Flexible Display Assembly with Bonded Supports for Curl Stress Control
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Solution Overview
Problem
OLED flexible display assemblies experience increased curl stress and functional failure due to reduced curl radius and increased curl degree of freedom, leading to potential peeling and cracking of the film layers.
Innovation Solution
A flexible display assembly design with a support member, flexible display panel, and cover layer group, where the ends of the support member and cover layer group are bonded, transferring tension to a bonding portion to prevent peeling and cracking, and incorporating a reel system for stress management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the curl radius of OLED flexible display assembly is reduced and curl degree of freedom is increased, then the flexibility and configurability of the display assembly is improved, but the curl stress of the flexible display assembly increases leading to functional failure
Solution Approach 1:
The support member is segmented into a first support member and a second support member that are disposed at opposite sides of the flexible display panel. This segmentation allows each support member to independently manage stress in its respective region, preventing stress concentration that would occur in a single continuous support structure, thereby reducing overall curl stress while maintaining flexibility.
Solution Approach 2:
The first support member and second support member are positioned at opposite sides of the flexible display panel, providing localized support where needed. This local quality approach ensures that stress is distributed to specific regions rather than concentrated throughout the entire structure, allowing the display to achieve high curl degree of freedom without compromising strength.
2Stability of the object's composition
If the width of the flexible display panel is reduced relative to the support member and cover layer group, then the stress concentration at the edges is reduced, but the bonding portion must be precisely positioned to maintain structural integrity
Solution Approach 1:
The bonding portion acts as an intermediary element that connects the first support member and the first cover layer group. It is disposed between these two components and bonded to both, creating a stable triangular structure that prevents peeling. This intermediary bonding portion distributes stress evenly across the connection point, maintaining structural integrity while allowing for precise positioning during manufacturing.
3Strength
If the support member extends beyond the flexible display panel edges, then the stress distribution is improved and peeling is prevented, but the overall device complexity increases
Solution Approach 1:
The first support member and second support member are positioned asymmetrically at opposite sides of the flexible display panel, with each extending beyond the panel edges. This asymmetric configuration allows the support members to effectively anchor the cover layer group and prevent peeling at the edges, while the symmetry of having two opposing support members balances the overall structure, preventing excessive complexity.
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 effectively reduces curl stress, prevents peeling and cracking of the film layers, and maintains the flexible display's functionality by distributing stress through the bonding portion and reel system.
Implementation Method 1
a bonding portion bonded between the first end of the support member and the first end of the cover layer group
Implementation Method 2
bonding a side of a first end, away from the flexible display panel, of the support member to the reel
Data Source
AI summary
A flexible display assembly, a flexible display device and a method for preparing the flexible display device are provided. The flexible display assembly includes a flexible display panel on a side of a support member, a width of the flexible display panel being less than a width of the support member; a cover layer group on a side, away from the support member, of the flexible display panel, the width of the flexible display panel being less than a width of the cover layer group, the cover layer group, the flexible display panel and the first end of the support member forming a structure with two protruding sides and a depressed middle; and a bonding portion bonded between the first end of the support member and the first end of the cover layer group.