Foldable Display Support Structure Weight Reduction
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Solution Overview
Problem
As mid-to-large foldable display devices increase in size, they also increase in weight, necessitating a structural solution to reduce weight while maintaining functionality and durability.
Innovation Solution
The display device incorporates a lightweight structure with a first and second support part, a cover layer, and auxiliary support parts made from materials like carbon fiber reinforced plastics (CFRP) or aluminum alloys, featuring grooves and cushion layers to distribute weight and enhance flexibility, with specific gravity optimization to minimize overall weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display device size increases, then the display area increases, but the weight increases
Solution Approach 1:
The support structure is divided into multiple components: first support part, second support part, third support part, and auxiliary support parts. This segmentation allows each component to be optimized independently for weight and strength, reducing overall device weight while maintaining structural integrity across large display areas
Solution Approach 2:
The patent employs composite materials with different specific gravities for different support components. The first support part uses a material with lower specific gravity than the second support part, allowing weight reduction in less critical areas while maintaining strength where needed, thus reducing overall device weight without compromising display area structural requirements
2Weight of stationary object
If the support structure is made lighter, then the device weight decreases, but the structural strength decreases
Solution Approach 1:
Different support parts use materials with different specific gravities based on their structural requirements. The second support part, which requires higher strength, uses a material with greater specific gravity, while the first support part uses a lighter material. This local optimization maintains structural strength where needed while reducing overall weight
Solution Approach 2:
Multiple auxiliary support parts are combined with the main support structure, and the third support part integrates multiple functions including supporting both non-folding parts and the folding part. This merging approach distributes structural loads efficiently, maintaining strength while minimizing the amount of material needed
3Adaptability or versatility
If the support structure is made more flexible for folding, then the foldability improves, but the structural stability decreases
Solution Approach 1:
The support structure is designed with dynamic characteristics that allow it to flex during folding operations while maintaining stability during normal operation. The combination of multiple support parts with different material properties enables the structure to adapt its rigidity based on operational state, providing both foldability and structural stability
Data Source
AI summary
A display device includes a display panel including a first non-folding part, a folding part, and a second non-folding part which are arranged in a first direction, a first support part disposed below the display panel, a groove is defined in a top surface of a portion of the first support part overlapping the folding part, and the first support part being foldable about the folding part, a second support part disposed in the groove, and a cover layer disposed in the groove and below the second support part.