CRT computer monitor

This older type of monitor is functionally based on a cathod ray tube (thus CRT). It is used to display pixel graphics generated by a computer's video card.

The monitor comprises the display device (“tube”), simple circuitry to generate and format a picture from video sent by the signals source, and usually an enclosure.

History
The functional principle of the CRT monitor is based on the “Brown tube”, an electron ray tube with a phosphor-coated and thus fluorescing screen.