Automotive navigation system
First Claim
1. An automotive navigation system comprising a receiving means for receiving data signals related to a present position of a vehicle transmitted from satellites, a first present position detecting means for calculating a present position of the vehicle on the basis of the data signals, a display device for showing the present position of the vehicle on the basis of an output of the present position detecting means, a vehicle speed sensor for detecting a vehicle speed, and a data change limiting means responsive to said vehicle speed sensor for limiting change of the displayed present position of the vehicle displayed at the display device when the vehicle speed is lower than a predetermined speed.
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Accused Products
Abstract
An automotive navigation system has a receiver for receiving data signals on present position of the vehicle transmitted from satellites. A present position detecting system detects the present position of the vehicle on the basis of the data signals. A display device shows the present position of the vehicle on the basis of the output of the present position detecting system. Change of the output of the present position detecting system to be given to the display device is inhibited when the vehicle is at a stop.
69 Citations
9 Claims
- 1. An automotive navigation system comprising a receiving means for receiving data signals related to a present position of a vehicle transmitted from satellites, a first present position detecting means for calculating a present position of the vehicle on the basis of the data signals, a display device for showing the present position of the vehicle on the basis of an output of the present position detecting means, a vehicle speed sensor for detecting a vehicle speed, and a data change limiting means responsive to said vehicle speed sensor for limiting change of the displayed present position of the vehicle displayed at the display device when the vehicle speed is lower than a predetermined speed.
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8. An automotive navigation system comprising a receiving means for receiving data signals related to a present position of the vehicle transmitted from satellites, a present position detecting means for calculating a present position of the vehicle on the basis of the data signals, a display device for showing the present position of the vehicle on the basis of the output of the present position detecting means, a stop sensor for detecting that the vehicle is at a stop, and a data change limiting means responsive to said stop sensor for limiting change of the displayed present position of the vehicle displayed at the display device when the vehicle is at a stop.
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9. An automotive navigation system comprising a receiving means for receiving data signals related to a present position of the vehicle transmitted from satellites, a present position detecting means for calculating a present position of the vehicle on the basis of the data signals, a random access memory which stores data on the present position of the vehicle detected by the present position detecting means under the control of a write command means and reads out the stored data on the present position of the vehicle under the control of a read command means, a display device for showing the present position of the vehicle on the basis of the data read out from the random access memory, a vehicle speed sensor for detecting the vehicle speed, and a data write limiting means which controls said write command means not to cause the data on the present position to be stored in the random access memory when the vehicle speed is lower than a predetermined speed.
Specification