Motor Driving Signal Segmentation for Heavy Tactile Feedback
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Solution Overview
Problem
Existing motor driving signals for tactile feedback in applications like games and car control screens fail to provide a low-frequency and heavy tactile effect, as the braking segment does not efficiently decrease vibration intensity to meet user expectations.
Innovation Solution
A motor driving signal is generated with an acceleration segment, followed by a constant segment signal for continuous low-frequency vibration and an attenuating segment signal for gradual vibration decrease, ensuring the motor achieves a low-frequency and heavy tactile effect by adjusting parameters for optimal braking efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the braking segment of the short signal is designed to rapidly decrease vibration intensity from peak level to zero level, then the tactile effect becomes simple and concentrated, but the low-frequency and heavy tactile effect is not provided
Solution Approach 1:
The braking segment is divided into multiple sub-segments with different signal characteristics. The first sub-segment maintains high amplitude for a extended duration to provide low-frequency heavy tactile effect, while subsequent sub-segments gradually reduce amplitude to bring vibration to zero. This segmentation allows the system to achieve both rapid braking efficiency and quality tactile feedback.
Solution Approach 2:
The patent changes the parameters of the braking signal by introducing multiple sub-segments with varying amplitudes and durations. Instead of a single rapid decay, the signal parameters are adjusted across different sub-segments to maintain low-frequency vibration characteristics while still achieving effective braking. This parameter variation enables the tactile output to match user expectations for heavy, low-frequency feedback.
2Loss of time
If the braking segment decreases vibration intensity rapidly to zero level, then the signal duration is short, but the user experience of low-frequency and heavy tactile effect is not achieved
Solution Approach 1:
The braking segment is segmented into multiple sub-segments where the first sub-segment has a longer duration to sustain low-frequency heavy tactile effect, while later sub-segments complete the braking process. This segmentation allows the overall signal to remain relatively short while providing adequate time for quality tactile feedback in the critical first sub-segment.
Solution Approach 2:
The patent employs periodic action within the braking segment by using multiple sub-segments with rhythmic amplitude variations. This periodic structure within the braking phase allows the motor to generate sustained low-frequency vibrations that perceive as heavy tactile effect, while the entire braking process remains time-efficient.
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
The new signal design enhances the fidelity of tactile feedback in scenarios like games and automobile control screens by providing a natural and realistic low-frequency and heavy tactile experience, improving user engagement.
Implementation Method 1
An electrical signal with a specially designed waveform can be used to drive a linear motor to achieve vibration
Data Source
AI summary
A method of generating motor driving signal includes: obtaining acceleration segment signal for driving motor to start vibrating, constant segment signal for achieving low-frequency vibration tactile effect of the motor, and attenuating segment signal for decreasing vibration quantity of the motor in low frequency manner, frequency of constant segment signal and of attenuating segment signal being smaller than frequency of acceleration segment signal; splicing the acceleration segment signal with the constant segment signal, and reserving idle period with no signal output therebetween to obtain first motor driving signal; adjusting parameter of constant segment signal of first motor driving signal according to vibration feeling requirement, and splicing attenuating segment signal after the adjusted first motor driving signal to obtain second motor driving signal; and adjusting parameter of attenuating segment signal of second motor driving signal, and determining second motor driving signal with highest braking efficiency as final motor driving signal.