ALEXANDRIA, Va., April 7 -- United States Patent no. 12,596,287, issued on April 7, was assigned to TDK Corp. (Tokyo).

"Visible light modulation device and optical engine including the same" was invented by Takashi Kikukawa (Tokyo), Tsuyoshi Komaki (Tokyo), Hideaki Fukuzawa (Tokyo) and Hiroki Hara (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A visible light modulation device includes a light source part having a plurality of optical semiconductor devices configured to emit light with a visible light wavelength of 400 nm to 700 nm, and a light modulation output part having three Mach-Zehnder type optical waveguides consisting of a convex fabricated lithium niobate film, and being configured so that l...