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, 2024
Filed:
Jun. 28, 2022
3m Innovative Properties Company, St. Paul, MN (US);
Kristy A. Gillette, Spring Valley, WI (US);
Zhaohui Yang, North Oaks, MN (US);
Joseph P. Attard, Woodbury, MN (US);
Martin E. Denker, Vadnais Heights, MN (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
An integral optical stack includes a lens film having first and second major surfaces. The first major surface includes microlenses having an average peak-to-valley height PV. A light absorbing layer is disposed on the lens film and defines a plurality of openings. A substantially planarizing optically diffusive layer is disposed on the first major surface of the lens film, conforming to the microlenses. The optically diffusive layer includes a plurality of nanoparticles. A polymeric material bonds the nanoparticles to each other to form a plurality of nanoparticle aggregates defining a plurality of voids therebetween. The optically diffusive layer has an average thickness greater than about 8 microns, and an index of refraction of less than about 1.25. Any non-planarity of a major surface of the optically diffusive layer due to the microlenses of the first major surface has an average peak-to-valley height PV, PV≤0.7 PV