Display Panel Vibration Structure for Directional Sound Output

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Solution Overview

Problem

Display apparatuses face challenges with speaker placement, which limits design and degrades sound quality due to sound interference, reducing viewer immersion.

Innovation Solution

A vibration apparatus comprising a lower and upper vibration structure with an adhesive member, generating sound waves of different frequencies to output directivity-based sound.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a separate speaker is installed in a display apparatus, then sound can be provided, but the speaker occupies space and limits design freedom

Engineering Contradiction:

Improvedesign freedomVSAvoidspace occupied by speaker

Core Design Contradiction:

Ease of manufactureVSVolume of moving object

Solution Approach 1:

The patent merges the speaker function with the display panel by making the display panel itself vibratable. The display panel is equipped with a vibration generator that directly vibrates the panel to produce sound, eliminating the need for a separate speaker component and thus freeing up space while maintaining design freedom.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The display panel serves dual functions: visual display and sound output. By enabling the display panel to generate sound through vibration, the system achieves multi-functionality, reducing the need for additional dedicated components and optimizing space utilization.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If sound is output from a speaker in a display apparatus, then sound can be provided, but sound quality degrades due to interference between reflected sounds

Engineering Contradiction:

Improvesound qualityVSAvoidsound interference from reflections

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs mechanical vibration of the display panel itself to generate sound waves. By directly vibrating the panel at specific frequencies using a vibration generator, the system produces sound with controlled directivity, reducing the impact of reflected sound interference and improving overall sound quality.

Inventive Principle:

Principle #18Mechanical vibration

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

Enhances sound quality by focusing sound in a specific direction, improving immersion and sound pressure levels, particularly in the middle-low-pitched range.

Implementation Method 1

a lower vibration structure, an upper vibration structure on the lower vibration structure, and an adhesive member between the lower vibration structure and the upper vibration structure, wherein the lower vibration structure and the upper vibration structure are configured to generate sound waves having different frequencies

Methodology Applied

Scientific EffectVibration: Vibration

Data Source

PatentUS12457445B2Vibration apparatus, apparatus and vehicle including the same

Publication Date: 2025.10.28 LG DISPLAY CO LTD

AI summary

A vibration apparatus comprises a lower vibration structure, an upper vibration structure on the lower vibration structure, and an adhesive member between the lower vibration structure and the upper vibration structure. The lower vibration structure and the upper vibration structure are configured to generate sound waves having different frequencies.