Foldable Display Plate: Isotropic–Anisotropic Layering for Gap-Free Folding
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Solution Overview
Problem
Existing foldable display devices face issues with gaps and damage when folded due to inconsistent bending directions, leading to dust penetration and structural weakness.
Innovation Solution
A multilayered plate structure with isotropic and anisotropic elasticity coefficients, comprising carbon fiber reinforced plastic and glass fiber reinforced plastic layers, allows for differential bending directions in the folding and peripheral areas, eliminating the need for grooves and maintaining rigidity while enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform plate structure is used in foldable display devices, then manufacturing is simple, but gaps and damage occur when folded due to inconsistent bending directions
Solution Approach 1:
The plate is divided into multiple layers with different elasticity coefficients. The first layer has an isotropic elasticity coefficient while the second layer has an anisotropic elasticity coefficient, allowing each layer to respond differently to bending forces and enabling seamless folding without gaps
Solution Approach 2:
The plate uses a composite structure combining materials with different elasticity properties. The first layer may include glass fiber reinforced plastic with isotropic properties, while the second layer includes carbon fiber reinforced plastic with anisotropic properties, creating a composite that achieves both manufacturability and folding reliability
2Ease of operation
If grooves are added to enable bending, then folding is possible, but structural strength is reduced
Solution Approach 1:
Instead of changing the geometric structure by adding grooves, the invention changes the material parameters by using layers with different elasticity coefficients. This allows the plate to bend seamlessly without structural compromises while maintaining full structural strength
3Stress or pressure
If metal materials are used for the plate, then rigidity is maintained, but digitizer recognition rates decrease and bending becomes difficult
Solution Approach 1:
The invention replaces metal with composite plastic materials that combine rigidity with flexibility. The glass fiber and carbon fiber reinforced plastics provide structural support while allowing bending and maintaining digitizer recognition rates
Solution Approach 2:
The plate exhibits different mechanical properties in different directions due to the anisotropic layer. The material is designed to be rigid in directions where structural support is needed while being flexible in directions where bending is required
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 enables seamless folding without gaps, improves durability, and maintains digitizer recognition rates by using reinforced plastics instead of metals, ensuring easy bending and structural integrity.
Implementation Method 1
The plate is multi-layered, and includes: a layer with an isotropic elasticity coefficient; and a layer with an anisotropic elasticity coefficient
Implementation Method 2
a layer with an anisotropic elasticity coefficient. The layer with the anisotropic elasticity coefficient of the plate may include carbon fiber reinforced plastic, the carbon fiber reinforced plastic including carbon fibers extending in one direction
Data Source
AI summary
A display device includes: a display module; a plate attached to the display module; and a digitizer on a lower portion of the plate. The plate is multi-layered, and includes: a layer with an isotropic elasticity coefficient; and a layer with an anisotropic elasticity coefficient.