초록 ▼

A navigation system is provided for offering navigational assistance to a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination data base includes destin

A navigation system is provided for offering navigational assistance to a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination data base includes destination related information preferably stored on an interfacable memory card and contains menu categories and subcategories for classifying destinations and text information. The memory card may include a user modifiable data base. Data information is provided with a data identification code which is required to match the user identification code assigned to a given system for authorized access thereto. Such data could be provided for a period of time set to expire. User selectable menu controls enable the user to sequence through the menu of categories and destinations and select a desired destination. A processor compares the current position coordinates with the position coordinates of the selected destination and determines a distance and a straight-line direction from the current position to the selected destination. A display displays the distance and a direction pointing indicator for showing the direction from the current position to the selected destination. In one embodiment, the navigation system is integrated with an audio entertainment system and shares a common display and housing.

대표청구항 ▼

[ What is claimed is:] [1.] A navigation system with authorization access control for accessing navigation information, said system comprising:a housing having a global positioning system (GPS) receiver which normally operates on a first set of predetermined destination navigation data;a memory in t

[ What is claimed is:] [1.] A navigation system with authorization access control for accessing navigation information, said system comprising:a housing having a global positioning system (GPS) receiver which normally operates on a first set of predetermined destination navigation data;a memory in the housing for storing a user identification code assigned to the navigation system from a pool of possible user identification codes so that different navigation systems contain different user identification codes;a data carrier having a second set of navigation data stored therein, said second set of navigation data being different from the first set and being capable of being used by the GPS receiver to provide additional navigation information for the system, said data carrier also having an identification code stored therein; andprocessor means in the housing for comparing the identification code of the data carrier with the user identification code of the navigation system and allowing access by said processor to the second set of navigation data on the data carrier when the data identification code matches the user identification code wherein said GPS receiver receives GPS position signals and determines position coordinates therefrom, said GPS receiver further determining a time-related information, said time-related information being compared with a preprogrammed period of time to control access to the second set of navigational data on the data carrier.