UV Viscosity-Releasing Adhesive for Flexible OLED Repair
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Solution Overview
Problem
The low yield rate and difficulty in repairing flexible OLED displays due to immature full lamination technology and the tendency of the encapsulating layer to tear, resulting in damage and zero dismantling utilization.
Innovation Solution
A display module with a viscosity-releasing adhesive layer, specifically an ultraviolet (UV) viscosity-releasing optical adhesive, is used between the polarizing and cover layers, allowing for easier separation and improving the repairability of the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full lamination technology is used for flexible OLED display, then the display structure is complete and protective, but the yield rate is quite low and repairability is poor
Solution Approach 1:
The patent divides the encapsulation structure into separate layers: the first encapsulation layer is integrated with the OLED, while the second encapsulation layer is added separately through lamination. This segmentation allows the second layer to be applied without damaging the first layer, improving both yield rate and repairability by enabling independent handling of each encapsulation layer.
Solution Approach 2:
The patent applies the first encapsulation layer to the OLED before lamination, creating a pre-encapsulated structure. This preliminary action protects the OLED during subsequent manufacturing steps and enables the second encapsulation layer to be laminated without causing tears, thereby improving yield rate while maintaining repairability.
2Strength
If optical adhesive is used to bond polarizing layer and cover layer, then the layers are firmly attached, but dismantling utilization is almost zero and repair is not possible
Solution Approach 1:
The patent changes the bonding mechanism from permanent chemical bonding (optical adhesive) to reversible mechanical bonding (micro-catch structure). The micro-catch structure consists of protrusions and corresponding recesses that provide strong bonding strength during use but allow for easy dismantling by applying force to release the mechanical interlock, enabling repair and reuse.
Solution Approach 2:
The patent introduces a bonding layer with micro-catch structure as an intermediary between the polarizing layer and cover layer. This intermediary structure provides both strong bonding during operation and controlled release during dismantling, solving the contradiction between bonding strength and repairability.
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 use of a UV viscosity-releasing adhesive layer facilitates separation of the cover layer from the polarizing layer, enhancing the successful repair rate of the display module.
Implementation Method 1
an ultraviolet (UV) viscosity-releasing optical adhesive, allowing for easier separation and improving the repairability of the display
Data Source
AI summary
The present disclosure proposes a display module, a manufacturing method, and an electronic device. The display module includes a display panel, a polarizing layer on the display panel, a cover layer on the polarizing layer, and an adhesive layer between the polarizing layer and the cover layer. The adhesive layer is a viscosity-releasing adhesive layer.