Apple patent filing involves a foldable iPhone with a self-healing display — Apple World Today

Still, the display cover layer for the iPhone may be scratched or dented in daily use. Part of Apple’s idea to help mitigate the number of dents, scratches, or other imperfections in a display cover layer is to include a layer of self-healing material. 

There are some options here. The layer of self-healing material may be formed across the entire display cover layer or may be formed only in the flexible region of the display cover layer.

Apple says the self-healing may occur in the layer of self-healing material without prompting (e.g., when the self-healing coating is dented, the material of the coating may fill the dent even without external intervention). Alternatively, a user could initiate self-healing by externally applied heat, light, electric current, or other type of external stimulus.

Apple says that when heat is used as a stimulus for the self-healing process, the display cover layer may include transparent conductors that form a heating layer in the display cover layer. The heating layer may be used to generate heat to stimulate self-healing. The heating layer may be used to generate heat in response to user input, according to a predetermined schedule, or when the iPhone is charging.