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The truth about 4K TV and 8K TV refresh rates from 60hz to 120Hz

Television makers don’t do a very good job of explaining the refresh rate, which is one of the more confusing aspects of TV technology. It is often obscured by them in actuality. An image on your TV changes how often every second with the refresh rate. TVs have a set number of 60, but you’ll hardly ever find one that says that. The soap opera effect and black frame insertion, used by manufacturers to boost their numbers, are other methods. It can sometimes be true, but it can also be untrue.
Even though there are many 4K TVs listed as having 120Hz native panel refresh rates, none of them can exceed that. We will clarify, however, that the claim doesn’t necessarily need to be true just because the number exceeds 120Hz.
Here’s the basics:
refers to how frequently a television’s picture is updated (in hertz or Hz). Films are almost always shot at a frame rate of 24 frames per second (Hz). Watch live TV shows at 30 or 60 frames per second. TVs typically refresh at 120 or 60 Hz, while midrange and high-end models frequently refresh at 60 Hz. LCD TVs with 1080p refresh at 240Hz are some of the older models. By increasing the refresh rate, you will be able to reduce the motion blur inherent in all current TVs. The motion blur on your screen is caused by the filtering effect created when an object, or the whole screen, is moving. In addition, some video cards can handle 120 frames per second signals from PlayStation 5, Xbox Series X and other gaming consoles.
What TV makers say
I’ll start by describing terms you will see on the marketing materials and websites of TV makers. Many of the TV reviews don’t mention the concept of “Hz” or “refresh rate,” and instead refer to the TV’s motion handling capability by another moniker.
LG: TruMotion
It is listed on LG’s website where it lists the native refresh rate of the panel. In 60Hz TVs, it appears “TruMotion 120 (60Hz Native)” while on 120Hz TVs it’s “120Hz Native”.
Samsung: Motion Rate
Even though Samsung is not as transparent as LG about this as it used to be, this has improved over time. Its website lists the “Motion Rate” for its 4K and 8K TVs. The Motion Rate is generally twice what the native refresh rate is. A Motion Rate of 240 is equivalent to a native refresh rate of 120Hz, whereas a Motion Rate of 120 is equivalent to a 60Hz refresh rate. Their lowest-priced TVs have a Motion Rate of 60, which indicates a 60Hz refresh rate.
Sony: MotionFlow XR
The Sony website doesn’t include any specific model numbers for most 2021 TVs, instead it simply says “Motionflow XR.” On a few, however, it does. This product may also be shipped as a “Motionflow XR 240 (native 60 Hz)” or “Motionflow XR 960 (native 120 Hz).
Vizio: Refresh Rate
website – just twice what was claimed on its website. The CRT’s 2021 TVs, however, do not use the term and most do not list any refresh rate specifications based on what we could find. Whether 60Hz or 120Hz, all Vizio TVs of the 2021 range run at 60Hz except for the P-Series and the H1 OLED, which run at 120Hz.
TCL: Clear Motion Index or Natural Motion
I couldn’t get a hold of a TCL set. There are some that state “60Hz native,” which is really 60Hz native. And some say “120Hz CMI,” which stands for Clear Motion Index, which is also 60Hz native. Moreover, Natural Motion 240 is also 60Hz, so they both operate at the same frequency. There are only a few TCL TVs that advertise Natural Motion 480 as being 120Hz.
It is essential that your TV has native 120Hz refresh rate in order to increase motion resolution and support the best video output modes on next-generation game consoles. Although a 60Hz TV does have a limited amount of motion resolution improvement, it is still possible to improve it if the TV has some other feature, such as backlight scanning or black frame insertion. We should start from the beginning so we don’t get lost in jargon.
Back up a second: What’s refresh rate?
On a TV, the refresh rate represents the amount of time between each change of the image (also known as a “frame”). Modern TVs are able to refresh at 120Hz (120 frames per second), which is twice as fast. Traditional TVs would refresh 60 times each second. The same concept applies to 4K HDTVs as it does to 1080p HDTVs. TVs in some parts of the world bring image refresh rates as high as 100Hz, with some models doing it at 50Hz. You just need to know what electricity is available where you live. It is not necessary to distinguish between 50 and 60 in this article, but be aware that 100 and 120 function similarly. To make this easier for you, I am going to use 60 and 120, but feel free to read that as 50 and 100 if you happen to be in the UK, Australia or any other country where the electricity is 50Hz. This is not entirely true. By increasing the refresh rates of LCDs and OLED TVs (the only two technologies for TVs available today), motion blur can be reduced. A motion blur is a blur that appears to move. Thank you for your inquiry…
Your brain on blur
Motion blur is the phenomenon that arises from anything that is moving, such as an object on screen or the entire image (such as when the camera pans), and looks softer than if it were still. All LCDs and current OLEDs exhibit motion blur. Images in motion are softer than those that are stationary due to motion blur. Intriguingly, your brain is responsible for much of the blur that forms. It is basically your brain anticipating where the object (or overall image) will be in the next fraction of a second based on the motion it notices. LCD and OLED TVs fail to convey motion due to holding that still image for the full 60th of a second, so your brain confuses the still images for motion, mistaking them for moving ones. I can’t get into the details here, except to say that it’s quite fascinating. If you want more information, I strongly recommend reading the article by BlurBuster. While you might think you’re producing the motion blur, in fact it’s caused by how televisions work. There is another kind of blurring that comes from camera motion. Occasionally, motion blur is not bothersome to some people. It is even invisible to some people. Many people notice this and are bothered by it, including me.
Antiblurring technologies beyond refresh rate
Rather than solving the entire problem, the refresh rate plays a small part. It doesn’t make much of a difference to reduce motion blur by just doubling the frames. There is something else that must be done. It can be accomplished in two ways. In the first, a TV creates a new frame by combining the one that came before with one that comes after, creating something like a hybrid frame. It can deceive your brain for long enough to prevent the blurring of the picture. Although interpolation can produce the soap opera effect, which makes movies seem like ultra-smooth reality television shows, the amount of interpolation can be high or low according to the quality of the interpolation. Many viewers are fond of the effect, but film buffs and those who are concerned about image quality despise it. Depending on the level of processing used, there would be varying effects on the image, but a little might reduce motion blur in some cases and cause no harm. Alternatively, it can be dialed up so there is even less motion blur, but the moving image is excessively realistic in appearance, which could be distracting to some viewers. TVs feature different levels of processing when it comes to applying this to the image; some have just one. The following sections contain more information about these settings. A scanning backlight can also be used as an alternative to Black Frame Insertion (BFI). A TV goes black when it loses part or all of its backlight. As a result, the image is not anchored in the brain, so it’s not blurred. A poorly executed video will, however, cause the image to flicker in the eyes of many viewers. During that time, the light output of the television also drops, as it is not putting out any light. Manufacturers use both techniques to determine how effective their “refresh rate” is. In the case of a 60Hz refresh TV with scanning backlight, their effective refresh rate might be 60Hz. For example, a TV with more in-depth BFI mode and frame interpolation might have a claim of an effective refresh rate of “540.” The way companies calculate their “effective rate” numbers is not transparent, but at least they are more consistent now than they were several years ago. There is also the possibility these features may become annoying with use over time. Some people are especially sensitive to flickering backlights, so you might have to disable these features. When looking for a TV, it is best to look for one that has a 120Hz refresh rate if you’re concerned about that.
Bottom line (should you care?)
In this case, two factors are involved. First, we say it again: We must not allow ourselves to be destroyed by a world in turmoil. Marketing is not to be trusted. Take it with a grain of salt at least. There’s a difference between marketing and information. Marketing is about selling, not teaching about it. Motion blur can also be reduced. The first 120Hz 1080p TVs to hit the market were notable for greater motion clarity. In the past couple of years, technology has only improved. Nonetheless, if you are sensitive to motion blur, or want the best experience from your Xbox Series X or PlayStation 5, you should look for a TV that runs at 120 Hz. This extra 4K resolution would be wasted on blur if it were not for the extra resolution. Similarly, it’s important to read reviews for measurements and personal opinions about how motion is handled on the TV. This information is more helpful than specs provided by the manufacturer.