Flexible Display Cushion for Heat Dissipation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Flexible display devices experience increased temperature due to convection and radiation between the heat dissipation plate and the support frame, leading to adverse effects on afterimages and lifespan.

Innovation Solution

A cushion portion with a conductive material is disposed between the display panel and the support frame, allowing heat dissipation from the heat dissipation plate to be exchanged and dissipated externally, eliminating the air gap and enhancing heat dissipation efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an air gap is formed between the display panel and support frame to prevent damage during bending, then the display panel is protected from external forces, but convection and radiation occur between the heat dissipation plate and support frame, increasing the temperature of the display panel

Engineering Contradiction:

Improvedisplay panel protectionVSAvoiddisplay panel temperature

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

A cushion portion is introduced as an intermediary component between the heat dissipation plate and support frame. This cushion portion fills the air gap and provides a thermal conduction path, allowing heat to be efficiently transferred from the display panel through the heat dissipation plate to the support frame, thereby reducing display panel temperature while maintaining the protective air gap structure

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention replaces the air gap (which relies on convection and radiation) with a solid cushion portion that enables direct thermal conduction. This substitution of heat transfer mechanism significantly improves thermal efficiency while preserving the mechanical protection function of the air gap

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If an air gap is formed between the display panel and support frame, then the display panel is protected from external forces, but heat dissipation efficiency is reduced due to convection and radiation

Engineering Contradiction:

Improvedisplay panel protectionVSAvoidheat dissipation efficiency

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The cushion portion acts as a thermal intermediary that bridges the air gap between the heat dissipation plate and support frame. By providing continuous thermal contact, it enables efficient heat conduction and eliminates the energy loss associated with convective and radiative heat transfer through air

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention replaces the air-based heat transfer system (convection and radiation) with a solid-based thermal conduction system using the cushion portion. This substitution dramatically improves heat dissipation efficiency by providing a direct thermal pathway from the display panel to the support frame

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 effectively reduces the surface temperature of the flexible display device, improving heat dissipation efficiency, brightness, lifespan, and afterimages, while also enhancing durability by absorbing external impacts.

Implementation Method 1

a cushion portion disposed between the heat dissipation plate and the support frame and formed to be elastically deformable... heat dissipated from the heat dissipation plate may be exchanged through the cushion portion and dissipated to the outside of the support frame

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

an elastically deformable cushion portion is disposed between the heat dissipation plate and the support frame so that the flexible display device exhibits improved durability by absorbing an externally applied impact by the cushion portion

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS12339707B1Flexible display device

Publication Date: 2025.06.24 LG DISPLAY CO LTD

AI summary

A flexible display device is provided with improved heat dissipation efficiency. The flexible display device includes: a support frame having an accommodating space formed therein; a display panel disposed in the accommodating space of the support frame; a heat dissipation plate disposed on the rear surface of the display panel; and a cushion portion disposed between the heat dissipation plate and the support frame and formed to be elastically deformable.