4K 240Hz TV using HDMI 2.0. How is this possible???

[cirdecus]

I noticed while shopping for a new 4k TV that many are 60Hz TV's while some from Samsung and LG are claiming a full 240Hz.

Since we know that HDMI 2.0 limits 4k resolutions to 60fps, how are claims about 60Hz possible from these TVs?

 

[Titillating]

Short answer: it's not possible.

Essentially, they use various methods to simulate a better refresh rate than they are capable of. This CNET article gives a little insight into it: http://www.cnet.com/news/what-is-refresh-rate/

 

[Coloradorocker]

The refresh rate on TV's are slightly deceiving, some panels can refresh at 240Hz while others may refresh at 120Hz but flash the backlight at a higher frequency to approximate a 240Hz refresh rate. In either case this does not mean that the TV's are showing the equivalent of 240fps, the actual frame rate will be determined by the source (many consoles run at 30fps and a majority of movies are 24fps). So on a 240Hz tv, the tv is displaying the same frame 4 times (for a 60fps input) or 10 times (for a 24fps input). TV's will also try to guess what is happening between frames and display an intermediate frame, this is the "Smooth Motion" effect. The benefit of the higher refresh rate is that the display can effectively change from one frame to the next faster to reduce motion blur.

 

[-Lone-]

Pretty obvious, do you want a TV that says 60Hz on the title or the tv that says 240Hz on the title, which sounds better? Of course you will pick the 240Hz, they just want you to buy it,what you see is not always what it is

 

[cirdecus]

Thank you guys. Great article Titillating, explains it very well!