US 11,903,231 B2
Electroluminescent display device
SeungMin Baik, Paju-si (KR); JiYeon Park, Paju-si (KR); and Ho-Jin Kim, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Apr. 13, 2023, as Appl. No. 18/134,525.
Application 18/134,525 is a division of application No. 17/019,115, filed on Sep. 11, 2020, granted, now 11,659,727.
Claims priority of application No. 10-2019-0120492 (KR), filed on Sep. 30, 2019.
Prior Publication US 2023/0255049 A1, Aug. 10, 2023
Int. Cl. H10K 50/18 (2023.01); H10K 50/16 (2023.01); H10K 50/13 (2023.01); H10K 50/17 (2023.01); H10K 50/856 (2023.01); H10K 50/858 (2023.01); H10K 59/12 (2023.01); H10K 59/38 (2023.01); H10K 59/35 (2023.01)
CPC H10K 50/18 (2023.02) [H10K 50/131 (2023.02); H10K 50/16 (2023.02); H10K 50/171 (2023.02); H10K 50/856 (2023.02); H10K 50/858 (2023.02); H10K 59/12 (2023.02); H10K 59/38 (2023.02)] 7 Claims
OG exemplary drawing
 
1. An electroluminescent display device comprising:
a first pixel and a second pixel, wherein each of the first pixel and the second pixel includes a first sub pixel configured to emit first colored light, a second sub pixel configured to emit second colored light, and a third sub pixel configured to emit third colored light;
a first electrode in each of the first sub pixel, the second sub pixel, and the third sub pixel;
an emission layer on the first electrode;
a second electrode on the emission layer; and
a charge blocking layer including a first charge blocking layer provided in an area overlapped with a boundary area between the first sub pixel of the first pixel and the first sub pixel of the second pixel, a second charge blocking layer provided in an area overlapped with a boundary area between the second sub pixel of the first pixel and the second sub pixel of the second pixel, and a third charge blocking layer provided in an area overlapped with a boundary area between the third sub pixel of the first pixel and the third sub pixel of the second pixel.