There is often a misconception surrounding Screen Refresh rate and Adaptive Sync.

Today we will be taking a keen look at what a screen refresh rate means and Adaptive Sync.

Get your snacks and drinks ready, this is going to be an entertaining ride.

 

Screen Refresh Rate.

Screen refresh rate in different levels
Image source 1

To put it simple and straight. Screen Refresh Rate is measured by the number of times your screen reloads to produce an image in a second.

Screen Refresh Rate is measured in hertz (Hz) per second.
There are few components involved in screen refresh rate production.
To archive the required Refresh Rate, these components have to work together.

 

Components required for a proper Screen Refresh Rate are:

CPU
GPU
Screen.

Some smartphones come with CPUs that supports 120hz refresh rate, but due to the limitations of the screen used, the refresh rate might be rendered lower.

Screen Refresh Rate user defined
Image source 1

Ideally, the higher the screen refresh rate of a device, the better the image rendered will appear.

Take for instance during gaming. When a game is being played on a device with support to produce an image 120hz[120times] per second, the game is smooth and actions are easily controlled for a better gaming experience.

What this means is, the images are not frozen in a particular frame due to slower refresh rate which often appears as lags or frame skips.

During the just concluded Apple event, Apple CEO Tim Cook made a revelation about the iPhone 13 series.

According to Tim Cook, the IPhone 13 Pro series will be coming with a much better 120hz Refresh Rate, Apple is calling the higher screen refresh rate Promotion.

What this means is, Apple is finally bringing a smoother display to it’s iPhone series.

It’s worth mentioning that, the higher 120hz screen refresh rate has been present in the highend Ipad Pro for quite some time now.

A higher refresh rate can have its toll on your devices battery life tremendously.
For an example, if a device with 60hz loses 10% of battery after 1hour of PUBG gaming, a device with a higher 120hz refresh rate will lose upto 30% in an hour playing the same PUBG.

One major way manufacturers are trying to scale this down, is through screen refresh rate adaptive sync.

 

Redmi 10 vs Redmi Note 9 [Specs comparison and price].

 

Scren Refresh Rate Adaptive Sync Tech:

Originally, Adaptive Sync was designed to combat screen tier and misreading of images sent out from the GPU to the screen of a device.

Screen Refresh Rate adaptive sync
Image source: 1

Take the above image for an example. The game being played delivers images at 120hz from the GPU, but because the monitor is capped at 60hz, images are rendered late, causing poor gaming experience.

To fix this error, adaptive sync was developed by vesa in 2014, to fix screen tear, lags and misrendering of visuals on computer screens.

What adaptive sync does is this. When adaptive sync is active, images are rendered according to the refresh rate the screen can handle.
Also, adaptive sync can help to render images according to the needed refresh rate. Like a still image can be rendered in 30hz Screen refresh rate, and videos 24hz.

When necessary, during gaming, adaptive sync can push the Screen refresh rate to 120hz.

Several Android devices from Xiaomi and Samsung have adopted this adaptive sync for their highend flagship devices to help reduce usage toll on smartphone batteries.

The recently unveiled IPhone 13 series is coming with this tech.

 

Non-Adaptive Sync:

For devices without adaptive sync technology, you can expect a maximum refresh rate at all times whether its needed or not.

What this means is, a poorer battery performance. The GPU and screen of a device with non-adaptive sync but a higher refresh rate of 120hz or more will be working over time to produce a maximum refresh rate at all times, whether necessary or not.

Other than poor battery management, you might experience heating issues doing mild tasks like reading a blog or watching a movie, as the said device will be pushing the displaying content at an unnecessary high refresh rate level.

 

For more tech updates do follow the team on twitter, you can also check out the general discussion channel on discord.

Until the next one, do have wonderful day.

By zesushv

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