ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,724,337, issued on Sept. 1, was assigned to SEIKO EPSON Corp. (Tokyo).

"Wavelength conversion device, light source device, and projector" was invented by Kosuke Tabayashi (Azumino, Japan) and Norikazu Kadotani (Azumino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wavelength conversion device includes a rotating body having a disk-like shape, a wavelength converter disposed in a portion at circumferential edge side of the rotating body so as to form a ring-like shape centering on a rotational axis of the rotating body, and a motor configured to rotate the rotating body, wherein the rotating body includes a vapor chamber, the vapor chamber incl...