Patent ID: 8694252

Claim:
A personal navigation device which provides a portable electronic map, comprising: a navigation console comprising: a verification module; a receiver module for receiving a location signal associated with a current location of the personal navigation device; a processor configured to provide a navigation instruction according to the location signal and a destination inputted by a user and configured to acquire a detailed map which depicts a predetermined area around the destination after receiving a print command; and a display module for displaying the navigation instruction; and a peripheral device connected to the navigation console and comprising: a storage unit for storing a chip code; a connecting module; and a screen for displaying the detailed map without external power supply when the peripheral device is disconnected from the navigation console; wherein the verification module is configured to access the chip code when the peripheral device is attached to the navigation console, verify the accessed chip code with a built-in identification code of the navigation console, and allow the navigation console to be enabled if the accessed chip code matches the built-in identification code.