JPH04159590A - Navigation device - Google Patents

Abstract

PURPOSE:To correct its own vehicle position with a few key operation by displaying an intersection name successively from a map near its own vehicle position and selecting. CONSTITUTION:The intersection name is displayed successively from the map near its own vehicle position and selected. For example, before the intersection name of a No.5 near its own vehicle position is displayed, a time for displaying the intersection names of No.1 - No.4 is needed, and the several-time key operations are also needed in order to change it to the intersection name of the No.5, however, since the map near its own vehicle position is No.5, the intersection name in this map is displayed first. Thus, it is possible to select the intersection name near its own vehicle position with a few key operation in a short period.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a navigation device that has a function of correcting the position of the vehicle based on the name of an intersection. In a navigation device having a vehicle position correction function that displays the vehicle position on a map and corrects the vehicle position to an intersection selected by the intersection name, the intersection name is displayed on the map near the vehicle location. The configuration is such that the items are displayed in order and the user makes a selection.

[Industrial application field]

The present invention relates to a navigation device having a function of correcting the position of a vehicle based on an intersection name.

[Conventional technology]

Navigation systems that display a map on an in-vehicle display and display the vehicle's position overlaid on the map can display the vehicle's position with minimal deviation from the actual vehicle's position by appropriately correcting the vehicle's position on the map. shall be.

It is convenient to use intersections to correct the vehicle's position on the map, and it is particularly useful to enter the intersection name to correct the vehicle's position.

By the way, as shown in FIG. 2, a conventional navigation system has an editing screen several times the size of the display screen, and the map on the display screen is always shifted so that the position of the user's vehicle is at the center of the display screen. The editing screen in the figure is nine times larger than the display screen, and is l! 1l-IJct9 are divided maps with the same area as the display screen.

When using this system to correct the vehicle's position using intersection names, conventionally the intersection names for each segmented map are displayed in order from kl on the editing screen and the user is asked to select one. That is, initially N
Display the intersection names of all intersections included in αI, check whether the name of the intersection where your vehicle is actually located is among them, and if not, display the intersection name of the next NCL2 by key operation. Take the method of doing so.

[Invention or problem to be solved]

With the conventional own vehicle position correction function described above, it takes time to display the intersection names of Nα1 to 4 in order until the name of the intersection on floor 5 near the own vehicle position is displayed. The disadvantage is that it requires several key operations to change the intersection name.

The present invention enables the vehicle position to be corrected within a short period of time with a small number of key operations by starting the display of the intersection name from a portion close to the vehicle position.

[Means to solve the problem]

The present invention provides a navigation device having a vehicle position correction function that displays the vehicle position on a map within a display screen and corrects the vehicle position to an intersection selected based on the intersection name. The feature is that the map is displayed in order from the map closest to the vehicle position and the map is selected.

[Effect]

Using FIG. 2 as an example, since the map closest to the vehicle's position is Nα5, the intersection name in this map is displayed first. Among these intersection names, there is a high probability that there is an intersection name that is close to the actual location of the vehicle. However, if there is a large discrepancy between your vehicle's location on the map and your actual vehicle's location, it may not be on the 5th floor.
In that case, by operating a predetermined key, the items are displayed in order starting from NCLL and selected.

By doing this, it becomes possible to select the name of an intersection close to the vehicle's position within a short time with a few key operations.

〔Example〕

FIG. 1 is a block diagram of a system to which the present invention is applied.

The general operation of this system will be explained below. First, the CD-RO is loaded via the main microcomputer 101 or the communication bus 102.
Map data is requested from the M microcomputer 103. CD-R
The OM microcomputer 103 reads the data from the CD-ROM O4 and sequentially sends it to the main microcomputer 101 via the communication bus 102.
Send to. At that time, road data is sent to the location microcomputer 105. The main microcomputer 101 is C
LCD display 10 based on the data of D-ROMI O4
6. Draw a map. When the user specifies the current location of the own vehicle using the touch 5WIO7, the main microcomputer 101
displays a car marker on the map and transmits the coordinates to the location microcomputer 105.

Thereafter, the location microcomputer 105 performs map matching processing using the geomagnetic sensor 108, wheel speed sensor 109, and road data on the map, and periodically transmits the vehicle position to the main microcomputer 101.

The main microcomputer 101 is a location microcomputer 10.
When the position of the car is obtained from step 5, the marker display of the car on the map on the display 106 is updated. 110 is a driver that drives the LCD display 106, and 111 is a decoder that decodes the output of the CD-ROMI O4.

The user can use crOSS to correct the position of the car based on the intersection name.
It starts by operating the key 112.

That is, in the present invention, intersection names are read out in order from the map data of NCL 5 that includes the own vehicle position, and
to be displayed. Even if all the intersection names of Nα5 are displayed, if there is still some display space left, the intersection names of the map around Nt15 (kl~ to 4 to 6 to n9) are displayed. If the user does not find the intersection name he/she wants to specify, he/she can click again.
All you have to do is operate the ross key 112. Then, the name of the intersection 5, which has not been displayed yet, is displayed, and if there is any remaining display space, the names of the intersections of the map 1-Nα4, k6-9 are displayed in the same way. If there is an intersection name that the user wants to specify, touch 5W107 corresponding to that intersection name.
(display position of the intersection name you want to specify). Then, the main microcomputer 101 moves the car marker display to the intersection name and transmits the coordinates to the location microcomputer 105.

FIG. 3 is a YACn chart showing the intersection name display processing performed by the main microcomputer 101 among the operations described above.

In this example, the map location for reading intersection names is 5. 1. 2
．． 3. 4. , 6. 7. 8. 9, and these are distinguished by j=0 to 8. That is, initially i
=O to display the intersection name on floor 5. Next is 1
= 1 to display the intersection name in Sou1.

FIG. 4 shows the contents of main processing by the main microcomputer 101. This process includes a process of reading map data from the CD-ROMI O4 and displaying the map, a process of displaying a car marker at the position of the own vehicle, a process when the Cross key 112 is operated, and a process of correcting the position of the own car.

The display screen in FIG. 2 is centered on the own vehicle position, and shifts in that direction when the own vehicle position moves. However, the vehicle position is 5
When the boundary is crossed, the editing screen is scrolled so that the section map that includes the vehicle's position is newly set to 5. Therefore, the vehicle position on the map is always on floor 5.

In such a method, displaying the intersection name from NCL5 makes it easier to find an intersection name that is close to the actual location of the vehicle.

In the example of FIG. 3, floor 1 is placed next to floor 5, but this order can also be changed according to the moving direction of the vehicle's position on the map. For example, in the case of Fig. 2, it is easier to find N (15 -> Tue 2 -> Floor 3 -> Seed 6. This method can be easily realized by determining the coordinates of the vehicle's position on the map.

In another method, the scroll limit is kl, 3°7.9
In some cases, it is a frame connecting each center of the frame. In this method, since there is a possibility that the vehicle's position will be included in all map divisions, it is a good idea to determine the order of the intersection names to be displayed according to the coordinates of the vehicle's position.

FIG. 5 shows an example of an intersection name display screen.

Is it normal for the intersection name display screen to be displayed with the map display screen turned off?If you continue driving with this on, you will not be able to tell where your vehicle is. Therefore, in this example, both screens are displayed superimposed. The base is a map display screen, in the center of which a car marker indicating the position of the own vehicle is displayed. The intersection name is written in letters (in the figure, the number 1) in the outline display frame.
~20 notation). When the intersection name is reduced to just the display frame and text in this way, most of the map below can be seen. If the map is still difficult to read, you can avoid using the area near the marker to display intersection names. That is, in the illustrated example, a total of 20 intersection names can be displayed, but if the intersection name display is stopped at the broken line area, the map near the marker can be clearly seen. Note that the display frame also serves as each SW of the matrix touch SW.

Figure 6 shows YAC when displaying intersection names as in Figure 5.
This is an n chart. There are 1 to 20 intersection name display frames, of which 7 to 9. Since 12 to 14 are not used for intersection name display, this part is skipped while the counter counts from 1 to 21. In other words, since the counter value indicates the display location, first, the counter value is set to "1" and the display is started from the upper left. The number that can be displayed per degree is from 1 to 20, so it is checked whether the counter value has reached "21" and if it is less than 20, the next process is performed. Next, if the counter value is 7 to 912 to 14, it is near the center, so the counter value is +1 and the above whil
Go to e-text. Therefore, if the counter value is other than 7-9 or 12-14, the following processing is performed. If there is no intersection name to display, break is performed, the while statement is removed, and the process ends. If there is an intersection name, the intersection name is displayed according to the counter value.

Then, the counter value is set to +1, and the process returns to the while statement, and the process is performed in the same manner.

〔Effect of the invention〕

As described above, according to the present invention, when correcting the vehicle position based on the intersection name in a navigation device that displays the vehicle position on a map, there is an advantage that the vehicle position can be corrected within a short time with a few key operations. be.

[Brief explanation of drawings]

Figure 1 is a system block diagram of the navigation device, Figure 2 is an explanatory diagram of the map display screen, Figure 3 is a YACn chart of intersection name display processing, Figure 4 is a chart of main processing of the main microcomputer, and Figure 5 is a diagram of the main processing of the main microcomputer. An explanatory diagram of the intersection name display screen, FIG. 6 is a YACII chart of intersection name display processing. In the figure, 101 is the main microcomputer, 104 is the CD-ROM
, 106 is an LCD display, 107 is a touch SW, 112
is the cross key. Applicant: Minoru Aoyagi, Patent Attorney, Fujitsu Ten Limited Figure 4: Explanatory diagram of the intersection name display screen. Figure 5: Intersection name display processing of Ike no YACI.

Claims (1)

[Scope of Claims] 1. A navigation device having a vehicle position correction function that displays the vehicle position on a map within a display screen and corrects the vehicle position to an intersection selected by an intersection name, comprising: A navigation device characterized by displaying and selecting intersection names in order from a map closest to the vehicle's location.