Apple Explains What's Inside the iPhone Duo's Folding Screen

The iPhone Duo's inner display uses a complicated, multi-layer structure that Apple says will hold up to wear and tear.

There are 10 ultrathin layers in total, including a nano-textured cover layer made from a custom polymer that Apple says is up to 40 percent stiffer than "other materials used in the industry," which presumably means other foldable devices.

Apple added high-strength glass above and below the folding display panel, along with a titanium plate at the bottom of the stack. Custom adhesives "allow the layers to glide past one another like the pages of a book, relieving bend stress," according to Apple.

The exterior nano-texture layer's finish is meant to reduce glare and minimize the visibility of the crease, and a scratch-resistant coating covers the nano-texture layer.

The outer display is protected by Ceramic Shield 2 like the iPhone 18 Pro models, while the back of the iPhone has Ceramic Shield. The inner display gets the custom polymer cover instead of Ceramic Shield.

Both of the ‌iPhone Duo‌'s displays support ProMotion, Always-On, and True Tone, and offer 3,000 nits of peak outdoor brightness.