JPS61112233A - Map display device - Google Patents

Abstract

PURPOSE:To display a map picture while rotating in the traveling direction of a traveling object with a map display device incorporated to the traveling object like a car, etc., by processing the map information stored in a memory in response to the output of a direction detecting means. CONSTITUTION:When the traveling direction of a car is detected by a direction detector 5, this output information is sent to a picture processor 4 together with the map information stored previously to a memory 1 by means of a central processor 4. Then the processor 4 performs an operation at a high speed for rearrangement of coordinate points at the display positions given from the map information so that the upper part of map screen is set opposite to the traveling direction of the car. A picture 13 of the rearranged map is displayed on the picture player of a picture display device 3.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a map display device mounted on a moving body, and particularly to a means for storing map information by electronic means and displaying it on a cathode ray tube or the like as necessary. The present invention relates to an on-vehicle map display device having a vehicle-mounted map display device.

[Conventional technology]

A conventional map display device of this type has a grooved bottom as shown in FIG. That is, the storage device 1 is a semiconductor memory, a floppy disk, an optical disk, etc., and stores encoded map information, and signals read from the storage device 1 are sent to the central processing unit 2. The map is then controlled and calculated, and then displayed as a visually visible map on the screen of the cathode ray tube or liquid crystal panel of the image display device 3. This device lO
The displayed map corresponds to the information stored in the storage device 1, and in most cases, the map with the north direction at the top is displayed fixedly on the display screen. It was only. By the way, when determining the course of a car with reference to a map, everyone agrees that it is most preferable for the top of the map to match the direction of travel of the car in order to make quick and accurate decisions.

However, in the conventional device described above, the orientation of the displayed map is always constant and cannot be rotated and viewed in a car, making it extremely difficult to use in practice.

FIG. 6 is a front view of the map display device 10 of FIG. 5 incorporated into the dash board 11 of an automobile, and FIG. 7 is an enlarged plan view of the map display device 10 of FIG. 6. In these figures, it is easy to understand that if the car is traveling in a direction other than north, for example west, it is difficult to intuitively read the course of the car from this image 12.

[Problem that the invention seeks to solve]

An object of the present invention is to eliminate such drawbacks and to provide a map display device that is extremely easy to see and allows easy route determination.

[Friendly means of solving problems]

The configuration of the present invention is a map display device equipped with a means on a moving body for storing map information and displaying an image as necessary.
It is characterized by comprising means for rotating the image in accordance with the direction in which the moving object moves.

〔Example〕

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a map display device according to a first embodiment of the present invention. In the figure, the map display device of this embodiment includes a map information storage device f11, a central processing device 2, an image display device 3, an image processing device 4, and a direction detection device 5.

Here, storage device 1. The functions of the central processing unit 22 and image display device 3 are the same as those of the conventional device described above, but in this embodiment, the direction of travel of the vehicle is detected by the direction detection device 5, and the output information is generally is transmitted to the central processing unit 2 using a microcomputer, and is transmitted to the image processing unit 4 together with the map information from the storage device 1.

This image processing device 4 performs calculations at extremely high speed to rearrange the coordinate points of the display position given by the map information, based on the azimuth information, so that the top of the map screen corresponds to the direction of travel. In this way, W is rearranged.
A map image 13 shown in the Jz diagram is displayed on the screen of the image display device 3. 1. Image processing, which is a feature of this feature, conventionally took a long time even when using a large converter, making it completely impossible to install it in a car, but with recent advances in large-scale integrated circuit technology, By using all the integrated circuit elements that were created, called image processors, it can be easily realized in a form that can be installed in automobiles.

Next, the map display device according to the second embodiment of the present invention shown in FIG. 3 has a sensor 6 related to the traveling distance or vehicle speed of the automobile in addition to the above-mentioned configuration, and as shown in FIG. , it is possible to display the travel trajectory 16 of the vehicle on the image 14 superimposed on the map. In the same figure,
A current position 15 and a travel trajectory 16 are added. In this way, the usability of the map display device is further increased significantly.

Mano, above 1. In the second embodiment, the central control device 2
By setting additional functions of the image processing device 3, the map of the adjacent area can be read out from the storage unit as the car advances, the displayed map can be moved on the screen, enlargement of necessary parts on the screen, character It is possible to display place names, symbols, etc. on a map when combined with a generator.

Although the present invention has been described above as a vehicle-mounted device, the principles of the present invention can be applied to all types of moving bodies such as ships and aircraft.

〔Effect of the invention〕

As explained above, according to the present invention, it is not only possible to easily refer to the map necessary for driving in the car, but also the top of the screen can always be aligned with the course of the car.
Confirming the course becomes reliable and easy, which in turn helps prevent and prevent accidents.
This has the effect of contributing to improved safety.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a map display device according to a first embodiment of the present invention, FIG. 2 is an enlarged plan view of the display portion of FIG. 1, and FIG. 3 is a map display according to a second embodiment of the present invention. A block diagram showing the device, FIG. 4 is an enlarged plan view of the display part of FIG. 3, FIG. 5 is a professional diagram of a conventional map display device, and FIG. Front view showing implementation in 7th
The figure is an enlarged plan view of the display portion of the apparatus of FIG. 5. In the figure, l...storage device, 2... central processing unit,
3... Image display device, 4... Image display device,
5. River... direction detection device, 6... mileage sensor, 1o... image display device, 11... automobile dash board, 12° 13.14... display image,
15...Current position, 16...Travel trajectory. Agent Patent Attorney Susumu Uchihara Chi゛-゛1゜

Claims (1)

[Claims] A map display device equipped with a means for storing map information and displaying an image as necessary on a moving body, characterized in that the map has a means for rotating the image according to the direction in which the moving body moves. Display device.