What is refresh rate?
Original video frames (1 and 2) at 60 frames per second, aren’t enough to fill 120Hz and 240Hz LCDs. Duplicating the original frames is one method. Alternately, frames can be interpolated to fill the gaps. In this example, the TV’s processor creates frame 1a from the difference between 1 and 2. This (along with 2a, 3a, etc.) makes up the difference between 60Hz video and 120Hz TVs.
(Credit: Geoffrey Morrison/CNET )
With 120Hz, 240Hz, and even 600Hz, refresh rate gets a lot of attention in the marketing of new HDTVs.
What it is and how it works is interesting, but why it exists is even more…
See the article here: What is refresh rate?
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