	US 12,108,625 B2
	Display device, method of manufacturing display device, and electronic device
Tomoyoshi Ichikawa, Kanagawa (JP); and Hiroshi Fujimaki, Kanagawa (JP)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 15/558,812
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Feb. 19, 2016, PCT No. PCT/JP2016/054922 § 371(c)(1), (2) Date Sep. 15, 2017, PCT Pub. No. WO2016/158074, PCT Pub. Date Oct. 6, 2016.
Claims priority of application No. 2015-074982 (JP), filed on Apr. 1, 2015.
Prior Publication US 2018/0083226 A1, Mar. 22, 2018
Int. Cl. H10K 50/852 (2023.01); H10K 50/13 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 50/818 (2023.01); H10K 50/828 (2023.01); H10K 50/86 (2023.01); H10K 59/12 (2023.01); H10K 59/38 (2023.01); H10K 71/00 (2023.01); H10K 102/00 (2023.01)

CPC H10K 50/852 (2023.02) [H10K 50/13 (2023.02); H10K 50/131 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/17 (2023.02); H10K 50/818 (2023.02); H10K 50/828 (2023.02); H10K 50/86 (2023.02); H10K 59/12 (2023.02); H10K 59/38 (2023.02); H10K 71/00 (2023.02); H10K 2102/351 (2023.02)]

6 Claims

1. A display device comprising:

a first electrode;

an inorganic hole injecting and transporting layer formed of an inorganic material and formed on the first electrode;

at least one pixel including a first sub-pixel having a first luminescent color, a second sub-pixel having a second luminescent color different from the first luminescent color, and a third sub-pixel having a third luminescent color different from the first and second luminescent colors, each of the first, second, and third sub-pixels formed on the inorganic hole injecting and transporting layer;

an electron transport layer formed on the first, second, and third sub-pixels;

a second electrode formed on the electron transport layer; and

for each pixel, only the first sub-pixel is separated from adjacent sub-pixels by a partition wall, the partition wall extending through the inorganic hole injecting and transporting layer, wherein

a light emitting layer of the first sub-pixel is formed by laminating a first light emitting layer of the first luminescent color, a second light emitting layer of the second luminescent color, and a third light emitting layer of the third luminescent color, and

a light emitting layer of the second sub-pixel is formed by laminating the second light emitting layer of the second luminescent color and the third light emitting layer of the third luminescent color, and

for each pixel, only the first sub-pixel further includes an optical path length adjusting layer between the inorganic hole injecting and transporting layer and the first light emitting layer, the optical path length adjusting layer being made of an organic material having a hole transporting property.