US Patent 11758752 Foldable display apparatus

A foldable display apparatus comprises a display panel including a folding area and a non-folding area at one or more sides of the folding area; and a cover window on the display panel. The cover window includes a glass substrate including a plurality of patterns at the folding area, and a protective layer between the glass substrate and the display panel. Each of the plurality of patterns includes a plurality of protrusions.