What is the difference between dot pitch and aperture grille?
Monitors create colors with red, green, and blue phosphors. By lighting them up in different intensities, the display creates the illusion of other colors. In the vast majority of tubes, these colored phosphors repeat in patterns, with alternating rows offset from each other. Dot pitch is the distance, center to center, between the two closest dots of the same color; each set of three of the closest red, green, and blue dots is called a triad. Notice that a given dot lies halfway between dots of the two other colors in the row below. Each dot also lies directly above the same color dot two rows below. Shadow Mask In most CRTs, the vertical dot pitch – the vertical distance between the centers of two same-colored dots – matches the diagonal dot pitch, which is the distance between either dot and the closest same-colored dot on the row between the two. Draw lines between the three dots, and you get an equilateral triangle. You can see the difference by examining the horizontal component
