ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,677, issued on Feb. 24, was assigned to CoorsTek GK (Tokyo).
"Ceramic phosphor plate" was invented by Kosuke Kimura (Kanagawa, Japan) and Masaki Irie (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a ceramic phosphor plate including: a ceramic substrate having a light incident surface and a light emitting surface facing the light incident surface; and an antireflection film formed at least on the light emitting surface, in which the light emitting surface of the ceramic substrate has an uneven shape including a concave portion and a convex portion, the light emitting surface has an arithmetic mean rou...