OLED Back Cover Reinforcing Bent Portion Heat Dissipation

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Solution Overview

Problem

Organic light emitting diodes (OLEDs) face degradation and brightness deviation due to internal heat generation, leading to reduced display quality and lifespan, especially as they increase in size, and lack sufficient rigidity and effective heat dissipation without increasing production costs.

Innovation Solution

An OLED design incorporating a heat dissipation member between the OLED panel and a back cover with a reinforcing bent portion to enhance rigidity and efficiently dissipate heat, using materials like aluminum with high thermal conductivity and a burring joining method to attach the heat dissipation member to the back cover, minimizing production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a heat dissipation member is added between the OLED panel and back cover, then heat dissipation effectiveness is improved, but device complexity increases

Engineering Contradiction:

Improveheat dissipation effectivenessVSAvoidstructure complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The back cover is designed with a reinforcing bent portion that simultaneously provides structural reinforcement and serves as an integrated heat dissipation pathway. This multi-functional design eliminates the need for a separate heat dissipation member, thereby improving heat dissipation effectiveness while avoiding increased device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines the heat dissipation function with the back cover structure by forming a heat dissipation pathway through the reinforcing bent portion. This merging of functions integrates thermal management into the existing structural component, achieving effective heat dissipation without adding separate parts or increasing overall device complexity.

Inventive Principle:

Principle #5Merging (Combining)

2Area of stationary object

If the OLED panel size is increased, then display area is improved, but heat generation and deterioration increase

Engineering Contradiction:

Improvedisplay areaVSAvoidOLED deterioration

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent addresses heat dissipation in the vertical dimension by creating a heat dissipation pathway that extends from the OLED panel through the back cover's reinforcing bent portion to the external environment. This three-dimensional heat dissipation approach effectively manages heat generation in large-area OLED panels, preventing deterioration while maintaining the increased display area.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Temperature

If a heat dissipation member is added, then heat dissipation is improved, but production cost increases

Engineering Contradiction:

Improveheat dissipationVSAvoidproduction cost

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The back cover's reinforcing bent portion is designed to simultaneously provide structural support and heat dissipation functions. This multi-functional approach eliminates the need for additional heat dissipation components, thereby maintaining production cost efficiency while achieving effective heat dissipation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

By integrating the heat dissipation function into the existing back cover structure through the reinforcing bent portion, the patent avoids the need for separate heat dissipation members. This consolidation reduces component count and assembly steps, thereby improving ease of manufacture and reducing production costs while maintaining effective heat dissipation.

Inventive Principle:

Principle #5Merging (Combining)

4Area of stationary object

If the OLED panel size is increased, then display area is improved, but rigidity decreases

Engineering Contradiction:

Improvedisplay areaVSAvoidrigidity

Core Design Contradiction:

Area of stationary objectVSStrength

Solution Approach 1:

The reinforcing bent portion of the back cover introduces a curved geometric structure that enhances rigidity. This curved design provides structural reinforcement to the large-area OLED panel, improving overall rigidity and strength while maintaining the increased display area.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 prevents thermal steps, reduces brightness deviation, and extends OLED lifespan by improving heat dissipation and rigidity without increasing production costs, ensuring consistent display quality and longevity.

Implementation Method 1

a heat dissipation member (140) dissipating heat produced from the OLED panel (110) to the outside

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

a back cover (120) supporting the OLED panel (110), and a reinforcing bent portion (123) formed in the back cover (120) to improve rigidity of the OLED (100)

Methodology Applied

Scientific EffectGeometric reinforcement: Geometry

Data Source

PatentEP2947708B1Organic light emitting diode

Publication Date: 2021.04.21 LG DISPLAY CO LTD

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Figure 2~3A
Figure 3B~4B

AI summary

Disclosed is an organic light emitting diode (OLED) that includes an OLED panel (110); a back cover (120) supporting the OLED panel (110) and including a reinforcing bent portion (123); and a heat dissipation member (140) between the OLED panel (110) and the back cover (120).