Organic electro luminescence display including an insulating layer having contact holes in a region where a power line overlaps an electrode

An organic electro luminescence display, comprising:

• a pixel portion on which a plurality of pixels are arranged with a first electrode, a second electrode, and an organic thin film layer interposed between the first electrode and the second electrode;
• a first power line supplying a first level voltage to the pixels of the pixel portion;
• a second power line having at least a region overlapped with the second electrode to supply a second level voltage to the second electrode,
• an insulating layer having a plurality of contact holes in the region where the second power line is overlapped with the second electrode,
• wherein the second power line is arranged on at least one side of the pixel portion, and
• wherein the second power line includes a plurality of auxiliary power lines to supply the second level voltage to the second power line.

An organic electro luminescence display, comprising:

• a pixel portion on which a plurality of pixels are arranged with a first electrode, a second electrode, and an organic thin film layer interposed between the first electrode and the second electrode;
• a first power line supplying a first level voltage to the pixels of the pixel portion;
• a second power line having at least a region overlapped with the second electrode to supply a second level voltage to the second electrode, the region being arranged outside the pixel portion;
• and
• an insulating layer having a plurality of contact holes in the region where the second power line is overlapped with the second electrode,
• wherein the plurality of contact holes, arranged in a matrix of rows and columns, and coupling the second electrode to the second power line, and
• wherein the insulating layer includes at least two contact holes in the column direction.