Self identifying modulated light source

摘要

In one aspect, the present disclosure relates to a self identifying light source including an emitter that produces visible light; and an autonomous modulator in electrical communication with the emitter that automatically and continually modulates the visible light produced by the emitter, wherein the modulated visible light represents an identification code of the light source. In some embodiments, the emitter is a light emitting diode (LED) and further comprising an LED driver that provides a specified voltage and current to each LED in the light source.

主权项

1. A method for determining a position of a mobile device within an area containing a plurality of modulated light beacons, each beacon broadcasting an identification code via modulated light, the method comprising:
receiving from the mobile device approximate location information derived from a signal acquired by the mobile device, the approximate location information not being derived from visible light received by the mobile device; receiving from the mobile device one or more identification codes of modulated light beacons, each identification code being acquired by the mobile device; determining the position of the mobile device based on the approximate location information and the one or more identification codes of the modulated light beacons; and transmitting information related to the position of the mobile device to the mobile device.