Patent ID: 7471955

Claim:
A mobile terminal device having a route guiding function of guiding along a route by obtaining map information from a server system via a radio communication network, comprising: a position detecting unit which detects a current position of the mobile terminal device; a bearing detecting unit which detects a first bearing to which the mobile terminal device is directed; a map information acquiring unit which transmits predetermined specific information to identify a destination and positional information of a current position to the server system, and acquires map information on a section containing the destination and the current position from the server system; a target bearing calculating unit which calculates a second bearing from a current position to the destination based on the positional information and the predetermined specific information; a judging unit that judges whether a difference between the first bearing and the second bearing is less than or greater than a predetermined value, or is equal to the predetermined value; a displaying unit which displays a map based on the map information acquired from said map information acquiring unit, displays predetermined icon images at a position of the destination and the current position respectively, and displays an icon image indicating the first bearing; and a target capturing unit which produces a first melody when the judging unit judges that the difference is less than the predetermined value, produces no melody when the judging unit judges that the difference is greater than the predetermined value, and produces a second melody when the judging unit judges that the difference is equal to the predetermined value.