US Patent Issued to DENKA on March 18 for "Phosphor, method of producing phosphor, light-emitting element, light-emitting device, and image display apparatus" (Japanese Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,256,579, issued on March 18, was assigned to DENKA COMPANY Ltd. (Tokyo).

"Phosphor, method of producing phosphor, light-emitting element, light-emitting device, and image display apparatus" was invented by Hiroaki Toyoshima (Tokyo) and Mitsuru Kawagoe (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A phosphor in which at least some of an element M in a phosphor host crystal represented by MAlpha(L, A)BetaXGamma is substituted with Eu as an activation material. M represents one or more (including at least Sr) of Mg, Ca, Sr, Ba, and Zn, L represents one or more of Li, Na, and K, A represents one or more of Al, Ga, B, In, Sc, Y, La, and Si, X repres...