Graphite Heat-Dissipating Layer for White-Blur-Resistant Displays
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Solution Overview
Problem
Display devices in multimedia electronic apparatuses generate significant heat, leading to reduced lifespan and malfunction due to inadequate heat dissipation, and are prone to white blur defects on adhesive layers.
Innovation Solution
Incorporating a heat dissipating member with a graphite heat dissipating plate and an adhesive layer containing polycarbonate polyol, where the polyol content gradually increases from the plate to a base material film, enhancing heat dissipation and reducing white blur by varying adhesive layer composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipating member is added to improve heat dissipation, then heat dissipation function is improved, but device complexity increases
Solution Approach 1:
The adhesive layer is designed to perform dual functions: both bonding the heat dissipating plate to the base material film and dissipating heat through its thermally conductive composition. By merging the heat dissipation function into the adhesive layer, the patent reduces the need for separate heat dissipation structures, thereby improving heat dissipation while minimizing increases in device complexity.
Solution Approach 2:
The adhesive layer is formulated as a multi-functional component that simultaneously provides mechanical bonding and thermal management. The adhesive composition includes thermally conductive fillers that enable it to serve as both an adhesive and a heat dissipation pathway, allowing one component to fulfill multiple roles in the device architecture.
2Ease of manufacture
If adhesive layer composition is made uniform, then manufacturing is easier, but white blur defects occur due to heat exposure
Solution Approach 1:
The adhesive layer is designed with spatially varying composition to address local thermal conditions. The adhesive composition includes thermally conductive fillers distributed throughout the layer, creating regions with enhanced thermal conductivity adjacent to the heat dissipating plate. This local variation in composition allows the adhesive to resist heat-induced degradation at critical interfaces while maintaining overall structural integrity.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the adhesive layer by incorporating thermally conductive fillers and adjusting the adhesive composition. These parameter changes enhance the adhesive's thermal resistance properties, allowing it to maintain bonding strength and optical clarity under heat exposure from the display device.
3Reliability
If polycarbonate polyol content is increased throughout the adhesive layer, then white blur resistance improves, but adhesion strength may decrease
Solution Approach 1:
The adhesive layer is designed with spatially varying polycarbonate polyol content to address different functional requirements at different locations. Regions adjacent to the heat dissipating plate contain higher polycarbonate polyol concentrations to resist heat-induced white blur, while other regions maintain adhesive composition optimized for bonding strength. This local differentiation allows simultaneous achievement of heat resistance and adhesion performance.
Solution Approach 2:
The adhesive layer is formulated as a composite material system combining polycarbonate polyol with other adhesive components and thermally conductive fillers. This composite approach allows the adhesive to exhibit both high heat resistance (from polycarbonate polyol) and strong adhesion properties (from the composite formulation), resolving the trade-off between these two competing 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 dissipates heat and minimizes white blur defects, improving the reliability and display characteristics of display devices.
Implementation Method 1
a heat dissipating member with a graphite heat dissipating plate
Implementation Method 2
the adhesive layer includes a polyol, and the polyol includes a polycarbonate polyol... enhancing heat dissipation and reducing white blur by varying adhesive layer composition
Data Source
AI summary
A display device, an electronic device including the display device, and a method for manufacturing the display device are disclosed. The display device may include a display panel, a heat dissipating member below the display panel, and a bottom chassis below the heat dissipating member. The heat dissipating member may include a heat dissipating plate including graphite, an adhesive layer on at least one surface of the heat dissipating plate, wherein the adhesive layer may include a polyurethane, and a base material film spaced and/or apart (e.g., spaced apart or separated) from the heat dissipating plate with the adhesive layer therebetween. The adhesive layer may include a polyol that includes a polycarbonate polyol. The adhesive layer may include a first portion adjacent to the heat dissipating plate and a second portion adjacent to the base material film.