VibGrasp: Spatiotemporal Vibration Based Multimodal Haptic Rendering with a Lightweight Exo-Glove for 3D Shape...

Area of Science:

• Human-Computer Interaction
• Haptics
• Extended Reality (XR)

Background:

• Haptic feedback improves shape perception and task performance in XR.
• Current wearable haptic devices are often bulky and complex.
• Fingertip-based feedback limits continuous sensation during power grasps.

Purpose of the Study:

• To develop a practical and effective haptic shape rendering method for XR.
• To enhance the perception of continuous and sequential tactile sensations.
• To improve user immersion and satisfaction in virtual interactions.

Main Methods:

• Synchronized spatiotemporal vibrotactile feedback across multiple phalanges.
• Integration of 1-DOF kinesthetic feedback.
• Utilized funneling illusion and duration-modulated vibration patterns.
• Developed a lightweight exoskeleton glove with dorsal-mounted vibration actuators.

Main Results:

• Demonstrated consistent shape associations and user preferences for specific feedback patterns.
• The VR user-experience study showed higher ratings for realism, satisfaction, and harmony compared to prior methods.
• The lightweight glove design effectively transmitted feedback without obstructing motion.

Conclusions:

• The proposed haptic rendering method offers improved realism and user experience in XR.
• Findings provide insights for designing more immersive and efficient haptic feedback systems.
• This approach addresses limitations of current wearable haptic technology for shape perception.