Patterned Graphite Heat Dissipation Layer for Foldable Displays

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Solution Overview

Problem

Existing flexible display devices face challenges in efficiently dissipating heat and preventing damage to the heat dissipation structure, which can lead to performance degradation and structural integrity issues.

Innovation Solution

A flexible display device incorporating a heat dissipation layer with a base heat dissipation layer and patterned heat dissipation patterns made of graphite, designed to improve heat dissipation efficiency and prevent damage by expanding the heat dissipation area through protruding shapes and grooves, allowing the layer to be rolled without contact loss.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a heat dissipation layer is used in flexible display devices, then heat dissipation efficiency is improved, but the heat dissipation structure may be damaged when rolled or folded

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidstructural integrity

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The heat dissipation layer is designed as a flexible thin film structure that can be rolled or folded without damage. The layer includes a base heat dissipation layer and heat dissipation patterns that maintain structural integrity during deformation, enabling the flexible display device to dissipate heat effectively while withstanding mechanical stress from rolling or folding operations.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The heat dissipation layer is segmented into a base heat dissipation layer and patterned heat dissipation regions. This segmentation allows different areas to serve different functions: the base layer provides overall heat dissipation while the patterned regions enhance localized heat management. The segmented structure also improves flexibility and resistance to damage during rolling or folding.

Inventive Principle:

Principle #1Segmentation

2Temperature

If heat dissipation patterns are added to the base heat dissipation layer, then heat dissipation area is expanded and efficiency is improved, but device complexity increases

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidstructure complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The heat dissipation patterns are integrated directly into the base heat dissipation layer as a unified structure, rather than being separate components. This merging approach expands the heat dissipation area while avoiding the complexity of assembling multiple separate parts. The patterns are formed through a molding process that creates both the base layer and patterns in one manufacturing step.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The base heat dissipation layer serves multiple functions: it provides the foundational heat dissipation path, supports the patterned heat dissipation regions, and maintains structural flexibility for rolling or folding. The heat dissipation patterns simultaneously enhance heat dissipation efficiency and contribute to the overall structural integrity of the flexible display device.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Temperature

If heat dissipation patterns protrude in the thickness direction, then heat dissipation performance is enhanced, but manufacturing precision requirements increase

Engineering Contradiction:

Improveheat dissipation performanceVSAvoidpattern formation precision

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The heat dissipation patterns are designed with specific geometric parameters (protruding shapes with controlled dimensions and spacing) that optimize heat dissipation performance. By carefully selecting and controlling these parameters during the molding process, the invention achieves enhanced heat dissipation while maintaining manufacturability through standard molding techniques.

Inventive Principle:

Principle #35Parameter changes

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 enhances heat dissipation performance and prevents structural damage, ensuring reliable operation of flexible display devices even when rolled or folded.

Implementation Method 1

The heat dissipation layer may include graphite

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS12520643B2Heat dissipation layer and flexible display device including the same

Publication Date: 2026.01.06 SAMSUNG DISPLAY CO LTD

AI summary

According to an embodiment of the disclosure, a flexible display device includes a display part including a light emitting element disposed on a base layer, and a panel cover disposed on a rear surface of the display part and including a heat dissipation layer. The heat dissipation layer includes a base heat dissipation layer, and a heat dissipation pattern patterned on the base heat dissipation layer.