Flexible Display Rigid-Elastic Support Substrate for Bend Durability
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Solution Overview
Problem
Flexible display devices face challenges such as damage to electrical components and laminate separation or cracking due to bending or folding, particularly with multiple cycles, necessitating improved durability and stress management.
Innovation Solution
A flexible display device design featuring a support substrate with alternating rigid and elastic portions, where the rigid portions have curved surfaces with protrusions and recesses, dispersing load and reinforcing rigidity to prevent cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is made flexible to enable bending and folding, then space usability and design flexibility are improved, but durability and resistance to damage from bending cycles deteriorate
Solution Approach 1:
The support substrate is segmented into alternating rigid portions and elastic portions. The rigid portions provide structural support and maintain display quality, while the elastic portions allow bending and folding without damage. This segmentation enables the display to be flexible yet durable through repeated bending cycles.
Solution Approach 2:
Different regions of the support substrate have different mechanical properties: rigid portions in areas requiring structural stability and elastic portions in areas requiring flexibility. The curved surfaces with protrusions and recesses create localized variations in rigidity and elasticity, allowing the display to bend without compromising overall structural integrity.
2Stability of the object's composition
If the support substrate uses only rigid material to maintain display quality, then structural stability is improved, but flexibility and ability to bend without damage deteriorate
Solution Approach 1:
The support substrate is divided into rigid portions for structural stability and elastic portions for flexibility. This segmentation allows the display to maintain structural integrity in rigid areas while achieving flexibility in elastic areas, resolving the contradiction between stability and adaptability.
Solution Approach 2:
The support substrate uses a composite structure combining rigid and elastic materials in alternating portions. This composite approach allows the display to exhibit both structural stability from rigid portions and flexibility from elastic portions, enabling bending without compromising structural integrity.
3Ease of operation
If the display panel is made thinner and lighter for portability, then ease of operation is improved, but resistance to impact and foreign matters deteriorates
Solution Approach 1:
The support substrate incorporates rigid portions with curved surfaces that provide localized impact resistance where needed, while maintaining overall thinness and lightness. The alternating rigid and elastic portions create a structure that is lightweight yet resistant to impacts and foreign matters at critical locations.
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 design enhances durability by efficiently dispersing load and maintaining rigidity, allowing the display device to be bent or stretched without damage, thus improving flexibility and longevity.
Implementation Method 1
an elastic portion disposed to fill between the plurality of rigid portions
Implementation Method 2
both side surfaces of each of the plurality of rigid portions include a curved portion having a plurality of protrusions repeated in the first direction and at least one recess
Data Source
AI summary
A flexible display device includes a display panel configured to display images and a support substrate disposed under the display panel so as to support the display panel. The support substrate includes a plurality of rigid portions extending in a first direction and spaced apart from each other in a second direction perpendicular to the first direction and an elastic portion disposed to fill between the plurality of rigid portions. On a plane defined in the first direction and the second direction, both side surfaces of each of the plurality of rigid portions include a curved portion having a plurality of protrusions repeated in the first direction and at least one recess.