Does my TV really have 120 Hz refresh rate ??

[Morad Tamer]

Welcome everyone
I have an LG TV with model number "43LF6300-TA" i got this number from the TV it self by pressing mute 3 times consecutively put it through google but never find that exact same model
What I found was "43LF6300" without that "-TA" at the end that model which I fond says it have 120 Hertz refresh rate
because I wasn't sure from that spec I open this website ""http://testufo.com/#test=framerates""
but got only 60FPS

Can you please help me diagnose this

 

[esco_sid]

Most TVs will be 60HZ even if they say 120HZ they just use trickery to achieve it and its not real 120hz.

 

[Morad Tamer]

Most TVs will be 60HZ even if they say 120HZ they just use trickery to achieve it and its not real 120hz.

OK but I would trust LG as in their Specs page about my TV it says that the refresh rate is "TruMotion120Hertz" and If I understood that article from Cnet correctly then I have true 120 Hertz refresh rate
I have also seen another thread of someone who had a similar problem and it turned out that his Graphics Card doesn't support 120 hertz refresh rate
however mine is a GTX 950 and I says it have HDMI 2.0 which according to my research support 1080*1920@120FPS
So What is the problem of the chain hat connects my TV to my PC?

 

[Solandri]

1) 120 Hz TVs really just use 120 Hz panels. The TV inputs themselves only receive 60 Hz input (at least on all the TVs I've seen). The reason for the 120 Hz panel is for displaying movies. Movies are shot at 24 fps. When you try to display that on a 60 Hz panel, it doesn't divide evenly. Movie frame #1 is shown for 3 TV frames, movie frame #2 is shown for 2 TV frames, movie frame #3 is shown for 3 TV frames, movie frame #4 is shown for 2 TV frames, repeat. This uneven distribution is called judder, and results in an annoying vibration-like motion in what's supposed to be smooth motion or smooth panning.

One fix is to use frame interpolation. The TV looks at the 24 fps input stream, and interpolates 60 fps. This causes the dreaded "soap opera effect" where the movie looks like a live TV show instead of a movie. Some people like it, many don't.

The other fix is to use a 120 Hz panel. To show 24 fps on a 120 Hz panel, you simply show each movie frame for 5 TV frames. No judder, and smooth motion and panning remains smooth. 240 Hz TVs are the same thing, except for 3D movies shot at 24 fps (separate left and right images effectively make them 48 fps). Unfortunately every 120 Hz TV I've seen doesn't give you direct access to the 120 Hz panel. The 120 Hz refresh rate is only supported internally, and is only used with a 24 Hz input signal (24 fps movies).

2) HDMI doesn't support refresh rates higher than 60 Hz. So if you do run across a TV which lets you drive it at 120 Hz, it would only be over Displayport or DVI-dual link.