Layered CFRP Support Member for Thin Foldable Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving a balance between high strength, high heat dissipation, and thin thickness, particularly in flexible and foldable designs, which are not adequately addressed by current materials.
Innovation Solution
A support member composed of a layered structure of carbon fiber reinforced plastics, including PAN-based carbon fibers in the first and second plates and pitch-based carbon fibers in the third plate, with specific fiber area weights and resin contents, providing enhanced strength and heat dissipation characteristics while maintaining a reduced thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single-layer carbon fiber reinforced plastic is used, then the manufacturing process is simple, but the strength and heat dissipation characteristics are insufficient
Solution Approach 1:
The support member uses a multi-layer composite structure combining different types of carbon fiber reinforced plastics (PAN-based and pitch-based) with specific resin contents to achieve both high strength and heat dissipation characteristics that single-layer materials cannot provide
Solution Approach 2:
The support member is divided into multiple layers with different material compositions - first and second plates made of PAN-based carbon fiber reinforced plastic and a third plate made of pitch-based carbon fiber reinforced plastic, where each layer contributes different properties to the overall structure
2Strength
If the thickness of the support member is increased, then the strength and heat dissipation are improved, but the device becomes bulkier and less portable
Solution Approach 1:
The use of high-performance carbon fiber reinforced plastics with optimized fiber area weights (15-30 g/m2 for outer plates, 50-150 g/m2 for inner plate) and resin contents (30-50 wt% for first resin, 20-40 wt% for second resin) enables achieving high strength and heat dissipation in a thin configuration
Solution Approach 2:
The patent optimizes specific parameters including fiber area weight, resin content, and layer thickness to achieve the desired strength and heat dissipation characteristics while maintaining a thin overall thickness, balancing performance requirements with portability
3Stability of the object's composition
If pitch-based carbon fiber is used in the third plate, then the heat dissipation characteristic is improved, but the manufacturing complexity increases
Solution Approach 1:
The third plate specifically uses pitch-based carbon fiber reinforced plastic with 20-40 wt% second resin content to provide enhanced heat dissipation characteristics in the inner layer, while the outer plates use PAN-based carbon fiber reinforced plastic for structural integrity and surface quality
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 achieves a support member with improved strength, bending stiffness, and thermal conductivity, enabling a thinner and more efficient display device that can be conveniently folded and carried, with reduced magnetic interference and enhanced surface quality.
Implementation Method 1
a horizontal thermal conductivity of the support member may be 50 to 110 W/m·K
Data Source
AI summary
A support member and a display device including the same are disclosed. A support member includes: a first plate, a second plate on the first plate, and a third plate between the first plate and the second plate. The first plate and the second plate include a first carbon fiber reinforced plastic, and the third plate includes a second carbon fiber reinforced plastic different from the first carbon fiber reinforced plastic.