US 12,471,476 B2
Display device display device with subpixels including a white quantum dot
Jaeho Lee, Seoul (KR); Wonhoe Koo, Goyang-si (KR); Kyung Hoon Han, Paju-si (KR); YongCheol Kim, Goyang-si (KR); and Hyekyung Choi, Seoul (KR)
Assigned to LG Display Co., Ltd., (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Jun. 25, 2021, as Appl. No. 17/359,429.
Claims priority of application No. 10-2020-0078184 (KR), filed on Jun. 26, 2020.
Prior Publication US 2021/0408137 A1, Dec. 30, 2021
Int. Cl. H10K 59/38 (2023.01); H10K 59/35 (2023.01)
CPC H10K 59/38 (2023.02) [H10K 59/353 (2023.02)] 14 Claims
OG exemplary drawing
 
1. A display device comprising:
a light emitting element disposed in each of a plurality of subpixels and including a first blue light emitting layer, a green light emitting layer on the first blue light emitting layer, and a second blue light emitting layer on the green light emitting layer;
a first light conversion layer disposed in a white subpixel among the plurality of subpixels;
a second light conversion layer disposed in a red subpixel among the plurality of subpixels and having higher light conversion efficiency than the first light conversion layer; and
a red color filter disposed to overlap with the second light conversion layer,
wherein the first light conversion layer and the second light conversion layer convert light emitted from the first blue light emitting layer, the green light emitting layer, and the second blue light emitting layer into red light, wherein a proportion of light converted by the first light conversion layer is different from the second light conversion layer, and
wherein the first light conversion layer includes a plurality of first light conversion layer patterns spaced apart from each other.
 
8. A display device comprising:
a light emitting unit disposed in a plurality of subpixels including a plurality of white subpixels and a plurality of red subpixels and including a light emitting layer emitting blue light and a light emitting layer emitting green light;
a first light conversion layer disposed in the plurality of white subpixels to convert the light emitted from the light emitting unit into red light;
a second light conversion layer disposed in the plurality of red subpixels to convert the light emitted from the light emitting unit into red light; and
a red color filter disposed below the second light conversion layer in each of the plurality of red subpixels,
wherein a light conversion efficiency of the second light conversion layer is higher than a light conversion efficiency of the first light conversion layer and wherein the first light conversion layer and the second light conversion layer convert different proportions of light emitted from the light emitting layer, and
wherein the first light conversion layer includes a plurality of first light conversion layer patterns spaced apart from each other.