US 12,289,964 B2
Organic light emitting display panel having improved light efficiency and organic light emitting display device including the same
SeokWoo Son, Gyeonggi-do (KR); JungSun Baek, Gyeonggi-do (KR); and Joyeon Kim, Gyeonggi-do (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Aug. 1, 2023, as Appl. No. 18/228,812.
Application 18/228,812 is a continuation of application No. 17/892,853, filed on Aug. 22, 2022, granted, now 11,758,769.
Application 17/892,853 is a continuation of application No. 17/021,514, filed on Sep. 15, 2020, granted, now 11,456,343, issued on Sep. 27, 2022.
Claims priority of application No. 10-2019-0115803 (KR), filed on Sep. 20, 2019.
Prior Publication US 2023/0380220 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H10K 59/122 (2023.01); H10K 50/818 (2023.01); H10K 59/35 (2023.01)
CPC H10K 59/122 (2023.02) [H10K 50/818 (2023.02); H10K 59/35 (2023.02)] 21 Claims
OG exemplary drawing
 
1. A display panel comprising:
a substrate including an active area and a non-active area;
a transistor disposed on the substrate;
an insulation film disposed on the transistor, the insulation film including at least one concave portion;
a sub-pixel electrically connected to the transistor, the sub-pixel including an organic light emitting diode disposed on the insulation film; and
a bank disposed on the insulation film to expose the organic light-emitting diode,
wherein the sub-pixel includes at least two light emitting parts spaced apart from each other in a plan view, and at least one non-light emitting part disposed between the at least two light emitting parts in the plan view,
wherein a surface of a first electrode of the organic light emitting diode includes at least one protrusion overlapping with the at least one non-light emitting part,
wherein the at least one protrusion overlaps with the bank,
wherein the at least two light emitting parts include a first light emitting part corresponding to a center of the sub-pixel and a second light emitting part overlapping with an inclined portion of the first electrode, and
wherein a portion of the bank is disposed between the inclined portion of the first electrode and the first light emitting part, and the inclined portion includes a plurality of protrusions on the surface.