How to solve the problem of mobile phone flicker

When you take pictures with your mobile phone, many light sources will flicker, such as metal halide lamps, fluorescent lamps, and LEDs. This is because many light sources are indeed flickering, but the frequency is high and cannot be seen by the naked eye, but the camera does capture it. Today's LEDs can be flicker-free, but the driver cost will be higher. When buying an LED, you should not only check whether there is flicker, but also the power factor. High power factor and no flicker are the best. If you abandon the power factor and make flicker-free LED lights, the cost will be cheaper than those with flicker and high power factor.

OLED (AMOLED) screen has the advantages of high color gamut and self-illumination. It not only has better color performance, but also has the advantages of pure black display, almost no power consumption, and can be adapted to screen fingerprint recognition technology. However, OLED screens still have some defects, such as screen burn-in and flickering at low brightness. The former can be alleviated by frequently changing theme wallpapers, but how to deal with the latter?

OLED Most mobile phones with screens use low-frequency PWM dimming at low brightness. At low brightness, the duration of each flash is relatively short. Frequent flashes can easily cause visual fatigue, causing dry and itchy eyes. At this time, we can use the "Flicker Protection" APP to alleviate the stroboscopic problem of the OLED screen at low brightness.

When we run the APP for the first time, we will be prompted to enable the permission of the accessibility service. Then we can modify the pixel filtering level and basic physical brightness through the pop-up window. Click the "Start Service" button in the upper right corner of the window to take effect. .

The principle of this APP is not to affect the actual value of the system brightness (it is still very high, and the screen does not flicker at this time). It reduces the screen brightness by turning off some pixels and adding a transparent black mask layer. Thereby playing the role of eye protection.

In short, the visual effect after starting the APP service is that the screen becomes dark (this darkness does not cause flicker problems), so it is most suitable for manual activation at night or in poor lighting conditions, instead of The way the screen automatically reduces brightness (there is flickering).