US 11,672,137 B2
Electroluminescent display apparatus
Sungbin Shim, Paju-si (KR); and Suhyeon Kim, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Dec. 24, 2020, as Appl. No. 17/133,941.
Claims priority of application No. 10-2019-0175357 (KR), filed on Dec. 26, 2019.
Prior Publication US 2021/0202882 A1, Jul. 1, 2021
Int. Cl. H10K 50/814 (2023.01); H01L 51/52 (2006.01); G02B 27/01 (2006.01); H01L 27/32 (2006.01); H01L 51/50 (2006.01)
CPC H01L 51/5212 (2013.01) [G02B 27/0172 (2013.01); H01L 27/3248 (2013.01); H01L 27/3258 (2013.01); H01L 51/5044 (2013.01); H01L 51/5275 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electroluminescent display device, comprising:
a substrate having a first sub pixel and a second sub pixel;
an auxiliary layer provided on the substrate, wherein the auxiliary layer includes a first auxiliary layer configured to surround a periphery of the first sub pixel, and a second auxiliary layer configured to surround a periphery of the second sub pixel;
a first electrode provided in each of the first sub pixel and the second sub pixel;
an emission layer provided on the first electrode;
a second electrode provided on the emission layer;
a first overcoat layer provided between the first auxiliary layer and the first electrode provided in the first sub pixel;
a second overcoat layer provided between the second auxiliary layer and the first electrode provided in the second sub pixel; and
a third overcoat layer provided between the first overcoat layer and the second overcoat layer,
wherein the first overcoat layer, the second overcoat layer, and the third overcoat layer are spaced apart from each other, and are not connected with each other, and
wherein the first electrode provided in the first sub pixel is connected with the first auxiliary layer, and the first electrode provided in the second sub pixel is connected with the second auxiliary layer.