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Navigation device, information supplying server and information service system using the same

  • US 20040204826A1
  • Filed: 03/16/2004
  • Published: 10/14/2004
  • Est. Priority Date: 04/08/2003
  • Status: Active Grant
First Claim
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1. A navigation device having navigation means for making guidance to a set destination, the navigation device including information service means for supplying a user with information, wherein the information service means 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;

    operation means that provides an instruction of displaying the user service information;

    determination means that determines, in response to the instruction provided by the operation means, 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;

    communications means 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 means;

    update means 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 means; and

    display means that displays the user service information in the storage part updated by the update means.

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