OLED Buffer Layer with Hydroxy Groups for Sealant Adhesion
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Solution Overview
Problem
Existing organic light emitting diode (OLED) displays face challenges in preventing moisture and oxygen penetration from the outside, which can damage the device and compromise its performance.
Innovation Solution
An OLED display is designed with an organic buffer layer containing a hydroxy or amide group on its entire surface, topped with a sealant, and a second substrate, where the sealant is an epoxy-based material that chemically couples with the buffer layer, enhancing the adhesive characteristic and sealing the space between the substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealant is applied to the edge of the second substrate to attach it to the first substrate, then the substrates are bonded together, but moisture and oxygen can still penetrate from the outside
Solution Approach 1:
The patent applies a hydrophobic coating film on the outer surface of the second substrate to prevent moisture and oxygen penetration. This thin film acts as a protective barrier while maintaining the structural integrity of the substrate, effectively blocking harmful substances without compromising the sealing performance of the sealant.
Solution Approach 2:
The patent combines the sealant (providing adhesive bonding) with a hydrophobic coating material (providing moisture and oxygen barrier) to create a composite protective structure. This composite approach leverages the complementary properties of different materials to simultaneously achieve strong bonding and effective protection against environmental factors.
2Manufacturing precision
If a space exists between the organic light emitting diode and the second substrate, then the OLED is positioned correctly, but the middle portion of the second substrate is damaged by external impact
Solution Approach 1:
The patent introduces a buffer layer between the OLED and the second substrate that can absorb and distribute external impacts before they reach the OLED. This cushioning layer is designed to deform under impact forces, protecting the fragile OLED components while maintaining proper positioning during manufacturing.
Solution Approach 2:
The patent uses a flexible buffer layer that can deform to absorb external impacts. This thin film structure maintains the positional relationship between the OLED and substrate while providing mechanical protection against impact forces, effectively decoupling the positioning function from the impact resistance function.
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
This configuration effectively prevents moisture and oxygen penetration, protecting the OLED from external impacts and improving its durability and reliability.
Implementation Method 1
the sealant is an epoxy-based material that chemically couples with the buffer layer, enhancing the adhesive characteristic
Implementation Method 2
An OLED display is designed with an organic buffer layer containing a hydroxy or amide group on its entire surface, topped with a sealant... effectively prevents moisture and oxygen penetration
Data Source
AI summary
An organic light emitting diode display and a method of manufacturing the same are disclosed. The organic light emitting diode display includes a first substrate, an organic light emitting diode that is positioned on the first substrate and includes a first electrode, an organic layer having at least a light emitting layer, and a second electrode, an organic buffer layer that is positioned on an entire surface of the organic light emitting diode and has a hydroxy group or an amide group, a sealant positioned on an entire surface of the organic buffer layer, and a second substrate positioned on the sealant.