A PVDF-based Flexible Keyboard Device Exploiting the Piezoelectric Effect

Interconnected devices, characterized by intelligence, portability, and adaptability, have garnered substantial attention and are progressively being integrated into internet of things (IoT) technology to foster innovation and improve human-machine interaction interfaces. This study presents a polymer-based flexible keyboard that utilizes the piezoelectric effect of poly(vinylidene fluoride) (PVDF). The device is equipped with an array of flexible electrodes, with a thickness of merely 0.13 mm, enabling the press units to respond within 50 ms. Notably, it demonstrates exceptional flexibility and adhesiveness, allowing it to be attached to any desired surface without signal crosstalk. Moreover, the sensitivity and sensing performance of this keyboard device can be further enhanced through encapsulation techniques, rendering it highly suitable for low-frequency trigger scenarios such as device interaction.