Foldable Display Stack-Up Structures with a Divided Thin Glass Layer

This publication describes improved foldable display structures with a divided thin glass layer that enables thinner foldable devices with improved visual perception and increased mechanical strength. In aspects, a foldable device includes a foldable display structure that includes a thin glass layer. The thin glass layer includes a first thin glass portion defining a first non-folding area, a center portion defining a folding area, and a second thin glass portion defining a second non-folding area. The center portion is positioned between the first thin glass portion and the second thin glass portion. The first and second thin glass portions may be formed of ultra‑thin glass (UTG), ultra-foldable glass (UFG), and the like and have an optical index. The center portion includes an optical-index-matching resin that matches the optical index of the first and second thin glass portions, which diminishes a visibility of the folding area. Because the center portion does not include thin glass, the folding radius may be made smaller, enabling thinner foldable devices. Additionally, the first and second thin glass portions may be made thicker to improve mechanical strength and, because they are separate from one another, improve visual perception through diminished waviness