Light emitting device
View Patent ↗A light emitting device 10 has a supporting substrate 12 ; a first electrode 14 disposed on the supporting substrate; an electroluminescent layer disposed on the first electrode and including at least a light emitting layer 16 ; a second electrode 18 disposed opposite to the first electrode, with the electroluminescent layer being interposed therebetween; a resin layer 20 disposed on the second electrode directly or with an intermediate layer interposed therebetween, or on a surface of the supporting substrate at the opposite side of a surface where the first electrode is disposed; and light transmitting particles 22 scattered in the resin layer, and at least a portion of the light transmitting particles are scattered in the resin layer such that a part of each of the scattered particles is embedded in a surface of the resin layer at the side at which light is extracted from the light emitting layer.
1. A light emitting device comprising:
a supporting substrate,
a first electrode disposed on the supporting substrate,
an electroluminescent layer disposed on the first electrode and including at least a light emitting layer,
a second electrode disposed opposite to the first electrode, with the electroluminescent layer interposed therebetween;
a sealing layer disposed on the second electrode;
a resin layer disposed on the sealing layer; and
light transmitting particles scattered in the resin layer,
at least a portion of the light transmitting particles being scattered such that a part of each of the scattered particles is embedded in a surface of the resin layer at the side at which light emitted from the light emitting layer is extracted from the resin layer, wherein
the refractive index of the light transmitting particles is higher than the refractive index of the resin layer,
the refractive index of the resin layer is lower than the refractive index of the sealing layer, and
a portion of the light transmitting particles, that are scattered in areas other than the surface of the resin layer on the side at which light is extracted from the resin layer, is in contact with the sealing layer.
2. The light emitting device of claim 1 , wherein 30% or more of the light transmitting particles are partially embedded in the resin layer, and only ¼ to ¾ of the volume of each partially embedded particle is embedded in the resin layer.
3. The light emitting device of claim 1 , wherein 30% or more of the light transmitting particles that are scattered in the resin layer are in contact with the sealing layer.
4. The light emitting device of claim 1 , wherein the resin layer also serves as a solid sealing layer.
5. The light emitting device of claim 1 , further comprising a sealing substrate.