Patent ID: 7977871

Claim:
An organic electroluminescent device comprising: a substrate having a plurality of thin film transistors; a first insulating layer having an uneven pattern formed on the substrate; a first electrode formed on a first predetermined portion of the first insulating layer; a second insulating layer formed on a second predetermined portion of the first insulating layer; a counter electrode that overlaps the second insulating layer; an electroluminescent layer formed on the first electrode; and a second electrode formed on the electroluminescent layer, wherein the counter electrode partially overlaps a semiconductor layer of one of the thin film transistors, the first electrode is coupled to an electrode of the corresponding thin film transistor through a contact hole formed in the first insulating layer having the uneven pattern, and the uneven pattern of the first insulating layer has a curved shape, wherein a first coupling area between the first electrode and the electrode of the thin film transistor overlaps a second coupling area between the semiconductor layer and the electrode of the thin film transistor.