BLUE LIGHT-EMITTING FLUORESCENT FILM, ELECTRON-BEAM EXCITATION APPARATUS AND IMAGE DISPLAY DEVICE

文件类型：PDF文档
文件大小：100K
PROBLEM TO BE SOLVED : To provide a blue light-emitting fluorescent film maintaining luminance saturation characteristics, high resolution characteristics and high luminance under excitation at a high current density and improving the luminance deterioration characteristics by irradiation of electron beams. SOLUTION : The blue light-emitting fluorescent film comprises a first phosphor composed of a ZnS phosphor and a second phosphor composed of a Tb-activated rare earth oxysulfide phosphor. The second phosphor contains a compound represented by chemical formula Ln2O2S : Tb (1) (wherein, Ln is at least partially Lu and may contain an element selected from Sc, Y and Gd).