Display Device Impact Relieving Member Design
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Solution Overview
Problem
Display devices are prone to defects from external impacts due to inadequate protection mechanisms, which can lead to reliability issues during stress testing.
Innovation Solution
A display device design featuring a first protection member with a flat part and a support part, a second protection member spaced from the flat part to create an inner space, and an impact relieving member, which includes acryl-based or polyurethane-based polymers, to absorb and distribute external impacts effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a display device is designed with basic protection structures, then manufacturing complexity is reduced, but the device becomes vulnerable to external impacts causing display panel defects
Solution Approach 1:
The protection structure is divided into multiple functional segments: a first protection member with flat and support parts, a second protection member, and an impact relieving member. Each segment performs a specific function in the impact mitigation sequence, creating a multi-layered defense system that enhances reliability without excessive complexity.
Solution Approach 2:
The impact relieving member is positioned between the first and second protection members to provide beforehand cushioning. This member includes a void space that deforms under impact force, absorbing energy before it reaches the display panel. The cushioning effect is prepared in advance through the structural design of the void space and material selection.
2Length of stationary object
If protection members are positioned close together, then device thickness is reduced, but impact absorption capability is compromised
Solution Approach 1:
The impact relieving member introduces a vertical dimension of protection through its void space structure. Rather than simply increasing horizontal distance between protection members, the design utilizes the Z-axis (thickness direction) to create a deformable cushioning layer, effectively absorbing impact energy within the limited thickness constraint.
Solution Approach 2:
The distance between the first and second protection members is optimized to between 420 μm and 1000 μm, and the impact relieving member height is controlled between 50 μm and 500 μm. These parameter changes balance the competing requirements of thin profile and effective impact absorption, achieving both goals through precise dimensional control.
3Strength
If rigid protection structures are used, then structural strength is improved, but impact energy is not effectively absorbed
Solution Approach 1:
The impact relieving member functions as a flexible thin film structure with a void space that can deform under impact. This flexible component is positioned between rigid protection members, creating a hybrid structure where the rigid parts provide structural strength while the flexible intermediate layer absorbs impact energy through controlled deformation.
Solution Approach 2:
The protection structure combines materials with different mechanical properties: rigid materials for the first and second protection members to maintain structural strength, and a polymer-based material (acryl or polyurethane) for the impact relieving member to provide flexibility and energy absorption. This composite approach resolves the contradiction between strength and energy absorption.
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 design significantly reduces the likelihood of defects in the display module by absorbing external impacts, enhancing the device's durability and reliability against stress testing.
Implementation Method 1
an impact relieving member between the support part and the second protection member... to absorb and distribute external impacts effectively
Implementation Method 2
The impact relieving member may include an acryl-based polymer, and a polyurethane-based polymer
Data Source
AI summary
Provided is a display device including a first protection member including a flat part, in which a central area and a surrounding area that is adjacent the central area are defined, and a support part on the surrounding area of the flat part, and protruding upward from the flat part, a display module on the first protection member for displaying an image, and a second protection member between the first protection member and the display module, on the support part, and spaced a distance from the flat part to define a space on the central area.