Definitionof indication of CRT display the index which is displayed.WithCRTof aperturegrille system, it is shortest distance between the fluorescent substance of the same color on the fluorescent screen. The extent where this value is small the picture indication which is fine is possible.WithCRT displayof shadowmask system, the index,"dotpitch " is used in place of this.With aperture grille system, as for the fluorescent substance of the same color because in vertical direction it has been connected in the belt shape, as for AG pitch it becomes horizontal distance between 2 these fluorescent bands, by comparison with the dot pitch of the shadowmask system CRT whichalmosthasequal efficiency, value of the small awakening appears. Because of this, it cannot compare AG pitchand dot pitch simply.