日本松下电气公司关于直流电致发光荧光粉制备方法的一份专利说明书摘要如下: 从ZnS、ZnS和ZnSe的固溶体、ZnS和CdS的固溶体中选择一种粉末材料,浸在浓度为0.001至0.1克分了/升的铜盐液中,溶液温度是20℃至90℃,浸泡的材料要用激活剂激活,所加的激活剂包括Mn或是原子序数为58到70的稀土元素。浸泡后把粉末材料用纯净的水洗涤并烘干。 A summary of a patent specification by Matsushita Electric Corporation regarding the preparation of DC electroluminescent phosphors is as follows: A powder material is selected from a solid solution of ZnS, ZnS and ZnSe, a solid solution of ZnS and CdS, immersed in a solution of 0.001 to 0.1 gm / Liter of copper salt solution, the solution temperature is 20 ℃ to 90 ℃, soaked material to be activated with an activator, the activator added include Mn or rare earth elements with an atomic number of 58 to 70. Soak the powder material with pure water after washing and drying.