ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,594, issued on Sept. 30, was assigned to DENKA COMPANY Ltd. (Tokyo).
"Phosphor plate and light emitting device" was invented by Yuki Kubota (Tokyo), Taiyo Yamaura (Tokyo) and Kazuhiro Ito (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A phosphor plate includes a plate-like composite including a base material and an Alpha-type sialon phosphor present in the base material, in which, in an X-ray diffraction analysis pattern using a Cu-KAlpha ray, in a case in which peak intensity corresponding to the Alpha-type sialon phosphor having a diffraction angle 2Theta in a range of 30.2deg or more and 30.4deg or less is defined as IAlpha and peak inten...