Patent ID: 8878666
Filing Date: 2014-11-04
Classification: G01C,G01S,G08B,H01K

Abstract:
1. An emergency exit sign having a housing having an opening in front, and a display of semitransparent material installed in the housing such that a front surface of the display is exposed to an external through the opening, the emergency exit sign comprising: a power supply unit for receiving an input of a power source from the external and supplying the power source to an Alternating Current/Direct Current (AC/DC) converter; the AC/DC converter for converting the power source supplied from the power supply unit and supplying a driving power source to an indoor positioning beacon module; the indoor positioning beacon module for periodically wireless transmitting a beacon signal comprising a beacon IDentifier (ID) to the external through a built-in antenna; a Light Emitting Diode (LED) lamp installed within the housing such that the lamp is positioned in rear of the display; and a charger for, when a power source is not supplied from the power supply unit, supplying a driving power source to the indoor positioning beacon module and the LED lamp.