Data terminal device
First Claim
Patent Images
1. A data terminal device comprising:
- a position data receiving part for receiving position data transmitted from an artificial satellite;
a wireless part for transmitting and receiving data with respect to a base station;
a detailed map data memory part for storing detailed map data received by the wireless unit;
a scale determining part for determining the scale of the road map according to a plurality of position data received a plurality of times by the position data receiving part; and
a display part for displaying the road map of the scale determined by the scale determining part and detailed map data stored in the memory part; and
a moving direction determining part for determining the moving direction based on the position data received a plurality of times by the wireless part; and
in which the wireless part receives detailed map data only with respect to the moving direction determined by the moving direction determining part.
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Accused Products
Abstract
A position data receiving part receives position data transmitted from an artificial satellite. A wireless unit transmits and receives data with respect to a base station. A detailed map data memory part stores detailed map data received by the wireless part. Scale determining part determines the scale of the road map according to a plurality of position data received a plurality of times by the position data receiving part. A display part displays the road map of the scale determined by the scale determining part and detailed map data stored in the memory part.
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Citations
18 Claims
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1. A data terminal device comprising:
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a position data receiving part for receiving position data transmitted from an artificial satellite; a wireless part for transmitting and receiving data with respect to a base station; a detailed map data memory part for storing detailed map data received by the wireless unit; a scale determining part for determining the scale of the road map according to a plurality of position data received a plurality of times by the position data receiving part; and a display part for displaying the road map of the scale determined by the scale determining part and detailed map data stored in the memory part; and a moving direction determining part for determining the moving direction based on the position data received a plurality of times by the wireless part; and
in which the wireless part receives detailed map data only with respect to the moving direction determined by the moving direction determining part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. A data terminal device comprising:
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a position data receiving part for receiving position data transmitted from an artificial satellite; a wireless part for transmitting and receiving data with respect to a base station; a detailed map data memory part for storing detailed map data received by the wireless unit; a scale determining part for determining the scale of the road map according to a plurality of position data received a plurality of times by the position data receiving part; and a display part for displaying the road map of the scale determined by the scale determining part and detailed map data stored in the memory part; and a route determining part for executing route guide display by determining the route from the present position to a desired spot; and
in which the wireless part receives detailed map data only in the moving direction of the route determined by the route determining part. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification