Time display control device, navigation device, method for controlling time displayed, and program

A navigation device comprising:

• a self-position detecting unit configured to detect a self-position;
• a time calculating unit configured to calculate time of a self-position time zone where the self-position detected using the self-position detection unit exists;
• a time display unit configured to display the time calculated using the time calculating unit;
• a destination setting unit configured to set a destination;
• a route search unit configured to search a route from a start point to the destination set using the destination setting unit;
• and
• a display control unit configured to cause the time display unit to display time of a destination time zone where the destination exists continually until arriving at the destination when determining that the self-position moves beyond the boundary and when the route searched using the route search unit intersects a boundary between a start time zone where the start point exists and an adjacent time zone adjacent to the start time zone for a plurality of times.

A method for controlling time displayed on a display device, the method comprising:

• detecting a self-position;
• calculating time of a first time zone where the self-position exists;
• calculating time of a second time zone adjacent to the first time zone;
• determining whether the self-position moves into the second time zone;
• displaying time of the first time zone continually in an area in the second time zone in response to determination that the self-position moves into the second time zone, the area having a predetermined width from a boundary between the first time zone and the second time zone;
• and
• displaying time of the second time zone in response to determination that the self-position moves out of the area into an other area in the second time zone.

A method for controlling time displayed on a display device, the method comprising:

• searching a route from a start point to a destination;
• determining whether the route intersects a boundary between a start time zone where the start point exists and an adjacent time zone adjacent to the start time zone for a plurality of times;
• detecting a self-position;
• determining whether the self-position moves beyond the boundary;
• calculating time of the start time zone;
• calculating time of a destination time zone where the destination exists;
• displaying time of the start time zone before determination that the self-position moves beyond the boundary;
• and
• displaying time of the destination time zone continually until arriving at the destination in response to determination that:
• the self-position moves beyond the boundary;
• and
• the route intersects the boundary for a plurality of times.