Display device and manufacturing method for display device
A display device includes: a display region, a frame region, a thin-film transistor layer, and a light emitter layer including a plurality of light emitters each having a first electrode, a light-emitting layer, and a second electrode. The plurality of light emitters emits mutually different colors of light. The second electrode is shared among the plurality of light emitters and contains a metal nanowire. The frame region includes a bank having a frame shape surrounding the display region and defining an end of the second electrode. A conductive film is disposed closer to the display region than the bank is, the conductive film electrically connecting together the terminal section and the second electrode. The conductive film includes a contact portion being in contact with the metal nanowire. The contact portion has a plurality of asperities disposed on a contact surface being in contact with the metal nanowire.
1. A display device comprising:
a display region;
a frame region surrounding the display region and including a terminal section;
a thin-film transistor layer; and
a light emitter layer including a plurality of light emitters each having a first electrode, a light-emitting layer, and a second electrode, the plurality of light emitters being configured to emit mutually different colors of light,
wherein the second electrode is shared among the plurality of light emitters and contains a metal nanowire,
the frame region includes a bank having a frame shape surrounding the display region and defining an end of the second electrode,
a conductive film is disposed closer to the display region than the bank is, the conductive film electrically connecting together the terminal section and the second electrode,
the conductive film includes a contact portion being in contact with the metal nanowire, and
the contact portion has a plurality of asperities disposed on a contact surface being in contact with the metal nanowire.
2. The display device according to claim 1 , wherein
the thin-film transistor layer includes an inorganic insulating film disposed under the conductive film,
the inorganic insulating film has a plurality of island-shaped protrusions, and
the plurality of asperities of the contact portion are disposed following the plurality of island-shaped protrusions of the inorganic insulating film.
3. The display device according to claim 2 , further comprising
a power-source trunk wire disposed between the conductive film and the inorganic insulating film,
wherein the power-source trunk wire has a plurality of asperities,
the plurality of asperities of the power-source trunk wire are disposed following the plurality of island-shaped protrusions of the inorganic insulating film, and
the plurality of asperities of the contact portion are disposed following the plurality of asperities of the power-source trunk wire.
4. The display device according to claim 1 , wherein
the thin-film transistor layer includes a flattening film disposed under the conductive film,
the flattening film has a plurality of asperities, and
the plurality of asperities of the contact portion are disposed following the plurality of asperities of the flattening film.
5. The display device according to claim 4 , wherein
the frame region includes
the flattening film having a trench disposed closer to the display region than the bank is, and
the contact portion covering the trench.
6. The display device according to claim 5 , wherein the trench has a frame shape surrounding an entire perimeter of the display region.
7. The display device according to claim 5 , wherein
the terminal section includes a plurality of terminals disposed along one of four sides of the display region, and
the trench surrounds a part of the one side and all remaining three of the four sides of the display region.
8. The display device according to claim 7 , wherein the metal nanowire is shorter than a distance between the plurality of terminals adjacent to each other.
9. The display device according to claim 1 , further comprising:
a sealing layer including an organic film and sealing the light emitter layer; and
a sealing bank having a frame shape surrounding the bank, the sealing bank defining an end of the organic film.
10. The display device according to claim 9 , wherein a photo-spacer is disposed between the bank and the sealing bank in a plan view.
11. The display device according to claim 10 , wherein the bank is thinner than the photo-spacer.
12. The display device according to claim 1 , wherein the bank is a sealing bank defining the end of an organic film.
13. The display device according to claim 1 , wherein
the light emitter layer includes an edge cover film covering an edge of the first electrode,
the bank is disposed in a layer identical to a layer where the edge cover film is disposed, and
the bank is made of a material identical to a material of the edge cover film.
14. The display device according to claim 1 , wherein the bank has a surface provided with a plurality of recesses.
15. The display device according to claim 1 , wherein
the conductive film is disposed in a layer identical to a layer where the first electrode is disposed, and
the conductive film is made of a material identical to a material of the first electrode.
16. The display device according to claim 1 , wherein the light-emitting layer is a quantum-dot light-emitting layer.
17. The display device according to claim 1 , wherein the second electrode has a light transmittancy of 80% or more.
18. The display device according to claim 1 , wherein the metal nanowire contains at least one of Ag, Au, Al and Cu.
19. The display device according to claim 1 , wherein
the first electrode is an anode,
the second electrode is a cathode, and
the second electrode contains an electron transport material.
20. The display device according to claim 19 , wherein the second electrode is in contact with the light-emitting layer.