Non-Planar Vibration Member for Sound Interference Reduction

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Solution Overview

Problem

Sound bars experience a reduction in sound quality and sound pressure level due to sound interference between multiple speakers.

Innovation Solution

A sound apparatus and system that includes a vibration member with a non-planar structure, a housing to cover the rear surface of the vibration member, and vibration devices to vibrate the vibration member, minimizing sound interference and enhancing sound separation for each channel or pitched sound band.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If multiple speakers are used to output sound, then sound output capability is improved, but sound interference occurs causing reduction in sound quality and sound pressure level

Engineering Contradiction:

Improvesound output capabilityVSAvoidsound interference

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The vibration member is divided into multiple regions (first to nth regions) where each region corresponds to a specific channel or pitched sound band. Each region is independently vibrated by dedicated vibration devices, enabling spatial and spectral separation of sound sources to prevent interference while maintaining multi-channel output capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the vibration member are assigned different functions based on their location. The vibration member includes first to nth regions that respectively correspond to different channels or pitched sound bands, allowing each local region to optimize its sound output characteristics without interfering with other regions

Inventive Principle:

Principle #3Local quality

2Speed

If reflected waves are present in the sound output path, then sound propagation is extended, but sound characteristic degradation occurs

Engineering Contradiction:

Improvesound propagationVSAvoidsound characteristic degradation

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The vibration member employs a non-planar three-dimensional structure with varying thickness throughout. This spatial configuration causes sound waves to propagate through different path lengths and directions, reducing coherent reflection and interference effects while maintaining sound output efficiency

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 effectively prevents or minimizes the reduction in sound characteristics caused by reflected waves and sound interference, enabling improved sound quality and pressure levels, particularly in stereo sound output.

Implementation Method 1

a vibration apparatus including one or more vibration devices configured to vibrate the vibration member

Methodology Applied

Scientific EffectVibration: Vibration

Implementation Method 2

sound interference between a plurality of speakers

Methodology Applied

Scientific EffectSound interference: Interference

Implementation Method 3

reduction in sound characteristic caused by a reflected wave

Methodology Applied

Scientific EffectReflected wave: Reflection

Data Source

PatentUS12309544B2Sound apparatus and sound system including the same

Publication Date: 2025.05.20 LG DISPLAY CO LTD

AI summary

A sound apparatus may include a vibration member, a housing configured to cover a rear surface of the vibration member, and a vibration apparatus including one or more vibration devices configured to vibrate the vibration member. The vibration member may include a non-planar structure.