Piezoelectric Speaker Reverse-Phase Modulation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Piezoelectric ceramic speakers in electronic devices experience phase conflicts due to shockwaves, leading to sound quality distortions, which hinder the achievement of high-quality sound.

Innovation Solution

A reverse-phase modulating structure with a flexible unit, such as a silicon board or pressure spring, is used to modulate the in-phase movement of the ceramic acoustic generator by adjusting pressure, reducing phase conflicts and preventing sound quality distortions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If thin-type piezoelectric ceramic speakers are used in electronic devices, then the device size is reduced, but phase conflicts occur due to shockwaves causing sound quality distortion

Engineering Contradiction:

Improvespeaker sizeVSAvoidphase conflict and sound quality distortion

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

A flexible unit is introduced as an intermediary component between the ceramic acoustic generator and the shockwave source. This flexible unit modulates the shockwave pressure and redirects it to generate reverse-phase acoustic waves that cancel the harmful phase conflicts, thereby protecting the sound quality while maintaining the thin-type speaker design

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The shockwave that originally causes phase conflicts and sound distortion is converted into a beneficial force. By using the flexible unit to redirect and modulate the shockwave, reverse-phase acoustic waves are generated that actively cancel the harmful phase conflicts, transforming the harmful shockwave energy into a corrective mechanism

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 solution enhances sound quality by reducing phase conflicts and distortions, resulting in improved acoustic performance of ceramic speakers.

Implementation Method 1

Via pressure adjustments on or directed to the ceramic acoustic generator by the flexible unit, the in-phase movement of the ceramic acoustic generator is modulated

Methodology Applied

Scientific EffectPressure adjustment: Pressure Increase

Implementation Method 2

piezoelectric ceramic speaker

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentUS8824702B2Reverse-phase modulating structure of piezoelectric ceramic speaker

Publication Date: 2014.09.02 ABATECH ELECTRONICS CO LTD

AI summary

The present invention provides a reverse-phase modulating structure of a piezoelectric ceramic speaker, comprising a positioning frame, an acoustic generator and two or more than two flexible units; wherein the acoustic generator comprises a plurality of ceramic layers stacked onto one another to form a ceramic slat, and said flexible units are clamped between an inner edge of the positioning frame and the acoustic generator. Via the pressure exerted onto the acoustic member by the flexible units, the in-phase movement of the acoustic generator can be modulated and the phase conflict of the acoustic generator can be reduced as well as the prevision of the sound quality distortions such that high quality of the ceramic speaker can be enhanced and realized.