ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,829, issued on May 20, was assigned to Japan Display Inc. (Tokyo).
"Illumination device and optical element" was invented by Takeo Koito (Tokyo), Tae Kurokawa (Tokyo) and Kojiro Ikeda (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is an illumination device including a light source, a first liquid crystal cell over the light source, and a second liquid crystal cell over the first liquid crystal cell. Each of the first liquid crystal cell and the second liquid crystal cell includes a first substrate, a plurality of first lower electrodes and a plurality of second lower electrodes driven independently, a first liquid crystal layer, and...