Navigation system
First Claim
1. A navigation system for providing road guidance by displaying a structure-shape map showing shapes of buildings, facilities, and roads, said navigation system comprising:
- present-position sensing means for sensing a present position;
vehicle speed sensing means for sensing vehicle speed;
storage means containing stored structure-shape map data including shape information representing shapes of structures, said structures including at least roads, facilities and buildings, and information regarding said structures linked to said shape information;
display means for displaying the structure-shape map with the sensed present position indicated thereon, based on the shape information; and
display control means for, in one mode of operation, controlling information displayed as said structure-shape map on said display means in accordance with movement of the sensed present position, restricting the quantity of shape information which is displayed on said display means to shape information for structures within a predefined area around the present position, on the basis of the sensed vehicle speed, for selecting items of said information regarding said roads from said storage means on the basis of the sensed present position, and for drawing, within an area smaller than the displayed structure-shape map, only the selected items of said information regarding said roads overlaid on the respectively related shapes of roads on the displayed structure-shape map.
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Accused Products
Abstract
A navigation system provides road guidance by displaying information relating to roads on a structure shape map, together with landmark information, in such a manner that only information around the present position is highlighted. The system retrieves road information in the direction of travel from the present position according to the vehicle speed, or road information within a predetermined angular or distance range in the direction of travel. Information relating to roads includes information indicating a one-way road, information indicating a road into which entry is prohibited, and information indicating a pedestrian crossing and a railroad crossing. These items of information are displayed by using marks, and the landmark information is displayed by using landmarks, thereby displaying information necessary for travel in a readily perceivable manner according to the travel conditions. When the vehicle enters a parking lot in the middle of the guidance for a route to a destination, the system searches for a route from the parking lot to the destination and outputs the found route by using a structure-shape map. The parking lot in this case is one within a predetermined walking distance from the destination. If the parking lot is in close proximity of the destination, further guidance is not necessary and the guidance is terminated.
295 Citations
36 Claims
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1. A navigation system for providing road guidance by displaying a structure-shape map showing shapes of buildings, facilities, and roads, said navigation system comprising:
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present-position sensing means for sensing a present position; vehicle speed sensing means for sensing vehicle speed; storage means containing stored structure-shape map data including shape information representing shapes of structures, said structures including at least roads, facilities and buildings, and information regarding said structures linked to said shape information; display means for displaying the structure-shape map with the sensed present position indicated thereon, based on the shape information; and display control means for, in one mode of operation, controlling information displayed as said structure-shape map on said display means in accordance with movement of the sensed present position, restricting the quantity of shape information which is displayed on said display means to shape information for structures within a predefined area around the present position, on the basis of the sensed vehicle speed, for selecting items of said information regarding said roads from said storage means on the basis of the sensed present position, and for drawing, within an area smaller than the displayed structure-shape map, only the selected items of said information regarding said roads overlaid on the respectively related shapes of roads on the displayed structure-shape map. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A navigation system for calculating a route to an entered destination and for providing guidance by a display and/or voice according to a present position, said navigation system comprising:
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present-position sensing means for sensing the present position; vehicle speed sensing means for sensing vehicle speed; route calculating means for calculating a route to the entered destination; storage means containing structure-shape map data including shape information representing shapes of structures and landmarks, said structures including at least roads, facilities and buildings, and information regarding said structures linked to said shape information and including guidance information inclusive of landmark information; retrieval means for retrieving, from said storage means, information for said roads; display means for displaying a structure-shape map, with the shapes of structures and landmarks along the calculated route and indication of the sensed present position depicted thereon; and display control means for drawing the shapes of the structures and landmarks based on said stored shape information and in accordance with movement of the sensed present position, for restricting the quantity of shape information which is drawn and displayed on said display means to shape information for structures within a predefined area around the present position, on the basis of the vehicle speed sensed by said vehicle speed sensing means, thus forming the structure-shape map, and for superimposing, within an area smaller than the displayed structure-shape map, only the retrieved road information on the structure-shape map. - View Dependent Claims (23)
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24. A navigation system for providing road guidance by displaying a structure-shape map showing building shapes and roads, said navigation system comprising:
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vehicle speed sensing means for sensing vehicle speed; recording-medium read means for reading out, from a recording medium, structure-shape map data including shape information for shapes of structures including at least roads, facilities and buildings and information relating to the structures linked to the shape information and for reading out a program for displaying the structure-shape map; non-volatile recording means for storing a program; program read means for reading the program read out by said recording-medium read means into said non-volatile recording means; display means for displaying said structure-shape map showing the shape of each of said structures and a detected present position by executing the program read into said non-volatile recording means by said program read means on the basis of the data recorded on said recording medium and in accordance with movement of the detected position; and display control means for restricting the quantity of shape information which is displayed on said display means, to shape information for structures within a predefined area around the present position, on the basis of the vehicle speed sensed by said vehicle speed sensing means, processing means for selecting information relating to a specific road and for overlaying, within an area smaller than the displayed structure-shape map, only the selected road information on the structure-shape map. - View Dependent Claims (25)
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26. A recording medium for a navigation system which provides road guidance by displaying a structure-shape map showing shapes of various structures including buildings, facilities, and roads, with a detected present position shown on said structure-shape map, said recording medium having encoded thereon:
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structure-shape map data including shape data for the shape of each of the various structures; and a program for drawing the shapes of the various buildings, facilities and roads to form the structure-shape map in accordance with movement of the detected present position, for restricting the quantity of shape information which is drawn and displayed on said display means to shape information for structures within a predefined area around the present position, on the basis of a sensed vehicle speed, for selecting information relating to roads, for drawing the selected road-related information on the structure-shape map and for displaying the structure shape map with only the selected road-related information superimposed thereon, within an area smaller than the displayed structure-shape map. - View Dependent Claims (27, 28, 29)
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30. In a navigation system for a vehicle, which searches for a route to a destination and provides route guidance,
a vehicular navigation system having a re-search function, said system comprising: -
a present-position sensing unit for sensing a present position of a vehicle equipped with said navigation system; an information storage device in which map information and other route information necessary for a route search and route guidance have been stored; an input unit for entering a location such as a destination and also entering an instruction to execute a search for a route to said destination from the present position sensed by said present-position sensing unit; an output unit for outputting information for route guidance; and a central processor for executing a search for a route to said destination from said present position on the basis of said map information, temporarily storing the route found by the search, and outputting, to said output unit, a signal for giving route guidance based on said route; wherein, upon detection of entry into a parking lot, said central processor judges a distance from said parking lot to said destination, executes a re-search for a route from said parking lot to said destination, and outputs the route found by said re-search. - View Dependent Claims (31, 32, 33, 34, 35, 36)
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Specification