Vibration Control Device Sine Wave Synthesis

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Solution Overview

Problem

Current haptic feedback devices struggle to effectively adjust the cycle and amplitude of sine waves to enhance the haptic function provided by vibration elements, limiting their ability to provide diverse and intuitive user experiences.

Innovation Solution

A vibration control device that includes a sampling frequency signal generator and a sine wave synthesizer, utilizing a digital filter to adjust the frequency and amplitude of sine waves by changing coefficients, allowing for improved haptic feedback through a linear resonant actuator or piezoelectric actuator.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If additional pressure sensors or actuators are installed to enhance haptic feedback, then haptic perception quality is improved, but device complexity and space requirements increase

Engineering Contradiction:

Improvehaptic perception qualityVSAvoiddevice complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent changes the parameters of the sine wave signal (frequency, amplitude, cycle) through digital filter coefficients to enhance haptic feedback quality without adding physical components. By adjusting coefficients in the digital filter, the system modifies the vibration characteristics delivered to the user, achieving improved haptic perception while maintaining the same hardware configuration.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical approach of adding more physical sensors and actuators with a signal processing approach. Instead of increasing hardware complexity, the system uses digital signal processing techniques to modify the sine wave characteristics, substituting mechanical expansion with electronic/software-based solutions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If additional pressure sensors or actuators are installed to enhance haptic feedback, then haptic perception quality is improved, but space requirements increase

Engineering Contradiction:

Improvehaptic perception qualityVSAvoidspace requirements

Core Design Contradiction:

Manufacturing precisionVSArea of stationary object

Solution Approach 1:

The patent achieves improved haptic perception by changing the parameters of the vibration signal through digital filter coefficient adjustment rather than adding physical components. This allows quality enhancement without increasing the physical footprint of the device.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The existing vibration actuator is made multi-functional through signal processing. By adjusting digital filter coefficients, the same physical actuator can produce different vibration patterns and haptic effects, making it universal for various haptic feedback scenarios without requiring additional space.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If digital filter coefficients are adjusted to change sine wave characteristics, then haptic feedback diversity is improved, but control complexity increases

Engineering Contradiction:

Improvehaptic feedback diversityVSAvoidcontrol complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent uses parameter changes in digital filter coefficients to achieve diverse haptic feedback. By systematically adjusting frequency, amplitude, and cycle parameters through coefficient modification, the system creates multiple vibration patterns from a single actuator, improving feedback diversity while keeping the control mechanism unified and manageable.

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

The device enhances the haptic function by allowing for precise adjustment of sine wave characteristics, thereby improving user experience and feedback in electronic devices, such as computers and mobile devices, by providing a more intuitive and diverse range of haptic perceptions.

Implementation Method 1

The sine wave synthesizer includes the digital filter, and is configured to adjust at least one of a frequency of the sine wave and an amplitude of the sine wave using the sampling frequency signal, and a plurality of coefficients of the digital filter

Methodology Applied

Scientific EffectDigital filtering: Filter (electronic)

Implementation Method 2

the vibration device may be a linear resonant actuator or a piezoelectric actuator

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentUS9720503B2Vibration control device and computing device including the same

Publication Date: 2017.08.01 SAMSUNG ELECTRONICS CO LTD

AI summary

A vibration control device configured to provide a haptic function and control a vibration device driven by a sine wave. The vibration control device includes a sampling frequency signal generator and a sine wave synthesizer. The vibration control device is configured to generate a sampling frequency signal using a clock signal, wherein the sampling frequency signal is related to an operation cycle of a digital filter; and the sine wave synthesizer includes the digital filter. The digital filter is configured to adjust at least one of a cycle of the sine wave and amplitude of the sine wave using the sampling frequency signal and a plurality of coefficients of the digital filter; and generate an adjusted sine wave.