Indoor navigation method and system using illumination lamps

A terminal for performing a navigation service, the terminal comprising:

• a display unit for displaying display contents under a control of a controller;
• a storage unit for storing data required to operate the terminal;
• an input unit for receiving a user's input and delivering the user's input to the controller;
• an optical communication unit, which is comprised of a light receiving device and receives an optical signal from a Light Emitting Diode (LED) spot;
• and
• the controller for controlling each component of the terminal, receiving map information and an IDentification (ID) of an information spot from the information spot connected to a map server, determining a current position of the terminal, displaying the map information and the current position, calculating and displaying an optimal path from the current position to a destination by using the map information when the destination is input by the user, re-determining a current position of the terminal when an ID of a general spot is received from a general spot, and updating the optimal path and displaying the updated optimal path from the re-determined current position to the destination.

A navigation system comprising:

• a map server for storing map information and additional information of an area for which a navigation service is provided;
• a plurality of LED spots, which are connected to the map server and output information delivered from the map server and their IDentification (ID) information as an optical signal;
• and
• a mobile terminal for receiving the optical signal including the map information and the ID information from one or more of the plurality of LED spots, perceiving a current position of the mobile terminal, and calculating and displaying an optimal path from the current position to a destination.