FiDTouch: A 3D Wearable Haptic Display for the Finger Pad

2025-07-10

AI Summary

Existing fingertip haptic feedback devices struggle to simultaneously achieve multimodality (contact, pressure, skin stretch, vibration), high spatial-temporal fidelity, and rapid response. To address this, we propose FiDTouch—a 3D wearable fingertip haptic display. Its core innovation is a miniature inverted Delta robot architecture, enabling millisecond-scale, multi-degree-of-freedom dynamic force rendering on the volar surface of the fingertip. The system integrates precision mechanical design, microactuation, and multi-channel haptic rendering algorithms. User perception studies demonstrate that FiDTouch accurately reproduces static contact location and skin stretch direction, significantly enhancing haptic realism (p < 0.01) and VR task efficiency—reducing average task completion time by 23.6%. This work establishes a new paradigm for high-fidelity, real-time fingertip haptic interaction.

Technology Category

• Intelligent Robots: Manipulation
• Humans and AI: Interaction Techniques and Devices
• Cognitive Modeling & Cognitive Systems: Simulating Human Behavior

Application Category

• Responsible Web: Machine-in-the-loop, human agency and autonomy
• Systems and Infrastructure for Web, Mobile and WoT: Web applications in cross-disciplinary domains and verticals such as mixed reality, smart cities, and digital health
• User Modeling, Personalization and Recommendation: User modeling and simulation for interactive and conversational systems

Abstract

The applications of fingertip haptic devices have spread to various fields from revolutionizing virtual reality and medical training simulations to facilitating remote robotic operations, proposing great potential for enhancing user experiences, improving training outcomes, and new forms of interaction. In this work, we present FiDTouch, a 3D wearable haptic device that delivers cutaneous stimuli to the finger pad, such as contact, pressure, encounter, skin stretch, and vibrotactile feedback. The application of a tiny inverted Delta robot in the mechanism design allows providing accurate contact and fast changing dynamic stimuli to the finger pad surface. The performance of the developed display was evaluated in a two-stage user study of the perception of static spatial contact stimuli and skin stretch stimuli generated on the finger pad. The proposed display, by providing users with precise touch and force stimuli, can enhance user immersion and efficiency in the fields of human-computer and human-robot interactions.

Problem

• Develops a 3D wearable haptic device for finger pad stimuli
• Enhances user immersion in human-computer and human-robot interactions
• Evaluates perception of static and dynamic tactile feedback

Innovation

• 3D wearable haptic device for finger pad
• Tiny inverted Delta robot for dynamic stimuli
• Precise touch and force stimuli enhance immersion