Foldable Display Shielding Member Impurity Protection
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Solution Overview
Problem
Foldable display devices face reliability issues due to impurities entering the panel part from the hinge area, leading to potential damage and functional deterioration when folded or unfolded.
Innovation Solution
A display module with a shielding member made of durable materials, such as woven fabric or polymeric films, and a stretchable member with high elongation, which covers the boundary area between supporting members to block impurities and absorb tensile forces, preventing damage and deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shielding member is added to block impurities, then reliability is improved, but device complexity increases
Solution Approach 1:
The protective structure is divided into two functional segments: a shielding member for blocking impurities and an impact-absorbing member for cushioning mechanical shocks. This segmentation allows each component to specialize in its specific protective function, improving overall reliability without requiring a single complex structure to handle all protection needs.
Solution Approach 2:
The shielding member is constructed from composite materials including at least one of a woven fabric and a non-woven fabric, combining different material properties to achieve both impurity blocking and flexibility. This composite approach enhances protective capability while maintaining manageable structural complexity.
2Reliability
If a stretchable member with high elongation is used to absorb tensile forces, then reliability is improved, but device complexity increases
Solution Approach 1:
The stretchable member is designed with high elongation capability to dynamically adapt to tensile forces generated during folding and unfolding operations. This dynamic property allows the member to absorb variable mechanical stresses without requiring complex active control mechanisms, thereby improving reliability while keeping the structure relatively simple.
Solution Approach 2:
The stretchable member's material parameters are specifically selected to provide high elongation, transforming the mechanical response characteristics of the supporting structure. By changing the material parameter (elongation capability) rather than adding complex mechanical components, the system achieves improved reliability through passive material properties.
3Reliability
If multiple supporting members are used to support the panel part, then reliability is improved, but device complexity increases
Solution Approach 1:
The supporting structure is segmented into multiple supporting members (first supporting member, second supporting member, and third supporting member) that can be independently optimized and positioned. Each supporting member can be tailored to specific load requirements at different locations, improving overall reliability while allowing modular assembly that manages complexity.
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 effectively blocks impurities and reduces abrasion, ensuring the reliability and longevity of the display module by allowing the shielding member to slide and absorb forces during folding and unfolding, thus protecting the panel part.
Implementation Method 1
a stretchable member (320) extended to the shielding member (310). An elongation of the stretchable member (320) may be greater than an elongation of the shielding member (310)
Data Source
AI summary
A display module includes a panel part, a first supporting member, a second supporting member, a shielding member, and a stretchable member. The panel part includes a pixel array to display an image. The first supporting member is disposed under the panel part. The second supporting member is disposed under the panel part and adjacent to the first supporting member in a first direction. The shielding member covers a boundary area between the first supporting member and the second supporting member. The stretchable member is extended to the shielding member and disposed under the first supporting member or the second supporting member. An elongation of the stretchable member is greater than an elongation of the shielding member.