ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,717,197, issued on Aug. 25, was assigned to TOPPAN HOLDINGS INC. (Tokyo).
"Light control device and light control sheet" was invented by Tetsushi Yoshida (Taito-ku, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A light control sheet includes a first transparent electrode layer, a second transparent electrode layer, and a light control layer including a liquid crystal composition having positive dielectric anisotropy and including chiral nematic liquid crystals. A control unit of a light control device controls voltage applied between the transparent electrode layers to a first voltage to bring the light control sheet into a first state of reflect...