Navigation device for receiving satellite broadcast distribution of map data

• US 20030069691A1
• Filed: 10/09/2001
• Published: 04/10/2003
• Est. Priority Date: 10/09/2001
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Schroeder, Daryl D.
• Granted Patent: US 6,694,253 B2
• Time in Patent Office: Days
• US Class Current: 701/213
• CPC Class Codes: G01C 21/30 Map- or contour-matching

Abstract

A navigation device having a satellite broadcast receiver for receiving a broadcast transmission of map data for use in the navigation device. The navigation device also includes a location determining device such as a global positioning system receiver to determine a geographic location of the navigation device. The location of the device is compared with the received map data, and if there is a match, the map data is stored in a computer storage medium and displayed on a screen.

Claims

1. A navigation device comprising:

a central processing unit;

a computer storage medium in communication with the central processing unit; and

a satellite broadcast receiver in communication with the central processing unit and with the computer storage medium, wherein the receiver receives broadcast map data;

wherein the broadcast map data is adapted for storage in the computer storage medium.

2. The navigation device of claim 1 further comprising a global positioning system receiver in communication with the central processing unit, wherein the global positioning system receiver determines a location of the navigation device.

3. The navigation device of claim 2 wherein the broadcast map data is stored in the computer storage medium as a function of the location of the navigation device.

4. The navigation device of claim 2 further comprising a display in communication with the central processing unit, wherein the display displays a map image corresponding with the broadcast map data.

5. The navigation device of claim 4 further comprising a vehicle coupled with the navigation device, wherein the central processing unit is operable to present a map image on the display corresponding with the location of the vehicle.

6. The navigation device of claim 1 further comprising a direction sensor in communication with the central processing unit, wherein the sensor determines a travel heading of the navigation device.

7. The navigation device of claim 6 wherein the map data is stored in the computer storage medium as a function of the travel heading of the navigation device.

8. The navigation device of claim 1 further comprising a buffer memory connected with the satellite broadcast receiver, wherein the buffer memory temporarily stores the broadcast map data.

9. A method of providing map data to a navigation device comprising:

receiving a broadcast transmission including map data corresponding with a first geographic location; and

storing the map data in a computer storage medium.

10. The method of claim 9 further comprising:

determining a second geographic location corresponding with the first geographic location of the navigation device; and

comparing the first geographic location to the second geographic location.

11. The method of claim 10 wherein the operation of determining a second geographic location includes receiving a global positioning satellite signal.

12. The method of claim 11 further including the operation of displaying a map image corresponding with the map data.

13. The method of claim 9 wherein the map data is in a bit-map format.

14. The method of claim 9 wherein the map data is in vector graphic format.

15. The method of claim 9 wherein the map data is in a rastor graphic format.

16. The method of claim 9 wherein the map data is in a geographic information system format.

17. The method of claim 9 further including the operation of determining a direction of travel for the navigation device.

18. The method of claim 17 further including the operations of:

comparing the first geographic location with the direction of travel of the navigation device; and

storing the map data in the computer storage medium.

19. The method of claim 10 wherein the first geographical location includes a first latitude component and a first longitude component, and the second geographic location includes a second latitude component and a second longitude component.

20. A navigation device comprising:

means for receiving a satellite broadcast transmission of map data;

means for receiving a global positioning satellite transmission to determine a location of the navigation device;

means for storing the map data; and

means for displaying the map data.