Domestic mobile phones lead the dimming frequency, Samsung Galaxy S24 series mobile phone PWM frequency modulation is upgraded to 492Hz

According to news on January 24, the Galaxy S24 mobile phone series launched by Samsung this year should be more eye-friendly. The reason is that they have finally upgraded the PWM (pulse width modulation) dimming refresh rate of the AMOLED display, surpassing the 480Hz of the iPhone and reaching 492Hz, which can reduce screen flickering and relieve eye fatigue.

Simply put, PWM is a technology used to control screen brightness. While traditional LCD screens adjust brightness by changing the intensity of the backlight, OLED screens do this by rapidly switching pixels on and off, often referred to as "flickering." It is understood that in 2017, the iPhone X used an OLED screen for the first time, and some users found that they felt uncomfortable or even had headaches when using the phone. One of the reasons is that the PWM frequency of iPhone X was only 240Hz at that time, and the flicker was very obvious, which could easily cause eye fatigue. In order to solve this problem, Apple has increased the PWM frequency to 480Hz starting from iPhone 13, which is considered an improvement. The PWM frequency of Samsung’s entire Galaxy S24 series (Galaxy S24, Galaxy S24 Plus and Galaxy S24 Ultra) has been increased to 492Hz, which means the flash frequency is faster and the irritation to the eyes is lower. According to Android Central, not only that, Samsung has also optimized the dimming mode under high brightness and adopted a gentler sine wave dimming mode, which is more eye-friendly. It is worth mentioning that in recent years, Chinese manufacturers have taken the lead in raising the PWM frequency of mobile phone screens to a higher level. Some models of Honor have even reached 3840Hz, and OnePlus 12 has also reached 2160Hz. . Not only that, manufacturers such as OnePlus and Motorola also provide DC dimming solutions similar to LCD screens, which not only provide the advantages of OLED display, but also minimize flicker problems. In the future, Samsung can further improve the user experience through software updates, such as adding a DC dimming-like mode under high brightness and further increasing the PWM frequency under low brightness. Research shows that PWM frequencies below 1000Hz may still cause eye fatigue at low brightness, which is particularly important as OLED screen brightness continues to increase.

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