Organic light emitting element, organic el display panel, organic el display device, coated device, and method for manufacturing these

1. An organic light-emitting element comprising:

a substrate;

a light-emitting part above the substrate, the light-emitting part including an organic layer; and

banks defining bounds of the organic layer in a direction along a main surface of the substrate, wherein

in plan view, a surface of the organic layer is longer in a first direction than in a second direction perpendicular to the first direction, and

in the second direction, the surface of the organic layer is convex, protruding upwards in a thickness direction of the organic layer, and in the first direction, the surface of the organic layer is concave, protruding downwards in the thickness direction.

2. The organic light-emitting element of claim 1 , wherein

in the second direction, a central portion of the surface of the organic layer protrudes upwards in the thickness direction to be higher than end portions of the surface of the organic layer, and

in the first direction, end portions of the surface of the organic layer protrude upwards in the thickness direction to be higher than the central portion of the surface of the organic layer.

3. The organic light-emitting element of claim 1 , wherein

ink containing organic material, applied with respect to a recess surrounded by the banks and then dried, forms the organic layer.

4. The organic light-emitting element of claim 1 , wherein

a ratio of a length of the organic layer in the first direction to a length of the organic layer in the second direction is between 3:1 and 5:1.

5. An organic EL display panel comprising

a two-dimensional array of pixels each including a sub-pixel, wherein

in at least some of the pixels, the sub-pixel has the structure of the organic light-emitting element of claim 1 .

6. An organic EL display device comprising

the organic EL display panel of claim 5 .

7. An application-type device comprising:

a substrate provided with a recess; and

a functional layer, ink applied with respect to the recess and then dried forming the functional layer, wherein

in plan view, a surface of the functional layer is longer in a first direction than in a second direction perpendicular to the first direction, and

in the second direction, the surface of the functional layer is convex, protruding upwards in a thickness direction of the functional layer, and in the first direction, the surface of the functional layer is concave, protruding downwards in the thickness direction.

8. The application-type device of claim 7 , wherein

a ratio of a length of the functional layer in the first direction to a length of the functional layer in the second direction is between 3:1 and 5:1.

9. A method of manufacturing an organic light-emitting element, comprising:

preparing a substrate;

forming banks above the substrate to surround a part of an area above the substrate;

applying ink containing organic material to fill a recess formed by the banks surrounding the part of the area above the substrate, and forming a layer of applied ink; and

drying the layer of applied ink and forming an organic layer, the organic layer included in a light-emitting part of the organic light-emitting element, wherein

in plan view, a surface of the organic layer, which is formed inside the recess, is longer in a first direction than in a second direction perpendicular to the first direction, and

in the second direction, the surface of the organic layer is convex, protruding upwards in a thickness direction of the organic layer, and in the first direction, the surface of the organic layer is concave, protruding downwards in the thickness direction.

10. The method of claim 9 , wherein

before the drying, a surface of the layer of applied ink is convex in both the first direction and the second direction.

11. The method of claim 9 , wherein

a ratio of a length of the organic layer in the first direction to a length of the organic layer in the second direction is between 3:1 and 5:1.

12. A method of manufacturing an organic EL display panel that includes a two-dimensional array of pixels, comprising

forming sub-pixels of the pixels, wherein

the forming of sub-pixels in at least some of the pixels is performed according to the organic light-emitting element manufacturing method of claim 9 .

13. A method of manufacturing an organic EL display device that includes an organic EL display panel having a two-dimensional array of pixels, and connected to the organic EL display panel, a unit for driving and controlling the organic EL display panel, the method comprising

manufacturing the organic EL display panel, wherein

the manufacturing of the organic EL display panel is performed according to the method of claim 12 .

14. A method of manufacturing an application-type device, the method comprising:

preparing a substrate provided with a recess;

applying ink with respect to the recess; and

drying the ink and forming a functional layer, wherein

in plan view, a surface of the functional layer, which is formed inside the recess, is longer in a first direction than in a second direction perpendicular to the first direction, and

in the second direction, the surface of the functional layer is convex, protruding upwards in a thickness direction of the functional layer, and in the first direction, the surface of the functional layer is concave, protruding downwards in the thickness direction.

15. The method of claim 14 , wherein

before the drying, a surface of a layer of the applied ink is convex in both the first direction and the second direction.

16. The method of claim 14 , wherein

a ratio of a length of the functional layer in the first direction to a length of the functional layer in the second direction is between 3:1 and 5:1.