JPS62267616A - Map data display device - Google Patents

Abstract

PURPOSE:To bring the position relation of a scene which a driver sees and the positional relation of a display map on a display means into coincidence by providing a display/control means for controlling so that an advancing direction coincides with a direction of a map data displayed on the display means in response to an output of a direction detecting means. CONSTITUTION:The present position which has been detected by a position detecting means 7 is displayed by a triangle, and advances in the direction of an intersection (a). This advance direction is detected by a direction detecting means 8, a rotation display signal for displaying a map data in a state that it has been rotated by 225 deg. is outputted from a display control circuit 4, and a map data in which the advance direction is in the upper part is displayed. When an automobile turns to the right at the intersection (a) and goes to an intersection (b), the means 8 detects a fact that the advance direction is the southwest, and the map data is displayed, based on the rotation display signal of 135 degrees. In this way, a position relation of a scene which a driver sees and a display map on a display means is made to coincide.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to an apparatus for displaying map data.

(Naka) Conventional technology Recently, map data has been transferred to CRT display means,
A device has been proposed that displays the current position and target position on a liquid crystal display means or the like and also displays the current position and target position on the display screen. When a car is equipped with such a device and is driven, the direction of the map displayed on the screen of the display means is always the same (for example, north is upward), regardless of the direction in which the car is traveling. )Met.

e→ Problems to be Solved by the Invention The present invention aims to display a map according to the direction of travel of a car.

2) Means for solving the problem: a display means for displaying map data, a direction detection means for detecting the direction of travel, and a direction of travel displayed on the display means in response to the output of the direction detection means. and display control means for controlling the map data so that the directions match.

(e) The direction of action and the direction of the map data displayed on the display means coincide with each other, and the positional relationship between the scenery actually seen by the driver and the map displayed on the display means coincides.

(f) Example Map data is stored in the main memory (1). Using an input means (2) such as a keyboard, enter the address of the map data to be displayed, for example, the current position and the target position, using the keys manually (
For example, latitude and longitude), the system diagram data is read out, transferred to the display memory (5) via the display control circuit (4), and displayed on the screen of the display means (CRT display) (6).

FIG. 2 shows an example of map data stored in the main memory (1). The direction in which lower-order addresses change is stored in correspondence with the east-west direction on the map, and the direction in which upper-order addresses change in correspondence with north-south, and based on the address instruction from the input means (2), for example, the broken line shown in FIG. portion is displayed on the screen of the display means (6). The display control circuit (4) outputs a synchronization signal for display, a rotation display signal for map data, an index display output for displaying the current position detected by the position detection means (7) as an index on the screen, etc. Occur. Position detection means (
As for 7), a configuration using a geostationary satellite or geomagnetism can be used.

Now, suppose that the rotation display signal generated by the display control circuit (4) has a rotation angle of 0 degrees, and the map data shown in Figure K2 is displayed as shown in Figure 3 (λ). . It is assumed that the position detection means (7) detects the vehicle (as indicated by a triangle) and that the vehicle is traveling in the direction of the intersection λ (southeast). This direction of movement is determined by the direction detection means (8)
[For example, a configuration using geomagnetism can be used] is detected, and the display control circuit (4) outputs a rotation display signal for displaying the map data rotated by 225 degrees.
Therefore, as shown in Figure 6(b), the map data is displayed with the direction of travel (southeast) facing upward.The rotation display signal is set at a 90 degree angle with the west facing upward. The angle where south is upward is 180 degrees, and the angle where east is upward is 270 degrees.

When you turn right at the intersection λ and head towards the intersection, the direction detection means (
8) detects that the direction of travel is southwest.

Based on the 135 degree rotation display signal, map data is displayed as shown in FIG.

In the embodiment described above, one map data stored in the main memory (north is upward) is rotated and displayed, but the map data is displayed in advance in each direction (for example, at 45 degrees). A configuration may also be adopted in which data is stored in the main memory and is selectively read out and displayed.

(G) Effects of the Invention According to the present invention described above, the scenery actually seen by the driver and the map displayed on the screen of the display means coincide in positional relationship, which is advantageous.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a map data display device according to the present invention, FIG. 2 is a diagram showing map data, and FIG. 3 is a diagram showing a state in which the map data is displayed in rotation.

Claims (1)

[Claims] (1) A display means for displaying map data, a direction detection means for detecting the direction of travel, and in response to the output of the direction detection means, the direction of travel matches the direction of the map data displayed on the display means. 1. A map data display device comprising: display control means for controlling the map data.