US 12,250,846 B2
Light emitting element having light emitting layer and metal layer sequentially stacked on conductive ball, manufacturing method thereof, display device including light emitting element, and manufacturing method thereof
Kyoungwon Min, Paju-si (KR); Jaekyeong Yun, Paju-si (KR); and Sangkyu Kim, Paju-si (KR)
Assigned to LG Display Co., Ltd., (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Nov. 8, 2021, as Appl. No. 17/520,921.
Claims priority of application No. 10-2020-0174661 (KR), filed on Dec. 14, 2020.
Prior Publication US 2022/0190302 A1, Jun. 16, 2022
Int. Cl. H10K 50/80 (2023.01); H10K 59/12 (2023.01); H10K 59/122 (2023.01); H10K 71/00 (2023.01); H10K 71/13 (2023.01); H10K 71/20 (2023.01)
CPC H10K 50/868 (2023.02) [H10K 59/122 (2023.02); H10K 71/00 (2023.02); H10K 71/135 (2023.02); H10K 71/233 (2023.02); H10K 59/1201 (2023.02)] 10 Claims
OG exemplary drawing
 
1. A light emitting element comprising:
a spherical conductive ball;
a light emitting layer in contact with a surface of the spherical conductive ball and covering a portion of a surface along a shape of the surface of the spherical conductive ball;
a metal layer formed on the light emitting layer and not directly in contact with the surface of the conductive ball; and
an insulating layer covering at least a portion of a remaining portion of the surface along the shape of the surface of the spherical conductive ball,
wherein the light emitting layer is disposed between the spherical conductive ball and the metal layer and directly in contact with the spherical conductive ball and the metal layer.
 
6. A display device comprising:
a substrate on which a circuit element layer comprising at least one circuit element is disposed;
an anode electrode formed on the circuit element layer;
a bank configured to cover an edge of the anode electrode and to define a light emitting part;
at least one light emitting element disposed on the anode electrode by corresponding to the light emitting part; and
a cathode electrode covering the at least one light emitting element and the bank,
wherein the light emitting element comprises:
a spherical conductive ball;
a light emitting layer directly in contact with a surface of the spherical conductive ball and covering a portion of a surface along a shape of the surface of the conductive ball;
a metal layer formed on the light emitting layer and not in contact with the surface of the conductive ball; and
an insulating layer covering at least a portion of a remaining portion of the surface along the shape of the surface of the conductive ball.