Flexible Display Module Graphene Cover Layer Bending Creases
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display modules face issues such as die printing, creases, and peeling between film layers during bending, leading to reduced durability and user experience, along with static electricity accumulation causing gray scale deviations.
Innovation Solution
A flexible display module design featuring a bending region with a graphene-covered cover layer and a support layer with a hollowed rigid material layer, which improves mechanical strength, reduces film layer thickness, and allows for better bending performance, while a carbonized region aids in static electricity conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional film layer structures are used in flexible display modules, then the module can be bent, but die printing and creases occur and peeling between film layers happens during bending
Solution Approach 1:
The patent replaces traditional rigid glass substrates with flexible substrates including polymer substrates and metal foil substrates, enabling the display module to be bent without causing die printing, creases, or peeling between film layers. The flexible substrate maintains structural integrity while allowing repeated bending operations.
Solution Approach 2:
The patent employs composite material structures combining flexible substrates with various functional layers (OLED layers, encapsulation layers, touch sensor layers) to create a integrated flexible display module that maintains both flexibility and structural stability during bending.
2Strength
If thick film layers are used to ensure structural strength, then the module has better mechanical strength, but bending performance deteriorates
Solution Approach 1:
The patent utilizes thin flexible substrates (polymer substrates or metal foil substrates) that provide sufficient mechanical strength while maintaining excellent bending performance, eliminating the need for thick rigid layers that would hinder flexibility.
Solution Approach 2:
The patent changes the material parameters from rigid glass to flexible materials with appropriate thickness, achieving the optimal balance between mechanical strength and bending performance by selecting materials with suitable elastic modulus and thickness parameters.
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 bending performance, prevents creases and peeling, and effectively releases static electricity, improving the module's durability and user experience by utilizing graphene's mechanical and electrical properties.
Implementation Method 1
the cover layer includes a first flexible film material and a first graphene layer provided on a surface of the first flexible film material facing away from the flexible display substrate
Implementation Method 2
the rigid material layer includes a hollowed region and non-hollowed regions located on two sides of the hollowed region, in a direction perpendicular to the first direction, a width of the hollowed region is larger than a width of the bending region
Implementation Method 3
a carbonized region aids in static electricity conduction
Data Source
AI summary
A flexible display module includes a flexible display substrate, a cover layer provided on a display side of the flexible display substrate, and a support layer on a side of the flexible display substrate facing away from the display side; the cover layer includes a first flexible film material and a first graphene layer on a surface of the first flexible film material facing away from the flexible display substrate; the support layer includes a rigid material layer and a first flexible material layer, the rigid material layer includes a hollowed region and non-hollowed regions located on two sides of the hollowed region, a width of the hollowed region is larger than a width of the bending region of the flexible display module, the first flexible material layer is provided on a surface of the rigid material layer facing the flexible display substrate and is filled in the hollowed region.