Suction unit, method of controlling the same and method of manufacturing display device using the same

A suction unit comprising:

• a suction port connected to an exhaust passage;
• an air blower which forms an airflow to move fumes generated when cutting a target substrate by radiating a laser beam toward the suction port, wherein the air blower is disposed at a lower part of a main body which is close to the suction port between the suction port and an inner space of the main body through which the laser beam is radiated;
• and
• a control unit which controls the air blower in a way such that the fumes are sucked into the suction port in response to a moving speed of the stage unit and a moving direction of the stage unit.

A method of controlling a suction unit, the method comprising:

• simulating an airflow about a suction port, through which fumes generated when a laser beam is radiated on a target substrate on a stage unit to cut the target substrate are sucked up;
• installing an air blower on three or four sides around a laser cutting end at a height close to the suction port;
• and
• controlling on and off of first to fourth solenoid valves of the air blower based on a movement of the stage unit while performing laser cutting on the target substrate while moving the stage unit.