PURPOSE: To achieve correspondence to full color display and enhance reliability by covering phosphor powder made of mainly a compound of groups II-VI with a material made of the same material, and providing a light emitting layer where the phosphor powder is dispersed in an organic binder.

CONSTITUTION: A compound of II-VI groups generally used for an electroluminescence phosphor material is desirable for a phosphor material for a phosphor powder particle 1, wherein a particle diameter is preferably from microns to tens of microns, more preferably 0.1-10μm, and most preferably 0.5-2μm. An organic metal compound is used as a covering material 2, which is solved in an organic solvent into a liquid or gel state. The particles 1 are dispersed, and baked at temperatures higher than that where the organic compound is thermally decomposed. The resultant organic substance is removed. Powder of the covered particle 1 is dispersed in an organic binder, thus forming a film as a light emitting layer. The dispersing method and the method for forming the light emitting layer may be the same as those of a conventional dispersing type electroluminescence.