Patent ID: 8441212

Claim:
A system for driving light emitting devices, comprising: a main light emitting device comprising a first communication unit for exchanging information with a central monitoring server and a close sub-light emitting device using a wireless communication module, a first light emitting unit having at least one light emitting element, and a first control unit for controlling light emission of the first light emitting unit based on command signals received from the central monitoring server, and transmitting a command signal for controlling the sub-light emitting device, which belongs to the command signals received from the central monitoring server, to the sub-light emitting device through the first communication unit; and at least one sub-light emitting device comprises a second communication unit for exchanging information with the main light emitting device, a second light emitting unit having at least one light emitting element, and a second control unit for controlling light emission of the second light emitting unit based on the command signal received from the main light emitting unit, wherein the main light emitting device comprises a first sensing unit for sensing the status information of the first light emitting unit, and the sub-light emitting device comprises a second sensing unit for sensing the status information of the second light emitting unit; and the main light emitting device transmits the status information of the first light emitting unit sensed by the first sensing unit and/or the status information of the second light emitting unit sensed by the second sensing unit and received from the sub-light emitting device to the central monitoring server through the first communication unit, and wherein the status information includes information about a battery mounted in each of the main light emitting device and the sub-light emitting device, lifetime information of the first and second light emitting units, and status information of the second communication unit included in the sub-light emitting device.