Perfect Computer Notes

Monitor Monitor is the most familiar output device. It is a display screen or visual display unit to show text and graphics to computer user. Common monitors look like a TV. Latest monitors are flat panel monitors like LCD monitors. Although LCD monitors are more costly than general old fashioned monitors called CRT monitors, they are light weight and don't emit radiations harmful to eyes. Types of Monitors There are the following main types of Monitors: 1. CRT Monitors 2. Flat Panel Monitors 3. Touch Screen Monitors 1. CRT Monitors CRT stands for Cathode Ray Tube. CRT monitors use electronic beam gun to produce text and images. These electronic guns fire a beam of electrons on very tiny phosphorus dots on internal surface of screen. In color CRT monitors there are three electron beam guns for Red, Green and Blue colors. CRT monitors take more space on desk. These are heavier than flat panel monitors. CRT monitors emit radiations which are harmful for human eyes