JPH07311051A - Onboard navigation system - Google Patents

Abstract

PURPOSE:To provide an onboard navigation system which displays positioning state information or speed information at approximately the center position of a screen, together with a normal navigation screen. CONSTITUTION:At least either of positioning state information indicating positioning method or vehicle speed information is displayed by the deformation into respective different configurations of a mark 1 which shows the position of the vehicle. To display the positioning state information, for example, two- and three-dimensional positioning methods employ different configurations for display; to display the vehicle speed information, different configurations are displayed either in steps or continuously according to whether the speed is fast or slow.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted navigation system, and more particularly to a vehicle-mounted navigation system that facilitates visibility of navigation information displayed on a display.

[0002]

2. Description of the Related Art Position information obtained by receiving radio waves from a position determination assistance system such as a GPS satellite or obtained from a position determination device attached to a vehicle is used as CD-RO.
In-vehicle navigation systems that display on a liquid crystal display screen together with map information stored in a storage medium such as M have been remarkably put into practical use in recent years.

In the conventional vehicle-mounted navigation system, the navigation information displayed on the display includes map information around the current vehicle position and the destination position, and the current navigation information as the current navigation information. Map information around the vehicle position, the position of the vehicle, and its traveling direction are displayed by display marks or the like.

By the way, as the navigation information,
In addition to the position of the vehicle currently running and the surrounding map information,
Positioning state information indicating whether the positioning is performed by the two-dimensional positioning system or the three-dimensional positioning system depending on the number of GPS satellites to be received and the reception state, the vehicle speed information, and the like are included as important information. Conventionally, such positioning state information, speed information, etc. are not displayed in the usual navigation display that displays the vehicle position, but are displayed separately by switching the screen.

For example, in the normal navigation display as shown in FIG. 4, the position and the traveling direction of the vehicle traveling on a straight road are displayed with a triangle arrow C near the center of the screen together with the map image. Positioning information such as latitude and longitude information and speed information obtained by the system are not displayed on the map screen. Then, the positioning state information is displayed small on the outside of the map screen. Positioning status information is usually 3
When using two GPS satellites,
When receiving four or more GPS satellites, positioning is performed by the three-dimensional positioning method. However, for example, five GPS
Even if the satellites are being received, the two-dimensional positioning method may be used when the angular positions of the satellites are close to each other or the reception intensity. FIG. 4 shows a state in which "3" indicating the three-dimensional positioning method is displayed. When the user wants to know the positioning state information and the speed information, he or she operates the specific key to switch the display screen to display the latitude, longitude and speed information as shown in FIG.

[0006]

As described above, in the conventional system, the navigation display in the normal state displays the map information such as positioning information and speed information and the information other than the own vehicle position therein. However, since the positioning information and the speed information are displayed for the first time by operating the specific key to switch the screen, the operability is poor for visually recognizing various kinds of information. In addition, the method of displaying positioning state information and speed information at the end of the normal navigation display by operating a specific key also has a problem in terms of operability, and since the positioning state information is displayed outside the map screen, The map screen becomes smaller and there is a problem of visibility.

Therefore, an object of the present invention is to provide a vehicle-mounted navigation system that displays positioning state information and speed information together with a normal navigation screen at a substantially central position of the screen.

[0008]

In order to achieve the above-mentioned object, the vehicle-mounted navigation system according to the present invention determines the vehicle position and its traveling direction obtained based on the positioning information about the vehicle on a map screen. In a vehicle-mounted navigation system displaying with a display mark, it is configured to display at least one of positioning state information indicating the positioning method and speed information of the own vehicle by transforming the display mark in different modes. . The positioning state information may be displayed in different display modes between the two-dimensional positioning system and the three-dimensional positioning system, or the speed information of the own vehicle may be displayed stepwise or continuously depending on the speed change. It can be displayed in different display modes.

[0009]

In the present invention, at least one of the positioning status information and speed information regarding the vehicle such as the vehicle position is displayed by changing the display mark indicating the vehicle position in different modes. For example, the positioning state information is displayed in different display modes between the two-dimensional positioning system and the three-dimensional positioning system, and the speed information of the own vehicle is displayed differently in a stepwise manner or continuously depending on the speed of the vehicle. Display with.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a display screen in an embodiment of a vehicle-mounted navigation system according to the present invention. On the display screen, along with the map screen, the position and the traveling direction of the vehicle traveling along the road are displayed in the same manner as in the conventional case with the position of the triangular mark 1 and the arrow direction. In addition, in the present embodiment, the positioning state information is displayed in the display mode inside the triangular mark 1. For example, the planar display mode shown in FIG.
In the three-dimensional positioning method, the three-dimensional display mode shown in FIG.
The dimensional positioning method is shown.

Further, the speed information is displayed in different display modes such that the triangular marks overlap with each other or are shaded so as to float. For example, as shown in FIG. 3 (A), one triangular mark is stopped, but as shown in FIGS. 3 (B) and 3 (C), it is stepwise depending on the distance between the two superimposed triangular marks. Or the speed is displayed continuously. That is, the larger the distance between the two triangular marks, the higher the speed.

The switching between the two-dimensional positioning method and the three-dimensional positioning method is automatically switched depending on the number of GPS satellites to be received, the reception intensity, etc., but the positioning accuracy is higher in the three-dimensional positioning method.
In the present embodiment, it is possible to easily and visually grasp the number of dimensions of the current positioning by the difference in the display mode of the triangular marks as shown in FIGS. 2 (A) and 2 (B).

In the above embodiment, the difference in the positioning state information is displayed by the difference in the two-dimensional and three-dimensional display form of the triangular marks as shown in FIGS. 2A and 2B, and the speed information is shown in FIG.
As shown in (A) to (C), the ratio of the floating height of the triangular mark (distance between the two triangular marks) is used. However, these expressions and display modes are merely examples. It can also be displayed according to the degree of change of the color, shape, size, blinking speed, etc. of the vehicle position display portion such as a mark.

[0014]

As described above, according to the vehicle-mounted navigation system of the present invention, the positioning status information is displayed on the normal navigation screen on which the map screen and the vehicle position are displayed without requiring a specific operation. Since speed information is displayed, a large amount of navigation information can be visually recognized quickly, so that operability and navigation function can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a display screen in an embodiment of a vehicle-mounted navigation system according to the present invention.

FIG. 2 is a diagram showing a display example of positioning state information in the embodiment of the present invention.

FIG. 3 is a diagram showing a display example of speed information in the embodiment of the present invention.

FIG. 4 is a diagram showing a navigation display example in a conventional vehicle-mounted navigation system.

FIG. 5 is a diagram showing an example of a navigation display in a conventional vehicle-mounted navigation system, displaying latitude, longitude, and speed information.

[Explanation of symbols]

 1 Vehicle position display mark

Claims (3)

[Claims] 1. A vehicle-mounted navigation system that displays a vehicle position and its traveling direction obtained on the basis of positioning information about the vehicle by a predetermined display mark on a map screen, and positioning state information indicating the positioning method. And at least one of the speed information of the host vehicle and the display mark are modified in different modes to be displayed. 2. The in-vehicle navigation system according to claim 1, wherein the positioning state information is displayed in different display modes for a two-dimensional positioning system and a three-dimensional positioning system. 3. The vehicle-mounted navigation system according to claim 1, wherein the display of the speed information of the own vehicle is performed in different display modes stepwise or continuously depending on the speed of the vehicle.