REFRESHABLE TACTILE DISPLAY USING BISTABLE ELECTROACTIVE POLYMER AND DEFORMABLE SERPENTINE ELECTRODE

摘要

A refreshable tactile display using a bistable electroactive polymer with a stretchable serpentine Joule heating electrode. A portable refreshable tactile display with Braille standard resolution has been demonstrated. The steep modulus change of BSEP over a narrow temperature range achieves a device with high blocking force of over 50g and large displacement of 0.7mm. A "P3R" fabrication process of Prestretch-Pattern-Protect-Release is effective to form a S-CNT electrode in the wrinkled surface layer with high compliancy and resistance-consistence up to 188% area strain. The electrode can soften the BSEP film at 30 V in less than 1 s. The simple architecture of the tactile display ensures an easy and low-cost fabrication. The demonstrated refreshable tactile display should find a wide range of applications in recreation, entertainment, robotics, health care, and so on.