ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,478, issued on June 3, was assigned to Japan Display Inc. (Tokyo).
"Lighting device" was invented by Kojiro Ikeda (Tokyo), Takeo Koito (Tokyo) and Keiji Takizawa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lighting device includes a light source including at least two types of light emitting elements with different color temperatures, an optical element including a plurality of liquid crystal cells and configured to control a distribution of light emitted from the light source, and a control unit configured to control the light source. The control unit controls the optical element to change from a first light distribution state to a secon...