Composite Sheet with Nested Graphite for OLED Heat Dissipation

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Solution Overview

Problem

Organic light-emitting display devices face heat deterioration due to internal heat generation, necessitating effective heat dissipation methods while maintaining thinness and rigidity.

Innovation Solution

A composite sheet comprising a shock mitigating layer with an elastic member and a graphite layer, along with first and second heat dissipation sheets, enhances thermal conductivity and rigidity, efficiently dissipating heat from the display device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If heat dissipation materials are added to improve heat dissipation, then heat dissipation efficiency is improved, but device thickness increases

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoiddevice thickness

Core Design Contradiction:

TemperatureVSLength of stationary object

Solution Approach 1:

The graphite layer is nested within the elastic member of the shock mitigating layer, allowing the heat dissipation function to be integrated into the existing structure without adding external thickness. The receiving groove accommodates the graphite layer inside the elastic member, creating a compact nested arrangement that maintains thinness while providing heat dissipation.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent uses a composite structure combining elastic member material with graphite heat dissipation material. This composite approach allows the shock mitigating layer to simultaneously provide mechanical cushioning and thermal conduction, improving heat dissipation efficiency without requiring separate additional heat dissipation components that would increase thickness.

Inventive Principle:

Principle #40Composite materials

2Temperature

If graphite layer is added to improve heat dissipation, then heat dissipation efficiency is improved, but device complexity increases

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidstructure complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The patent merges the heat dissipation function with the shock mitigating layer by incorporating the graphite layer into the elastic member. This integration combines two functions (shock absorption and heat dissipation) into a single composite structure, reducing device complexity compared to having separate heat dissipation components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The elastic member serves multiple functions: it provides mechanical shock absorption and simultaneously acts as a heat dissipation pathway through the integrated graphite layer. This multi-functionality reduces the need for separate dedicated components, thereby reducing overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If shock mitigating layer is added to improve durability, then durability is improved, but heat dissipation capability worsens

Engineering Contradiction:

ImprovedurabilityVSAvoidheat dissipation capability

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The shock mitigating layer uses a composite material structure where the elastic member is combined with graphite. This composite construction allows the layer to simultaneously provide mechanical durability through the elastic member and heat dissipation capability through the graphite, eliminating the trade-off between durability and heat dissipation.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The graphite layer is nested within the elastic member structure, allowing the shock mitigating layer to maintain its primary mechanical function while incorporating heat dissipation capability. The nested arrangement ensures that the shock absorption and heat dissipation functions coexist without compromising either durability or thermal management.

Inventive Principle:

Principle #7Nested doll (Nesting)

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 composite sheet effectively dissipates heat, improves durability, and maintains the thinness of organic light-emitting display devices, ensuring efficient heat release and structural integrity.

Implementation Method 1

a graphite layer accommodated in the elastic member, a first heat dissipation sheet configured to be attached to one surface of the shock mitigating layer, and a second heat dissipation sheet configured to be attached to another surface of the shock mitigating layer

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS10046536B2Composite sheet and display device including the same

Publication Date: 2018.08.14 SAMSUNG DISPLAY CO LTD

AI summary

According to an embodiment of the present invention, a composite sheet includes a shock mitigating layer including an elastic member and a graphite layer accommodated in the elastic member, a first heat dissipation sheet configured to be attached to one surface of the shock mitigating layer, and a second heat dissipation sheet configured to be attached to another surface of the shock mitigating layer.