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Definition of CRT

The basis of the television screen and the standard microcomputer display screen. A CRT display is built around a vacuum tube containing one or more electron guns whose electron beams rapidly sweep horizontally across the inside of the front surface of the tube, which is coated with a material that glows when irradiated. Each electron beam moves from left to right, top to bottom, one horizontal scan line at a time. To keep the screen image from flickering, the electron beam refreshes the screen 30 times or more per second. The clarity of the image is determined by the number of pixels on the screen.

Computer Science

Other definitions of CRT

(Cathode Ray Tube)- The imaging technology used in older desktop monitors. Provides an excellent colour display, but is extremely bulky and is widely being replaced by flatscreens.

Computer Science