Why Do LED TV's Look Fast?

  • Thread starter Crispy
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Crispy

Crispy

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crispychicken49
crispychicken49
I am a person that has lived my life without an LED Flatscreen TV. I have just gone with Lamp TV's, which is just fine by me. Today, we got our new Sony Flatscreen LED, and for some reason, when I look at the LED TV (Any LED TV) it looks fast. Not that I'm complaining, I actually like it better, its just a difference and its bugging me why it feels like it. Its not the Refresh Rate, because its the same as the one on my Projection Lamp TV, and I've noticed it on 240hz LED TV. If someone knows why it appears like this, please let me know. It'll help me sleep tonight. :lol:
 
Like Grayfox said, the refresh rate is higher so movement is a lot smoother. It looks weird at first but once you're used to it you'll get really annoyed watching older sets as you'll notice the drop in framerate :lol:
 
It's because LED TV's artificially speed up the image (by holding some back) to make up for the image lag / motion blur which all LCD based screens suffer from. Its using a lot of processing which can make the image appear slightly unnatural.

Every single LCD TV I have seen on display in shops looks like the image is being fast forwarded like x1.5 times especially in movies. Disable it if you can.
 
Yeah I hate that stuff, movies look like documentaries and if your TV isn't good at this stuff (like mine) it can lead to very annoying stuttering especially in games.
 
Mess about with your settings, I found mine had independent De-blur and De-judder controls which helped. Calibrating it might be a good idea, av forums should give you settings and stuff.
 
My Sony LED tv is the same when you have motion-flow turned on. This is due to your TV trying to replicate 24 frames per second. TV's run at 30 frames per second so obviously 24 doesn't go into 30 that easily, so the manufacturers use something called 2.3 pull down; the problem with this is that you get a juddering image that just looks poor so TV manufactures have systems like motion-flow, so to improve 2.3 they use higher refresh rates namely multiples of 24 to try and get closer to that 24 frames per second.

So your tv is basically doing a reverse Telecine To 23.976 frames per second it multiplies that by five to get close to 120htz refresh rate. Which is a multiple of 30 of your tv but because of the extra fodder inserted to try and clean this up your image to your eyes will look speeded up until you get used to seeing it, some companies have better systems than others which aren't as obtrusive. Also systems can introduce artefacts too into the image especially of poor quality signal.

Another note is when you play a game at 60fps it looks natural on your TV but with all the settings for movies turned on it look just plain weird, so TV manufactures have a game mode for specifically turning everything off, this will also increase response times.
 
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Red-Rice
Mess about with your settings, I found mine had independent De-blur and De-judder controls which helped. Calibrating it might be a good idea, av forums should give you settings and stuff.
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Already done, it still starts to stutter with 100hz Motion+, I haven't noticed any real improvement anyway.
Sprite
*snip*
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(just in case you were also responding to me) Yeah I know all of that and the game mode in my TV (Samsung UE40B6000) sucks pretty hard, I don't have any issues with input lag, so why should I use it? Also, I can use different settings for all input sources, my digital TV channels have a slightly different setting than my PS3 channel and I also can set up my analog TV input (which I fortunately don't have to use anymore) with different colors etc.
 
G.T.Ace
(just in case you were also responding to me) Yeah I know all of that and the game mode in my TV (Samsung UE40B6000) sucks pretty hard, I don't have any issues with input lag, so why should I use it? Also, I can use different settings for all input sources, my digital TV channels have a slightly different setting than my PS3 channel and I also can set up my analog TV input (which I fortunately don't have to use anymore) with different colors etc.
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I agree, I have my PS3 in HDMI 1 which is also my main blu-ray source so unfortunately I don't have the luxury to have alternate settings per source just yet but each individual source imput can have it's own setting I just need a stand alone blu-ray player. The game mode on my set also isn't the greatest so I never use it, I have my set calibrated for blu-ray and I just have to deal with inconsistent game issues ie colour calibration and frame rate issues.

Imput lag is a bit of a personal preference, I don't notice imput lag as some people do so having the same source with motion-flow on doesn't effect me too much, it also seems to elevate the tearing people notice in games like GT5, at the end of the day your have you TV set to how you like it, personally I watch more films on my TV than I do play games so it's setup for that.
 
For what its worth Plasma's do not suffer problems like this because they have a response time similar to CRT TV's which is something like 0.002 milliseconds which is basically instant. So if anyone finds the motion enhancement on LCD's really annoying this might be a technology worth considering.

Robin.
 
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.... I never quite understood how plasma, if you think about it, was almost as fast as CRT with their lights. Surely, LCD, being more digital with their lights coloured stuff, would be faster than plasma?
 
Submerged
.... I never quite understood how plasma, if you think about it, was almost as fast as CRT with their lights. Surely, LCD, being more digital with their lights coloured stuff, would be faster than plasma?
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It's because its faster to ignite the gas using electricity in a pixel on a Plasma than to essentially open a filter shutter on the LCD's pixels.

Basically Plasma TV's are flat CRT screens and share the same advantages.
 
You know what I really hate? The way things keep progressing, I'm happy with my set but after seeing a revised model with 800hz, bluetooth glasses, better web access and other things really makes me wish I waited.
 
Red-Rice
You know what I really hate? The way things keep progressing, I'm happy with my set but after seeing a revised model with 800hz, bluetooth glasses, better web access and other things really makes me wish I waited.
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Thats the big problem with any technology, its advancing at an exponential rate so you can always sit on the fence knowing the next thing will be better. I agree its really fustrating, 6 months after getting my TV Sony announced new range with better specs ect, but at the end of the day I'm really happy with my TV, I just have to give my fiance an excuse to keep this TV for the bedroom and get me a bigger newer TV.:sly:
 

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