Media-Streaming Thermal Layout With Graphite Heat Spreading
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thermal-control systems in media-streaming devices face issues with heat dissipation, leading to uneven heat distribution, hot spots, and potential damage to components due to the use of thick stainless steel heat spreaders, which can cause structural damage and exceed ergonomic temperature limits.
Innovation Solution
A thermal-control system incorporating a combination of heat spreaders and low thermal-resistance materials, including graphite sheets and thermal interface materials, to manage thermal zones and maintain temperatures below prescribed thresholds using convection, radiation, and conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a thick stainless steel heat spreader is used to dissipate heat, then heat dissipation capability is improved, but the weight of the device increases causing structural damage to connectors
Solution Approach 1:
The patent changes the material parameters by replacing thick stainless steel with thin aluminum heat spreaders (0.1-0.3mm thickness) combined with graphite sheets having high thermal conductivity. This parameter change achieves equivalent or superior heat dissipation capability while dramatically reducing the weight and thickness of the thermal management components, preventing structural damage to USB ports and HDMI connectors.
Solution Approach 2:
The patent employs composite thermal management structures combining aluminum heat spreaders with graphite sheets and thermal interface materials. This composite approach leverages the high thermal conductivity of aluminum in the vertical direction and the high in-plane thermal conductivity of graphite, achieving effective heat dissipation with significantly reduced weight compared to solid stainless steel heat spreaders.
2Loss of energy
If a single thick heat spreader is used to manage thermal loading, then heat dissipation is improved, but uneven heat distribution occurs leading to hot spots that damage IC devices
Solution Approach 1:
The patent divides the thermal management function into multiple segments: thin aluminum heat spreaders for vertical heat transfer, graphite sheets for in-plane heat distribution, and thermal interface materials for optimal thermal coupling. This segmentation allows each component to specialize in a specific thermal management task, achieving uniform heat distribution without hot spots while maintaining effective heat dissipation.
Solution Approach 2:
The patent applies different material properties to different locations and functions within the thermal management system. Aluminum heat spreaders provide localized vertical heat conduction near IC devices, graphite sheets provide lateral heat spreading to distribute heat evenly, and thermal interface materials provide optimized thermal coupling at specific contact points. This local quality approach ensures uniform heat distribution throughout the device.
3Loss of energy
If a single thick heat spreader is used to control temperature, then heat dissipation is improved, but exterior surfaces exceed ergonomic touch temperature limits
Solution Approach 1:
The patent transitions from a single thick heat spreader approach to a multi-layer thin-film structure consisting of aluminum heat spreaders, graphite sheets, and thermal interface materials arranged in multiple dimensions. This dimensional change creates multiple thermal conduction paths and increases the effective surface area for heat dissipation, thereby reducing the temperature of exterior surfaces to within ergonomic touch limits while maintaining effective heat dissipation.
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 system effectively dissipates heat across multiple thermal zones, maintaining temperatures within the media-streaming device at or below prescribed limits, reducing the risk of component damage and improving ergonomic safety.
Implementation Method 1
A first thermal interface material (TIM) is located between the first heat spreader and a first IC device mounted to a first generally planar surface of a PCB
Implementation Method 2
The thermal-control system may spread, transfer, and dissipate energy from a thermal-loading condition
Implementation Method 3
The thermal-control system incorporates a combination of heat spreaders and low thermal-resistance materials... to manage thermal zones and maintain temperatures below prescribed thresholds using convection, radiation, and conduction
Implementation Method 4
a first heat spreader that is separated from the first graphite sheet by a first air gap
Data Source
Figure 1
Figure 2
Figure 3
AI summary
This document describes a thermal-control system that is integrated into a media-streaming device. The thermal-control system includes a combination of heat spreaders and materials with high thermal-conductivity. The thermal-control system may spread, transfer, and dissipate energy from a thermal-loading condition effectuated upon the media-streaming device to concurrently maintain temperatures of multiple thermal zones on or within the media-streaming device at or below multiple respective prescribed temperature thresholds.