Display Panel Sound Generation Rear Surface Partitioning

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Solution Overview

Problem

Conventional display apparatuses face challenges in directing sound towards the user while maintaining improved sound quality, as sound generated by external speakers often deflects towards the lower or rear portion of the display panel, leading to poor sound distribution and quality.

Innovation Solution

The display apparatus incorporates a sound generating device with a bobbin and a protection member, strategically placed on the rear surface of the display panel, which vibrates to generate sound, thereby directing it towards the user. This configuration includes partitions and specific sound generating device structures to enhance sound output characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a speaker is provided in the display apparatus, then sound can be generated, but the sound advances toward the lower or rear portion of the display panel instead of the front portion

Engineering Contradiction:

Improvesound directionVSAvoidsound quality deterioration

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent inverts the conventional speaker placement by positioning the sound generating device on the rear surface of the display panel rather than inside the display apparatus. This inversion changes the sound propagation direction from rearward to forward, allowing sound to advance toward the user in front of the display panel.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent moves the sound generating device from the internal three-dimensional space of the display apparatus to the external two-dimensional plane of the rear surface. This dimensional change enables sound to be generated at the boundary surface, directing it forward into the user's space rather than backward into the apparatus interior.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If a speaker is provided in the display apparatus, then sound can be generated, but the speaker occupies space that restricts design and spatial disposition

Engineering Contradiction:

Improvedesign flexibilityVSAvoidspeaker space

Core Design Contradiction:

Adaptability or versatilityVSVolume of stationary object

Solution Approach 1:

The patent extracts the sound generating device from the internal volume of the display apparatus and relocates it to the external rear surface. This extraction eliminates the space occupation problem, allowing the display apparatus to maintain a compact design without internal speaker volume, while still providing sound generation capability.

Inventive Principle:

Principle #2Taking out (Extraction)

3Device complexity

If sound advances toward the lower or rear portion of the display panel, then the display apparatus structure is simple, but sound quality is deteriorated due to interference with sound reflected on the wall or floor

Engineering Contradiction:

Improvesound generating structureVSAvoidsound reflection interference

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent inverts the sound propagation direction from the conventional rearward path (toward wall/floor reflections) to a forward path (toward the user). By positioning the sound generating device on the rear surface and directing sound forward through the display panel, the patent eliminates the harmful reflection interference while maintaining structural simplicity.

Inventive Principle:

Principle #13The other way round (Inversion)

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 solution effectively directs sound towards the user, improving sound quality by minimizing interference from surrounding reflections and allowing for a more immersive audio experience without the need for external speakers.

Implementation Method 1

a sound generating device on a rear surface of the display panel, wherein the sound generating device includes a bobbin and a protection member on the bobbin

Methodology Applied

Scientific EffectVibration: Vibration

Data Source

PatentUS12267657B2Display apparatus

Publication Date: 2025.04.01 LG DISPLAY CO LTD

AI summary

A display apparatus includes a display panel configured to display an image by emitting light, the display panel including a first area, a second area, and a third area; a first sound generating device in the first area, the first sound generating device including two sub-sound generating devices; a second sound generating device in the second area, the second sound generating device including two sub-sound generating devices; a third sound generating device in the third area; a first partition between the first area and the third area; a second partition between the second area and the third area; a third partition in a periphery of the display panel; and a fourth partition between the two sub-sound generating devices in each of the first area and the second area.