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. 01, 2013
Filed:
Oct. 20, 2010
Martin B. Wolk, Woodbury, MN (US);
Sergey Lamansky, Apple Valley, MN (US);
William Blake Kolb, West Lakeland, MN (US);
Encai Hao, Woodbury, MN (US);
Jun-ying Zhang, Woodbury, MN (US);
David S. Thompson, West Lakeland, MN (US);
Vivan W. Jones, Woodbury, MN (US);
Kevin R. Schaffer, Woodbury, MN (US);
Audrey A. Sherman, Saint Paul, MN (US);
Zhaohui Yang, North Oaks, MN (US);
Leslie A. Todero, Saint Paul, MN (US);
Martin B. Wolk, Woodbury, MN (US);
Sergey Lamansky, Apple Valley, MN (US);
William Blake Kolb, West Lakeland, MN (US);
Encai Hao, Woodbury, MN (US);
Jun-Ying Zhang, Woodbury, MN (US);
David S. Thompson, West Lakeland, MN (US);
Vivan W. Jones, Woodbury, MN (US);
Kevin R. Schaffer, Woodbury, MN (US);
Audrey A. Sherman, Saint Paul, MN (US);
Zhaohui Yang, North Oaks, MN (US);
Leslie A. Todero, Saint Paul, MN (US);
3M Innovative Properties Company, Saint Paul, MN (US);
Abstract
Optical films for enhancing light extraction from self-emissive light sources such as bottom-emitting or top-emitting OLEDs are disclosed. The extraction films typically include a flexible carrier film, and a first and second layer carried by the carrier film. The first or second layer has a nanovoided morphology and includes a polymer binder, and may also have a refractive index less than 1.35 or 1.3. An embedded structured surface of light extraction elements is formed between the first and second layers. The light extraction elements may be primarily diffractive elements adapted to be disposed within an evanescent zone of the OLED, or they may be primarily refractive elements adapted to be disposed outside the evanescent zone. The extraction film may also include a third layer, and a second embedded structured surface may be formed between the third layer and the first layer.