A 10×10 TFT-based Flexible Tactile Sensor Array for Haptics

Abstract

Flexible tactile sensors such as haptic gloves can be found in many applications for future robotics and human-machine interfaces such as augmented reality (AR) and virtual reality (VR). Generally, multiple functinalities and low power consumption are important performance parameters to be considered [1]. Currently, most haptic feedback devices utilize piezoresistive materials to detect force signals [2], [3], which in nature have drawbacks in spatial resolution and sensitivity. Piezoelectric sensors are also optional, however, traditional piezoelectric sensors cannot detect static force signals, both of which face challenges in forming a pixelated array which can visualize the haptic gestures. In this work, a flexible tactile sensor formed by a 10×10 pixelated piezoelectric sensor array and its sensor interface circuit is proposed to achieve the haptic visualization of dynamic and static force stimuli.