Flexible Display Support Layer Impact Resistance
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Solution Overview
Problem
Flexible display devices face challenges in maintaining impact resistance, particularly in the folding area, due to the need for a balance between flexibility and structural integrity.
Innovation Solution
The display device incorporates a support layer with high-modulus materials like polyethylene terephthalate, polyimide, or polycarbonate, combined with a cushion layer and adhesive members, to enhance impact resistance in the folding area by distributing forces and preventing sagging of the bending portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display device uses a folding structure to improve portability and convenience, then the adaptability and ease of operation are improved, but the impact resistance and structural integrity in the folding area deteriorate
Solution Approach 1:
The support layer is divided into multiple segments including a first support plate, a second support plate, and multiple support members arranged in a grid pattern. This segmentation allows the structure to maintain flexibility in the folding area while providing distributed support to improve impact resistance across the display device
Solution Approach 2:
Different regions of the support layer are designed with different properties: the first and second support plates provide rigid support in non-folding areas, while the support members in the folding area provide localized support with appropriate flexibility. The cushion layer is strategically positioned under the support plates to provide localized impact absorption where needed
2Reliability
If the support layer uses high-modulus materials to improve impact resistance, then the strength and reliability are improved, but the flexibility and ease of folding deteriorate
Solution Approach 1:
The support layer combines multiple materials with different properties: rigid materials (PET, PI, or PC) for the support plates and support members to provide impact resistance, and a cushioning material for the cushion layer to provide flexibility and shock absorption. This composite structure achieves both high impact resistance and folding flexibility
Solution Approach 2:
The support structure is designed to be dynamic rather than static: the cushion layer allows the support plates and support members to move and deform elastically during folding and impact events, enabling the rigid components to maintain their shape and provide support while the overall structure remains flexible
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
This configuration significantly improves the impact resistance of the display device, allowing it to absorb external impacts effectively, even in the folding area, thereby enhancing its durability and functionality.
Implementation Method 1
Each of the first support member and the second support member has a modulus greater than a modulus of each of the first cushion member and the second cushion member
Implementation Method 2
a cushion layer including a first cushion member under the first plate portion and a second cushion member under the second plate portion
Data Source
AI summary
A display device includes a display module including a folding area, a plate which is under the display module and includes a bending portion corresponding to the folding area and a plurality of openings defined in the bending portion, a first plate and a second plate portion extending from opposing sides of the bending portion, a support layer which is under the bending portion and includes a first support member and a second support member spaced apart from each other, and a cushion layer including a first cushion member corresponding to the first plate portion and a second cushion member corresponding to the second plate portion. Each of the first support member and the second support member has a modulus greater than a modulus of each of the first cushion member and the second cushion member.