Patent · US Active

Advanced light extraction structure

US10516140B2 · kind B2 · utility

3Cited by
6References
33Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 26, 2018
Grant dateDec 24, 2019
Priority date—
Expiry dateJun 26, 2038

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH10K59/873
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

Light-emitting devices and methods of making the same are described whereby lenses of any array include a material with a higher refractive index than an encapsulation layer of a substrate layer, the refractive index of the material being in a range of greater than 1.7 to 1.9 at 400 nm. The material forming the lenses includes nanocomposite comprised of inorganic nanocrystals and a polymeric matrix, wherein the nanocrystals are selected from the group consisting of ZrO2, ZnO, MgO, HfO2, NbO5, Ta2O5 and Y2O3. A 3-4 micron thick sample of the nanocomposite has an optical transmittance of at least 80% over a range of 440 nm to 800 nm.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.