ALEXANDRIA, Va., June 6 -- United States Patent no. 12,282,229, issued on April 22, was assigned to TOPPAN HOLDINGS INC. (Tokyo).
"Light control window" was invented by Ryuji Shiraishi (Taito-ku, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A light control sheet includes an adhesive layer attached to a transparent material, and a light control layer attached to the transparent material via the adhesive layer, the light control layer having a transparent state or an opaque state depending on a voltage is applied to the light control layer. At least one of the adhesive layer and the light control layer includes a filter absorbing part of light in the visible region. Transmittance is 10% or less for lig...