Patent · US Active

Variable index light extraction layer and method of making the same

US10139550B2 · kind B2 · utility

3Cited by

15References

8Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

David Scott Thompson · Lake Elmo, US
Shawn C. Dodds · Windom, US
Mikhail L. Pekurovsky · Bloomington, US
Kevin R. Schaffer · Woodbury, US
Matthew S. Stay · Minneapolis, US
Steven D. Solomonson · Shoreview, US
John A. Wheatley · Stillwater, US
Zhaohui Yang · Beijing, CN
Joseph W. Woody, V · Saint Paul, US

Key dates

Filing date	Aug 21, 2013
Grant date	Nov 27, 2018
Priority date	—
Expiry date	Feb 18, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/0065
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Variable index light extraction layers that contain a first region with a first material and a second region including a second material are described, where the first region has a lower effective index of refraction than the second region. Optical films and stacks may use the variable index light extraction layers in front lit or back lit display devices and luminaires.

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