Adaptive Tactile Feedback via Pressing Force Detection
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Solution Overview
Problem
Existing tactile sense presentation devices only present absolute constant hardness for materials, failing to adapt to varying forces of touch, resulting in a lack of realism in virtual tactile experiences.
Innovation Solution
A tactile sense presentation device comprising a storage device for image data, a screen display circuit, a tactile sense presentation circuit, a pressing force detection circuit, and a control circuit that adjusts the tactile feedback based on the hardness of the object and the detected pressing force, allowing for dynamic adaptation of tactile sensations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If absolute constant hardness is presented for each material, then the device complexity is reduced, but the tactile sense realism deteriorates
Solution Approach 1:
The patent applies dynamics by making the tactile feedback adaptive rather than static. The vibration device dynamically adjusts its response based on the pressing force detected by the pressing force detection circuit, transitioning from constant hardness presentation to variable hardness presentation that matches real-world tactile experiences.
Solution Approach 2:
The patent implements feedback through the pressing force detection circuit that continuously monitors the force applied by the user and feeds this information back to the control circuit. The control circuit then adjusts the vibration device's output accordingly, creating a closed-loop system that adapts tactile feedback to user input for enhanced realism.
2Reliability
If the tactile sense is made adaptive to pressing force, then the tactile sense realism is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a multi-functional system where the same components serve multiple purposes. The pressing force detection circuit not only detects force but also provides feedback for control. The control circuit integrates multiple functions including signal processing, hardness calculation, and vibration device control, reducing the need for separate dedicated components.
Solution Approach 2:
The patent utilizes parameter changes by varying the vibration device's output parameters (amplitude, frequency) based on the detected pressing force. The control circuit adjusts these parameters dynamically to match the hardness characteristics of different materials and user interaction intensity, achieving realistic tactile feedback through parameter modulation rather than complex hardware changes.
Data Source
AI summary
An embodiment is a tactile sense presentation device including a storage device configured to store image data indicating an object, a screen display circuit configured to display the object on a screen on a basis of the image data, a tactile sense presentation circuit configured to present a tactile sense corresponding to hardness of the object to a person, a pressing force detection circuit configured to detect a pressing force generated when a person touches the tactile sense presentation circuit, and a control circuit configured to change the tactile sense to be presented by the tactile sense presentation circuit on a basis of the hardness of the object and the pressing force detected by the pressing force detection circuit.