公开(公告)号：US10892435B2

公开(公告)日：2021-01-12

申请号：US16137214

申请日：2018-09-20

Applicant: LG Display Co., Ltd.

Inventor： Dongyoon Lee ,  Inyeong Kong ,  Jongsin Park

IPC: H01L51/52 ,  H01L27/146 ,  H01L27/12

Abstract: An organic light-emitting diode (OLED) display device capable of improving light extraction efficiency and lifetime is disclosed. In the OLED display device, a protective layer having a convex shaped protruding pattern is arranged in a light emitting area at a central portion of a substrate, so that only the light emitting area has a selectively convex protruding shape. Accordingly, in the OLED display device, in a process of forming an organic light emitting layer, the protruding pattern can artificially offset the organic light emitting layer arranged at the central portion of the substrate being sagged, by a protective layer having a convex shaped protruding pattern. As a result, the OLED display device can improve a problem of thickness non-uniformity of the central portion and an edge portion of the substrate due to a sagging phenomenon of the organic light emitting layer.