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Old 01-11-2008   #3
Join Date: Nov 2007
Location: Southern California
Posts: 54
Default Re: Newbie here. ? about motion blur

Motion blur occurs because the liquid crystals have to "twist" open and closed. The best LCDs has a 2ms response time. This means from "open" to "closed," the crystal will have about 4ms. The image doesn't fully disappear until the pixel re-opens so you have about 6ms. There are different reports, but the eye can detect between 4 and 6 ms. This is where smearing occurs.

Plasma doesn't lag at all, it operates at the speed of electricity. This is why plasma doesn't have motion blur.

I'm sorry to say that 120Hz doesn't defeat motion blur, in fact most panels create 4 frames for every 1 frame shown instead of just showing the 1 frame 5 times. This helps hide the blur, but it's still there. Some people find the 120Hz image looks weird so they turn it off. I find it looks fine for video sources but I haven't had enough time with film sources and the XBR4 to make a decision there.
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