IMAGE DISPLAY AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To improve the luminous efficiency of a phosphor itself by solving density extinction caused by the localization of an activator in a matrix crystal of a conventional phosphor obtained by a solid phase method and the low coverage on the surface of a substrate due to the non-uniformity of particle shape and diameter and to provide a high-luminance image display fitted with a phosphor of a high coverage. SOLUTION: A high-luminance image display can be obtained by applying a phosphor 1A being spherical and having a uniform particle diameter. The phosphor 1A is the one obtained by emulsifying or spraying a sol prepared by hydrolyzing and polymerizing a matrix 3 of a phosphor 1A and a metal alkoxide containing constituent elements of an activator 2, an organic acid metal compound, a metal complex or a metal salt, or the like and in which the constituent metals are uniformly mixed on a molecular level, and heating and firing the sol and in which the activator 2 is uniformly dispersed in the matrix crystal 3.