OLED Capping Member Bulkhead Structure Moisture Protection
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Solution Overview
Problem
Organic light emitting display devices are prone to degradation due to moisture sensitivity, leading to shortened lifespan and dark spots caused by electrochemical charge transfer reactions at the interface between electrodes and the organic substance layer.
Innovation Solution
A capping member with a bulkhead structure, comprising multiple bulkheads of the same height and length, forming polygonal or hexagonal capping areas, is integrated with a metal substrate to protect the organic light emitting elements from moisture, enhancing the device's strength and radiation characteristics while sealing the capping areas effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional plate-type capping member or iteratively stacked layer capping member is used, then the organic light emitting element is protected from moisture, but the device lacks sufficient strength and radiation characteristics
Solution Approach 1:
The capping member is formed as an integrated composite structure combining a metal substrate with a bulkhead portion protruding therefrom. The metal substrate provides structural strength while the bulkhead portion (formed of the same metal matter) creates sealed capping areas, achieving both mechanical strength and moisture protection in a single integrated component.
2Reliability
If a conventional plate-type capping member or iteratively stacked layer capping member is used, then the organic light emitting element is protected from moisture, but the device lacks radiation characteristics requiring an additional radiation sheet
Solution Approach 1:
The capping member is designed as a multi-functional integrated structure that simultaneously provides moisture protection through sealed capping areas and radiation characteristics through the inherent properties of the metal substrate and bulkhead configuration, eliminating the need for a separate radiation sheet and reducing overall device complexity.
3Object-affected harmful factors
If the organic light emitting element is exposed to moisture, then electrochemical charge transfer reactions occur at the interface, but proper sealing structure is needed to prevent this
Solution Approach 1:
The bulkhead portion includes multiple bulkheads that define separate capping areas, creating segmented sealed zones over the organic light emitting element. This segmentation approach ensures precise sealing in multiple discrete regions, effectively preventing moisture infiltration while maintaining manufacturing feasibility.
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 moisture infiltration, improves the display device's strength, and allows for efficient heat dissipation, thereby extending the lifespan and performance of the organic light emitting display devices by removing the need for a radiation sheet.
Implementation Method 1
allows for efficient heat dissipation
Data Source
AI summary
An organic light emitting display device which includes a base member; an organic light emitting display unit provided on one surface of the base member and configured to generate an image; an intermediate layer provided over the one surface of the base member and formed to be in contact with the organic light emitting display unit; and a capping member including a bulkhead member and a first member, wherein one surface of the first member is in contact with the intermediate layer, and the bulkhead member is protruded from an opposite surface of the first member to define a plurality of capping areas.