US Patent 9204565 Foldable display apparatus

Embodiments relate to a hinge assembly in a foldable display device that provides support for a bending portion of a flexible display panel when the foldable display device in an unfolded state. The hinge assembly includes a bending portion support assembly and a sliding member that is slidable relative to the bending portion support assembly as the foldable display device is folded or unfolded. The hinge assembly also includes a surface that abuts the bending portion of the flexible display panel that defines the curvature of the flexible display panel when the foldable display device is rotated from the unfolded state.