OPTICAL DEVICE AND ORGANIC ELECTROLUMINESCENT DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To enhance light emission efficiency of an optical device of an organic electroluminescent display device. SOLUTION: The organic electroluminescent display device 1 of this invention comprises: a light-transmissive insulating layer 10, an organic electroluminescent element 40, and a light-extracting layer 30. The organic electroluminescent element 40 comprises: a back electrode 43 disposed on a back side relative to the light-transmissive insulating layer 10; a light-transmissive front electrode 41 interposed between the insulating layer 10 and the back electrode 43; and an organic substance layer 42 interposed between the front electrode 41 and the back electrode 43 and including an light-emitting layer 42a. The light-extracting layer 30 is disposed on an optical path along which light emitted by the light-emitting layer 42a reaches the insulating layer 10 after going out of the organic layer 42. The light-extracting layer 30 comprises a first portion 31 that is a light-transmissive layer having a plurality of holes separated from each other, and a second portion 32 filling the plurality of holes and having an optical property different from that of the first portion 31. The plurality of holes are arranged such that lines connecting centers of the holes make up a nearly regular triangle. COPYRIGHT: (C)2005,JPO&NCIPI