US 12,150,331 B2
Display device having a thin electrode that has a uniform film thickness
Hisayuki Utsumi, Sakai (JP); Youhei Nakanishi, Sakai (JP); Masayuki Kanehiro, Sakai (JP); Shota Okamoto, Sakai (JP); and Hiroki Imabayashi, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Osaka (JP)
Appl. No. 17/436,436
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Mar. 6, 2019, PCT No. PCT/JP2019/008960
§ 371(c)(1), (2) Date Sep. 3, 2021,
PCT Pub. No. WO2020/179034, PCT Pub. Date Sep. 10, 2020.
Prior Publication US 2022/0173348 A1, Jun. 2, 2022
Int. Cl. H10K 50/84 (2023.01); H10K 50/16 (2023.01); H10K 59/122 (2023.01); H10K 59/131 (2023.01); H10K 102/10 (2023.01)
CPC H10K 50/841 (2023.02) [H10K 50/16 (2023.02); H10K 59/122 (2023.02); H10K 59/131 (2023.02); H10K 2102/101 (2023.02)] 18 Claims
OG exemplary drawing
 
1. A display device including a display region and a frame region surrounding the display region, the display device comprising:
a thin film transistor (TFT) layer;
a light-emitting element layer formed with a plurality of light-emitting elements, each of the plurality of light-emitting elements including a first electrode, a function layer, and a second electrode; and
a sealing layer including an organic film and configured to seal the light-emitting element layer,
wherein the second electrode is an electrode common to the plurality of light-emitting elements and includes metal nanowires, the function layer includes a light-emitting layer and an electron transport layer provided between the light-emitting layer and the second electrode,
the electron transport layer includes zinc oxide nanoparticles and an organic resin,
a flattening film is included in the TFT layer,
in the frame region, a trench is formed in the flattening film to surround the display region in a plan view,
a bank defining an end portion of the organic film is provided on the flattening film at an outer side of the trench,
a partition formed on the flattening film is provided between the display region and the trench,
the trench is provided between the partition and the bank and is completely filled with the second electrode,
the second electrode overlaps the electron transport layer and the partition in the frame region, and
the partition defines an end portion of the electron transport layer.