公开(公告)号：US11574985B2

公开(公告)日：2023-02-07

申请号：US17135475

申请日：2020-12-28

Applicant: LG Display Co., Ltd.

Inventor： Youngju Koh ,  Woojung Byun ,  Dongyoon Lee ,  Sungsoo Kim ,  Kwangyong Choi

IPC: H01L27/32 ,  H01L51/52 ,  H01L51/56

Abstract: Provided is an organic light-emitting diode (OLED) display device. The OLED display device includes a substrate in which a pixel area and a non-pixel area are defined, a power line formed on the substrate, at least one insulating film covering the power line, a light-emitting element formed on the insulating film, a connection electrode connected to the power line and formed to extend along an upper surface of the insulating film, and a passivation film having a contact hole through which a portion of the connection electrode is exposed within the non-pixel area. The light-emitting element includes a first electrode, an emissive layer, and a second electrode that are sequentially stacked. The second electrode is in direct contact with the connection electrode within the contact hole.

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.