JPH0763574A - Vehicle navigation system and display method of display screen thereof - Google Patents

Abstract

PURPOSE: To provide a vehicular navigation system that shows both the distance from the current position of a vehicle to a destination and direction simultaneously and a method for displaying the display screen thereof. CONSTITUTION: This vehicular navigation system includes a position detecting means 25 for detecting the position of a vehicle by receiving a signal from a GPS satellite, a storage means 26 in which map data is stored, a signal processing means 29 for outputting a road map and vehicle current position data on the road map by combining the map data with vehicle position information, and a display means 21 for displaying an output signal of the signal processing means 29. Means are provided for measuring the current position of the vehicle and by which a destination information cursor showing the direction of and distance to a destination with the current position set to a position cursor serving as the center is displayed on one of the screens of the display means 21 together with the position cursor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle navigation system for displaying the current position of a vehicle and the direction and distance of a destination on a road map, and a display screen display method thereof. More specifically, a vehicle navigation system that displays a position cursor that displays the position and direction of the vehicle and a destination information cursor that displays the direction and distance of the destination centered on this position cursor on the road map. The present invention relates to a system and a display method thereof.

[0002]

2. Description of the Related Art Generally, a vehicle navigation system simply displays the current position of the vehicle on a map on the screen, and allows the driver to know in what direction and how much distance to reach the destination. It was inconvenient because I could not. Therefore, a navigation system will be introduced in which the road having the shortest distance from the current position of the vehicle to the destination is selected and displayed on the road map (JP-A-4-319619). Shown in.

That is, such a conventional vehicle navigation system includes a display device 1 for displaying a current position of a vehicle, a destination and a route to the destination on a road map, a destination designation, a route search and a route extraction. An operation device 2 that specifies conditions, a storage device 3 that stores information (all road networks) that is a condition for route search and route extraction, and an operation that calculates information that is a condition for route search and route extraction Device 4
And a route search control device 5 for controlling route search and route extraction based on destination coordinates and route search designated by the operation device 2 and route extraction condition designation, and stored in the storage device 3. The data stored in the storage device 3 and the data output from the arithmetic device 4 are read through the selection device 6, and the data stored in the storage device 3 and the data output from the arithmetic device 4 are read. A route search device 7 that searches for a combination of all road segments or a combination of all highway segments that reach the destination from the current position based on the above, and data stored in the storage device 3 and output from the computing device 4. The selected data is read out through the selecting device 6, and based on the data, all road sections corresponding to the optimum route between the current position of the vehicle and the destination are selected. The route extraction device 8 for extracting the combination of the ment or the combination of the highway segments, the current position detection device 9 for detecting the estimated current position by calculating the integrated azimuth and integrated distance by traveling, and the optimum route and the estimated current position. An emphasis signal generation device 10 for generating a signal to be highlighted on the road network, and a signal for highlighting the shortest time route and the estimated current position on the road network to the display device 1 to guide the vehicle and each road. The guide device 11 stores the required time for the actual travel of the vehicle in the required time memory of the recording device 3.

The conventional vehicular navigation system thus constructed displays the road network on which the vehicle is traveling when there is no initial setting input and highlights the estimated current position, and when there is an initial setting input. Is for creating an optimum route to a destination, displaying the optimum route together with the road network and the estimated current position, and guiding the vehicle.

That is, when a driver specifies a destination and a route search and a route extraction condition, the route search control unit 5 searches the coordinate position of the current position and the destination and the route search and route extraction condition data. Determine the route search and route extraction method.

Then, in the route searching device 7, data corresponding to the periphery of the route from the current position of the vehicle to the destination is selected from the road network data in the storage device 3 through the selecting device 6 based on the designated method. Read out and search for a route set that reaches the destination.

For example, in the route search device 7, as shown in FIG.
As shown in, when the distance from the current position to the destination is long, the first section from the current position P1 of the vehicle to the interchange (IC) P2 closest to the current position of the vehicle,
It is divided into three sections, the second section from the interchange P2 closest to the current position of the vehicle to the interchange P3 closest to the destination, and the third section from the interchange P3 closest to the destination to the destination P4. Three
The search for the optimal route is performed simultaneously in one section.

Next, the route extraction device 8 uses the designated method to designate the destination as the designated traveling time, the required travel time of each road segment of the segment (month, day of the week, time zone), the waiting time for a right turn, Data for route extraction, such as signal waiting time, is read from the all-road time required memory, the highway required time memory, the signal waiting time memory, and the right turn number calculation device in the storage device 3 and the arithmetic device 4 to read each road segment. The optimum travel route to the destination is selected by adding up the required travel times and comparing the conditions for route extraction of the required time of each route set.

Then, the emphasized signal generating device 10 generates a signal for highlighting the selected optimum route, and the guiding device 11 supplies the display device 1 with a signal for highlighting the optimum route to display device 1. The optimal route to the driver's destination is highlighted above.

[0010]

However, in such a conventional vehicle navigation system, the optimum route is selected in consideration of the number of right turns to the destination and the signal waiting time, and the route is selected on the display device. I highlighted the route, but I couldn't know the distance to the destination because the distance to the destination was not displayed. Further, if the route to the destination displayed on the display device cannot be traveled during traveling, there is a problem that the destination must be set again during traveling.

On the other hand, as another type of vehicle navigation system for displaying information up to the destination, the current position of the vehicle and the information about the destination are not displayed on the road map on the screen so that the information for the destination is not displayed so that the information is displayed in several steps. Information about the destination by operation (for example, if you press the operation key on the screen showing the current position of the vehicle, a screen for setting the destination appears, and if you press the operation key again, information about the destination appears) There is a way to get to know.
In this case, the information for the destination is displayed in characters or numbers, such as 270 degrees direction, 15 km, etc., so the driver cannot easily know the destination, and the current position of the vehicle and the destination are displayed. Since information about the ground is not displayed on the same screen, it is impossible to obtain information about the destination at the same time as the current position.

Therefore, the present invention has been made to solve such a problem, and the current position of the vehicle is displayed in duplicate on the road map on the display screen, and the position cursor is fixed with respect to the displayed current position. (EN) A vehicle navigation system and a display screen display method for the same, in which a current position of a vehicle and the distance and direction to the destination can be known at the same time by graphically displaying a destination information cursor around the distance. To that end.

[0013]

In order to achieve such an object, a vehicle navigation system of the present invention comprises:
Position detecting means for receiving a signal from a GPS satellite through a GPS antenna to detect the position of the vehicle, storage means for storing map data, map data from the position detecting means and storage means, and vehicle position information. A road map, signal processing means for outputting the current traveling position data of the vehicle on the road map, and display means for displaying the output signal of the signal processing means to measure and measure the current position of the vehicle. A vehicle navigation system for displaying the present position of a vehicle on a road map with a position cursor, wherein the position cursor is centered on the road map displayed on the display means under the control of the signal processing device. A destination information cursor that displays the direction and distance of the destination is displayed on one screen together with the position cursor.

Further, the vehicle navigation display screen display method of the present invention uses a GPS antenna to provide a GPS.
Position detection means for receiving a signal from a satellite to detect the position of the vehicle, storage means for storing map data, map data from the position detection means and storage means and vehicle position information are combined. A road map, signal processing means for outputting current traveling position data of the vehicle on the road map, and display means for displaying an output signal of the signal processing means are provided, the current position of the vehicle is measured, and the measured vehicle's current position is measured. A vehicle navigation display method for displaying a current position on a road map with a position cursor, wherein a destination information cursor representing a distance and a direction of a destination centered on the position cursor is displayed on the displayed road map. The display is graphically displayed simultaneously with the position cursor.

[0015]

The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an overall system block diagram of the present invention, which comprises a map display screen 21A composed of a color liquid crystal display device (LCD) and an operation device 21B composed of a plurality of operation keys used for navigation. A display device 21, a graphic generation circuit 22 for generating a map graphic and a cursor as screen graphic data, a key scan circuit 23 for checking a key input from the operation device 21B, and a GPS.
(Global Positioning System) GP from antenna 24
GPS receiver 2 that processes the S signal and detects the position of the vehicle
5, a CD-ROM driver 27 for driving the map data stored in the CD-ROM 26, and the C
CD-ROM interface circuit 2 for reading map data from the D-ROM driver 27 and converting the data
8 and each of the means 21 to 28 to receive the data from the GPS receiver 25 to calculate the accurate current traveling position of the vehicle, and to input the key of the operation device 21B to the CD-ROM interface circuit. The signal processing device 29 receives the map data through the display 28 and displays it on the map screen 21A through the graphic generation circuit 22.

FIG. 2 shows an example of the display device 21, 21A is a map display screen.
The keys located on the left and right sides of 1A are various keys located on the operation device 21B, and are the GPS key 31 and the set key 3
2 and Zoom-in and Zoom-out (Z
(oom-out) keys 34 and 33, a map search key 35 for map search, a cursor frame key 36 for determining and moving the cursor frame direction, and a destination setting cursor 4
0 is provided on the screen and a map direction key 37 for moving the destination setting cursor 40, 38 is a position cursor of the own vehicle, and 39 is a destination information cursor.

The operation of the present invention thus constructed is shown in FIG.
A more detailed description will be given based on the flowchart of FIG.

First, power is supplied (a power supply device is not shown) for navigation of the graphic generation circuit 22, key scan circuit 23, GPS receiver 25, CD-ROM interface circuit 28, signal processing device 29, and the like. When the respective means for resetting are reset, the CPU of the signal processing device 29 initializes the circuits and memories of the respective parts (see step 110 in FIG. 3, hereinafter only step numbers will be displayed), and the key scan circuit 23 will be activated. Drive and Figure 2
A key scan is performed to detect inputs from the various operation keys 31 to 37 shown in (120).

At this time, if the input of the map search key 35 is sensed (130), the signal processing device 29 causes the CD-RO to operate.
The M driver 27 is driven to read the map data stored in the CD-ROM 26 through the CD-ROM interface circuit 28, and the map data is stored in the storage device in the signal processing device 29, and the data is generated as a graphic. Input to circuit 22 for processing into the map graphic displayed on the screen. Therefore, FIG.
As shown in (A), a map 41 and a grid 42 are displayed on the map display screen 21A (140).

Then, when it is detected that the cursor frame key 36 is pressed (150), the cursor frame key 36 is temporarily
If it is determined that is pressed, the cursor frame 43 is moved by the operation of the cursor frame key 36 as shown in FIG. 4A (160), and if it is determined that the cursor frame key 36 is not input, the above step ( Step) Return to 120.

After performing step 160, the process proceeds to step 170, the input of the zoom-in key 34 is sensed, and when it is determined that the zoom-in key 34 is pressed, a more detailed map than the currently displayed map is displayed. Display on screen 21A
(180). Then, it is determined whether the zoom-out key 33 is input (190), and if it is determined that the zoom-out key 33 is input, a map of a wider area than the currently displayed map is displayed (200), If it is determined that the zoom-in key 34 and the zoom-out key 33 are not input as a result of performing the steps 170 and 180, the process returns to step 120.

On the other hand, the meaning of displaying a detailed map or a wide area map on the map display screen 21A is as follows. Generally, when displaying a map in a navigation system, the map is displayed in a wide area or a detailed map is displayed. Here, a wide area map (level 1 map) is a map showing the whole country, a map at the next stage (level 2 map) is a map showing one region, and a map at the next stage. The map (level 3 map) is a map where one prefecture is displayed, and the next map (level 4 map) is a detailed map where all place names are displayed. Therefore, the level 4 maps are collected into a level 3 map, the level 3 maps are collected into a level 2 map, and the level 2 maps are collected into a level 1 map.

If a destination is set on the map retrieved through steps 120 to 200, the map direction key 3
7 is pressed, the input of the map direction key 37 is sensed (210), and if it is judged that the map direction key 37 is not input, the above-mentioned step 12
When it is returned to 0 and the map direction key 37 is input, the destination setting cursor 40 in FIG.
It is provided on A and the destination setting cursor 40 is moved and displayed according to the moving direction of the map direction key 37 (220).
In this way, search for the desired map and press the set key at the point where the destination setting cursor 40 is to be moved. The set key 32 is checked for input (230), and it is determined that the set key 32 has not been input. Then, the process returns to step 120, and when it is determined that the set key 32 is input, the destination setting cursor 40 displayed on the map display screen 21A.
The coordinate value of the position is stored in the memory (240), and the set destination 44 is displayed (250) as shown in FIG. 4 (B).

When the map search or the destination setting is completed in this way, the process returns to the step 120 to perform the step 120, and then the step 130 is performed to determine whether or not the map search key 35 is input. If it is determined that the map search key 35 has not been input at the stairs 130, the process proceeds to step 260 to check whether the GPS key 31 has been input.

If it is determined in step 260 that the GPS key 31 has not been input, the stairs 120 is restored and the GPS key 3 is pressed.
When it is determined that there is an input of 1, the signal processing device 29 communicates with the GPS receiver 25 according to a fixed protocol,
PS receiver 25 is a GPS satellite (a positioning satellite for navigation launched by the US Department of Defense for military purposes, four in six orbits to cover the entire globe, and the GPS receiver 25 is used. If the signal of at least three satellites is received, the current position of the vehicle, the traveling direction, the speed, etc. can be calculated) and the position of the own vehicle is calculated by tracking three or more to confirm whether the position data is valid. (270) If it is not valid, display that the GPS is not valid "NOGPS" is displayed on the screen (280), return to step 120, and if valid, receive the position coordinates from the GPS receiver 25 and display the screen. (290) where the GPS is not valid because the GPS receiver 25 still has more than two GPS coordinates.
This is when the satellite signal is not received, or when the GPS antenna 24 is blocked by an obstacle and cannot receive the GPS satellite signal.

Then, the default (D
efault) A map is displayed by driving the CD-ROM driver 27 to read the map around the vehicle where the vehicle is currently located (300) and displaying the position cursor 3 shown in FIG.
8 is overlaid on the road 41 on the road map and displayed (310).

At this time, the driver zooms as necessary.
It can perform in / out functions. When the zoom-in / out keys 34 and 33 are pressed, the signal processing device 29 senses this by the key scan operation of the key scan circuit 23 (320), and performs the corresponding zoom-in / out process (330). , No input of the zoom-in / out keys 34, 33 returns to step 120. Where stage 32
0 and 330 have the same functions as the stairs 170 to 200, but are abbreviated.

After performing step 330, the process proceeds to step 340 to determine whether there is destination setting data in the storage device of the signal processing device 29. If it is determined that there is no destination setting data, the signal processing is performed. The device 29 calculates the direction and distance from the current position of the vehicle to the set destination to create a destination information cursor 39, which is displayed on the map with the position cursor 38 at the center as shown in FIG. 2 (350), Return to step 120.

As shown in FIG. 2, numeral 16 of the destination information cursor 39 displayed centering on the position cursor 38
Means that the distance to the destination is 16 km, and that the direction of the destination is the northeast direction from the current position of the vehicle.

As another method, FIG. 5 (A) and FIG.
As shown in (B), the destination information cursor may be displayed on another portion of the map display screen 21A without performing the position cursor as a center or may be subjected to window processing.

[0032]

As described above, according to the present invention,
By always displaying the direction and distance to the destination centering on the position cursor of the vehicle, you can easily recognize the direction of the destination while driving, and the distance to the destination is the destination information cursor. Since it is displayed at the same time, it is possible to predict how long it will take to reach the destination.
In addition, the position cursor and the direction and distance of the destination are displayed in real time without any key operation in several steps, which helps the driver to drive safely, and if you set only the destination, you can select which road on the way. The distance and direction information to the destination is always displayed on the screen regardless of whether or not the vehicle is traveling, so there is no need to set the destination again during traveling.

[Brief description of drawings]

FIG. 1 is an overall system configuration diagram of the present invention.

FIG. 2 is a diagram illustrating a configuration of the display device of FIG.

FIG. 3 is a flow chart for explaining the operation of the present invention.

FIG. 4A is a drawing showing a destination setting cursor on a display device, and FIG. 4B is a drawing showing a setting destination on the display device.

FIG. 5 is a diagram showing another configuration of the destination information cursor.

FIG. 6 is a configuration diagram of a conventional vehicle navigation system.

7 is a view for explaining a selection device from the current position of the vehicle of FIG. 6 to a destination.

[Explanation of symbols]

 21 display device 21A map display screen 21B operating device 22 graphic generation circuit 23 key checking circuit 24 GPS antenna 25 GPS receiver 26 CD-ROM 27 CD-ROM driver 28 CD-ROM interface circuit 29 signal processing device 31 GPS key 32 sets Key 33 Zoom-out key 34 Zoom-in key 35 Map search key 36 Cursor frame key 37 Map direction key 38 Vehicle position cursor 39 Destination information cursor 40 Destination setting cursor

Claims (6)

[Claims] 1. Position detecting means for receiving a signal from a GPS satellite through a GPS antenna to detect the position of the vehicle,
Signal processing means for synthesizing storage means for storing map data, map data from the position detecting means and storage means and vehicle position information, and outputting a road map and current position data of the vehicle on the road map. And a display means for displaying the output signal of the signal processing means, the vehicle navigation system for measuring the current position of the vehicle and displaying the measured current position of the vehicle on a road map with a position cursor. On the map displayed on the display means, a destination information cursor that displays the direction and distance of the destination centered on the position cursor is displayed on one screen together with the position cursor under the control of the signal processing device. A vehicle navigation system characterized by the following. 2. The display means provides a map search key for map search, a cursor frame key for deciding and moving the direction of the cursor frame, and a destination setting cursor on the screen, and the destination setting cursor is displayed on the screen. 2. The vehicle navigation system according to claim 1, further comprising a map direction key to be moved and a set key to set the destination direction coordinates when setting the destination coordinates. 3. As for the destination information cursor, a destination setting cursor is provided by using a map direction key of the operation device of the display means, a destination is set by using the set key, and this point is set. 2. The coordinate value of 1 is stored in a memory in the signal processing means, and the signal processing means calculates the direction and distance from the current position to the destination, and is provided. The vehicle navigation system described. 4. The vehicle navigation system according to claim 1, wherein the destination information cursor is a numerical display of a distance around the position cursor. 5. The vehicle navigation system according to claim 1, wherein the destination information cursor has a direction displayed by an arrow and a distance displayed by a number at a predetermined portion on the map. 6. Position detecting means for receiving a signal from a GPS satellite through a GPS antenna to detect the position of the vehicle,
Signal processing means for synthesizing storage means for storing map data, map data from the position detecting means and storage means and vehicle position information, and outputting a road map and current position data of the vehicle on the road map. And a display means for displaying the output signal of the signal processing means, and measuring the current position of the vehicle, and displaying the measured current position of the vehicle on a road map with a position cursor. And a navigation display screen display for a vehicle, characterized in that a destination information cursor indicating a distance and a direction of a destination centering on the position cursor is graphically displayed at the same time as the position cursor on the displayed map. Method.