Illusory Tactile Feedback Using Two-Point Moving Skin Stimulation
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Solution Overview
Problem
Existing haptic/tactile feedback devices fail to provide realistic and complex moving tactile sensations in virtual environments, limiting user immersion.
Innovation Solution
A system that uses paired skin stimulation devices controlled by a hardware controller, receiving signals from a virtual environment source to simulate continuous tactile sensations across a user's body by varying stimulation intensity and timing at discrete points, allowing the brain to interpret these as moving sensations along a path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional haptic feedback devices are used to provide tactile sensations, then users can feel basic vibrations and movements, but the tactile sensations are simplistic and unrealistic
Solution Approach 1:
The system divides the tactile stimulation into multiple discrete points distributed across the user's body. Instead of using a single complex device, multiple simpler stimulation points work together to create complex moving sensations, resolving the contradiction between realism and device complexity.
Solution Approach 2:
The system transitions from traditional single-point or localized haptic feedback to distributed multi-point stimulation across the body surface. This dimensional expansion allows creation of moving tactile sensations that traverse across body areas, achieving realistic sensations without requiring each individual stimulation point to be highly complex.
2Reliability
If multiple stimulation points are used across the body to create moving tactile sensations, then realistic moving sensations are achieved, but the number of required stimulation points increases
Solution Approach 1:
The system applies different stimulation characteristics (intensity, timing, frequency) to different local points on the body. Each stimulation point has optimized local properties that contribute to the overall moving sensation, allowing realistic complex sensations to be created with fewer points than would be needed if all points used uniform stimulation.
Solution Approach 2:
The system stimulates only the necessary minimum number of points required to create the illusion of moving sensation across larger body areas. By strategically selecting and stimulating key points rather than uniformly stimulating all possible points, the system achieves realistic moving tactile sensations with reduced quantity of active stimulation points.
3Device complexity
If stimulation is applied at discrete points only, then device complexity is reduced, but the ability to produce moving tactile sensations across larger body areas is limited
Solution Approach 1:
The system pre-maps virtual environment contact points to corresponding physical stimulation points on the user's body. This preliminary mapping allows the simple discrete-point stimulation devices to effectively cover larger body areas by strategically positioning stimulation points and using temporal sequencing to create the illusion of sensation movement across uncovered areas.
Solution Approach 2:
The system creates a virtual mapping between the virtual environment's contact points and the user's body surface. This copying approach allows discrete physical stimulation points to represent and simulate sensations across larger body areas, achieving wide coverage without requiring physical stimulation devices at every location.
Data Source
AI summary
A illusory tactile sensation generation system and method via which a moving illusory tactile sensation may be created between spaced apart points on a user's skin using as few as two points of contact by varying the intensity at each point.