Stretchable Display Connection Line Encapsulation
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Solution Overview
Problem
Existing display devices struggle to protect stretchable connection lines from moisture and oxygen, leading to potential damage and reduced reliability.
Innovation Solution
A display device design that incorporates a stretchable lower substrate with a second encapsulation layer covering the stretchable connection lines, along with a fluorine-based residual film on the front surface to minimize moisture penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If stretchable connection lines are exposed in the display device, then manufacturing complexity is reduced, but reliability deteriorates due to moisture and oxygen damage
Solution Approach 1:
The encapsulation structure is segmented into two distinct layers: a first encapsulation layer covering the light-emitting elements and a second encapsulation layer specifically covering the stretchable connection lines. This segmentation allows each layer to be optimized for its specific protective function, with the second layer providing specialized moisture and oxygen barrier protection for the connection lines without complicating the overall manufacturing process.
Solution Approach 2:
The second encapsulation layer acts as an intermediary protective barrier between the stretchable connection lines and the harmful external environment (moisture and oxygen). This intermediate layer specifically targets the connection lines that are otherwise exposed, providing the necessary protection while maintaining the stretchable nature of the display device.
2Reliability
If a second encapsulation layer is added to cover connection lines, then protection from moisture and oxygen is improved, but device complexity increases
Solution Approach 1:
The first and second encapsulation layers are merged into a unified encapsulation structure that covers both the light-emitting elements and the stretchable connection lines. This merging approach allows the two layers to work together as an integrated protective system, reducing the overall device complexity compared to having separate, independent encapsulation systems for each component.
Solution Approach 2:
The encapsulation layers serve multiple functions simultaneously: the first encapsulation layer protects the light-emitting elements, while the second encapsulation layer protects the stretchable connection lines. Both layers together provide a comprehensive barrier against moisture and oxygen for all critical components, achieving multi-functionality without requiring separate specialized protection systems.
3Object-affected harmful factors
If fluorine-based residual film is formed on front surface, then moisture penetration is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The front surface incorporates a fluorine-based residual film as a composite material layer with specific hydrophobic properties. This fluorine-containing layer, formed through plasma treatment or chemical vapor deposition, creates a composite structure that combines the base substrate material with fluorine compounds to achieve enhanced moisture resistance without requiring extremely tight manufacturing tolerances.
Solution Approach 2:
The surface properties of the front surface are modified by introducing fluorine-based compounds, which change the surface energy and hydrophobicity parameters. This parameter change approach allows the surface to inherently resist moisture penetration through chemical composition modification rather than relying on precise physical barrier dimensions, thereby reducing manufacturing precision requirements.
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 solution effectively protects the stretchable connection lines from moisture and oxygen, enhancing their reliability and longevity while allowing for flexible display configurations.
Implementation Method 1
a fluorine-based residual film on the front surface to minimize the penetration of moisture
Implementation Method 2
a second encapsulation layer configured to cover the plurality of stretchable connection lines
Data Source
AI summary
A display device may include a stretchable lower substrate, a plurality of plate patterns disposed on the stretchable lower substrate and spaced apart from one another, a plurality of light-emitting elements disposed on the plurality of plate patterns, a plurality of stretchable connection lines disposed between the plurality of plate patterns, a first encapsulation layer configured to cover the plurality of light-emitting elements, and a second encapsulation layer configured to cover the plurality of stretchable connection lines. Therefore, the second encapsulation layer may be formed to cover the plurality of stretchable connection lines, which may protect the plurality of stretchable connection lines from moisture and oxygen and improve the reliability of the plurality of stretchable connection lines.