Biosens Bioelectron 2021 Sep 8;193:113616. Epub 2021 Sep 8.
Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, 518055, China; Berkeley Sensor & Actuator Center, University of California at Berkeley, Berkeley, CA, 94720, USA; Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA, 94720, USA. Electronic address:
One grand challenge in haptic human-machine interface devices is to electromechanically stimulate sensations on the human skin wirelessly by thin and soft patches under a low driving voltage. Here, we propose a soft haptics-feedback system using highly charged, polymeric electret films with an annulus-shape bump structure to induce mechanical sensations on the fingertip of volunteers under an applied voltage range of 5-20 V. As an application demonstration, a 3 × 3 actuators array is used for transmitting patterned haptic information, such as letters of 'T', 'H', 'U' letters and numbers of '0', '1', '2'. Read More