JP5615615B2 - Car-mounted navigation device and driving support information presentation method - Google Patents

Description

  The present invention relates to an in-vehicle navigation apparatus and a driving support information presentation method, and more particularly, to determine which of traffic information guidance and guidance by a navigation function is important, and to be equipped with a function capable of presenting important guidance with priority. The present invention relates to a navigation device and a driving support information presentation method.

  Conventional typical vehicle-mounted navigation devices include a control device such as a CPU that controls all processes related to navigation, a storage device such as a DVD (Digital Versatile Disk) -ROM or an IC memory card that stores map data in advance, It has a display device, a GPS (Global Positioning System) receiver, a detection device for detecting the current position and current direction of the vehicle, such as a gyroscope and a vehicle speed sensor. Then, the control device reads out map data including the current position of the vehicle from the storage device, displays a map image around the vehicle position on the display device screen based on the map data, and indicates the current position of the host vehicle. The vehicle position mark to be displayed is superimposed on the map image, the map image is scrolled according to the movement of the vehicle, the map image is fixed on the screen and the vehicle position mark is moved, and where the vehicle is currently located. You can see at a glance whether you are driving.

  The vehicle-mounted navigation device is usually equipped with a function (route guidance function) for guiding the user so that the user can easily travel on the road without making a mistake. According to this route guidance function, the optimal route (typically the route with the lowest cost) that connects from the departure point (typically the current position of the vehicle) to the destination using the map data by the control device. Is automatically searched by performing simulation calculation such as horizontal search method or Dijkstra method, and the searched route is stored as a guide route, and the guide route can be distinguished from other roads on the map image while driving (For example, change the color or increase the line width), or when the vehicle approaches a predetermined distance to the intersection where the course should be changed on the guidance route, the intersection on the map image By displaying a guide map (enlarged view of the intersection, an arrow indicating the direction of travel at the intersection, the distance to the intersection, the name of the intersection, etc.) In which direction to go The user is to be able to grasp.

  Also, in-vehicle navigation devices use VICS (registered trademark) (Vehicle Information and Communication System) to acquire traffic information such as traffic jams and accidents in real time. VICS transmits road traffic information collected and edited by the Road Traffic Information Communication System Center through FM multiplex broadcasting, and provides information such as traffic jams, accident information, required time, speed regulation, etc. Yes.

  As a technique for displaying and outputting the guidance information by the navigation device and the traffic information acquired by VICS, Patent Document 1 is close to the request timing of the interrupt display of the intersection enlarged view and the request timing of the traffic information interrupt display. It is described that priority is given to the display of an enlarged intersection view.

  Patent Document 2 describes that when traffic information provided from a VICS and received via a beacon does not include traffic jam information, interrupt display of the road traffic information is prohibited.

  Further, Patent Document 3 describes that driving support information is provided with priority over navigation information, and the navigation information is provided by being shifted outside the section for which driving support information is provided.

  Patent Document 4 describes that simple graphic information is not displayed when there is no display portion of a traffic jam location or a congested location in the VICS simple graphic information.

  Patent Document 5 describes that an enlarged map of a branch point and traffic information sent from outside are simultaneously displayed when the vehicle approaches a branch point on the guidance route to a certain distance. ing.

Japanese Patent Laid-Open No. 10-047979 JP 2000-250407 A JP 2004-184230 A JP 2004-354212 A JP 2005-114556 A

  As described above, in the navigation apparatus, a location where traffic congestion has occurred can be acquired by a system that notifies traffic conditions such as VICS, and the location can be avoided.

  In recent years, safe driving support using DSRC (Dedicated Short Range Communication) has been studied as part of ITS (Intelligent Transport Systems) technology. By connecting the DSRC device to the navigation device and displaying the VICS information by DSRC received from the roadside device on the screen, it is possible to grasp the traffic situation and the like.

  Such traffic information by VICS has a higher priority to be provided to the user than guidance information by the navigation device. For this reason, even when the navigation device is performing route guidance and when displaying detailed guidance information such as intersections, this traffic information is displayed when traffic information is acquired by VICS. End up.

  If traffic information is displayed in such a manner as to overlap with guidance information at an intersection in this way, it is possible that the guidance for changing the traveling direction is missed and the route is mistakenly traveled.

  The present invention has been made in view of the problems of the prior art, and is a vehicle-mounted navigation device capable of selecting and displaying information important for the user from detailed guidance information in route guidance and traffic information by VICS. It is another object of the present invention to provide a driving support information presentation method.

In order to solve the above-described problems of the prior art, according to the basic form of the present invention, display means, own vehicle position detecting means for detecting the current position of the own vehicle, and traffic information sent from the outside of the own vehicle The traffic information acquisition means for acquiring the vehicle and the guidance route to the instructed destination are searched, and the route guidance information is displayed on the screen of the display means according to the current position of the own vehicle detected by the own vehicle position detection means. Control means for guiding the destination along the guide route to the destination, and the control means is an event occurrence point that is a target of the traffic information and a target of display of an enlarged guide map in the route guidance information. A guide point to be obtained is determined, the importance of the traffic information for the host vehicle and the importance of the route guidance information are determined, and at least either the guide map in the traffic information or the enlarged guide map depending on the importance And displaying the driving support information by the screen of the display unit, the reference to the current position of the vehicle acquired by the vehicle position detecting means, when the guide point is in front of the said event occurrence point, The importance of the route guidance information is set higher than the importance of the traffic information, and when the event occurrence point is in front of the guidance point, the importance of the traffic information is set as the importance of the route guidance information. An in-vehicle navigation device characterized by being set higher than the above is provided.

In-vehicle navigation apparatus according to this embodiment, before Symbol control means may be displayed in a predetermined display start time driving support information by high the importance information, the control means, the important Even when the driving support information based on the high-level information is displayed, even when the display of the driving support information based on the low-level information starts, the display of the driving support information based on the high-level information is continued. In the state where the driving support information based on the low importance information is displayed, when the driving support information based on the high importance information is displayed, the driving support information based on the high importance information is displayed. You may make it switch and display.

  Moreover, in the vehicle-mounted navigation device according to this aspect, the control means travels in the direction of the event occurrence point while the host vehicle is off-routes the guidance route while the enlarged guide map is displayed. In this case, the enlarged guide map may be deleted and the traffic information guide map displayed, and the control means may display the traffic information guide map while the vehicle is When the guide route is off-routed and travels in a direction different from the event occurrence point, the traffic information guide map may be erased. The enlarged guide map in the route guide information is the guide route You may make it be an enlarged guide map of the upper guidance intersection.

According to another aspect of the present invention, in the driving support information presentation method performed in the in-vehicle navigation device having display means, own vehicle position detection means, traffic information acquisition means, and control means, the control means, the steps of searching for a guide route to the designated destination, said at vehicle position detecting means, detecting a current position of the vehicle, said control means, detected by the vehicle position detecting means obtaining a step of the route guidance information corresponding to the current position of the vehicle is displayed on the screen of the display unit for guiding to the destination, in the traffic information acquiring section, a traffic information sent from the vehicle outside And the control means acquires an event occurrence point that is a target of the traffic information and a guide point that is a target of display of an enlarged guide map in the route guidance information. A step of determining the importance of the traffic information and the importance of the route guidance information for the vehicle, and the control means is a guide map in at least the traffic information according to the importance, or Presenting the driving support information according to any of the enlarged guide maps on the display means, and the step of determining the importance level is based on the current position of the host vehicle. When the guidance point is in front of the event occurrence point, the step of setting the importance of the route guidance information higher than the importance of the traffic information; and the control means based on the current position of the host vehicle Setting the importance of the traffic information higher than the importance of the route guidance information when the event occurrence point is in front of the guidance point; Driving support information presentation method comprising Mukoto is provided.

In the driving support information presentation method according to this embodiment, the step of presenting the previous SL driving support information, the control means, a screen of a predetermined display start time on the display means drive assist information by high the importance information The step of presenting the driving support information may include the step of presenting the driving support information in a state in which the control means displays the driving support information based on the information of high importance. When it is determined that the driving support information display start time has been reached, the step of continuing to display the driving support information with the high importance information and the control means display the driving support information with the low importance information. The driving support information based on the information of high importance when it is determined that the display start time of driving support information based on the information of high importance is reached. And displaying is switched to, may include a.

Further, in the driving support information presentation method according to this aspect, the direction of the event occurrence point is further determined when the control unit displays the enlarged guide map and the vehicle off-routes the guidance route. The process may include a step of deleting the enlarged guide map and displaying a guide map of the driving support information based on the traffic information, when the control means displays the guide map of the traffic information. In the displayed state, the vehicle may have a step of erasing the enlarged guide map when the vehicle travels in a direction different from the event occurrence point off-route the guidance route, The enlarged guide map in the route guidance information may be an enlarged guide map of the guidance intersection on the guidance route.

  According to the vehicle-mounted navigation device and the driving support information presentation method of the present invention, the location of the own vehicle, the event occurrence point that is the target of traffic information sent from outside the vehicle such as VICS, and the expanded guidance in the route guidance information A guide point to be displayed in the figure is acquired, and it is determined which of traffic information and route guide information is important for the vehicle. For example, when a guide point such as an intersection in route guidance is closer to the current position of the vehicle than the event occurrence point, the route guidance information is determined to be important, and an enlarged guide map of the intersection is displayed even if traffic information is acquired Like to do.

  As a result, the guidance of the intersection that is the target in the route guidance of the guidance route can be reliably displayed, and the user can definitely travel the route of the guidance point.

It is a block diagram which shows the structure of the vehicle-mounted navigation apparatus which concerns on one Embodiment of this invention. It is a figure explaining VICS by DSRC. It is a figure explaining the problem at the time of VICS traffic information reception. It is a flowchart which shows an example of a driving assistance information presentation process including the intersection enlarged view and importance determination of VICS traffic information. It is a figure explaining driving assistance information presentation in case an intersection enlarged view has priority. It is a figure explaining driving assistance information presentation when priority is given to VICS traffic information. It is a figure explaining driving assistance information presentation at the time of carrying out off route when the intersection enlarged view is displayed. It is a figure explaining driving assistance information presentation at the time of carrying out an off route when VICS traffic information is displayed.

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

(Configuration of in-vehicle navigation system)
FIG. 1 is a block diagram showing a configuration of an in-vehicle navigation device 100 according to an embodiment of the present invention.

  In the figure, 1 is a DVD drive, and 1a is a storage medium in which map data and other guidance data are stored. In the present embodiment, the DVD-ROM 1a is used as a storage medium for storing such data, but a hard disk or other storage medium may be used. The map stored here is divided into longitude and latitude widths of appropriate sizes according to each scale level such as 1/1500, 1/25000, 1 / 50,000, 1/10000, etc. Roads, buildings, facilities, and other various properties included in are stored as a coordinate set of points (nodes) expressed in longitude and latitude. Map data includes (1) a road layer composed of road link data, intersection data, node data, etc., (2) a background layer for displaying roads, buildings, parks, rivers, etc. on a map image, and (3) a municipality. Corresponding from the character / symbol layer for displaying administrative division names such as names, road names, intersection names, and map symbols, and (4) traffic information sent from the VICS Center It consists of a VICS conversion layer necessary for specifying a road.

  In the road layer, the road link data supplies attribute information of each road. For each link constituting the road, the type of road (national road, highway, prefectural road, other road), hierarchization of the road network It consists of data such as the level, the number of nodes constituting the link, the road number (road name), and the width of the link connecting each node. The intersection data is a set of nodes closest to the intersection among the nodes on the link coupled to the intersection. The node data is a list of all nodes constituting the road, and includes position information for each node, information for identifying whether the node is an intersection or not, and the like.

  An operation unit 2 is provided with operation buttons and the like for operating the navigation apparatus body 10. In this embodiment, the operation unit 2 includes a remote control transmitter, and the user can also operate the navigation apparatus body 10 with the remote control transmitter at hand.

  Also, 3 receives GPS signals sent from a plurality of GPS satellites and generates and outputs GPS data such as longitude, latitude, PDOP (Position DOP) value and HDOP (Horizontal DOP) value of the current position of the vehicle. A GPS receiver is shown. Reference numeral 4 denotes a self-contained navigation sensor. The self-contained navigation sensor 4 is composed of an angle sensor such as a gyro that detects a vehicle rotation angle, and a travel distance sensor that generates a pulse at every constant travel distance.

  In addition, 5 is a communication device such as an in-vehicle phone for communicating with various service centers, 6 is a radio wave beacon or an optical beacon, and VICS (Traffic Information Communication System) information transmitted by FM multiplex broadcasting. Fig. 4 shows a VICS receiver to receive. These beacons are installed on the roadside and connected to police stations, road managers and integration centers to provide information on traffic jams in the vicinity.

  Reference numeral 7 denotes a display unit such as a liquid crystal panel. The navigation device body 10 displays a map around the current position of the vehicle on the display unit 7, a guidance route from the departure point to the destination, a vehicle mark, Other guidance information is displayed. The display unit 7 is provided with a touch panel on the screen, and is configured with various buttons paired with the display content of the display screen. The touch panel serves as an input device for selecting a menu or the like indicated by these various buttons. Reference numeral 8 denotes a speaker for providing guidance information to the user by voice.

  The navigation device body 10 is composed of the following. Reference numeral 11 denotes a buffer memory that temporarily stores map data read from the DVD-ROM 1a via the DVD drive 1.

  Reference numeral 12 denotes a control unit constituted by a microcomputer. The control unit 12 has a built-in navigation program, and calculates the current position of the vehicle based on a signal output from the GPS receiver 3 or a signal output from the self-contained navigation sensor 4 according to the program. Or the map data to be displayed is read from the DVD-ROM 1a to the buffer memory 11 via the DVD drive 1 or from the destination to the destination under the search conditions set using the map data read to the buffer memory 11. Various processes are executed, such as searching for a guide route up to. Further, as will be described later, it is determined which of the traffic information acquired from the outside such as VICS and route guidance information is important for the host vehicle, and a guide map based on the important information is displayed.

  13 is a map drawing unit for generating a map image using the map data read out to the buffer memory 11, and 14 is for generating various menu screens (operation screens) and various marks such as vehicle position marks and cursors according to the operation status. This is the operation screen / mark generator.

  Reference numeral 15 denotes a guide route storage unit that stores the guide route searched by the control unit 12, and 16 denotes a guide route drawing unit that draws the guide route. The guidance route storage unit 15 stores all the nodes of the guidance route searched by the control unit 12 from the departure point to the destination. When displaying the map, the guide route drawing unit 16 reads the guide route information from the guide route storage unit 15 and draws the guide route with a color and line width different from those of other roads.

  Reference numeral 17 denotes a storage unit including a memory such as an EEPROM connected to the control unit 12 and temporarily stores received traffic information such as a VICS.

  An audio output unit 18 supplies an audio signal to the speaker 8 based on a signal from the control unit 12. Reference numeral 19 denotes an image composition unit, on which a map image drawn by the map drawing unit 13 is overlaid with various marks and operation screens generated by the operation screen / mark generation unit 14, a guidance route drawn by the guidance route drawing unit 16, and the like. And output to the display unit 7.

  In the in-vehicle navigation device 100 configured as described above, as a basic operation, the control unit 12 is based on the GPS signal received by the GPS receiver 3 and the signal input from the autonomous navigation sensor 4. Detect current position. Then, map data around the vehicle is read from the DVD-ROM 1 a via the DVD drive 1 and stored in the buffer memory 11. The map drawing unit 13 generates a map image based on the map data read to the buffer memory 11 and displays a map image around the host vehicle on the screen of the display unit 7 via the image composition unit 19.

  Moreover, the control part 12 detects the present position of the own vehicle based on each signal input from the GPS receiver 3 and the self-contained navigation sensor 4 with the movement of the own vehicle, and according to the detection result, the display part 7 The vehicle position mark is superimposed on the map image displayed on the screen, and the vehicle position mark is moved as the host vehicle moves, or the map image is scrolled.

  Further, when the user operates the operation unit 2 to set a destination and other necessary information (information about a waypoint on the way to the destination, etc.), the control unit 12 reads from the GPS receiver 3 and the autonomous navigation sensor 4. The current position of the vehicle detected based on each of the signals is used as a starting point, and a route with the lowest traffic cost from the starting point to the destination is searched using the map data of the DVD-ROM 1a. Then, the route obtained by the search is stored in the guidance route storage unit 15 as a guidance route, and the guidance route is superimposed on the map image on the screen on the display unit 7 via the guidance route drawing unit 16 and the image composition unit 19. Display together.

  In the state where the route guidance information by such a guidance route is displayed, when the traffic information from the outside is acquired, which information has priority in relation to the position of the vehicle differs.

  Hereinafter, the driving assistance information presentation process including the route guidance information and the importance determination of the VICS traffic information by DSRC (hereinafter also referred to as VICS traffic information) in the in-vehicle navigation device 100 will be described with reference to FIGS. I will explain.

  FIG. 2 is a diagram for explaining an outline of VICS by DSRC. Unlike VICS that uses FM multiplex broadcasting or optical beacons, VRC using DSRC distributes information from roadside devices to the navigation device through the DSRC in-vehicle device using narrowband communication of 5.8 GHz band.

  In FIG. 2, the vehicle 21 receives VICS traffic information from the roadside machine 22 installed at a predetermined position. The VICS traffic information includes, for example, information on the position where the broken vehicle is present and the position where the vehicle is congested, and image information on these positions. Further, when the reproduction location (information provision start position) where the VICS traffic information is provided is designated by latitude and longitude, and the host vehicle that has received the VICS traffic information reaches the information provision start position, the VICS traffic information is output. In general, the VICS traffic information is more important than the guidance information provided by the navigation device, and the VICS traffic information is output with priority over the guidance information.

  VICS traffic information not only provides information on traffic congestion and regulations on roads, but also provides information on nearby road conditions such as traffic jams at the end of curves with poor visibility and the presence of stopped vehicles, and alerts drivers. doing.

  FIG. 3 is a diagram illustrating a problem when VICS traffic information is acquired during route guidance. FIG. 3A shows the road 31 on which the guidance route 32 is displayed. The road 31 has an intersection A (33), and the guidance route 32 is guided so that the vehicle turns right at the intersection A (33). In addition, an event occurrence point 34 where a traffic jam has occurred is indicated by diagonal lines ahead of the intersection A (33) in the straight direction. Further, a VICS roadside unit 35 by DSRC is installed in front of the intersection A (33).

  When the VICS traffic information is received from the roadside device 35 at the own vehicle position 38a while the host vehicle is traveling on the road 31 in such a situation along the guidance route 32, the VICS traffic information including the information provision start position is stored in the storage unit 17. Temporarily store in. Thereafter, when the vehicle position 38b reaches a point 36 at a predetermined distance in front of the guidance target intersection (intersection A (33)), an enlarged view of the intersection as shown in FIG. 3B is displayed. FIG. 3B shows a display screen 40, in which a map image 42 around the vehicle position and a name display unit 41 that displays the name of the road on which the vehicle is running are displayed. In addition, an intersection enlarged view 43 is displayed so as to overlap the map image 42.

  Furthermore, when the vehicle position 38c reaches the information provision start position 37, the intersection enlarged view 43 is deleted or superimposed on the intersection enlarged view 43, and a VICS traffic information guide map 44 as shown in FIG. indicate. In FIG. 3C, the intersection enlarged view 43 is deleted and the VICS traffic information 44 is displayed on the map image 42 in the display screen 40 of FIG.

  Thus, before the own vehicle passes through the guidance target intersection, the enlarged intersection map is not displayed, and the user may miss information on the enlarged intersection map and proceed in the wrong direction.

  On the other hand, in this embodiment, it is determined which of the guidance by the navigation function and the traffic information by VICS is important for the host vehicle, and the important information is preferentially displayed.

  Hereinafter, the driving support information presentation process including the intersection enlarged view and the VICS traffic information importance determination will be described with reference to FIGS. 4 to 8.

  FIG. 4 is a flowchart illustrating an example of the driving support information presentation process performed by the control unit 12 of the in-vehicle navigation device 100. As a premise of this processing, it is assumed that a guidance route to the destination instructed via the operation unit 2 is searched and route guidance is performed while displaying route guidance information according to the vehicle position. .

  First, in step S11, the vehicle position is detected. The vehicle position is detected based on a signal from the GPS receiver 3 or a signal from the self-contained navigation sensor 4. It is assumed that the detection of the vehicle position is continuously performed at a predetermined interval in this process.

  In the next step S12, it is determined whether or not VICS traffic information has been acquired. The VICS traffic information is obtained by receiving radio waves transmitted from a VICS roadside device installed at a predetermined position. It waits until it acquires, and when it acquires, it transfers to step S13. When the VICS traffic information is received, information such as the location information of the event occurrence point and the information provision start position for providing the VICS traffic information is temporarily stored in the storage unit 17.

  In the next step S13, it is determined whether or not the host vehicle has reached the enlarged map display position of the guidance target intersection. It is determined on the basis of the current position of the vehicle and the map data whether or not the vehicle has approached a predetermined distance to the intersection (guide intersection) whose course is to be changed on the guidance route. It waits until it arrives, and when it arrives, it transfers to step S14 and displays an intersection enlarged view.

  In the next step S15, the position of the guidance target intersection and the position of the event occurrence point that is the target of the VICS traffic information are acquired. For example, the position of the guidance target intersection is acquired from the position information of the intersection on the guidance route. Further, the position of the event occurrence point is extracted from the VICS traffic information.

  In the next step S16, it is determined whether or not the host vehicle has reached the information provision start position of the VICS traffic information. It waits until it reaches, and when it reaches, it moves to step S17.

  In the next step S17 to step S19, the importance level of the VICS traffic information with respect to the current position of the host vehicle and the importance level of the route guidance information are determined, and the travel according to the guide map or the enlarged guide map in the VICS traffic information according to the importance level. Processing to display support information.

  In step S17, it is determined whether or not the guidance target intersection is in front of the event occurrence position. If it is in front, the process proceeds to step S18, and if the event occurrence position is in front of the guidance target intersection, the process proceeds to step S19. If the guidance target intersection is in front of the event occurrence position, the importance level of the route guidance information is set higher than the importance level of the VICS traffic information, and an enlarged guide map of the guidance target intersection is important for the host vehicle. This is recorded in the storage unit 17. On the other hand, when the event occurrence position is in front of the intersection to be guided, the importance of VICS traffic information is set higher than the importance of route guidance information, and VICS traffic information such as traffic jam information is important for the vehicle. That is recorded in the storage unit 17.

  In the next step S18, the VICS traffic information is not displayed, and the enlarged intersection display is continuously displayed for a predetermined time.

  On the other hand, in step S19, which is shifted to when the event occurrence position is determined to be before the guidance target intersection in step S17, the enlarged intersection map is deleted and the VICS traffic information is displayed for a predetermined time.

  In step S20, it is determined whether or not the own vehicle has off-routed the guidance route at the guidance target intersection and proceeded in the direction of the event occurrence position while the intersection enlarged view is displayed. If the vehicle is not off-routed, the enlarged view of the intersection in step S18 is continuously displayed for a predetermined time, and the process is terminated. When the vehicle is off-route, the process proceeds to step S21, the intersection enlarged view is deleted, the VICS traffic information is displayed for a predetermined time, and the process is terminated.

  On the other hand, in step S22, it is determined whether or not the vehicle has been off-routed in a direction different from the event occurrence position in the state where the driving support information based on the VICS traffic information is displayed in step S19. If it is not off-routed, the VICS traffic information in step S19 is continuously displayed for a predetermined time, and this process ends. When the vehicle is off-route, the process proceeds to step S23, where the VICS traffic information is deleted and normal route guidance is executed.

  The processing described above will be further described using the specific examples shown in FIGS.

  FIG. 5 shows an example of driving support information presentation when the enlarged intersection map is displayed with priority over the guide map based on VICS traffic information. FIG. 5A shows a road 51 on which a guidance route 52a is displayed. The road 51 has an intersection C (53), and the guidance route 52a is guided so that the vehicle turns right at the intersection C (53). In addition, an event occurrence point 54 where a traffic jam has occurred is indicated by diagonal lines ahead of the intersection C (53) in the straight direction. Further, a VICS roadside machine 55 by DSRC is installed in front of the intersection C (53).

  The host vehicle receives the VICS traffic information from the roadside device 55 at the host vehicle position 58a (step S12, hereinafter, the corresponding steps are described in the flowchart of FIG. 4), and the host vehicle position 58b is the guidance target intersection (intersection C (53 When a point 56 at a predetermined distance before)) is reached, an enlarged view of the intersection as shown in FIG. 5B is displayed (step S14). FIG. 5B shows a display screen 60, in which a map image 62 around the vehicle position and a name display unit 61 that displays the name of the road on which the vehicle is running are displayed. In addition, an intersection enlarged view 63 is displayed superimposed on the map image 62.

  Further, when the own vehicle position 58c reaches the information provision start position 57, the guidance target intersection 53 is in front of the event occurrence point 54, so that the display of the VICS traffic information is not performed, and FIG. 5 (b) continues. The intersection enlarged view 63 shown is displayed (step S18). Thereafter, the host vehicle advances along the guidance route, and this process ends.

  FIG. 6 shows an example of presentation of driving support information when a guide map based on VICS traffic information is displayed with priority over the enlarged intersection map. FIG. 6A shows the road 51 on which the guidance route 52b is displayed. The road 51 has an intersection B (59), and the guidance route 52b is guided so that the vehicle turns left at the intersection B (59). Moreover, the event occurrence point 54 where the traffic congestion has occurred from before this intersection B (59) is shown. Further, a VICS roadside machine 55 by DSRC is installed in front of the intersection C (53).

  When the host vehicle receives VICS traffic information from the roadside device 55 at the host vehicle position 58d (step S12), the host vehicle position 58e reaches a point 56b at a predetermined distance before the guidance target intersection (intersection B (59)). An intersection enlarged view 64 as shown in FIG. 6B is displayed (step S14). FIG. 6B shows a display screen 60 in which a name display unit 61 that displays a map image 62 around the vehicle position and the name of the road on which the vehicle is running is displayed. Further, an intersection enlarged view 64 is displayed so as to overlap the map image 62.

  Further, when the own vehicle position 58f reaches the information provision start position 57b, the event occurrence point 54 is in front of the guidance target intersection 59, so the enlarged intersection view 64 is deleted, and as shown in FIG. 6 (c). A guide map 65 based on VICS traffic information is displayed (step S19). In FIG. 6C, the intersection enlarged view 64 is deleted on the display screen 60 of FIG. 6B, and a guide map 65 based on VICS traffic information is displayed superimposed on the map image 62. FIG. Thereafter, the host vehicle advances along the guidance route, and this process ends.

  FIG. 7 shows an example of presentation of driving support information when the host vehicle goes off-route when the enlarged intersection view is displayed. FIG. 7A shows a road 51 on which a guidance route 52a before the off-route and a guidance route 52c after the off-route are displayed. The road 51 includes an intersection C (53) and an intersection B (59), and the guidance route 52a is guided so that the vehicle turns right at the intersection C (53). In addition, an event occurrence point 54 where a traffic jam has occurred is indicated by diagonal lines ahead of the intersection C (53) in the straight direction. Further, a VICS roadside machine 55 by DSRC is installed in front of the intersection C (53).

  When the host vehicle receives VICS traffic information from the roadside device 55 at the host vehicle position 58g (step S12), and the host vehicle position 58h reaches a point 56a at a predetermined distance before the guidance target intersection (intersection C (53)). An intersection enlarged view 63 as shown in FIG. 7B is displayed (step S14). FIG. 7B shows a display screen 60 on which an enlarged intersection view 63 is displayed, as in FIG. 5B.

  Further, when the own vehicle position 58i reaches the information provision start position 57a, the guidance target intersection 53 is in front of the event occurrence point 59, so the guidance map is not displayed by the VICS traffic information, and FIG. The intersection enlarged view 63 shown in b) is displayed (step S18).

  Thereafter, when the own vehicle goes off-route without making a right turn at the intersection 53 and proceeds in the direction of the event occurrence point 59, the displayed intersection enlarged view 63 is deleted, and the VICS traffic as shown in FIG. An information guide map 65 is displayed for a predetermined time (step S21).

  FIG. 8 shows an example of driving support information presentation when an off-route is performed while a guide map based on VICS traffic information is displayed.

  FIG. 8A shows the road 51 on which the guide route 52b before the off-route and the guide route 52d after the off-route are displayed. The road 51 has an intersection C (53) and an intersection B (59), and the guidance route 52b is guided so that the vehicle turns left at the intersection B (59). In addition, an event occurrence point 54 that is approaching the intersection B (59) and has a traffic jam before the intersection B (59) is indicated by hatching. Further, a VICS roadside machine 55 by DSRC is installed in front of the intersection C (53).

  When the host vehicle receives VICS traffic information from the roadside device 55 at the host vehicle position 58k (step S12), the host vehicle position 58m reaches a point 56b at a predetermined distance before the guidance target intersection (intersection B (59)). An enlarged intersection view 64 as shown in FIG. 8B is displayed (step S14).

  Further, when the own vehicle position 58n reaches the information provision start position 57b, the event occurrence point 54 is in front of the guidance target intersection 59, so the enlarged enlarged view of the intersection 64 is deleted, as shown in FIG. 8C. The VICS traffic information 65 is displayed (step S19).

  Thereafter, when the host vehicle is off-routed and turns right at intersection A (53), the displayed VICS traffic information 65 is deleted, and a normal route guide map as shown in FIG. 8D is displayed (step S23). ).

  As described above, according to the vehicle-mounted navigation device and the driving support information presentation method of the present embodiment, the position of the host vehicle, the event occurrence point that is the target of traffic information sent from outside the vehicle such as VICS, and the like Then, a guide point that is an object of display of the enlarged guide map in the route guide information is acquired, and it is determined which of the traffic information and the route guide information is important for the vehicle. For example, when a guide point such as an intersection in route guidance is closer to the current position of the vehicle than the event occurrence point, the route guidance information is determined to be important, and an enlarged guide map of the intersection is displayed even if traffic information is acquired Like to do.

  As a result, the guidance of the intersection that is the target in the route guidance of the guidance route can be reliably displayed, and the user can definitely travel the route of the guidance point.

  In addition, although this embodiment demonstrated the case where any one of an event occurrence point and a guidance object intersection was selected as driving assistance information, it is not restricted to this. For example, when the distance from the event occurrence point to the guidance target intersection is within a predetermined distance, the importance of the VICS traffic information for the host vehicle is equal to the importance of the route guidance information, and the guidance maps based on both information are paralleled. You may make it display the displayed driving assistance information.

  In the present embodiment, the guidance target intersection where the enlarged intersection guide map is displayed as the route guidance information has been described as an example. However, the present invention is not limited to this, and for example, a point where the host vehicle enters the narrow street is a guide point. When the approach point is closer to the vehicle position than the event occurrence point, an enlarged view of the narrow street may be displayed when entering.

  In the present embodiment, a guide map is displayed on the screen as the driving support information. However, voice guidance may be performed together with these guide maps.

1a ... DVD-ROM,
2 ... operation part,
3 ... GPS receiver,
4 ... Self-contained navigation sensor,
7 ... display part,
10 ... navigation device body,
11: Buffer memory,
12 ... control unit,
15 ... guide route storage unit,
16 ... guide route drawing unit,
17 ... storage part,
32, 52a, 52b, 52c, 52d ... guidance route,
33, 53, 59 ... Guidance target intersection,
34, 54 ... event occurrence point,
35, 55 ... VICS roadside machine,
36, 56a, 56b ... intersection enlarged guide map display position,
37, 57a, 57b ... information provision start position,
38, 58 ... own car position,
43, 63, 64 ... intersection enlarged guide map,
44, 65 ... Guide map with VICS traffic information,
100: A vehicle-mounted navigation device.

Claims (16)

Display means;
Own vehicle position detecting means for detecting the current position of the own vehicle;
Traffic information acquisition means for acquiring traffic information sent from outside the host vehicle;
A guidance route to the instructed destination is searched, route guidance information is displayed on the screen of the display unit according to the current position of the host vehicle detected by the host vehicle position detection unit, and the route guidance information is displayed along the guidance route. Control means for guiding to the destination;
Have
The control means includes
The event occurrence point that is the target of the traffic information and the guide point that is the display target of the enlarged guide map in the route guidance information are acquired, and the importance of the traffic information and the importance of the route guidance information for the host vehicle are determined. And, according to the importance, at least driving support information according to either the guide map or the enlarged guide map in the traffic information is displayed on the screen of the display means,
Based on the current position of the host vehicle acquired by the host vehicle position detection means, when the guide point is in front of the event occurrence point, the importance of the route guidance information is set higher than the importance of the traffic information. Set high, when the event occurrence point is in front of the guidance point, to set the importance of the traffic information higher than the importance of the route guidance information;
A vehicle-mounted navigation device.   The in-vehicle navigation device according to claim 1, wherein the control means displays the driving support information based on the information of high importance at a predetermined display start time.   Even when the driving support information based on the high importance information is displayed and the driving means displays the driving support information based on the low importance information, the control means uses the high importance information. The display of the driving support information is continued, and when the driving support information based on the low importance information is displayed, the display of the driving support information based on the high importance information is reached. 3. The in-vehicle navigation device according to claim 2, wherein the driving support information is displayed by switching to high information.   The control means sets the importance of the route guidance information equal to the importance of the traffic information when the guidance point and the event occurrence point are within a predetermined distance range. The in-vehicle navigation device described in 1.   The said control means displays the driving assistance information by both the said route guidance information and traffic information, when it determines with the importance of the said route guidance information and the importance of the said traffic information being equal. The in-vehicle navigation device described in 1.   In the state where the enlarged guide map is displayed, the control means deletes the enlarged guide map when the own vehicle travels off the guidance route and proceeds in the direction of the event occurrence point, The in-vehicle navigation device according to claim 3 or 5, wherein a guide map of the traffic information is displayed.   The control means displays the traffic information when the host vehicle travels in a direction different from the event occurrence point by off-routes the guidance route while displaying the traffic information guide map. The in-vehicle navigation device according to claim 3 or 5, wherein the figure is deleted.   The in-vehicle navigation device according to claim 1, wherein the enlarged guide map in the route guidance information is an enlarged guide map of a guidance intersection on the guidance route. In the driving support information presentation method performed in the vehicle-mounted navigation device having the display means, the vehicle position detection means, the traffic information acquisition means, and the control means,
The control means searching for a guidance route to the instructed destination;
In the own vehicle position detecting means, detecting the current position of the own vehicle;
A step wherein said control means, for guiding the route guidance information corresponding to the current position of the vehicle to the detected by the vehicle position detecting means to the destination by displaying on a screen of said display means,
In the traffic information acquisition means, acquiring traffic information sent from outside the host vehicle;
The control means acquiring an event occurrence point as a target of the traffic information and a guide point as a target of display of an enlarged guide map in the route guidance information;
The control means determining the importance of the traffic information for the host vehicle and the importance of the route guidance information;
The control means presenting, on the display means, driving support information according to at least one of the guide map or the enlarged guide map in the traffic information according to the importance;
Have
Determining the importance includes:
The control means sets the importance of the route guidance information higher than the importance of the traffic information when the guidance point is in front of the event occurrence point with reference to the current position of the host vehicle. Steps,
The control means sets the importance of the traffic information higher than the importance of the route guidance information when the event occurrence point is in front of the guidance point with the current position of the host vehicle as a reference. Steps,
A driving support information presentation method comprising:   The step of presenting the driving support information is a step in which the control means displays the driving support information based on the information of high importance on a screen of a display means at a predetermined display start time. Item 10. The driving support information presentation method according to Item 9. The step of presenting the driving support information includes:
When the control means determines that the driving support information based on the low importance information is displayed when the driving support information based on the high importance information is displayed, the control means uses the high importance information. Continuing to display the driving support information;
When the control means determines that the driving support information based on the high importance information is displayed in the state where the driving support information based on the low importance information is displayed, the high importance information is used. Switching to driving support information and displaying it;
The driving support information presentation method according to claim 10, further comprising: Determining the importance includes:
A step of setting the importance of the route guidance information equal to the importance of the traffic information when the control means is within a predetermined distance range between the guidance point targeted for the route guidance and the event occurrence point; ,
The driving support information presentation method according to claim 9, further comprising: The step of presenting the driving support information includes:
When the control means determines that the importance of the route guidance information is equal to the importance of the traffic information, the control means is a step of displaying driving support information based on both the route guidance information and the traffic information. The driving support information presentation method according to claim 12.   Furthermore, when the control means displays the enlarged guide map and the host vehicle travels off the guidance route and proceeds in the direction of the event occurrence point, the enlarged guide map is deleted. The driving support information presentation method according to claim 9, further comprising a step of displaying a guide map of driving support information based on the traffic information.   Further, when the control means displays the traffic information guide map and the host vehicle travels off the guide route and travels in a direction different from the event occurrence point, the enlarged guidance is provided. The driving support information presentation method according to claim 9, further comprising a step of deleting the figure.   The driving assistance information presentation method according to claim 9, wherein the enlarged guide map in the route guidance information is an enlarged guide map of a guidance intersection on the guidance route.

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