Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1992-01-28
1993-02-23
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
342357, 364449, 340995, G01S 302
Patent
active
051894300
ABSTRACT:
A navigation system for a movable body wherein a moving locus of the movable body displayed on a screen of display means can be identified readily and clearly from a map displayed on the screen to prevent misunderstanding of the map. The system comprises a map storage device in which a map is stored, a current position detecting device for detecting a current position of the movable body, a locus storage memory for storing therein a locus of the movable body provided by successively detected ones of the current position, a display unit having a screen, and a switching device for the switching between a mode in which the map from the map storage device, a current position and a locus of the movable body from the current position detecting device and the locus storage device are displayed on the screen and a second mode in which the map and the current position are displayed on the screen but the locus is not displayed on the screen. The navigation system further has a function of causing a locus to be displayed on the screen in accordance with a scale of a map displayed on the screen.
REFERENCES:
patent: 4532514 (1985-07-01), Hatano et al.
patent: 4535335 (1985-08-01), Tagami et al.
patent: 4963865 (1990-10-01), Ichikawa et al.
Akamatsu Teruki
Goto Hirofumi
Hayami Katsuro
Hirasa Yoshiaki
Naito Norihiro
Blum Theodore M.
Mazda Motor Corporation
Mitsubishi Denki & Kabushiki Kaisha
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