· From Love and Limerence
LCDs have an "always on" pixel working, that simply changes when it needs to (and it's ability to change is much slower than a CRT).So how come 60Hz on CRTs looks like crap but on LCDs looks fine? The screen's still getting refreshed 60 times a second in both so why the difference?
CRTs update every time no matter what. They're also not always on, and the phosphors are insanely fast, so unless it's updating enough times per second (75Hz minimum, but preferably 85Hz), you'll see the "off time" between each and every Hz and your eye perceives it as flicker, since it happens so quickly.