By Georgia Chilvers


A monitor or a display is an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors use a cathode ray tube (CRT) about as deep as the screen size.

Originally, computer monitors were used for data processing while television receivers were used for entertainment. From the 1980s onwards, computers (and their monitors) have been used for both data processing and entertainment, while televisions have implemented some computer functionality. The common aspect ratio of televisions, and then computer monitors, has also changed from 4:3 to 16:9 (and 16:10).


Today's monitors have a long history, spanning from the first personal computer to today's big-screen LCD. Along the way, innovations enabled growth of PCs as well as industries, such as computer gaming. Current LCD computer monitors now outnumber the original CRT screen. Screens now displaying millions of colours for complex graphics began with just two for basic text.