OLED Sealant With Islands For Bonding Strength
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Solution Overview
Problem
The reliability and lifespan of OLED displays are limited by the degradation of organic materials due to exposure to air and moisture, which affects the bonding strength of the sealant between the substrates, leading to inconsistent sealing and reduced product reliability.
Innovation Solution
An OLED display design featuring a sealant with a sealing portion and an adhesion reinforcing portion, where the adhesion reinforcing portion consists of islands within openings in the sealant, enhancing bonding strength without increasing the sealing width, and a manufacturing method involving laser irradiation to adhere the substrates using a sealant with specific structural features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the sealing width of the sealant is increased to improve bonding strength, then the bond strength increases, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The sealant is segmented into distinct functional regions: a sealing portion and an adhesion reinforcing portion with islands. This segmentation allows each region to perform its specific function optimally - the sealing portion provides the bonding interface while the adhesion reinforcing portion with islands enhances bonding strength through increased surface area and mechanical interlocking, resolving the contradiction by achieving high strength without requiring increased sealing width
Solution Approach 2:
The adhesion reinforcing portion is applied locally at specific positions rather than uniformly across the entire sealant. The islands are strategically positioned to provide enhanced adhesion where needed, allowing the sealant to achieve high bonding strength in critical areas without increasing the overall sealing width or complexity of the entire structure
2Reliability
If the sealing width is increased to protect organic materials from environmental degradation, then the reliability improves, but the manufacturing precision requirements increase
Solution Approach 1:
The sealant structure is divided into functional segments where the adhesion reinforcing portion with islands provides enhanced protection against environmental degradation without requiring an increase in overall sealing width. This segmentation allows reliability to be improved through optimized local structures rather than uniform width increases, thereby maintaining manufacturing precision requirements
3Ease of manufacture
If the sealant width is reduced to simplify manufacturing, then the ease of manufacture improves, but the bonding strength decreases
Solution Approach 1:
The adhesion reinforcing portion is applied locally at specific positions within the sealant structure rather than requiring uniform thickness or width throughout. This local application of reinforcement allows the sealant to maintain ease of manufacture with simpler fabrication processes while achieving high bonding strength through concentrated adhesion enhancement at critical locations
Solution Approach 2:
The sealant employs a composite structure combining the sealing portion and adhesion reinforcing portion with islands. This composite approach integrates materials or structures with different properties - the sealing portion for bonding and the adhesion reinforcing portion for enhanced adhesion - allowing the overall sealant to achieve high bonding strength while maintaining simple fabrication processes and ease of manufacture
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 enhanced bonding strength of the sealant increases the reliability and lifespan of OLED displays without widening the sealant, effectively protecting the organic materials from environmental degradation.
Implementation Method 1
adhering the first and second substrates together by irradiating a laser beam onto the sealant
Data Source
AI summary
An organic light-emitting diode (OLED) display is disclosed. In one aspect, the OLED display includes a first substrate and a second substrate facing each other, a display unit formed between the first and second substrates and a sealant formed between the first and second substrates and bonding the first and second substrates. The sealant includes a sealing portion surrounding and sealing the display unit, the sealing portion having a plurality of first openings separate from each other along a circumferential direction of the display unit. The sealant also includes an adhesion reinforcing portion including a plurality of islands that are respectively formed inside the first openings and separate from the sealing portion.