JP3850898B2 - Data display device and data display method - Google Patents

Description

[0001]
[Industrial application fields]
  The present invention relates to a data display device and a data display method used in an in-vehicle navigation system (device).
[0002]
[Prior art]
  Conventionally, there is a so-called self-contained navigation device as a positioning device mounted on various moving bodies such as automobiles, airplanes, and ships.
[0003]
  This self-contained navigation apparatus obtains a two-dimensional displacement (vector amount) of a moving body from the azimuth data from the azimuth sensor and the velocity data from the speed sensor, integrates the two-dimensional displacement to a reference point, The current position is obtained.
[0004]
  For example, in the case of an automobile, the current position (data) is obtained by integrating the accumulated traveling distance and the accumulated azimuth obtained from the traveling distance sensor and the azimuth sensor with the reference point.
[0005]
  More specifically, for example, the number of rotations of the drive shaft and the number of pulses generated by the rotation number sensor attached to the drive shaft are associated in advance, and the total number of pulses generated from the reference point to the current position is determined. The calculated travel distance is obtained by multiplying the calculated distance by the distance correction count, and the integrated azimuth is obtained by integrating the azimuth obtained by the geomagnetic sensor.
[0006]
  Further, a GPS (Global Positioning System) navigation device has been developed as a positioning device using an artificial satellite. This GPS navigation device normally receives radio waves from three or more GPS satellites, and includes pseudorange data including the time offset of the receiver between each GPS satellite and the reception point (self-position) and the position of each GPS satellite. The current position (data) of the reception point is obtained from the data.
[0007]
  As an aspect in which these positioning devices are used as an actual navigation system, from a simple one indicating the latitude and longitude of the current position in numbers to a self-location and destination on a map screen displayed on a CRT (CathodeRay Tube) screen. There are even advanced ones that display various data such as distance and moving speed.
[0008]
  A navigation system for displaying various data on a CRT screen reads map data including the obtained current position from a storage medium such as a CD-ROM, and creates screen data from the read map data and the obtained current position data. The image is output to the CRT and displayed.
[0009]
  The display image in the form of a map allows the user to grasp his / her current position in association with the map.
[0010]
[Problems to be solved by the invention]
  By the way, when traveling on a highway, etc., it is necessary to change the route unless there is a highway-related facility (interchange, service area, parking area, junction (branch point), etc., hereinafter referred to as a highway facility). Absent.
[0011]
  In the above conventional navigation system, there is a problem that, although the facility information corresponding to each high-speed facility is useful for the user, it is not always possible to display meaningful information due to restrictions such as the area of the display screen. .
[0012]
[Means for Solving the Problems]
  In order to solve the above-mentioned problem, the invention according to claim 1 is capable of entering route setting means for setting a route that the moving body should move to the destination and information on the facility.ProgressStorage means stored for each road on which the facility is installed along with the direction; recognition means for recognizing the traveling direction of the moving body while the moving body is moving on the set route; and the recognized moving body A facility search unit that searches the storage unit for a facility that is ahead of the moving body in the traveling direction based on the traveling direction of the moving object and that exists on the route that the moving body can enter, and the facility searching unit searches for the facility The name of the facilityIn an arrangement according to the actual location of the facility on the routeAnd a facility name display means for displaying.
[0013]
  The invention according to claim 2 is the data display device according to claim 1,The facility name display means can be switched between a first mode for displaying the name of the found facility and a second mode for displaying the route by displaying the position of the moving body on a map. The facility search means searches the storage means for a facility that exists on the route when displaying the name of the facility in the first mode.
[0014]
  In order to solve the above problems, the claims3The described invention includes a route setting step for setting a route on which the moving body should move to a destination, a recognition step for recognizing the traveling direction of the moving body while the moving body is moving on the set route, a facility, Information on the possible entryProgressFrom the storage means stored for each road on which the facility is installed along with the direction, based on the recognized traveling direction of the moving body, the moving body is ahead in the traveling direction, and the moving body can enter The facility search process for searching for facilities existing on the route, and the name of the facility searched by the facility search processIn an arrangement according to the actual location of the facility on the routeAnd a facility name display step for displaying.
[0015]
【Example】
  Next, preferred embodiments of the present invention will be described with reference to the drawings.
  FIG. 1 is a block diagram showing a basic configuration when the present invention is applied to an in-vehicle navigation system.
[0016]
  The in-vehicle navigation system 100 detects a geomagnetic sensor 1 that outputs direction data of the traveling direction of the own vehicle, an angular velocity sensor 2 that detects angular velocity at the time of rotation of the own vehicle and outputs angular velocity data, and detects the number of rotations of the shaft. A mileage sensor 3 that outputs mileage data by integration, a GPS receiver 4 that receives radio waves from GPS satellites and outputs GPS positioning data, and azimuth data, angular velocity data, mileage data, and GPS positioning data. Based on this, the system controller 5 that controls the entire navigation system, the input device 11 for inputting various data, and the CD-ROM that reads and outputs various data from the CD-ROM disk DK under the control of the system controller 5. Various display data under the control of the drive 12 and the system controller 5 And Shimesuru display unit 13 is configured to include a sound reproducing unit 18 for transmitting various information and a voice under the control of the system controller 5.
[0017]
  The system controller 5 includes an interface unit 6 that performs an interface operation with the outside, a CPU 7 that controls the entire system controller 5, a ROM (ReadOnlyMemory) 8 that stores a control program that controls the system controller, and a non-volatile memory (not shown) A random access memory (RAM) 9 that stores various data in a writable manner, and is connected to the input device 11, the CD-ROM drive 12, and the display unit 13 via the bus line 10. Has been.
[0018]
  The display unit 13 is composed of a graphic controller 14 that controls the entire display unit based on control data sent from the CPU 7 via the bus line 10 and a memory such as a VRAM (VideoRAM), and temporarily displays image information that can be displayed immediately. A buffer memory 15 for storing information and a display control unit 16 for controlling display of a display 17 such as a liquid crystal display device or a CRT based on image data output from the graphic controller 14.
[0019]
  The sound reproduction unit 18 includes a D / A converter 19 that performs digital / analog conversion of audio digital data sent from the CD-ROM drive 12 or RAM 9 via the bus line 10, and an acoustic analog output from the D / A converter 19. An amplifier 20 that amplifies the signal and a speaker 21 that converts the amplified acoustic analog signal into an acoustic vibration and outputs it are configured.
[0020]
  In the following explanation, a map mode that displays the position of the moving vehicle on the map screen, and high-speed facilities such as interchanges, service areas, parking areas, junctions (branch points) on preset highways or toll roads The description will be made assuming that there are two display modes: a highway mode in which information (distance to the high-speed facility, name of the high-speed facility existing in the traveling direction, etc.) is displayed by text information and graphic information.
[0021]
  Next, highway information data used in the highway mode will be described with reference to FIGS. As shown in FIG. 2, the highway information data 30 includes distance data 31 representing a distance from a node end (the node end will be described in detail below) to a facility, and a route (Tomei Expressway) where the facility exists. , Tohoku Expressway, etc.), route number data 32 representing a route number uniquely assigned to each route, facility number data 33 representing the name of the facility, and progress from the node end to the facility Traveling direction flag data 34 representing a direction. The facility number data 33 is a unique value in each route.
[0022]
  Here, the node ends will be described with reference to FIG. For a preset highway or toll road, the whole country is divided into meshes as shown in FIG.
[0023]
  Then, as shown in the partial enlarged view of the area AR in FIG. 3B, the intersection between the boundary line of the mesh (for example, indicated by the symbol MS) and the expressway or toll road is indicated by the node end (reference characters NT10 to NT16). .) In this case, the dimension of the mesh is, for example, 1 km square.
[0024]
  Between the node ends (NT12 to NT13), as shown in FIG. 3C, nodes (N10 to N13) indicating one end of each straight line are used to approximate the road shape between the node ends with a plurality of straight lines. Is assigned.
[0025]
  Next, facility search data used in the highway mode will be described with reference to FIGS. As shown in FIG. 4, the facility search data 35 roughly corresponds to the route number data 32 of the highway information data 30 and includes index data 36 representing each storage address of facility data 38 to be described later, and the index data 36. And a facility data group 37 composed of a plurality of facility data 38 to be searched.
[0026]
  Here, prior to the description of the facility data group 37, an example of a high-speed facility will be described with reference to FIG. On the α expressway, as a high-speed facility, there are an A interchange (IC) that is the starting point of the α expressway, a B service area (SA) that exists in the downward direction from the A interchange, and further in the downward direction. And a C junction (JCT) that branches into the road.
[0027]
  The distance between each high-speed facility when going in the down direction is as shown below.
  A interchange-B service area: a1
  B service area to C junction: b1
  In addition, the distance between each high speed facility when going in the upward direction is as shown below.
[0028]
  B service area-A interchange: b2
  C junction to B service area: c2
  Next, facility data will be described with reference to FIG. 6 by taking the B service area as an example.
[0029]
  The service data 38 in the B service area is roughly configured to include downlink data 39 and uplink data 40.
  In this case, since the uplink data 40 has the same configuration as the downlink data 39, the downlink data 39 will be described in detail.
[0030]
  Downlink data 39 includes identification flag data 41 indicating that the data is downlink data 39, presence / absence data 42 for determining a facility that exists only on one of the downlink and the uplink, and the facility End point flag data 43 indicating the start or end point of the expressway or toll car road where the facility is provided, and how many routes other than the main line branch when the facility is a junction or the like The branch data 44 indicating the number of branches and the branch direction (right direction or left direction toward the traveling direction) and the distance from the facility to the next facility (specifically, the distance from the B service area to the C junction) b1) section distance data 45 and the installation facility data indicating the installation facility (gas station, restaurant, souvenir shop, etc.) of the facility. A motor 46 (specifically, latitude data and longitude data B service area) position data representing the location of the facility 47, and is configured with a.
[0031]
  Next, the operation will be described with reference to FIGS. In the following description, the transition from the normal map mode to the highway mode will be described based on the user's manual setting.
[0032]
  First, various variables are initialized (step S1).
  Next, a high-speed exit search is performed (step S2).
  The high-speed exit search is to search for an exit to be displayed in order to display the exit from the highway to the general road so that the user can be identified.
[0033]
  More specifically, when performing a high-speed exit search, it is determined whether or not a route has been set in advance.
  Thus, when the route is not set, the processing is performed on the assumption that the high-speed exit is not set, that is, the exit has not yet been determined at the present time.
[0034]
  If the route has already been set, the latitude data and longitude data of the interchange set as the exit are acquired.
  Then, the process proceeds to the main process routine (see FIG. 8) (step S3).
[0035]
  In the main processing routine, the background is drawn on the CRT (step S21), and the key guide 50 is drawn as shown in FIG. 12 (step S22). Here, the key guide 50 is a message area for command input drawn in a key switch shape on the CRT.
[0036]
  Next, the system controller 5 acquires the highway information data 30 from the CD-ROM (DK) via the CD-ROM drive 12 (step S23).
  The system controller 5 determines whether or not a high speed facility ahead in the traveling direction is detected based on the acquired highway information data 30 (step S24).
[0037]
  If it is determined in step S24 that a high-speed facility is detected ahead in the traveling direction, it is determined whether or not the facility data group 37 needs to be loaded (step S25).
[0038]
  If it is not necessary to load the facility data group 37 in the determination in step S25, the process proceeds to step S27.
  When it is necessary to load the facility data group 37 in the determination in step S25, the facility data group 37 is loaded (step S26).
[0039]
  Here, the loading of the facility data group 37 will be described with reference to FIG.
  Based on the route number data of the highway information data 30 obtained in step S23, the index data 36 of the facility search data 35 is referred to, and the corresponding facility data group 37 is referred to.
[0040]
  Next, among the plurality of facility data 38 constituting the facility data group 37 referred to next, the facility data 38 corresponding to all the facilities that are ahead in the traveling direction from the current position of the vehicle and reach the end point of the route. Find all the numbers and the unique number of the facility.
[0041]
  More specifically, as shown in FIG. 13, when there are 50 facilities with unique numbers = 1 to 50 on a certain route, the facilities ahead of the own vehicle position P in the traveling direction (unique numbers = 20 to 50). The number of facilities = 31 and the unique number = 20 to 50 are obtained.
[0042]
  In this case, the unique number of the facility ahead of the direction of travel is continuous, but if any facility exists only on the route in the direction opposite to the direction of travel, the unique number is not necessarily consecutive. Is not limited.
  Subsequently, it is determined whether or not the cursor position needs to be initialized (step S27).
[0043]
  If it is not necessary to initialize the cursor position in step S27, the process proceeds to step S29.
  If it is necessary to initialize the cursor position in the determination in step S27, re-display is performed based on the stored cursor position.
[0044]
  Here, initialization of the cursor position will be described in detail.
  For example, in the case shown in FIG. 12, in the facility name display, the number of facilities that can be displayed at a time is 4 facilities due to the limitation of the display area of the CRT screen.
[0045]
  Therefore, the reference initialization position of the cursor position is the closest facility ahead in the direction of travel, that is, in the case of FIG.
[0046]
  More specifically, in FIG. 12, the display indicating that the nearest facility ahead in the traveling direction is the Kohoku parking area is displayed.Going.
  In addition, if you enter a different route from the middle, or if you pass the facility corresponding to the cursor position in the previous initialization and the nearest facility in the forward direction is changed, etc. automatically The cursor position is initialized.
[0047]
  However, even if it passes through the facility corresponding to the cursor position in the previous initialization and the closest facility ahead in the direction of travel is changed, the cursor is determined in the key check process (step S12) described later. If the cursor position is changed using the up and down keys that move the position up and down on the screen, initialization is performed if it is on the same route and has not yet passed the facility corresponding to the cursor position of the change destination. Not done.
[0048]
  Subsequently, the facility data 38 is referred to (step S29), and the distance to the facility (total distance) is calculated (step S30).
  Here, the calculation of the total distance will be described with reference to FIG.
[0049]
  First, the closest node N1 ahead of the traveling direction from the current position P of the host vehicle is determined, and position coordinate data (latitude data and longitude data) of the node N1 is obtained.
  Then, the distance L1 is calculated based on the current position coordinate data (latitude data and longitude data) that is the position coordinate data of the current position P.
[0050]
  Similarly, the distances L2 to L4 are calculated based on the position coordinates of the node N1, the node N2, and the node N3.
  Subsequently, the distance L5 is obtained by referring to the distance data 31 of the highway information data 30 corresponding to the node end NT.
[0051]
  Based on the calculated distances L1 to L4 and the obtained distance L5, the total distance is obtained by the following equation.
        Total distance = L1 + L2 + L3 + L4 + L5
  Next, a route name is drawn in a route name drawing area 51 (see FIG. 12) at the top of the CRT screen (step S31).
[0052]
  Subsequently, a plurality of facility names corresponding to the current cursor position are drawn in the facility name drawing area 52 (see FIG. 12) (step S32).
  More specifically, as shown in FIG. 10, first, it is determined whether or not there is a facility serving as an exit in the facilities to be displayed in the facility name drawing area 52 (whether there is exit guidance) (step S45). .
[0053]
  If it is determined in step S45 that there is no exit guidance, the process proceeds to step S47.
  If there is exit guidance in the determination in step S45, the facility name is drawn by changing the character color of the drawing portion of the facility name corresponding to the exit (step S46).
[0054]
  Next, it is determined whether or not there is a facility having a branch path (junction) among the facilities to be displayed in the facility name drawing area (step S47).
  If it is determined in step S47 that there is no facility having a branch path among the facilities to be displayed in the facility name drawing area, the process proceeds to step S33.
[0055]
  If it is determined in step S47 that there is a facility having a branch path among the facilities to be displayed in the facility name drawing area 52, the branch path symbol 54 is drawn in the individual facility name drawing area 53 of the corresponding facility (step S47). S48).
[0056]
  Subsequently, the detailed facility information about the facility corresponding to the cursor position is drawn in the detailed facility information drawing area 55 (see FIG. 12) (signboard drawing; step S33).
  More specifically, in the case of the display example of FIG. 12, as the detailed facility information, the facility name (Kohoku parking area), the total distance to the facility (about 4 km), and the installed facility (gas station and restaurant symbol display) are displayed. To do.
[0057]
  In this case, the installation facility displays the display based on the installation facility data 46 of the facility data 38.Going.
  Further, in the determination in step S24, if the facility cannot be detected forward in the traveling direction, it is determined whether or not the vehicle is traveling near any facility (step S34).
[0058]
  If it is determined in step S34 that the vehicle is traveling near any facility, it is determined whether the facility data group 37 needs to be loaded (step S35).
[0059]
  If it is not necessary to load the facility data group 37 in step S35, the process proceeds to step S37.
  If it is necessary to load the facility data group 37 in step S35, the facility data group 37 is loaded in the same manner as described above (step S36).
[0060]
  Next, the route data and the facility data are referred to, and a message “˜running near” is displayed on the CRT screen. More specifically, as shown in FIG. 15B, when the own vehicle (current position P) enters the general road through the A interchange, as shown in FIG. The message “Running near the road A interchange” is displayed.
[0061]
  If it is determined in step S34 that no facility is traveling, it is determined whether or not there is an expressway in the vicinity of the current position (in circle C in FIG. 16B) (step S39; FIG. 9). reference).
[0062]
  If it is determined in step S39 that there is an expressway in the vicinity of the current position, the process proceeds to step S43.
  In step S39, if there is no highway in the vicinity of the current position, a message “There is no highway nearby” is displayed as shown in FIG. It is determined whether or not there is an expressway in the vicinity of the current position (after a predetermined time has elapsed) (step S41).
[0063]
  If it is determined in step S41 that there is an expressway in the vicinity of the current position before the predetermined time has elapsed, the process proceeds to step S4.
  If it is determined in step S41 that there is no highway in the vicinity of the current position even after a lapse of a certain time (after the lapse of a certain time), a request to end the highway mode is made and the process proceeds to step S4.
[0064]
  If there is an expressway in the vicinity of the current position in the determination in step S39, it is determined whether or not a search is being performed (step S43).
  If it is determined in step S43 that the search is currently being performed, the process proceeds to step S4.
[0065]
  If it is determined in step S43 that the current search is not being performed, it is determined that an error has occurred, error processing is performed, and the process ends.
  Next, the system controller 5 determines whether or not the own vehicle is approaching an exit facility (interchange or the like) based on the current position of the own vehicle (step S4).
[0066]
  If it is determined in step S4 that the exit facility is not approached, the process proceeds to step S12.
  Here, the key check process (step S12) will be described with reference to FIG.
[0067]
  First, the system controller 5 determines whether or not the end key of the input device 11 has been pressed (step S60).
  If it is determined in step S60 that the end key is pressed, a request to end the highway mode is made (step S61), and the process proceeds to step S6.
[0068]
  If it is determined in step S60 that the end key has not been pressed, it is determined whether or not a confirmation key (CR key) has been pressed (step S62).
  If it is determined in step S62 that the confirmation key has been pressed, it is determined whether or not an end request has been made by the user (step S63).
[0069]
  Here, the end request by the user is a request for shifting to the map mode and displaying the map near the current position of the own vehicle during the display in the highway mode, and the cursor position in the horizontal direction on the screen. This is done by moving the cursor to the “end” portion of the key guide 50 on the display screen shown in FIG. 12 with the left and right keys to be moved, and pressing the enter key (CR key) in the reverse display state.
[0070]
  If it is determined in step S63 that an end request has been made by the user, a highway mode end request is made (step S61), and the process proceeds to step S6.
[0071]
  If no termination request is made by the user in step S63, it is determined whether or not the facility data of any facility is being searched (step S64).
[0072]
  If it is determined in step S64 that any facility is being passed or facility data for any facility is being searched, the process proceeds to step S6.
  If it is determined in step S64 that no facility is being passed or no facility data is being searched for, it is determined whether or not a map call request has been made by the user (step S65).
[0073]
  Here, the map reading request by the user is a request for shifting to the map mode during display in the highway mode and displaying a map of the vicinity of the facility corresponding to the current cursor position. The cursor is moved to the “call map” portion of the key guide 50 on the display screen shown in FIG. 12 by the left and right keys to be moved in the left and right directions, and the confirmation key (CR key) is pressed in the highlighted state. Do.
[0074]
  If it is determined in step S65 that a map call request is made by the user, a map read request (flag) is set (step S66), a highway mode end request is issued (step S67), and the process is performed in step S6. Migrate to
[0075]
  If it is determined in step S65 that a map call request has not been made, a cursor initialization request is made (step S68), and the process proceeds to step S6.
[0076]
  If it is determined in step S62 that the confirmation key has not been pressed, it is determined whether or not the left key of the input device 11 has been operated (step S69).
  If it is determined in step S69 that the left key is pressed, it is determined whether or not the cursor can be moved to the left side in the key guide 50 (step S70).
[0077]
  If it is determined in step S70 that the cursor can be moved to the left in the key guide 50, the cursor is moved to the left (step S71).
  If it is determined in step S70 that the cursor cannot be moved to the left, the process proceeds to step S6.
[0078]
  If it is determined in step S69 that the left key has not been pressed, it is determined whether or not the right key of the input device 11 has been operated (step S72).
  If the right key is pressed in step S72, it is determined whether or not the cursor can be moved to the right side in the key guide 50 (step S73).
[0079]
  If it is determined at step S73 that the cursor can be moved to the right side in the key guide 50, the cursor is moved to the right (step S74).
  If it is determined in step S73 that the cursor cannot be moved to the left, the process proceeds to step S6.
[0080]
  If it is determined in step S72 that the right key has not been pressed, it is determined whether or not the upper key of the input device 11 has been operated (step S75).
  In step S75, if the up key is pressed, it is determined whether or not the cursor is on the last facility (end facility) among the facilities that can be displayed (step S76).
[0081]
  If it is determined in step S76 that the cursor is not on the end point facility, the cursor is moved to the next facility in the traveling direction (step S77), and the process proceeds to step S6.
[0082]
  If it is determined in step S76 that the cursor is on the end point facility, the process proceeds to step S6.
  If it is determined in step S75 that the up key has not been pressed, it is determined whether or not the down key has been pressed (step S78).
[0083]
  If it is determined in step S78 that the down key has not been pressed, the process proceeds to step S6.
  If the down key is pressed in step S78, it is determined whether or not the cursor is on the first facility (currently the front facility) among the facilities that can be displayed (step S79).
[0084]
  If it is determined in step S79 that the cursor is not currently on the front facility, the cursor is moved to the front facility in the traveling direction (step S80), and the process proceeds to step S6.
[0085]
  If it is determined in step S79 that the cursor is currently on the front facility, the process proceeds to step S6.
  If the exit facility is approached in the determination in step S4, a request to end the highway mode is made (step S5).
[0086]
  Next, the system controller 5 determines whether or not a map reading request has been made (step S6).
  If it is determined in step S6 that no map reading request has been made, the process proceeds to step S8.
[0087]
  If it is determined in step S6 that a map read request has been made, an end request is made using the current position of the vehicle or the position coordinates of the designated high-speed facility as display latitude data and display longitude data.Do(Step S7).
[0088]
  Next, the system controller 5 determines whether or not a cursor initialization (reset) request has been made (step S8).
  If it is determined in step S8 that no cursor initialization request has been made, the process proceeds to step S10.
[0089]
  If a cursor initialization request has been made in step S8, the cursor is initialized and the display screen is updated (step S9).
  Subsequently, the system controller 5 determines whether or not a request to end the highway mode has been made (step S10).
[0090]
  If it is determined in step S10 that an end request has not been made, the process proceeds to step S3 again, and the same process is repeated.
  If it is determined in step S10 that an end request has been made, an end process is performed (step S11), and a transition is made to a map mode in which the current position of the vehicle or the position coordinates of the designated high-speed facility is the display center position. .
[0091]
  Next, specific display examples based on the above processing will be described with reference to FIGS.
[0092]
(1) Display example when the vehicle is on a highway
  As shown in FIG. 17 (b), when the host vehicle is traveling in front of the A interchange on the α expressway, the cursor position is the name of the individual facility of the A interchange as shown in FIG. 17 (a). The position corresponds to the drawing area 53 (indicated by hatching in the drawing), and the detailed facility information drawing area 55 displays the name of the A interchange and the distance D1 to the A interchange.
[0093]
(2) Display example when the cursor is sent to the facility in front of the direction of travel
  When the vehicle position is at the position shown in FIG. 17B, when the cursor is moved to the E junction using the upper key of the input device 11, the cursor position is E as shown in FIG. The position corresponds to the individual facility name drawing area 53 of the junction (indicated by hatching in the figure), and the name of the E junction and the distance D2 to the E junction are displayed in the detailed facility information drawing area 55.
[0094]
(3) Display example when facilities exist only in the opposite lane
  As shown in FIG. 19B, when the B parking area exists only in the opposite lane, as shown in FIG. 19A, the facility name drawing area 52 has an A interchange, a C interchange, and a D service area. Is displayed, and the cursor position is a position corresponding to the individual facility name drawing area 53 of the A interchange (indicated by hatching in the figure). D3 is displayed.
[0095]
(4) Display example when entering from one expressway to another expressway via junction
  In this case, a case where the vehicle enters the β motorway via the junction A on the α motorway shown in FIG.
[0096]
  As shown in FIG. 20B, the front facility of the own vehicle is an A junction, and when there is no A junction in the vicinity of the own vehicle (in the circle C in the figure), as shown in FIG. In the facility name drawing area 52, the A junction, B interchange and C service area existing on the α motorway are displayed, and the cursor position is a position corresponding to the individual facility name drawing area 53 of the A junction (in FIG. In the detailed facility information drawing area 55, the name of the A junction and the distance d to the A junction are displayed.
[0097]
  When the host vehicle further advances, as shown in FIG. 21B, when the front facility of the host vehicle is an A junction and the A junction is in the vicinity of the host vehicle (in the circle C in the figure), FIG. As shown in (a), a message “α motorway, traveling near junction A” is displayed.
[0098]
  Furthermore, when the host vehicle advances and enters the β motorway as shown in FIG. 22B, and the front facility of the host vehicle becomes an E interchange, the facility name drawing area 52 is located on the β motorway. The E interchange, F parking area, and G interchange existing in the area are displayed, and the cursor position is a position corresponding to the individual facility name drawing area 53 of the E interchange (indicated by hatching in the figure), and the detailed facility information drawing area 55 is displayed. Displays the name of the E interchange and the distance d ′ to the E interchange.
[0099]
  As described above, it is possible to provide accurate facility information even when entering another motorway via a junction.
[0100]
(5) When the facility in front is an exit facility
  As shown in FIG. 23 (b), when it is set that the front facility is an A interchange, and the A interchange is a facility (exit facility) that should go down to a general road, and the vehicle position P is an alarm area When outside the AL, as shown in FIG. 23 (a), only the A interchange is displayed in the facility name drawing area 52, and the name of the A interchange and up to the A interchange are displayed in the detailed facility information drawing area 55. The distance is displayed.
[0101]
  Further, when the vehicle further advances, as shown in FIG. 24B, the front facility is the A interchange, the vehicle position P exists in the alarm area AL, and the speed is less than the predetermined speed. As shown in FIG. 24 (a), a message “α driving near the A interchange” is displayed, and when the A interchange is approached, the map mode is automatically entered and the map display screen near the A interchange is displayed. It becomes. Further, in parallel with the change of the display mode, the sound reproduction unit 18 outputs an announcement “Soon to exit” along with an electronic sound for calling attention.
[0102]
  If the front facility is an A interchange, the vehicle position P is in the alarm area AL, and the speed is equal to or higher than the predetermined speed, the map mode is automatically entered immediately and a map display near the A interchange is displayed. It becomes a screen. Further, in parallel with the change of the display mode, the sound reproduction unit 18 outputs an announcement “Soon to exit” along with an electronic sound for calling attention.
[0103]
  In the above embodiment, only the case where the own vehicle moves has been described. However, in the case where a travel plan is made in advance, the user designates one facility and the traveling direction (direction to follow the route), It is also possible to configure to display information about a facility existing in the traveling direction starting from the facility.
[0104]
  More specifically, if the Kohoku interchange is set as the starting point facility and the down direction (Atsugi interchange direction) is designated, the facility information can be obtained in the same manner as in the above embodiment without actually traveling.
[0105]
  In this case, it is more desirable to display the approximate required time in consideration of not only the distance to the selected facility but also the speed limit and the like.
[0106]
  Moreover, in the above embodiment, the case of displaying information on a high-speed facility while traveling on a highway has been described. It is also possible to store the facility information such as historic sites and display the tourist information along the route.
[0107]
  Also in this case, in the same manner as described above, when the user designates one facility and the traveling direction (direction to follow the route), information on the facility existing in the traveling direction starting from the facility is displayed. It is also possible to configure.
[0108]
  More specifically, if one landmark is set as the starting point facility and the traveling direction in the sightseeing route is designated, the facility information can be obtained in the same manner as in the above embodiment without actually traveling.
[0109]
【The invention's effect】
  As explained above,Invention of the present applicationAccording toBecause you can display the facility information of the facility located in front of the direction of travel on the route,Necessary facility information can be easily obtained with an appropriate amount of information for the user.
[Brief description of the drawings]
FIG. 1 is a schematic configuration block diagram of a navigation system.
FIG. 2 is an explanatory diagram of highway information data.
FIG. 3 is an explanatory diagram of a node end.
FIG. 4 is an explanatory diagram (1) of facility search data.
FIG. 5 is an explanatory diagram (2) of facility search data.
FIG. 6 is an explanatory diagram of a facility data group.
FIG. 7 is an operation process flowchart (1).
FIG. 8 is an operational process flowchart (2).
FIG. 9 is an operation process flowchart (3).
FIG. 10 is an operation process flowchart (4).
FIG. 11 is an operation processing flowchart (5).
FIG. 12 is an explanatory diagram of a display screen.
FIG. 13 is an explanatory diagram of facility data acquisition.
FIG. 14 is an explanatory diagram of calculation of a total distance.
FIG. 15 is an explanatory diagram (1) of a specific display example.
FIG. 16 is a diagram (2) illustrating a specific display example.
FIG. 17 is a diagram (3) illustrating a specific display example.
FIG. 18 is a diagram (4) illustrating a specific display example.
FIG. 19 is a diagram illustrating a specific display example (5).
FIG. 20 is a diagram (6) illustrating a specific display example.
FIG. 21 is a diagram (7) illustrating a specific display example.
FIG. 22 is an explanatory diagram (8) illustrating a specific display example.
FIG. 23 is an explanatory diagram (9) of a specific display example.
FIG. 24 is an explanatory diagram (10) of a specific display example.
[Explanation of symbols]
100: In-vehicle navigation system
1 ... Geomagnetic sensor
2 ... Angular velocity sensor
3 ... mileage sensor
4 ... GPS receiver
5 ... Stem controller
6 ... Interface section
7 ... CPU
8 ... ROM
9 ... RAM
10 ... Bus line
11 ... Input device
12 ... CD-ROM drive
13 ... Display unit
14 ... Graphic controller
15 ... Buffer memory
16: Display control unit
17 ... Display
18 ... Sound reproduction unit
19 ... D / A converter
20 ... Amplifier
21 ... Speaker
30 ... Highway information data 30
31 ... Distance data
32 ... Route number data
33 ... Facility name data
34 ... Traveling direction flag data
35 ... Facility search data
36 ... Index data
37 ... Facility data group
38 ... Facility data
39: Downlink data
40: Uplink data
41 ... identification flag data
42 ... Existence data
43 ... End point flag data
44 ... Branch data
45 ... Section distance data
46 ... Installation facility data
47 ... Position data
50 ... Key guide
51 ... Route name drawing area
52 ... Facility name drawing area
53 ... Individual facility name drawing area
54 ... Branch path symbol
55 ... Detailed facility information drawing area
N_Ten~ N₁₃…node
NT_Ten~ NT₁₆... node end

Claims (3)

Route setting means for setting a route for the moving body to travel to the destination;
Storage means for storing information on facilities for each road on which the facility is installed, together with a traveling direction in which the facility can enter;
Recognizing means for recognizing the traveling direction of the moving body while the moving body is moving along the set route;
Facility search means for searching from the storage means a facility that is forward in the travel direction of the mobile body based on the recognized travel direction of the mobile body and that exists on the route into which the mobile body can enter;
Facility name display means for displaying the name of the facility searched by the facility search means in an arrangement according to the actual location of the facility on the route;
A data display device comprising: The data display device includes a first mode for displaying the name of the facility searched by the facility name display means, and a second mode for displaying the route by displaying the position of the moving body on a map, Is configured to be switchable,
  The facility search means searches the storage means for a facility existing on the route when displaying the name of the facility in the first mode.
The data display device according to claim 1. A route setting step for setting a route that the moving body should move to the destination;
  A recognition step of recognizing the traveling direction of the moving body while the moving body is moving along the set route;
  Information on the facility is stored in front of the traveling direction of the moving body based on the recognized traveling direction of the moving body from the storage means storing the traveling direction in which the facility can be entered for each road where the facility is installed, and A facility search step of searching for facilities existing on the route that the mobile body can enter;
  A facility name display step of displaying the name of the facility searched by the facility search step in an arrangement according to the actual location of the facility on the route;
A data display method characterized by comprising:

Images