Rollable Display Curvature Control for Crack-Free Panel Bending

The patent introduces a curved surface member with a specific curvature radius that matches or exceeds the threshold curvature radius of the display panel. This curved surface provides a gentle bending path during rolling, preventing excessive stress concentration that would occur with sharp bends, thereby maintaining panel reliability while enabling compact storage.

The curved surface member is positioned in advance to guide the display panel during the rolling process. By pre-establishing the correct curvature path before the panel is fully rolled, the system prevents sudden stress spikes and cracking that would occur without this preparatory guidance structure.

The curved surface member maintains a consistent curvature radius that prevents the display panel from bending below its threshold curvature radius during repeated rolling cycles. This consistent geometric constraint ensures that the panel always follows a safe deformation path, preventing cumulative damage while maintaining portability.

The patent specifies that the curved surface member's curvature radius must be equal to or larger than the threshold curvature radius of the display panel. This parameter control ensures that the panel's deformation remains within safe limits during repeated use, preserving structural integrity while enabling portable operation.

The curved surface member acts as an intermediary between the display panel and the rolling mechanism. It provides the necessary contact for deformation restoration while its specific surface properties minimize friction-induced static electricity generation, thus mediating between mechanical support and electrical hazard reduction.

The patent addresses static electricity by creating an electrically safe environment through proper grounding of the curved surface member and use of low-friction materials. This effectively neutralizes the harmful electrostatic conditions that would otherwise accumulate during rolling contact.