Anti-fingerprint Coating Compound for Foldable Display Wear Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Foldable electronic devices with hard coatings face limitations in scratch resistance and wear resistance due to vulnerability to external impacts and repetitive touch, and existing soft protective layers lack durability and recovery force.
Innovation Solution
An anti-fingerprint coating compound with a top portion containing two or three perfluoropolyether moieties, a trivalent or tetravalent linker, and an end portion with a siloxane moiety is applied to create a display protective layer, enhancing bonding strength and wear resistance by forming multiple Si-O bonds with the hard coating layer, and achieving an uneven surface structure for increased lotus effect and hydrophobicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a hard coating is applied to a window and protective layer to secure folding characteristics, then folding characteristics are improved, but scratch resistance and wear resistance deteriorate due to vulnerability to external impacts
Solution Approach 1:
The patent applies a composite coating system consisting of a hard coating layer containing inorganic particles and a soft protective layer with anti-fingerprint coating compounds. This composite structure combines the scratch resistance of the hard coating with the wear resistance and flexibility of the soft layer, resolving the contradiction between hardening for scratch protection and maintaining flexibility for folding characteristics.
Solution Approach 2:
The patent creates different functional zones: the hard coating layer provides scratch resistance and structural integrity, while the soft protective layer with anti-fingerprint compounds provides wear resistance, flexibility, and self-cleaning properties. Each layer performs its specific function optimally, allowing the system to achieve both scratch resistance and folding characteristics.
2Duration of action of moving object
If a soft protective layer is used to maintain flexibility, then folding characteristics are improved, but durability and recovery force deteriorate
Solution Approach 1:
The soft protective layer is formulated as a composite material containing anti-fingerprint coating compounds with perfluoropolyether moieties and siloxane groups. This composite structure provides both flexibility for folding and enhanced durability through the cross-linked network formed by the coating compounds, resolving the contradiction between flexibility and durability.
Solution Approach 2:
The patent modifies the chemical parameters of the protective layer by incorporating specific anti-fingerprint coating compounds with controlled molecular structures (perfluoropolyether moieties and siloxane groups). These parameter changes enhance the polymer's cross-linking density and molecular weight, thereby improving recovery force and durability while maintaining flexibility.
3Reliability
If anti-fingerprint coating compounds with multiple perfluoropolyether moieties are used, then bonding strength and wear resistance are improved, but manufacturing complexity increases
Solution Approach 1:
The anti-fingerprint coating compound is segmented into distinct functional modules: perfluoropolyether moieties for bonding strength, trivalent or tetravalent linking groups for cross-linking, and siloxane moieties for wear resistance. This segmentation allows each component to be optimized independently and simplifies the coating application process by providing clear functional guidance for material selection and formulation.
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 display protective layer exhibits high durability and excellent wear resistance, maintaining antifouling properties even after partial wear or cracking, suitable for flexible and foldable display devices with improved scratch resistance and hydrophobicity.
Implementation Method 1
enhancing bonding strength and wear resistance by forming multiple Si-O bonds with the hard coating layer
Implementation Method 2
achieving an uneven surface structure for increased lotus effect and hydrophobicity
Data Source
AI summary
Provided is an anti-fingerprint coating compound including a top portion, a linker, and an end portion, in which the top portion includes two or three perfluoropolyether moieties, the linker linking the top portion to the end portion is a trivalent or tetravalent linking group, and the end portion includes a siloxane moiety.