US 12,225,804 B2
Electroluminescence display device having a through-hole in display area
HaeRi Huh, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Oct. 23, 2023, as Appl. No. 18/382,956.
Application 18/382,956 is a continuation of application No. 17/722,099, filed on Apr. 15, 2022, granted, now 11,839,132.
Application 17/722,099 is a continuation of application No. 16/717,695, filed on Dec. 17, 2019, granted, now 11,367,759, issued on Jun. 21, 2022.
Claims priority of application No. 10-2018-0173299 (KR), filed on Dec. 31, 2018.
Prior Publication US 2024/0057440 A1, Feb. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H10K 59/65 (2023.01); H01L 25/075 (2006.01); H01L 33/24 (2010.01); H01L 33/56 (2010.01); H10K 50/844 (2023.01); H10K 59/121 (2023.01)
CPC H10K 59/65 (2023.02) [H01L 25/0753 (2013.01); H01L 33/24 (2013.01); H01L 33/56 (2013.01); H10K 50/844 (2023.02); H10K 59/121 (2023.02)] 18 Claims
OG exemplary drawing
 
1. An electroluminescence display device comprising:
a substrate having a display area and a non-display area arranged near the display area;
a light emitting diode disposed in the display area;
an encapsulation layer disposed on the light emitting diode, the encapsulation layer including a first inorganic encapsulation layer, a second inorganic encapsulation layer, and an organic encapsulation layer disposed between the first and second inorganic encapsulation layers;
an upper passivation film disposed on the second inorganic encapsulation layer;
a through-hole arranged inside the display area to penetrate the substrate;
an inner dam surrounding the through-hole;
a trench disposed between the inner dam and the through-hole; and
a buffer layer on which a thin film transistor is arranged, the thin film transistor electrically connected to the light emitting diode,
wherein the buffer layer is disposed on the display area except at the through-hole and passes below the inner dam and the trench,
wherein the first inorganic encapsulation layer and the second inorganic encapsulation layer cover the inner dam and the trench in the display area,
wherein the trench includes a recessed portion recessed to reach an upper surface of the buffer layer between the through-hole and the inner dam, and
wherein the light emitting diode includes a light emitting layer that is disconnected at the trench.