Carbonized Polymer Substrates for Flexible Display Heat Dissipation
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Solution Overview
Problem
Flexible display apparatuses face challenges in heat dissipation due to lower thermal conductivity of plastic substrates compared to glass, necessitating additional heat dissipation sheets, which complicates manufacturing and increases costs.
Innovation Solution
Incorporating carbonized or graphitized polymer substrates with inorganic barrier layers to enhance thermal conductivity and adhesion, allowing for improved heat dissipation without the need for additional heat dissipation sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plastic flexible substrate is used, then flexibility is achieved, but thermal conductivity is lower than glass substrates
Solution Approach 1:
The patent uses carbonized or graphitized polymer substrates that combine the flexibility of plastic materials with the high thermal conductivity of carbon structures. The carbonized polymer creates a composite material that maintains the flexible nature of the original polymer while introducing carbon's superior heat dissipation properties, thereby resolving the contradiction between flexibility and thermal conductivity.
Solution Approach 2:
The patent changes the chemical and physical parameters of the polymer substrate through carbonization or graphitization processes. By transforming the polymer structure at the molecular level, the substrate's thermal conductivity parameter is significantly improved while retaining its flexibility, thus resolving the thermal conductivity limitation of conventional plastic substrates.
2Temperature
If an additional heat dissipation sheet is attached to improve heat dissipation, then thermal conductivity is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The carbonized or graphitized polymer substrate serves multiple functions simultaneously: it maintains the flexibility required for flexible displays, provides the structural base for the display device, and acts as an integrated heat dissipation layer. This multi-functionality eliminates the need for separate heat dissipation sheets, reducing device complexity while maintaining effective heat dissipation.
Solution Approach 2:
The patent merges the substrate function and heat dissipation function into a single integrated component. By incorporating heat dissipation capabilities directly into the flexible substrate through carbonization, the design eliminates the need for additional heat dissipation sheets, thereby simplifying the overall device structure and reducing manufacturing complexity.
3Temperature
If carbonized or graphitized polymer substrates are used, then thermal conductivity is enhanced, but manufacturing process complexity increases
Solution Approach 1:
The carbonization or graphitization of the polymer substrate is performed during the initial substrate preparation stage, before other display components are assembled. This preliminary action integrates the heat dissipation property enhancement into the existing manufacturing workflow, minimizing additional process steps and reducing overall manufacturing complexity despite the advanced material treatment 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
Enhances thermal conductivity, simplifies manufacturing, reduces costs, and improves adhesion between substrates, enabling efficient heat management in flexible displays.
Implementation Method 1
a thermal conductivity of the flexible substrate formed of a material such as a plastic is lower than that of a glass substrate
Implementation Method 2
Incorporating carbonized or graphitized polymer substrates with inorganic barrier layers to enhance thermal conductivity and adhesion
Data Source
AI summary
A flexible display apparatus includes: a first flexible substrate including carbon and having an upper surface, a lower surface facing the upper surface, and a lateral surface coupling the upper surface to the lower surface; a first barrier layer on the first flexible substrate to cover the first flexible substrate; a second flexible substrate on the first barrier layer, the second flexible substrate including carbon and having an upper surface, a lower surface facing the upper surface, and a lateral surface coupling the upper surface to the lower surface; and an organic light emitting device on the second flexible substrate.