A: Technically speaking, LCDs do flicker, but the cause of the phenomenon is different
from that of a CRT monitor -- and it has no impact of the ease of viewing. Flickering in an
LCD monitor relates to usually undetectable luminance caused by the difference between
positive and negative voltage. On the other hand, CRT flickering that can irritate the
human eye occurs when the on/off action of the fluorescent object becomes visible.
Since the reaction speed of liquid crystal in an LCD panel is much slower, this
troublesome form of flickering is not present in an LCD display.
Q: Why is an LCD monitor virtually low of Electro Magnetic Interference?
A: Unlike a CRT, an LCD monitor does not have key parts that generate Electro
Magnetic Interference, especially magnetic fields. Also, since an LCD display utilizes
relatively low power, its power supply is extremely quiet.
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