US 12,310,210 B2
OLED light-emitting device, display device, electronic device, and method of manufacturing OLED light-emitting device
Keita Hamada, Kanagawa (JP); and Shigeru Mori, Kanagawa (JP)
Assigned to Wuhan Tianma Micro-Electronics Co., Ltd., Wuhan (CN)
Filed by Wuhan Tianma Micro-Electronics Co., Ltd., Wuhan (CN)
Filed on Nov. 19, 2021, as Appl. No. 17/455,793.
Claims priority of application No. 2020-196351 (JP), filed on Nov. 26, 2020; and application No. 2021-157700 (JP), filed on Sep. 28, 2021.
Prior Publication US 2022/0165807 A1, May 26, 2022
Int. Cl. H01L 27/32 (2006.01); H01L 51/50 (2006.01); H01L 51/56 (2006.01); H10K 50/13 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/19 (2023.01); H10K 59/122 (2023.01); H10K 59/32 (2023.01); H10K 59/35 (2023.01); H10K 71/00 (2023.01)
CPC H10K 59/32 (2023.02) [H10K 50/13 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/19 (2023.02); H10K 59/122 (2023.02); H10K 59/35 (2023.02); H10K 71/00 (2023.02)] 8 Claims
OG exemplary drawing
 
1. An OLED light-emitting device comprising:
an element separation layer having openings defining light-emitting regions and a top face between the openings;
lower electrodes exposed inside the openings;
a first stack-structured light-emitting element disposed on a first lower electrode of the lower electrodes; and
a second stack-structured light-emitting element disposed on a second lower electrode of the lower electrodes adjacent to the first lower electrode, the second stack-structured light-emitting element being adjacent to the first stack-structured light-emitting element;
wherein the first stack-structured light-emitting element includes a first light-emitting unit and a second light-emitting unit stacked above the element separation layer and a first charge generation layer located between the first light-emitting unit and the second light-emitting unit,
wherein each of the first light-emitting unit and the second light-emitting unit includes a light-emitting layer,
wherein the first charge generation layer includes a first charge generation component layer configured to generate a first charge being a positive charge or a negative charge and a second charge generation component layer located above the first charge generation component layer and configured to generate a second charge having a polarity opposite of the first charge,
wherein the second stack-structured light-emitting element includes a third light-emitting unit and a fourth light-emitting unit stacked above the element separation layer and a second charge generation layer located between the third light-emitting unit and the fourth light-emitting unit,
wherein each of the third light-emitting unit and the fourth light-emitting unit includes a light-emitting layer,
wherein the second charge generation layer includes a third charge generation component layer configured to generate a third charge having a polarity same as the first charge and a fourth charge generation component layer located above the third charge generation component layer and configured to generate a fourth charge having a polarity opposite of the third charge,
wherein a first end region of the first charge generation layer and a second end region of the second charge generation layer overlap above the top face of the element separation layer,
wherein the overlap region includes the first charge generation component layer, the second charge generation component layer, the third charge generation component layer, and the fourth charge generation component layer laid in this order from the bottom,
wherein the second charge generation component layer between the first charge generation component layer and the third charge generation component layer is configured to block the first charge and the third charge, and
wherein the third charge generation component layer between the second charge generation component layer and the fourth charge generation component layer is configured to block the second charge and the fourth charge.