Originally Posted by AMDinside
Thanks ES_Revenge & walford.
But how come LG says these TVs can do what they call "24p Real Cinema" aka (5:5/2:2 Pulldown) on TVs that is are 60Hz.
In that case the TVs are able to refresh the panel at 120Hz, the TV just doesn't have a 120Hz motion enhancer feature (a useless feature IMO anyway because it just makes things look stupid--"soap opera effect").
So they are 120Hz TVs if they are doing 5:5 but they are marketed
as 60Hz because they didn't include a motion interpolation feature. The text you quoted in your third post is exactly what I meant in my post. Motion interpolation/enhancer features are not the same thing as a panel that actually refreshes at 120Hz.
Let's start with the fact that consumer TVs all only accept up to 60Hz on their inputs. Many TVs have 24Hz (or 23.9xx if you prefer) input capability as well. But if the screen actually refreshed that slow you would notice flicker. So no screen actually refreshes at 24Hz. By the same token just because you can only feed up to a 60Hz input doesn't mean the panel is necessarily refreshing at 60Hz either. So TVs can run "internally" at some other refresh rate, one that is usually not published. What is published is simply the motion enhancer features which some sets have. This is what determines the "hertz rating" of a TV in the consumer marketplace. That rating however is not necessarily what the TV refreshes at.
If you do have a "120Hz" or "240Hz" enhancer on the TV, then you know the panel has to be able to refresh at least that fast, otherwise the feature would be useless (well I think it is anyway but I mean ineffective in this context). However
, just because the panel refreshes at 120Hz or more does not
mean you also get a 5:5 on a 1080p24 signal. That should
be the case but there are examples where some manufacturers/models have not done this.
Assuming that you can input a 24Hz signal (if you couldn't this is all moot because there's no way you'd be able to get 5:5 then)...
"120Hz" means you have a panel that is capable of refreshing at least up to 120Hz. It says nothing about 5:5 pulldown. It might do this, or it might not.
"60Hz" (or the lack of mention of 120Hz or 240Hz) means you have a TV that is capable of refreshing at least that fast; but you don't know
if it can/is refreshing faster than that. The set may be capable of refreshing at 120Hz+ despite the fact that there is no motion enhancer for 120Hz. Again though this says nothing about whether it can do 5:5 or not.
If you know for sure the set does 5:5, then you know the panel is refreshing at 120Hz. This is regardless of, and separate from, the presence of a "120Hz" or "240Hz" mode on the TV (motion enhancer).
This is the best of my understanding from everything I've read online both here at AVS and elsewhere. I'm pretty sure I'm correct in the above, though it's possible I'm mistaken.
Hopefully that clears it up?
Originally Posted by AMDinside
It's not really deception, but it is misleading. Pretty much all TV manufacturers describe a TV's "hertz" by what motion enhancer it has. If it has none it's a "60Hz" TV, if it has that feature it will be "120Hz" or "240Hz" or whatever. That hertz figure is not necessarily the native or internal refresh rate of the TV/panel. As someone else pointed out above the panel may even operate at 48Hz when a 24Hz input is received (2:2), but nowhere will you ever see a TV sold as "48Hz". It's either sold as "60Hz" or "120Hz" or "240Hz" based entirely on what motion enhancer it has.