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Light-extraction element including raspberry-like particles

  • US 9,391,299 B2
  • Filed: 12/09/2013
  • Issued: 07/12/2016
  • Est. Priority Date: 05/08/2013
  • Status: Active Grant
First Claim
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1. A light-extraction element, comprising:

  • a light-diffusion layer, the light-diffusion layer comprising;

    a resin; and

    a plurality of raspberry-like particles uniformly dispersed in the resin, wherein the raspberry-like particles feature a surface contour with a plurality of round bumps, and the plurality of raspberry-like particles are composed of a material having a single reflective index, wherein the plurality of raspberry-like particles per se are primary particles and has a homogeneous cross-section, wherein the homogeneous cross-section has no interface, wherein the raspberry-like particles are used as diffusion materials in the light-extraction element and the scattering caused by the surface contour of the raspberry-like particles enhances the light-extraction efficiency and reduces the color shift.

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