Display apparatus and method of detecting short-circuit failure of the display apparatus

An organic light-emitting diode (OLED) display apparatus comprising:

• a plurality of unit pixels each comprising a plurality of sub pixels, wherein each sub pixel comprises:
• a first electrode,
• a second electrode, and
• an organic electroluminescent layer between the first electrode and the second electrode;
• a plurality of scan wires;
• a plurality of scan lines branching off from each of the scan wires and extending in a first direction, the number of scan lines from each scan wire equaling the number of sub pixels for each pixel, wherein each scan line connects one of the scan wires with one of the sub pixels of each of a plurality of unit pixels;
• a plurality of data lines extending in a second direction orthogonal to the first direction and connected to the plurality of sub pixels;
• a plurality of first power supply lines extending in the second direction and connected to the sub pixels;
• a plurality of second power supply lines extending in the first direction and directly connected to the first power supply line, wherein the unit pixels are arranged in a plurality of rows and wherein the second power supply lines are interleaved with the rows of unit pixels;
• and
• a plurality of test pads, each connected to the scan lines of one of the scan wires,
• wherein the scan lines, the data lines, the first power supply line, and the second power supply lines do not overlap the first electrode.

A method of detecting a short-circuit failure of a display apparatus comprising:

• a plurality of unit pixels each comprising a plurality of sub pixels;
• a plurality of scan wires;
• a plurality of scan lines branching off from each of the scan wires and extending in a first direction, the number of scan lines from each scan wire equaling the number of sub pixels for each pixel, wherein each scan line connects one of the scan wires with one of the sub pixels of each of a plurality of unit pixels;
• a plurality of data lines extending in a second direction orthogonal to the first direction and connected to the plurality of sub pixels;
• a plurality of first power supply lines extending in the second direction and connected to the sub pixels;
• and
• a plurality of test pads, each connected to the scan lines of one of the scan wires,
• wherein the method comprises:
• detecting a waveform for each of the scan lines of one of the scan wires by scanning the test pad connected to the scan lines of the one scan wire;
• and
• detecting a defective scan line by comparing the detected waveforms with one or more previously determined defective waveforms.