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by mrob 540 days ago
It's to reduce sample-and-hold blur. Modern displays typically produce a static image that stays visible for the whole frame time, which means the image formed on your retina is blurred when you move your eyes. CRTs instead produce a brief impulse of light that exponentially decays, so you get a sharp image on your retina. Blurbusters has a good explanation:

https://blurbusters.com/faq/oled-motion-blur/