Flexible Display Decoupling Layer for Stress Management
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Solution Overview
Problem
Flexible display devices face performance degradation due to misalignment and stress-induced damage when bent and unfolded, as the stress buffer layer may not restore the original positional relationship between components, leading to unintended misalignment and reduced product reliability.
Innovation Solution
Incorporating a decoupling layer between submodules of a flexible module, which allows for sliding stresses and maintains neutral planes in each submodule, reducing strain and improving flexibility and operability by distributing stress evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a stress buffer layer is formed to prevent breaking and peeling when bent, then member strength and bonding reliability are improved, but the relative positional relationship between members cannot return to its original state when returning from bent to flat state, causing misalignment
Solution Approach 1:
The stress buffer layer is divided into multiple regions with different thicknesses (first region with greater thickness, second region with lesser thickness). This segmentation allows different parts of the layer to perform different functions: the thicker first region provides stress buffering to prevent breaking and peeling, while the thinner second region minimizes deformation to maintain positional alignment between members.
2Ease of operation
If the flexible module is made more flexible to allow bending, then ease of operation is improved, but strain and stress on components increase, leading to breaking and peeling
Solution Approach 1:
The stress buffer layer is positioned between members beforehand to cushion and absorb stress before it reaches critical levels. By pre-positioning this protective layer with optimized thickness distribution, the module can be bent more flexibly while the stress buffer layer prevents stress-induced breaking and peeling of components.
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 decoupling layer effectively reduces strain and stress on components, preventing damage and misalignment, thus enhancing the display device's flexibility and reliability by allowing smooth bending operations while maintaining positional accuracy.
Implementation Method 1
a first decoupling layer DCP1 located between the first submodule SM1 and the second submodule SM2
Data Source
AI summary
According to one embodiment, a display device includes a first submodule having a display panel, a second submodule having a cover member located on the display panel, and a first decoupling layer located between the first submodule and the second submodule, and each of the first submodule and the second submodule has a single neutral plane.