US 12,484,413 B2
Light emitting display device
Sae Mi Park, Paju-si (KR); Myeong Seon Cho, Paju-si (KR); and Wook Song, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Nov. 30, 2022, as Appl. No. 18/071,697.
Claims priority of application No. 10-2021-0194770 (KR), filed on Dec. 31, 2021.
Prior Publication US 2023/0217770 A1, Jul. 6, 2023
Int. Cl. H10K 59/38 (2023.01); H10K 59/12 (2023.01)
CPC H10K 59/38 (2023.02) [H10K 59/12 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light emitting display device comprising:
a substrate comprising a first subpixel, a second subpixel, a third subpixel, and a fourth subpixel, each of the first, second, third, and fourth subpixels having an emission portion and a non-emission portion surrounding the emission portion;
a red conversion layer, a green conversion layer, and a blue conversion layer on the substrate so as to correspond respectively to the emission portions of the first subpixel, the second subpixel, and the third subpixel;
a first auxiliary conversion portion comprising a first auxiliary conversion layer to transmit red light and a second auxiliary conversion layer to transmit light having a wavelength shorter than a wavelength of the red light at the non-emission portion of the first subpixel;
a planarization layer to cover the red conversion layer, the green conversion layer, the blue conversion layer, and the first auxiliary conversion portion; and
a light emitting element over the first to fourth subpixels on the planarization layer, the light emitting element comprising a first electrode and a second electrode opposite each other, a first stack comprising a first blue emission layer and a second stack comprising a red emission layer and a green emission layer between the first electrode and the second electrode, and a first charge generation layer between the first and second stacks.