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:
Jul. 07, 2026
Filed:
Sep. 08, 2023
3m Innovative Properties Company, St. Paul, MN (US);
Lin Zhao, Woodbury, MN (US);
Gilles J. Benoit, Minneapolis, MN (US);
Bharat R. Acharya, Woodbury, MN (US);
Robert D. Taylor, Stacy, MN (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
A backlight includes an illumination system having a plurality of light sources configured to emit at least red light from an emission surface, and an optical film having pluralities of first and second layers separated by at least one spacer layer. The emitted light includes a red light having a first red peak wavelength with a full width at 70% maximum FWr1. The optical film is configured such that, for a substantially normally incident light and for a first polarization state, an optical transmittance of the optical film versus wavelength has a first red-infrared transmittance peak at a first red-infrared peak wavelength of greater than about 600 nm with a red-infrared full width at 70% maximum FWri1, with the red-infrared peak wavelength being greater than the red peak wavelength by at least 10 nm, and FWri1/FWr1≥7.