Composite Film for Flexible Display Cover Window
Solution Overview
Problem
Flexible display devices require a cover window with antistatic, antifouling, and chemical-resistant functions, but forming multiple functional layers complicates the process and can reduce adhesive strength to the substrate.
Innovation Solution
A composite film with a functional layer comprising an acrylate-based binder and an acrylamide-based monomer is used, which maintains adhesive strength even with the inclusion of antistatic and antifouling agents, allowing for a single layer with multiple functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple functional layers are formed for antistatic, antifouling, and chemical-resistant functions, then the functional performance is improved, but the manufacturing process becomes complicated and adhesive strength to substrate is reduced
Solution Approach 1:
The patent combines multiple functional layers (antistatic layer, antifouling layer, and chemical-resistant layer) into a single integrated functional layer. This functional layer contains antistatic agents, antifouling agents, and crosslinking agents simultaneously, thereby providing all required functions while simplifying the manufacturing process to only two coating steps and maintaining strong adhesive strength to the polyimide substrate.
2Reliability
If multiple functional layers are formed for antistatic, antifouling, and chemical-resistant functions, then the functional performance is improved, but the adhesive strength to substrate is reduced
Solution Approach 1:
The patent combines multiple functional layers (antistatic layer, antifouling layer, and chemical-resistant layer) into a single integrated functional layer. This functional layer contains antistatic agents, antifouling agents, and crosslinking agents simultaneously, thereby providing all required functions while simplifying the manufacturing process to only two coating steps and maintaining strong adhesive strength to the polyimide substrate.
Solution Approach 2:
The functional layer uses a composite material system comprising polyacrylic acid, polyacrylamide, and crosslinking agents (glycerol and ethylene glycol). This composite formulation provides multifunctionality (antistatic, antifouling, chemical resistance) while ensuring strong adhesion to the polyimide substrate through the specific chemical interactions of these materials.
3Device complexity
If various functions are implemented in a single layer, then the manufacturing process is simplified, but the adhesive strength to substrate is reduced
Solution Approach 1:
The functional layer uses a composite material system comprising polyacrylic acid, polyacrylamide, and crosslinking agents (glycerol and ethylene glycol). This composite formulation provides multifunctionality (antistatic, antifouling, chemical resistance) while ensuring strong adhesion to the polyimide substrate through the specific chemical interactions of these materials.
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 composite film achieves high adhesive strength, antistatic, antifouling, and chemical-resistant properties, simplifying the manufacturing process and enhancing the performance of flexible display devices as a cover window.
Implementation Method 1
the functional layer comprises an acrylate-based binder and an acrylamide-based monomer
Data Source
AI summary
The composite film according to an embodiment adopts an acrylate-based binder and an acrylamide-based monomer in a single functional layer for antistatic, antifouling, and chemical resistant functions to exhibit flexible characteristics without deteriorating the adhesive strength to a substrate; thus, it can be applied as a cover window of a flexible display device.