Infinitely expandable display apparatus based on electroluminescent display type and driving method thereof

An infinitely expandable display apparatus comprising:

• a cabinet including a plurality of display units each having an application specific integrated circuit embedded therein;
• a set board generating a driving command signal for driving of the cabinet;
• and
• a set interface circuit connecting the set board to the cabinet,
• wherein
• the plurality of display units are connected to one another through a unidirectional interface circuit, and at least one of the plurality of display units transfers the driving command signal and an execution result signal based thereon to a neighbor display unit of the plurality of display units on the basis of a cascading scheme,
• the set board transfers the driving command signal to a first display unit of the plurality of display units based on the cascading scheme through a first communication line included in the set interface circuit, and
• a last display unit of the plurality of display units based on the cascading scheme transfers the execution result signal to the set board through a second communication line included in the set interface circuit.