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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.:

US 10295724 B1

PDFFull Text
Date of Patent:
May. 21, 2019

Filed:

Oct. 13, 2016

Back-lit transmissive display having variable index light extraction layer

Applicant:

3m Innovative Properties Company, St. Paul, MN (US);

Inventors:

David Scott Thompson, Bayport, MN (US);

Kevin R. Schaffer, Woodbury, MN (US);

Zhaohui Yang, North Oaks, MN (US);

Encai Hao, Woodbury, MN (US);

Audrey A. Sherman, Woodbury, MN (US);

Michael A. Meis, Stillwater, MN (US);

John A. Wheatley, Lake Elmo, MN (US);

Matthew S. Stay, Minneapolis, MN (US);

Robert F. Kamrath, Mahtomedi, MN (US);

Mikhail L. Pekurovsky, Bloomington, MN (US);

Steven D. Solomonson, Shoreview, MN (US);

Assignee:

3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);

Attorney:

Clifton F. Richardson

Primary Examiner:

Anh T Mai

Assistant Examiner:

Zachary J Snyder

Int. Cl.
CPC ...
F21V 8/00 (2006.01); F21L 4/02 (2006.01); F21L 4/08 (2006.01); F21S 6/00 (2006.01); F21S 9/02 (2006.01); F21V 3/00 (2015.01); F21V 15/01 (2006.01); F21V 15/04 (2006.01); F21V 23/04 (2006.01); F21V 23/06 (2006.01); F42B 12/42 (2006.01); F21W 131/40 (2006.01); F21Y 101/00 (2016.01); F21Y 105/14 (2016.01); F21Y 107/40 (2016.01); F21Y 115/10 (2016.01); F21S 8/08 (2006.01); F21V 19/04 (2006.01); F21V 23/00 (2015.01); F21V 21/116 (2006.01);
U.S. Cl.
CPC ...
G02B 6/005 (2013.01); G02B 6/0055 (2013.01); G02B 6/0056 (2013.01); G02B 6/0066 (2013.01); G02B 6/0043 (2013.01); G02B 6/0058 (2013.01);
Abstract

This application describes a back-lit transmissive display including a transmissive display and a variable index light extraction layer optically coupled to a lightguide. The variable index light extraction layer has first regions of nanovoided polymeric material and second regions of the nanovoided polymeric material and an additional material. The first and second regions are disposed such that for light being transported at a supercritical angle in the lightguide, the variable index light extraction layer selectively extracts the light in a predetermined way based on the geometric arrangement of the first and second regions. The transmissive display may be a transmissive display panel or a polymeric film such as a graphic.

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