Dual-side organic light emitting display device

A dual-side organic light emitting display device, comprising:

• a first transparent substrate including a pixel region, the pixel region including a first region and a second region;
• a first driving element and a second driving element positioned in the first region and over the first transparent substrate;
• a first organic light emitting diode positioned in the second region and over the first and second driving elements, the first organic light emitting diode including a first electrode connected to the first driving element, a second electrode disposed over the first electrode and facing the first electrode, and a first organic light emitting layer between the first and second electrodes, wherein the second electrode is a cathode for the first organic light emitting diode;
• and
• a second organic light emitting diode positioned in the first and second regions and on the first organic light emitting diode, the second organic light emitting diode including a third electrode disposed over the second electrode and facing the second electrode, and connected to the second driving element and a second organic light emitting layer between the second and third electrodes, wherein the second electrode is a cathode for the second organic light emitting diode, and wherein the second electrode is positioned between the first transparent substrate and the third electrode,
• wherein a first light from the first organic light emitting diode is emitted toward a first direction through the first electrode, and a second light from the second organic light emitting diode is emitted toward a second direction through the third electrode, and
• wherein the second direction is opposite to the first direction.