Navigation device with power saving mechanism and method...

Details Navigation device with power saving mechanism and method... Navigation device with power saving mechanism and method...

2008-03-31

2010-12-28

Jeanglaud, Gertrude Arthur (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S033000, C701S201000, C701S215000, C342S357440, C342S357740

Reexamination Certificate

active

07860650

ABSTRACT:
A navigation device with power saving mechanism and method thereof are provided. The navigation device includes a global positioning system (GPS) receiver, a first processing unit, a second processing unit and a sound playing unit. The GPS receiver produces a longitude-latitude information by receiving a satellite signal from the GPS. The first processing unit switches from a first mode to a second mode according to a control signal. Then, the first processing unit is disabled after switching. When the second processing unit is enabled, a direction information and a distance information are generated by comparing the longitude-latitude information with a destination information. The sound playing unit selects two frequencies among a plurality of navigation frequencies according to the direction information and the distance information, and plays the tone signals which are comprised of the two frequencies in sequence.

REFERENCES:
patent: 6285315 (2001-09-01), Pratt
patent: 7266615 (2007-09-01), Yoneya et al.

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