ALEXANDRIA, Va., June 16 -- United States Patent no. 12,309,897, issued on May 20, was assigned to MITSUBISHI ELECTRIC Corp. (Tokyo).

"Leaf-filtered sunlight simulation control device" was invented by Akinori Heishi (Tokyo), Satoru Okagaki (Tokyo) and Haruka Suzuki (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A leaf-filtered sunlight simulation control device includes a plurality of light sources, a single lens, and a leaf-filtered sunlight light source control module to control positions of the plurality of light sources. The leaf-filtered sunlight light source control module controls the positions of the plurality of light sources so that Fgreater thanA is satisfied, where F is a focal length of t...