US 11,751,445 B2
Display device
Hisao Ochi, Sakai (JP); Jumpei Takahashi, Sakai (JP); and Tohru Sonoda, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Osaka (JP)
Appl. No. 17/40,899
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Mar. 29, 2018, PCT No. PCT/JP2018/013482
§ 371(c)(1), (2) Date Sep. 23, 2020,
PCT Pub. No. WO2019/186979, PCT Pub. Date Oct. 3, 2019.
Prior Publication US 2021/0013296 A1, Jan. 14, 2021
Int. Cl. H10K 59/131 (2023.01); H10K 50/844 (2023.01); H10K 50/842 (2023.01); H10K 59/124 (2023.01)
CPC H10K 59/131 (2023.02) [H10K 50/844 (2023.02); H10K 50/8426 (2023.02); H10K 59/124 (2023.02)] 11 Claims
OG exemplary drawing
 
1. A display device comprising:
a substrate;
a first conductive layer on the substrate;
a planarization film on the first conductive layer;
a plurality of light-emitting elements on the planarization film; and
a damming wall along an entirety of a periphery of the planarization film in the frame area so as to surround the display area, wherein
the display device has: a display area where an image is displayed using light emitted by the plurality of light-emitting elements; and a frame area surrounding the display area,
the plurality of light-emitting elements includes: a first electrode; a functional layer on the first electrode; and a second electrode overlapping the first electrode with the functional layer intervening therebetween,
the frame area includes a second conductive layer in contact with the second electrode on the planarization film and also in contact with the first conductive layer on the periphery of the planarization film, the second electrode being electrically connected to the first conductive layer via the second conductive layer,
the planarization film includes, in the frame area, a portion where at least one trench extends along three sides of the display area in a plan view through the planarization film in such a manner that the at least one trench divides the planarization film into a segment internal to the frame area and a segment external to the frame area,
the first conductive layer is provided additionally in a location corresponding to the at least one trench, the additional first conductive layer being exposed from the planarization film in the at least one trench, and
the second electrode is in contact with the second conductive layer in the at least one trench and electrically connected to the first conductive layer via the second conductive layer,
the first conductive layer and the second conductive layer are in contact with each other in a slit being outside the planarization film and formed between the planarization film and the damming wall, and
the second electrode and the second conductive layer are in contact with each other on the planarization film.