Light emitting device and display panel
A light emitting device includes a substrate, a patterned light-scattering layer, and an electroluminescent device. The patterned light-scattering layer is disposed on a portion of the substrate. The patterned light-scattering layer has a bottom surface in contact with the substrate, a top surface opposite to the bottom surface, and a plurality of sidewalls connecting the bottom surface and the top surface. The electroluminescent device is at least disposed on the sidewalls.
1. A light emitting device comprising:
a substrate;
a patterned light-scattering layer disposed on a portion of the substrate, wherein the patterned light-scattering layer has a bottom surface in contact with the substrate, a top surface opposite to the bottom surface and a plurality of sidewalls connecting the bottom surface and the top surface; and
an electroluminescent device at least disposed on the sidewalls of the patterned light-scattering layer, wherein the electroluminescent device comprises:
a first electrode layer disposed on the top surface and the sidewalls of the patterned light-scattering layer;
an organic electroluminescent stacked layer disposed on the first electrode layer; and
a second electrode layer disposed on the organic electroluminescent stacked layer.
2. The light emitting device as claimed in claim 1 , wherein the patterned light-scattering layer is comprised of:
a transparent photoresist having a first refractive index; and
a scattering material having a second refractive index, wherein the first refractive index is different from the second refractive index.
3. The light emitting device as claimed in claim 2 , wherein the first refractive index is higher than the second refractive index.
4. The light emitting device as claimed in claim 2 , wherein the second refractive index is higher than the first refractive index.
5. The light emitting device as claimed in claim 1 , wherein the bottom surface and one of the sidewalls form an included angle which is an acute angle.
6. The light emitting device as claimed in claim 5 , wherein the acute angle ranges from about 5° to about 65°.
7. The light emitting device as claimed in claim 1 , wherein a haze of the patterned light-scattering layer is greater than 10%.
8. The light emitting device as claimed in claim 1 , wherein a thickness of the patterned light-scattering layer ranges from 0.1 to 30 times a thickness of the electroluminescent device.
9. The light emitting device as claimed in claim 1 , wherein the patterned light-scattering layer is a meshed patterned light-scattering layer.
10. The light emitting device as claimed in claim 1 , wherein the patterned light-scattering layer comprises a plurality of stripe patterned light-scattering layers.
11. The light emitting device as claimed in claim 1 , wherein an area of the top surface is smaller than an area of the bottom surface.
12. The light emitting device as claimed in claim 11 , wherein
the first electrode layer is further disposed on a portion of the substrate which is not covered by the patterned light-scattering layer.
13. The light emitting device as claimed in claim 1 , wherein the acute angle ranges from about 5° to about 65°.
14. A display panel comprising:
a substrate;
a patterned light-scattering layer disposed on a portion of the substrate, wherein the patterned light-scattering layer has a bottom surface, a top surface opposite to the bottom surface and a plurality of sidewalls connecting the bottom surface;
an electroluminescent device at least disposed on the sidewalls, wherein the electroluminescent device comprises:
a first electrode layer disposed on the top surface and the sidewalls of the patterned light-scattering layer;
an organic electroluminescent stacked layer disposed on the first electrode layer; and
a second electrode layer disposed on the organic electroluminescent stacked layer; and
at least a switching device electrically connected to the electroluminescent device.
15. The light emitting device as claimed in claim 14 , wherein the first electrode layer is further disposed on a portion of the substrate which is not covered by the patterned light-scattering layer.