Display device and manufacturing method therefor

{
  "publication_number": "US2022328737A1",
  "country": "US",
  "kind": "A1",
  "title": "Display device and manufacturing method therefor",
  "abstract": "A display device may include a light emitting element including a first end having a first surface, and a second end having a second surface parallel to the first surface, an organic pattern that overlaps the light emitting element and exposes the first and second surfaces, a first electrode disposed on a substrate and electrically contacting the first end, and a second electrode disposed on the substrate and spaced apart from the first electrode, and electrically contacting the second end. A surface area of the first surface may be less than that of the second surface. A top surface of the organic pattern may be a curved surface.",
  "claims": [
    "1. A display device comprising: a light emitting element disposed on a substrate, and comprising: a first end including a first surface; and a second end including a second surface parallel to the first surface; an organic pattern that overlaps the light emitting element and exposes the first surface and the second surface; a first electrode disposed on the substrate and electrically contacting the first end; and a second electrode disposed on the substrate and spaced apart from the first electrode, and electrically contacting the second end, wherein a surface area of the first surface is less than a surface area of the second surface, and top surface of the organic pattern is a curved surface. 2. The display device according to claim 1, wherein the top surface of the organic pattern is a convex surface protruding in a thickness direction of the substrate. 3. The display device according to claim 1, further comprising: scattering particles dispersed in the organic pattern, wherein the scattering particles include at least one of titanium oxide (TiO 2), zirconium oxide (ZrO 2), aluminum oxide (Al 2 O 3), indium oxide (In 2 O 3), zinc oxide (ZnO), and tin oxide (SnO 2). 4. The display device according to claim 1, further comprising: wavelength conversion particles dispersed in the organic pattern, wherein the wavelength conversion particles include quantum dots. 5. The display device according to claim 1, further comprising a first reflective pattern disposed adjacent to the first surface, and a second reflective pattern disposed adjacent to the second surface. 6. The display device according to claim 5, wherein the first reflective pattern comprises: a first bank disposed on the substrate; and a first reflective layer disposed along a surface of the first bank, and the second reflective pattern comprises: a second bank disposed on the substrate; and a second reflective layer disposed along a surface of the second bank. 7. The display device according to claim 6, wherein the first electrode overlaps the first reflective pattern and is disposed on the first reflective layer, and the second electrode overlaps the second reflective pattern and is disposed on the second reflective layer. 8. The display device according to claim 7, wherein the first bank and the second bank each have a trapezoidal shape having sidewalls inclined at an angle. 9. A display device comprising: a light emitting element disposed on a substrate at regular intervals in a first direction, and comprising: a first end including a first surface; and a second end including a second surface parallel to the first surface; a plurality of organic patterns respectively disposed on the light emitting elements, and each exposing the first surface and the second surface; and a first electrode electrically contacting the first end; and a second electrode electrically contactinig the second end, wherein the first electrode and the second electrode are disposed on the substrate and spaced apart from each other in a second direction intersecting the first direction, a top surface of each of the plurality of organic patterns is a convex surface protruding in a third direction intersecting the first direction and the second direction. 10. The display device according to claim 9, wherein the plurality of organic patterns are spaced apart from each other without contacting each other. 11. The display device according to claim 9, further comprising scattering particles dispersed in the plurality of organic patterns, wherein the scattering particles include at least one of titanium oxide (TiO 2), zirconium oxide (ZrO 2), aluminum oxide (Al 2 O 3), indium oxide (In 2 O 3), zinc oxide (ZnO), and tin oxide (SnO 2). 12. The display device according to claim 11, further comprising wavelength conversion particles dispersed in the plurality of organic patterns, wherein the wavelength conversion particles include quantum dots. 13. The display device according to claim 9, further comprising: a first reflective pattern disposed adjacent to the first end, and disposed on the substrate: and a second reflective pattern disposed adjacent to the second end and disposed on the substrate. 14. A method of fabricating a display device, comprising: preparing a gravure substrate including a groove; disposing, into the groove, including a base resin and light emitting elements dispersed in the base resin; transferring the ink disposed in the groove to a blanket; transferring, to the substrate, the ink transferred to the blanket; forming an organic pattern by removing at least a portion of the base resin; and forming, on the substrate, a first electrode and a second electrode partially overlapping the light emitting element, and spaced apart from each other in a direction. 15. The method according to claim 14, wherein the light emitting element comprises: a first surface: and a second surface parallel to the first direction, a surface area of the first surface being less than a surface area of the second surface, and the forming of the organic pattern comprises removing at least a portion of the base resin such that the first surface and the second surface are exposed. 16. The method according to claim 15, wherein the first electrode electrically contacts the first surface, and the second electrode ectricaily contacts the second surface. 17. The method according to claim 16, wherein a top surface of the organic pattern is a curved surface. 18. The method according to claim 14, wherein the disposing of the ink including the base resin and the light emitting elements comprises: applying the ink onto the gravure substrate; and removing, using a blade that scrapes a surface of the gravure surface, the ink that is not disposed into the groove. 19. The method according to claim 14, wherein: in a plan view, a surface area of the groove is greater than a surface area of the light emitting element, and one light emitting element is disposed into the groove. 20. The method according to claim 14, wherein the gravure substrate includes a plurality of grooves, and the plurality of grooves are spaced apart from each other at regular intervals."
  ],
  "description_excerpt": "The disclosure relate to a display device and a method of fabricating the display device, and more specifically, to a display device including a light emitting element and a method of fabricating the display device.\n\nA display device may use a light emitting element such as a light emitting diode as a light source of a pixel to display an image. The light emitting diode may maintain relatively satisfactory durability even under poor environmental conditions, and be excellent in terms of lifetime and luminance.\n\nRecently, research on the technology of fabricating a light emitting diode using material having a high-reliability inorganic crystalline structure, and disposing the light emitting diode on a panel of a display device to use it as a next generation pixel light source has become more active. As a part of such research, development of a display device using, as a light source of each pixel, a light emitting diode fabricated in a small size corresponding to the micro-scale or the nano-scale is ongoing.\n\nIn an alignment scheme using an inkjet printing process among schemes of aligning light emitting elements, an interval between the light emitting elements and a position of each light emitting element cannot be adjusted, so it may be problematic in that pixels of a display device emits uneven light. Furthermore, in the alignment scheme using the inkjet printing process, some of the light emitting elements may not be aligned. The light emitting elements that are not aligned may cause a defect during a subsequent process.",
  "cpc": [
    "H10H 20/853",
    "H01L 25/167",
    "H01L 33/32",
    "H01L 33/501",
    "H01L 33/54",
    "H10H 20/01",
    "H10H 20/013",
    "H10H 20/0361",
    "H10H 20/0362",
    "H10H 20/813",
    "H10H 20/818",
    "H10H 20/819",
    "H10H 20/825",
    "H10H 20/831",
    "H10H 20/851",
    "H10H 20/8511",
    "H10H 20/854",
    "H10H 20/856",
    "H10H 20/882",
    "H10H 29/142",
    "H10W 70/60",
    "H10W 70/654",
    "H10W 72/0198",
    "H10W 90/00",
    "H10W 90/22"
  ],
  "ipc": [
    "H01L 33/50",
    "H01L 33/54",
    "H01L 25/16"
  ],
  "assignees": [
    "Samsung Display Co Ltd"
  ],
  "inventors": [
    "Moon Jung An",
    "Dong Eon LEE"
  ],
  "filing_date": "2020-03-11",
  "publication_date": "2022-10-13",
  "priority_date": "2019-06-21",
  "application_number": "US-202017618166-A",
  "family_id": "74040197",
  "cited_by_count": 4,
  "citations": [
    "US5581116A",
    "US20170194531A1",
    "US20180175104A1"
  ]
}