Flexible Display Support Bars Reducing Bending Stress
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Solution Overview
Problem
Flexible display devices face challenges in maintaining structural integrity and reducing stress when bent, folded, or rolled, due to limitations in support mechanisms, which can lead to tearing and surface roughness issues.
Innovation Solution
A display device design featuring a lower substrate with strategically placed grooves and support bars that are bonded using a welding process, where the support bars' second portions overlap the grooves, enhancing adhesive force and reducing thickness variations, thereby improving the device's flexibility and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If support plates are used in flexible display devices, then structural support is provided, but the support plates are separated by pulling force when the device is slid, folded or bent
Solution Approach 1:
The support structure is divided into multiple support bars instead of using a single continuous support plate. These segmented support bars are spaced apart and allow relative movement between them, enabling the structure to accommodate bending and folding without breaking while still providing necessary support.
Solution Approach 2:
The support bars are positioned at specific locations where support is most needed, rather than using a continuous plate. The grooves are strategically placed to allow movement in specific areas while maintaining support in other areas, creating localized flexibility and support characteristics.
2Adaptability or versatility
If the lower substrate is made flexible to allow sliding and folding, then device flexibility is improved, but bending stress and surface roughness increase
Solution Approach 1:
The lower substrate is divided into multiple regions by grooves, creating a segmented structure that can bend and fold more easily. The grooves act as hinge points that concentrate the bending stress in specific locations, reducing the overall stress on the substrate and preventing surface roughness.
Solution Approach 2:
The lower substrate is designed as a thin, flexible structure with grooves that enable it to bend and fold without breaking. The grooves create flexible hinge regions that allow the substrate to adapt to different shapes while maintaining structural integrity.
3Strength
If support bars are bonded to the lower substrate, then structural support is enhanced, but thickness variations and surface roughness occur
Solution Approach 1:
The grooves are placed only in specific locations where support bars need to be bonded, rather than across the entire substrate. This localized groove placement allows for precise bonding at critical points while maintaining uniform thickness in other areas, reducing overall surface roughness.
Solution Approach 2:
The grooves act as intermediaries that facilitate the bonding process between support bars and the lower substrate. The grooves provide a controlled interface for adhesive application, ensuring strong bonding at specific locations without affecting the overall surface uniformity.
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 the display device's flexibility and durability by reducing bending stress and surface roughness, preventing tearing, and improving the quality of the device through improved bonding and structural support.
Implementation Method 1
support bars that are bonded using a welding process
Data Source
AI summary
A display device includes a display module, a lower substrate facing the display module and defining a plurality of openings in the lower substrate which are spaced apart from each other along a first direction, a plurality of support bars which are connected with the lower substrate and spaced apart from each other along the first direction, each of the plurality of support bars including a first portion extending in a second direction intersecting the first direction and including opposing ends in the second direction, and a plurality of second portions respectively extending from the opposing ends of the first portion, in a direction away from the lower substrate; and a housing from which and into which the display module is respectively extendible and retractable, along the first direction.