Rollable Display Panel Structure for Flatness and Noise Control

Solution Overview

Problem

Existing display devices face challenges in improving sound quality and preventing noise generation, particularly in flexible display panels that are rollable or foldable.

Innovation Solution

The implementation of a flexible display panel with a magnetically attached module cover and a rigid structure that includes a panel protection portion, beads for rigidity, and a specific cable management system to maintain panel flatness and reduce noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a flexible display panel is implemented to enable rolling or folding, then adaptability and form factor versatility are improved, but noise generation increases and sound quality deteriorates due to mechanical stress and panel deformation

Engineering Contradiction:

Improveform factor versatilityVSAvoidnoise generation

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by providing rigid support structures (beads) at specific locations on the flexible display panel where mechanical stress occurs during rolling or folding. These localized rigid elements prevent panel deformation and associated noise without compromising the overall flexibility and adaptability of the display device.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements beforehand cushioning by pre-installing rigid support structures (beads) on the flexible display panel before rolling or folding operations. These support structures proactively prevent mechanical stress and panel deformation that would otherwise occur during handling, storage, or transportation, thereby preventing noise generation in advance.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If a flexible display panel is implemented to enable rolling or folding, then adaptability and form factor versatility are improved, but sound quality deteriorates due to mechanical stress and panel deformation

Engineering Contradiction:

Improveform factor versatilityVSAvoidsound quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by providing rigid support structures (beads) at specific locations on the flexible display panel where mechanical stress occurs during rolling or folding. These localized rigid elements prevent panel deformation and associated noise without compromising the overall flexibility and adaptability of the display device.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements beforehand cushioning by pre-installing rigid support structures (beads) on the flexible display panel before rolling or folding operations. These support structures proactively prevent mechanical stress and panel deformation that would otherwise occur during handling, storage, or transportation, thereby preventing noise generation in advance.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Ease of operation

If the display panel is made flexible for rolling or folding, then ease of operation is improved, but the panel flatness deteriorates due to mechanical stress

Engineering Contradiction:

Improveease of rollingVSAvoidpanel flatness

Core Design Contradiction:

Ease of operationVSShape

Solution Approach 1:

The patent applies local quality by providing rigid support structures (beads) at specific locations on the flexible display panel where mechanical stress occurs during rolling or folding. These localized rigid elements prevent panel deformation and associated noise without compromising the overall flexibility and adaptability of the display device.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements beforehand cushioning by pre-installing rigid support structures (beads) on the flexible display panel before rolling or folding operations. These support structures proactively prevent mechanical stress and panel deformation that would otherwise occur during handling, storage, or transportation, thereby preventing noise generation in advance.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 and minimizes noise generation by ensuring the display panel remains flat and reduces mechanical stress, thereby improving durability and performance.

Implementation Method 1

a magnetically attached module cover

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentEP4113490B1Display device

Publication Date: 2026.04.01 LG ELECTRONICS INC

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AI summary

Disclosed is a display device. The display device of the present disclosure includes: a flexible display panel; a roller which extends long, and around which the display panel is wound, or from which the display panel is unwound; a housing which provides an accommodating space therein, wherein the roller is rotatably mounted in the accommodating space; and a speaker assembly which is located between the roller and the housing, and placed on a bottom of the housing, wherein the housing includes a front cover which is located inside a front surface of the housing, is fixed to the bottom of the housing, and has a coupling hole, wherein the speaker assembly includes a coupling portion which is formed in an upper side of the speaker assembly, and inserted into the coupling hole.