Haptic Waveform Control Using Dynamic Resonant Frequency

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing haptic feedback systems in electronic device controllers often consume excessive power and fail to accurately simulate haptic events due to variations in resonant frequencies and environmental conditions, leading to inefficient power usage and suboptimal user experience.

Innovation Solution

The system determines a dynamic resonant frequency of the haptic device, maps haptic information to this frequency, and adjusts amplitude to create a haptic waveform, using a combination of linear and eccentric rotating mass haptic devices to efficiently provide haptic feedback that aligns with intended haptic events.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If haptic feedback systems operate at fixed resonant frequency, then power consumption is reduced, but haptic accuracy deteriorates due to variations in resonant frequencies and environmental conditions

Engineering Contradiction:

Improvepower consumptionVSAvoidhaptic accuracy

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system dynamically adjusts the resonant frequency of the haptic device based on detected environmental conditions and device state, transitioning from a static fixed-frequency approach to a dynamic adaptive approach that maintains haptic accuracy while optimizing power consumption through conditional frequency adjustment

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the resonant frequency parameter in response to detected variations in environmental conditions and device state, allowing the haptic device to maintain optimal performance across different operating conditions rather than being constrained to a single fixed frequency

Inventive Principle:

Principle #35Parameter changes

2Reliability

If haptic feedback systems adjust resonant frequency dynamically, then haptic accuracy is improved, but power consumption increases

Engineering Contradiction:

Improvehaptic accuracyVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system performs frequency adjustments periodically or conditionally based on detected changes in environmental conditions or device state, rather than continuously, allowing the haptic device to maintain accuracy when needed while minimizing power consumption during stable operating conditions

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system uses feedback from environmental sensors and device state monitoring to intelligently determine when frequency adjustment is necessary, enabling accurate haptic feedback only when environmental variations exceed thresholds that would otherwise degrade performance

Inventive Principle:

Principle #23Feedback

3Use of energy by moving object

If haptic feedback uses fixed amplitude, then power consumption is reduced, but haptic realism deteriorates due to varying environmental conditions

Engineering Contradiction:

Improvepower consumptionVSAvoidhaptic realism

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system adjusts the amplitude parameter of haptic feedback based on detected environmental conditions and device state, allowing the haptic device to maintain realistic feedback characteristics across different operating conditions rather than using a fixed amplitude setting

Inventive Principle:

Principle #35Parameter changes

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

This approach conserves power while effectively simulating haptic events by adjusting amplitude and frequency to match intended haptic feedback, providing a more immersive user experience with reduced power consumption.

Implementation Method 1

the haptic device includes a linear haptic device configured to generate haptic feedback by moving a mass along a linear path

Methodology Applied

Scientific EffectLinear actuation: Linear Motor

Implementation Method 2

the haptic device includes an eccentric rotating mass haptic device configured to generate haptic feedback by rotating an off-center mass

Methodology Applied

Scientific EffectEccentric rotation: Eccentric

Implementation Method 3

determining a dynamic resonant frequency of the haptic device; mapping the haptic information to the dynamic resonant frequency; outputting a haptic waveform; and driving the haptic device according to the haptic waveform

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentUS12502602B2Systems and methods for arbitrary haptic waveform generation

Publication Date: 2025.12.23 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

A method of providing haptic feedback to a user includes, at an electronic device controller, determining a dynamic resonant frequency of a haptic device; receiving haptic information at an electronic device controller, mapping the haptic information to a resonant waveform with the dynamic resonant frequency; outputting a haptic waveform; and driving the haptic device according to the haptic waveform.