Multilayer Cushion Pad for Flexible Display Foreign Matter Protection
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Solution Overview
Problem
Flexible display devices face issues with deformation and visibility of foreign matter when it is introduced between the display panel and the case, leading to potential damage and compromised moisture-proofing capabilities.
Innovation Solution
A cushion pad with a metal layer, a hard material layer, and an elastic layer is used, where the metal layer has a low Mohs hardness, the hard material layer has a high Mohs hardness, and the elastic layer has a lower hardness than both, with an adhesive layer for bonding, to absorb and collect foreign matter without deforming the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-material cushion pad is used, then the structure is simple, but it cannot effectively collect and absorb foreign matter of different types
Solution Approach 1:
The cushion pad is divided into multiple functional layers: a soft layer for absorbing liquid foreign matter, a hard layer for collecting solid foreign matter, and a metal layer providing structural support. This segmentation allows each layer to specialize in handling specific types of foreign matter, improving overall protection effectiveness.
Solution Approach 2:
The cushion pad uses composite material construction combining soft material, hard material, and metal layer. This composite structure enables the cushion pad to simultaneously handle different types of foreign matter (liquid and solid) while maintaining structural integrity, resolving the limitation of single-material designs.
2Strength
If the cushion pad is made soft to absorb impact, then impact absorption is improved, but the cushion pad cannot effectively collect solid foreign matter
Solution Approach 1:
The cushion pad separates impact absorption and solid foreign matter collection into different layers: the soft layer handles impact absorption while the hard layer specifically collects solid foreign matter. This functional segmentation resolves the contradiction between softness for impact absorption and hardness for solid matter collection.
Solution Approach 2:
The composite structure combines soft material for impact absorption with hard material for solid foreign matter collection. This allows the cushion pad to simultaneously provide impact protection and effectively collect solid particles that would otherwise damage the display panel.
3Object-affected harmful factors
If the cushion pad is made hard to collect foreign matter, then foreign matter collection is improved, but the cushion pad cannot absorb impact effectively
Solution Approach 1:
The cushion pad divides foreign matter collection and impact absorption into separate layers: the hard layer collects foreign matter while the soft layer absorbs impact. This segmentation allows each layer to optimize for its specific function without compromising the other.
Solution Approach 2:
The composite material structure combines hard material for foreign matter collection with soft material for impact absorption. This composite design enables the cushion pad to simultaneously achieve effective foreign matter collection and impact absorption, resolving the contradiction between hardness and softness.
4Reliability
If a thick cushion pad is used to protect the display panel, then protection is improved, but the device thickness increases
Solution Approach 1:
The cushion pad uses thin functional layers for each protection function: a thin soft layer for impact absorption, a thin hard layer for foreign matter collection, and a thin metal layer for structural support. This segmentation achieves comprehensive protection with minimal thickness by optimizing each layer's thickness for its specific function.
Solution Approach 2:
The composite material structure provides high protection effectiveness within a thin overall thickness by combining materials with different density and functional properties. The metal layer provides structural integrity while the soft and hard layers provide specialized protection, achieving protection without excessive thickness.
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 cushion pad effectively prevents deformation of the flexible substrate and reduces the visibility of foreign matter from the display panel, maintaining the integrity and moisture-proofing of the device.
Implementation Method 1
an elastic layer on the hard material layer... The elastic layer may have a hardness lower than a hardness of the display panel... The elastic layer may have a hardness lower than the hardness of the hard material layer
Data Source
AI summary
A display device includes a case having an accommodating space, a cushion pad on one surface of the accommodating space of the case, and a display panel on the cushion pad. The cushion pad includes a metal layer, a hard material layer on the metal layer, and an elastic layer on the hard material layer. The hard material layer has a hardness greater than a hardness of the metal layer.