Organic electroluminescent display device with projecting structure layer
View Patent ↗The present invention relates to an organic electroluminescent display device in which luminance and emission efficiency may be improved by forming light emitting elements of the organic electroluminescent display device in a projecting structure and provides an organic electroluminescent display device comprising a projecting structure layer formed on an insulating substrate; first electrode formed in a projecting structure on the substrate including the projecting structure layer; an organic layer formed on the first electrode; and second electrode formed on the insulating substrate, wherein the second electrode may be formed in a projected shape by the projecting structure layer so that the second electrode surrounds the organic layer.
1. An organic electroluminescent display device, comprising:
a projecting structure layer formed on an insulating substrate;
a first electrode disposed on the projecting structure layer such that the first electrode has a projected shape in a perpendicular direction to the insulating substrate;
an organic layer formed on the first electrode; and
a second electrode formed on the insulating substrate,
wherein the second electrode is formed in a projected shape by the projecting structure layer so that the second electrode surrounds the organic layer.
2. The organic electroluminescent display device according to claim 1 ,
wherein a part of the second electrode is positioned under the lower surface of a flat region of the first electrode.
3. The organic electroluminescent display device according to claim 1 ,
wherein the projecting structure layer is formed of a material having substantially the same refractive index as that of the first electrode.
4. The organic electroluminescent display device according to claim 3 ,
wherein the projecting structure layer is formed of a material having a refractive index of 1.0 to 1.7.
5. The organic electroluminescent display device according to claim 1 ,
wherein the projecting structure layer is formed of an organic material selected from the group consisting of BOB, acryl based curing resin, phenol based curing resin and polyimide.
6. The organic electroluminescent display device according to claim 1 ,
wherein the projecting structure layer is formed of silicon oxide or silicon nitride.
7. The organic electroluminescent display device according to claim 1 ,
wherein the projecting structure layer is formed of an organic and inorganic composite material of ormocer, aerosol or porous silicon dioxide.
8. The organic electroluminescent display device according to claim 1 ,
wherein the projecting structure layer has a thickness of 300 nm to 10 μm.
9. The organic electroluminescent display device according to claim 1 ,
wherein the projecting structure layer has a gradient of 15 degrees to 70 degrees.
10. The organic electroluminescent display device according to claim 1 , wherein the organic layer is formed on an upper part of the first electrode a part of which is exposed by a pixel defined layer, and the pixel defined layer is thinner than the projecting structure layer.