Computer Hardware Terms, Glossary and Dictionary

Cathode-ray tube (CRT) is the technology used in most traditional televisions and computer display screens. A CRT works by moving an electron beam back and forth across the back of the screen. Each time the electron beam makes a pass across the screen, it lights up phosphor dots on the inside of the glass tube, thereby illuminates the active portions of the screen. By drawing many such lines from the top to the bottom of the screen, it creates an entire screenful of images.

Related Terms

CRT: Cathode-ray tube