Organic light emitting diode display
An organic light emitting diode display device includes: a substrate including a plurality of pixel regions which each include an emission region and a non-emission region around the emission region; a plurality of scattering portions disposed on the substrate, corresponding to the emission region, and spaced apart from each other; a first overcoat layer disposed on the substrate having the plurality of scattering portions and including a plurality of concave portions which respectively correspond to the plurality of scattering portions; a first electrode disposed on the first overcoat layer in each of the plurality of pixel regions; and an organic light emitting layer and a second electrode sequentially disposed on the first electrode.
1. An organic light emitting diode display device, comprising:
a substrate including a plurality of pixel regions, each of which includes an emission region and a non-emission region around the emission region;
a plurality of scattering portions disposed on the substrate, corresponding to the emission region, and spaced apart from each other;
a first overcoat layer disposed on the plurality of scattering portions, and including a plurality of concave portions which respectively correspond to the plurality of scattering portions and a plurality of convex portions which are disposed alternately with the plurality of concave portions to have a surface forming microlenses, wherein the plurality of concave portions of the first overcoat layer respectively overlap the plurality of scattering portions provided below the first overcoat layer, and the plurality of convex portions of the first overcoat layer do not overlap the plurality of scattering portions provided below the first overcoat layer, wherein the plurality of scattering portions are between the substrate and the first overcoat layer;
a first electrode disposed on the first overcoat layer in each of the plurality of pixel regions; and
an organic light emitting layer and a second electrode sequentially disposed on the first electrode,
wherein the plurality of scattering portions include a plurality of air holes, respectively, or a plurality of scattering patterns, respectively,
wherein the plurality of air holes are formed in a second overcoat layer disposed below the first overcoat layer,
wherein each of the plurality of scattering patterns includes scattering particles, and
wherein the plurality of concave portions are each recessed to a downward direction, and the plurality of convex portions are each protruded to an upward direction.
2. The organic light emitting diode display device of claim 1 , wherein a transparent electrode is disposed between the first overcoat layer and the second overcoat layer and has a plurality of holes which respectively correspond to the plurality of air holes.
3. The organic light emitting diode display device of claim 2 , wherein an air hole in the plurality of air holes and a corresponding hole in the plurality of holes have a same width.
4. The organic light emitting diode display device of claim 2 , wherein a center point of an air hole in the plurality of air holes and a corresponding hole in the plurality of holes are located to correspond to an apex of a corresponding concave portion in the plurality of concave portions.
5. The organic light emitting diode display device of claim 2 , wherein the transparent electrode is made of a metal oxide of indium tin oxide (ITO) or indium zinc oxide (IZO).
6. The organic light emitting diode display device of claim 1 , wherein a width of a scattering portion in the plurality of scattering portions is smaller than a maximum width of a corresponding concave portion in the plurality of concave portions.
7. The organic light emitting diode display device of claim 1 , wherein each of the plurality of pixel regions includes a wavelength conversion layer between the plurality of scattering portions and the substrate.
8. The organic light emitting diode display device of claim 7 , wherein each of the plurality of pixel regions includes a driving thin film transistor.
9. The organic light emitting diode display device of claim 1 , wherein each of the first electrode, the organic light emitting layer and the second electrode has a shape corresponding to a shape of the surface of the first overcoat layer forming microlenses.
10. The organic light emitting diode display device of claim 1 , wherein the first overcoat layer includes a plurality of open holes respectively exposing the plurality of scattering patterns, and
wherein the first electrode includes a plurality of portions which contact the plurality of scattering patterns through the plurality of open holes, respectively.
11. The organic light emitting diode display device of claim 1 , wherein each of the plurality of scattering patterns has a flat top surface.
12. The organic light emitting diode display device of claim 1 , wherein the plurality of concave portions are located closer to the substrate than the plurality of convex portions are.
13. The organic light emitting diode display device of claim 1 , wherein the scattering pattern is disposed at a region corresponding to the concave portion of the first overcoat layer.