JP3539462B2 - Vehicle navigation system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle navigation device that provides travel guidance according to a preset route, and more particularly, to selectively display or select a landmark when displaying a landmark on a map or an intersection map. The present invention relates to a vehicular navigation device that makes it easy to confirm a vehicle position and an intersection on a route by highlighting a landmark.
[0002]
[Prior art and its problems]
In the route guidance by the vehicle navigation device, when the user is guided along the route displayed on the map and wants to know the surroundings of the current location in detail, it is possible to display the detailed map from the wide area map by switching, or to the guide intersection. When the distance is reached, the intersection diagram is enlarged and displayed on these screens. If you are traveling straight, you are traveling while checking some signs or landmarks of facilities, etc. In particular, the marks (landmarks) corresponding to the landmarks are not limited to those facing the route in the map, All marks prepared for display are displayed. When turning right or left at an intersection, intersection guidance is provided by screen display and / or voice when the vehicle reaches a predetermined distance in front of the intersection. When approaching a predetermined intersection (guide intersection) on the conventional guidance route, an enlarged view of the intersection shown in FIG. 15 is displayed. A current position mark 7 of the vehicle and an arrow 8 indicating the path of the vehicle are displayed from the approach path 9 toward the exit path 10 a predetermined distance before the intersection 5. In this enlarged view, a landmark 6 serving as a mark of the intersection, such as a hotel mark (H) or a gas station mark (GS), is displayed. For example, Japanese Unexamined Patent Publication No. 3-150700 proposes the display of a landmark serving as a mark on a guide intersection diagram on a route and the highlighting thereof.
[0003]
However, in the conventional landmark display during map display, all of the landmarks are displayed even if they are away from the guide route, face the route, or need not be in the route guidance. On the other hand, in the landmark display in the intersection diagram, the landmark to be displayed is determined regardless of the approach direction of the intersection, and in some cases, marks that cannot be confirmed in the approach direction are displayed. That was not enough. For example, in the case of FIG. 16A, the landmark of GS can be confirmed for the approach road, but the landmark of the hotel (H) cannot be confirmed. In the case of FIG. 16B, the GS landmark cannot be confirmed for the approach road, but the hotel (H) landmark can be confirmed. In the case of FIG. 16C, both the GS landmark and the hotel (H) landmark can be confirmed for the approach road. Further, in the case of FIG. 16-4, the GS landmark cannot be confirmed for the approach road, but the hotel (H) landmark can be confirmed.
In this way, the landmarks displayed on the intersection map are unnecessary for confirming the intersection on the approach path of the vehicle, or there are some landmarks that are not necessary but are not very useful, and There is the same problem as described above for the approach road and the exit road to the intersection.
[0004]
An object of the present invention is to selectively display landmarks that can be visually recognized by a driver on an approach route to an intersection and an exit route from an intersection, or to highlight the selected landmark, or It is an object of the present invention to provide a vehicular navigation device that displays a landmark in a selected display mode.
Another object is to selectively display landmarks for the approach route to the intersection and the exit route from the intersection of the route being displayed on the map, or to highlight the selected landmark or to highlight the selected landmark. It is an object of the present invention to provide a vehicle navigation device that displays a landmark in a display form.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention according to claim 1 is a vehicular navigation apparatus that provides route guidance to a destination according to a set route, and stores at least road data, intersection data, and landmark data. Information storage means, a current position detection means for detecting the current position of the vehicle, a route storage means for storing a set route, and a road stored in the information storage means based on the route stored in the route storage means. Intersection drawing means for acquiring data, intersection data, and landmark data to draw a guidance intersection map; and display means for displaying a guidance intersection map drawn by the intersection drawing means. Of the vehicle current position detected by the means and the route stored in the route storage means to the guidance intersection. Alternatively, a landmark facing the road from the guidance intersection may be used as a landmark to be displayed on the guidance intersection map. It is characterized by having landmark display determining means for selection.
[0006]
According to a second aspect of the present invention, there is provided a vehicle navigation apparatus for performing route guidance to a destination according to a set route, comprising: an information storage unit storing at least road data, intersection data, and landmark data; Current position detecting means for detecting the current position of the vehicle, route storing means for storing a set route, road data, intersection data and landmark data stored in the information storing means based on the route stored in the route storing means. And a display means for displaying the guidance intersection diagram drawn by the intersection drawing means, wherein the intersection drawing means is a vehicle current position detected by the current position detection means. Of the route stored in the route storage means to the guidance intersection Alternatively, landmarks facing the road from the guidance intersection are highlighted in the guidance intersection map. There is a landmark display determining means for selecting, and the display means highlights the landmark selected by the landmark display determining means.
[0007]
According to a third aspect of the present invention, there is provided a vehicle navigation apparatus for providing route guidance to a destination according to a set route, comprising: an information storage unit storing at least road data, intersection data, and landmark data; Current position detecting means for detecting the current position of the vehicle, route storing means for storing a set route, road data, intersection data and landmark data stored in the information storing means based on the route stored in the route storing means. And a display means for displaying the guidance intersection diagram drawn by the intersection drawing means. Each of the landmark data has at least two display forms. The intersection drawing means stores the current vehicle position detected by the current position detection means and the route storage means. Of the path, the path of entry into the guide intersection Or, depending on whether or not it faces the road from the guidance intersection, the display form of the landmark displayed on the guidance intersection map There is a landmark display judging means to select, and the display means displays the landmark in the display form selected by the landmark display judging means.
[0008]
According to another aspect of the present invention, there is provided the following configuration.
(1) The display means is based on the route stored in the route storage means and the current position of the vehicle detected by the current position detection means, and is provided with guidance at the intersection drawn by the intersection drawing means a predetermined distance before the intersection to be guided. It is configured to display an intersection diagram.
(2) The landmark display determining means is configured to select a landmark facing the approach road to the guidance intersection.
(3) The landmark display determining means is configured to select a landmark facing the approach road and the exit road to the guidance intersection.
(4) Landmark display judging means is the approach route and the exit route to the guidance intersection On the route facing and ahead of the vehicle It is configured to select a landmark.
[0009]
An invention according to claim 8 is a vehicular navigation apparatus for providing route guidance to a destination according to a set route, wherein said information storage means stores at least map data including road data and intersection data and landmark data. Current position detecting means for detecting the current position of the vehicle, route storing means for storing a set route, map data and landmark data stored in the route and information storing means stored in the route storing means Map drawing means for drawing the route to be guided based on the map in a superimposed manner, and display means for displaying the map drawn by the map drawing means, wherein the map drawing means comprises: The approach route of the route stored in the position and route storage means to the guidance intersection Or, use the landmark facing the road from the guidance intersection as the landmark to be displayed on the map during route guidance. It is characterized by having landmark display determining means for selection.
[0010]
An invention according to claim 9 is a vehicular navigation apparatus for providing route guidance to a destination according to a set route, wherein the information storage means stores at least map data including road data and intersection data and landmark data. Current position detecting means for detecting the current position of the vehicle, route storing means for storing a set route, map data and landmark data stored in the route and information storing means stored in the route storing means Map drawing means for superimposing and drawing a route to be guided on a map based on the map, and display means for displaying a map drawn by the map drawing means, wherein the information storage means stores landmark data, and the map drawing means The approach route to the guidance intersection of the vehicle current position detected by the current position detection means and the route stored in the route storage means Or, as a landmark that highlights the landmark facing the exit road from the guidance intersection on the map during route guidance There is a landmark display determining means for selecting, and the display means highlights the landmark selected by the landmark display determining means.
[0011]
According to a tenth aspect of the present invention, there is provided a vehicle navigation apparatus for providing route guidance to a destination according to a set route, wherein information storage means stores at least map data including road data and intersection data and landmark data. Current position detecting means for detecting the current position of the vehicle, route storing means for storing a set route, map data and landmark data stored in the route and information storing means stored in the route storing means Map drawing means for drawing a route to be guided based on the map in a superimposed manner, and display means for displaying a map drawn by the map drawing means. Each of the landmark data has at least two display forms. The map drawing means stores the current position of the vehicle detected by the current position detection means and the route stored in the route storage means. Access road to the guidance intersection Or, depending on whether or not it faces an exit road from the guidance intersection, the display form of the landmark displayed on the map during route guidance is changed. There is a landmark display judging means for selection, and the display means displays the landmark in the display form selected by the landmark display judging means.
[0012]
Further, another invention relating to the eighth, ninth, and tenth aspects has the following configuration.
(1) The landmark display determination means is configured to select only the landmark facing the route.
(2) The landmark display judging means is configured to select only the landmark ahead of the traveling direction according to the current position of the vehicle from the landmarks facing the route.
[0013]
According to the above configuration, the information storage unit stores the landmark data, and the intersection drawing unit sets the landmark display determination unit when the vehicle current position detected by the current position detection unit reaches a predetermined distance before the intersection. Based on the route stored in the storage means, a landmark to be displayed on the guidance intersection map is selected, and the intersection drawing means performs drawing processing of the landmark selected on the intersection map, and outputs the landmark to the display means for display. The landmark display is selectively displayed from the landmarks stored in the storage means, or the selected landmark is highlighted. This makes it easier for the driver to see the landmarks on the map or at the intersection diagram. In particular, in the intersection diagram, only the landmarks that can be visually confirmed by the driver with respect to the approach road and / or the exit road are selectively displayed or highlighted so that the position at the intersection can be easily confirmed. It can be carried out.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a system configuration of the navigation device.
In FIG. 1, a navigation device includes an input / output device 1 for inputting and outputting information relating to route guidance, a current position detection device 2 for detecting information relating to the current position of the vehicle, navigation data required for calculating a route, and route guidance. An information storage device 3 in which various guidance data and the like are recorded, and a central processing unit 4 which executes route search processing and display / voice guidance processing necessary for route guidance and controls the entire system.
[0015]
The input / output device 1 allows a user to input information necessary for setting a destination such as a departure place, a destination, and a passing point, and to output voice guidance and / or display on-screen guidance information when the driver needs it. In addition to the function of instructing the central processing unit 4 to perform the navigation processing according to the intention of the user, there is provided a function of printing out the processed data and the data of the data communication. As means for realizing the function, the input unit is constituted by a touch switch 11 for inputting an address, a telephone number, coordinates, and the like for setting a destination, and requesting route guidance. The output unit displays input data on the screen, or displays the driver's request or the route guidance automatically on the display 12, the data processed by the central processing unit 4, the data stored in the information storage device 3, and the communication data. It comprises a printer 13 for printing out and a speaker 14 for outputting route guidance by voice.
[0016]
The display 12 is constituted by a color CRT or a color liquid crystal display, and all screens necessary for navigation, such as a destination setting screen, a section map screen, and an intersection map screen, based on map data and guidance data processed by the central processing unit 4. Are displayed in color and keys for setting route guidance, performing guidance during route guidance, and performing a screen switching operation are displayed on this screen. The display 12 is provided with a touch switch 11 corresponding to the display of a function key, and is configured to execute the above-described operation based on a signal input by key touch. The current position detecting device 2 is a GPS receiving device 21 using a satellite navigation system (GPS), a beacon receiving device 22, for example, a data transmitting / receiving device 23 receiving a GPS correction signal using a car phone or an FM multiplex signal, for example, a geomagnetic sensor An absolute azimuth sensor 24 composed of, for example, a wheel sensor and a steering sensor, and a distance sensor 26 for detecting the traveling distance from the number of rotations of the wheels. Detect coordinates and the like.
[0017]
The information storage device 3 includes, for example, a map data file storing map information, an intersection data file storing information on intersections, and road data storing information on roads, such as road types and starting points and ending points of each road, necessary for route guidance. File, a node data file that stores the east longitude and north latitude coordinates at one point on the road, location information of landmarks such as gas stations and convenience stores classified by genre, and guidance information about the landmarks. It consists of stored guide point data files and the like.
[0018]
The central processing unit 4 executes a program installed to realize the functions of the present system and executes a calculation process. The CPU 40 is a program for performing a process such as a route search, and is necessary for displaying a landmark at a guidance intersection and providing route guidance. A first ROM 41 storing a program for performing necessary display control and voice output control necessary for voice guidance and data necessary for the program, and stores road information (road sequence data, guidance intersection data) after route search or re-search. A memory 42 composed of a RAM, a non-volatile memory, or the like as a route storage unit and a storage unit for temporarily storing route guidance information and data during arithmetic processing, and a second storage unit storing display data necessary for route guidance and map display. 2 ROM 43, image memory 44 storing image data used for screen display on a display, display from CPU The image processor 45 fetches image data from an image memory based on a control signal, performs image processing and outputs the image data to a display, and voice data (phrase, one phrase) read from the information storage device 3 based on a voice output control command from the CPU. (Synthesized sentences, sounds, etc.), converts them into analog signals and outputs the signals to a speaker, a communication interface 47 for exchanging input / output data by communication, and a sensor signal of the current position detection device 2. Input interface 48, and a clock 49 for writing the date and time in the internal diagnostic information. Here, the route guidance is configured so that the driver can select either the screen display or the voice output.
[0019]
The present invention Embodiment in The prerequisite is constituted by a function realizing means for performing route guidance to a destination according to a preset route. The function implementing means includes a destination setting means, a route searching means, and an output means. That is, the destination setting means includes a CPU 40 for executing a program relating to a destination setting process stored in the first ROM 41, a touch switch 11 and a display 12 of the input / output device 1 for inputting a destination and outputting a map display, etc. And an input / output processing unit including an interface 47 for inputting a destination input signal from the touch switch 11 to the central processing unit 4. The route search means has a function of searching for a route to be guided based on the set departure place (current position of the vehicle) and the destination, and is constituted by the CPU 40 executing a program related to a route search process stored in the first ROM 41. You. The output means has a function of outputting guidance based on the searched route, and executes a program related to display / voice processing stored in the first ROM 41, a CPU 40, an image processor 45, a voice processor 46, a display 12, a speaker 14, and the like. It is constituted by.
[0020]
The present invention Embodiment in The function of drawing a landmark on an intersection diagram as a characteristic part of is realized by the following configuration. The storage means stores road data, intersection data, and all data necessary for performing navigation, and is constituted by the information storage device 3. The route storage means stores a preset route and is constituted by a memory 42 in the central processing unit. The current position detecting means has a function of detecting the current position of the own vehicle, and is configured by the current position detecting device 2. The intersection drawing means has a function of drawing a guidance intersection map based on the stored route, road data and intersection data, and executes a program related to an intersection drawing process stored in the first ROM 41, an image processor 45, and an image memory 44. It is constituted by. The display means has a function of displaying the guidance intersection diagram which has been subjected to the drawing processing, and is constituted by the display 12. The landmark display determining means has a function of selecting a landmark to be displayed on the guidance intersection map based on the detected current vehicle position and the acquired route data, and executes a program related to the landmark display determining process stored in the first ROM 41. It is configured by a CPU 42 that performs processing.
[0021]
The function of drawing a landmark on a map including an intersection diagram is realized by the following configuration. The storage means stores road data, map data including intersection data, and all data necessary for navigation, and is constituted by the information storage device 3. The route storage means stores a preset route and is constituted by a memory 42 in the central processing unit. The current position detecting means has a function of detecting the current position of the own vehicle, and is configured by the current position detecting device 2. The map drawing means has a function of drawing a map based on the stored route, road data, and map data, and includes a CPU 40, an image processor 45, and an image memory 44 for executing a program related to map drawing processing stored in the first ROM 41. Is done. The display means has a function of displaying the map subjected to the drawing processing, and is constituted by the display 12. The landmark display determining means has a function of selecting a landmark to be displayed on a map based on the detected current vehicle position and the acquired route data, and executes a program related to a landmark display determining process stored in the first ROM 41. It is constituted by.
[0022]
This system calculates an estimated position based on various sensor signals of the current position detection and GPS data, determines a position on the road by correlating the estimated position with a road on the map and GPS data, and determines the current position. Ask. The present system also has a function of illuminating the current position with a route to a destination and determining whether or not a position on the lane of the own vehicle is approaching a predetermined guide point. That is, the above function determines a predetermined distance before the intersection on the guide route, an automatic voice output after the intersection is determined, and a timing of displaying the intersection information such as the name of the passing intersection. A guidance command is issued to the image processor and the audio processor based on the result of this determination. Further, when the request signal is input, it instructs the voice processor to provide voice guidance of the current position. In the voice guidance of the present system, voice data (phrases, a single sentence, sound, etc.) read from the information storage device 3 is synthesized, converted into an analog signal, and output from a voice output unit.
[0023]
Next, a data structure related to the display of a landmark will be described. A number is assigned to a road connected at a branch point, a junction, or an intersection (hereinafter, referred to as an intersection or the like), and a guide route is defined by node sequence data based on the road number. FIG. 2 shows a node row road network in which roads heading for intersections and the like are numbered and represented. For example, if the starting point and the ending point of the road are intersections, the intersection (II) is set as the starting point and the intersection I is set as the ending point for the road (1). The intersection II which is the starting point of the road (1) is the starting point of the road (11), and the intersection I which is the ending point of the road (1) is the starting point of the road (3). Similarly, it can be defined as shown between each intersection and the road connecting it. FIG. 3 shows the data of the node train road network of FIG. In this example, road data has landmark data. Each road is a road number, the next road number having the same start point, the next road number having the same end point, the start point, the end point, the node column pointer, and the road length. And landmark numbers.
[0024]
Next, selection of a landmark for each road will be described. In the first embodiment of landmark display, a landmark is selected from previously prepared landmarks, and the landmark is displayed on an intersection diagram or a map including the intersection diagram. First, landmark display at an intersection will be described. When making a right or left turn at an intersection, only landmarks representing landmarks around the intersection required for the right / left turn are selected and the landmarks are displayed. In FIG. 4, for example, when the road number (1) is the approach road, a landmark located on the currently traveling road (1) and the road (6) for which guidance is unnecessary for the intersection is selected. Alternatively, landmarks located at road numbers (1) (2) (4) (5) (6) (7) are selected.
[0025]
Next, a case where landmark data is stored in the intersection data will be described. As shown in FIG. 5, the intersection data includes the number of intersections, the intersection number assigned to each intersection, intersection coordinates (East longitude / North latitude coordinate), road information connected to the intersection, and storage information of landmarks. (Landmark data address, size). The landmark data has the number of landmarks displayed near the intersection. Each landmark has landmark coordinates (east longitude, north latitude), mark pattern No. , Facing road No. Defined by Here, when the vehicle is located at the corner of the intersection, two road data are stored. The mark pattern data is associated with landmarks to be drawn by numbers. In the illustrated example, the number “0” is XX bank mark drawing data, the number “1” is Δ bank mark drawing data,... have.
[0026]
When a landmark is displayed on a map including an intersection diagram, the landmark data is displayed corresponding to the road data shown in FIG. In other words, when the intersection data has landmark data, the landmark data is defined by the coordinates of the display position of the landmark on the map and the road on which the landmark faces as shown in FIG. You.
As described above, the landmark is stored in association with each intersection data or map data including the intersection.
[0027]
In the above example, landmark coordinates are given in the east longitude and north latitude. However, as shown in FIG. 6, by giving an offset value based on the intersection coordinates (a vector value with the intersection coordinates as the origin), the approach to the intersection is made. It is possible to easily perform the drawing control of the landmark on the intersection enlarged view in which the direction is upward.
A data structure of another embodiment relating to the display of a landmark will be described. In the second embodiment, when highlighting selected landmarks on an intersection diagram or a map including the intersection diagram, the third embodiment displays at least two landmarks and displays the selected landmarks at the intersection. This is a case of displaying on a map including a map or an intersection diagram.
[0028]
As shown in FIG. 7, the data structure of the landmarks displayed on the map is characterized by the display positions, attributes, and facing road numbers of all the landmarks to be displayed on the map used for route guidance. In the landmark data, the “facing road No.” is unnecessary when the landmark data is stored in the road data as shown in FIG. 3 because it is assigned to each road.
Each landmark has a landmark coordinate (East longitude, North latitude), landmark attribute, facing road No. Defined by The landmark attribute is the mark pattern No. in the second embodiment. And the mark display palette. In the third embodiment, the mark pattern No. (Large), mark pattern No. (Small). Furthermore, the second and third embodiments can be combined.
[0029]
The mark pattern data (large) is a unique mark of the mark, for example, a service mark of XX Bank, a service mark of $ GS (gas station) or the like, so that the mark can be identified at a glance to a brand name. Mark pattern (small) Landmark In order to make it possible to identify the brand at a glance, the mark is a mark generally used in the notation of the relevant mark or a mark prepared in advance by the present system, for example, a bank mark, a GS mark, or the like. As described above, two types of display patterns are stored in the landmark data, and if the landmark is a landmark to be highlighted, the larger one of the pattern is stored. Select and display the smaller one.
The mark display palette is defined by a highlighting palette and a non-highlighting palette corresponding to each brand name. As described above, the mark display palette has separate palettes (combinations of R, G, and B) for highlighting and non-highlighting. For example, the highlighting increases the luminance or the color tone. Or make it brighter.
[0030]
Next, the landmark display drawing process will be described. FIG. 8 shows the flow of the intersection diagram drawing process. The route data is acquired (S1), it is determined whether the vehicle has arrived a predetermined distance before the guidance intersection, for example, 300 m before the intersection (S2). If the vehicle has not arrived, the route data is acquired again. When the vehicle reaches a predetermined distance from the guidance intersection, the corresponding intersection data is acquired (S3), the connection road data is acquired (S4), the landmark data is acquired (S5), and a land for selecting which landmark is to be displayed is selected. A mark display determination process is performed (S6). The selected landmark is drawn and displayed on the intersection diagram (S7). In step S4, as the connection road data to be obtained, only roads connected to the corresponding intersection obtained in step S3 may be obtained, or all road data in a predetermined display area may be obtained and displayed. Is also good. In the processing of steps S5 to S7, landmarks are stored, for example, as image data in advance, the pattern data in FIGS. 5 and 7 are determined, the image data is obtained, and the landmark is drawn at the corresponding coordinate position. Let
[0031]
The landmark display determination processing in step S6 will be described. FIG. 9 shows a landmark display determination process when a landmark faces an approach road, an exit road, or a road in a straight traveling direction. In this example, it is determined whether or not to display each of the landmarks acquired for the intersection to be guided. Here, MODE = 1 is displayed, and MODE = 0 is not displayed.
First, route data is acquired (S10), and i = 1 is set (S11) in order to determine the display of all the acquired landmarks. It is determined whether the landmark faces the approach road (S12). If the landmark does not face the approach road, it is determined whether the landmark faces the approach road (S13). When it does not face the approach road and the exit road, it is determined whether or not it faces the road in the straight traveling direction (S14). In steps S12 to S14, if the vehicle faces any one of the roads, a process of displaying a landmark on the road is performed (MODE = 1 is set) (S15). If it does not face any of the approach road, the exit road, and the straight road, the landmark display process is not performed (MODE = 0 is set) (S16). All the target landmarks are determined (S17), and the process ends.
[0032]
In the above example, when the landmark is displayed, the approach road, the exit road, and the straight road are selected based on the reference, but those that are further on the left or right side of the traveling direction, for example, those on the left side in the case of Japan May be selected or emphasized. This is because there are wide roads in the city, and it may be difficult to see what is on the right side due to the median strip and traffic congestion, but even in such a case the landmark is displayed on the left side, driving The person can be surely recognized.
In another embodiment, as a landmark display process, the hatched portion 11 shown in FIG. 10 is set as a display range, and only those having an offset value from the coordinates (East longitude, north latitude) of the intersection 5 within the display range are displayed. May be controlled. In the illustrated example, only the landmark at the corner of the guidance intersection that can be confirmed while traveling on the approach road 9 and the landmark facing the exit road 10 are displayed.
[0033]
11 and 12 show specific examples of the landmark display for the intersection diagram. These two figures show the case where the approach direction is different at the same intersection. In FIG. 11, when the road proceeds from the road with the road number {1} to the road with the road number {3}, and in FIG. The case where the vehicle proceeds to the road of the road number {circle around (2)} is shown. In this example, landmarks facing the approach road and the exit road are highlighted. When the display of this landmark is controlled using the data structure of FIG. 7, the gas station (2) is displayed in a pattern (small) in FIG. 11 and in a pattern (large) in FIG. On the other hand, the convenience store mark (3) is displayed in a pattern (large) in FIG. 11 and in a pattern (small) in FIG.
[0034]
In addition, as a method of highlighting, a method of changing luminance or contrast without changing the shape of a mark, a method of forming a frame around a mark to be emphasized, or the like can be used. If the vehicle is traveling as instructed by the route guidance, information on only the selected landmark may be obtained. For example, when the vehicle deviates from the route intentionally or by mistake, the road can be recognized. For example, in the intersection diagram of FIG. 11, if the vehicle turns toward the road (2), it means that the highlighted gas station mark (1) is on the right hand and the vehicle is turning left. Take (1) on your left and turn right to take the road facing the convenience store mark (3)
[0035]
However, the driver is able to recognize that the road is different from the guide road because the driver is taking the course with the road facing the gas station mark (1) on the right.
The display of landmarks on the map display during route guidance will be described. When the selected landmark is displayed during the map display, the example of FIG. 13 displays only the landmark facing the route. In the example of FIG. 14, only the mark on the route and ahead of the traveling direction of the vehicle is displayed. Alternatively, only a specific mark may be highlighted. With this configuration, it is possible to selectively display information effective for route guidance in a limited display space such as an in-vehicle display device.
In addition, the display of landmarks may be thinned out in consideration of the display density (character information or the like) of the map currently being displayed.
The present invention is configured to combine the selective display and the emphasis display of landmarks, or to configure either one of them, and to allow the user to select one that displays all of these and predetermined landmarks. It can also be configured.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a system configuration of a vehicle navigation device according to the present invention.
FIG. 2 is an explanatory diagram of a node row road network.
FIG. 3 is an explanatory diagram of node string data.
FIG. 4 is an explanatory diagram of landmark selection display for an approach road to an intersection and an exit road from an intersection.
FIG. 5 is an explanatory diagram of intersection data defining land mater data.
FIG. 6 is an explanatory diagram of another embodiment of a data structure of a landmark.
FIG. 7 is an explanatory diagram of another embodiment of a data structure of a landmark.
FIG. 8 is a flowchart of an intersection diagram drawing process.
FIG. 9 is a flowchart of a landmark display determination process.
FIG. 10 is an explanatory diagram of another embodiment of a landmark display.
FIG. 11 is an explanatory diagram of another embodiment for highlighting a landmark.
FIG. 12 is an explanatory diagram of highlighting a landmark when an approach road is different from that of FIG. 11;
FIG. 13 is an explanatory diagram of a case where only land maters facing a route are displayed.
FIG. 14 is an explanatory diagram of a case where only a land mater located on the route and ahead of the vehicle in the traveling direction is displayed.
FIG. 15 is an explanatory diagram of a landmark display in a conventional intersection diagram.
FIG. 16 is an explanatory diagram of a conventional landmark display example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Input-output device, 2 ... Current position detection device, 3 ... Information storage device, 4 ... Central processing unit, 5 ... Intersection, 6 ... Landmark, 7 ... Vehicle current position mark, 8 ... Route arrow, 9 ... Entry Road, 10 ... Advance road, 11 ... Landmark display range

Claims (12)

A vehicle navigation device that provides route guidance to a destination according to a set route,
Information storage means storing at least road data, intersection data and landmark data,
Current position detecting means for detecting the current position of the vehicle,
Route storage means for storing the set route;
Intersection drawing means for obtaining road data, intersection data, and landmark data stored in the information storage means based on the route stored in the route storage means and drawing a guidance intersection diagram;
Display means for displaying a guidance intersection diagram drawn by the intersection drawing means,
The intersection drawing means, the vehicle current position detected by the current position detection means and the route stored in the route storage means , the landmark facing the approach road to the guidance intersection or the exit road from the guidance intersection, A vehicle navigation device comprising a landmark display determining means for selecting a landmark to be displayed on the guidance intersection map . A vehicle navigation device that provides route guidance to a destination according to a set route,
Information storage means storing at least road data, intersection data and landmark data,
Current position detecting means for detecting the current position of the vehicle,
Route storage means for storing the set route;
Intersection drawing means for obtaining road data, intersection data, and landmark data stored in the information storage means based on the route stored in the route storage means and drawing a guidance intersection diagram;
Display means for displaying a guidance intersection diagram drawn by the intersection drawing means,
The intersection drawing means, the vehicle current position detected by the current position detection means and the route stored in the route storage means , the landmark facing the approach road to the guidance intersection or the exit road from the guidance intersection, Vehicle navigation characterized by having landmark display determining means for selecting as a landmark to be highlighted in the guidance intersection diagram , wherein the display means highlights the landmark selected by the landmark display determining means. apparatus. A vehicle navigation device that provides route guidance to a destination according to a set route,
Information storage means storing at least road data, intersection data and landmark data,
Current position detecting means for detecting the current position of the vehicle,
Route storage means for storing the set route;
Intersection drawing means for obtaining road data, intersection data, and landmark data stored in the information storage means based on the route stored in the route storage means and drawing a guidance intersection diagram;
Display means for displaying a guidance intersection diagram drawn by the intersection drawing means,
Each of the landmark data is stored with at least two display forms, and the intersection drawing means includes a vehicle current position detected by the current position detection means and a route stored in the route storage means. A landmark display determining unit that selects a display mode of a landmark to be displayed on the guide intersection diagram depending on whether the vehicle faces an approach road to a guide intersection or an exit road from the guide intersection, and the display unit includes: A vehicular navigation apparatus characterized in that the landmark is displayed in a landmark of a display form selected by the landmark display determining means. The display means is provided at the intersection drawn by the intersection drawing means at a predetermined distance before the intersection to be guided based on the route stored in the route storage means and the current position of the vehicle detected by the current position detection means. 4. The vehicle navigation device according to claim 1, wherein a guidance intersection diagram is displayed. 4. The vehicle navigation device according to claim 1, wherein the landmark display determining means selects a landmark facing an approach road to the guidance intersection. The vehicle navigation device according to any one of claims 1, 2, and 3, wherein the landmark display determining means selects a landmark facing the approach road and the exit road to the guidance intersection. 4. The landmark display determining means selects a landmark on a route facing an approach road and an exit road to a guidance intersection and in front of the vehicle in the traveling direction. The vehicle navigation device according to any one of the preceding claims. A vehicle navigation device that provides route guidance to a destination according to a set route,
Information storage means storing map data and landmark data including at least road data and intersection data;
Current position detecting means for detecting the current position of the vehicle,
Route storage means for storing the set route;
Map drawing means for drawing a route supervised on a map based on the route stored in the route storage means and the map data and landmark data stored in the information storage means,
Display means for displaying a map drawn by the map drawing means,
The map drawing means, the vehicle current position detected by the current position detection means and the route stored in the route storage means , the landmark facing the approach road to the guidance intersection or the exit road from the guidance intersection, A vehicle navigation device comprising landmark display determining means for selecting a landmark to be displayed on the map during route guidance . A vehicle navigation device that provides route guidance to a destination according to a set route,
Information storage means storing map data and landmark data including at least road data and intersection data;
Current position detecting means for detecting the current position of the vehicle,
Route storage means for storing the set route;
Map drawing means for drawing a route supervised on a map based on the route stored in the route storage means and the map data and landmark data stored in the information storage means,
Display means for displaying a map drawn by the map drawing means,
The information storage unit stores landmark data, and the map drawing unit sets an approach route or a guide to a guide intersection between the vehicle current position detected by the current position detection unit and the route stored in the route storage unit. Landmark display determining means for selecting a landmark facing an exit road from an intersection as a landmark to be highlighted on the map during route guidance , wherein the display means is selected by the landmark display determining means. A navigation device for a vehicle, wherein a landmark is highlighted. A vehicle navigation device that provides route guidance to a destination according to a set route,
Information storage means storing map data and landmark data including at least road data and intersection data;
Current position detecting means for detecting the current position of the vehicle,
Route storage means for storing the set route;
Map drawing means for drawing a route supervised on a map based on the route stored in the route storage means and the map data and landmark data stored in the information storage means,
Display means for displaying a map drawn by the map drawing means,
Each of the landmark data is stored with at least two display forms, and the map drawing means includes a vehicle current position detected by the current position detection means and a route stored in the route storage means. by determining Luke not the menses to advance path from the entry passage or guidance intersection to the guidance intersection, a landmark display determination means for selecting a display mode of the landmark to be displayed on the map in the route guidance, the display The means for displaying is provided with a landmark in a display form selected by the landmark display determining means. 11. The vehicle navigation device according to claim 8, wherein the landmark display determining means selects only a landmark facing the route. The vehicle according to any one of claims 8, 9 and 10, wherein the landmark display determining means selects only a landmark ahead of the traveling direction according to the current position of the vehicle, from the landmarks facing the route. Navigation device.

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