Aligned Display Panel Edge Sealing for Thin Impact-Resistant Screens

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Solution Overview

Problem

Existing display devices face challenges in reducing thickness and width while maintaining impact-absorption and waterproof functions, leading to potential damage from external impacts and moisture penetration.

Innovation Solution

Incorporating a display panel with a support member and a cushion plate featuring a porous substrate, where the corresponding side surfaces of the display panel, support member, and cushion plate are aligned or coincident, and applying a resin to the side surfaces to enhance rigidity and prevent moisture permeation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If the thickness of the display device is reduced, then the portability and design are improved, but the impact-absorption function is reduced

Engineering Contradiction:
ImprovethicknessVSAvoidimpact-absorption function
Core Design Contradiction:
Length of stationary objectVSReliability

Solution Approach 1:

The patent employs a porous cushion plate positioned between the display panel and the case. The porous structure provides effective impact absorption while maintaining a thin profile, as the void spaces within the material allow for energy dissipation without requiring significant thickness.

Inventive Principle:
Principle #31Porous materials

Solution Approach 2:

The cushion plate is constructed as a composite structure combining a base material with a porous layer. This composite design integrates both structural support and impact absorption functions within a single thin component, resolving the contradiction between reduced thickness and maintained reliability.

Inventive Principle:
Principle #40Composite materials

2Length of stationary object

If the thickness of the display device is reduced, then the portability and design are improved, but the waterproof function is reduced

Engineering Contradiction:
ImprovethicknessVSAvoidwaterproof function
Core Design Contradiction:
Length of stationary objectVSReliability

Solution Approach 1:

The patent utilizes a thin waterproof film or coating applied to the cushion plate and surrounding structures. This thin film provides effective moisture barrier protection while maintaining the reduced thickness design, preventing water penetration without requiring thick protective layers.

Inventive Principle:
Principle #30Flexible shells and thin films

Solution Approach 2:

The waterproofing strategy employs composite construction where the cushion plate is combined with waterproof films and sealing materials. This multi-material approach achieves both thinness and effective waterproofing by integrating protection functions into the structural components.

Inventive Principle:
Principle #40Composite materials

3Reliability

If additional components are added to improve impact-absorption and waterproof functions, then the reliability is improved, but the thickness and width increase

Engineering Contradiction:
Improveimpact-absorption and waterproof functionsVSAvoidthickness and width
Core Design Contradiction:
ReliabilityVSLength of stationary object

Solution Approach 1:

The patent merges multiple functions into the cushion plate component. The cushion plate simultaneously serves as a structural support element, an impact-absorbing component, and a platform for waterproof sealing. This consolidation eliminates the need for separate components, maintaining thin dimensions while achieving reliable protection.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The cushion plate is designed as a multi-functional component that performs both impact absorption and waterproof sealing. By making this single component universal, the design avoids adding extra thickness or width that would result from using separate specialized components for each function.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 improves impact-absorption and waterproof functions while reducing the thickness and width of the display device, preventing damage and moisture ingress.

Implementation Method 1

a cushion plate disposed under the support member and including a porous substrate

Methodology Applied
Scientific EffectImpact absorption: Deformation

Implementation Method 2

a resin may be disposed on side surfaces of the display panel, the support member, and the cushion plate

Methodology Applied
Scientific EffectMoisture barrier: Permeation

Data Source

PatentEP4116763B1Display device
Publication Date: 2025.12.03 LG DISPLAY CO LTD
  • EP4116763B1 patent drawingFigure 1A
  • EP4116763B1 patent drawingFigure 1B~2A
  • EP4116763B1 patent drawingFigure 2B~3A

AI summary

The display device (1) removes a step of a display panel (10, 100), a support member (20, 200), and a cushion plate (30, 300) to increase a rigidity and prevent moisture permeation.