OLED Display Panel Screen Printing Hydrophobic Wall
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Solution Overview
Problem
Conventional packaging methods for OLED display panels fail to effectively prevent moisture and oxygen from penetrating into the hermetic space, leading to degradation of the organic thin film and reduced device performance and lifespan.
Innovation Solution
A packaging method involving the simultaneous formation of a supporter and hydrophobic wall on the OLED device using screen printing, with a hydrophobic wall positioned outside the supporter to block moisture and oxygen, utilizing an organic silicon solution with long chain silane coupling agents and fluorinated alkyl triethoxysilane, and curing with UV rays to create a hermetic seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional package method with UV glue and support elements is used, then the OLED substrate and cover plate can be bonded to form a hermetic space, but moisture and oxygen can penetrate into the hermetic space via the support elements, degrading the organic thin film
Solution Approach 1:
The support structure is divided into multiple functional parts: support elements for mechanical support and a separate hydrophobic wall structure for moisture and oxygen barrier functionality. This segmentation allows each component to specialize in its specific function, with the hydrophobic wall specifically designed to block moisture and oxygen penetration paths that would otherwise go through or around the support elements.
Solution Approach 2:
The hydrophobic wall acts as an intermediary barrier between the external environment (moisture and oxygen) and the hermetic space containing the organic thin film. This intermediate structure provides an additional protective layer that specifically addresses the penetration issue without interfering with the mechanical support function.
2Reliability
If separate formation processes are used for support elements and hydrophobic wall, then each component can be optimized independently, but the manufacturing process becomes complex and time-consuming
Solution Approach 1:
The support elements and hydrophobic wall are combined into a single integrated structure formed by screen printing. This merging allows both components to be created in one manufacturing step using the same equipment and process parameters, eliminating the need for separate formation processes while maintaining the distinct functional characteristics of each component through appropriate material selection and structural design.
Solution Approach 2:
The screen printing process is designed to perform multiple functions simultaneously: it forms both the support elements and the hydrophobic wall structure in a single operation. This multi-functionality approach simplifies the manufacturing process by consolidating what would otherwise require separate steps, while still achieving the complex dual-function structure needed for effective protection.
3Reliability
If multiple separate packaging steps are used, then each step can be optimized for its specific function, but the overall packaging time and production cost increase
Solution Approach 1:
The formation of support elements and hydrophobic wall is merged into a single screen printing operation, eliminating the need for multiple separate packaging steps. This consolidation maintains package quality by ensuring proper integration of both components while significantly improving productivity by reducing the number of process steps, handling operations, and production time required.
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 method significantly improves the packaging effect, extends the lifespan of the OLED device by preventing moisture and oxygen ingress, and simplifies the manufacturing process while reducing costs and time.
Implementation Method 1
forming simultaneously a supporter and a hydrophobic wall on an outer position of and enclosing the OLED device
Implementation Method 2
curing a material of the supporter by UV ray
Data Source
AI summary
The present invention is to provide an Organic Light-Emitting Diode (OLED) display panel and a package method thereof. The method includes forming simultaneously a supporter and a hydrophobic wall on an outer position of and enclosing the OLED device by screen printing, wherein the hydrophobic wall is on an outer position of the supporter; and bonding the cover plate and the OLED substrate. The present invention can effectively protect the OLED device from outer moisture and oxygen to improve package effect and increase life of the OLED device. The supporter and the hydrophobic wall are formed simultaneously by screen printing so the method is simple and the manufacturing efficiency is improved.