JP2018091864A - Display control device, control method, program, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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 guidance image of a facility.

  2. Description of the Related Art Conventionally, a technology for displaying information on facilities (also referred to as “highway facilities”) associated with a highway such as a parking area or a service area in a navigation device or the like mounted on an automobile is known. For example, Patent Document 1 discloses a technique for displaying a predetermined number of guidance boxes indicating guidance information for each facility in order from the facility closest to the current position on a straight line figure simulating an expressway. Furthermore, Patent Document 1 also describes that when displaying guidance information for interchanges and junctions, guidance information is displayed when approaching these points.

JP 2008-267820 A

  The highway facility guidance information is preferably displayed when approaching the facility to some extent and then deleted at an appropriate timing. However, Patent Document 1 has no description or suggestion about the erasure timing of the guidance information.

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

  The invention described in claim is a display control device, comprising: an acquisition unit that acquires a current position of a moving object; and a display control unit that displays a facility guidance image on a display unit, wherein the display control unit includes: A first display control for displaying a guidance image of a facility adjacent to the first road on a display unit when the mobile body enters a predetermined range from a branch point where the mobile body branches to the first road and the second road; When the mobile body recognizes that it has moved 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. And second display control for erasing the image.

  Further, the invention described in the claims is a control method executed by the display control device, and includes an acquisition step of acquiring a current position of a moving body, and a display control step of displaying facility guidance information on a display unit. And in the display control step, the display control device is a facility adjacent to the first road when the mobile body enters a predetermined range from a branch point where the mobile body branches to the first road and the second road. First display control for displaying the guidance image on the display unit, and when the moving body recognizes that the moving body is moving on the second road after passing the branch point, the guidance image is displayed for a predetermined time. And a second display control for performing display and erasing the display of the guide image after the predetermined time has elapsed.

  The invention described in the claims is a program executed by a computer, which causes the computer to function as an acquisition unit that acquires a current position of a moving body and a display control unit that displays guidance information on a facility on a display unit. The display control unit displays a guidance image of a facility adjacent to the first road on the display unit when the mobile body enters a predetermined range from a branch point where the mobile body branches to the first road and the second road. When the first display control to be performed and the moving body recognizes that it has moved on the second road after passing through the branch point, the guide image is displayed for a predetermined time, and the passage of the predetermined time And a second display control for erasing the display of the guide image later.

The front view of a terminal device is shown. The schematic structure of a terminal device is shown. A display example immediately before determining that the service area “◯ × SA” has been approached is shown. A display example when it is determined that the service area “◯ × SA” has been approached is shown. It is the conceptual diagram which represented the present position of the vehicle simply by the link and the node. The transition of the current position when deleting the display of the facility map image is shown. It is the figure which clarified the branch angle in the example of FIG.5 and FIG.6. It is the figure which specified the perpendicular which passes through the present position in the example of FIG. The structural example of the system which concerns on a modification is shown. 1 shows a schematic configuration of a server device. The example of a display when approaching SA / PA during the display of a branch guidance image is shown.

  According to a preferred embodiment of the present invention, the display control device includes an acquisition unit that acquires the current position of the moving body, and a display control unit that displays a facility guidance image 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 where the mobile body branches to the first road and the second road. When the mobile body recognizes that it has moved 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. Second display control for erasing the display is performed.

  The display control apparatus includes an acquisition unit and a display control unit. The acquisition unit acquires the current position of the moving object. The display control unit displays a facility guidance image on the display unit, and performs first display control and second display control. In the first display control, the display control unit displays a guidance image of a facility adjacent to the first road when the moving body enters a predetermined range from a branch point that branches 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, the display image is displayed for a predetermined time, and the elapse of the predetermined time. The display of the guide image is erased later.

  In this aspect, the display control device displays a guidance image for a predetermined time in consideration of the possibility of misrecognition 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 predetermined time has elapsed. In this case, the “predetermined time” is set to a time when there is a possibility of erroneous recognition, for example. By doing in this way, the display control apparatus can suppress suitably deleting the display of a guidance image accidentally resulting from the misrecognition of a 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 apparatus can cause the user to appropriately 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 an 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 away from each other, and it is possible to quickly determine which road is the driving road based on the current position. Is possible. Therefore, the display control apparatus can be suitably determined so that the predetermined time becomes the minimum necessary according to this aspect.

  In another aspect of the display control device, the display control unit displays the guide image after the predetermined time has elapsed based on a change in speed of the moving body before and after passing through the branch point including the predetermined time. To decide whether to delete. In general, the speed change of the moving object differs between when going to the first road adjacent to the facility and when going to the second road. Therefore, the display control apparatus can preferably determine whether or not to delete 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 a decrease in speed of the moving body before and after passing through the branch point including the predetermined time is less than a predetermined threshold. The threshold value is deleted, and the threshold value is set based on an 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 lower the speed of the moving body when entering the first road adjacent to the facility. Therefore, the display control apparatus can preferably determine whether or not to delete the display of the guide image according to this aspect.

  In another aspect of the display control apparatus, the predetermined time is a time until the moving body travels a predetermined distance. Also according to this aspect, the display control apparatus can suitably determine the predetermined time.

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

  According to another embodiment of the present invention, a display control device executes a control method, an acquisition step of acquiring a current position of a mobile body, a display control step of displaying facility guidance information on a display unit, In the display control step, the display control device is adjacent to the first road when the moving body enters a predetermined range from a branch point where the mobile body branches to the first road and the second road. When the first display control for displaying the facility guidance image on the display unit and the moving body recognizes that the vehicle is moving on the second road after passing through the branch point, the guidance image is displayed for a predetermined time. And the second display control for deleting the display of the guide image after the predetermined time has elapsed. By executing this control method, the display control device can suitably suppress erroneous display of the guide image due to erroneous recognition of the traveling road.

  According to still another embodiment of the present invention, a computer program is executed by the computer as an acquisition unit that acquires a current position of a moving body and a display control unit that displays facility guidance information on a display unit. The display control unit is configured to display a guidance image of a facility adjacent to the first road when the moving body enters a predetermined range from a branch point where the mobile body branches to the first road and the second road. The first display control to be displayed, and when the moving body recognizes that it has moved on the second road after passing the branch point, the guide image is displayed for a predetermined time, and the predetermined time And second display control for erasing the display of the guide image after elapse of time. By executing this program, the computer can preferably suppress erroneously deleting the display of the guide image due to 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 is a front view of a terminal device 100 to which a display control device according to the present invention is applied. The terminal device 100 is a portable terminal that can be carried by a user, and includes a display 110 on which a touch panel 120 is stacked. The terminal device 100 provides route guidance to a designated destination for pedestrians and vehicles.

  FIG. 2 shows a schematic configuration of the terminal device 100. As illustrated 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. The elements of the terminal device 100 are connected to each other via the bus 10 so that necessary information can be transmitted between the elements.

  The output unit 11 includes a display 110 and a speaker 111 that outputs sound, and outputs information for responding to the operation of the user of the terminal device 100 based on the control of the control unit 17. The input unit 12 is an interface that includes a touch panel 120 and accepts input of necessary instructions and information, that is, operations performed by the terminal user to the terminal device 100. For example, the input unit 12 receives an input for specifying 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, voice input devices, 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 is road data represented by links corresponding to roads and nodes corresponding to road connecting portions (intersections), service areas and parking areas (these are also collectively referred to as “SA / PA”). ) And other facilities information about each facility. The storage unit 13 also has, for each SA / PA, a link ID indicating a road (also referred to as a “side line”) connected to the SA / PA from the main line of the expressway, and a link indicating the main line connected to the side line. The ID is stored in association with each other. In addition, the storage unit 13 stores road type information that can distinguish the above-described side lines, main lines, and the like as road data parameters. The side 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 other devices according to a predetermined protocol. For example, the communication unit 14 receives screen information 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 a photographed image based on the control of the control unit 17 and transmits the image to the control unit 17. The GPS receiver 16 receives radio waves carrying downlink data including positioning data from a plurality of GPS satellites, thereby generating information on the current position of the terminal device 100 and transmitting 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 with the current position output from the GPS receiver 18 as a base point, and also displays information on facilities existing in the map. In addition, 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 “guidance route”), and performs guidance based on the guidance route. The control unit 17 is an example of the “acquisition unit”, “display control unit”, and “computer” in the present invention.

[Basic explanation of facility display]
The control unit 17 performs display control of an image (also referred to as “map image Im”) indicating the SA / PA facility map when traveling on the highway. Below, the basic description regarding the display timing of the map image Im and the timing which erase | eliminates a display is given. 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 vehicle is approaching the SA / PA when traveling on the expressway, the control unit 17 automatically displays the approaching SA / PA facility map on the display 110. Thereby, the user is preferably made to visually recognize the detailed information of the SA / PA that may drop in without requiring a user operation.

  FIG. 3 shows a display example on the display 110 before determining that the service area “◯ × SA” for the down lane is approaching. FIG. 4 shows a display example of the display 110 when it is determined that the service area “◯ × SA” for the down lane is approaching. 3 and 4, it is assumed that the vehicle indicated by the current position mark 21 is traveling on the road 20 on the down lane connected 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 and displays a map around the current position, and for the down lane present 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 “◯ × SA” for getting off the vehicle.

  In FIG. 4, the control unit 17 detects that the vehicle has approached the service area “◯ × SA” for the down lane, and displays a map image Im showing an 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. Thereby, the user can preferably grasp the position of each facility in the service area “◯ × SA” for the down lane.

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

  FIG. 5 is a conceptual diagram schematically showing the current position of the vehicle in FIG. 4 by links “L1” to “L6” and nodes “N1” to “N3”. In this case, the storage unit 13 sets the link L4 indicating the side line connecting from the main line to the service area “◯ × SA” for the down lane and the link L2 indicating the main line connected to the side line for the service area for the down lane. 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 matches the link ID of the main line associated with SA / PA and the link ID of the road on which the vehicle is currently traveling. It is determined that the vehicle has approached the service area “○ × SA” for the down lane.

(Erase timing)
When the control unit 17 determines that the vehicle has passed the branch line between the side line to the SA / PA and the main line (also referred to as “branch point Pb”), or has traveled straight on the main line, or the junction point between the side line and the main line ( If 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. 6 (A) and 6 (B).

  6A and 6B 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 connected to the main line after branching from the link L2 indicating the main road just before reaching the side line that becomes the entrance to the service area “○ × SA” for the down lane. It moves to the link L3 which shows this road. In this case, the control unit 17 recognizes that the vehicle is traveling on the main road indicated by the link L3, and deletes the display of the map image Im. As described above, when the vehicle travels straight on the main line through the branch point Pb indicated by the node N2 without passing through the side line that becomes the entrance to the service area “◯ × SA” for the down lane, the control unit 17 By erasing the display of the image Im, it is preferable to prevent the map image Im from being displayed unnecessarily. As will be described later, the control unit 17 takes into consideration the possibility of misrecognition of the travel lane, and during the predetermined period from the first determination that the main road indicated by the link L3 is traveling. Im display is not deleted. This is explained in more detail in the section “Setting the grace period”.

  In the example of FIG. 6B, the vehicle moves from a link L5 indicating a side line serving as an exit from the service area “◯ × SA” for the down lane to a link L6 indicating a main road that merges with the side line. 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 junction Pj indicated by the node N3. As described above, the control unit 17 displays the map image Im until the vehicle returns to the main line in consideration of the possibility of the user carrying the terminal device 100 within the SA / PA. Thereby, the convenience of the user when stopping at SA / PA can be improved.

[Set grace period]
The control unit 17 displays the map image Im even if it is determined that the vehicle is traveling on the main line during 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 side line. The map image Im is appropriately deleted after the grace period Tex has elapsed. This reliably prevents the display of the map image Im from being erased while the side line is traveling due to erroneous recognition of the traveling lane.

  Below, the 1st-4th setting method which shows the setting method of the concrete grace period Tex with a specific main line and a side line is demonstrated in detail. The grace period Tex is an example of the “predetermined time” in the present invention.

(First setting method)
In the first setting method, the control unit 17 sets the grace period Tex to a predetermined time width that is set in advance, and stores it in the storage unit 13 or the like in advance. The predetermined time width is determined in advance based on an experiment or the like, for example, in a time width in which erroneous recognition of the 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 side line or the main line based on the output of the GPS receiver 16 or the like. When the control unit 17 continues to recognize that the traveling lane is the main line before the grace period Tex set to the predetermined time interval elapses after passing the branch point Pb, the control unit 17 deletes the map image Im. To do. In other cases, that is, when the traveling lane is recognized as a side line by the time the grace period Tex set to the predetermined time width elapses after passing through the branch point Pb, the control unit 17 determines that the vehicle is a junction. 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 line based on the output of the GPS receiver 16 at the time when the grace period Tex set to the predetermined time width has elapsed after passing through 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 line 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 a time width required for the vehicle to travel a predetermined distance. The above-mentioned predetermined distance is determined in advance based on an experiment or the like, for example, a distance from the branch point Pb where erroneous recognition of the traveling lane may occur.

  In this case, 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 travel lane is the main line until the vehicle travels a predetermined distance from the branch point Pb. In this case, the map image Im is deleted. On the other hand, when the traveling lane is recognized as a side line by traveling a predetermined distance after passing through the branch point Pb, the control unit 17 continues the map image Im until the vehicle passes through the junction Pj and returns to the main line. indicate.

  If the control unit 17 determines that the travel lane is the main line after traveling for a predetermined distance after passing through the branch point Pb, has the controller 17 continuously recognized that the travel lane is the main line during travel of 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 determines the predetermined time width or the predetermined distance used in the first setting method and the second setting method as an angle between the main line and the side line at the branch point Pb (also referred to as “branch angle Db”). ). 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 longer the main line indicated by the link L3 and the side line indicated by the link L4 are 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 greater the branch angle Db, the earlier the control unit 17 determines whether the traveling lane is a main line or a side line after passing the branch point Pb. Can be determined.

  Considering the above, as the branch angle Db is larger, 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. In other words, the control unit 17 increases the predetermined time width or the predetermined distance and the grace period Tex as the branch angle Db is 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 road data or the like when passing through the branch point Pb. After calculating the branch angle Db with reference to, the predetermined time or the predetermined distance is determined with reference to the above-mentioned map. Thereby, the control part 17 can switch the display and non-display of the map image Im exactly, making the grace period Tex the required minimum length.

(Fourth setting method)
In the fourth setting method, instead of the first to third setting methods, the control unit 17 sets the grace period Tex to a vertical line ("vertical line VL") that passes through the current position drawn from the side line that branches at the branch point Pb to the main line. Is set to a period until the length becomes a predetermined length. This will be described with reference to FIG.

  FIG. 8 is a diagram clearly showing the perpendicular VL passing through the current position in the example of FIG. As shown in FIG. 8, the vertical line VL becomes longer as the travel distance from the node N2 that is the branch point Pb becomes longer. 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.

  Considering the above, the control unit 17 displays the map image Im until the vertical line VL has a predetermined length, and the traveling lane is the main line based on the output of the GPS receiver 16 when the vertical line VL has 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 side line based on the output of the GPS receiver 16 when the vertical line VL has a predetermined length, the vehicle passes the junction Pj and returns to the main line. Until the map image Im is displayed. Thereby, like the third setting method, the control unit 17 can accurately switch between display and non-display of the map image Im while setting the grace period Tex to the minimum necessary length.

[Effect of grace period setting]
Here, a supplementary explanation will be given of the effect of providing the grace period Tex.

  In general, a normal navigation device recognizes on which road (that is, a link) the vehicle is traveling based on the vehicle position information acquired from GPS or the like by map matching technology. At this time, if a guide route is set, correction may be made to match a road on the route. Normally, an expressway facility such as SA / PA is not set as a route transit point, so if the side line to the facility is close to the main line, it is actually traveling on the side line. There is a risk of misunderstanding 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 angular velocity sensors. There is a high possibility of misunderstanding that the vehicle is traveling on the main line on the route even though the vehicle is traveling on the side line. In this way, it is possible to misunderstand that you are driving the main line on the route even though you are driving the main line. When the display of the image Im is erased, there is a possibility that the display of the map image Im is unduly erased while heading for SA / PA due to erroneous recognition.

  Considering the above, in the present embodiment, the control unit 17 does not erase the display of the map image Im immediately even if it is determined that the grace period Tex is provided and the main line is traveled straight without passing through the side line. As a result, it is possible to reliably prevent the display of the map image Im from being unduly erased during traveling on the side line due to erroneous recognition of the traveling lane.

[Modification]
Hereinafter, each modification suitable for the above-described embodiment will be described. These modifications can be applied to the above-described embodiments in any combination.

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

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

  FIG. 10 shows a schematic configuration of the server apparatus 200. As illustrated 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 configured by, for example, an HDD and stores data necessary for route search and the like such as map data. The control unit 204 has a memory such as a CPU, a ROM, and a RAM, and performs overall 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 description of facility display] and [Setting of grace period] based on the current position information transmitted from the terminal device 100, for example. A non-display determination process is performed, and information indicating the display and non-display of the map image Im is transmitted to the terminal device 100. In this case, the control unit 204 may cause each display screen shown in FIG. 4 or the like to be displayed on the display 110 by generating display information of a screen to be displayed on the display 110 and transmitting the display information to the terminal device 100.

  Thus, even if 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. Note that the processing of the server device 200 may be executed by a server system including a plurality of server devices. In this modification, the server device 200 functions as a “display control device” in the present invention, and the control unit 204 functions as a “computer” in the present invention.

(Modification 2)
Instead of identifying whether the travel lane is a main line or a side line based on the current position measured by the GPS receiver 16, the control unit 17 identifies whether the travel lane is a main line or a side line based on a change in vehicle speed during the grace period Tex. May be.

  Specifically, when the degree of deceleration of the vehicle speed during the grace period Tex is equal to or greater than a predetermined threshold, the control unit 17 determines that a speed decrease due to progress to the side line has occurred, and the vehicle travels on the side line. The map image Im is displayed continuously. On the other hand, when the degree of deceleration of the vehicle speed in the grace period Tex is less than a predetermined threshold, that is, when there is a speed increase or there is almost no speed change, the control unit 17 continues to travel on the main line. Assuming that there is a map image Im, the display is erased. The degree of deceleration described above may be a speed difference between the start and end of the grace period Tex, or may be an average reduction rate of the vehicle speed within the grace period Tex. In this case, the grace period Tex is determined in advance based on experiments or the like with a time width suitable for determining whether the traveling lane is a side line or a main line based on a change in the vehicle speed.

  Preferably, the control unit 17 may determine the above-described threshold based on the branch angle Db. Specifically, the control unit 17 determines that the speed decrease due to the approach of the side line is larger as the branch angle Db is larger, and increases the threshold value. In other words, the control unit 17 determines that the speed decrease due to the approach of the side line is smaller as the branch angle Db is smaller, and decreases the threshold value. Thereby, the control part 17 can determine the above-mentioned threshold value correctly.

  In addition to the grace period Tex after passing through the branch point Pb, the control unit 17 may add the predetermined time before passing through the branch point Pb to the target of the period during which the degree of deceleration of the vehicle speed is measured. In this case, the control unit 17 deletes the map image Im when the degree of deceleration of the vehicle speed in a predetermined period before and after passing through the branch point Pb including the grace period Tex is less than a predetermined threshold. Thereby, the control part 17 can consider suitably the deceleration just before approaching a side line.

(Modification 3)
Instead of identifying whether the traveling lane is a main line or a side line based on the current position measured by the GPS receiver 16, the control unit 17 determines whether the traveling lane is based on an image taken by the camera 15 facing the front of the vehicle. The main line or the side line may be identified.

  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 side line before and after passing through the branch point Pb. When the lane change to the side line is recognized before and after the passage of the branch point Pb, the control unit 17 continues to display the map image Im and does not recognize the lane change to the side line before and after the passage of 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 for recognizing a lane change to a side line based on an image captured by the camera 15. For example, the control unit 17 compares the number of lanes on the main line recognized based on the map data with the number of lanes on the running road recognized based on the image of the camera 15, and determines that the latter lane number is one more. Sometimes it recognizes that the leftmost lane is a side line. Then, based on the time-series image supplied from the camera 15, the control unit 17 determines that the vehicle has moved to the side line when recognizing a lane change to the leftmost lane.

(Modification 4)
In addition to the erasing timing of the map image Im described in FIG. 5, the control unit 17 also refers to an image indicating a traveling direction at a branch point such as a junction (JCT) or an interchange (IC) (also referred to as “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 displaying the map image Im, 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 guidance image Ib and erases the display of the branch guidance image Ib even when it is time to display the map image Im while displaying the branch guidance image Ib. The map image Im is not displayed until the timing to be performed.

  FIG. 11 shows a display example of the display 110 when approaching SA / PA while displaying the branch guidance image Ib. 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 guidance image Ib corresponding to the branch point “XXJCT” are to be displayed. In this case, as shown in FIG. 11, the control unit 17 displays the branch guidance image Ib with priority and does not display the map image Im. Thereby, the control part 17 can make a driver | operator recognize reliably the advancing direction in a branch point.

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

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

Claims (1)

An acquisition unit for acquiring the current position of the moving object;
A display control unit for displaying a guidance image of the facility on the display unit;
With
The display control unit
A first display control for displaying a guidance image of a facility adjacent to the first road on a display unit when the mobile body enters a predetermined range from a branch point where the mobile body branches to 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. A second display control to be erased;
A display control device.

Images