A screen of the Apple phone is divided between the inside screen and the outside screen, usually the inside screen refers to the main body of the screen used to display content, and the outside screen is our usual, touch screen glass, it is more convenient to distinguish.
The outer screen is a film screen, usually a glass material, mainly used to touch and protect the inner screen.
The inner screen is the most important part of the screen, which is used to display content, and all colors and pictures are actually presented through the inner screen.
In fact, when we distinguish between internal and external screens, it is mainly when the screen fails, especially when the screen is broken or damaged.
In this case, if the external screen is broken, then it is obvious that the screen glass is broken, and the following content will not affect it.
And if the inner screen is broken, then there will be flower screen, black screen, light and shadow ripples and so on.