Monitor Operation

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Monitor Operation-How do they work? The computer reserves a section of memory (video memory) to store the color and intensity of each dot. This information gets sent to the monitor 60-70 times per second (called the “refresh rate”). The monitor takes this information and, using three beams of electrons (red, green and blue) excites the phosphor inside the tube. The higher the number for a particular color, the more electrons get sent to that dot, the brighter the color. Please note that there’s no such thing as a “green electron”. The inner lining of the tube has has thousands (millions?) of individual red, green and blue dots. And, the three electron “guns” point to their assigned dots.
Older monitors expected a specific rate of incoming data. So, if you tried to display 1024×768 on an old monitor, you may not see anything at all (since they were 640×480 or 800×600 only). A “multisync monitor”, on the other hand, automatically senses the frequency and adapts to display it. So, if you heard a “click” or some other strange noise when you switch from plain text to graphics, don’t worry: it’s likely just adusting to meet your needs. (However, if you hear this sound again and again or the monitor acts erratically, quickly reboot or turn off your computer!)

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