Vehicle navigation system and method
First Claim
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1. A vehicle navigation system comprising:
- current-location determination means for determining the current location of a vehicle;
input means for inputting a destination and for giving an instruction for executing route searching;
a display unit for displaying an image at an initial scale;
map-information storage means for storing map data including roads to be searched in a route search and minor streets not to be searched in a route search; and
control means for searching for a route from the vehicle location, determined by the current-location determination means, to the destination, input through the input means, based on the roads searched in the route search, wherein the control means determines whether or not the vehicle has entered a minor street, and when the control means determines that the vehicle has entered a minor street, the control means searches for a route from the point of entry into the minor street to the destination using the minor street data and causes the display unit to display the map data at a predetermined scale.
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Abstract
A vehicle navigation system is provided. When route guidance for a vehicle to a destination is performed on the screen of a display unit based on road data for route search, whether or not the vehicle has entered a minor street is determined. When it is determined that the vehicle has entered a minor street, repeat searching for a route leading to the destination is performed by setting the point of entry into the minor street as a new starting point. The screen of the display unit is divided into two screens, and a guidance route is displayed on one of the divided screens based on the result of the repeat searching and road data for minor streets, and the minor street is displayed in a more enlarged form than the other screen.
52 Citations
29 Claims
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1. A vehicle navigation system comprising:
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current-location determination means for determining the current location of a vehicle;
input means for inputting a destination and for giving an instruction for executing route searching;
a display unit for displaying an image at an initial scale;
map-information storage means for storing map data including roads to be searched in a route search and minor streets not to be searched in a route search; and
control means for searching for a route from the vehicle location, determined by the current-location determination means, to the destination, input through the input means, based on the roads searched in the route search, wherein the control means determines whether or not the vehicle has entered a minor street, and when the control means determines that the vehicle has entered a minor street, the control means searches for a route from the point of entry into the minor street to the destination using the minor street data and causes the display unit to display the map data at a predetermined scale. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A vehicle navigation system comprising:
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current-location determination means for determining the current location of a vehicle;
input means for inputting a destination and for giving an instruction for executing route searching;
a display unit for displaying an image;
map-information storage means for storing map data including roads to be searched in a route search and minor streets not to be searched in a route search; and
control means for searching for a route from the vehicle location, determined by the current-location determination means, to the destination, input through the input means, based on the roads searched in the route search, wherein the control means determines whether or not the vehicle has entered a minor street, and when the control means determines that the vehicle has entered a minor street, the control means searches for a route from the point of entry into the minor street to the destination using the minor street data and causes the screen of the display unit to be divided into two screens such that the map data on one of the divided screens is displayed at a predetermined scale. - View Dependent Claims (11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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17. A method of operating a vehicle navigation system comprising:
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storing road data for roads to be searched in an initial search for a guide route;
storing minor street data for streets not searched in an initial search for a guide route;
receiving inputs identifying a first location and a destination;
conducting an initial search and determining a first guide route between the first location and the destination using the road data;
communicating the first guide route to a user;
determining whether the vehicle has deviated from the first guide route and entered a minor street;
conducting a repeat search for a second guide route between the point of entry into the minor street and the destination, where the repeat search uses the road data and the minor street data; and
communicating the second guide route to the user.
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Specification
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Current AssigneeAlpine Electronics Incorporated (Alps Alpine Co., Ltd.)
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Original AssigneeAlpine Electronics Incorporated (Alps Alpine Co., Ltd.)
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InventorsNakamura, Kazuo, Sato, Hiroyuki
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current701/212
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CPC Class CodesG01C 21/3415 Dynamic re-routing, e.g. re...G01C 21/367 Details, e.g. road map scal...G08G 1/0967 Systems involving transmiss...G08G 1/096716 where the received informat...G08G 1/09675 where a selection from the ...G08G 1/096775 where the origin of the inf...G08G 1/096783 where the origin of the inf...
