Sealing Member Openings for OLED Substrate Bonding
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Solution Overview
Problem
Organic light-emitting display apparatuses face challenges with large dead spaces due to sealing members used to bond substrates, which reduce display area efficiency and bonding strength.
Innovation Solution
The design incorporates an insulating layer with openings between conductive layers on the substrate, where the sealing member fills these openings, reducing dead space and enhancing bonding force by varying the width and shape of the openings to optimize contact area and material compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a sealing member is used to bond the lower substrate and the upper substrate, then the substrates are securely bonded, but the sealing member occupies a large area creating dead space that reduces display area efficiency
Solution Approach 1:
The sealing member is divided into multiple segments: a first sealing member in the peripheral area and a second sealing member in the display area. This segmentation allows the bonding function to be distributed, reducing the continuous occupation of display area while maintaining overall bonding strength through the combined action of multiple sealing segments.
Solution Approach 2:
The patent introduces a vertical layering dimension by placing different sealing members at different locations (peripheral area vs. display area) and potentially different heights. This dimensional approach allows bonding strength to be achieved through spatial distribution rather than requiring a large continuous sealing member footprint, thereby reducing dead space occupation.
2Strength
If the sealing member occupies a large area for bonding, then bonding strength is improved, but the dead space increases reducing overall device efficiency
Solution Approach 1:
By segmenting the sealing member into peripheral and display area components, the bonding function is achieved with minimized dead space. The segmented structure allows each sealing segment to contribute to overall bonding strength while the total occupied area is reduced, improving device efficiency through optimized space utilization.
3Area of stationary object
If openings are formed in the insulating layer, then the contact area between sealing member and insulating layers is increased, but the structural complexity increases
Solution Approach 1:
The insulating layer is segmented with multiple openings formed at specific locations. This segmentation increases the contact area between the sealing member and insulating layer by creating discrete contact points through the openings, while the modular nature of segmented openings makes the increased complexity manageable and localized rather than continuous and pervasive.
Data Source
AI summary
An organic light-emitting display apparatus including a first substrate including a display area and a peripheral area; a second substrate opposing the first substrate; an insulating layer disposed on the first substrate and including one or more openings; and a sealing member interconnecting the first substrate and the second substrate to each other and interposed between the first and second substrates. The one or more openings are disposed between a first conductive layer disposed on the display area and a second conductive layer disposed on the peripheral area. The one or more openings are at least partially or entirely filled with the sealing member.