Flexible Display Folding Mechanism With Variable-Radius Bending

The patent applies the dynamics principle by transitioning from a fixed-radius bending mechanism to a variable-radius bending mechanism. The bending mechanism dynamically adjusts its rotation radius based on the bending angle, with the rotation radius decreasing as the bending angle increases. This dynamic adjustment ensures that the flexible display screen undergoes smooth deformation without dead folding or stretching, thereby maintaining display functionality while managing the increased mechanical complexity through controlled motion profiles.

The patent implements parameter changes by varying the rotation radius parameter during the folding process. Instead of maintaining a constant rotation radius, the system changes the rotation radius parameter as a function of the bending angle. This parameter change allows the bending mechanism to adapt to different stages of folding, preventing stress concentration and deformation issues that would otherwise cause display failure.

The mechanism dynamically adjusts the rotation radius during the folding process, creating a variable-radius bending path. This dynamic adjustment redistributes the stress along the folding region by preventing both excessive stress concentration (which causes dead folding) and insufficient stress (which causes stretching). The rotation radius is specifically designed to decrease as the bending angle increases, optimizing stress distribution throughout the folding sequence.

The patent employs curved geometry principles by implementing a variable rotation radius that creates a non-circular bending path. Instead of folding along a fixed circular arc, the display screen follows a variable curvature path where the radius of curvature changes with the bending angle. This variable curvature approach better matches the natural deformation characteristics of flexible materials, reducing stress concentration and preventing dead folding.

The bending mechanism is designed with dynamic characteristics, where the rotation radius is not fixed but varies continuously during the folding process. This dynamic behavior is achieved through a mechanism that couples the rotation radius with the bending angle, ensuring that the radius decreases as the angle increases. This dynamic adjustment maintains display functionality by preventing dead folding and stretching while managing the inherent complexity through systematic design.

The mechanism incorporates preliminary action by pre-planning the variable radius profile based on the expected bending angle. The rotation radius is predetermined as a function of the bending angle, allowing the system to follow an optimized folding path from the outset. This preliminary configuration of the variable radius profile ensures that stress is properly distributed throughout the folding process, preventing display failure before it occurs.