Mobile map display apparatus, map display system and map...

Details Mobile map display apparatus, map display system and map... Mobile map display apparatus, map display system and map...

2011-03-22

2011-03-22

Beaulieu, Yonel (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S207000

Reexamination Certificate

active

07912640

ABSTRACT:
A mobile map display apparatus provided with a geomagnetic sensor for detecting earth-magnetism, a display unit, and a control unit able to calculate a geographical bearing based on detection values of the geomagnetic sensor and having a first display processing for display in a direction linked with the calculated bearing when acquiring the map and making the display unit display the map and a second display processing for display fixed to a predetermined bearing. In displaying the map, the control unit makes the display unit perform the display by the second display processing when detecting a drop of precision of the geomagnetic sensor.

REFERENCES:
patent: 7302342 (2007-11-01), Kobayashi et al.
patent: 7471955 (2008-12-01), Muramatsu
patent: 7539574 (2009-05-01), Takashima et al.
patent: 05-113342 (1993-05-01), None
patent: 10-197258 (1998-07-01), None
patent: 2002-328042 (2002-11-01), None
patent: 2004-028837 (2004-01-01), None

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