Flexible Display Panel Optical Clear Resin Bonding
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Solution Overview
Problem
Flexible display panels face issues with panel laminating peeling and cracking due to different degrees of stretching and compression in film layers, especially under high bending stress, which limits their application and reliability.
Innovation Solution
A flexible display panel structure is designed with optical clear resin (OCR) fluid glue layers and anti-overflow barriers to bond the cover plate, touch panel, and OLED device, using a trapezoidal configuration to reduce shear stress and peeling risks, along with an optically clear adhesive for the backplate, allowing for adjustable thickness and improved bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional film layers with different moduli are used for binding between devices, then the laminated structure can be formed, but the bending performance is limited and peeling/cracking occurs under high bending stress
Solution Approach 1:
The patent changes the physical parameters of the bonding material by using OCR fluid glue with adjustable thickness (3-5 micrometers) and appropriate viscosity, allowing optimization of both bonding strength and flexibility to prevent peeling and cracking under bending stress
Solution Approach 2:
The patent employs a composite structure combining OCR fluid glue layers with anti-overflow barriers made of flexible materials, creating a laminated structure that maintains strong bonding while providing the flexibility needed to prevent cracking during bending operations
2Ease of manufacture
If film layers with different moduli are laminated together, then device binding is achieved, but different degrees of stretching and compression occur causing peeling and cracking
Solution Approach 1:
The patent applies anti-overflow barriers at specific locations (edges and critical areas) of the laminated structure to locally manage stress distribution, preventing peeling and cracking while maintaining ease of manufacture through targeted application rather than uniform treatment
Solution Approach 2:
The patent controls the thickness parameter of the OCR fluid glue layer (3-5 micrometers) to optimize the balance between ease of lamination and resistance to stretching/compression differential, ensuring panel integrity while maintaining manufacturing simplicity
3Reliability
If thicker glue layers are used to reduce stress, then peeling risk decreases, but the laminated structure becomes bulkier and less flexible
Solution Approach 1:
The patent optimizes the thickness parameter of the OCR fluid glue layer to a specific range (3-5 micrometers), which is thin enough to maintain flexibility and avoid excessive bulk but sufficient to provide adequate bonding strength and stress distribution to prevent peeling
Solution Approach 2:
The patent uses fluid glue with appropriate viscosity that can dynamically adapt during the lamination process, allowing the material to flow and distribute evenly at thin thickness while maintaining bonding effectiveness, thus avoiding the need for thicker rigid layers
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 OCR fluid glue layers provide ultra-thin bonding with adjustable thickness, reducing shear stress and peeling risks between film layers, enhancing the durability and reliability of flexible display panels by minimizing cracking and peeling.
Implementation Method 1
a first optical clear resin (OCR) fluid glue layer is filled in a space formed by the first quadrilateral anti-overflow barrier and the cover plate, and the first OCR fluid glue layer bonds the cover plate to the touch panel
Implementation Method 2
an optically clear adhesive (OCA) disposed between the OLED device and the backplane to bond the OLED device and the backplate
Data Source
AI summary
A flexible display panel structure and fabricating method thereof. The flexible display panel structure includes a cover plate, a touch panel, an organic light-emitting diode device, and a backplate disposed, which are sequentially disposed, wherein a first optical clear resin fluid glue layer is disposed between the cover plate and the touch panel, and the first optical clear resin fluid glue layer bonds the cover plate to the touch panel, which is beneficial to reduce risk of panel cracking and peeling.