Road navigation system
First Claim
1. A road navigation system comprising:
- a plurality of guidance information transmitter means disposed along a route, each transmitter means generating current location information in the form of extremely low powered signals so as to effect a transmission of said current location information within a relatively small area; and
guidance signal generator means mounted on a vehicle for information for a driver, said guidance providing guidance signal generator means comprising;
receiver means for receiving said current location information from said guidance information transmitter means;
input means allowing said driver to input destination information;
memory means for storing available map information and the inputted destination information;
data processor means for comparing said map information and said destination information which have been stored in said memory means with said current location information when received, and for producing guidance information representative of route information to be traced from the current point to the destination; and
output means for communicating said route information to said driver.
1 Assignment
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Accused Products
Abstract
A road navigation system comprises a plurality of guidance information transmitter systems disposed along a route, each transmitter system generating current location information in the form of extremely-low-powered electric waves, and a guidance signal generator system for providing guidance information for the benefit of a user. The guidance signal generator system comprises a receiver unit for receiving the current location information from the guidance information transmitter system, an input unit for inputting destination information, a memory unit for storing available map information and the inputted destination information which can be prepared as route information to be traced, a data processor unit for comparing the route information with the current location information received by the receiver unit and for producing the guidance information, and an output unit for communicating the guidance information to the user. The guidance signal generator system can provide the user with accurate guidance information within a relatively small area covered by the low-powered electric waves from the transmitter system.
142 Citations
8 Claims
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1. A road navigation system comprising:
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a plurality of guidance information transmitter means disposed along a route, each transmitter means generating current location information in the form of extremely low powered signals so as to effect a transmission of said current location information within a relatively small area; and guidance signal generator means mounted on a vehicle for information for a driver, said guidance providing guidance signal generator means comprising; receiver means for receiving said current location information from said guidance information transmitter means; input means allowing said driver to input destination information; memory means for storing available map information and the inputted destination information; data processor means for comparing said map information and said destination information which have been stored in said memory means with said current location information when received, and for producing guidance information representative of route information to be traced from the current point to the destination; and output means for communicating said route information to said driver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification