Transparent Laminate for Display Window Panels
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Solution Overview
Problem
Tempered glass used in mobile devices is prone to breaking and scattering upon impact, and its high specific gravity makes it unsuitable for lightweight and thin mobile devices, necessitating a lighter and stronger alternative for display device window panels.
Innovation Solution
A transparent laminate comprising a transparent material layer with laminated transparent high-elasticity and high-hardness layers, where the high-elasticity layer has a Young's modulus of less than or equal to 10 MPa and the high-hardness layer has a surface hardness of at least 6H, providing improved impact resistance and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tempered glass is used as a window panel, then surface hardness and impact resistance are improved, but weight increases due to high specific gravity
Solution Approach 1:
The patent applies composite materials by combining a transparent material layer with transparent high-elasticity layers and transparent high-hardness layers to create a laminate structure. This composite structure achieves both high impact resistance and reduced weight compared to traditional tempered glass, as the plastic-based composite has lower specific gravity while maintaining protective properties through the synergistic combination of elastic and hard layers.
Solution Approach 2:
The patent changes the material parameters by specifying a Young's modulus of less than or equal to about 10 MPa for the high-elasticity layer and a surface hardness of greater than or equal to about 6H for the high-hardness layer. These parameter specifications enable the laminate to achieve optimal balance between elasticity for impact absorption and hardness for surface protection, while maintaining lightweight properties.
2Reliability
If tempered glass is used as a window panel, then protection against external impact is improved, but the device becomes thicker and heavier
Solution Approach 1:
The laminate structure uses multiple thin layers (transparent material layer, high-elasticity layers, and high-hardness layers) that collectively provide protection equivalent to or better than tempered glass. The composite design allows each layer to be relatively thin while the combination achieves the required protection capability, thereby reducing overall thickness compared to traditional tempered glass solutions.
3Strength
If a single transparent material layer is used, then device complexity is reduced, but impact resistance and hardness are insufficient
Solution Approach 1:
The patent employs a composite laminate structure consisting of a transparent material layer, transparent high-elasticity layers laminated on both sides, and transparent high-hardness layers. This multi-layer composite design achieves superior impact resistance and surface hardness compared to single-layer structures, with each layer serving a specific function: the elastic layers absorb impact energy while the hard layers provide surface protection.
Solution Approach 2:
The patent applies local quality by assigning different functional properties to different layers: the high-elasticity layers (Young's modulus ≤ 10 MPa) provide impact absorption at specific locations, while the transparent high-hardness layers provide surface scratch resistance where needed. This localized functional differentiation achieves comprehensive protection without requiring uniform thickening of the entire structure.
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 laminate offers enhanced impact resistance and reduced weight, making it suitable for use in display devices, vehicles, and windows, while maintaining a thin and lightweight profile, effectively replacing traditional tempered glass.
Implementation Method 1
a transparent high-elasticity layer laminated on both sides of the transparent material layer, wherein the transparent high-elasticity layer may have a Young's modulus of less than or equal to about 10 MPa
Implementation Method 2
a transparent high-hardness layer, wherein the transparent high-hardness layer is formed on or directly on the transparent high-elasticity layer by sequentially laminating the transparent high-elasticity layer that is laminated on both sides and wherein the transparent high-hardness layer has a surface hardness of greater than or equal to a pencil hardness of about 6H
Implementation Method 3
a transparent laminate includes: a transparent material layer; a transparent high-elasticity layer laminated on both sides of the transparent material layer
Data Source
AI summary
In one aspect, a transparent laminate, including a transparent material layer, a transparent high-elasticity layer laminated on both sides of the transparent material layer and having Young's modulus of less than or equal to about 10 MPa, and a transparent high-hardness layer sequentially laminated on the transparent high-elasticity layer that is laminated on both sides of the transparent material layer and having a surface hardness of greater than or equal to a pencil hardness of about 6H is provided.