OLED Display Edge Sealing via Interception Layer
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Solution Overview
Problem
Thin film encapsulation technology in OLED displays is ineffective in preventing moisture and oxygen penetration at the edges and surface, leading to display failures and reduced lifespan.
Innovation Solution
An interception layer made of inorganic or metal materials, positioned outside the display unit, intercepts surface-directed moisture and oxygen penetration, while a thin film encapsulation layer with alternating inorganic and organic films addresses penetration in the thickness direction, ensuring comprehensive sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If thin film encapsulation layer covers the display area, then the OLED display can be made slim and flexible, but edge protection is insufficient leading to display failure
Solution Approach 1:
The encapsulation system is segmented into the thin film encapsulation layer for maintaining slim profile and the extended interception layer for enhancing edge protection and lifespan. This segmentation allows the display to remain thin and flexible while simultaneously improving reliability at the edges through the additional protection layer.
Solution Approach 2:
The interception layer is nested with the thin film encapsulation layer, where the interception layer extends beyond the encapsulation layer at the edges. This nested arrangement allows the thinner encapsulation layer to maintain the slim display profile while the extended interception layer provides additional edge protection without significantly increasing overall thickness.
Data Source
AI summary
An organic light emitting diode (OLED) display comprises: a substrate; a display unit formed on the substrate and including an organic light emitting element; an interception layer positioned at the outside of the display unit on the substrate; and a thin film encapsulation layer which is formed with a stacked film of an inorganic film and an organic film, which has an end portion contacting the interception layer, and which covers the entire display unit and at least a part of the interception layer.