JP2002039764A - Map displaying method for navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to easily change a map while grasping the map. SOLUTION: A main screen MDP, which displays a detailed map, and a sub screen SDP, which displays a wide area map, are placed, and then the sub screen SDP is divided into a plurality of regions and the detailed map of a center region, where a cursor CR shows, is displayed on a main screen MDP. The detailed map of the area, where the cursor CR reaches, is displayed on the main screen MDP when the cursor CR moves and therewith the wide area map around an area that the cursor CR indicates, is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map display method for a navigation apparatus, and more particularly, to a method for displaying a display screen on a navigation device.
The present invention relates to a map display method of a navigation device that divides a screen into two screens and displays both a wide area map and a detailed map.

[0002]

2. Description of the Related Art A navigation device that provides guidance of a vehicle so that a driver can easily arrive at a desired destination is detected by detecting the position of the vehicle and using a CD-ROM or DVD-R.
The map data around the vehicle is read from the OM, the map is displayed on the display screen, and a vehicle position mark (own vehicle position mark) is displayed at a predetermined position on the map. Then, as the current position changes due to the movement of the vehicle, the own vehicle position mark on the screen is moved, or the own vehicle position mark is fixed at a predetermined position in the center of the screen and the map is scrolled, and the vehicle position mark is always displayed around the vehicle position. Map information at a glance.

[0003] Normally, a navigation device 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 displayed in a different color from other roads and displayed thicker, and an arrow indicating the route to the intersection where the route needs to be changed on the guidance route to the destination is displayed. Or
When approaching a predetermined distance from the intersection to be turned,
Guidance is provided by voice or the like to guide the user to the destination.

[0004] The navigation device usually has a function of changing the scale of the map displayed on the display screen according to the user's preference and scrolling the map displayed on the display screen. And moving the map display such that the map is scrolled so that the destination point is on the display screen.
In order to scroll the map, the user moves the map display area so that a desired point is displayed on the display screen by inputting a direction instruction key provided on the operation unit in a direction in which the user wants to scroll. Then, a desired point is displayed on the display screen and set as a destination.

[0005]

When a destination is set, a cursor is generally moved relative to the map while a relatively wide area map is displayed, and the destination is included in the display screen. In this case, the display is switched to a detailed map display, and the destination on the detailed map is indicated by a cursor. The reason for using the wide area map and the detailed map together is that the detailed map alone requires a long time to display the map including the destination on the display screen and loses track of the position indicated by the cursor. This is because the destination cannot be accurately input using only the map. Also, when checking what kind of guidance route has been set, the display of the wide area map and the display of the detailed map are switched as appropriate.

As described above, the setting of a destination and the confirmation of what kind of guidance route has been set have conventionally been performed by appropriately switching between displaying a wide area map and a detailed map. Therefore, there is a problem that the enlargement / reduction operation (map scale change operation) is troublesome and that the map cannot be easily grasped. Furthermore, during scrolling, it is necessary to keep inputting the direction key in the direction in which the user wants to scroll while looking at the display screen, and it is difficult for the driver to scroll the map while driving.

[0007] There is also a display screen which is divided into two screens, and a detailed map is displayed on one screen and a wide area map is displayed on the other screen. During scrolling, a direction key is input in a scrolling direction. Have to keep doing
Furthermore, during scrolling, the user must keep watching the screen until a map of a desired area is displayed. If a scroll operation is performed during driving, the user may go too far from a map of a desired area or lose a desired area, and it is difficult to perform the scroll operation during driving.

Accordingly, an object of the present invention is to provide a map display method for a navigation device which can move to a map of a desired area by a simple operation and can display a map of the desired area while grasping the map. It is to provide.

[0009]

According to the present invention, there is provided a map display method for a navigation device for displaying a detailed map and a wide area map on a main screen and a sub screen of a display screen, respectively. Is divided into multiple areas, and a detailed map corresponding to the sub-screen center area is displayed on the main screen. When changing the detailed map display area on the main screen, the main map is displayed on the wide-area map displayed on the sub-screen. Input means for inputting the direction from the area corresponding to the detailed map display area on the screen to the area to be changed is provided, and a detailed map of an area adjacent to the direction input from the central area of the sub screen is newly added to the main screen. This is achieved by displaying a wide-area map centered on the detailed map area displayed on the main screen on the sub-screen while displaying the main screen.

Further, according to the present invention, there is provided a map display method for a navigation device for displaying a detailed map and a wide area map on a main screen and a sub-screen of a display screen, respectively, wherein the sub-screen is divided into a plurality of areas. In addition to giving an area name to each area, voice input means for inputting the area name is provided, and a detailed map corresponding to the area name input by the voice input means is displayed on the main screen, This is achieved by displaying a wide area map centered on the detailed map area displayed on the main screen on the sub screen.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (a) First Embodiment FIG. 1 is a schematic explanatory view of a first embodiment, showing a display example of a navigation device when the present invention is applied. In the figure, MDP is a main screen, SDP is a sub screen,
CR indicates a cursor, CM indicates a vehicle position mark indicating a vehicle position, and RD indicates a road. A detailed map around the vehicle position is displayed on the main screen MDP, and a wide-area map including a map area displayed on the main screen is displayed on the sub-screen SDP.

As shown in FIG. 1A, the sub screen SDP
The detailed map of the area (here, the area S5) indicated by the cursor CR of the wide area map displayed on the main screen MDP is displayed on the main screen MDP. Here, the user moves the cursor on the sub-screen by moving the direction key of the operation unit in a desired direction. For example, as shown in FIG. 1B, when the cursor is moved to the area S1 by inputting the direction key in the upper left direction, the area S
The detailed map 1 is displayed on the main screen MDP. afterwards,
The area indicated by the cursor CR on the sub-screen SDP is moved to the center of the sub-screen, and a detailed map of the newly selected area is displayed on the main screen as shown in FIG. Displays a wide area map centered on the selected area.

In this way, the detailed map displayed on the main screen MDP is switched on a region-by-region basis, and a wide area map centered on the detailed map area displayed on the main screen is displayed on the sub-screen SDP and displayed on the main screen MDP. The approximate position of the detailed map image to be displayed can be easily grasped on the wide area map displayed on the sub screen.

FIG. 2 is an explanatory diagram showing the relationship between the map data and the display areas of the main screen and the sub screen. In the figure, MP is map data divided for each predetermined size, MDA is a detailed map area displayed on the main screen MDP, and SDP is a wide area map area displayed on the sub screen SDP.

At present, as shown in FIG. 2A, the area of the wide area map displayed on the sub-screen is made up of nine areas of 3 × 3 and the center area thereof is displayed on the main screen. It is assumed to be an area. Here, when the user inputs the direction key of the remote controller in the upper left direction, as shown in FIG. 2B, a wide area map area SDA displayed on the sub screen and a detailed map area MDA displayed on the main screen
Is moved from the previously selected area to an area adjacent to the designated direction (here, the upper left direction), and a map area SDA displayed on the newly selected sub screen and a map area MDA displayed on the main screen are moved. Based on the map data, a detailed map of the area MDA is displayed on the main screen, and a wide area map of the area SDA is displayed on the sub-screen.

With this configuration, the wide-area map and the detailed map of the central area of the area obtained by dividing the wide-area map into a plurality of areas can be displayed at the same time. A map of an adjacent area can be designated based on a direction from the center of the plurality of areas above, and the map area displayed on the main screen can be changed in area units.

Also, map data of a plurality of areas is read in advance, a wide area map is displayed on the sub screen using map data of a predetermined number of areas, and a change of the area of the detailed map displayed on the main screen is displayed on the main screen. It is also possible to display a detailed map based on the map data of one area of the screen.

FIG. 3 is a configuration diagram of the navigation device in the first embodiment. In FIG. 1, reference numeral 11 denotes a CD-ROM storing map information, 12 denotes a CD-ROM control unit for controlling reading of map information from the CD-ROM, and 13 denotes a position measuring device for measuring the current position of the vehicle. 14 is C
Map information memory for storing map information read from the D-ROM, 15 for a guidance route memory for storing set guidance routes, 16 for a control unit for controlling the entire apparatus, and 17 for generating a map to be displayed on the main screen A first display controller 18 is a first video RAM for storing a map image generated by the first display controller 17, 19 is a second display controller for generating a map to be displayed on a sub-screen, and 20 is a second display controller 19
Video RAM 21 for storing the map image generated in
Denotes an image synthesizing unit for synthesizing and outputting various images; 22, a display unit for displaying a map image output from the image synthesizing unit;
Denotes an operation unit, and 24 denotes a bus. Although not shown in addition to the above, the vehicle position mark generation unit, the menu image generation unit,
There is an intersection image generation unit and the like, and the images generated by the intersection image generation units are input to the image synthesis unit 21, where the images are appropriately synthesized and output.

The map stored in the CD-ROM 11 is divided into appropriate longitude and latitude widths according to the scale level such as 1/12500, 1/25000, 1/50000, 1/100000, etc. The roads and the like are stored as a coordinate set of vertices (nodes) represented by longitude and latitude. A road is formed by connecting two or more nodes, and a portion connecting the two nodes is called a link. The map data includes (1) a road layer including a road list, a node table, and an intersection configuration node list, and (2) a background layer for displaying roads, buildings, facilities, parks, rivers, and the like on a map screen. (3) Character / symbol layers for displaying characters such as administrative division names such as municipal names, road names, intersection names, and building names, and map symbols.

The map data stored in the CD-ROM 11 is stored in a predetermined area.
The CD-ROM controller 12 according to the instruction of the controller 16
Reads map data of a predetermined area from the CD-ROM 11. A wide area map image is generated by reading map data of a plurality of areas, or a detailed map image is generated based on map data of one area.

The position measuring device 13 includes a relative azimuth sensor 13a such as a vibrating gyroscope for detecting the rotation angle of the vehicle, a distance sensor 13b for generating one pulse every predetermined traveling distance,
It comprises a GPS receiver 13c, a position calculation CPU (not shown), and the like. The GPS receiver 13c receives data indicating the current date and time together with the position information sent from the GPS satellite.

The map information memory 14 includes a CD-ROM 11
And the map information, such as the map data and the candidate location information read from the storage device. The guidance route memory 15 stores the guidance route to the set destination.

The control unit 16 controls the entire navigation device. The control unit 16 controls the CD-ROM control unit 12 to read map data of an area around the vehicle from the CD-ROM 11 and read the map data read into the map information memory 14. Store information. Then, based on the map information stored in the map information memory 14, the first display controller 1
7 generates a detailed map image around the own vehicle position and stores the map image in the first video RAM 18, and the second display controller 19 generates a wide area map image based on the map information of a plurality of areas stored in the map information memory. Generated and stored in the second video RAM 20. In addition, the control unit 16 searches for an optimal route to the destination and stores it in the guidance route memory 15 as a guidance route, or based on the guidance route information stored in the guidance route memory 15, generates a guidance route on the map. The color is changed so that the road is displayed thicker than other roads, an arrow is displayed at an intersection to be turned based on the guidance route information stored in the guidance route memory 15, the current position information input from the position measurement device 13 and the guidance are provided. Based on the guidance route information stored in the route memory 15, voice guidance is performed when a certain distance from the intersection to be turned is approached.

The image synthesizing section 21 includes a first video RAM 18
And the wide-area map image stored in the second video RAM 20 are output to the display unit 22. The display unit 22 displays the detailed map on the main screen and the wide-area map on the sub-screen, respectively. indicate.

The operation section 23 is for inputting a user's instruction, and is used for switching the map scale, scrolling the map, switching the map area displayed on the display screen,
A destination setting operation and the like are performed.

FIG. 4 is an operation flow when the map display area is switched in the first embodiment. First, the control unit 16 controls the CD-R
The OM control unit 12 is controlled to read out the map data of a plurality of areas including the current position from the CD-ROM 11 and store it in the map information memory 14 (step S101). The first display controller 17 performs details based on the read map data. A map image is generated and stored in the first video RAM 18 (Step S102).

Next, the second display controller 19
Generates a wide area map image based on the map data of a plurality of areas read into the map information memory 14, and generates a second video RA
It is stored in M20 (step S103).

Then, the image synthesizing section 21 outputs the first video R
The detailed map image input from the AM 18 is displayed on the main screen of the display device, the wide area map image input from the second video RAM 20 is displayed on the sub-screen of the display device, and the vehicle position mark and the like are displayed in an overlapping manner (step). S104).

The control section 16 determines whether or not the user has operated the direction key of the operation section 22 (step S10).
5) If the user has not operated the direction instruction key, the process directly exits.

In step S105, when the user operates the direction key, the control unit 16 stores the map data of the area adjacent to the center area of the plurality of areas displayed on the sub-screen from the CD-ROM 11. Then, the first display controller 17 generates a detailed map image and stores it in the first video RAM 18 (step S106).

Next, the control unit 16 stores the map data of a plurality of areas centering on the area to be displayed on the sub-screen on a CD-ROM.
11 and the second display controller 19
Generates a wide area map image based on the read map data of a plurality of areas and stores it in the second video RAM (step S107).

The image synthesizing section 21 includes a first video RAM 18
Is displayed on the main screen of the display device, and the wide-area map image input from the second video RAM 20 is displayed on the sub-screen of the display device (step S108).

With the above arrangement, a detailed map is displayed on the main screen of the display unit, a wide-area map is displayed on the sub-screen, and the center is displayed in accordance with a direction instruction from the center of the plurality of areas displayed on the sub-screen. A detailed map of an area adjacent to the area can be displayed on the main screen, and a wide area map centered on an area newly displayed on the main screen can be displayed on the sub screen.

In the manner described above, the detailed map and the wide area map are simultaneously displayed on the display screen, and it is easy to determine which area of the detailed map displayed on the main screen is the area of the wide area map displayed on the sub screen. It is possible to know, and when changing the detailed map area displayed on the main screen, it is possible to easily select from a plurality of areas displayed on the sub screen.

(B) Second Embodiment FIG. 5 is a schematic explanatory view of a second embodiment. A wide area map is displayed on the sub-screen based on the map data of a plurality of areas. The wide area map displayed on the sub-screen is divided into a plurality of areas, each of which is given an area name. For example, FIG.
In (a), the sub-screen is divided into nine areas, and each area is given a display area name of A1 to C3.

The wide area map currently displayed on the sub screen is shown in FIG.
It is assumed that the message is displayed as shown in FIG. At this time, a detailed map based on the map data of the area B2 is displayed on the main screen.

When the user changes the detailed map currently displayed on the main screen from the area B2 to the area A1, when the user inputs "A1" by voice using the voice input means, FIG.
As shown in (b), a wide area map is displayed based on the map data of an adjacent area around the map data of the area A1 from the map data of the plurality of areas.

FIG. 6 is a block diagram of a main part of the navigation apparatus according to the second embodiment. Reference numeral 11 denotes a CD-R storing map information.
OM, 12 is a CD-ROM control unit that controls reading of map information from a CD-ROM, 13 is a position measuring device that measures the current position of the vehicle, 14 is map information that stores map information read from the CD-ROM. A memory, 15 is a guidance route memory for storing a set guidance route, 16 ′ is a control unit for controlling the entire apparatus, 17 is a first display controller for generating a map to be displayed on the main screen, and 18 is a first display controller. A first video RAM for storing the generated map image; 19, a second display controller for generating a wide area map to be displayed on the sub-screen; 20, a second video RAM, for storing a map image generated by the second display controller; An image synthesizing unit 22 for synthesizing and outputting various images; a display unit 22 for displaying a map image or the like input from the image synthesizing unit 21 Display unit 25, a voice recognition unit 2,
6 is a microphone.

CD-ROM 11, CD-ROM control unit 1
2. Position measurement device 13, map information memory 14, guidance route memory 15, first display controller 17, first
Video RAM 18, second display controller 1
9, second video RAM 20, image synthesizing section 21, display section 2
2. The operation unit 23 is the same as that described in the first embodiment.

The voice input by the microphone 26 is recognized by the voice recognition unit 25, and an input instruction is transmitted to the control unit 16 '. The control unit 16 ′ responds to the area instruction input from the voice recognition unit 25, and stores the map area of the area name assigned on the sub-screen in C
The data is read from the D-ROM 11 and stored in the map information memory 14. The first display controller 17 generates a detailed map based on the map data of the designated area and generates a first map.
Stored in the video RAM 18, the control unit 16 'reads a map of a plurality of areas around the designated area, and the second display controller 19 generates a wide area map image based on the read map data of the plurality of areas. Generated and stored in the second video RAM 20. The image synthesizing unit 21 displays the detailed map image and the wide area map image stored in the first video RAM 18 and the second video RAM 20 on the main screen of the display unit 22,
Display each on the sub screen.

FIG. 7 is a diagram showing a map display operation flow of the second embodiment. First, the control unit 16 ′ controls the CD-ROM control unit 12 to read map data of a plurality of areas centered on the area including the current position from the CD-ROM 11, and controls the display controller 17 to display the display device 19. The detailed map is displayed on the main screen and the wide area map is displayed on the sub-screen (step S201).

Next, the control unit 16 controls the microphone 25
, It is determined whether or not a region name has been input to the voice input device 24 (step S202). If no voice input has been made, the process of step S202 is repeated until a voice is input.

If there is an area name input in step S202, the voice input device 24 sends the input area name to the control unit 1
6 ', and the control unit 16' controls the CD-ROM control unit 12 to transmit the map data corresponding to the input area to the CD-ROM.
Reading from the ROM 11, the first display controller 17 generates a detailed map image based on the read map data, and writes it to the first video RAM 18 (step S203).

Then, the control unit 16 'transmits the map data of a plurality of areas including the area for generating the detailed map image to the CD-R.
The second display controller 19 controls the OM control unit 12 to read out from the CD-ROM 11, generates a wide-area map image based on the read-out map data of a plurality of areas, and writes it to the second video RAM 20 (step S20).
4).

The image synthesizing section 21 includes a first video RAM 18
Then, the detailed map image and the wide area map image written in the second video RAM 20 are displayed on the main screen and the sub screen of the display device 22, respectively (step S205).

In the manner described above, from the area divided into a plurality of areas to be displayed on the sub screen, the area name of the area to be newly displayed on the main screen can be input by voice so that the main screen can be easily displayed. Can be changed, and the positional relationship between the area before the change and the area after the change can be displayed in an easily understandable manner.

As described above, the detailed map is displayed on the main screen and the wide area map is displayed on the sub screen. When the detailed map display area of the main screen is changed, the wide area map divided into a plurality of parts on the sub screen is displayed. By selecting one of the areas by voice, the detailed map display area on the main screen can be easily changed.

In the above description of the embodiment, the wide area map displayed on the sub-screen is divided into nine parts. However, the display area of the sub-screen is divided into other numbers and displayed. A detailed map of the selected area may be displayed on the main screen.

The present invention has been described with reference to the embodiments.
The present invention can be variously modified in accordance with the gist of the present invention described in the claims, and the present invention does not exclude these.

[0050]

As described above, according to the present invention, a detailed map is displayed on the main screen, and a wide-area map is displayed on the sub-screen based on map data of a plurality of areas centered on the map area displayed on the main screen. The detailed map of the adjacent area is newly displayed on the main screen based on the direction indication from the center area of the wide area map displayed on the sub screen, so the position of the display area before change and the display area after change The map display area can be changed while easily grasping the relationship.

Further, according to the present invention, display area names are assigned to a plurality of display areas on the sub-screen, a display area on the sub-screen is specified by voice input, and a map area of the specified area is newly added to the main area. Since the detailed map display area of the screen is used, the map display area can be easily changed even during driving, and a map of a desired area can be displayed.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram of a first embodiment.

FIG. 2 is an explanatory diagram showing a relationship between map data, a main screen, and a sub screen.

FIG. 3 is a diagram illustrating a configuration of a navigation device according to the first embodiment.

FIG. 4 is a diagram showing an operation flow of the first embodiment.

FIG. 5 is a schematic explanatory diagram of a second embodiment.

FIG. 6 is a diagram illustrating a configuration of a navigation device according to a second embodiment.

FIG. 7 is a diagram showing an operation flow of the second embodiment.

[Explanation of symbols]

 MDP: Main screen SDP: Sub screen CR: Cursor

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09B 29/10 G09B 29/10 A

Claims (2)

[Claims] 1. A map display method for a navigation device for displaying a detailed map and a wide area map on a main screen and a sub screen of a display screen, respectively, wherein the wide area map displayed on the sub screen is divided into a plurality of areas, In addition to displaying the detailed map corresponding to on the main screen, and changing the detailed map display area on the main screen, the area to be changed from the area corresponding to the detailed map display area on the main screen on the wide area map displayed on the sub screen An input means for inputting the direction to the sub screen is provided, and a detailed map of an area adjacent to the input direction from the center area of the sub screen is newly displayed on the main screen, and the detailed map area displayed on the main screen is centered. A map display method for a navigation device, comprising displaying a wide area map on a sub-screen. 2. A map display method of a navigation device for displaying a detailed map and a wide-area map on a main screen and a sub-screen of a display screen, respectively, wherein the sub-screen is divided into a plurality of areas and each area is given a name. In addition, voice input means for inputting the area name is provided, and a detailed map corresponding to the area name input by the voice input means is displayed on the main screen, and a detailed map area displayed on the main screen is displayed. A map display method for a navigation device, characterized by displaying a wide area map centered on a sub-screen.