Flexible Display Encapsulation Adhesion via Groove Anchoring
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Solution Overview
Problem
The existing organic light-emitting display apparatuses face issues with the release of encapsulation members at the interface between the display and the encapsulation member, which can lead to reduced durability and increased production costs due to premature failure during folding or handling of flexible displays.
Innovation Solution
The implementation of a structured encapsulation member with an inorganic layer and alternately stacked organic layers, combined with a substrate design featuring a hole with a lower portion of a first width and an upper portion of a second width, and a conductive material extending over the insulating layer, enhances the adhesion and prevents the release of the encapsulation member from the interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional encapsulation structure is used, then the manufacturing process is simple, but the encapsulation member releases at the interface between display and encapsulation member leading to reduced durability
Solution Approach 1:
The encapsulation member is divided into multiple sections: a first encapsulation section fully covering the display, and a second encapsulation section partially covering the display and extending into a groove. This segmentation allows the encapsulation member to better adhere to the display structure and prevent release at the interface, improving durability without requiring complete structural redesign
Solution Approach 2:
The second encapsulation section is nested within a groove formed in the substrate, creating an interlocked structure. This nesting arrangement mechanically anchors the encapsulation member to the display, preventing release at the interface while maintaining a relatively simple overall structure
2Reliability
If the encapsulation member is extended to improve adhesion, then the release force increases, but the manufacturing precision requirements increase
Solution Approach 1:
The groove is pre-formed in the substrate before the encapsulation member is applied. This preliminary action creates a predetermined anchoring structure that guides the positioning of the encapsulation member, reducing alignment precision requirements during manufacturing while ensuring adequate adhesion through the extended second encapsulation section
Data Source
AI summary
An organic light-emitting display apparatus and a method of manufacturing the same are provided. An organic light-emitting display apparatus includes: a substrate including an emission region and a non-emission region surrounding the emission region; a display device in the emission region of the substrate; an insulating layer in the non-emission region and including a hole having a lower portion having a first width and an upper portion having a second width less than the first width; and an encapsulation member covering the display device and the insulating layer and filling an inside of the hole.