Patent ID: 7184884
Filing Date: 2007-02-27
Classification: G01C,G08G

Abstract:
1. A navigation device for making guidance to a set destination, the navigation device including an information service device for supplying a user with information, the information service device comprising: a storage part that stores user service information including fixed information which is updated at intervals of a predetermined period and update information which is updated at intervals of a period shorter than the predetermined period; an operation device that provides an instruction of displaying the user service information; a determination device that determines, in response to the instruction provided by the operation device, on each of the fixed information and the update information whether or not the user service information stored in the storage part is the newest; a communications device that acquires, from outside, newest information corresponding to at least one of the fixed information and the update information which are determined to be not the newest by the determination device; an update device that updates the user service information in the storage part by use of at least one of the fixed information and the update information which are acquired by the communication device; and a display that displays the user service information in the storage part updated by the update device.