Electronic navigator for automotive vehicles
First Claim
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1. A navigator for automotive vehicles comprising:
- distance detection means for detecting the running distance of the vehicle;
direction detection means for detecting the running direction of the vehicle;
operation means responsive to detection signals from said distance detection means and said direction detection means for calculating a present position of the vehicle;
display means for electronically displaying a road map and the present position of the vehicle on the road map;
present position display control means for providing a control signal to said display means to display the present position of the vehicle calculated by said operation means;
memory means for storing a first map data for displaying a particular road map and a first scale data indicating a scale of the particular road map, and for storing a second map data indicative of another road map having a scale different from that of the particular road map and a second scale data indicating a scale of said another road map;
alternation means for generating alternation commands to allow said display means to display said another road map instead of the particular road map displayed on said display means;
map display control means for reading the first map data from said memory means to allow said display means to display said particular road map, and responsive to the alternation commands of said alternation means for reading the second map data from said memory means to allow said display means to display said another road map of the different scale instead of the previous road map; and
present position calibration means responsive to the changing operation of the road map of said map display control means for calibrating the present position of the vehicle displayed on said display means in accordance with the first scale data and the second scale data stored in said memory means.
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Abstract
An automotive navigator using a microcomputer displays a car position by a cursor on a road map displayed on a CRT screen. The navigator uses a cassette tape which stores a plurality of road map data and several kinds of reduced map data and expanded map data. It also uses a group of manual switches including a switch for changing the displayed area, a switch for selecting an expanded map or reduced map and a switch for moving the cursor position. Necessary data are displayed on the screen by the state of each switch. A region corresponding to the cursor position is displayed by the expanded map.
74 Citations
5 Claims
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1. A navigator for automotive vehicles comprising:
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distance detection means for detecting the running distance of the vehicle; direction detection means for detecting the running direction of the vehicle; operation means responsive to detection signals from said distance detection means and said direction detection means for calculating a present position of the vehicle; display means for electronically displaying a road map and the present position of the vehicle on the road map; present position display control means for providing a control signal to said display means to display the present position of the vehicle calculated by said operation means; memory means for storing a first map data for displaying a particular road map and a first scale data indicating a scale of the particular road map, and for storing a second map data indicative of another road map having a scale different from that of the particular road map and a second scale data indicating a scale of said another road map; alternation means for generating alternation commands to allow said display means to display said another road map instead of the particular road map displayed on said display means; map display control means for reading the first map data from said memory means to allow said display means to display said particular road map, and responsive to the alternation commands of said alternation means for reading the second map data from said memory means to allow said display means to display said another road map of the different scale instead of the previous road map; and present position calibration means responsive to the changing operation of the road map of said map display control means for calibrating the present position of the vehicle displayed on said display means in accordance with the first scale data and the second scale data stored in said memory means. - View Dependent Claims (2, 3, 4, 5)
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Specification