Organic light emitting diode display including a sealant auxiliary structure and method of manufacturing the same

A method of manufacturing an OLED display device, the method comprising:

• preparing a first mother board comprising a plurality of OLEDs;
• forming a plurality of sealants that enclose a plurality of OLEDs, respectively, a plurality of sealant contraction reinforcement auxiliary structures that are positioned between the sealant and the second mother board, and a dummy structure that is adjacent to the sealant and that has the same height as that of the sealant on the second mother board;
• cohering the first mother board and the second mother board using the plurality of sealants so that the plurality of sealants enclose the plurality of OLEDs, respectively;
• curing the sealant;
• and
• cutting the first mother board and the second mother board along the outer side of the sealant,
• wherein a thermal expansion coefficient of the sealant contraction reinforcement auxiliary structure is less than a thermal expansion coefficient of the sealant,
• wherein the thermal expansion coefficient of the sealant contraction reinforcement auxiliary structure is between about 40×10−6/K, to about 65×10−6/K.