Metal Pattern Oxygen Scavenging in OLED Encapsulation
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Solution Overview
Problem
Organic light emitting display devices face degradation due to oxygen reactivity with organic materials, leading to reduced lifespan and performance.
Innovation Solution
Incorporating a metal pattern with high reactivity to oxygen in the non-display region, which reacts with oxygen instead of the organic materials in the display region, thereby encapsulating the display area and preventing molecular structure changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic materials are used in the display region, then the display device achieves light emission and image display, but the organic materials react with oxygen leading to degradation and reduced lifespan
Solution Approach 1:
A metal pattern layer is introduced as an intermediary between the organic light emitting materials and the oxygen in the non-display region. This metal layer acts as a sacrificial component that reacts with oxygen preferentially, protecting the organic materials from oxidation and thereby extending device lifespan while maintaining display performance
Solution Approach 2:
The high reactivity of certain metals with oxygen is converted from a potentially harmful characteristic into a beneficial protective mechanism. By placing a metal pattern with high oxygen reactivity in the non-display region, the oxygen is consumed by the metal rather than the organic materials, transforming the harmful oxidation effect into a protective sacrificial reaction that enhances device reliability
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
This solution effectively suppresses the reaction between oxygen and organic materials, enhancing the lifespan and reliability of the display device by using materials like aluminum with high electron affinity.
Implementation Method 1
the metal pattern includes a material having a high reactivity with oxygen as compared with an organic material
Data Source
AI summary
A display device includes: a first substrate including a display region and a non-display region provided at at least one side of the display region; a plurality of pixel units provided in the display region on the first substrate; a metal pattern provided in the non-display region on the first substrate; and a second substrate opposite to the first substrate, the second substrate being joined with the first substrate to encapsulate the display region, wherein the metal pattern includes a material having a high reactivity with oxygen as compared with an organic material.