Carbonized Polymer Flexible Substrate Thermal Management
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Solution Overview
Problem
Flexible display apparatuses using plastic substrates face challenges with heat dissipation, requiring additional heat dissipating sheets that compromise flexibility and increase costs, while glass substrates offer better thermal resistance but are rigid and difficult to handle.
Innovation Solution
A flexible display apparatus is designed with a first flexible substrate containing carbon, a metal layer between substrates, and a barrier layer, which includes a metal oxide layer for enhanced thermal resistance and flexibility, eliminating the need for a heat dissipating sheet and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If plastic substrates are used for flexible display apparatuses, then flexibility is maintained, but thermal resistance is insufficient requiring additional heat dissipating sheets
Solution Approach 1:
The patent combines the heat dissipation function and moisture barrier function into the substrate itself by incorporating carbonized polymer layers and metal layers directly into the flexible substrate structure, eliminating the need for separate heat dissipating sheets and simplifying the overall device structure
Solution Approach 2:
The flexible substrate is constructed as a composite material system including carbonized polymer layers (providing thermal resistance and flexibility) and metal layers (providing heat dissipation and barrier functions), which simultaneously addresses thermal management requirements while maintaining structural simplicity
2Temperature
If glass substrates are used, then thermal resistance is improved, but flexibility is lost and handling becomes difficult
Solution Approach 1:
The patent changes the physical and chemical parameters of the polymer substrate through carbonization treatment, transforming it from a conventional plastic material with poor thermal resistance to a carbon-rich material that exhibits both high thermal resistance and maintained flexibility, thereby resolving the trade-off between thermal performance and mechanical properties
3Temperature
If additional heat dissipating sheets are added to plastic substrates, then thermal resistance is improved, but flexibility is compromised and costs increase
Solution Approach 1:
The heat dissipation function is merged into the substrate structure itself through the incorporation of metal layers and carbonized polymer layers, eliminating the need for separate heat dissipating sheets and thereby preserving flexibility while reducing structural complexity
Solution Approach 2:
The flexible substrate structure itself provides the heat dissipation function through its integrated metal and carbonized polymer layers, making the substrate self-sufficient for thermal management without requiring external heat dissipating 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 solution provides improved flexibility and thermal resistance, reducing manufacturing complexity and costs by leveraging carbonized polymer substrates with integrated metal layers for heat dissipation and moisture barrier functions.
Implementation Method 1
forming a first flexible substrate by forming a first polymer layer on a supporting layer and carbonizing or graphitizing the first polymer layer
Implementation Method 2
forming a first flexible substrate by forming a first polymer layer on a supporting layer and carbonizing or graphitizing the first polymer layer
Implementation Method 3
forming a metal oxide layer after forming the metal layer and before forming the second flexible substrate. Forming the metal oxide layer may include oxidizing a surface of the metal layer
Data Source
AI summary
A flexible display apparatus includes a first flexible substrate including carbon, a second flexible substrate on the first flexible substrate, a metal layer between the first flexible substrate and the second flexible substrate, a barrier layer on the second flexible substrate, a thin film transistor (TFT) on the barrier layer, and an organic light-emitting device (OLED) electrically connected to the TFT.