Organic electro-luminescence display device
View Patent ↗An organic electro-luminescence display device includes a first substrate, plural pedestals which are provided in a convex shape on the first substrate and have inclined side surfaces, plural first electrodes respectively provided on the respective side surfaces of the pedestals, an organic electro-luminescence film which is provided above the plural pedestals and includes a light-emitting layer laminated on the plural first electrodes, and a second electrode which is provided above the plural pedestals and is laminated on the organic electro-luminescence film. Light generated in the light-emitting layer is transmitted between a first reflection surface and a second reflection surface. The second electrode includes light transmission parts, through which the light passes, above upper end parts of the pedestals. A surface of the second electrode facing the organic electro-luminescence film is the second reflection surface except for the light transmission parts.
1. An organic electro-luminescence display device comprising:
a substrate;
a plurality of pedestals which are provided in a convex shape on the substrate and have inclined side surfaces;
a plurality of first electrodes respectively provided on the respective side surfaces of the pedestals;
an organic electro-luminescence film which is provided above the plurality of pedestals and includes a light-emitting layer laminated on the plurality of first electrodes; and
a second electrode which is provided above the plurality of pedestals and is laminated on the organic electro-luminescence film, wherein
light generated in the light-emitting layer is transmitted between a first reflection surface and a second reflection surface,
the second electrode includes light transmission parts, through which the light passes, above upper end parts of the pedestals, and
a surface of the second electrode facing the organic electro-luminescence film is the second reflection surface except for the light transmission parts.
2. The organic electro-luminescence display device according to claim 1 , wherein surfaces of the first electrodes facing the light-emitting layer are the first reflection surface.
3. The organic electro-luminescence display device according to claim 2 , wherein the light-emitting layer includes a plurality of light-emitting layers each of which emits light of one of a plurality of colors, and
each of the plurality of light-emitting layers is laminated on one of the first electrodes.
4. The organic electro-luminescence display device according to claim 3 , further comprising an insulation layer provided between the adjacent pedestals and placed on end parts of the adjacent first electrodes.
5. The organic electro-luminescence display device according to claim 4 , wherein
a refractive index of the insulation layer is higher than that of the plurality of light-emitting layers,
end parts of the adjacent light-emitting layers are disposed to be separated from each other and to contact the insulation layer, and
the second electrode contacts the insulation layer between the adjacent light-emitting layers.
6. The organic electro-luminescence display device according to claim 1 , wherein the light-emitting layer is continuously laminated on the plurality of first electrodes and emits light of one color.
7. The organic electro-luminescence display device according to claim 6 , further comprising a color filter.
8. The organic electro-luminescence display device according to claim 6 , further comprising mirror layers arranged below the respective pedestals, wherein
the plurality of pedestals and the first electrode respectively have light transmissivity,
the plurality of pedestals include colored layers of a plurality of colors to constitute a color filter, and
surfaces of the mirror layers facing the pedestals are the first reflection surface.
9. The organic electro-luminescence display device according to claim 8 , wherein each of the mirror layers has conductivity and is electrically connected to one of the first electrodes.
10. The organic electro-luminescence display device according to claim 6 , further comprising an insulation layer which is provided between the adjacent pedestals and is placed on end parts of the adjacent first electrodes.
11. The organic electro-luminescence display device according to claim 10 , wherein
a refractive index of the insulation layer is higher than that of the light-emitting layer, and
the light-emitting layer is provided to cover the insulation layer.
12. The organic electro-luminescence display device according to claim 1 , wherein the plurality of first electrodes are provided while avoiding the upper end parts of the plurality of pedestals.
13. The organic electro-luminescence display device according to claim 12 , wherein the light-emitting layer is provided while avoiding regions above the upper end parts of the plurality of pedestals.
14. The organic electro-luminescence display device according to claim 13 , wherein
the second electrode is provided while avoiding the regions above the upper end parts of the plurality of pedestals, and
the light transmission parts are openings provided in the second electrode.
15. The organic electro-luminescence display device according to claim 1 , wherein the plurality of first electrodes are provided to be placed on the upper end parts of the plurality of pedestals.
16. The organic electro-luminescence display device according to claim 15 , wherein the light-emitting layer is provided above the upper end parts of the plurality of pedestals and is placed on the plurality of first electrodes.
17. The organic electro-luminescence display device according to claim 16 , wherein
the second electrode is provided above the upper end parts of the plurality of pedestals and is placed on the light-emitting layer, and
the light transmission parts are made of transparent conductive material.
18. The organic electro-luminescence display device according to claim 17 , wherein
the second electrode includes a transparent layer made of the transparent conductive material and a reflection layer made of material to reflect light, and
the reflection layer is laminated on the organic electro-luminescence film above the side surfaces of the plurality of pedestals while avoiding regions above the upper end parts of the plurality of pedestals.
19. The organic electro-luminescence display device according to claim 18 , wherein
the reflection layer contacts the organic electro-luminescence film, and
the transparent layer is provided to cover the reflection layer.
20. The organic electro-luminescence display device according to claim 1 , wherein
the second electrode has unevenness corresponding to shapes of the plurality of pedestals, and
a flattening film is provided in a concave part of the unevenness to have a thickness equal to a height of a convex part of the unevenness.
21. The organic electro-luminescence display device according to claim 20 , further comprising a sealing film which is provided above the second electrode and the flattening film and seals the organic electro-luminescence film.
22. The organic electro-luminescence display device according to claim 1 , wherein each of the plurality of pedestals has a truncated shape.