US Patent 9406884 Method for making organic light emitting diode array

The disclosure relates to a method of making organic light emitting diode array. A base defining a plurality of convexities is provided. A number of first electrodes are applied on the plurality of convexities. A patterned second insulative layer is made among the convexities to cover first parts of the first electrodes between the convexities and expose second parts of the first electrodes on top surfaces of the convexities to form a number of protrudent portions. A number of electroluminescent layers are transfer printed on the number of protrudent portions to form a number of organic light emitting layers. A second electrode is electrically connected to the number of organic light emitting layers.