Do not confuse 120 Hz in the screens of the iPhone Xs and iPad Pro 10.5. These are different things

During yesterday’s presentation, Apple introduced the flagship iPhone Xs and Xs Max. Among the listed characteristics, 120 Hz touch-sensing was indicated.

Many media outlets have filed this as a revolutionary feature of the iPad Pro 10.5. “

Like, this is the same ProMotion, responsible for the smoothness of image transmission. And supposedly this is the refresh rate of the screen.

This is fundamentally wrong !

What is 120 Hz in the iPad Pro 10.5 “?

The ProMotion technology used in the iPad Pro 10.5 is the ability to overclock the screen refresh rate to 120 Hz.

In other words, this is a characteristic that indicates the number of possible changes in the image per second. The frequency with which the frames are changed on the display.

Even easier. The picture displayed on the screen is redrawn 120 times per second. The higher this value, the smoother the image becomes.

What then is wrong with the screens of the iPhone Xs and Xs Max?


In the new Apple smartphones, these 120 Hz are not responsible for the refresh rate of the screen. This is the reading frequency of the touch sensor.

At 60 Hz, the screen monitors the motion every 16.6 milliseconds, and with the 120 Hz display this time is halved – to 8.3 milliseconds.

When this is the same as the refresh rate, the update intervals end at the same time. Animation begins at one point in time.

With a reading frequency of 120 Hz, the delay between touching and handling this touch by the smartphone is halved. Due to this, gestures are read faster.

In other words, the sensor will start to read your touches and movements on the screen faster. But the image itself will not move smoothly.

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