Foldable Display Support Structure for Bend-Stress Relief

The patent applies parameter changes by establishing empirical formulas that define specific relationships between supporting structure parameters (spacing between first and second supporting parts, deflection angles) and screen parameters (bendable area dimensions, non-bendable area positions). By changing from arbitrary parameter selection to formula-based parameter determination, the design achieves optimized stress distribution that prevents adhesive layer peeling and inorganic film layer fracture, thereby improving reliability without requiring overly complex structural designs.

The patent applies spheroidality by introducing arc-shaped transition areas in the supporting parts. Instead of sharp corners or flat transitions, the supporting structure incorporates curved surfaces that gradually distribute stress. This curvature design specifically addresses stress concentration at the interface between supporting parts and the screen, preventing damage to the adhesive layer and inorganic film layer while maintaining manufacturing feasibility through standard arc-shaped geometric features.

The patent applies local quality by differentiating the supporting structure into distinct regions with different functional characteristics. The first supporting part is positioned to correspond to the non-bendable area for maximum support, while the second supporting part is positioned on the bendable area side with specific spacing and angular orientation. This localized quality differentiation allows the structure to provide strong support where needed while minimizing stress concentration in the bendable area through optimized positioning and spacing parameters.