JP2671499B2 - Car navigation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention maps a current position of a vehicle, a destination to be reached, etc., which is calculated based on positional information of the vehicle such as a traveling distance and a traveling direction. The present invention relates to a vehicle-mounted navigation device capable of displaying a mark on a screen.

(Prior Art) In recent years, various so-called in-vehicle navigation devices have been developed in which the current position of a vehicle is displayed on a map based on distance information from a traveling distance sensor and direction information from a traveling direction sensor. Have been.

An example of such a vehicle-mounted navigation device is that disclosed in Japanese Patent Laid-Open No. 60-196617. This is to detect the traveling distance and traveling direction of the vehicle and calculate the current position of the vehicle from these information, while storing the name of each place and its geographical coordinates in a storage device. When the place names of the starting point and the destination are specified by, the control device reads the name of each place and its coordinates from the storage device, displays the marks indicating the starting point and the destination at an appropriate scale on the display device, and according to this, It is configured to display a mark indicating the calculated current position of the vehicle.

(Problems to be solved by the invention) By the way, in such a vehicle-mounted navigation device, in addition to being configured to display the current position of the vehicle, the place of departure and the destination on the display screen, Destination direction mark, north direction mark,
In some cases, scale marks indicating the scale of the map are displayed at the same time.

The north direction mark and scale mark are usually displayed at the edge of the screen, but the destination direction mark can be moved on the screen as the vehicle moves, so other north direction marks and scale marks There is a possibility that they will be overlapped and displayed, and if they are overlapped and displayed, it will be difficult to identify them.

Therefore, conventionally, for example, when the destination direction mark is displayed so as to overlap the north direction mark, the current position mark C is positioned with respect to the north direction mark B as shown in FIG. Display from the center of the screen,
The two can be distinguished.

However, in this case, there is a problem that the display area of the map in the direction of the destination is hidden by the north direction mark B and decreases, and the map in the direction of the destination becomes difficult to see.

Therefore, the present invention avoids overlapping display of the destination direction mark and other, for example, north direction marks, and the map around the destination direction mark is obstructed by other, for example, north direction marks and the map of the destination direction is not seen. The purpose is to prevent getting rid of.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the problems described above, the structure of the present invention is, as shown in FIG. 1, a travel distance detecting means 1 for detecting the travel distance of a vehicle, A traveling direction detecting means 3 for detecting the traveling direction of the vehicle, a point setting input means 5 for setting and inputting the present location of the vehicle or a destination to be reached, and a traveling distance and traveling direction detecting means 3 detected by the traveling distance detecting means 1. Based on the traveling direction detected by the point setting input means 5
Current location calculation means 17 for updating and computing the current location input in
And a map data storage means 14 for storing map data and the like.
And a display means 15 for displaying a map display on the screen based on the stored information of the map data storage means 14 through the display control means, and a current location determined by the current location calculation means 17 and a destination set by the point setting input means 5. A mark display control means 21 for displaying other marks such as a destination direction mark indicating the direction of the destination, a north direction mark indicating the north direction on the map or a scale mark indicating the scale of the map on the map of the display means 15. And, when the destination direction mark is located in the vicinity of another mark, it has a destination direction mark priority display control means 23 for moving the other mark to a position away from the destination direction mark and displaying it. Is characterized by.

(Operation) According to the configuration of the present invention, the destination direction mark is displayed on the display screen in which the north direction mark or the scale mark is displayed on the edge of the screen, and the destination direction mark is positioned near the other marks. In this state, the destination direction mark is preferentially displayed and other marks are moved and displayed at a position away from here.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a block diagram showing an embodiment of the present invention.
Is a distance sensor that generates a signal corresponding to the traveling distance of the vehicle, and for example, a photoelectric sensor or a mechanical contact sensor that outputs a pulse signal proportional to the number of rotations of the tire is used. Further, 3 is an azimuth sensor for outputting the traveling azimuth of the vehicle, for example, a toroidal core type fluxgate type geomagnetic sensor, and 5 is for setting the present position of the vehicle or a destination to be reached for operating the present device. It is a keyboard sometimes used as a point setting input means. Each output signal of the distance sensor 1, the direction sensor 3 and the keyboard 5 is input to the control circuit 7. The control circuit 7 has arithmetic processing means such as a microcomputer to control the entire apparatus, and has a RAM 9 and a ROM 11 built therein. RAM9 is the control circuit 7
Temporarily stores necessary information when performing various arithmetic processes or control processes. The ROM 11 stores various control programs such as a calculation program for calculating the current position of the vehicle and a processing program for changing the display screen according to the traveling direction of the vehicle.

The control circuit 7 includes a present location calculation means, a display control means, a mark display control means, and a destination direction mark priority display control means.

Reference numeral 13 is a CD-ROM driver incorporating a CD-ROM board 14 as a map data storage means for storing map data. Reference numeral 15 is a display means for displaying a wide area map or a detailed map, on which the current position of the vehicle, which is calculated by the control circuit 7 and which changes from moment to moment, as well as the starting point, the destination and the direction of the destination are displayed. Is a CRT.

Next, based on the flowchart of FIG. 4, the control circuit 7
Will be described.

First, initialization is performed to start the control operation (step 301), and in the next step 303, it is determined whether or not the current location is stored. If the current location is stored, it is determined in the next step 305 whether or not to correct the current location. If the current location is to be corrected, the procedure proceeds to step 307 to correct the current location. Step 3 above
If the current location is not stored in 03, the above step 30
Set the current location at 7. After correcting or setting the current location in this way, and when it is not necessary to correct the current location in step 305, proceed to step 309,
The update calculation of the current location accompanying the movement of the vehicle is performed.

When the update calculation of the current location is performed, the process proceeds to step 311, and it is determined whether or not the destination is set. If the destination has been set, it is determined in the next step 313 whether or not to correct the destination. If the destination is to be modified here, that processing is performed (step 315) and the direction of the destination is determined. Is calculated (step 317). If the destination is not set in step 311, it is determined whether or not the destination is set in step 319. If the destination is set here, the destination setting process is performed in step 315. . If the destination is not set, the display is output as it is (step
321). If you do not modify the destination in step 313,
The direction of the set destination is calculated as it is (step 317).

Next, when the direction of the destination is calculated, the destination direction mark is in a state of being displayed on the screen of CRT15, but this mark indicates another mark on the CRT screen, such as the north direction mark or the scale of the map. It is judged whether or not it is in a state where it is displayed so as to be overlapped with the indicated scale mark (step 32
3). Here, if the destination direction mark is displayed in a state of being overlapped with another mark, move the other mark to the edge of the screen away from the destination direction mark (step 32
5) Display output (step 321). For example, as in the conventional example shown in FIG. 7, when the north direction mark B is displayed in the upper left corner of the screen, the destination direction mark A is displayed in the upper left corner overlapping the north direction mark B. In the case of, the north direction mark B is moved and displayed in the upper right corner of the screen away from the destination direction mark A as shown in FIG. As a result, the destination direction mark and the north direction mark are not overlapped and displayed, so that both can be identified and the map display area in the destination direction is not blocked by the north direction mark. The map toward the destination will be easy to see.

FIG. 6 is a flowchart showing the control operation of another embodiment. In this embodiment, as shown in FIG. 5, when the current position mark C and the destination direction mark A are both displayed on the same screen, the process of deleting the destination direction mark A is performed. This is added to the flowchart of the control operation shown in FIG.

That is, the direction of the destination is calculated as it is (step 31
If the destination direction mark is displayed in 7), it is determined whether or not the destination direction mark and the current position mark are displayed in the same screen (step 60).
1) If they are both displayed on the same screen, then arithmetic processing is performed so as to erase the destination direction mark (step 603) and display output (step 321). As a result, the number of marks on the screen is not displayed more than necessary, so that the display area of the marks is reduced and the screen as a whole is easy to see.

As described above, according to the configuration of the present invention, when the destination direction mark is displayed in the vicinity of another mark such as the north direction mark, the destination direction mark is given priority. Since it is displayed and other marks are displayed at a position away from the destination direction mark, both can be distinguished, and the display area of the map around the destination direction with respect to the displayed map screen is expanded, The other marks will not get in the way, and the map toward the destination will be easy to see.

[Brief description of the drawings]

FIG. 1 is a claim correspondence diagram of the first structure of the present invention, and FIG.
FIG. 4 is a block diagram showing the second configuration of the present invention, FIG. 3 is a block diagram showing an embodiment of the present invention, FIG. 4 is a flow chart showing the control operation of the control circuit in the block diagram, and FIG. Explanatory drawing of the display screen by Example, 6th
FIG. 7 is a flow chart showing the control operation of another embodiment of the present invention, and FIG. 7 is an explanatory view showing a conventional display screen. 1 …… Running distance detecting means (distance sensor) 3 …… Running direction detecting means (direction sensor) 5 …… Point setting input means (keyboard) 14 …… Map data storage means (CD-ROM board), 15 …… Display Means (CRT) 17 …… Current location calculation means, 19 …… Display control means, 21 …… Mark display control means 23 …… Destination direction priority display control means 25 …… Mark deletion means

Continuation of front page (56) Reference JP 62-95699 (JP, A) JP 58-142217 (JP, A) JP 60-224020 (JP, A) JP 62-106600 (JP , A) JP 61-194472 (JP, A) JP 2-32214 (JP, A) JP 62-5123 (JP, A) JP 60-107200 (JP, A) JP 62-235700 (JP, A)

Claims (1)

(57) [Claims] 1. A traveling distance detecting means for detecting a traveling distance of a vehicle, a traveling direction detecting means for detecting a traveling direction of the vehicle,
Point setting input means for setting and inputting the present location of the vehicle or a destination to be reached, and the current location input by the point setting input means based on the traveling distance detected by the traveling distance detecting means and the traveling direction detected by the traveling direction detecting means. Current position calculation means for updating and calculating, map data storage means for storing map data and the like, display means for displaying a map display on the screen based on the storage information of the map data storage means, and the current location. A current direction obtained by the calculation means and a destination direction mark indicating the direction of the destination obtained from the destination set by the point setting input means, a north direction mark indicating the north direction on the map or a scale mark indicating the scale of the map, etc. Mark display control means to display the mark on the map of the display means, and the destination direction mark near the other marks. When location-vehicle navigation apparatus; and a destination direction mark priority display control means for displaying to move the other mark at a position away from the destination direction mark.