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120Hz refresh rate vs 120Hz touch-sampling.

120Hz refresh rate

Many people are confused in the 120Hz refresh rate and touch sampling rate . The iPhone have the 120-hertz touch sample rate, but in reality, they are running at the 60Hz refresh rate. Hertz, refers to the intervals at which the screen registers an input. At 60Hz, the screen tracks movement every 16.6 milliseconds, but with a 120Hz display, that time is cut by half to 8.3 milliseconds.

The touch sample rate and the refresh rate are both different things,Like most of the mobiles both touch sampling rate and screen refresh rate both running at 60Hz, tracking and refresh intervals end at the same time, which means the rendering of the animation begins one interval later. However, with the use of touch sample rate being at 120Hz coupled with the refresh rate being at 60Hz on the iPhones, animations on these devices will start quicker and look smoother, This thing will look smooth but its is not comparable to 120Hz panels.

There are many phone displays that features a refresh rate of 120Hz and they cost a pretty penny so imagine the price tag these iPhones might have touched had they shipped with an actual display with a 120Hz refresh rate.

In current market you can get many phones with 60-90Hz refresh rate. Now in 2020 you will see ,many phones which will come with 120Hz rate display. The latest example is Poco X2.This phone comes in the Mid-range bracket and is equipped with 120Hz display. You can also get 120Hz display in Asus ROG phone 2.

These 120Hz panels are very distinguishable than 60-90Hz displays.

Source : https://wccftech.com/iphone-xs-120hz-touch-sample-rate-explained/

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