JPH09152354A - Navigation apparatus for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation apparatus by which only a landmark capable of being confirmed with a driver's eyes is displayed selectively with reference to an approach road to a crossing or with reference to the approach road and an advance road. SOLUTION: The arrival of a vehicle at a part before a prescribed distance from a guidance crossing is judged, a landmark to be displayed is selected on the basis of the crossing, a connecting road and a landmark, and a plotting processing operation is performed to a crossing map. The landmark is displayed and selected in such a way that, when, e.g. landmarks are faced with an approach road, an advance road and a road in a straight-advance direction, whether the landmarks face any road out of the approach road, the advance road and the road in the straight-advance direction is judged (S12 to S14). When they face any of the roads, the display processing operation of the landmark to the road is performed (mode =1) (S15). When the landmarks do not face any road, the display processing operation of the landmarks is not performed (mode =0) (S16). When the landmarks capable of being confirmed with a driver's eyes are displayed selectively with reference to the approach road to the crossing or with reference to the approach road and an advance road, a position can be confirmed easily at the crossing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular navigation device that guides a vehicle along a preset route, and more specifically, selectively displays landmarks on a map or in an intersection map. The present invention relates to a vehicular navigation device that facilitates confirmation of a vehicle position on a route or an intersection by highlighting a selected landmark.

[0002]

2. Description of the Related Art In the route guidance by a vehicle navigation device, a detailed map is displayed from a wide area map by switching when the user wants to know the current location in detail while being guided along the route displayed on a map. Or
Alternatively, when a predetermined distance is reached to the guidance intersection, the intersection map is enlarged and displayed, and can be confirmed on these screens. If you are traveling straight ahead, you are traveling while checking some signs or landmarks such as facilities, but especially the mark (landmark) corresponding to the landmark is not limited to the one facing the route in the map, but the map in advance. 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 (guided intersection) on the conventional guide 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 course of the vehicle are displayed from the approach road 9 to the exit road 10 at a predetermined distance before the intersection 5. In this enlarged view, landmarks 6 such as hotel marks (H) and gas station marks (GS), which serve as marks of the intersection, are displayed. For example, Japanese Patent Laid-Open No. 3-15070
No. 0 proposes the display and highlighting of landmarks that serve as landmarks on the guidance intersections on the route.

However, in the conventional landmark display during the map display, all the landmarks are displayed even if they are far from the guide route, face the route, or do not need to guide the route. On the other hand, in the landmark display on the intersection map, the landmark to be displayed is determined regardless of the approach direction of the intersection, and there are cases where a landmark that cannot be confirmed in the approach direction is displayed. It was insufficient for that. For example, in the case of FIG. 16-1, the landmark of GS can be confirmed with respect to the approach road, but the landmark of the hotel (H) cannot be confirmed. In the case of FIG. 16-2, the landmark of GS cannot be confirmed on the approach road, but the landmark of the hotel (H) can be confirmed. In the case of FIG. 16-3, both the GS landmark and the hotel (H) landmark can be confirmed on the approach road. Further, in the case of FIG. 16-4, the landmark of GS cannot be confirmed for the approach road, but the landmark of the hotel (H) can be confirmed. In this way, the landmark displayed on the intersection map is unnecessary to confirm the intersection to the approach road of the vehicle,
Alternatively, there are some unnecessary but not very useful landmarks, and there are similar problems to the approach road and the exit road to the intersection of vehicles.

An object of the present invention is to provide a vehicle in which only landmarks that can be visually confirmed by a driver are selectively displayed on an approach road to an intersection, or only selected landmarks are highlighted. To provide a navigation device for a vehicle. Another purpose is to selectively display only the landmarks that the driver can visually recognize for the approach road to the intersection and the exit road from the intersection, or to highlight only the selected landmarks. To provide a vehicle navigation device having the above-mentioned structure. Another object of the present invention is to provide a vehicular navigation device that selectively displays landmarks displayed on a map. Another object of the present invention is to provide a vehicular navigation device in which a landmark facing a route being displayed on a map is selectively displayed or only the selected landmark is highlighted.

[0005]

In order to achieve the above-mentioned object, the present invention according to claim 1 is a vehicle navigation device for performing route guidance to a destination according to a preset route, which includes road data and Information storage means that stores intersection data and landmark data, current position detection means that detects the current position of the vehicle, route storage means that stores a preset route, and routes stored in the route storage means An intersection drawing means for obtaining the road data, the intersection data, and the landmark data stored in the information storage means on the basis of the drawing, and drawing the guidance intersection drawing; and a display means for displaying the guidance intersection drawing drawn by the intersection drawing means. The intersection drawing means displays on the guide intersection map based on the current vehicle position detected by the current position detection means and the route stored in the route storage means. In configuration with a landmark display determination means for selecting a landmark.

According to a second aspect of the present invention, there is provided a vehicle navigation device which guides a route to a destination according to a preset route, and an information storage means which stores at least road data, intersection data and landmark data. A current position detecting means for detecting the current position of the own vehicle, a route storing means for storing a preset route, and road data and intersection data stored in the information storing means based on the route stored in the route storing means And intersection display means for acquiring the landmark data and drawing the guidance intersection drawing, and display means for displaying the guidance intersection drawing drawn by the intersection drawing means. The intersection drawing means is detected by the current position detection means. A run for selecting a landmark to be highlighted in the guidance intersection based on the current vehicle position and the route stored in the route storage means. Has a mark display determining means, the display means is in the configuration so as to highlight the landmark selected by the landmark display determination unit.

According to a third aspect of the present invention, there is provided a vehicle navigation device that guides a route to a destination according to a preset route, the information storage means storing at least road data, intersection data, and landmark data. When,
Current position detecting means for detecting the current position of the own vehicle, route storing means for storing a preset route, road data and intersection data stored in the information storing means based on the route stored in the route storing means, At least two display modes are provided for each landmark data, including intersection drawing means for acquiring landmark data and drawing a guidance intersection drawing, and display means for displaying the guidance intersection drawing drawn by the intersection drawing means. The intersection drawing means selects a display form of landmarks to be displayed in the guidance intersection drawing based on the current vehicle position detected by the current position detection means and the route stored in the route storage means. The display means has a judging means, and the display means displays the landmark in the display form selected by the landmark display judging means. In the configuration.

Further, another invention related to claims 1, 2 and 3 is characterized by having the following configuration. (1) The display means provides guidance at the intersection drawn by the intersection drawing means before a predetermined distance from 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. It is configured to display an intersection map. (2) The landmark display determining means is configured to select the landmark facing the approach road to the guidance intersection. (3) The landmark display determining means is configured to select the landmarks facing the approach road and the exit road to the guidance intersection. (4) The landmark display determination means is configured to select a landmark facing a road in a straight direction with respect to the approach road and the exit road to the guidance intersection.

Further, the invention of claim 8 is a vehicle navigation device for guiding a route to a destination according to a preset route, and includes map data and landmark data including at least road data and intersection data. Stored in the information storage means, the current position detection means for detecting the current position of the host vehicle, the route storage means for storing a preset route, and the route and information storage means stored in the route storage means. The map drawing means includes a map drawing means for drawing a route to be guided on the map based on the map data and the landmark data, and a display means for displaying the map drawn by the map drawing means, and the map drawing means is the current position detecting means. A landmark for selecting a landmark to be displayed on the map based on the current vehicle position detected by the vehicle and the route stored in the route storage means. In configuration having shown determination means.

According to a ninth aspect of the present invention, there is provided a vehicle navigation device that guides a route to a destination according to a preset route, and stores map data including at least road data and 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 preset route, a route stored in the route storage means, and a map stored in the information storage means. The map drawing means includes a map drawing means for drawing a route to be guided on the map based on the data and the landmark data, and a display means for displaying the map drawn by the map drawing means. The map drawing means detects the current position detecting means. Landmark display for selecting a landmark to be highlighted on the map based on the present vehicle position and the route stored in the route storage means Has a cross section, the display unit is in a configuration to highlight the landmark selected by the landmark display determination unit.

According to a tenth aspect of the present invention, there is provided a vehicle navigation device for guiding a route to a destination according to a preset route, which is necessary for performing navigation with map data including road data and intersection data. An information storage unit that stores all data, a current position detection unit that detects the current position of the host vehicle, a route storage unit that stores a preset route, and a route and information storage unit that is stored in the route storage unit. A map drawing means for drawing a route to be guided on the map based on the map data stored in the map drawing means and a display means for displaying the map drawn by the map drawing means, and the information storage means stores landmark data. Then
Each landmark data is stored with at least two display forms, and the map drawing means displays it on the map based on the current vehicle position detected by the current position detection means and the route stored in the route storage means. The display means has a landmark display determining means for selecting the display format of the landmark, and the display means is configured to display with the landmark of the display format selected by the landmark display determining means.

Further, another invention related to claims 8, 9 and 10 is characterized by having the following construction. (1) The landmark display determining means is configured to select only the landmark facing the route. (2) The landmark display determining means is configured to select only the landmark in front of the traveling direction according to the current position of the vehicle, from the landmarks facing the route.

According to the above structure, the information storage means stores the landmark data, and the intersection drawing means determines the landmark display when the current vehicle position detected by the current position detection means reaches a predetermined distance before the intersection. The means selects a landmark to be displayed on the guide intersection based on the route stored in the route storage means, draws the landmark selected on the intersection diagram by the intersection drawing means, and outputs it to the display means for display. To do. The landmark display is selected and displayed from the landmarks stored in the storage means, or the selected landmark is highlighted. This makes it easier for the driver to confirm the landmark on the map or at the intersection. In particular, in the intersection map, the landmarks can be selectively displayed or highlighted only on the approach road and / or the exit road that can be visually confirmed by the driver, so that the position at the intersection can be easily confirmed. It can be carried out.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the system configuration of a navigation device. In FIG. 1, a navigation device is an input / output device 1 for inputting / outputting information about route guidance, a current position detection device 2 for detecting information about the current position of the vehicle, navigation data necessary for route calculation, and necessary for route guidance. Information storage device 3 that stores various guidance data, displays necessary for route search processing and route guidance
It is composed of a central processing unit 4 which executes voice guidance processing and controls the entire system.

The input / output device 1 can input information necessary for setting a destination such as a starting point, a destination, and a passing point, and can output voice guidance and / or screen display of guidance information when needed by a driver. In addition, it is provided with a function of instructing the central processing unit 4 to perform navigation processing according to the user's intention and printing out processed data and data of data communication. As a means to realize that function, the input unit uses the address, telephone number, and
The touch switch 11 is used to input coordinates and request route guidance. In addition, the output unit displays the input data on the screen, or displays the driver's request or route guidance automatically on the screen 1.
2. Data and information storage device 3 processed by the central processing unit 4
A printer 13 for printing out data and communication data stored in and a speaker 1 for outputting route guidance by voice
It consists of four.

The display 12 is composed of a color CRT or a color liquid crystal display, and is 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. In addition to outputting all screens in color display, keys for setting route guidance, guidance during route guidance, and switching screens are displayed on this screen. Further, the display 12 is provided with a touch switch 11 corresponding to the display of the function keys, and is configured to execute the above-mentioned operation based on a signal input by key touch. The current position detection device 2 is a satellite navigation system (G
GPS receiver 21 using a PS), a beacon receiver 22, for example, a mobile phone or G using an FM multiplex signal.
A data transmitting / receiving device 23 for receiving a PS correction signal, for example, an absolute azimuth sensor 24 including a geomagnetic sensor,
For example, a relative direction sensor 25 including a wheel sensor, a steering sensor, and the like, and a distance sensor 26 that detects a traveling distance from the number of rotations of the wheels are used to detect the traveling direction and position coordinates of the vehicle.

The information storage device 3 stores, for example, a map data file storing map information, an intersection data file storing information about intersections, road information such as road types and start / end points of each road, which are necessary for route guidance. Road data file, node data file that stores east longitude and north latitude coordinates at one point on the road, location coordinates of landmarks such as gas stations and convenience stores according to the purpose of use, and guidance on landmarks It is composed of a guide point data file or the like that stores information and the like.

The central processing unit 4 executes a program installed to realize the functions of the present system and performs arithmetic processing on the CPU 40, a program for performing processing such as route search, and landmark display and route at a guidance intersection. A program for performing display control required for guidance, voice output control required for voice guidance, and a first ROM 41 in which data necessary for the program is stored, road information after route search or re-search (road row data, guidance intersection data) A memory 42 configured by a RAM, a non-volatile memory or the like as a storage means for temporarily storing route guidance information and data during calculation processing, and display data necessary for route guidance and map display are stored. Second ROM 43, image memory 44 in which image data used for screen display on the display is stored, CP Image data from the image memory on the basis of a display control signal from the image processor 45, which performs image processing and outputs the image data to the display, voice data read from the information storage device 3 based on a voice output control command from the CPU (phrase A voice processor 46 for synthesizing a single sentence, sound, etc.) and converting the analog signal to output 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. It is composed of a sensor input interface 48 for taking in and a clock 49 for entering 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.

The precondition of the present invention is constituted by a function realizing means for guiding a route to a destination according to a preset route. The function realizing means includes a destination setting means, a route searching means, and an output means. That is, the destination setting means executes the program relating to the destination setting processing stored in the first ROM 41, the CPU 40,
The touch switch 11 and the display 12 of the input / output device 1 for inputting the destination and outputting the map display, the image processor 45 for displaying the map display, and the input signal of the destination from the touch switch 11 to the central processing unit 4 It is composed of an input / output processing means including an interface 47 for taking in. The route search means has a function of searching for a route to be guided based on the set starting point (current position of the vehicle) and destination, and is configured by the CPU 40 that executes the program related to the route search process stored in the first ROM 41. It The output means has a function of outputting guidance based on the searched route, and is a CPU that executes a program relating to display / sound processing stored in the first ROM 41.
40, an image processor 45, an audio processor 46, a display 12, a speaker 14, and the like.

As a characteristic part of the present invention, the function of drawing a landmark on an intersection map is realized by the following configuration. The storage means stores road data, intersection data, and all data required for navigation, and is configured by the information storage device 3. The route storage means stores a preset route and is configured by the memory 42 in the central processing unit. The current position detection means has a function of detecting the current position of the host vehicle, and is configured by the current position detection device 2. The intersection drawing means has a function of drawing a guidance intersection drawing based on the stored route, road data, and intersection data, and a CPU that executes a program related to the intersection drawing process stored in the first ROM 41.
40, an image processor 45, and an image memory 44. The display means has a function of displaying the guide intersection drawing that has been subjected to the drawing processing, and is configured by the display 12. The landmark display determining means has a function of selecting a landmark to be displayed in the guidance intersection drawing based on the detected current vehicle position and the acquired route data, and has the first ROM 41.
The CPU 42 executes a program relating to the landmark display determination processing stored in.

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 configured by the information storage device 3. The route storage means stores a preset route and is configured by the memory 42 in the central processing unit. The current position detection means has a function of detecting the current position of the host vehicle, and is configured by the current position detection device 2. The map drawing means has a function of drawing a map based on the stored route, road data, and map data, and is configured by a CPU 40, an image processor 45, and an image memory 44 that execute a program related to map drawing processing stored in the first ROM 41. To be done.
The display means has a function of displaying the map subjected to the drawing processing,
It is composed of the display 12. The landmark display determination means has a function of selecting a landmark to be displayed on the map based on the detected vehicle current position and the acquired route data, and executes the program relating to the landmark display determination processing stored in the first ROM 41. Composed by.

This system calculates an estimated position based on various sensor signals for current position detection and GPS data, and determines the position on the road by correlating the estimated position with the road on the map and GPS data. Find the current position. Further, the present system has a function of illuminating the current position on the route to the destination and determining whether or not the position on the lane of the own vehicle is approaching a predetermined guide point.
That is, the above function determines the predetermined distance before the intersection on the guidance route, the automatic audio output after the intersection is determined, and the timing of the intersection information display output 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 the determination. When the request signal is input, the voice processor is instructed to provide voice guidance of the current position. In addition, the voice guidance of this system includes voice data (phrase, 1
(Sentences, sounds, etc.) are combined, converted into an analog signal, and output from the voice output unit.

Next, the data structure relating to the display of landmarks will be described. Numbers are given to roads that connect at junctions, confluences, and intersections (hereinafter referred to as intersections, etc.), and a guide route is defined by node string data based on the road numbers. FIG.
Indicates a node train road network in which roads heading for intersections are numbered. For example, when the start point and the end point of the road are the intersections, for the road (1), the intersection II is the start point and the intersection I is the end point. 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 is possible to define as shown in the figure between each intersection and the road connecting it. Data of the node train road network of FIG. 2 is shown in FIG.
Shown in In this example, road data has landmark data. Each road has a road number, a next road number with the same start point, a next road number with the same end point, a start point, an end point, a node string pointer, and a road length. , And the number of landmarks.

Next, the selection of landmarks for each road will be described. The first embodiment of the landmark display is to select from landmarks prepared in advance and display the landmark on an intersection map or a map including the intersection map. First, the display of landmarks at intersections will be described. When making a right or left turn at an intersection, only landmarks that represent the landmarks around the intersection required for the right or left turn are selected and the landmarks are displayed. In FIG. 4, for example, when the road number (1) is the approach road, the landmarks located on the road (1) that is currently running and the road (6) that does not require guidance for the intersection are selected. Alternatively, the landmarks located on the road numbers (1), (2), (4), (5), (6) and (7) are selected.

Next, the case where the landmark data is stored in the intersection data will be described. The intersection data has the number of intersections as shown in FIG. 5, and the intersection number assigned to each intersection, the intersection coordinates (east longitude / north latitude coordinates), road information connected to the intersection, and landmark storage information. (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 number. , Facing road No. Is defined by
Here, when it is located at the corner of the intersection, two road data are stored. The mark pattern data is associated with the landmarks to be drawn by numbers. In the illustrated example, the number “0” is the XX bank mark drawing data and the number “1”.
◇◇ Has bank mark drawing data, etc.

When displaying a landmark on a map including an intersection map, it has landmark data to be displayed corresponding to the road data shown in FIG. That is, when the intersection data has landmark data, the landmark data is defined in detail 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. It In this way, the landmark is stored in association with each intersection data or map data including the intersection.

In the above example, the landmark coordinates are given at the east longitude and the north latitude, but as shown in FIG. 6, by giving an offset value (vector value with the intersection coordinates as the origin) based on the intersection coordinates, It is possible to easily control the drawing of the landmark on the enlarged view of the intersection with the approach direction to the upward direction. A data structure of another embodiment regarding display of landmarks will be described. In the second embodiment, when a selected landmark is highlighted on an intersection map or a map including an intersection map, the third embodiment displays at least two landmarks, and the landmark selected from these is displayed at the intersection. This is a case of displaying on a map including a map or an intersection map.

The data structure of landmarks displayed on the map is characterized by the display positions, attributes, and facing road numbers of all landmarks to be displayed on the map used for route guidance as shown in FIG. There is. In the landmark data, the “facing road No.” is not necessary because it is added to each road when the landmark data is stored in the road data as shown in FIG. Each landmark has landmark coordinates (east longitude, north latitude), landmark attributes, facing road number. 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. Defined by (small). Furthermore, the second and third embodiments can be combined.

The mark pattern data (large) is a mark unique to the mark, for example, a service mark of XX bank, a service mark of Δ △ GS (gas station), etc., so that the mark can be identified at a glance. is there. The mark pattern (small) is a mark that is generally used in the notation of the corresponding mark or a mark prepared in advance by the system, such as a bank mark or a GS mark, so that the mark can be identified at a glance. In this way, 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 patterns is used. 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. In this way, the mark display palette has separate palettes (combination of R, G, and B) for highlighting and not for highlighting. For example, highlighting has a higher brightness or color tone. Make it bright.

Next, the drawing process of the landmark display will be described. FIG. 8 shows a flow of intersection drawing drawing processing. Obtaining route data (S1), a predetermined distance before the guidance intersection,
For example, it is determined whether the vehicle has arrived 300 m before (S2), and if it has not arrived, the route data is acquired again. When reaching a predetermined distance from the guidance intersection, the relevant intersection data is acquired (S3), the connecting road data is acquired (S4), the landmark data is acquired (S5), and 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, the connecting road data to be acquired may be only the road connecting to the corresponding intersection acquired in step S3, or all the road data in a predetermined display area may be acquired and displayed. Is also good. In the processing of steps S5 to S7, the landmark is stored as image data in advance, the pattern data in FIGS. 5 and 7 is determined, and the image data is acquired and drawn at the corresponding coordinate position. Let

The landmark display determination processing in step S6 will be described. The landmark is the approach road in Figure 9,
The landmark display determination process when the vehicle faces an approach road or a straight road is shown. 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 in order to perform display determination on all the acquired landmarks (S10).
11). It is determined whether the landmark faces the approach road (S12). If the landmark does not face the approach road, it is determined whether or not the landmark faces the approach road (S1).
3). If neither the approach road nor the exit road is faced, it is judged whether or not the road faces a straight road (S14). In steps S12 to S14, if the road faces any of the roads, the process of displaying the landmark on the road is performed (M
Set ODE = 1) (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 of the target landmarks are judged (S17), and the process ends.

In the above example, when the landmark is displayed, the approach road, the exit road, and the straight road are selected as references, but the one on the left side or the right side in the traveling direction, for example, the left side in the case of Japan. You may select or emphasize the one in. This is because there are wide roads in the city and it is difficult to see what is on the right side due to the median strip and congestion of cars, but even in such a case, if the landmark is displayed on the left side, driving The person can be surely recognized. As for the landmark display processing, in another embodiment, the shaded area 11 shown in FIG.
It may be controlled so that only those whose offset values from the coordinates (east longitude, north latitude) are within the display range are displayed. In the illustrated example, only the landmarks at the corners of the guidance intersection that can be confirmed while traveling on the approach road 9 and the landmarks facing the exit road 10 are displayed.

11 and 12 show specific examples of landmark display for intersections. These two figures show the case where the approach directions are different at the same intersection, and in FIG. 11, the case of going from the road of the road number to the road of the road number and in FIG. Shows. In this example, landmarks facing the approach road and the exit road are highlighted. When this landmark display is display-controlled using the data structure of FIG. 7,
The gas station (2) is a pattern (small) in FIG.
In FIG. 12, the patterns (large) are displayed respectively. On the other hand, the convenience store mark (3) is displayed as a pattern (large) in FIG. 11 and a pattern (small) in FIG.

In addition, as a method of highlighting, a method of changing the brightness or contrast without changing the shape of the mark, a method of putting a frame on the mark to be highlighted, 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, but the road can be recognized when the route is intentionally or mistakenly left. For example, FIG.
When you turn toward the road at intersection 1, you must see the highlighted gas station mark (1) on your right hand and take a left turn. The gas station mark (1) should be on your left hand. Turn right after seeing and follow the road facing the convenience store mark (3).

Since the road facing the gas station mark (1) is taken with the right hand, the driver can recognize that the road is different from the guide road. The landmark display 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 shows only the landmark facing the route. In the example of FIG. 14, only the mark on the route and in the forward direction of the vehicle is displayed. Alternatively, only specific marks may be highlighted. With this configuration, it is possible to selectively display the information effective for route guidance in the limited display space of the vehicle-mounted display device. In addition, the landmarks may be thinned out in consideration of the display density (character information, etc.) on the map currently being displayed. The present invention may be configured by combining selective display and highlight display of landmarks, or either one of them, and allowing the user to select one that displays all of these and a predetermined landmark. 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 of the present invention.

FIG. 2 is an explanatory diagram of a node train 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 the intersection.

FIG. 5 is an explanatory diagram of intersection data defining land marta data.

FIG. 6 is an explanatory diagram of another embodiment of a landmark data structure.

FIG. 7 is an explanatory diagram of another embodiment of a landmark data structure.

FIG. 8 is a flowchart of an intersection diagram drawing process.

FIG. 9 is a flowchart of landmark display determination processing.

FIG. 10 is an explanatory diagram of another embodiment of 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 the approach road is different from FIG. 11.

FIG. 13 is an explanatory diagram of a case where only a land marta facing a route is displayed.

FIG. 14 is an explanatory diagram of a case where only a land marter on the route and in front of the traveling direction of the vehicle is displayed.

FIG. 15 is an explanatory diagram of landmark display in a conventional intersection map.

FIG. 16 is an explanatory diagram of a conventional landmark display example.

[Explanation of symbols]

1 ... Input / output device, 2 ... Current position detection device, 3 ... Information storage device, 4 ... Central processing unit, 5 ... Intersection, 6 ... Landmark, 7 ... Current position mark of vehicle, 8 ... Direction arrow, 9 ... Entry Road, 10 ... Exit road, 11 ... Landmark display range

Claims (12)

[Claims] 1. A navigation device for a vehicle that guides a route to a destination according to a preset route, the information storage unit storing at least road data, intersection data, and landmark data. Present position detecting means for detecting the present position, route storing means for storing a preset route, road data and intersection data and land stored in the information storing means based on the route stored in the route storing means An intersection drawing means for obtaining mark data and drawing a guidance intersection drawing, and a display means for displaying the guidance intersection drawing drawn by the intersection drawing means, wherein the intersection drawing means is detected by the current position detection means The landmarks to be displayed in the guide intersection map are displayed based on the present vehicle position and the route stored in the route storage means. Vehicle navigation apparatus characterized by having a landmark display determination means for-option. 2. A vehicle navigation device that guides a route to a destination according to a preset route, the information storage means storing at least road data, intersection data, and landmark data, and Present position detecting means for detecting the present position, route storing means for storing a preset route, road data and intersection data and land stored in the information storing means based on the route stored in the route storing means An intersection drawing means for obtaining mark data and drawing a guidance intersection drawing, and a display means for displaying the guidance intersection drawing drawn by the intersection drawing means, wherein the intersection drawing means is detected by the current position detection means Landmarker highlighted in the guidance intersection map based on the present vehicle position and the route stored in the route storage means. A vehicle navigation device comprising: landmark display determining means for selecting a mark, and the display means highlights the landmark selected by the landmark display determining means. 3. A vehicle navigation device that guides a route to a destination according to a preset route, the information storage means storing at least road data, intersection data, and landmark data. Present position detecting means for detecting the present position, route storing means for storing a preset route, road data and intersection data and land stored in the information storing means based on the route stored in the route storing means At least two display modes are provided for each landmark data, including intersection drawing means for obtaining mark data and drawing a guidance intersection drawing, and display means for displaying the guidance intersection drawing drawn by the intersection drawing means. And store the intersection drawing means,
The vehicle display device further comprises landmark display judging means for selecting a display form of landmarks to be displayed in the guide intersection map based on the current vehicle position detected by the current position detecting means and the route stored in the route storing means. The vehicle navigation device is characterized in that the means displays the landmark in the display form selected by the landmark display determining means. 4. The display means draws by the intersection drawing means a predetermined distance before an 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. The vehicle navigation device according to any one of claims 1, 2 and 3, wherein a guide intersection map at the intersection is displayed. 5. The vehicle navigation device according to claim 1, wherein the landmark display determining means selects a landmark facing the approach road to the guidance intersection. 6. The vehicle navigation device according to claim 1, wherein the landmark display determination means selects a landmark facing the approach road and the exit road to the guidance intersection. . 7. The landmark display determination means selects a landmark facing a road in a straight direction with respect to an approach road and an exit road to a guidance intersection.
The vehicle navigation device according to any one of 2 and 3. 8. A vehicle navigation device for guiding a route to a destination according to a preset route, comprising: information storage means storing map data including at least road data and intersection data, and landmark data. Present position detecting means for detecting the present position of the own vehicle; route storing means for storing a preset route; route stored in the route storing means; map data and land stored in the information storing means; The map drawing means includes a map drawing means for drawing a route to be guided based on the mark data so as to be superimposed on a map, and a display means for displaying the map drawn by the map drawing means. Land for selecting a landmark to be displayed on the map based on the detected current vehicle position and the route stored in the route storage means A vehicular navigation device comprising mark display judging means. 9. A vehicle navigation device for guiding a route to a destination according to a preset route, the information storage means storing map data including at least road data and intersection data, and landmark data. Present position detecting means for detecting the present position of the own vehicle; route storing means for storing a preset route; route stored in the route storing means; map data and land stored in the information storing means; A map drawing means for drawing a route to be guided based on the mark data on a map and a display means for displaying the map drawn by the map drawing means; and the information storage means stores landmark data, The map drawing means is based on the current vehicle position detected by the current position detecting means and the route stored in the route storing means. A vehicle navigation device comprising: landmark display determining means for selecting a landmark to be highlighted on the map, wherein the displaying means highlights the landmark selected by the landmark display determining means. 10. A vehicle navigation device that guides a route to a destination according to a preset route, comprising: information storage means that stores map data including at least road data and intersection data, and landmark data. Present position detecting means for detecting the present position of the own vehicle; route storing means for storing a preset route; route stored in the route storing means; map data and land stored in the information storing means; At least two displays are provided for each landmark data, including map drawing means for drawing a route to be guided based on the mark data so as to be drawn on the map, and display means for displaying the map drawn by the map drawing means. The map drawing means stores the vehicle current position detected by the current position detection means and the history. It has a landmark display judging means for selecting the display form of the landmark to be displayed on the map based on the route stored in the road storage means, and the display means has the display form selected by the landmark display judging means. A vehicle navigation device characterized by displaying landmarks. 11. The vehicle navigation device according to claim 8, wherein the landmark display determination means selects only the landmark facing the route. 12. The landmark display determining means selects only a landmark, which is ahead in the traveling direction according to the current position of the vehicle, from the landmarks facing the route. The vehicle navigation device according to any one of the above.