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:
Aug. 11, 2026
Filed:
Jun. 20, 2023
3m Innovative Properties Company, St. Paul, MN (US);
Adam D. Haag, Woobury, MN (US);
Sun-Yong Park, Gyeonggi-do, KR;
Timothy J. Nevitt, Red Wing, MN (US);
Brianna N. Wheeler, Bloomington, MN (US);
Jody L. Peterson, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A partial reflector including a plurality of optical repeat units where each optical repeat unit includes first and second polymer layers is described. A refractive index difference between the first and second polymer layers along a first axis may be Δny, a refractive index difference between the first and second polymer layers along an orthogonal second axis may be Δnx, where |Δnx| is at least 0.1 and |Δny| is no more than 0.04. The optical repeat units may have a smallest optical thickness T1 proximate a first side of the optical stack and a largest optical thickness T2 proximate an opposite second side of the optical stack, where (T2−T1)/(T2+T1) can be a range of 0.05 to 0.2, and T2 can be at least 350 nm and no more 1250 nm. The partial reflector may be used in a circular polarizer for correcting color shift with view angle in a display.