Organic electro luminescence display (OELD) to perform sheet unit test and testing method using the OELD

A motherboard of an Organic Electro Luminescence Display (OELD), comprising:

• a plurality of OELDs each including:
• a pixel unit having a plurality of pixels to receive a first power supply voltage, a second power supply voltage, scanning signals and test signals and to emit light;
• a scan driving unit to supply the scanning signals to the pixel unit;
• a test unit to supply the test signals to the pixel unit by data lines;
• and
• a data distribution unit to supply the test signals connected between the test unit and the data lines to a plurality of the data lines, the test signals connected between the test unit and the data lines being supplied to output lines of separate test units;
• a first wire group connected to OELDs of the plurality of the OELDs aligned in a first direction;
• and
• a second wire group connected to OELDs of the plurality of the OELDs aligned in a second direction which crosses the first direction;
• wherein at least one of the first and the second wire groups supplies predetermined test signals and predetermined power supply voltages to self-connected separate OELDs.