on the display device, and displays a line figure along the road element of the predetermined type on the display device. Including steps.

According to the above configuration, since the traveling route is displayed by a plurality of surface figures, the traveling route can be displayed by specifying the position for displaying the plurality of surface figures. Therefore, the number of positions that need to be specified for display should be reduced as compared with the case where a large number of positions on the traveling route are specified and the traveling route is displayed in a linear figure based on the large number of positions. It is possible to reduce the amount of processed data to be processed for display.
On the other hand, the road elements of a predetermined type among the plurality of road elements constituting the traveling route can be displayed in detail by displaying them as line figures.
As a result, among the traveling routes, the amount of processing data for display is reduced by displaying the road elements of the type that need not be displayed in a plane figure, and the road elements of the type that need to be displayed are displayed. , Can be displayed in detail.
As described above, according to the present disclosure, it is possible to display in detail the portion of the traveling route that needs to be displayed while reducing the amount of processed data for display.

(2) In the above display method,
The road data including information indicating the plurality of road elements, an acquisition step of acquiring map data corresponding to the road data, and a calculation step of calculating the traveling route based on the road data are further included. In the specific step, the road element of the predetermined type is specified based on the road data, and in the display step, the plurality of surface figures and the line figure are converted into a map image generated based on the map data. It may be superimposed and displayed.
In this case, the traveling route calculated by the calculation step can be displayed on the map image by a plurality of surface figures and line figures.

(3) Further, in the above display method, in the calculation step, the cruising route when the vehicle on the road travels from the reference point to the cruising point may be calculated as the traveling route.
In this case, the cruising route of the vehicle can be displayed by a plurality of surface figures and line figures.

(4) Further, in the display method, in the display step, along the direction along the traveling route according to the remaining capacity of the cruising distance of the vehicle at the elapsed point from the reference point to the cruising possible point. The plurality of surface figures and the line figure may be displayed so as to have different display modes.
In this case, the surplus power of the cruising range of the vehicle at the elapsed point can be displayed along the traveling route by a plurality of surface figures and line figures.

(5) In the display method, the calculation step obtains the remaining force for each of the plurality of road elements, and the display step is within the area of each of the plurality of surface figures in terms of the display mode of the plurality of surface figures. Each of the plurality of road elements included in the above is displayed based on the representative value obtained from the remaining capacity, and the display mode of the line figure is displayed based on the remaining capacity of each of the predetermined types of road elements. May be good.
In this case, detailed information on the remaining capacity that cannot be represented by a plurality of surface figures can be displayed by the line figure.

(6) In the above display method, the predetermined type is preferably a type indicating a road element having no intersecting roads within a predetermined distance.
Vehicles traveling on road elements that do not have crossroads for a certain distance cannot be refueled or recharged during that time. Therefore, when a road element having no crossing road reaches a cruising point in the middle of traveling, the road element can be displayed so as not to be included in the cruising route.

(7) The display device according to another embodiment is a display device that displays a travel route on a road on a display unit, and displays a plurality of surface figures arranged so as to include a part or all of the travel route. The display unit includes a processing unit that displays on the display unit and displays a line figure along a predetermined type of road element among a plurality of road elements constituting the traveling route on the display unit.

(8) It is preferable that the display device further includes a calculation unit that calculates the travel route based on road data including information indicating the plurality of road elements constituting the travel route.

(9) The display system according to another embodiment is a display system that displays a travel route on a road, and displays the travel route based on road data including information indicating a plurality of road elements constituting the travel route. An information processing device for calculating and a display device having a display unit for displaying the traveling route are provided, and the display device has a plurality of surface figures arranged so as to include a part or all of the traveling route. In addition to displaying on the display unit, a line diagram along a predetermined type of road element among the plurality of road elements is displayed on the display unit.

(10) The computer program according to another embodiment is a computer program for causing a computer to execute a process of displaying a travel route on a road on a display device, and includes a part or all of the travel route on the computer. A step of displaying a plurality of surface figures arranged in such a manner on the display device and displaying a line figure along a predetermined type of road element among the plurality of road elements constituting the traveling route on the display device. It is a computer program to be executed.

[Details of Embodiment]
Hereinafter, preferred embodiments will be described with reference to the drawings.
In addition, at least a part of the embodiments described below may be arbitrarily combined.
[About the overall configuration of the navigation device according to the first embodiment]
FIG. 1 is a block diagram showing an example of the configuration of the navigation device according to the first embodiment. The navigation device 1 is mounted on a vehicle and has a navigation function of guiding an appropriate route to a destination while detecting the position of the vehicle on the road.

The navigation device 1 as a display device includes a processing device 2, a display unit 4, an input unit 6, a CAN communication unit 8, and a position information acquisition unit 10.
The processing device 2 is configured by a computer or the like and has a function of performing various processing and calculations.
The display unit 4 is composed of a liquid crystal display or the like. The display unit 4 displays a map image for navigation, other images, characters, and the like.
The input unit 6 is composed of a touch panel combined with the display unit 4, other switches, and the like.
The CAN communication unit 8 is connected to various control units of the vehicle and has a function of performing CAN communication with various control units.
The position information acquisition unit 10 has a function of acquiring position information necessary for estimating the position of the vehicle, such as a GPS signal, acceleration, azimuth, and vehicle speed of the vehicle.

The processing device 2 includes a calculation unit 12 including a processor and the like, and a storage unit 14 including a memory and a hard disk.
The storage unit 14 stores the map database 14a and the road database 14b.
The map database 14a includes information on water systems such as rivers and coastlines, altitudes, administrative boundaries such as prefectural boundaries, railways, various facilities, and place names.
The road database 14b also includes information about road elements such as links and nodes used in combination with the map database 14a. The information about the link and the node includes node data including information for identifying the node and information indicating the type of the node, information for specifying the link, and a link indicating the type, attribute, content, etc. of the link. Includes information such as data.
The node indicates, for example, a characteristic point on the road such as an intersection, a branch point, a confluence point, and a bend point. Further, the link indicates a node and a road connecting the nodes.

Further, the storage unit 14 stores various computer programs for realizing various functions of the calculation unit 12. The storage unit 14 is a non-transient recording medium that can be read by a computer. The calculation unit 12 realizes a function of executing a process described later by executing a computer program stored (recorded) in the storage unit 14.

The calculation unit 12 functionally has a calculation unit 12a and a display processing unit 12b in addition to the function of realizing navigation.
The calculation unit 12a has a function of calculating a cruising route when the vehicle travels from a predetermined reference point to a cruising possible point where the vehicle can travel.
In addition, the display processing unit 12b has a function of displaying the cruising route, which is the travel route of the vehicle on the road, on the display unit 4.

[Display of cruising route]
The display processing unit 12b superimposes the cruising route from the current position (reference point) of the vehicle on the map and displays it on the display unit 4.
The display processing unit 12b displays the cruising route based on the detail level (for example, scale) of the map displayed on the display unit 4, the map data, and the road data.
The degree of detail (for example, scale) of the map is specified by the user from the input unit 6.
The map data used for displaying the map and the road data required for calculating the cruising route are stored in the storage unit 14 according to the vehicle position information acquired by the position information acquisition unit 10 and the degree of detail specified by the user. Obtained from the map database 14a and the road database 14b.

The cruising point, which is the end of the cruising route, is determined by the cruising range of the vehicle.
The cruising distance is the distance that a vehicle can travel on a road included in a travel route centered on a reference point by one refueling and one battery charge. For example, the remaining amount of fuel and battery remains. When expressed in terms of energy, it is the sum of the mileage per unit consumption of residual energy that changes from moment to moment.

The remaining capacity of the cruising distance at the elapsed point from the reference point to the cruising point is expressed as the ratio (% value) of the residual energy at the elapsed point to the residual energy at the reference point, and is the absolute value of the remaining fuel amount. In the case of an electric vehicle, it may be represented by SOC (State Of Charge) of the battery. It may also be expressed as the ratio of the distance from the reference point to the elapsed point to the cruising distance.

The cruising range surplus capacity at the elapsed point (hereinafter, also referred to as cruising surplus capacity) includes information on residual energy acquired from various control units of the vehicle by the CAN communication unit 8, power consumption of auxiliary equipment (not shown), number of passengers, and the like. It is calculated by the calculation unit 12a based on the vehicle information.
In the present embodiment, the cruising capacity for each node is calculated based on the links and nodes extracted from the acquired road data.
The link indicating the element of each road is associated with the remaining capacity information indicating the calculated cruising capacity. Each link is associated with the cruising capacity of the node at the link end located on the side farther from the current position of the vehicle as the residual capacity information.
The set of roads for which the cruising capacity is calculated in this way becomes the cruising route.
The cruising point, which is the end of the cruising route, indicates the position immediately before the cruising capacity is substantially exhausted.

The cruising route is displayed by using a linear figure (line figure) or a planar figure (plane figure) in a display mode according to the cruising capacity (for example, with different colors or shades in the length direction). It is displayed on the display unit 4 by the processing unit 12b.
The line figure means a line figure along the road on the map. The surface figure means a circular or polygonal figure. A plurality of surface figures are arranged so as to include a part or all of the cruising route, and are used for displaying the cruising route.

FIG. 2 is a diagram showing an example of a screen displaying a cruising route using a line figure.
In FIG. 2, the line figure 19 is displayed along the road R on the map. Note that the line figure 19 is a hatched portion and a filled linear portion on the road R on the map in FIG.

In FIG. 2, a line graphic 19 indicating a cruising route is superimposed and displayed on a map image at a scale such that the distance corresponding to the vertical width or the horizontal width of the screen is a distance of about several km.
Further, the reference point P is located at the center of the display screen.
The line figure 19 is displayed in a display mode corresponding to the remaining capacity information associated with the link indicating each road R. More specifically, the line figure 19 is represented so that the shade (hatching density in FIG. 2) differs for each link in the length direction according to the cruising reserve capacity indicated by the reserve capacity information.

Here, when the vertical and horizontal distances of the range displayed on one screen exceed approximately 50 km, if the cruising route is to be displayed by the line figure 19, the amount of data to be displayed increases and the display speed is extremely reduced. I have something to do.
When displaying the cruising route with the line figure 19, the display processing unit 12b identifies a large number of positions on the cruising route, and displays the line graphic 19 indicating the cruising route based on the many positions on the cruising route. It is displayed on the display unit 4.

In order to display the shape of the route (road) with the line figure 19, the display processing unit 12b needs to specify the position on the route with a relatively short pitch, and when the range displayed on one screen is expanded. The number of positions on the route to be specified for displaying the line figure 19 is further increased, the amount of processed data to be processed for display is also increased, and the display speed is extremely reduced.
Further, in such a case, since the road is displayed thinly, it becomes difficult to distinguish the color or the shade, and the visibility is lowered.

Therefore, in the present embodiment, when the detail level specified by the user is lower than the predetermined detail level (specifically, for example, when the vertical and horizontal display width exceeds 50 km), the display processing unit 12b determines the cruising route. It is displayed by arranging a plurality of rectangular surface figures instead of the line figure 19.

FIG. 3 is a diagram illustrating a plurality of surface figures for showing a cruising route.
As shown in FIG. 3, the plurality of rectangular surface figures 20 are a part of the cruising route 21 when the area occupied by the plurality of surface figures 20 displays the cruising route 21 on the display unit 4. Or they are arranged so as to include all.
The plurality of surface figures 20 may include surface figures 20 that do not overlap the cruising route 21.

Each surface figure 20 has the same size, and the size is preset according to the degree of detail. The size of the surface figure 20 is set to a value larger than the pitch of the position on the cruising route 21 specified at the time of displaying the line figure 19.
The surface figure 20 is not limited to a rectangular shape, and may be a figure having another shape such as another polygon such as a hexagon or a circle.

Further, the surface figures 20 are regularly arranged and arranged according to a grid set in the vertical and horizontal directions of the screen. The surface figures 20 are arranged so as not to overlap each other.
The display processing unit 12b specifies a position where the plurality of surface figures 20 should be arranged when a plurality of surface figures 20 are arranged so as to include a part or all of the cruising route 21, and at the specified position. Based on this, a plurality of surface figures 20 indicating a cruising route are displayed on the display unit 4.

As described above, the size of the surface figure 20 is set to a value larger than the pitch of the position on the cruising route 21 specified at the time of displaying the line image. Therefore, the pitch of the surface figures 20 adjacent to each other becomes larger than the pitch of the position specified when displaying the line image. Therefore, the number of positions to be specified for the display processing unit 12b to display the surface figure 20 is smaller than the number of positions to be specified when displaying the line image, and the display load is reduced.
The larger the size of the surface figure 20, the larger the pitch between the surface figures 20 adjacent to each other, and the load on the display is further reduced.

FIG. 4 is a diagram showing an example of a screen displaying a cruising route using a plurality of surface figures 20. In FIG. 4, the same map as the map shown in FIG. 2 is used.
As shown in FIG. 4, the plurality of surface figures 20 are displayed side by side along the portion of the road R included in the cruising route on the map image.
Similar to the line figure 19 in FIG. 2, the plurality of surface figures 20 are also displayed in a display mode corresponding to the remaining capacity information associated with the link indicating each road R.

Each surface figure 20 is displayed on the display unit 4 in a display mode according to the remaining capacity information associated with the link included in the area occupied by each surface figure 20. The surface figure 20 is represented so as to have different shades (hatching density in FIG. 4) according to the cruising reserve capacity indicated by the reserve capacity information.
When a plurality of links are included in the area occupied by one surface figure 20 and the remaining capacity information associated with the plurality of links is different from each other, the cruising capacity of any of the remaining capacity information from the plurality of remaining capacity information is selected. As a representative value, it is reflected in the display mode of one surface figure 20.
The selection criteria for selecting the reserve capacity information to be reflected in one surface figure 20 from the plurality of reserve capacity information is set in advance.

For example, when the remaining capacity information of each of the plurality of links included in the area occupied by the one surface figure 20 is different from each other, the remaining capacity information having the smallest cruising remaining capacity is selected as the remaining capacity information to be reflected in the display mode of the one surface figure 20. Can be set as.
As a result, the one surface figure 20 is displayed in a safer side display mode (color or shade indicating that the cruising capacity is small) with respect to the cruising capacity.

Further, when the display processing unit 12b of the present embodiment displays the cruising route 21 by a plurality of surface figures 20, among the links constituting the cruising route 21, the link of a predetermined type is along the link. The line figure 19 is displayed. That is, the display processing unit 12b combines the plurality of surface figures 20 and the line figure 19 and displays them at the same time (same period).

The display processing unit 12b displays, among the links constituting the cruising route 21, a link having no crossing road within a predetermined distance as a line figure 19.
A link that does not have a crossing road within a predetermined distance is a link whose link length is longer than the predetermined distance, or a relatively long distance from a general road such as an elevated road, a bridge, a tunnel, or an expressway. Points to a link that is.
Therefore, among the links included in the cruising route 21, the display processing unit 12b displays the links whose types are elevated, bridges, tunnels, cave gates, and expressways as line figures 19.

FIG. 5 is a diagram for explaining a line figure 19 displayed in combination with a plurality of surface figures 20.
The plurality of surface figures 20 in FIG. 5 are arranged side by side so as to include the cruising route 21.
It is assumed that the cruising route 21 in FIG. 5 includes a link 21a of the elevated type.
In this case, since the type of the link 21a is elevated, the display processing unit 12b displays the link 21a as a line figure 19. The display processing unit 12b identifies the position of the link 21a and displays the line figure 19 along the link 21a.
The surface figure 20 in the section of the link 21a may or may not be displayed.

FIG. 6 is a diagram showing an example of a display screen in which a plurality of surface figures 20 and a line figure 19 are combined.
In FIG. 6, one side of the surface figure 20 is set to about 2 km. Each surface figure 20 is arranged based on the method shown in FIGS. 3 and 5.
The plurality of surface figures 20 and line figures 19 are superimposed and displayed on the map image according to the degree of detail.

The reference point in FIG. 6 is located substantially in the center of the display screen.
The plurality of surface figures 20 shown in FIG. 6 are displayed in four stages of display modes according to the remaining capacity information. In FIG. 6, the surface figure 20a in the first stage, which has the darkest hatching, has the largest cruising capacity, and the surface figures 20b, 20c, 20d, and the order in which the hatching becomes thinner in stages (second stage, third stage, And the 4th stage), it shows that the cruising capacity is small.

As described above, the surface figure 20 has a rectangular shape with a side of about 2 km, and the surface figure 20 includes a large number of links. Therefore, the display mode of each surface figure 20 is set based on the representative value of the cruising reserve capacity obtained from the reserve capacity information corresponding to the link included in each surface figure 20.

The range of cruising capacity is divided into four numerical ranges corresponding to the above-mentioned four stages related to the display mode. The display processing unit 12b specifies which of the four numerical ranges the representative value of each surface figure 20 belongs to, and determines the display mode of each surface figure 20 based on the specified numerical range.

As described above, the line figure 19 in FIG. 6 is displayed linearly along a link indicating an overpass, a bridge, a tunnel, a cave, and a highway.
Like the surface figure 20, the line figure 19 in FIG. 6 is also displayed in a four-stage display mode according to the remaining capacity information. In FIG. 6, for ease of understanding, the line figure 19 is shown in a linear shape regardless of the stage of the display mode.

FIG. 7 is an enlarged view of a part of FIG.
In FIG. 7, a portion including the second-stage surface figure 20b, the third-stage surface figure 20c, and the fourth-stage surface figure 20d is shown.

As described above, the display mode of the line figure 19 is set according to the cruising power of the remaining power information associated with the link displayed by the line figure 19.
Like the surface figure 20, the line figure 19 shown in FIG. 7 is displayed in a four-stage display mode according to the remaining capacity information. In FIG. 7, the line figure 19a in the first stage with the darkest hatching has the largest cruising capacity, and the line figures 19b, 19c, 19d are shown below in the order in which the hatching becomes thinner in stages (second stage, third stage, And 4th stage), it shows that the cruising capacity is small.

In the display processing unit 12b, the surplus capacity information (cruising surplus capacity) associated with the link displayed by each line figure 19 belongs to any of the above-mentioned four numerical ranges obtained by dividing the range of the cruising surplus capacity. Is specified, and the display mode of each line figure 19 is determined based on the specified numerical range.
Therefore, the display mode of the line figure 19a in the first stage shows the same cruising capacity as the surface figure 20a in the first stage, and the display mode of the line figure 19b in the second stage is the same as the surface figure 20b in the second stage. The display mode of the line figure 19c of the third stage shows the same cruising power as the surface figure 20c of the third stage, and the display mode of the line figure 19d of the fourth stage is the surface of the fourth stage. It shows the same cruising capacity as the figure 20d.

As shown in FIG. 7, the plurality of surface figures 20 and the line figure 19 are displayed in a display mode corresponding to the remaining capacity information associated with each link, and have a cruising capacity from the reference point to the cruising possible point. Correspondingly, a plurality of surface figures 20 and line figures 19 are displayed so as to have different display modes along the cruising route 21.
As a result, the cruising reserve capacity from the reference point to the cruising point can be displayed along the cruising route 21 by the plurality of surface figures 20 and the line figure 19.

Here, in FIG. 7, the boundary portion 30a between the line figure 19b of the second stage and the line figure 19c of the third stage is located within the surface figure 20c of the third stage. Therefore, the boundary portion 30a is deviated from the boundary between the surface figure 20b of the second stage and the surface figure 20c of the third stage.
Further, the boundary portion 30b between the line figure 19c of the third stage and the line figure 19d of the fourth stage is also located in the surface figure 20c of the third stage. Therefore, the boundary portion 30b is deviated from the boundary between the surface figure 20c of the third stage and the surface figure 20d of the fourth stage.
Further, the end 30c of the line figure 19d of the fourth stage is located within the region of the surface figure 20d of the fourth stage. The end 30c is the end of the link including the cruising point which is the end of the cruising route.
Further, FIG. 8 is an enlarged view of a part different from FIG. 7 in FIG. In FIG. 8, the end 30c of the line figure 19d of the fourth stage is located outside the area of the surface figure 20.

That is, there is a gap between the cruising capacity shown by the surface figure 20 and the cruising capacity shown by the line figure 19.
In this case, the cruising margin shown by the line figure 19 is more accurate and accurate than the cruising margin shown by the surface figure 20. This is because the line figure 19 is displayed in a display mode based on the cruising capacity associated with the link.

In the present embodiment, the cruising reserve capacity is obtained for each link, and the display mode of the surface figure 20 is displayed based on the representative value obtained from the residual capacity associated with the link included in each area of the surface figure 20. The display mode of the line figure 19 is displayed based on the cruising capacity associated with the link displayed by the line figure 19.
As a result, detailed information on the cruising capacity that cannot be represented by the surface figure 20 can be displayed by the line figure 19.

Further, in the present embodiment, a line figure 19 is configured to display a type of link having no crossing road within a predetermined distance.
Vehicles traveling on links that do not have crossing roads for a certain distance, such as highways, cannot be refueled or charged during that time. Therefore, when the cruising point is reached during the traveling of such a link, the link can be displayed so as not to be included in the cruising route.

In FIG. 7, the link shown by the line figure 19d in the fourth stage is an expressway. The expressway extends further ahead of the end 30c of the line figure 19d of the fourth stage, but since there is a cruising point somewhere in the link including the end 30c, the link connected to the end 30c continues. It is displayed not to be included in the possible routes. Therefore, in FIG. 7, the end 30c of the line figure 19d of the fourth stage is located within the region of the surface figure 20d of the fourth stage.

FIG. 9A is an enlarged view of a part of FIG. 6, and shows a part of a link whose type is a bridge.
In FIG. 9A, the link 21b whose type is a bridge is represented by the line figure 19b of the second stage. Both ends of the link 21b are represented by a first-stage surface figure 20a and a third-stage surface figure 20c.
In FIG. 9A, since the link 21b is represented by the line figure 19b, it is clearly displayed that the link 21b is a bridge.

FIG. 9B shows a case where the link 21b is represented by the surface figure 20.
In FIG. 9B, the link 21b whose type is a bridge is represented by the surface figure 20b of the second stage.
In the case of FIG. 9B, since the link 21b is represented by the surface figure 20b, the link 21b, which is a bridge, is displayed unnaturally and widely.

As described above, in the present embodiment, when the type of the link is a bridge, it is displayed by the line figure 19, so that it is possible to clearly display that the link is a bridge.

FIG. 10 is a diagram for explaining a route when traveling back and forth between the current point and the intermediate point to be visited.
When the planned travel route 35 of the vehicle is given by the user, the calculation unit 12a of the present embodiment calculates the cruising capacity according to the planned travel route 35 and obtains the cruising possible route 21 along the planned travel route 35.

For example, in FIG. 10, a planned travel route 35 is set with the same road as an outward route and a return route so as to travel from the current position to the intermediate point to be visited, travel the same route from the intermediate point, and return to the current location again. Being done.
Further, it is assumed that a link 21c whose type is an expressway is included between the current point and the intermediate point.

The planned travel route 35 in FIG. 10 includes an outward route from the current point to the intermediate point and a return route from the intermediate point to the current point. The outbound and inbound routes pass through the same road, but are different routes.
When the planned travel route 35 shown in FIG. 10 is given, the calculation unit 12a calculates the remaining capacity along the planned travel route 35.

Here, the display processing unit 12b sets the display mode of the surface figure 20 based on the cruising reserve calculated along the outward route. Taking into account the cruising capacity calculated along the return route, the cruising capacity of the return route is smaller than the cruising capacity of the outward route. This is because it becomes impossible to display.

Further, the display processing unit 12b displays the link 21c as a line figure 19. Here, the display processing unit 12b displays the outbound route and the inbound route separately for the line figure 19. The display processing unit 12b sets the display mode for each of the outbound line graphic 19 and the inbound line graphic 19 according to the cruising capacity along the planned traveling route 35 (cruising route 21). Therefore, the display mode of the outward line figure 19 and the return line figure 19 may be different.

FIG. 11 is a diagram showing an example of a line figure 19 showing an expressway included in one surface figure 20.
In FIG. 11, the area of the surface figure 20b of the second stage includes the line figure 19b of the second stage and the line figure 19d of the fourth stage.
The line figure 19b of the second stage is the line figure 19 of the outward route. Further, the line figure 19d of the fourth stage is the line figure 19 of the return route. In addition, the surface figure 20b of the second stage also includes the end 30c of the line figure 19d of the fourth stage, which is the end of the cruising route.

As described above, in the present embodiment, since the outbound route and the inbound route are displayed separately for the line figure 19, more detailed information regarding the cruising capacity of the cruising range can be displayed.

[About display processing]
Next, the procedure of the display processing performed by the navigation device 1 of the present embodiment will be described.
FIG. 12 is a flowchart showing an example of display processing.
FIG. 12 shows, for example, a case in which the operation for specifying the degree of detail (scale) related to the display of the cruising route is configured to be executed when the input unit 6 receives the operation.

First, the calculation unit 12 of the navigation device 1 has a predetermined type of link (a predetermined distance) such as an elevated road, a bridge, a tunnel, a cave, or an expressway among the links (plurality of road elements) included in the road database 14b. (Links without crossing roads) are specified (step S1: specific step), and the specified links are stored.
If the link S1 is executed once and the specified link is stored, the display process can be executed using the stored information. Therefore, if the display process is performed once and then the display process is executed again, step S1 may be omitted.

Next, the calculation unit 12 determines whether or not the input unit 6 has accepted the input of the degree of detail specified by the user (step S2). The calculation unit 12 repeats step S2 until the input of the degree of detail is received.

If it is determined in step S2 that the input of the degree of detail has been accepted, the calculation unit 12 acquires the position of the vehicle by the position information acquisition unit 10 (step S3), and determines the cruising distance from various control units of the vehicle through the CAN communication unit 8. Acquire the vehicle information necessary for calculating the remaining capacity (step S4).

Next, the calculation unit 12 acquires map data according to the position of the vehicle and the designated degree of detail from the map database 14a of the storage unit 14. Further, the calculation unit 12 acquires road data according to the position of the vehicle and the designated degree of detail from the road database 14b of the storage unit 14 (step S5: acquisition step).
When the map data and the road data are acquired, the calculation unit 12a of the calculation unit 12 calculates the cruising capacity (step S6: calculation step).

FIG. 13 is a flowchart showing an example of the process of calculating the cruising capacity.
The calculation unit 12a calculates the cruising reserve capacity when traveling on each link centering on the current position of the vehicle for each node.
The calculation unit 12a sequentially extracts one node from the road data (step S11), and calculates the cruising capacity of the one node (step S12).
Next, the calculation unit 12a determines whether or not the cruising capacity has been calculated for all the nodes included in the acquired road data (step S13).

If it is determined that the cruising capacity has not been calculated for all the nodes, the calculation unit 12a returns to step S11 again and repeats the processes of steps S11, S12, and S13.
When it is determined that the cruising capacity has been calculated for all the nodes, the calculation unit 12a returns to the flowchart of FIG.
As a result, the calculation unit 12a calculates the cruising capacity for all the nodes included in the road data.

Returning to FIG. 12, when the cruising reserve capacity is calculated in step S6, the display processing unit 12b of the calculation unit 12 determines whether or not the detail level specified by the user is lower than the predetermined detail level (step S7). ..
When it is determined that the specified level of detail is not lower than the predetermined level of detail, the display processing unit 12b displays the cruising route obtained from the remaining capacity of the cruising distance on the display unit 4 using only the line figure 19 (step S9). ), Finish the process.
At this time, as described above, the display mode of the display processing unit 12b is represented so that the shade is different for each link in the length direction according to the cruising capacity.

On the other hand, when it is determined that the designated detail level is lower than the predetermined detail level, the display processing unit 12b displays both the line figure 19 and the surface figure 20 on the display unit 4 for the cruising route obtained from the cruising reserve capacity. (Step S8: Display step), and the process is completed. That is, both the line figure 19 and the surface figure 20 are displayed on the same screen.
At this time, the display processing unit 12b displays the link of the predetermined type specified in step S1 with the line figure 19. Further, the cruising route is displayed by a plurality of surface figures 20.
The display mode executed by the display processing unit 12b in step S8 when the plurality of surface figures 20 and the line figure 19 are both displayed is as described above.

According to the present embodiment, the cruising route 21 which is a traveling route is displayed by a plurality of surface figures 20, so that the cruising route 21 can be displayed by specifying the position for displaying the plurality of surface figures 20. Can be done. Therefore, the number of positions that need to be specified for display is reduced as compared with the case where a large number of positions on the cruising route 21 are specified and the cruising route 21 is displayed as a line figure based on the large number of positions. It is possible to reduce the amount of processing data to be processed for display.

On the other hand, one or a plurality of predetermined types of links among the plurality of links constituting the cruising route 21 can be displayed in detail by displaying them with the line figure 19.
As a result, among the cruising routes 21, the types of links that are less necessary to be displayed are displayed with the surface figure 20 to reduce the amount of processing data for display, and the types of links that are more necessary to be displayed are displayed. Can be displayed in detail.
As a result, according to the present embodiment, it is possible to display in detail the portion of the cruising route 21 that needs to be displayed while reducing the amount of processing data for display.

[About other embodiments]
FIG. 14 is a block diagram showing a display system according to another embodiment.
In the present embodiment, the navigation device 1 is configured to acquire map data and road data from a road data server 41 and a map data server 42 connected to a network 40 such as the Internet by LAN communication, wireless communication, or the like. In that respect, it differs from the above-described embodiment.

The road data server 41 has a road database 14b. Further, the map data server 42 has a map database 14a.
When performing display processing, the navigation device 1 connects to the road data server 41 and the map data server 42 via the network 40, and acquires map data and road data.
In this case, the navigation device 1 does not need to include the map database 14a and the road database 14b, and the amount of information to be stored by the navigation device 1 can be suppressed.

FIG. 15 is a block diagram showing a display system according to still another embodiment.
The present embodiment is different from the other embodiments in that the information processing device 45 including the calculation unit 45a is connected to the network 40.

The calculation unit 45a included in the information processing device 45 has the same function as the calculation unit 12a in the above embodiment.
In the present embodiment, when the navigation device 1 receives the operation of designating the detail level, the navigation device 1 gives the position of the vehicle and the designated detail level to the information processing device 45.

The information processing device 45 given the position of the vehicle and the specified degree of detail acquires road data according to the position of the vehicle and the specified degree of detail from the road data server 41 and the map data server 42.
Next, the calculation unit 45a of the information processing device 45 calculates the remaining capacity of the cruising range, and gives the calculated result to the navigation device 1.
The display processing unit 12b of the navigation device 1 executes the display on the display unit 4 based on the given calculation result.

In this case, since the navigation device 1 does not need to have a configuration corresponding to the calculation unit, the processing load to be borne by the navigation device 1 can be distributed.

[Other]
It should be noted that the embodiments disclosed this time are examples in all respects and are not restrictive.
In each of the above embodiments, the calculation unit 12a calculates the cruising route when the vehicle on the road travels from the current point to the cruising possible point as the traveling route, and determines the cruising route as the plurality of surface figures 20 and the cruising possible route. The case where the line figure 19 is displayed is illustrated, but for example, the cruising capacity is not displayed depending on the display mode of the surface figure 20 and the line figure 19, and the traveling route from the current position to the cruising possible point is simply indicated by the plurality of surface figures 20 and the line figure 19. It may be configured to be displayed as a line figure 19.

Further, in each of the above embodiments, the case where the designation of the detail level is accepted and the detail level is lower than the predetermined detail level and the line figure 19 and the surface figure 20 are displayed in combination is illustrated. Regardless of this, the line figure 19 and the surface figure 20 may be displayed in combination.

Further, in each of the above embodiments, among the links included in the road database 14b, a predetermined type of link such as an elevated bridge, a bridge, a tunnel, a cave, or an expressway (a link having no crossing road within a predetermined distance) Although the case where the calculation unit 12 performs the specifying process is illustrated, for example, the user may specify a predetermined type of link, input it in advance to the navigation device 1, and store it.

The scope of the present disclosure is indicated by the claims and is intended to include all changes within the meaning and scope equivalent to the claims.

1 Navigation device 2 Processing device 4 Display unit 6 Input unit 8 CAN communication unit 10 Position information acquisition unit 12 Calculation unit 12a Calculation unit 12b Display processing unit 14 Storage unit 14a Map database 14b Road database 19, 19a, 19b, 19c, 19d line Figure 20, 20a, 20b, 20c, 20d Plane figure 21 Navigable route 21a, 21b, 21c Link 30a, 30b Boundary 30c Termination 35 Scheduled travel route 40 Network 41 Road data server 42 Map data server 45 Information processing device 45a Calculation unit R road

Claims (10)

1. It is a method of displaying the traveling route on the road on a display device.
   A specific step for specifying a predetermined type of road element among a plurality of road elements constituting the traveling route, and
   A display step of displaying a plurality of surface figures arranged so as to include a part or all of the traveling route on the display device and displaying a line figure along the road element of the predetermined type on the display device. Display method including ,.
2. An acquisition step of acquiring road data including information indicating the plurality of road elements and map data corresponding to the road data, and
   Further including a calculation step of calculating the traveling route based on the road data,
   In the specific step, the road element of the predetermined type is specified based on the road data.
   The display method according to claim 1, wherein in the display step, the plurality of surface figures and the line figure are superimposed and displayed on a map image generated based on the map data.
3. In the calculation step,
   The display method according to claim 2, wherein the cruising route when the vehicle on the road travels from the reference point to the cruising point is calculated as the traveling route.
4. In the display step,
   The plurality of surface figures and the line so as to have different display modes along the direction along the traveling route according to the remaining capacity of the cruising distance of the vehicle at the elapsed point from the reference point to the cruising point. The display method according to claim 3, wherein the figure is displayed.
5. In the calculation step, the remaining capacity is obtained for each of the plurality of road elements.
   The display step is
   The display mode of the plurality of surface figures is displayed based on the representative value obtained from the remaining capacity of each of the plurality of road elements included in the area of each of the plurality of surface figures.
   The display method according to claim 4, wherein the display mode of the line figure is displayed based on the remaining capacity of the road element of the predetermined type.
6. The display method according to any one of claims 1 to 5, wherein the predetermined type is a type indicating a road element having no intersecting roads within a predetermined distance.
7. It is a display device that displays the traveling route on the road on the display unit.
   A plurality of surface figures arranged so as to include a part or all of the traveling route are displayed on the display unit, and along a predetermined type of road element among the plurality of road elements constituting the traveling route. A display device including a processing unit that performs a process of displaying a line figure on the display unit.
8. The display device according to claim 7, further comprising a calculation unit that calculates the travel route based on road data including information indicating the plurality of road elements constituting the travel route.
9. A display system that displays the driving route on the road.
   An information processing device that calculates the travel route based on road data including information indicating a plurality of road elements constituting the travel route.
   A display device having a display unit for displaying the traveling route is provided.
   The display device displays a plurality of surface figures arranged so as to include a part or all of the traveling route on the display unit, and is along a predetermined type of road element among the plurality of road elements. A display system that displays line figures on the display unit.
10. It is a computer program for causing a computer to execute a process of displaying a traveling route on a road on a display device.
    A plurality of surface figures arranged so as to include a part or all of the traveling route on the computer are displayed on the display device, and a predetermined type of road element among the plurality of road elements constituting the traveling route is displayed. A computer program that executes a step of displaying a line figure along a line on the display device.

Images