Samsung brings major screen improvements with the Galaxy S24 series. All three models in the line have brighter and more power-efficient screens. They have a maximum brightness of 2,600 nits and can be lowered to a scan frequency as low as 1Hz thanks to being equipped with LTPO panels. In addition, there is an important screen upgrade on the Galaxy S24 that Samsung did not talk about.

Specifically, according to Android Central, the screen of the Galaxy S24 series has a PWM (Pulse Width Modulation) refresh rate of 492Hz. This number is more than double that of the Galaxy S23 series, which only has 240Hz. While not as high as the 1920Hz or 2160Hz of some Chinese smartphone models, it is higher than the 480Hz of the iPhone 15 Pro and the 246Hz of the Pixel 8.

If you've never heard of PWM, this is a technology that relies on changing the width of electrical pulses to increase or decrease screen brightness. When Apple launched the iPhone X with an OLED screen in 2017, some users found the phone made them feel tired or have headaches. This is because the PWM of the OLED screen on iPhone X has a low frequency, only 240Hz.

Apple finally improved this electrical pulse speed to 480Hz since the iPhone 13. With the newly launched Galaxy S24, Samsung has surpassed Apple by equipping all three models in the screen line with higher frequencies. I've been using the Galaxy S24 Ultra for the past few days and it feels much better than the Galaxy S23 Ultra.

In the future, Samsung could improve things by adding a feature that reduces screen brightness like DC Dimming technology, or increases the pulse rate at low brightness levels.