Virtual Key Haptics With Edge and Center Tactile Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing virtual haptic feedback systems fail to accurately replicate the complex haptic sensations of physical keys by solely using excitation signals, lacking the ability to differentiate between edge and central tactile sensations.
Innovation Solution
A method and device that generates tactile sensations by outputting specific drive signals to a haptic reproduction module based on the position of a virtual functional area, using a combination of first, second, and third signals with distinct time periods and amplitudes to simulate edge and central tactile sensations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single haptic feedback signal is used to indicate key activation, then the device complexity is reduced, but the tactile sensation accuracy deteriorates
Solution Approach 1:
The patent segments the haptic feedback into two distinct types: boundary tactile sensation (generated when finger touches the edge of virtual key) and central area tactile sensation (generated when finger touches the middle of virtual key). Each type uses different drive signals with specific frequency and amplitude characteristics, allowing accurate replication of physical key sensations without requiring a single complex feedback mechanism
Solution Approach 2:
The patent applies local quality by generating different tactile sensations at different locations of the virtual key. The boundary area produces a first tactile sensation with specific signal characteristics, while the central area produces a second tactile sensation with different characteristics. This spatial differentiation of haptic feedback accurately reproduces the varying tactile experiences of physical keys
2Ease of operation
If simple presence or absence of vibration is used for feedback, then the ease of operation is improved, but the haptic sensation realism deteriorates
Solution Approach 1:
The patent introduces dynamics by making the haptic feedback adaptable to different interaction states. The control module dynamically selects between boundary tactile sensation and central area tactile sensation based on the detected touch position. The drive signals also dynamically adjust frequency and amplitude parameters to match the specific haptic state, transforming static feedback into dynamic, context-aware feedback
Solution Approach 2:
The patent applies parameter changes by modifying the frequency and voltage amplitude parameters of the drive signals based on the tactile sensation type. Boundary sensations use specific frequency-amplitude combinations different from central area sensations. This parameter variation enables the system to accurately simulate the diverse tactile experiences of physical keys while maintaining simple operational control
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the haptic feedback experience by accurately reproducing the boundary and central tactile sensations of virtual keys, providing a more realistic simulation of physical keys.
Implementation Method 1
an actuator works to drive a substrate to generate vibration
Data Source
AI summary
A haptic reproduction device includes a display module, a haptic reproduction module and a control module. The tactile sensation generation method includes: acquiring a position of a virtual functional area touched by a user and detected by the display module; outputting a first drive signal to the haptic reproduction module through the control module when the position of the virtual functional area touched by the user is an edge position of the virtual functional area, so that the haptic reproduction module generates a boundary tactile sensation; outputting a second drive signal to the haptic reproduction module through the control module when the position of the virtual functional area touched by the user is a middle position of the virtual functional area, so that the haptic reproduction module generates a haptic feedback.