Why is there an image sticking on the POCO F7?

For your reference, here are the reasons for image sticking on the POCO F7:
1. During the long-term of using the phone, due to the display characteristics of AMOLED, slight visual changes will appear, including “image sticking” or “burn-in”, which means that even after you switch to a new interface on the screen, the screen will show a faint residual image;
2. This is a screen effect, not real damage or aging. In order to reduce the "image sticking" or "burn-in" effect of OLED, the phone has adopted several optimization settings, including screen brightness adjustment, AOD (Always-on display), AI power saving, etc.;
3. You can also further reduce the effect of "image sticking" or "burn-in" by reducing lock-screen time, occasionally adjusting the home screen layout, and automatically switching wallpaper.