Thermal Insulation Layer for Display Devices in High Temperature Environments
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Solution Overview
Problem
Display devices with existing heat dissipating layers fail to function properly in high temperature environments, leading to degradation of light-emitting elements, particularly in in-vehicle applications.
Innovation Solution
A display device incorporating a thermal insulation layer with a molybdenum-containing complex and a polyphenylene sulfide-based resin is provided to thermally insulate light-emitting elements from external heat, preventing degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipating layer is provided on the support substrate, then heat dissipation is improved, but the light-emitting elements still degrade in high temperature environments
Solution Approach 1:
Instead of trying to dissipate heat away from the light-emitting elements, the invention inverts the approach by providing thermal insulation to block external heat from reaching the elements. The thermal insulation layer is positioned between the light-emitting elements and the support substrate to prevent heat conduction from the substrate to the elements, thereby protecting them from high temperature environments.
Solution Approach 2:
The invention uses a composite material approach by combining a base resin with specific inorganic particles (having a mean particle diameter of 0.1 μm to 10 μm) to create a thermal insulation layer with optimized thermal properties. The composite structure of resin matrix and dispersed inorganic particles provides both mechanical integrity and thermal insulation functionality.
2Reliability
If thermal insulation is provided to protect light-emitting elements, then element durability is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The invention applies local quality by providing thermal insulation specifically in the region where light-emitting elements are located, rather than uniformly throughout the entire support substrate. The thermal insulation layer is positioned locally between the elements and the substrate, insulating only the sensitive elements while allowing other regions to maintain normal heat dissipation pathways.
3Temperature
If inorganic particles with small diameter are used in thermal insulation layer, then insulation performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The invention optimizes the particle size parameter by specifying a mean particle diameter range of 0.1 μm to 10 μm for the inorganic particles. This parameter range balances thermal insulation performance with manufacturability - particles are small enough to provide good insulation but large enough to be easily handled and dispersed during manufacturing processes, avoiding excessive precision requirements.
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 effectively retards the degradation of light-emitting elements, maintaining brightness and display characteristics even in high temperature environments, such as those found in in-vehicle applications.
Implementation Method 1
at least one thermal insulation layer configured to thermally insulate the plurality of light-emitting elements from external heat
Data Source
AI summary
The display device includes a light-emitting element layer provided with a plurality of light-emitting elements, and a TFT layer that is provided below the light-emitting element layer and includes TFT configured to drive the plurality of light-emitting elements. Further, at least one thermal insulation layer configured to thermally insulate the plurality of light-emitting elements from external heat is provided, and the thermal insulation layer includes a molybdenum-containing complex and a polyphenylene sulfide-based resin.