Theory of CRT Operation
The CRT display dates back to the invention of television and has been in use for about 70 years. CRT displays designed for use with computers are built to higher specifications than those designed for television. Since computers are commonly used for word processing and other detailed work, computer displays must be able to present users with readable text at comparatively small font sizes without causing eyestrain that would limit their effective use.
A CRT display is composed of a vacuum tube with an electron beam generator inside. In a color CRT, several magnetic fields precisely focus three electron beams, shot from this electron “gun,” to strike specific points on a luminescent screen. The electron beams hit luminescent ...
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