Navigation system
First Claim
1. A navigation system comprising:
- a main navigation apparatus, which is fixed to a vehicle and run by a vehicle electric source, including;
a main display;
main storage means for storing various kinds of information including map information; and
a main navigation unit for calculating current position data of the vehicle and outputting the calculated current position data to said main display together with the map information; and
a sub-navigation apparatus, which is detachable from the vehicle, including;
information output means for outputting information;
sub-storage means to which information is written;
an electric source for exclusive use by said sub-navigation apparatus; and
a sub-navigation unit for providing current position data via said information output means,wherein operation switches used for operating said sub-navigation unit are integrally provided to said sub-navigation apparatus.
1 Assignment
0 Petitions
Accused Products
Abstract
A combination of a main navigation apparatus 2 which is fixed to the vehicle and a sub-navigation apparatus 3 which is detachable from the vehicle. When the sub-navigation apparatus 3 is attached, map information and current position information is displayed on a main display 25 under control of a sub-control unit 1, and state of the vehicle is displayed on a sub-display 33. When detaching the sub-navigation apparatus 3 from the vehicle, area map information necessary for waking outside of the vehicle is transmitted from an on-vehicle database 22 to a RAM 32. When the sub-navigation apparatus is detached from the vehicle, if the operation switch 36 is turned on, either the sub-display 33 or a speaker 34 is operated by an sub-navigation unit in a saving power control mode in which either the sub-display 33 or the speaker 34 is operated only for a predetermined period of time since the operation switch 36 is turned on. When information stored in the RAM 32 is not insufficient, additional information is transmitted form the on-vehicle database 22 via a telephone terminal 37.
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Citations
18 Claims
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1. A navigation system comprising:
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a main navigation apparatus, which is fixed to a vehicle and run by a vehicle electric source, including; a main display; main storage means for storing various kinds of information including map information; and a main navigation unit for calculating current position data of the vehicle and outputting the calculated current position data to said main display together with the map information; and a sub-navigation apparatus, which is detachable from the vehicle, including; information output means for outputting information; sub-storage means to which information is written; an electric source for exclusive use by said sub-navigation apparatus; and a sub-navigation unit for providing current position data via said information output means, wherein operation switches used for operating said sub-navigation unit are integrally provided to said sub-navigation apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A portable navigation apparatus which is detachable from a vehicle comprising:
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an electric source for exclusive use by the portable navigation apparatus; information output means; storage means, capable of being rewritten, for storing map information; a navigation unit for controlling said information output means to provide at least current position information; and operation switches used for operating said navigation unit, wherein said navigation unit is connected to a vehicle electric source when said portable navigation apparatus is attached to the vehicle and connected to said exclusive electric source when said portable navigation apparatus is detached from the vehicle, and said navigation unit starts controlling said information output means after the portable navigation apparatus is moved to an energy saving mode in which control load on said information output means is reduced. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A portable navigation apparatus which is detachable from a vehicle comprising:
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an electric source for exclusive use by the portable navigation apparatus; information output means; storage means, capable of being rewritten, for storing map information; a navigation unit for controlling said information output means to provide at least current position information; and operation switches used for operating said navigation unit, wherein said navigation unit is connected to a vehicle electric source when said portable navigation apparatus is attached to the vehicle and connected to said exclusive electric source which is isolated from the vehicle electric source when said portable navigation apparatus is detached from the vehicle, and said navigation unit starts controlling said information output means after the portable navigation apparatus is moved to an energy saving mode in which power consumption from said exclusive electric source is limited. - View Dependent Claims (17, 18)
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Specification