OLED Sealing Member Adhesion via Multi-Layer Varying Holes
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Solution Overview
Problem
Organic light-emitting display apparatuses face challenges with delamination of sealing members due to dead space reduction, which can lead to increased delamination risks.
Innovation Solution
The design includes a first substrate with a periphery area featuring a metal layer with differently sized holes, a second metal layer with overlapping holes, and a third metal layer, where the sealing member fills these holes to improve adhesion and reduce delamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the dead space is reduced to improve display area utilization, then the display efficiency is improved, but the adhesion of the sealing member deteriorates leading to delamination
Solution Approach 1:
The patent applies local quality by creating through-holes with varying cross-sectional sizes at different locations within the sealing member. The center region has a larger cross-sectional size while the end regions have smaller cross-sectional sizes. This non-uniform structure provides enhanced adhesion locally at the center where it is most needed, while maintaining overall compactness and minimizing dead space.
Solution Approach 2:
The sealing member is segmented into different regions with distinct through-holes having different cross-sectional sizes. This segmentation allows each region to serve a specific function: the larger center through-holes provide primary adhesion strength, while the smaller end through-holes provide secondary bonding and structural support, collectively improving reliability without increasing overall dead space.
2Ease of manufacture
If the sealing member structure is simplified to reduce manufacturing complexity, then the ease of manufacture is improved, but the bonding strength deteriorates
Solution Approach 1:
The patent changes the geometric parameter of the through-holes by varying their cross-sectional sizes along the length of the sealing member. This parameter variation is achieved through a single continuous forming process that creates the tapered structure, maintaining ease of manufacture while significantly improving bonding strength through optimized geometry rather than complex multi-component assembly.
Data Source
AI summary
An organic light-emitting display apparatus includes a first substrate corresponding to a display area and a periphery area, a second substrate facing the first substrate, a first metal layer at the periphery area of the first substrate, and defining a plurality of first holes, a second metal layer on the first metal layer, and defining a plurality of second holes that are differently sized than the first holes, a third metal layer on the second metal layer, and defining a plurality of third holes that are differently sized than the second holes, and a sealing member bonding the first substrate and the second substrate, and filling a partial region of the first, second, and third holes.