US Patent Issued to 3M Innovative Properties on Feb. 17 for "Optical light redirecting stack including light redirecting layers with truncated structures" (Minnesota Inventors)

ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,555,405, issued on Feb. 17, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Optical light redirecting stack including light redirecting layers with truncated structures" was invented by David A. Rosen (North Saint Paul, Minn.) and Bharat R. Acharya (Woodbury, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical stack includes stacked first and second light redirecting layers, each light redirecting layer including a plurality of truncated first structures, each truncated first structure with opposing side surfaces making an angle of between about 60 degrees to about 120 degrees with each other and a substantially planar top s...