JP3461047B2 - In-vehicle navigation device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation device.
In particular, it is often difficult to search for and enter a destination in a short time.
Coming in-vehicle navigation device. 2. Description of the Related Art A vehicle is guided to travel and a driver
In-vehicle navigation that makes it easy to reach your destination
Equipment. In this car navigation system
Detects the position of the vehicle and reads the vehicle position from the CD-ROM.
Read map data of side and draw map image on V-RAM
And a vehicle position marker at a predetermined location on the map image.
Draws the image on top of each other and converts the V-RAM image into a video signal
Output to CRT display device and display on screen
I do. Then, as the current position changes as the vehicle moves,
Move the vehicle position mark on the screen, or
Placement mark is fixed in the center of the screen to scroll the map
And you can always see the map information around the vehicle position at a glance
Swelling. [0003] The map data stored in the CD-ROM is
For example, for all areas such as Japan, multiple scales
And the map at the maximum scale as shown in FIG.
(Hierarchy level 0) is one map of all areas (see L0
Map), the map one scale down (hierarchy level 1) is the hierarchy level
The map area 0 is divided vertically and horizontally equally into multiple pieces (vertical and horizontal
4 maps, 16 maps when divided vertically and horizontally into 4)
(Refer to L1-1 to L1-4), the map is one scale down
(Hierarchy level 2) is the map area of the next higher hierarchy level 1.
For each a, the map area is divided into a plurality of pieces (vertical and horizontal 2
4 when divided, 16 when divided vertically and horizontally)
Map (see L2-1 to L2-16)
The area is divided into a plurality of hierarchical levels 0, 1, 2 according to the scale of the scale.
.. divided into exponential functions each time the hierarchical level goes down
It is divided into a number of maps. However, any scale
One map also corresponds to one screen. [0004] The map stored in the CD-ROM is
A land of appropriate longitude and latitude width depending on the scale level
The road is represented by longitude and latitude coordinates.
It is indicated by a set of vertices (nodes). Two or more nodes
The part connecting is called a link. Included in each map
As shown in FIG. 9, the road data is road link data RL.
DT, node data NDDT, intersection data CRDT
Road link data RLDT
Is concerned with the road link data,
Data representing the type of road, such as other roads,
The total number of nodes and node data of each node that constitutes the link
Data indicating the number of NDDTs and the width of the road between nodes
Etc. Width data of the n-th node number
The node associated with the n-th node number and the (n + 1) -th node
Displays the width of the road (link) connecting the nodes related to the node number
You. The intersection data CRDT is provided for each intersection on the map.
The nearest node to the intersection on the link connected to the intersection
Node data NDD of the node (referred to as an intersection configuration node)
A set of numbers on T, and the node data NDDT is a map
This is a list of all the nodes above, and the coordinate information (through
Degree, latitude), intersection knowledge of whether the node is an intersection
Another flag, if it is an intersection, point to the intersection data,
Otherwise, a pointer to the road link to which the node belongs
And so on. [0005] By the way, according to the vehicle-mounted navigation device,
When performing route guidance and route search, drive before driving.
Input the departure place, main route point, destination, etc. into the device.
Need to be At this time, the map data on the CD-ROM is
At the lowest hierarchical level, map data includes city roads, private roads, etc.
Data is included, but as you move up one level
City roads and private roads are omitted due to the screen resolution.
Or prefectural roads are omitted, and data of low importance
It has been thinned out. Therefore, conventionally, the departure point, the main route point,
When entering a destination, etc., the lowest floor different from the desired area
When displaying the layer level map, the reduction key on the operation unit
Press a predetermined number of times to display the map at a higher hierarchical level first.
(In this case, it corresponds to the vehicle position on the map on the screen.
A predetermined cursor appears at the position). In this state,
Key to move the cursor on the screen,
Adjust to the vicinity. Next, the user presses the enlargement key of the operation unit once,
Switches the map on the screen to the next lower level (ie,
After magnifying the map near the place where the sol was combined)
Use the cursor keys to move the cursor on the screen
Adjust to the vicinity of the desired location. Again, the desired place
If it is not clear, press the magnifying key on the operation unit again
Switch the map on the screen to a lower hierarchical level (immediately
Search the desired point to be entered.
I do. However, in such a system, the screen
Searching when switching to a lower hierarchical level in the map of
May enlarge the area near another point
Yes, in this case, operate the cursor keys again to
The map can be enlarged or reduced by operating the reduction key.
It takes time to position the cursor near the desired location
It is difficult to map the lower hierarchical level including the desired location.
I can't reach it. In addition, the magnified screen (ground at the lower hierarchical level)
Search), the range displayed on the screen is narrow
So you don't know which part of the whole you're looking at,
Especially when the departure point and the destination are far apart,
Is the location relationship between the destination and the currently displayed map area.
It is very difficult to grasp the person in charge. Therefore, detection of a desired point
The problem is that it takes a lot of time to complete the search
there were. Accordingly, an object of the present invention is to detect a desired point.
In-vehicle navigation system that can search in a short time
Is to provide. [0010] The above object is achieved by the present invention.
Input the route from the departure point to the destination.
Navigation system that guides the vehicle along the route
In, move the cursor up, down,
Arrow keys to move left and right, and the cursor moves
And a detector for detecting whether the cursor is moving or not.
Display the reduced map on the display screen and when the cursor stops
as well as Map drawing control unit that displays an enlarged map when moving intermittently
It is achieved by having. According to the present invention, when searching for a destination or the like,
Activate the map drawing control and move the cursor to the map.
When moved in the opposite direction, the detection unit detects the movement of the cursor
The map drawing control unit displays the reduced map on the display screen.
The layout of the entire route including the starting point and destination
Becomes clear. Therefore, cursor near the area to be expanded
When the cursor is stopped or moved intermittently,
The detection unit detects the non-movement of the cursor, and the map drawing control unit
The enlarged map is displayed on the display screen.
Details in a given area on the map indicated by the
Road data becomes clear. Therefore, navigation equipment
Search and input of destination, etc.
It can be done in a short time without any operation. FIG. 1 shows a vehicle navigation system according to an embodiment of the present invention.
FIG. 3 is an overall configuration diagram of an application device. In FIG. 1, reference numeral 1 denotes a map data storage means.
CD-ROM, 2 is an operation panel, and a cursor is displayed on a map.
Arrow keys to move up, down, left, and right relative to
-2a, route main point setting key, destination setting key, route
Guidance mode setting key, start key, map search, enlargement /
A key for reduction is provided. 3 is an azimuth sensor and a distance sensor.
Position and direction of a running vehicle by integral navigation.
And outputs vehicle position data and vehicle direction data
The vehicle position detection unit 4 is a CRT display device,
Map, cursor mark, vehicle position mark, highlight
Display the route and so on. Reference numeral 10 denotes a navigation controller.
Control of map reading and optimal guidance route to destination
Search processing, map drawing processing, and the like. In the map drawing process
Is the map image around the vehicle position, cursor mark, vehicle position
Generating placement marks, emphasized guidance routes, intersection guidance images, etc.
Perform drawing processing. In the navigation controller 10
11 is the map data read from the CD-ROM 1.
Buffer memory for temporary storage, 12 is the cursor position
It is a calculation unit, and the cursor is operated by the arrow keys etc. of the operation panel 2.
The longitude corresponding to the center of the map on the screen when the operation was performed
And calculate the latitude and output it as the cursor position. In addition,
The cursor is fixedly displayed at the center of the screen. Reference numeral 13 denotes a map drawing control unit, which is used before starting driving.
In the above, the desired map selected by the map search operation of the operation panel 2
Read map data from CD-ROM to buffer memory 11
And generate a map image in the V-RAM described later.
Or store, or move, stop or pause the cursor
New map data as needed according to the intermittent movement operation
-While reading from the ROM 1 to the buffer memory 11,
So that the cursor position is at the center
Scroll the image and display the map image in V-RAM
Rewrite as appropriate. Note that the map drawing control unit 13
When moving the cursor (cursor movement operation), display the reduced map.
Displayed on the play screen, when the cursor stops or moves intermittently
Displays an enlarged map. The map drawing control unit 13
Is the vehicle position input from the vehicle position detector 3 during traveling
As the data and heading data change,
Buffer memo from CD-ROM1
So that the vehicle position is always at the center while reading to
Rewrites the map image in the V-RAM and
Vehicle position marker in the center in the direction indicated by vehicle direction data
Draw the mark. Reference numeral 14 denotes a route main point setting unit, which is an operation panel.
2 is set to the route guidance mode, and the operation panel 2 is operated to display the screen.
Center cursor mark coincides with main route point including departure point
Key is pressed after the key is pressed,
The output of the cursor position calculator 12 at the time of
Set as point data (that is, route main point data
Are the major points you want to pass before reaching your destination
Data representing each location of
Is). Also, the cursor in the center of the screen can be
After the mark matches the destination, press the destination setting key.
When the cursor is pressed, the current position of the cursor position calculator 12 is output.
Set force as destination data. Reference numeral 15 denotes a guidance route search unit, which is a route guidance mode.
The main route point and the destination are set under the mode
And route principal point data from the route principal point setting unit 14
Read the destination data. After that, these data and
Next to the first route main point (departure point) using map data
Nodes constituting the shortest route between major points of the second route in contact
Ask for. Then, from the second route main point,
For the nodes that make up the shortest route between the main routes
You. Thereafter, in the same way, the shortest guidance from the departure point to the destination
Find the nodes that make up the route, and check each node (departure point, destination
Location data (longitude, latitude)
Remember. A guidance route 16 stores guidance route data.
A node which is a memory and is obtained by the guidance route searching unit 15
The column is, for example, 16 except for the departure point data and the destination data.
^Three -When there are two nodes, as shown on the left side of FIG.
And the address F000 of the first storage area _H Departure day to
Address F001 _H ~ FFFE _H In the
Dress F001 _H No. closest to the departure point on the guidance route
Address F002 _H Second on departure point on guidance route
Nodes are stored in order.
It is. And the last address FFFF _H Destination to
Data is stored. Reference numeral 17 denotes a guidance route drawing control unit, which guides a route.
While traveling in the guidance mode, the guidance stored in the guidance route memory 16 is used.
Currently drawn from V-RAM
Enter guidance route data that falls within the range of the map image
Draw a guidance route that is emphasized in a different color from other roads
You. When drawing the guidance route, the guidance route drawing control unit 17
Each adjacent node that constitutes the guidance route (here,
Between the main road and the destination are also treated as nodes)
And draw a link, but furthermore, two adjacent nodes
Of the address in the guidance route memory 16 with respect to the
From the destination node is determined from the two adjacent nodes
At the midpoint of, draw an arrow pointing toward the node near the destination,
Indicates the destination direction on the guidance route. Reference numeral 18 denotes a V-RAM, which is a map drawing control unit.
13 and the guidance route drawing control unit 17
Has directivity generated by superimposing on a map image with
The navigation route image is stored. 19 is from V-RAM18
The output image data is converted to video signals and
It is a video converter that outputs to the spray device 4. 20 is operation
The cursor is moved to the map on the screen by operating the arrow keys on the board 2
Cursor that detects whether it is moving relative to
It is a movement detection unit. FIGS. 3 and 4 show a navigation controller.
FIG. 5 is a flow chart showing the operation of the
FIG. 6 is an explanatory diagram showing an overall view of a road, and FIG. 6 is a display control according to the present invention.
, The map expansion of the navigation controller 10
FIG. 7 is an explanatory view showing the principle of large and small scales, and FIG. 7 shows a screen display example.
It is an explanatory view, and the description will be made with reference to these figures. First, a map search of the operation panel 2 for enlargement / reduction
Select map of desired area at desired scale by operating keys
When the operation is performed, the map drawing control unit 13 determines whether the CD-ROM 1
When the desired map data is read out to the buffer memory 11,
In both cases, a map image is generated based on the map data and V-
It is stored in the RAM 18. The location stored in the V-RAM 18
The figure image is converted to a video signal by the video
Output to the display device 4. CRT display
The device 4 displays a map on a screen based on the input video signal.
(Steps 101 and 102 in FIG. 3). Next, the operation panel
When the route guidance mode setting operation is performed in Step 2, the navigation
The location controller 10 sets the route guidance mode (
Steps 103 and 104). In this state, the arrow keys on the operation panel 2 are operated.
When the cursor mark is moved, the cursor movement detecting section 20 moves the cursor mark.
Movement is detected, and the cursor movement operation using the arrow keys continues.
Determine whether the operation is an intermittent operation or an intermittent operation.
(Hold down the arrow key)
Output a predetermined signal indicating the continuous movement of the cursor mark
(Steps 105 and 106). This allows you to draw a map
Image control unit 13 corresponds to the cursor position from CD-ROM1
Map (the map with a higher hierarchical level)
Generate a reduced map image while reading it into the buffer memory 11.
And stores it in the V-RAM 18. Draw on V-RAM18
The drawn map image is converted into a video signal by the video conversion unit 19.
Output to the CRT display device 4, and the CRT display
The spray device 4 displays a map image on a screen based on the video signal.
(Step 107). As a result, the continuous cursor
During operation, the screen of the CRT display device 4 is displayed on the left side of FIG.
As shown in the figure, the area including the point corresponding to the cursor position
A reduced map image corresponding to a local area is displayed. still,
The cursor mark is drawn at the center of the screen. Therefore, the cursor mark is placed on the reduced map image.
Continuously to the vicinity of the point that should be set as the main route point
And move it in a short time (actually the map scrolls
Thought that the cursor mark was approaching the main route point
The cursor mark is stopped at the point
Pressure is stopped) or intermittent movement (arrow key intermittently)
(Pressing state), the cursor movement detection unit 20
Stop outputting the signal indicating the continuous movement of the cursor described in
You. At this time, the map drawing control unit 13 stops the cursor mark.
The CD-ROM 1 is assumed to be stationary or intermittently moving.
To an enlarged map (hierarchy) including the point corresponding to the cursor position
The lower level map) to the buffer memory 11
While generating an enlarged map image and storing it in the V-RAM 18
You. The map image stored in the V-RAM 18 is a video conversion unit.
The video signal is converted into a video signal at 19 and the CRT display device 4
Output to the CRT display device 4
A map image is displayed on the screen based on the image (step 108).
The cursor mark is drawn at the center of the screen. As a result,
The CRT display is installed when the
As shown in the right part of FIG.
The enlarged map image showing the narrow range of
Displayed with detailed road data. So the cursor
Mark should be set by moving the mark intermittently on the enlarged map image
The main route point is set, but the CRT display device 4
The image above is automatically switched to the enlarged map image
With this, the route main point can be set accurately. Follow
Without having to operate the keys for map search and zoom in / out
The map on the screen using only the arrow keys.
It can be easily scaled up or down, resulting in a short
Makes it possible to search for a desired point. The cursor mark is continuous with the map.
When moving or intermittently moving, the cursor position calculator 12
Calculates the cursor position (longitude and latitude coordinates) (step
109), the map drawing control unit 13 changes the cursor position.
And scroll the map according to
A predetermined map data from the ROM 1 is stored in a buffer memory 11;
Generate new map image while reading to V-RAM
18 is stored. As a result, the cursor marker appears in the center of the screen.
When the screen is displayed, the map on the screen
Scroll (steps 110 and 111). The cursor mark on the screen comes to the main route point.
Then, temporarily stop the cursor operation and move
When the key point setting key is pressed, the route key point setting section 1
4 is output from the cursor position calculator 12 at that time.
Cursor position data as main route data
Regular registration is performed (steps 112 and 113). This implementation
In the example, the starting point is set as the first route main point
As a result, the first route main point data
Is the departure place data. Thus, the cursor operation must be performed again
When the cursor moves continuously, a reduced map is displayed
-Display an enlarged map when the sol stops or when it moves intermittently.
Scroll the map on the screen and
When Lemark reaches the next main route point,
Set key route points using keys. Such behavior
From the point of departure to the point of destination
Set the main point of the route, then the cursor mark
When you reach the ground, stop the cursor operation again and operate
Pressing the destination setting key on panel 2 sets the main route point
The section 14 outputs from the cursor position calculating section 12 at that time.
The current cursor position data as a destination
(Step 114). This is the starting point on the map
It is assumed that the relationship between the destination and the destination is as shown in FIG. The main route point including the departure point in this way
After setting and registration of data and destination data,
Step 114 is YES, and the guidance route searching unit 15
CD-RO based on road main point data and destination data
Buffer map data from departure point to destination from M1
Optimal invitation between main points of each route while reading out to memory 11
Search for a guidance route and find the optimal guidance route from the starting point to the destination
Is stored in the route memory 16
(Step 201 in FIG. 4). At this time, guidance
Each node data stored in the route memory 16 includes longitude,
Contains latitude coordinates. Next, the start key is pressed on the operation panel 2.
First, the map drawing control unit 13 sets the route main point.
Input the departure place data from the section 14 and obtain the map data around the departure place.
Data from CD-ROM 1 to buffer memory 11
V-RAM so that the center coincides with the departure point
18 (steps 202 and 20).
3). Subsequently, the guidance route drawing control unit 17 controls the route
Enter the departure point data from the key point setting unit 14 and enter the guidance route
From the memory 16 around the departure point, a V-RAM 18 map drawing
Read the nodes (including the departure place) in the image area
Then, superimposed on the map image of V-RAM18,
Draw a thick and directional guidance route with different colors (s
Step 204). Specifically, it constitutes a guidance route
Each adjacent node (here, the departure point and destination are both nodes
Draw a link by connecting straight lines between
In addition, the guidance route memory 16
Determines the node closer to the destination based on the size of the address within
And a node near the destination at the midpoint between two adjacent nodes
Draw an arrow pointing toward and point to the destination direction on the guidance route.
Show. Next, the map drawing control unit 13 determines the vehicle position.
Vehicle orientation data is input from the detection unit 3 and the V-RAM 1
8 shows the vehicle direction data in the center of the map generated and stored
Draw a vehicle position mark in the direction
05). Map images and cars stored in the V-RAM 18
Both marks are converted into predetermined video signals by the video conversion unit 19.
While being output to the CRT display device 4 and displayed on the screen.
Is shown. As a result, the vehicle position is centered on the screen.
The map image around the vehicle position is
It is displayed together with the directional emphasis guidance route. Normal
First, the vehicle position mark on the screen as shown in FIG.
The CM is displayed at the place of departure and the emphasis displayed on the screen
The guidance route PT indicates the destination direction of the guidance route with an arrow R.
Is done. When the vehicle starts traveling, the vehicle position detecting section 3
The route main point data set by the route main point setting unit 14
The vehicle travels a certain distance starting from the data (departure point)
The vehicle position and direction are detected by integral navigation every time,
Outputs position data and vehicle direction data to the map drawing control unit 13.
Control and drawing vehicle position data
17 is output. Vehicle position data from the vehicle position detector 3
And the vehicle direction data, the map drawing control unit 13
While scrolling the map image, the vehicle position
Peripheral map data from CD-ROM1 to buffer memory
11 and read the map image (enlarged map image in this case)
Is generated and stored in the V-RAM 18 (step 20).
6, 207). Subsequently, the guidance route drawing control unit 17
From the guide path memory 16 around the vehicle position, the V-RAM 18
Superimposed on a map image of a different direction and thicker than other roads
A guidance route having a property is drawn (step 208). Next, the map drawing control unit 13 sets the vehicle direction
Center of map stored in V-RAM 18 based on data
The vehicle position mark with the direction indicated by the vehicle direction data
Drawing is performed (step 209). This allows the map on the screen
The image shows a fixed distance with the vehicle position fixed in the center
Scroll. Hereinafter, similarly, the vehicle
Each time you drive, you draw a map image around the vehicle position,
Of enhanced guidance routes with directivity around the vehicle
Repeat the drawing of the mark. As described above, the guidance route memory 16
Map image of the V-RAM 18 around the vehicle position
When the vehicle stops or moves intermittently, the map is enlarged.)
Overlap and draw with a different direction from other roads with thick and directivity
While checking the drawn guidance route on the screen,
Driving along the route allows the driver to
Easy to reach. Also, during traveling, the current vehicle position and departure
Location relative to the route, the main route point other than the departure point, the destination, etc.
Route guidance by operating the operation panel 2
Mode, point the cursor in the direction you want to search
To move continuously. Then, the image on the V-RAM 18
The image is again a reduced map, which results in a CRT display.
On the screen of the ray device 4, as shown in the left part of FIG.
A reduced map image showing a range area is displayed. Follow
Select the area to be reduced and perform the map reduction operation.
Even without it, a reduced map can be displayed. Further
In the same route guidance mode, stop the cursor or
Is the screen of the CRT device 4 in the same manner if it is moved intermittently.
Then, as shown in the right part of FIG.
You can display an enlarged map showing details around the point
You. At this time, the driver selects the area to be expanded and maps
There is no need to perform the enlargement operation. For this reason, even while driving,
Use the arrow keys on operation panel 2 to move the cursor continuously or
Can be stopped or moved intermittently, and other complicated operations can be performed.
Searching for a desired point in a short time without having to perform
Can be. As described above, according to the present invention, the output is
Enter the route from the departure point to the destination, and enter the
In-vehicle navigation system that guides vehicles along
And move the cursor up, down, left, or right relative to the map.
Arrow keys to move the cursor and whether the cursor is moving
Detector to detect whether or not, and reduced map when the cursor moves
Is displayed on the display screen and when the cursor is stopped. as well as Intermittent
Equipped with a map drawing control unit that displays an enlarged map when moving
Therefore, when searching for a destination, etc., move the cursor to the map.
And move the cursor relatively, the detection unit moves the cursor
Detected and reduced to display screen by map drawing control unit
A map is displayed, and the entire route including the departure point and destination
The arrangement becomes clear. This allows you to accurately include the desired point
Hover over the area to be expanded
Easy and accurate without key or key operation
It works. Move the cursor near the area to be enlarged.
When the cursor stops or moves intermittently, the detection unit
Detects that the cursor has not moved, and the map drawing control
Since the figure is displayed, it is displayed on the map indicated by the cursor.
Detailed road conditions in a given area of the
It is immediately clear without making. Therefore, the arrow keys
Just perform an operation, no need to perform other key operations
It is definitely easy to reduce and enlarge
Search and input of results and destinations can be done in a short time.
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall configuration diagram of a vehicle-mounted navigation device according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of data stored in a guidance route memory. FIG. 3 is a first diagram showing the operation of the navigation controller.
It is a flowchart of. FIG. 4 is a second diagram showing the operation of the navigation controller.
It is a flowchart of. FIG. 5 is an explanatory diagram showing an overall image of a road including a departure place and a destination. FIG. 6 is an explanatory diagram of display control according to the present invention. FIG. 7 is an explanatory diagram showing a screen display example of the CRT display device of FIG. 1; FIG. 8 is an explanatory diagram showing a hierarchical structure of a map stored in a CD-ROM. FIG. 9 is an explanatory diagram showing a configuration of road data in map data. [Description of Signs] 2a Arrow Key 3 Vehicle Position Detection Unit 4 CRT Display Device 10 Navigation Controller 13 Map Drawing Control Unit 15 Guide Route Searching Unit 20 Cursor Movement Detection Unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G01C 21/00-21/36 G08G 1/0969 G09B 29/00-29/10 G06F 17/30 G06F 11 / 60

Claims (1)

(57) [Claim 1] In an in-vehicle navigation device for inputting a route from a departure point to a destination and guiding a vehicle along the input route, a cursor is positioned relative to a map. Arrow keys for moving up, down, left, and right directions, a detection unit for detecting whether the cursor is moving, a reduced map is displayed on the display screen when the cursor moves, and when the cursor stops and intermittently moves An in-vehicle navigation device equipped with a map drawing control unit that sometimes displays an enlarged map.