Analog signal A signal that conveys the intensity of each color for a given pixel via variations in voltage.

Aperture grille A set of vertical metal bars that directs the electron beam in a CRT so that it strikes only the phosphors of a desired color.

Cathode-ray tube (CRT) A vacuum tube technology used in some computer displays as well as televisions.

Digital signal A signal that uses a sequential stream of binary data-on and off signals-to convey the intensity of each color for a given pixel.

Dot pitch The distance on a CRT between the center of a phosphor dot of a given color and the center of the next nearest dot of the same color.

Liquid crystal display (LCD) A constant display that uses thin layers of special materials to block or transmit light to create an image.

Phosphor A chemical compound that emits light when excited by electrons. Different formulations produce lights of different colors.

Shadow mask A sheet of metal with round holes across its surface, used to direct the electron beam in a CRT so that it strikes only the phosphors of a desired color.

Stripe mask A metal grille that directs the electron beam in a CRT so that it strikes only the phosphors of a desired color.

Stripe pitch The distance on a CRT from the center of a phosphor stripe of a given color to the center of the next stripe of the same color.