Automotive navigation system
First Claim
1. An automotive navigation system comprising:
- a running distance detecting means for detecting the running distance of a vehicle;
a vehicle heading detecting means for detecting the heading of the vehicle;
a display means for enabling a planar display based on the two dimensional Cartesian coordinates system;
a storage means for storing information comprising a geographical name and the positional information thereof for each of a plurality of points;
a character keyboard means including a plurality of character keys respectively assigned a group of unit characters; and
a control means for computing the current position of the vehicle on the basis of the output signals of said running distance detecting means and said vehicle heading detecting means, for retrieving from said storage means one or more geographical names on the basis of the order in which the character keys are activated, for designating from among the retrieved geographical names the geographical name of a departure point and a destination point and reading out their corresponding positional information from said storage means, and for causing said display means to display as marks the departure point, the destination point, and the current position of the vehicle in a reduced scale determined by the departure and destination points at corresponding coordinates on said display means.
1 Assignment
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Accused Products
Abstract
An automotive navigation system wherein a memory included therein has not stored therein a picture information of a map itself but instead has stored therein geographical names and positional information thereof. When the geographical names of a departure point and a destination point are entered through an input unit, a control unit reads out from the memory the geographical names and the positions of the points. A CRT displays marks respectively indicating the departure point, the destination point, and the current position of a vehicle on an adequately reduced scale on the display scope. The arrangement of this automotive navigation system can perform a fully practical navigation function even with a small sized and cheap memory and arithmetic unit.
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Citations
4 Claims
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1. An automotive navigation system comprising:
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a running distance detecting means for detecting the running distance of a vehicle; a vehicle heading detecting means for detecting the heading of the vehicle; a display means for enabling a planar display based on the two dimensional Cartesian coordinates system; a storage means for storing information comprising a geographical name and the positional information thereof for each of a plurality of points; a character keyboard means including a plurality of character keys respectively assigned a group of unit characters; and a control means for computing the current position of the vehicle on the basis of the output signals of said running distance detecting means and said vehicle heading detecting means, for retrieving from said storage means one or more geographical names on the basis of the order in which the character keys are activated, for designating from among the retrieved geographical names the geographical name of a departure point and a destination point and reading out their corresponding positional information from said storage means, and for causing said display means to display as marks the departure point, the destination point, and the current position of the vehicle in a reduced scale determined by the departure and destination points at corresponding coordinates on said display means. - View Dependent Claims (2, 3, 4)
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Specification