JP2825376B2 - Navigation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation system for a vehicle, and more particularly to a navigation system capable of displaying the position of a vehicle at the center of a map even when character information is displayed.

[0002]

2. Description of the Related Art With the progress of car electronics, a navigation system that displays a map on an on-vehicle display and displays the current position of the vehicle on the map has been put to practical use. FIG. 6 is a configuration diagram of a general navigation system, which includes a main controller 620, a data controller 630, and a vehicle position detection system 640 around a bus 610.

An operation device 621 such as an operation panel and a display 622 such as a liquid crystal panel are connected to the main controller 620, and information is displayed on the display 622 based on a command input from the operation device 621. The data controller 630 includes, for example, a CD.
-A storage device 631 such as a ROM is connected, and the storage device 631 stores graphic data for displaying a map and attribute data such as station names, road names, and river names.

The vehicle position detection system 640 is connected with a geomagnetic sensor 641 and a speed sensor 642, and detects the position of the vehicle based on information detected by these sensors. FIG. 7A shows a display example of a CD-ROM.
The graphic data read from the ROM 631 is displayed such that the position of the own vehicle is at the center of the screen, and the traveling direction of the own vehicle is displayed by an arrow.

[0005]

In this navigation system, not only a map but also character information such as a station name and a road name can be displayed on a map. However, displaying all character information makes it difficult to recognize the map. Therefore, it is common to have a function of selecting an attribute of character information to be displayed in advance and displaying only the selected attribute. It is.

FIG. 7B shows a screen for selecting an attribute to be displayed. The displayable attribute is displayed on the right third of the display 622. Since characters are displayed on the right third of the screen, the display position of the own vehicle is not at the center of the map, and it is difficult to recognize the map, especially when the own vehicle is traveling east. The present invention has been made in view of such a problem, and the present invention is applicable to a case where other information is displayed.
An object of the present invention is to provide a navigation system capable of easily recognizing a map around a position .

[0007]

FIG. 1 is a basic configuration diagram of a navigation system according to the present invention. FIG. 1 shows a storage unit 110 storing graphic data 111 and attribute data 112 for displaying a map, and a storage unit. Display only the graphic data 111 stored in the
Display mode selection means 120 for selecting whether to display both the attribute data 112 and the display data, and the display mode selection means 12
Display means 130 for displaying the data selected by 0
When, the vehicle position detecting means 140 for detecting the vehicle position
When a display area determination unit 150 for vehicle position detected by the vehicle position detecting unit 140 determines the display range of the graphic data 111 as the center, the display mode selection means 12
0 when the mode for displaying both the graphic data 111 and the attribute data 112 is selected by the display unit 130
And display range correction means 160 for correcting the display range of the graphic data displayed in the remaining portion of the display range of the attribute data 112 above so that the own vehicle position is centered.

[0008]

According to the present invention, even when character information such as attribute selection is displayed on the display, the own vehicle position is displayed at the center of the map.

[0009]

FIG. 2 is a functional block diagram of an embodiment of the navigation system according to the present invention, which is constituted by a microcomputer. FIG. 3 is a schematic diagram of a graphic RAM 215 that stores read graphic data for, for example, nine screens.

Storage means 210, for example, a CD-ROM
Records graphic data 211 for displaying a map and attribute data 212 for displaying attributes on the map. The operation panel 225 is provided with a display mode switch 220 for selecting whether to display only the graphic data 211 stored in the storage means 210 or to display both the graphic data 211 and the attribute data 212.

When the display of only the graphic data is selected, the vehicle position to which the outputs of the terrestrial magnetism sensor 241 and the speed sensor 242 are connected is selected from the graphic data for nine screens once read into the graphic RAM 215. The display range A is determined so that the own vehicle position P detected by the detection system 240 becomes the center of the screen. The screen whose display range is determined is sent to the controller 250 and processed, and then displayed on the display 230, which is a liquid crystal display, for example.

On the other hand, the display mode switch 220
While the attribute data 212 to be displayed is selected, the character information of the attribute data to be displayed is sent to the controller 250.
For example, if character information is to be displayed on the right one-third of the display 230, graphic data will be represented in the remaining two-thirds. Therefore, the controller 250
Then, both ends of the display range A are cut out by 1/6, and the display range is changed to A '. Further, the entire display range is moved to the left by 1/6 and sent to the display device 230.

FIG. 4 is a flowchart of a processing routine executed by the controller 250, which is executed at regular time intervals. In step 401, graphic data is read from the storage means 210 which is a CD-ROM. Step 40
2, the own vehicle position is determined, and in step 403, the display range is determined so that the own vehicle position becomes the center.

In step 404, it is determined whether or not the attribute selection mode is selected by the display mode selection switch 220. If a negative determination is made in step 404, the process proceeds to step 405, where the attribute data is read from the storage unit 210, which is a CD-ROM. Step 404
If an affirmative determination is made in step, the process proceeds to step 406, and the attribute selection display is displayed on the right 1/3.

Next, in step 407, the display range is corrected so that the graphic data is displayed around the position of the own vehicle in the remaining portion of the display area of the attribute data, and the flow advances to step 407. If the result of the determination in step 404 is affirmative, the process also proceeds to step 408 to display the processing result on the display device.

FIG. 5 shows a display example of the display 230 of the navigation system according to the present invention. Character information is displayed on the right one-third, and a map is displayed on the remaining two-thirds centering on the own vehicle position. I have.

[0017]

According to the present invention , the display is limited.
When displaying a map that includes the position of the vehicle in the
Map based on the position of the vehicle according to the display range of the spray
Since the display is performed, you can check the map around the vehicle position
And easily recognize which direction your vehicle is traveling
Become.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a navigation system according to the present invention.

FIG. 2 is a functional configuration diagram of an embodiment of a navigation system according to the present invention.

FIG. 3 is a schematic diagram of a graphic RAM;

FIG. 4 is a flowchart of a processing routine.

FIG. 5 is a display example according to the present invention.

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

FIG. 7 is a display example of a conventional navigation system.

[Explanation of symbols]

110 ... storage means 120 ... display mode selection means 130 ... display means 140 ... own vehicle position detection means 150 ... display range determination means 160 ... display range correction means

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G01C 21/00

Claims (1)

(57) [Claims] 1. Reading means for reading data relating to a map
Vehicle position detecting means for detecting the vehicle position;
A navigation system comprising: a vehicle location detection unit that detects a location of the vehicle based on the vehicle position detected by the vehicle position detection unit.
A first mode in which a figure is displayed on the entire surface of the display means, and a ground based on the own vehicle position detected by the own vehicle position detection means.
A second mode for displaying a figure in a part of the display means
And a second mode is selected by the display mode selecting means.
The vehicle position in the partial area of the display means.
Display range to correct the display range of the map so that
Navigation, comprising:
system.