Patent · US Active

OLED light extraction films having internal nanostructures and external microstructures

US8538224B2 · kind B2 · utility

13Cited by

13References

13Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Sergey Lamansky · Redmond, US
Terry L. Smith · Plainfield, US
Jun-Ying Zhang · Perrysburg, US
Leslie A. Todero · Omaha, US
Encai Hao · Woodbury, US
Ha T. Le · Windom, US
Ding Wang · Austin, US
Fei Lu · Shanghai, CN
Shoichi Masuda · Tokyo, JP

Key dates

Filing date	Apr 22, 2010
Grant date	Sep 17, 2013
Priority date	—
Expiry date	Dec 18, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH10K2102/311
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A light extraction film having internal nanostructures and external microstructures for organic light emitting diode (OLED) devices. The light extraction film includes a flexible substantially transparent film, a low index nanostructured layer applied to the film, and a high index planarizing backfill layer applied over the nanostructured layer. External optical microstructures are applied to the flexible substantially transparent film on a side opposite the nanostructured layer to enhance light extraction from the OLED devices while providing for a more uniform luminance distribution.

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