A Texture Display Device Based on Multi-coil Superposition Driving Method

It is a challenge to develop high spatial resolution texture display devices using electromagnetic-driven methods, as the magnetic driving force sharply decreases due to the small size of the actuators. To address this challenge, we report a high spatial resolution texture display device using a novel multi-coil superposition driving method, which consists of 25 tactile units arranged in a 5*5 matrix with a spatial resolution of 2.75mm. Using the vector superposition of magnetic fields, the driving force of the target tactile unit can be effectively enhanced through the joint driving of multiple electromagnetic coils. The experimental result indicates that the upward holding force of the target tactile unit using the proposed multi-coil superposition driving method increases by 36.2% compared to the traditional single-coil driving method.