Rod-and-Binder Cushion Layer for Flexible Display Impact Resistance
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Solution Overview
Problem
Flexible display devices face a trade-off between flexibility and durability, as structures that enhance durability often compromise flexibility, and vice versa, leading to weakened impact resistance and potential damage from external impacts.
Innovation Solution
A display device design featuring a cushion layer with rod parts and a binder, where the rod parts have a higher elastic modulus than the filling part, and are arranged to absorb impacts while maintaining flexibility, including different densities and sizes for various portions to optimize both properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a structure allowing for flexibility is applied to the flexible display device, then flexibility is improved, but durability against impact is weakened
Solution Approach 1:
The cushion layer is segmented into multiple rod parts arranged in an array, where each rod part independently absorbs impact forces. This segmentation allows the structure to maintain flexibility while providing distributed impact resistance, as the individual rods can deform locally without compromising the entire structure's integrity
Solution Approach 2:
The cushion layer combines rod parts with a binder material to form a composite structure. The rod parts provide impact resistance through their higher elastic modulus, while the binder material maintains flexibility and holds the rods together. This composite approach resolves the contradiction by integrating materials with complementary properties
2Reliability
If a structure for improving durability is applied to the flexible display device, then durability against impact is improved, but flexibility is degraded
Solution Approach 1:
The rod parts are strategically positioned in specific regions where impact protection is most needed, such as areas with higher rod density or larger rod dimensions. This local quality approach provides enhanced durability in critical zones while maintaining flexibility in other areas, avoiding the need for a uniformly rigid structure that would compromise overall flexibility
Solution Approach 2:
The elastic modulus of the rod parts is specifically engineered to be higher than the binder material, creating a gradient in mechanical properties. This parameter change allows the rod parts to resist impact forces effectively while the softer binder material maintains flexibility, resolving the contradiction between durability and flexibility
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 solution enhances both the impact resistance and flexibility of the display device, reducing the likelihood of damage from external impacts and improving overall durability and usability.
Implementation Method 1
each of the rod parts has a first elastic modulus, the filling part has a second elastic modulus, and the first elastic modulus is greater than the second elastic modulus
Data Source
AI summary
A display device includes a window, a display panel disposed below the window, and a cushion layer disposed below the display panel. The cushion layer includes a plurality of rod parts extending in a thickness direction of the cushion layer and a binder part coupled to the plurality of rod parts.