Current location indication apparatus for use in an automotive v

Details Current location indication apparatus for use in an automotive v Current location indication apparatus for use in an automotive v

1983-05-06

1986-12-16

Caldwell, Sr., John W.

Communications: electrical

Vehicle position indication

Map display

340988, 364445, 364460, G08G 112

Patent

active

046300651

ABSTRACT:
A current location indicating apparatus for use in an automotive vehicle wherein a current location of the automotive vehicle in terms of two-dimensional coordinates may be obtained arithmetically by a signal processing unit on the basis of a signal to detect a current travel distance of the vehicle and a signal to detect a current direction of travel taken by the vehicle, so that the current location of the vehicle may be indicated visually on a display screen on the basis of the thus-obtained locational data which varies from time to time. The apparatus comprises a microfilm including a plurality of fractioned area maps with a part of the areas thereof overlapped with each other, an access unit adapted to access each of the plurality of area maps, and an image pick-up unit adapted to photographically pick-up the images of the area maps accessed. A desired area map is presented on the display screen in accordance with the graphic information of each of the area maps as read-out by the image pick-up unit, and when the current locational point of the vehicle comes near the edge of the area of display of an area map currently on the display as the vehicle proceeds in its travel, another related area map with a part thereof overlapped with the previous one is switched to on the display under the control of the signal processing unit.

REFERENCES:
patent: 4138726 (1979-02-01), Girault
patent: 4139889 (1979-02-01), Ingels
patent: 4400727 (1983-08-01), Aron
patent: 4400780 (1983-08-01), Nagao
patent: 4499491 (1985-02-01), Aron
patent: 4513377 (1985-04-01), Hasebe
patent: 4550317 (1985-10-01), Moriyama

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