Composite Display Panel Structure for Thinness and Thermal Rigidity

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Solution Overview

Problem

Existing display devices face challenges in ensuring structural rigidity and preventing thermal deformation, particularly in large-screen and ultra-thin designs, while maintaining high temperature reliability.

Innovation Solution

A display device structure incorporating a material complexed panel composed of a core sandwiched between front and rear skins made of metal, bonded using hot-melt adhesives, with additional features like inner frames and a side frame to enhance rigidity and dissipate heat.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If the display device is designed to be ultra-thin, then the thickness is reduced and portability is improved, but structural rigidity deteriorates

Engineering Contradiction:
ImprovethicknessVSAvoidstructural rigidity
Core Design Contradiction:
Length of moving objectVSStrength

Solution Approach 1:

The patent employs a composite panel structure consisting of a core layer sandwiched between front and rear skin layers. This sandwich composite structure provides enhanced structural rigidity while maintaining an ultra-thin profile, as the distributed material arrangement creates high moment of inertia relative to the thin overall thickness.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The panel is segmented into multiple functional layers (front skin, core, rear skin) with distinct roles. The front and rear skins provide structural integrity and surface functionality, while the core provides spacing and additional rigidity, allowing each layer to be optimized for its specific function while collectively achieving both thinness and rigidity.

Inventive Principle:
Principle #1Segmentation

2Reliability

If the display device operates at high temperature, then performance is maintained, but thermal deformation increases

Engineering Contradiction:
Improvehigh temperature reliabilityVSAvoidthermal deformation
Core Design Contradiction:
ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent modifies the thermal parameters of the panel by selecting materials with appropriate thermal expansion coefficients and heat dissipation properties. The core layer material is specifically chosen to have thermal characteristics that compensate for expansion in the skin layers, maintaining dimensional stability at elevated temperatures.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The multi-layer composite structure provides thermal management benefits through the different thermal properties of each layer. The core material acts as a thermal buffer between the front and rear skins, reducing thermal gradients and preventing differential expansion that would cause deformation.

Inventive Principle:
Principle #40Composite materials

3Area of stationary object

If the display device is made large-screen, then display area is increased, but structural stability deteriorates

Engineering Contradiction:
Improvedisplay areaVSAvoidstructural stability
Core Design Contradiction:
Area of stationary objectVSStability of the object's composition

Solution Approach 1:

The large panel is segmented into a multi-layer sandwich structure with the core providing internal support. This segmentation creates a distributed load-bearing system where each layer contributes to overall stability, preventing the entire large area from behaving as a single flexible element.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent adds structural strength in the third dimension (thickness direction) through the sandwich construction, which creates moment resistance without significantly increasing the overall thickness. This dimensional approach allows large screen areas to maintain stability by leveraging the geometric properties of the layered structure.

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 provides structural rigidity and prevents thermal deformation, ensuring high temperature reliability and improved bending and torsional stiffness, while allowing for a thin and durable display device design.

Implementation Method 1

bonded using hot-melt adhesives

Methodology Applied
Scientific EffectHot-melt adhesive bonding: Adhesive

Data Source

PatentEP4345803B1Display device
Publication Date: 2026.03.18 LG ELECTRONICS INC
  • EP4345803B1 patent drawingFigure 1
  • EP4345803B1 patent drawingFigure 2
  • EP4345803B1 patent drawingFigure 3

AI summary

A display device is provided. The display device includes: a display panel; a material complexed plate (130) disposed at a rear of the display panel; and a side frame (140) which is disposed between the display panel and the material complexed plate (130) and is fixed to the material complexed plate (130), and to which the display panel is coupled, wherein the material complexed plate (130) includes: a front skin forming a front surface; a rear skin forming a rear surface and facing the front skin; and a core disposed between the front skin and the rear skin and including fibers; and an inner frame (210) formed by recessing the front skin or the rear skin, wherein the inner frame (210) includes: horizontal inner lines (211,212,213) elongated in one direction; and vertical inner lines (214,215) elongated in a direction intersecting the one direction.