JP2002286466A - Guiding route displaying method and expanded chart displaying method for on-vehicle navigators - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guiding route displaying method for on-vehicle navigators which indicates main points on a guiding route in an enlarged view (schematic diagram) to make a user previously recognize the situations of the main points on the guiding route. SOLUTION: The displaying method comprises a step for searching for a guiding route, extracting main points between a departure point and a destination, and displaying an enlarged view (schematic diagram) of the main points in displaying the guiding route on a display. The main points extracted in an initial state include a departure point, a destination, road names on the guiding route, road name changing points on the guiding route, tollgates of toll roads, interchanges of highways, main facilities along the guiding road, etc., and the user may set main points.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guidance route display method for a vehicle-mounted navigation device for searching for a guidance route to a destination and appropriately providing guidance information to a user so that a vehicle travels along the guidance route. And an enlarged view display method.

[0002]

2. Description of the Related Art An on-vehicle navigation device is a DVD (Digital Versatile Disk) -RO storing map data.
M, a map data storage device, a display device, a gyro,
It has a vehicle position detecting device for detecting the current position and current direction of the vehicle, such as a GPS (Global Positioning System) receiver and a vehicle speed sensor. Then, the map data including the current position of the vehicle is read from the map data storage device,
Based on the map data, a map image around the vehicle position is drawn, a vehicle position mark (location) is superimposed on the map image and displayed, and the map image is scrolled or displayed according to the movement of the vehicle. Is fixed on the screen and the vehicle position mark is moved so that the user can see at a glance where the vehicle is currently traveling.

[0003] In addition, usually, a car navigation system is equipped with a route guidance function that allows a user to easily travel to a desired destination without making a mistake on a road. According to this route guidance function, the lowest cost route from the starting point to the destination using the map data is automatically searched by performing a simulation calculation such as the horizontal search method or the Dijkstra method, and the searched route is guided. The route is stored as a route, and during driving, the guidance route is drawn on the map image in a different color from the other roads and displayed thicker, or displayed on the screen, or a certain distance to the intersection where the vehicle should change the route on the guidance route When approaching the inside, the user is guided to the destination by drawing an arrow indicating the course at the intersection where the course is to be changed on the map image and displaying the arrow on the screen.

The cost is a value obtained by multiplying a constant according to a road width, a road type (such as a general road or an expressway), a right turn, a left turn, and the like based on the distance, a predicted traveling time of the vehicle, and the like. , The degree of appropriateness as a guidance route is quantified. Even if there are two routes having the same distance, the cost differs depending on whether the user specifies, for example, whether to use a toll road, or gives priority to distance or time.

[0005]

SUMMARY OF THE INVENTION The present inventors consider that the conventional navigation device has the following problems. That is, in the conventional navigation device,
When the user sets the destination, the current position of the vehicle is set as the departure point, and a guidance route from the departure point to the destination is searched. For example, as shown in FIG. The main passing points and the distance between those passing points are displayed.

[0006] However, in the display shown in FIG.
Although it is possible to know what route to follow to get to the destination, for example, what facilities are along the guidance route, or when there is an intersection that makes a right or left turn, what is the landmark for that intersection? I do not know if I should look for. Further, in a conventional on-vehicle navigation device, for example, when a vehicle approaches an intersection, an enlarged view (schematic diagram) is displayed on a part of the screen as shown in FIG. The display scale of this enlarged view is constant and cannot be changed by the user. However, depending on the road conditions, it may be easier to see a wider area or to enlarge it further.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a navigation route for an in-vehicle navigation device in which main points on a guidance route are displayed in an enlarged view (schematic diagram) so that the user can recognize the state of the main points on the guidance route in advance. The purpose is to provide a display method. Another object of the present invention is to provide an enlarged view of an in-vehicle navigation device that makes it easier to use the enlarged view by making it possible to change the display scale of an enlarged view (schematic view) displayed when approaching an intersection or the like. The purpose is to provide a display method.

[0008]

According to the present invention, there is provided a method for displaying a guidance route of an on-vehicle navigation device, wherein after searching for a guidance route, an enlarged view of a main point from a departure point to a destination is displayed on a display device. It is characterized by the following. The enlarged view is drawn using, for example, map data stored in a map data storage unit. Preferably, the main points can be set by a user. Further, it is preferable that the display scale of the enlarged view can be changed for each main point. Furthermore, it is preferable that a point displayed on the enlarged view can be registered.

In the present invention, after searching for a guidance route, an enlarged view (schematic diagram) of a main point on the guidance route is displayed on a display device. Accordingly, the user can confirm in advance what kind of facilities are along the guidance route, so that the user can more reliably travel along the guidance route. In addition, if the user can specify what kind of facility is to be extracted as the main point, the facility according to the user's suitability can be used as a mark of the guidance route, so that traveling along the guidance route is easier. become.

Further, if the display scale of the enlarged view can be changed for each main point, the visibility of the enlarged view is improved. Furthermore, it is preferable that the points displayed on the enlarged view can be registered. This makes it possible to easily set the point found in the enlarged view as a destination or a waypoint. An enlarged view display method for an in-vehicle navigation device according to the present invention is characterized in that the display scale of the enlarged view displayed on the display device can be changed.

This makes it easier to see the enlarged view,
The situation of the point displayed on the enlarged view can be grasped more accurately.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. (First Embodiment) FIG. 1 is a block diagram showing a configuration of an in-vehicle navigation device that realizes a guidance route display method according to a first embodiment of the present invention.

1 is a DVD-ROM storing map data
It is. Map data is 1/12500, 1/25000, 1/50000
, And is divided into longitude and latitude widths of appropriate sizes according to the scale level such as 1 / 10,000, and roads are stored as a coordinate set of vertices (nodes) represented by longitude and latitude. The map data includes (1) a road layer including a road list, a node table, an intersection configuration node list, and the like; (2) a background layer for displaying roads, buildings, parks, rivers, and the like on a map screen; 3) A character / symbol layer for displaying characters such as city names, road names, intersection names, building names, etc., characters and map symbols, and (4) buildings that serve as landmarks on the map And landmark data for displaying marks (icons) of stores and the like.

Further, the DVD-ROM 1 records a facility database composed of data of many facilities. One facility data is composed of data such as facility name, genre (type of convenience store, family restaurant, amusement park, police station, fire station, etc.), position (latitude / longitude), address, and telephone number. Reference numeral 3 denotes an operation unit for operating a navigation device body 10 described later. The operation unit 3 includes, for example, a remote control transmitter 30 as shown in FIG. This remote control transmitter 30
Includes a joystick 31 for moving a pointer (cursor) displayed on the screen up, down, left and right,
Various buttons such as a button 32, a "menu" button 33, a "return" button 34, a "details" button 35, and a "wide area" button 36 are provided.

Reference numeral 5 denotes a GPS receiver which receives a GPS signal transmitted from a GPS satellite and detects the longitude and latitude of the current position of the vehicle. Reference numeral 6 denotes a self-contained navigation sensor. The self-contained navigation sensor 6 includes an angle sensor 6a such as a gyro for detecting a rotation angle of the vehicle, and a traveling distance sensor 6b for generating a pulse at every constant traveling distance. 7
Is a liquid crystal display device, and the navigation device body 10
Displays a map around the current position of the vehicle on the display device 7, a guidance route from the departure point to the destination, a vehicle position mark, and other guidance information. Reference numeral 8 denotes a speaker for providing guidance to the user by voice.

The navigation apparatus main body 10 comprises the following. Reference numeral 11 denotes a buffer memory for temporarily storing map data read from the DVD-ROM 1. Reference numeral 13 denotes an interface connected to the operation unit 3, reference numeral 15 denotes an interface connected to the GPS receiver 5, and reference numeral 16 denotes an interface connected to the self-contained navigation sensor 6.

Reference numeral 17 denotes a control unit constituted by a microcomputer. The control unit 17 controls the interface 1
The current position of the vehicle is detected based on the information input from 5 and 16, predetermined map data is read from the DVD-ROM 1 to the buffer memory 11,
Various kinds of processing are performed, such as searching for a guidance route using the search conditions set using the map data read out in the above, searching for a specific facility using the facility database of the DVD-ROM 1, and the like.

Reference numeral 18 denotes a map drawing unit for generating a map image using the map data read into the buffer memory 11;
Reference numeral 9 denotes an operation screen / mark generation unit that generates various menu screens (operation screens) and various marks such as a vehicle position mark and a pointer according to the operation status. Reference numeral 20 denotes a guidance route storage unit that stores the guidance route searched by the control unit 17, and reference numeral 21 denotes a guidance route drawing unit that draws the guidance route. In the guidance route storage unit 20, all nodes of the guidance route searched by the control unit 17 are recorded from the departure place to the destination. When displaying the map, the guidance route drawing unit 21 stores the guidance route storage unit 20.
, The guidance route information (node sequence) is read out, and the guidance route is drawn in a color and line width different from those of other roads.

An audio output section 22 supplies an audio signal to the speaker 8 based on a signal from the control section 17.
Reference numeral 24 denotes an image synthesizing unit, which superimposes on the map image drawn by the map drawing unit 18, various marks and operation screens generated by the operation screen / mark generation unit 19, a guidance route drawn by the guidance route drawing unit 21, and the like. To display on the display device 7.

In the navigation device configured as described above, the control unit 17 controls the G signal received by the GPS receiver 5.
The current position of the vehicle is detected from the PS signal and the signal input from the self-contained navigation sensor 6. And DVD-ROM1
, The map data around the current position of the vehicle is read out and stored in the buffer memory 11. The map drawing unit 18 generates a map image based on the map data read into the buffer memory 11, and displays a map image around the current position of the vehicle on the display device 7.

The control unit 17 detects the current position of the vehicle based on signals input from the GPS receiver 5 and the self-contained navigation sensor 6 as the vehicle moves, and displays the current position on the display device 7 according to the detection result. The vehicle position mark is superimposed on the displayed map image, and the vehicle position mark is moved with the movement of the vehicle, or the map image is scroll-displayed. Hereinafter, the guidance route display method of the vehicle-mounted navigation device according to the present embodiment will be described with reference to the flowchart shown in FIG.

First, in step S11, when the user sets a destination, the control unit 17 sets the current position of the vehicle as the departure point, and stores map data in the range from the vicinity of the departure point to the vicinity of the destination from the DVD-ROM 1 in the buffer memory. Read to 11. Then, the process proceeds to step S12, and the control unit 17
Searches for the lowest cost route from the starting point to the destination by using a known horizontal search method or a simulation calculation such as the Dijkstra method using these map data,
It will be a guidance route. All nodes of the searched guidance route are stored in the guidance route storage unit 20.

Thereafter, the flow shifts to step S13 to determine a main point for displaying the enlarged view. In the initial state, the departure point, the destination, the place where the road name on the guide route changes (for example, the No. 6 Misato Line from the Joban Expressway), the tollgate on the toll road, and the place where the guide route intersects the national road , Highway interchanges, and major facilities (for example, famous buildings and tourist attractions) along the guidance route are extracted.

Further, in this embodiment, the user can designate the main points. For example, when the user designates a genre of a facility such as a convenience store, a family restaurant, a gas station, or the like as a main point, the control unit 7 extracts these facilities existing along the guidance route and determines the extracted facility as a main point. Points.

After extracting the main points along the guidance route in the initial state or under the conditions set by the user, the control unit 17 proceeds to step S14 and displays the guidance route on the display device 7. In this case, in the present embodiment, as shown in FIG. 4, an enlarged view of the main points from the departure point to the destination and the distance between the main points are displayed. In the enlarged view, the shape of the road (width and angle), facilities and their icons serving as surrounding landmarks, road names and facility names, etc. are extracted from the map data and drawn from the data.

In the example shown in FIG. 4, the first four
An enlarged view of one of the main points is displayed. However, by operating the joystick 31 of the remote control transmitter 30 and scrolling the screen up and down, the other main points and the enlarged view thereof can be displayed. According to the present embodiment, after searching for a guidance route, an enlarged view of a main point of the guidance route is displayed on the display device 7, so that the user can use facilities serving as landmarks on the guidance route, states of major intersections,
It is possible to visually confirm in advance facilities and the like that serve as landmarks along other guidance routes. As a result, the effect that the safety during traveling of the vehicle is further improved is obtained.

In this embodiment, the user can set the genre of the facility which is the main point.
A facility according to the suitability of the user can be used as a mark of the guidance route. Thereby, there is also an advantage that the user can more accurately recognize the guidance route. (Modification 1) Hereinafter, Modification 1 of the first embodiment will be described. As shown in FIG. 4, on the screen on which the enlarged view of the main point on the guidance route is displayed, when the pointer is moved to the desired enlarged view and the “OK” button 32 of the remote control transmitter 30 is pressed, the enlarged view is displayed. Selected. As shown in FIG. 5, the selected enlarged view has a thicker frame. Then, when the "wide area" button 36 of the remote control transmitter 30 is pressed, the display scale of the enlarged view is enlarged as shown in FIG. 6, and a wider range is displayed. When the "details" button 35 of the remote control transmitter 30 is pressed, the display scale of the enlarged view is reduced, and the map is enlarged. In this way, by changing the display scale of the enlarged view according to the user's preference, the effect of improving the visibility of the enlarged view is achieved.

The display scale may be set for each main point by the user. For example, on a setting screen as shown in FIG. 7, the display scale of the main point can be set for each item. As a result, the enlarged view is displayed on the optimum display scale according to the type of the main point. When "automatic" is set on the setting screen shown in FIG. 7, an enlarged view is displayed on a display scale recommended by the manufacturer.

(Modification 2) Hereinafter, Modification 2 of the first embodiment will be described. As shown in FIG. 4, on the screen on which the enlarged view of the main point on the guidance route is displayed, when the pointer is moved to the desired enlarged view and the “OK” button 32 of the remote control transmitter 30 is pressed, the enlarged view is displayed. When selected, the frame line surrounding the enlarged view becomes thicker as shown in FIG. Here, when the “enter” button 32 is pressed again, a menu as shown in FIG. 8 is displayed. In this menu,
When "set as destination" is selected, the destination is changed to the point displayed in the enlarged view, and the vehicle is guided.
However, in this case, instead of discarding the guidance route to the original destination, when the vehicle arrives at the changed destination, a message asking the user whether to continue guidance to the original destination is displayed. Is displayed, and when the user desires guidance to the original destination, the guidance route storage unit 20
Is continued along the guidance route stored in the vehicle.

When "set as a stopover" is selected in the menu shown in FIG. 8, the main point is set as a stopover, the vehicle is guided to the stopover, and then the guidance is continued toward the destination. . When "register a point" is selected in the menu shown in FIG. 8, the point displayed on the enlarged view is added to the point registration list. The registered point can then be easily recalled when setting a destination or a stopover.

As described above, the convenience of the navigation apparatus is further improved by enabling the points found in the enlarged view to be easily registered. (Second Embodiment) Hereinafter, a method of displaying an enlarged view of a vehicle-mounted navigation device according to a second embodiment of the present invention will be described. Note that, also in the present embodiment, the configuration of the on-vehicle navigation device is the same as that of the above-described first embodiment, and will be described with reference to FIGS.

Conventionally, when the vehicle approaches a main intersection to a certain distance, the control unit 17 displays an enlarged view of the intersection on a part of the screen of the display device 7 as shown in FIG. However, conventionally, the display scale of the enlarged view is constant,
It could not be changed. On the other hand, in the present embodiment, when the “wide area” button 36 of the remote control transmitter 30 is pressed while the enlarged view is displayed as shown in FIG. 9, the display scale of the enlarged view is increased, and FIG. The range displayed in the enlarged view as shown in FIG. On the other hand, when the "details" button 35 of the remote control transmitter 30 is pressed, the display of the enlarged view becomes smaller and the map is enlarged. This makes it easier to see the enlarged view, and it is possible to more accurately grasp the situation of the point displayed on the enlarged view.

On the setting screen as shown in FIG. 7, the display scale of the enlarged view is set to 10 m scale, 50 m scale,
Any of the 100 m scale, the 200 m scale, and automatic may be set.

[0034]

As described above, according to the guidance route display method for a vehicle-mounted navigation device of the present invention, after searching for a guidance route, an enlarged view (schematic diagram) of a main point of the guidance route is displayed. , The user can confirm in advance what facilities are along the guidance route. Thereby, there is an effect that it is possible to more reliably travel along the guidance route. In addition, if the user can specify what kind of facility is to be extracted as the main point, the facility according to the user's suitability can be used as a mark of the guidance route, so that traveling along the guidance route is easier. become. Furthermore, by making it possible to register the points displayed on the enlarged view, the convenience of the navigation device is further improved.

According to the method for displaying an enlarged view of an on-vehicle navigation device of the present invention, the display scale of the enlarged view displayed on the display device can be changed, so that the enlarged view is more easily seen and the points displayed on the enlarged view are displayed. Can be grasped more accurately.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an in-vehicle navigation device that realizes a guidance route display method according to an embodiment of the present invention.

FIG. 2 is a plan view showing a remote control transmitter.

FIG. 3 is a flowchart illustrating a guidance route display method of the vehicle-mounted navigation device according to the embodiment of the present invention.

FIG. 4 is a diagram illustrating an example (part 1) of a display screen after a guide route search.

FIG. 5 is a diagram illustrating an example (part 2) of a display screen after a guide route search.

FIG. 6 is a diagram illustrating an example of changing a display scale of an enlarged view.

FIG. 7 is a diagram illustrating an example of a scale setting screen of an enlarged view.

FIG. 8 is a diagram illustrating an example (part 3) of the display screen after the guidance route search.

FIG. 9 is a diagram illustrating an enlarged view display method of the in-vehicle navigation device according to the present invention, and is a view illustrating an example of an enlarged view displayed when approaching an intersection.

FIG. 10 is a diagram showing an enlarged view display method of the in-vehicle navigation device of the present invention, and is a view showing an example of a display screen when the display scale of the enlarged view is changed.

FIG. 11 is a diagram showing an example of a conventional guidance route display method of a vehicle-mounted navigation device.

FIG. 12 is a diagram showing an example of an enlarged view display method of a conventional in-vehicle navigation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... DVD-ROM, 2 ... Operation part, 5 ... GPS receiver, 6 ... Self-contained navigation sensor, 7 ... Display device, 10 ... Navigation device main body, 11 ... Buffer memory, 17 ... Control part, 18 ... Map drawing part, 19: operation screen / mark generation unit, 20: guidance route storage unit, 21: guidance route drawing unit, 24: image synthesis unit, 30: remote control transmitter.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C032 HB06 HB07 HB08 HB22 HC24 HC25 HC31 HD03 HD16 HD21 2F029 AA02 AB01 AB07 AC02 AC09 AC14 AC18 5H180 AA01 BB13 CC12 FF04 FF05 FF23 FF25 FF27 FF32 FF38

Claims (6)

[Claims] 1. A map data storage means for storing map data, and a position detection means for detecting a current position of a vehicle, wherein a search for a guidance route to a destination is performed using the map data, In a guidance route display method of an in-vehicle navigation device that guides a vehicle to a destination along the guidance route while detecting a current position of the vehicle with a detection unit, the method includes: searching for the guidance route; A method for displaying a guidance route of an in-vehicle navigation device, characterized by displaying an enlarged view of a main point between them on a display device. 2. The method according to claim 1, wherein the enlarged view is drawn by using map data stored in the map data storage unit. 3. The method according to claim 1, wherein the main points can be set by a user. 4. The display scale of the enlarged view can be changed for each of the main points.
3. A method for displaying a guidance route of a vehicle-mounted navigation device according to claim 1. 5. The method according to claim 1, wherein a point displayed on the enlarged view can be registered. 6. A map data storage means for storing map data, and a position detection means for detecting a current position of the vehicle, wherein a search for a guidance route to a destination is performed using the map data, In an enlarged map display method for an in-vehicle navigation device that guides a vehicle to a destination along the guidance route while detecting a current position of the vehicle with a detection unit, a display scale of the enlarged map displayed on the display device can be changed. A method for displaying an enlarged view of an in-vehicle navigation device, characterized by comprising: