abstract |
PROBLEM TO BE SOLVED: To provide a display screen having a luminous layer characterized by being optimal in brightness, sharpness and adhesion, having a minimum level of color impurity and being free from fogging. . SOLUTION: Magnesium, calcium, barium, A phosphor composition of a phosphor coated with an oxygen compound of one of zinc and aluminum and colloidal SiO 2 having an average particle size of 70 nm ≦ d ≦ 130 nm. A display screen comprising a phosphor layer having the composition. |