The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2012
Filed:
Jun. 01, 2011
John E. Potts, Woodbury, MN (US);
Fred B. Mccormick, Maplewood, MN (US);
Martin B. Wolk, Woodbury, MN (US);
Jun-ying Zhang, Woodbury, MN (US);
Terry L. Smith, Roseville, MN (US);
James M. Battiato, Austin, TX (US);
Ding Wang, Austin, TX (US);
William A. Tolbert, Woodbury, MN (US);
Mark A. Roehrig, Stillwater, MN (US);
Clark I. Bright, Tucson, AZ (US);
John E. Potts, Woodbury, MN (US);
Fred B. McCormick, Maplewood, MN (US);
Martin B. Wolk, Woodbury, MN (US);
Jun-Ying Zhang, Woodbury, MN (US);
Terry L. Smith, Roseville, MN (US);
James M. Battiato, Austin, TX (US);
Ding Wang, Austin, TX (US);
William A. Tolbert, Woodbury, MN (US);
Mark A. Roehrig, Stillwater, MN (US);
Clark I. Bright, Tucson, AZ (US);
3M Innovative Properties Company, Saint Paul, MN (US);
Abstract
A multifunctional optical film for enhancing light extraction includes a flexible substrate, a structured layer, and a backfill layer. The structured layer effectively uses microreplicated diffractive or scattering nanostructures located near enough to the light generation region to enable extraction of an evanescent wave from an organic light emitting diode (OLED) device. The backfill layer has a material having an index of refraction different from the index of refraction of the structured layer. The backfill layer also provides a planarizing layer over the structured layer in order to conform the light extraction film to a layer of an OLED lighting device such as solid state lighting devices or backlight units. The film may have additional layers added to or incorporated within it to an emissive surface in order to effect additional functionalities beyond improvement of light extraction efficiency.