What is 240Hz LCD TV Technology?

60Hz, 120Hz, 240Hz, huh? Yes, it can be very confusing.

240Hz stands for the refresh rate of a 240Hz LCD HDTV. One of the disadvantages of LCD TVs is the perception of motion blur if the video footage includes very fast moving objects. This happens a lot while viewing sports. The standard LCD TV uses 60Hz. Which means the TV refreshes 60 times per second. To reduce the amount of motion blur on LCD TVs, manufactures came out with 120Hz LCD TVs.

These new 120Hz LCD TVs use something called interpolation. Which means it creates a new frame in between the actual frames in order to “smooth out” the video. It use special processing to take its best guess as what that middle frame would look like by analyzing the frame on both sides. They call this type of interpolation MEMC (motion estimation-motion compensation).

So what’s the difference between 120Hz and 240Hz?

The new 240Hz television models that have just been announced are supposed to go even on step further. Two groups of TV makers have chosen two different ways on how to do this. Sony and Samsung s use MEMC to add 2 more interpolated frames for a total of 3 interpolated frames for very real frame. Sony calls this the 240Hz Motionflow algorithm.

The other method is called “scanning backlight” technology. After bumping the frame rate up to 120Hz with MEMC, it flashes a backlight on and off to bump up to the 240 Hz refresh rate. This method is currently from Vizio, LG, and Toshiba.

How much of a difference is 240Hz from 120Hz? Well, part of that is in the eye of the beholder. More real world test will have to be done. My opinion the more motion blur improvements, the better so keep innovating guys! One thing we know for sure is 240Hz LCD TVs are here to stay.

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