Shape Memory Alloy Actuation for Foldable Device Hinge

The patent replaces the purely mechanical folding system with an electro-active polymer-based system. The electro-active polymer members can change their physical state (contract or expand) when electrical signals are applied, substituting manual mechanical force with an electromechanical system that automatically assists or enables folding and unfolding operations.

The patent utilizes changes in physical parameters of the electro-active polymer members. When electrical signals are applied, the polymers undergo parameter changes in terms of their physical dimensions (contraction or expansion), which directly translates to force generation for folding operations. This allows the device to transition between states by changing the physical parameters of the polymer members through electrical actuation.

The patent implements self-service functionality through electro-active polymer members that can autonomously change shape in response to electrical signals. The system can automatically detect the need for folding or unfolding (through sensors detecting user intent or device state) and execute the folding operation without requiring direct manual manipulation, making the device serve itself in the folding/unfolding process.

The patent introduces electro-active polymer members as intermediary elements between the control system and the mechanical structure. These polymers act as mediators that convert electrical signals into mechanical motion, enabling automatic folding operations while isolating the complexity of the actuation mechanism from both the user interface and the structural components.