JP2020144135A - Display control device, control method, program, and storage medium - Google Patents

Abstract

To provide a display control device capable of presenting guidance information about a facility to a user with appropriate timing and erasing the presented information.SOLUTION: A display control device has an acquisition unit and a display control unit. The acquisition unit acquires a current position of a moving body. The display control unit causes a display unit to display a facility guidance image, and executes first display control and second display control. In the first display control, the display control unit causes the display unit to display the guidance image of the facility adjacent to a first road when the moving body enters a prescribed range from a branch point into a first road and a second road. In the second display control, the display control unit causes the display unit to display the guidance image for prescribed time and to erase display of the guidance image after an elapse of the prescribed time, when the moving body is recognized to be moving on the second road after having passed the branch point.SELECTED DRAWING: Figure 4

Description

The present invention relates to a technique for displaying a guide image of a facility.

Conventionally, there has been known a technique for displaying information on facilities (also referred to as "expressway facilities") associated with expressways such as parking areas and service areas in navigation devices mounted on automobiles. For example, Patent Document 1 discloses a technique of displaying a predetermined number of guide boxes showing guidance information of each facility in order from a facility closest to the current position on a straight line figure simulating an expressway. Further, Patent Document 1 also describes that when displaying the guidance information of an interchange or a junction, the guidance information is displayed when approaching these points.

Japanese Unexamined Patent Publication No. 2008-267820

It is preferable that the guidance information of the expressway facility is displayed when the facility is approached to a certain extent, and then deleted at an appropriate timing. However, Patent Document 1 does not describe or suggest the timing of erasing the guidance information.

The present invention has been made to solve the above problems, and provides a display control device capable of presenting and erasing facility guidance information to a user at an appropriate timing. The main purpose.

The invention according to claim is a display control device, comprising an acquisition unit for acquiring the current position of a moving body and a display control unit for displaying a guide image of a facility on the display unit. With the first display control of displaying a guide image of a facility adjacent to the first road on the display unit when the moving body enters within a predetermined range from a branch point branching into the first road and the second road. When it is recognized that the moving body is moving on the second road after passing through the branch point, the guide image is displayed for a predetermined time, and the guide image is displayed after the predetermined time has elapsed. It is characterized in that a second display control for erasing is performed.

Further, the invention according to the claim is a control method executed by a display control device, which includes an acquisition step of acquiring the current position of a moving body and a display control step of displaying facility guidance information on a display unit. In the display control step, the display control device is a facility adjacent to the first road when the moving body enters within a predetermined range from a branch point branching into a first road and a second road. When the first display control for displaying the guide image of the above and the recognition that the moving body is moving on the second road after passing the branch point, the guide image is displayed for a predetermined time. A second display control is performed, in which the display is displayed and the display of the guide image is erased after the lapse of the predetermined time.

The invention according to claim is a program executed by a computer, in which the computer functions as an acquisition unit for acquiring the current position of a moving body and a display control unit for displaying facility guidance information on the display unit. , The display control unit displays a guide image of a facility adjacent to the first road on the display unit when the moving body enters within a predetermined range from a branch point branching into the first road and the second road. When it is recognized that the moving body is moving on the second road after passing through the branch point, the guide image is displayed for a predetermined time, and the predetermined time elapses. A second display control for later erasing the display of the guide image is performed.

The front view of the terminal device is shown. The schematic configuration of the terminal device is shown. An example of display immediately before determining that the service area "○ × SA" has been approached is shown. A display example is shown when it is determined that the service area "○ × SA" has been approached. It is a conceptual diagram which simply represented the current position of a vehicle by a link and a node. The transition of the current position when the display of the facility map image is erased is shown. It is the figure which clarified the branch angle in the example of FIG. 5 and FIG. It is a figure which clearly shows the perpendicular line passing through the present position in the example of FIG. A configuration example of the system according to the modified example is shown. The schematic configuration of the server device is shown. A display example when approaching SA / PA while displaying the branch guidance image is shown.

According to a preferred embodiment of the present invention, the display control device includes an acquisition unit for acquiring the current position of the moving body and a display control unit for displaying a guide image of the facility on the display unit. Is a first display control for displaying a guide image of a facility adjacent to the first road on a display unit when the moving body enters a predetermined range from a branch point branching into a first road and a second road. When it is recognized that the moving body is moving on the second road after passing through the branch point, the guide image is displayed for a predetermined time, and after the predetermined time has elapsed, the guide image is displayed. The second display control for erasing the display is performed.

The display control device has an acquisition unit and a display control unit. The acquisition unit acquires the current position of the moving body. The display control unit displays a guide image of the facility on the display unit, and performs the first display control and the second display control. In the first display control, the display control unit displays a guide image of a facility adjacent to the first road when the moving body enters within a predetermined range from the branch point branching into the first road and the second road. To display. In the second display control, when the display control unit recognizes that the moving body is moving on the second road after passing the branch point, it displays a guide image for a predetermined time, and the elapse of the predetermined time. Later, the display of the guidance image is erased.

In this aspect, the display control device displays a guide image for a predetermined time in consideration of the possibility of erroneous recognition even when it is determined that the vehicle is traveling on a second road different from the first road adjacent to the facility. The display of the guide image is erased after the lapse of the predetermined time. In this case, the "predetermined time" is set to, for example, a time at which erroneous recognition may occur. By doing so, the display control device can suitably suppress the erroneous erasure of the display of the guide image due to the erroneous recognition of the traveling road.

In one aspect of the display control device, when the display control unit recognizes that the moving body is moving on the first road before the predetermined time elapses, the predetermined time elapses. After that, the display of the guide image is maintained. According to this aspect, the display control device can appropriately make the user visually recognize the guide image when moving on the first road adjacent to the facility.

In another aspect of the display control device, the predetermined time is set by the angle formed by the first road and the second road. In general, the larger the angle between the first road and the second road, the more the first road and the second road branch in the direction away from each other, and it is possible to quickly determine which road is the driving road based on the current position. It is possible. Therefore, the display control device can be suitably determined so that the predetermined time is minimized by this aspect.

In another aspect of the display control device, the display control unit displays the guide image after the elapse of the predetermined time based on the speed change of the moving body before and after passing the branch point including the predetermined time. Decide whether or not to delete. In general, the speed change of the moving body differs depending on whether the vehicle is heading to the first road adjacent to the facility or the second road. Therefore, the display control device can suitably determine whether or not to erase the display of the guide image according to this aspect.

In another aspect of the display control device, the display control unit displays the guide image when the speed reduction of the moving body before and after passing through the branch point including the predetermined time is less than a predetermined threshold value. It is erased and the threshold value is set based on the angle formed by the first road and the second road. In general, the larger the angle between the first road and the second road, the more it is necessary to reduce the speed of the moving body when entering the first road adjacent to the facility. Therefore, the display control device can suitably determine whether or not to erase the display of the guide image according to this aspect.

In another aspect of the display control device, the predetermined time is the time until the moving body travels a predetermined distance. Also in this aspect, the display control device can preferably set a predetermined time.

In another aspect of the display control device, the facility is a service area or a parking area, and when the display control unit enters a predetermined range from the branch point, the facility is in the service area or the parking area. Is automatically displayed on the display unit as the guide image. According to this aspect, the display control device can display the map in the service area or the parking area at an appropriate timing, and can suitably improve the convenience.

According to another embodiment of the present invention, the control method executed by the display control device includes an acquisition step of acquiring the current position of the moving body, a display control step of displaying facility guidance information on the display unit, and the like. In the display control step, the display control device is adjacent to the first road when the moving body enters within a predetermined range from a branch point branching into a first road and a second road. When the first display control for displaying the guide image of the facility on the display unit and the recognition that the moving body is moving on the second road after passing the branch point, the guide image is displayed for a predetermined time. Is displayed, and after the lapse of the predetermined time, the display of the guide image is erased. By executing this control method, the display control device can suitably suppress the erroneous erasure of the display of the guide image due to the erroneous recognition of the traveling road.

According to still another embodiment of the present invention, the computer is a program executed by a computer, and the computer is used as an acquisition unit for acquiring the current position of a moving body and a display control unit for displaying facility guidance information on the display unit. The display control unit functions, and when the moving body enters within a predetermined range from the branch point branching into the first road and the second road, the display control unit displays a guide image of a facility adjacent to the first road. When it is recognized that the moving body is moving on the second road after passing through the branch point, the guide image is displayed for a predetermined time and the predetermined time is displayed. The second display control for erasing the display of the guide image after the elapse of the above is performed. By executing this program, the computer can suitably suppress the erroneous erasure of the display of the guidance image due to the erroneous recognition of the traveling road. Preferably, the program is stored in a storage medium.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[overall structure]
FIG. 1 shows a front view of a terminal device 100 to which the display control device according to the present invention is applied. The terminal device 100 is a portable terminal that can be carried by the user, and has a display 110 on which touch panels 120 are stacked. The terminal device 100 provides route guidance to a designated destination for pedestrians, vehicles, and the like.

FIG. 2 shows a schematic configuration of the terminal device 100. As shown in FIG. 2, the terminal device 100 includes an output unit 11, an input unit 12, a storage unit 13, a communication unit 14, a camera 15, a GPS receiver 16, and a control unit 17. Each element of the terminal device 100 is connected to each other via a bus 10, and is configured so that necessary information can be transmitted between the elements.

The output unit 11 includes a display 110, a speaker 111 that outputs voice, and the like, and outputs information for responding to an operation of a user of the terminal device 100 based on the control of the control unit 17. The input unit 12 is provided with a touch panel 120, and is an interface for receiving input of necessary commands and information, that is, an operation, to be performed by the terminal user to the terminal device 100. For example, the input unit 12 accepts an input for designating a destination, an input for specifying a route search condition, and the like. In addition to the touch panel 120, the input unit 12 may include keys, switches, buttons, a voice input device, and the like for inputting various commands and data.

The storage unit 13 stores a program for controlling the operation of the terminal device 100, and holds information necessary for the operation of the terminal device 100. For example, the storage unit 13 stores various data used for navigation processing such as map data. The map data includes road data represented by a link corresponding to a road and a node corresponding to a connecting portion (intersection) of the road, and a service area and a parking area (collectively referred to as "SA / PA"). ) And other facility information about each facility. Further, the storage unit 13 has, for each SA / PA, a link ID indicating a road connecting the main line of the expressway to the SA / PA (also referred to as a “side line”) and a link indicating the main line connecting to the side line. It is stored in association with the ID. Further, the storage unit 13 stores the road type information capable of distinguishing the above-mentioned lateral line, main line, etc. as a parameter of the road data. The lateral line is an example of the "first road" in the present invention, and the main line is an example of the "second road" in the present invention.

The communication unit 14 transmits / receives data to / from another device according to a predetermined protocol. For example, the communication unit 14 receives screen information or the like to be displayed on the display 110 from the server device via a network such as the Internet, based on the control of the control unit 17.

The camera 15 generates an image taken under the control of the control unit 17 and transmits it to the control unit 17. The GPS receiver 16 generates information on the current position of the terminal device 100 by receiving radio waves that carry downlink data including positioning data from a plurality of GPS satellites, and transmits the information to the control unit 17.

The control unit 17 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (not shown), and performs various controls on each component in the terminal device 100.

For example, the control unit 17 displays a map based on the current position output by the GPS receiver 18, and also displays information on facilities existing in the map. Further, the control unit 17 receives an input for designating a destination by the input unit 12, sets a route to the designated destination (also referred to as a “guidance route”), and provides guidance based on the guide route. The control unit 17 is an example of the “acquisition unit”, the “display control unit”, and the “computer” in the present invention.

[Basic explanation of facility display]
The control unit 17 controls the display of an image (also referred to as “map image Im”) showing the SA / PA facility map when traveling on the highway. The basic description of the display timing of the map image Im and the timing of erasing the display will be described below. The map image Im is an example of the "guide image" in the present invention.

(Display timing)
When the control unit 17 determines that the SA / PA is approached while traveling on the highway, the control unit 17 automatically displays the facility map of the approaching SA / PA on the display 110. As a result, the user is preferably allowed to visually recognize the detailed information of SA / PA that may stop by without requiring the user operation.

FIG. 3 shows a display example of the display 110 before determining that the service area “○ × SA” for the down lane has been approached. Further, FIG. 4 shows a display example of the display 110 when it is determined that the service area “○ × SA” for the down lane is approached. In the examples of FIGS. 3 and 4, it is assumed that the vehicle indicated by the current position mark 21 is traveling on the road 20 in the down lane connecting to the service area “○ × SA” for the down lane.

In FIG. 3, the control unit 17 refers to the map data based on the current position measured by the GPS receiver 16 to display a map of the surrounding area of the current position, and for the down lane existing in the displayed map. A balloon 22 indicating the position of the service area “○ × SA” is displayed on the display 110. In the balloon 22, the control unit 17 displays the facility icons 25 representing the facilities existing in the “◯ × SA” for the down vehicle side by side.

Then, in FIG. 4, the control unit 17 detects that the vehicle has approached the service area “○ × SA” for the down lane, and the map image Im showing the outline of the service area “○ × SA” for the down lane. Is displayed at the bottom of the display 110. The map image Im simply shows the arrangement of each facility in the service area "○ × SA" for the down lane together with the facility mark. As a result, the user can suitably grasp the position of each facility in the service area "○ × SA" for the down lane.

Here, an example will be given of a method of detecting that the user has approached the service area "○ × SA" for the down lane. For example, the control unit 17 refers to the map data, and if the link ID of the main line associated with the SA / PA matches the link ID of the road on which the vehicle is currently traveling, it determines that the vehicle has approached the SA / PA. .. This will be described with reference to FIG.

FIG. 5 is a conceptual diagram in which the current position of the vehicle in FIG. 4 is simply represented by the links “L1” to “L6” and the nodes “N1” to “N3”. In this case, the storage unit 13 provides a service area for the down lane with a link L4 indicating a side line connecting from the main lane to the service area "○ × SA" for the down lane and a link L2 indicating the main line connecting to the siding. It is stored in advance in association with "○ × SA". Then, when the vehicle is traveling on the road corresponding to the link L2, the control unit 17 determines that the link ID of the main line associated with the SA / PA matches the link ID of the road on which the vehicle is currently traveling. Judging, it is judged that the service area for the down lane "○ × SA" has been approached.

(Erase timing)
When the control unit 17 determines that the vehicle has passed the branch point between the siding and the main line to SA / PA (also referred to as "branch point Pb") and goes straight on the main line, or the confluence point between the siding and the main line (also referred to as "branch point Pb"). When it is determined that the vehicle has entered the main line after passing through the "merging point Pj"), the display of the map image Im is deleted in principle. This will be described with reference to FIGS. 6A and 6B.

6 (A) and 6 (B) show the transition of the current position when the display of the map image Im is erased.

In the example of FIG. 6 (A), the vehicle is from the link L2 indicating the road of the main lane immediately before reaching the siding which is the entrance to the service area "○ × SA" for the down lane, and the siding and the main lane after branching. We are moving to the link L3, which indicates the road. In this case, the control unit 17 recognizes that the vehicle is traveling on the main road indicated by the link L3, and erases the display of the map image Im. In this way, when the vehicle goes straight on the main lane after passing the branch point Pb indicated by the node N2 without passing through the siding that is the entrance to the service area "○ × SA" for the down lane, the control unit 17 maps. By erasing the display of the image Im, it is preferably prevented from displaying the map image Im unnecessarily. As will be described later, in consideration of the possibility of erroneous recognition of the traveling lane, the control unit 17 takes into consideration the possibility of erroneous recognition of the traveling lane, and the map image is displayed for a predetermined period from the time when it is first determined that the vehicle is traveling on the main road indicated by the link L3. Do not erase the Im display. This is discussed in detail in the Grace Period Settings section.

In the example of FIG. 6B, the link L5 indicating the siding that is the exit from the service area “○ × SA” for the down lane is moved to the link L6 indicating the road of the main line that merges with the siding. In this case, the control unit 17 erases the display of the map image Im when the vehicle enters the main line indicated by the link L6, that is, after the vehicle passes the confluence point Pj indicated by the node N3. In this way, the control unit 17 displays the map image Im until the vehicle returns to the main line, taking into consideration the possibility that the user carries the terminal device 100 in the SA / PA. This makes it possible to improve the convenience of the user when stopping at SA / PA.

[Grace period setting]
The control unit 17 displays the map image Im even when it is determined that the vehicle is traveling on the main line for a predetermined period (also referred to as “grace period Tex”) after passing the branch point Pb, which is a branch point between the main line and the lateral line. The map image Im is appropriately deleted after the grace period Tex has elapsed. As a result, it is surely suppressed that the display of the map image Im is erased while the lateral line is traveling due to the erroneous recognition of the traveling lane.

In the following, the first to fourth setting methods showing a specific method for setting the grace period Tex between the main line and the lateral line will be described in detail. The grace period Tex is an example of the "predetermined time" in the present invention.

(1st setting method)
In the first setting method, the control unit 17 sets the grace period Tex to a predetermined time width and stores it in the storage unit 13 or the like in advance. The above-mentioned predetermined time width is predetermined based on an experiment or the like, for example, a time width at which erroneous recognition of a traveling lane may occur.

In this case, after passing through the branch point Pb, the control unit 17 determines whether the vehicle is traveling on the siding or the main line based on the output of the GPS receiver 16 or the like. Then, the control unit 17 deletes the map image Im when it continuously recognizes that the traveling lane is the main lane after the passage of the branch point Pb and before the grace period Tex set to the predetermined time width elapses. To do. In other cases, that is, when the control unit 17 recognizes that the traveling lane is a lateral line after passing the branch point Pb and before the grace period Tex set to the predetermined time width elapses, the control unit 17 determines that the vehicle is a merging point. The map image Im is continuously displayed until it passes through Pj and returns to the main line.

When the control unit 17 determines that the traveling lane is the main lane based on the output of the GPS receiver 16 or the like when the grace period Tex set to the predetermined time width elapses after passing the branch point Pb, The map image Im may be deleted regardless of whether or not the traveling lane is continuously recognized as the main lane during the grace period Tex.

(Second setting method)
In the second setting method, instead of the first setting method, the control unit 17 sets the grace period Tex to the time width required for the vehicle to travel a predetermined distance. The above-mentioned predetermined distance is predetermined based on an experiment or the like, for example, at a distance from a branch point Pb where erroneous recognition of a traveling lane may occur.

In this case, when the control unit 17 continues to display the map image Im until the vehicle travels a predetermined distance from the branch point Pb, and continuously recognizes that the traveling lane is the main lane until the vehicle travels a predetermined distance from the branch point Pb. The map image Im is erased. On the other hand, when the control unit 17 recognizes that the traveling lane is a lateral line after passing the branch point Pb and traveling a predetermined distance, the control unit 17 continues the map image Im until the vehicle passes the confluence point Pj and returns to the main lane. indicate.

If the control unit 17 determines that the traveling lane is the main lane when the vehicle travels a predetermined distance after passing the branch point Pb, has the control unit 17 continuously recognized that the traveling lane is the main lane while traveling the predetermined distance? Regardless of whether or not, the map image Im may be deleted.

(Third setting method)
In the third setting method, the control unit 17 sets the predetermined time width or the predetermined distance used in the first setting method and the second setting method by the angle between the main line and the lateral line at the branch point Pb (also referred to as “branch angle Db”). Call.). This will be described with reference to FIG.

FIG. 7 is a diagram clearly showing the branch angle Db at the node N2 indicating the branch point Pb. In this case, the larger the branch angle Db, the more the main line indicated by the link L3 and the lateral line indicated by the link L4 extend in a direction away from each other according to the distance from the node N2 indicating the branch point Pb. Therefore, when the measurement accuracy of the current position by the GPS receiver 16 is constant, the larger the branch angle Db, the earlier the control unit 17 determines whether the traveling lane is the main lane or the lateral line after passing the branch point Pb. It is possible to conclude with.

In consideration of the above, the control unit 17 shortens the predetermined time width or the predetermined distance in the first setting method and the second setting method, and shortens the grace period Tex as the branch angle Db becomes larger. In other words, the control unit 17 lengthens the above-mentioned predetermined time width or predetermined distance and lengthens the grace period Tex as the branch angle Db becomes smaller. In this case, for example, the control unit 17 stores a map of a predetermined time width or a predetermined distance to be set for each branch angle Db in the storage unit 13 in advance, and when passing through the branch point Pb, road data or the like is stored. After calculating the branch angle Db with reference to the above, a predetermined time or a predetermined distance is determined with reference to the above map. As a result, the control unit 17 can accurately switch between displaying and hiding the map image Im while keeping the grace period Tex to the minimum necessary length.

(4th setting method)
In the fourth setting method, instead of the first to third setting methods, the control unit 17 draws a grace period Tex from the lateral line branching at the branch point Pb to the main line, and passes through the current position (also referred to as “vertical line VL”). It is set to the period until the length of (call) becomes a predetermined length. This will be described with reference to FIG.

FIG. 8 is a diagram showing a perpendicular line VL passing through the current position in the example of FIG. 7. As shown in FIG. 8, the vertical line VL becomes longer as the mileage from the node N2, which is the branch point Pb, becomes longer. Further, in general, the longer the vertical line VL is at the current position, the longer the distance to the main line or the side line where the vehicle does not exist, and the higher the recognition accuracy of the traveling lane based on the output of the GPS receiver 16.

In consideration of the above, the control unit 17 displays the map image Im until the perpendicular line VL reaches a predetermined length, and the traveling lane is set to the main lane based on the output of the GPS receiver 16 when the perpendicular line VL reaches a predetermined length. If it is determined that there is, the map image Im is deleted. On the other hand, when the control unit 17 determines that the traveling lane is a lateral line based on the output of the GPS receiver 16 when the vertical line VL reaches a predetermined length, the vehicle passes through the confluence point Pj and returns to the main line. The map image Im is continuously displayed until. As a result, the control unit 17 can accurately switch between displaying and hiding the map image Im while keeping the grace period Tex to the minimum necessary length, as in the third setting method.

[Effect of setting the grace period]
Here, the effect of providing the grace period Tex will be supplementarily described.

In general, a normal navigation device recognizes which road (that is, a link) the own vehicle is traveling on based on the own vehicle position information acquired from GPS or the like by a map matching technique. At this time, if a guide route is set, correction may be made so as to match the road on the route. Normally, expressway facilities such as SA / PA are not set as transit points for routes, so if the siding to the facility is close to the main line, even though the siding is actually running. There is a risk of misidentifying that you are traveling on the main line on the route. In addition, when a mobile terminal that does not have an independent positioning device other than GPS is used as a navigation device, the accuracy of map matching is lower than that of a stationary navigation device that has various independent positioning devices such as an angular velocity sensor. , There is a high possibility that the vehicle will be mistaken for traveling on the main line on the route even though it is traveling on the side line. In this way, in a situation where there is a possibility of misidentifying that you are traveling on the main line on the route even though you are traveling on the main line, if you judge that you have gone straight on the main line without passing through the siding, you will immediately map. When the display of the image Im is erased, there is a possibility that the display of the map image Im is unreasonably erased on the way to SA / PA due to erroneous recognition.

In consideration of the above, in the present embodiment, the control unit 17 provides a grace period Tex, and does not immediately erase the display of the map image Im even when it is determined that the map image Im has traveled straight without passing through the lateral line. As a result, it is possible to reliably prevent the display of the map image Im from being unreasonably erased while traveling on the lateral line due to erroneous recognition of the traveling lane.

[Modification example]
Hereinafter, each modification suitable for the above-described embodiment will be described. It should be noted that each of these modifications can be arbitrarily combined and applied to each of the above-described embodiments.

(Modification example 1)
Instead of the terminal device 100, a server device connected via a network may execute a part of the processing of the control unit 17.

FIG. 9 shows a configuration example of the system according to the modified example. As shown in FIG. 9, the terminal device 100 is connected to the server device 200 via the network 150. Then, the terminal device 100 performs route guidance and the like by receiving information necessary for route guidance from the server device 200.

FIG. 10 shows a schematic configuration of the server device 200. As shown in FIG. 10, the server device 200 includes a communication unit 202, a storage unit 203, and a control unit 204. The communication unit 202, the storage unit 203, and the control unit 204 are connected to each other via the bus line 201.

The communication unit 202 transmits and receives various data via the network 150 based on the control of the control unit 204. The storage unit 203 is composed of, for example, an HDD or the like, and stores data necessary for route search or the like such as map data. The control unit 204 has a memory such as a CPU, a ROM, and a RAM, and performs general control of the server device 200 by executing a program stored in the memory.

In this case, the control unit 204 displays the map image Im described in each section of [Basic explanation of facility display] and [Setting of grace period] based on, for example, the current position information transmitted from the terminal device 100. The non-display determination process is performed, and information instructing the display / non-display of the map image Im is transmitted to the terminal device 100. In this case, the control unit 204 may generate display information of the screen to be displayed on the display 110 and transmit it to the terminal device 100 to display each display screen shown in FIG. 4 or the like on the display 110.

In this way, even when the server device 200 executes a part of the processing of the control unit 17, the terminal device 100 can display the map image Im at an appropriate timing. The processing of the server device 200 may be executed by a server system including a plurality of server devices. Then, in the present modification, the server device 200 functions as the "display control device" in the present invention, and the control unit 204 functions as the "computer" in the present invention.

(Modification 2)
Instead of identifying whether the traveling lane is the main lane or the siding based on the current position measured by the GPS receiver 16, the control unit 17 identifies whether the traveling lane is the main lane or the siding based on the change in vehicle speed during the grace period Tex. You may.

Specifically, when the degree of deceleration of the vehicle speed in the grace period Tex is equal to or higher than a predetermined threshold value, the control unit 17 determines that a speed decrease due to the progress to the lateral line has occurred, and the vehicle travels on the lateral line. It is considered to be inside, and the display of the map image Im is continued. On the other hand, the control unit 17 keeps the vehicle running on the main line when the degree of deceleration of the vehicle speed in the grace period Tex is less than a predetermined threshold value, that is, when there is a speed increase or there is almost no speed change. It is considered that there is, and the display of the map image Im is deleted. The degree of deceleration described above may be the speed difference between the start and end of the grace period Tex, or may be the average decrease rate of the vehicle speed within the grace period Tex. In this case, the grace period Tex is predetermined based on an experiment or the like with a time width suitable for determining whether the traveling lane is a lateral line or a main lane based on, for example, a change in vehicle speed.

It is preferable that the control unit 17 determines the above-mentioned threshold value based on the branch angle Db. Specifically, the control unit 17 determines that the larger the branch angle Db, the greater the decrease in speed due to the entry of the lateral line, and increases the threshold value. In other words, the control unit 17 determines that the smaller the branch angle Db, the smaller the decrease in speed due to the entry of the lateral line, and reduces the threshold value. As a result, the control unit 17 can accurately determine the above-mentioned threshold value.

In addition to the grace period Tex after passing the branch point Pb, the control unit 17 may also add a predetermined time before passing the branch point Pb to the target of the period for measuring the degree of deceleration of the vehicle speed. In this case, the control unit 17 deletes the map image Im when the degree of deceleration of the vehicle speed in the predetermined period before and after passing the branch point Pb including the grace period Tex is less than the predetermined threshold value. As a result, the control unit 17 can preferably consider deceleration immediately before entering the lateral line.

(Modification 3)
Instead of identifying whether the traveling lane is the main lane or the lateral line based on the current position measured by the GPS receiver 16, the control unit 17 determines the traveling lane based on the image taken by the camera 15 directed to the front of the vehicle. You may identify whether it is a main line or a lateral line.

In this case, the control unit 17 performs image recognition processing on the image obtained from the camera 15 and determines whether or not there is a lane change to the lateral line before and after passing through the branch point Pb. Then, when the control unit 17 recognizes the lane change to the siding before and after passing the branch point Pb, the control unit 17 continues to display the map image Im, and when it does not recognize the lane change to the siding before and after passing the branch point Pb, The control unit 17 erases the display of the map image Im.

Here, a supplementary description will be given of a method of recognizing a lane change to a lateral line based on an image taken by the camera 15. For example, the control unit 17 compares the number of lanes of the main lane recognized based on the map data with the number of lanes of the traveling road recognized based on the image of the camera 15, and determines that the latter number of lanes is one more. Sometimes we recognize that the leftmost lane is the side lane. Then, when the control unit 17 recognizes the lane change to the leftmost lane based on the time-series image supplied from the camera 15, it determines that the vehicle has moved to the lateral line.

(Modification example 4)
In addition to the deletion timing of the map image Im described with reference to FIG. 5, the control unit 17 also refers to an image showing the traveling direction at a junction (JCT), an interchange (IC), or the like (also referred to as a “branch guide image Ib”). ) Should be displayed, the display of the map image Im may be deleted in order to preferentially display the branch guidance image Ib. Specifically, when it is time to display the branch guide image Ib while the map image Im is being displayed, the control unit 17 deletes the map image Im and displays the branch guide image Ib. Further, the control unit 17 continuously displays the branch guide image Ib and erases the display of the branch guide image Ib even when it is time to display the map image Im while the branch guide image Ib is being displayed. The map image Im is not displayed until the desired timing.

FIG. 11 shows a display example of the display 110 when the branch guide image Ib is displayed and the SA / PA is approached. In the example of FIG. 11, the vehicle is approaching both the service area “XXSA” for the down lane indicated by the balloon 28 and the branch point “XXJCT” indicated by the balloon 29, and the service for the down lane. Both the map image Im corresponding to the area "XX SA" and the branch guide image Ib corresponding to the branch point "XX JCT" should be displayed. In this case, as shown in FIG. 11, the control unit 17 gives priority to the branch guide image Ib and does not display the map image Im. As a result, the control unit 17 can surely make the driver recognize the traveling direction at the branch point.

(Modification 5)
The terminal device 100 is not limited to a portable terminal such as a smartphone as shown in FIG. 1, and may be a stationary navigation device installed in a vehicle. In this case, the control unit of the navigation device performs the same display control as the control unit 17 on the display of the navigation device.

10 Bus 11 Output unit 12 Input unit 13 Storage unit 14 Communication unit 15 Camera 16 GPS receiver 17 Control unit 100 Terminal device 110 Display 120 Touch panel 150 Network 200 Server device

Claims (1)

The acquisition unit that acquires the current position of the moving body,
A display control unit that displays a facility guide image on the display unit,
With
The display control unit
The first display control for displaying a guide image of a facility adjacent to the first road on the display unit when the moving body enters within a predetermined range from a branch point branching into the first road and the second road.
When it is recognized that the moving body is moving on the second road after passing through the branch point, the guide image is displayed for a predetermined time, and the guide image is displayed after the predetermined time has elapsed. The second display control to be erased and
A display control device characterized by performing.

Images