Emission control system using barcode information

A slave device controlled by a master device, comprising:

• a communication unit;
• an emission unit configured to include at least one light source device;
• an information receiving unit configured to receive emission position information corresponding to previously-set electrical code information from the master device;
• and
• an emission control unit selectively configured to receive an emission control signal corresponding to the emission position information at a position corresponding to the emission position information among emission control signals broadcasted by the master device and control the emission unit on the basis of the received emission control signal.

A master device controlling one or more slave devices through at least one sub-master device, comprising:

• a communication unit;
• an electrical code identification unit configured to identify electrical code information previously output;
• an information check unit configured to check emission position information previously set in accordance with the identified electrical code information and indicating a specific emission position at which a specific slave device among the slave devices emit a light;
• an information providing unit configured to insert the checked emission position information to the specific slave device;
• and
• an emission control unit configured to provide an emission control signal to a first sub-master device through the communication unit so as to selectively control the emission of the specific slave device by controlling a radio wave intensity of the first sub-master device located at a position spaced apart from the specific emission position of the specific slave device.