US 12,232,390 B2
Display apparatus with organic light-emitting diodes
Hyeongpil Kim, Yongin-si (KR); and Byounghun Sung, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Jul. 9, 2021, as Appl. No. 17/371,103.
Claims priority of application No. 10-2020-0152282 (KR), filed on Nov. 13, 2020.
Prior Publication US 2022/0157896 A1, May 19, 2022
Int. Cl. H10K 59/35 (2023.01); H10K 50/15 (2023.01); H10K 59/122 (2023.01); H10K 59/38 (2023.01)
CPC H10K 59/353 (2023.02) [H10K 50/15 (2023.02); H10K 59/122 (2023.02); H10K 59/38 (2023.02)] 17 Claims
OG exemplary drawing
 
1. A display apparatus comprising a first subpixel for emitting a first color light, a second subpixel for emitting a second color light, and a third subpixel for emitting a third color light, the display apparatus comprising:
a first organic light-emitting diode of the first subpixel, a second organic light-emitting diode of the second subpixel, and a third organic light-emitting diode of the third subpixel arranged on a substrate;
a first intermediate layer commonly included in the first organic light-emitting diode and the second organic light-emitting diode, the first intermediate layer comprising a first emission layer and a first hole transport layer;
a second intermediate layer included in the third organic light-emitting diode, the second intermediate layer comprising a second emission layer and a second hole transport layer; and
a first color converting layer, a second color converting layer, and a third color converting layer arranged to overlap the first organic light-emitting diode, the second organic light-emitting diode, and the third organic light-emitting diode, respectively,
wherein the first emission layer and the second emission layer are configured to emit different color lights from each other,
wherein a hole mobility of the first hole transport layer is different from a hole mobility of the second hole transport layer,
wherein the first hole transport layer is formed by doping a host of an organic material with an oxide comprising at least one of HfOx, ZrOx, LaOx, La2O3, LaAlOx, TaOx, AlOx, Al2O3, SiO2, ZrSiO4, HfSiO4, SrO, Y2O3, CaO, BaO, BaZrO, MgO, TiO2, or Si3N4,
wherein the first hole transport layer and the second hole transport layer do not overlap in a thickness direction.
 
12. A display apparatus comprising a first subpixel for emitting a first color light, a second subpixel for emitting a second color light, and a third subpixel for emitting a third color light, the display apparatus comprising:
a first organic light-emitting diode of the first subpixel, a second organic light-emitting diode of the second subpixel, and a third organic light-emitting diode of the third subpixel arranged on a substrate;
a first intermediate layer commonly included in the first organic light-emitting diode and the second organic light-emitting diode, the first intermediate layer comprising a first emission layer and a first hole transport layer;
a second intermediate layer included in the third organic light-emitting diode, the second intermediate layer comprising a second emission layer and a second hole transport layer; and
a bank arranged on the substrate to surround at least a portion of the second intermediate layer,
wherein the first emission layer and the second emission layer are configured to emit different color lights from each other,
wherein the first hole transport layer is formed by doping a host of an organic material with an oxide comprising one of HfOx, ZrOx, LaOx, La2O3, LaAlOx, TaOx, AlOx, Al2O3, SiO2, ZrSiO4, HfSiO4, SrO, Y2O3, CaO, BaO, BaZrO, MgO, TiO2, or Si3N4,
wherein the first hole transport layer and the second hole transport layer do not overlap in a thickness direction, and
wherein a hole mobility of the first hole transport layer is different from a hole mobility of the second hole transport layer.