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US 2015/0144978 A1Published application
Light Extraction Element
AssigneeNitto Denko Corporation
InventorsHiroaki Miyagawa, Bin Zhang
Life of this patent
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Abstract
Described herein are elements for light emitting devices comprising: an emissive element comprising a host material and an emissive guest material and substantially free of light scattering material; and a light scattering element comprising either a non-emissive or an emissive material, wherein the light scattering element is between about 2.5% to about 60% by volume voids and the thickness ratio of light scattering element to the emissive element is at least 1 to about 2.
Claims15
A light emitting element comprising:
- an emissive element comprising a host material and an emissive guest material, the emissive element substantially free of light scattering material;
- and
- a light scattering element comprising either a non-emissive or an emissive material, wherein the light scattering element is between about 2.5% to about 60% by volume voids and the thickness ratio of light scattering element to the emissive element is less than about 1:2.
Dependencies are inferred from the claim text.