Multi-Layer Hard Coating Window for Display Impact Resistance
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Solution Overview
Problem
Display devices with plastic windows face challenges in achieving sufficient impact resistance, particularly when attached to vehicles, as existing plastic materials are prone to breakage and lack the necessary strength to withstand external impacts.
Innovation Solution
A window structure for display devices is designed with a base layer, a first hard coating layer, and a second hard coating layer, where the second hard coating layer has a thickness less than the first hard coating layer, and both layers are made with materials like acryl, epoxy, and acrylic oligomer, providing enhanced compressive strength and resistance to impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If glass is used as a front window, then mechanical strength is improved, but weight increases and vulnerability to external impact occurs
Solution Approach 1:
The patent applies composite materials by combining plastic base layer with multiple hard coating layers (first and second hard coating layers with different thicknesses). This composite structure provides high mechanical strength and impact resistance while maintaining the lightweight advantage of plastic materials, resolving the contradiction between strength and weight.
2Weight of moving object
If plastic materials are used as window substitute, then weight is reduced and breakage susceptibility decreases, but impact resistance is insufficient
Solution Approach 1:
The patent uses composite materials by combining plastic base layer with multiple hard coating layers. The plastic provides lightweight and breakage resistance, while the hard coating layers (especially the first hard coating layer with greater thickness) provide enhanced impact resistance, thus resolving the contradiction between weight reduction and impact resistance.
Solution Approach 2:
The patent applies local quality by creating a multi-layer structure where different layers have different properties and thicknesses. The first hard coating layer has greater thickness than the second hard coating layer, with each layer positioned to provide specific local protection against impacts, thereby enhancing overall impact resistance while maintaining lightweight characteristics.
3Ease of manufacture
If single hard coating layer is applied, then manufacturing complexity is reduced, but impact resistance and stress distribution are insufficient
Solution Approach 1:
The patent applies segmentation by dividing the hard coating into multiple distinct layers (first hard coating layer and second hard coating layer with different thicknesses). This segmented structure enables better stress distribution and enhanced impact resistance compared to a single layer, while still maintaining reasonable manufacturing complexity through sequential coating processes.
Data Source
AI summary
A window for a display device includes: a base layer; a first hard coating layer on the base layer; and a second hard coating layer on the first hard coating layer and having a thickness less than a thickness of the first hard coating layer, where the first hard coating layer is between the base layer and the second hard coating layer.