Patent ID: 6978209
Filing Date: 2005-12-20
Classification: G01C,H04M,H04W,Y02D

Abstract:
1. A navigation system comprising: a mobile terminal including a position detector to acquire position information of a current position of the mobile terminal, an input interface for receiving position information of a desired destination, and a display for displaying the map information; a navigation server connected to the mobile terminal through a communication network, the navigation server including an information database for storing the map information and a map information provider which reads map information from the information database according to the position information, the map information including a route calculated according to the current position, the destination, a relay point; and a controller coupled to the server and the display to turn on and off the display of map information based upon distance between at least one of the current position and the destination, and the current position and the relay point wherein the controller controls the storage and the display so as to display at least a portion of the map information when a distance “r” from one of the current position to the destination or the current position to the relay point is no greater than a preset distance “R”, and not to display the map information when the distance “r” is larger than the preset distance “R”, and wherein the controller controls the position detector to acquire position information of the current position after a lapse of a calculated time “t” to reach the destination or the relay point from the current position less a preset time “Δt”, to compare after the lapse the distance “r” from one of the current position to the destination or the current position to the relay point with the preset distance “R.”