US 12,453,236 B2
Light emitting display device with a tandem emission part
Takashi Hirano, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Oct. 31, 2022, as Appl. No. 17/977,995.
Claims priority of application No. 10-2021-0192298 (KR), filed on Dec. 30, 2021.
Prior Publication US 2023/0217678 A1, Jul. 6, 2023
Int. Cl. H10K 50/19 (2023.01); H10K 59/122 (2023.01); H10K 59/35 (2023.01); H10K 71/00 (2023.01); H10K 59/12 (2023.01)
CPC H10K 50/19 (2023.02) [H10K 59/122 (2023.02); H10K 59/351 (2023.02); H10K 71/00 (2023.02); H10K 59/1201 (2023.02)] 17 Claims
OG exemplary drawing
 
1. A light emitting display device, comprising:
a light emitting diode structure disposed on a substrate and having a first sub-pixel including a first emission part that emits light of a first color, a second sub-pixel including a second emission part that emits light of a second color, a third sub-pixel including a third emission part that emits light of a third color and a fourth sub-pixel including a fourth emission part that emits light of a fourth color;
a bank that defines a pixel area of each of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel; and
a function improving unit disposed on the first emission part, the second emission part, the third emission part, the fourth emission part and the bank,
wherein one or two of sub-pixel among the first to fourth sub-pixels include a tandem emission part in which a first emission unit including a first emission layer and a second emission unit disposed on the first emission unit and including a second emission part are laminated.