240/120/60 hertz and Respond Times
There is a lot of confusion out there with these two terms. Again these articles are to give a better understanding only; I will do my best to keep it as simple as possible.
Let’s tackle response times. Every manufacturer will stress their ability to have the shortest respond times. This is (in my opinion) NOT important provided the timing is lower than 15 m/s (milliseconds).
First off, the response time is the time spent for a pixel on a television to go from “white to black and back to white.” The standard out there today is around 4-5 milliseconds. Keep in mind, our eyes can only respond to about 12 to 16 milliseconds; assuming you have perfect 20/20 vision. So this is why I believe that refresh rates are not as important as many other features available on a TV.
The lagging that you would see during any sporting evens or movies are mainly due to poor signal quality and refresh rates. Remember 15 years ago when you bought a 60 hertz bulb and once screwed in, you would notice a tiny flicker? Similar idea here;
60 hertz is what all traditional TVs have. 120 hz is the new standard that’s now available. There is also 240 hz which is a debatable improvement on the 120.
There are pros and cons to this concept. But first a history lesson: When filming a movie, the camera would only record at 24 frames per second. But from the previous article, you should now know that a television refreshes 30 or 60 times per second. So 24 doesn’t really equate well with 30 or 60 refreshes per second. This is why you see a bit of flickering or jitteryness (if that’s a word) in your movies. You would most likely notice this when the camera pans across a scenery or when a camera is following a speeding vehicle and there is a bit of lag in the background.
So the reason for introducing 120 hertz was to reduce this flickering/jitteryness. How you ask? 120/24=5 which is a nice whole number, where 30/24 doesn’t equal a whole number.
So the resulting picture is definitely smoother. I’ve heard both likes and dislikes of this technology. I personally do like it. When it first came out, I wasn’t exactly onboard. Here is what you should do, go in to a retail store where they have a demo of 120 to 60 Hz set up. Stand there for a few minutes and really analyze the pictures. See if you can notice the differences and more importantly if it bothers you. But you can rest at night as this feature can be turned off on almost any of the TVs that have it!