Foldable Display Metal Plate Segmentation for Impact Resistance
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Solution Overview
Problem
Foldable display devices face challenges in maintaining impact resistance and flexibility due to the partial lines on the metal plate overlapping the bendable portion, which can lead to reduced durability and reliability when subjected to external shocks.
Innovation Solution
The design involves removing the partial line on the slit area of the metal plate overlapping the bendable portion, allowing the display device to have the same level of impact resistance as the non-bendable portions by optimizing the substrate structure with specific pixel circuits and connection lines, and using a metal plate with a grid pattern that includes bars and slits for flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal plate with continuous lines is used to provide structural support, then strength is improved, but reliability deteriorates when the device is folded or subjected to external shocks
Solution Approach 1:
The metal plate is divided into multiple bars separated by slits, creating a segmented structure. This segmentation allows the metal plate to flex during folding and absorb external shocks, preventing the continuous line from cracking while maintaining overall structural support through the distributed bar network.
Solution Approach 2:
The connection portion of the metal plate overlapping the bendable portion has a different structure (segmented with slits) compared to other portions. This local structural differentiation provides flexibility where needed while maintaining strength in non-bendable areas, resolving the contradiction between overall strength and local flexibility.
2Adaptability or versatility
If the metal plate is made flexible to allow folding, then adaptability is improved, but strength deteriorates due to the segmented structure
Solution Approach 1:
By segmenting the metal plate into bars with slits, the structure gains flexibility for folding while each individual bar maintains its strength. The segmented design allows controlled deformation during folding without compromising the overall load-bearing capability of the metal plate.
Solution Approach 2:
The metal plate structure transitions from a static continuous line to a dynamic segmented structure that can adapt its configuration during folding. The slits enable the bars to move relative to each other, providing the necessary flexibility for folding while maintaining structural integrity through the interconnected bar network.
Data Source
AI summary
A display device includes a substrate including a first non-bendable portion, a second non-bendable portion, and a bendable portion that is interposed between the first and the second non-bendable portions, a metal plate disposed on a rear face of the substrate and including a first plate portion overlapping the first non-bendable portion, a second plate portion overlapping the second non-bendable portion, and a connection portion between the first plate portion and the second plate portion, the connection portion including a first bar and a second bar that are separated by a slit; the substrate includes a first area in which the first bar and the bendable portion overlap each other, a second area in which the slit and the bendable portion overlap each other, and a third area in which the second bar and the bendable portion overlap each other. The second area is between the first and second areas.