Flexible OLED Anti-Reflection Layer Selective Application

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Solution Overview

Problem

Flexible organic light-emitting diode displays are prone to damage due to repeated bending, particularly affecting the films and coating layers, which can lead to functional deterioration and damage from bending stress.

Innovation Solution

A flexible organic light-emitting diode display structure featuring a flexible substrate with an anti-reflection layer selectively applied to the emission areas, preventing damage from repeated bending by minimizing stress differences and maintaining display functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the anti-reflection layer is applied to the entire surface including non-emission areas, then the anti-reflection effect is improved, but the damage risk from bending stress increases

Engineering Contradiction:
Improvereflected lightVSAvoiddamage resistance
Core Design Contradiction:
Object-affected harmful factorsVSReliability

Solution Approach 1:

The anti-reflection layer is selectively applied only to the emission areas where light reflection needs to be reduced, while the non-emission areas remain without this layer. This localized application maintains the anti-reflection benefit for display quality while reducing the overall stress accumulation and damage risk from repeated bending operations.

Inventive Principle:
Principle #3Local quality

2Reliability

If films and coating layers are added to improve display function, then the display performance is improved, but the susceptibility to bending damage increases

Engineering Contradiction:
Improvedisplay functionVSAvoidbending resistance
Core Design Contradiction:
ReliabilityVSStrength

Solution Approach 1:

The anti-reflection layer is selectively applied only to the emission areas where light reflection needs to be reduced, while the non-emission areas remain without this layer. This localized application maintains the anti-reflection benefit for display quality while reducing the overall stress accumulation and damage risk from repeated bending operations.

Inventive Principle:
Principle #3Local quality

3Adaptability or versatility

If the display is made flexible for wearable applications, then the adaptability is improved, but the damage risk from repeated bending increases

Engineering Contradiction:
ImproveflexibilityVSAvoiddamage resistance
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The anti-reflection layer is selectively applied only to the emission areas where light reflection needs to be reduced, while the non-emission areas remain without this layer. This localized application maintains the anti-reflection benefit for display quality while reducing the overall stress accumulation and damage risk from repeated bending operations.

Inventive Principle:
Principle #3Local quality

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 damage and functional deterioration of flexible organic light-emitting diode displays during repeated bending operations, ensuring continued display performance and reducing the risk of stress-induced separation or damage between the display panel and anti-reflection layer.

Implementation Method 1

an organic light-emitting diode in which an anode, an organic emission layer and a cathode are sequentially laminated

Methodology Applied
Scientific EffectElectroluminescence: Electroluminescence

Implementation Method 2

the anti-reflection layer is disposed corresponding to the emission area except the non-emission area

Methodology Applied
Scientific EffectAnti-reflection: Anti-Reflective Coating

Data Source

PatentUS11069881B2Flexible organic light-emitting diode display
Publication Date: 2021.07.20 LG DISPLAY CO LTD
  • US11069881B2 patent drawing
  • US11069881B2 patent drawing
  • US11069881B2 patent drawing

AI summary

Provided is a flexible organic light-emitting diode display. The flexible organic light-emitting diode display includes a flexible substrate, a unit pixel and an anti-reflection layer. The unit pixel is disposed on the flexible substrate and includes an emission area and a non-emission area. The anti-reflection layer is disposed to correspond to the emission area except the non-emission area.