Navigation system for vehicle
First Claim
1. A navigation system for a vehicle, comprising:
- a communication unit connected to a server for delivering a map information;
a map gaining unit connected to the communication unit thereby to gain the map information from the server through the communication unit;
a display unit connected to the map gaining unit thereby to display the map information gained by the map gaining unit, in the form of a map image;
a position detecting unit for detecting the position of the vehicle;
a renewal time calculating unit for calculating a renewal time necessary to renew the map, the renewal time including a time for gaining the map information;
a moving distance calculating unit for calculating a moving distance of the vehicle traveling during the renewal of the map;
a road distance calculating unit for calculating a road distance required for the vehicle to travel from its present position to a margin of the map displayed on the display unit;
a comparing unit for comparing the road distance with the moving distance; and
an extraction-area setting unit for establishing the area of a new map to be displayed next to the map presently displayed on the display unit when the road distance agrees with the moving distance;
wherein the map gaining unit transmits information about the area of the new map established by the extraction-area setting unit, to the server through the communication unit and further gains a new map information from the server thereby to carry out the renewal of the map displayed on the display unit.
1 Assignment
0 Petitions
Accused Products
Abstract
A navigation system 2 includes a map-gain timing judging part 15 to calculate a traveling speed the position of a vehicle detected by a GPS unit 13. A moving distance of the vehicle during the renewal of map is calculated by the traveling speed and a renewal time necessary for gaining the map information from the server 11 of a map information delivery apparatus 1. The system 2 further calculates a traveling direction of the vehicle by the position of the vehicle and also calculates a road distance from the present position of the vehicle to the margin of a map on display. When the road distance agrees with moving distance, it is started to gain a new map information from the server. Thus, when the vehicle reaches the margin of the map on display, the renewal of the map information is completed.
-
Citations
13 Claims
-
1. A navigation system for a vehicle, comprising:
-
a communication unit connected to a server for delivering a map information;
a map gaining unit connected to the communication unit thereby to gain the map information from the server through the communication unit;
a display unit connected to the map gaining unit thereby to display the map information gained by the map gaining unit, in the form of a map image;
a position detecting unit for detecting the position of the vehicle;
a renewal time calculating unit for calculating a renewal time necessary to renew the map, the renewal time including a time for gaining the map information;
a moving distance calculating unit for calculating a moving distance of the vehicle traveling during the renewal of the map;
a road distance calculating unit for calculating a road distance required for the vehicle to travel from its present position to a margin of the map displayed on the display unit;
a comparing unit for comparing the road distance with the moving distance; and
an extraction-area setting unit for establishing the area of a new map to be displayed next to the map presently displayed on the display unit when the road distance agrees with the moving distance;
wherein the map gaining unit transmits information about the area of the new map established by the extraction-area setting unit, to the server through the communication unit and further gains a new map information from the server thereby to carry out the renewal of the map displayed on the display unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A navigation system for a vehicle, comprising:
-
communication means for communicating the navigation system with a server for delivering a map information;
map gaining means for gaining the map information from the server;
a display unit for displaying the map information gained by the map gaining means, in the form of a map image;
means for detecting the position of the vehicle;
means for calculating a renewal time necessary to renew the map, the renewal time including a time for gaining the map information;
means for calculating a moving distance of the vehicle traveling during the renewal of the map;
means for calculating a road distance required for the vehicle to travel from its present position to a margin of the map displayed on the display unit;
means for comparing the road distance with the moving distance; and
extraction-area setting means for establishing the area of a new map to be displayed next to the map presently displayed on the display unit when the road distance agrees with the moving distance;
wherein the map gaining means transmits information about the area of the new map established by the extraction-area setting unit, to the server through the communication means and further gains a new map information from the server thereby to carry out the renewal of the map displayed on the display unit.
-
Specification