What Is TV Refresh Rate?
The refresh rate of a display refers to how often the screen is updated with new data. The refresh rate is measured in hertz (Hz).
It refers to the number of times the screen is cleared and redrawn per second. The higher the number, the more likely you are to get a smooth-looking picture.
There are three major refresh rates – 60, 120, and 240. They have very different applications. The most practical for computer monitors is the 120hz vs. 240hz debate. Both refresh rates have two very different applications. But most computer monitors and TVs use either of these.
When it comes to TVs, the difference between these two refresh rates is enormous. It is especially visible when you watch fast moving objects on the screen. Most people don’t notice anything wrong when watching a movie on a 60 Hz TV … But watch the same scene on a 120 Hz or 240 Hz TV and you will immediately notice the difference. The image is a lot smoother. The lines between the frames are not as obvious.
With fast moving objects, you don’t get the effect of – juddering”. Objects look a lot more realistic and credible on higher refresh rate TVs. And even though the difference is very noticeable, higher refresh rates come with a higher price tag.
120Hz Vs. 240Hz Vs. 60Hz
It is really important to understand the difference between a high refresh rate and a high frame rate, as they are often confused as the same thing.
The frame rate refers to the rate at which the images are delivered by the graphics card to your display. The refresh rate refers to the rate at which the display keeps updating itself.
A high 60Hz refresh rate display means that the images on the screen will get updated on the display 60 times per second. Now, a monitor or TV with a native 120Hz refresh rate will update the image on the screen 120 times per second. Most TVs have 60Hz refresh rates.However, some TVs have refresh rates of 120Hz, while others have a native 240Hz refresh rate.
While this will mean smoother motion, it requires more powerful hardware to get the job done. The source video must be able to produce content above 60 frames per second, or else the display will just repeat the same frames over and over.
Conventional film is shot at 30 frames per second (fps). Most television is shot or played back at either 24 fps or 30 fps, respectively. You may find that many modern movies are captured and played back at 60 fps.
When motion occurs, the illusion of smooth flow is created as each individual frame is shown for an interval of one-thirtieth, one-sixtieth, or one-twentieth, of a second. When the frames are shown faster than one-thirtieth, one-sixtieth, or one-twentieth, of a second, you perceive a smoother flow, because your eye is being exposed to many more detailed pictures as they move across the retina. This is the same principle used when fast-forwarding through a video at 2x or 3x speed.
What makes the human eye superior to any movie camera or TV camera is the ability of our eye to see things at 25 frames per second.
When we move our eyes, we receive the next set of frames with the next image transmitted to the brain, giving us an opportunity to interpret these images.
The camera records one image per scene, so if the picture is not sharp enough, it gets what is called motion blur.
From a technical standpoint,.
Motion blur: It’s when the image, after being processed by the camera or the TV, starts to look blurred to our eyes when in actuality, the image is sharp.
So the movie camera is recording everything in motion blur while the human eye records everything at the rate of 25 frames per second.
So in order to create a movie that is as close to reality as possible, we refer to things in the movie as if they recorded in 25 frames per second.
And this is where things start to get complicated.
The TV screen on the other hand, like any other electronic medium, can’t handle the data that is constantly being fed to it.
Avoiding Fake Refresh Rates
What is the Refresh Rate and how does that affect my TV viewing experience?
In short, the Refresh Rate is the rate at which a display draws the picture as seen by the human eye. Your TV must be able to handle certain amount of pixels per second, which makes up the complete picture that makes up your TV display.
If your TV would not have the correct refresh rate, it would appear as if the picture is sliding around, blurring, or even some times completely disappearing. That means the TV has significantly slowed down or stopped displaying a picture altogether. This is not something you want to experience.
In this article, we will take you through how to avoid the fake refresh rates with TVs that are high-end as well as explain to you the difference between the different Hz (Hertz) terms used when people speak about Refresh Rates.