US 12,446,404 B2
Display panel with configuration for enhanced luminance efficiency
Mi-Na Kim, Gyeonggi-do (KR); Jungsun Baek, Gyeonggi-do (KR); Seongjoo Lee, Gyeonggi-do (KR); Sunmi Lee, Gyeonggi-do (KR); and Namseok Yoo, Seoul (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Oct. 25, 2021, as Appl. No. 17/509,959.
Application 17/509,959 is a continuation of application No. 16/716,309, filed on Dec. 16, 2019, granted, now 11,189,815.
Claims priority of application No. 10-2018-0163604 (KR), filed on Dec. 17, 2018.
Prior Publication US 2022/0045297 A1, Feb. 10, 2022
Int. Cl. H10K 59/122 (2023.01); H10K 50/813 (2023.01); H10K 50/818 (2023.01); H10K 50/856 (2023.01); H10K 59/124 (2023.01); H10K 59/80 (2023.01); H10K 59/131 (2023.01); H10K 59/35 (2023.01)
CPC H10K 59/122 (2023.02) [H10K 50/813 (2023.02); H10K 50/818 (2023.02); H10K 50/856 (2023.02); H10K 59/124 (2023.02); H10K 59/80515 (2023.02); H10K 59/80518 (2023.02); H10K 59/878 (2023.02); H10K 59/131 (2023.02); H10K 59/35 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A display panel comprising:
first, second and third subpixels disposed on a substrate;
an overcoat layer disposed in the first, second and third subpixels;
a concave area and a convex area in the overcoat layer in at least one of the first, second and third subpixels, the concave area being connected to the convex area through a first inclined surface of the overcoat layer;
first, second and third anode electrodes corresponding to the first, second and third subpixels, respectively, wherein at least one of the first, second and third anode electrodes includes a second inclined surface overlapping with the first inclined surface of the overcoat layer;
first, second and third organic light emitting layers disposed on the first, second and third anode electrodes, respectively; and
a bank layer disposed on the overcoat layer, the bank layer including a third inclined surface,
wherein at least one of the first, second and third inclined surfaces is configured to reflect light emitted from a corresponding one of the first, second and third organic light emitting layers,
wherein the concave area and a portion of the convex area connected to each other through the first inclined surface of the overcoat layer overlap with the corresponding light emitting layer in the at least one of the first, second and third subpixels,
wherein the concave area of the overcoat layer has a first thickness, and the convex area of the overcoat layer has a second thickness greater than the first thickness,
wherein the overcoat layer in each first, second and third subpixels has the first thickness,
wherein at least one of the first, second, and third anode electrodes does not have the second inclined surface, and
wherein a maximum thickness of the bank layer along a perpendicular direction that is perpendicular to an uppermost surface of the bank layer in an area between the third inclined surface of the bank layer and a top surface of the at least one of the first, second, and third anode electrodes not having the second inclined surface is greater than a maximum thickness of the bank layer along the perpendicular direction in an area between the third inclined surface and the second inclined surface in the at least one of the first, second and third subpixels.