Its design purpose is to prevent the mobile phone screen from displaying the same picture for a long time because of unattended operation, which leads to the aging of the screen display and shortens the display life of the mobile phone screen. At present, the wallpaper picture of mobile phone lock screen is generally called "mobile phone screen saver".
Extended reading: the steps to set the wallpaper picture of mobile phone lock screen.
1. Take MIUI system as an example, open the setting application interface of MIUI system, and click the "wallpaper" setting item;
2. Next, in the opened page, select your favorite picture, and in the picture setting page, click the "Use Wallpaper" button;
3. Finally, in the dialog box that pops up at the bottom of the screen, click and select the "Apply Lock Screen" button.