US 11,659,727 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 Sep. 11, 2020, as Appl. No. 17/19,115.
Claims priority of application No. 10-2019-0120492 (KR), filed on Sep. 30, 2019.
Prior Publication US 2021/0098733 A1, Apr. 1, 2021
Int. Cl. H01L 27/32 (2006.01); H01L 51/50 (2006.01); H01L 51/52 (2006.01)
CPC H01L 51/5096 (2013.01) [H01L 27/322 (2013.01); H01L 27/3244 (2013.01); H01L 51/5044 (2013.01); H01L 51/5072 (2013.01); H01L 51/5092 (2013.01); H01L 51/5271 (2013.01); H01L 51/5275 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An electroluminescent display device comprising:
a first pixel including 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 the first sub pixel;
an emission layer on the first electrode;
a second electrode on the emission layer; and
a first charge blocking layer provided below the second electrode and configured to prevent a light emission in the emission layer,
wherein the first electrode is electrically connected with a driving thin film transistor in a first contact area provided in the first sub pixel, and
the first charge blocking layer is overlapped with the first contact area.