Adjustable Air Gap for Mobile Device Thermal Management
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Solution Overview
Problem
Mobile devices face challenges in managing heat generation, which limits user comfort and performance, especially in handheld mode, as the air gap necessary for heat dissipation becomes a thermal resistance in docking mode, preventing significant performance gains.
Innovation Solution
An adjustable gap structure that uses magnets or elastic mechanisms to maintain a sufficient air gap in handheld mode and reduce or eliminate it in docking mode, allowing for enhanced heat transfer to external thermal solutions, thereby increasing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an air gap is maintained between the processing element and back cover in handheld mode, then user comfort is improved by reducing heat transfer to the user, but thermal resistance increases in docking mode, limiting performance gains
Solution Approach 1:
The air gap between the processing element and back cover is made dynamically adjustable rather than fixed. In handheld mode, the air gap is maintained at a larger distance to reduce heat transfer to the user. In docking mode, the air gap is reduced or eliminated to improve thermal contact with the docking station's heat dissipation system, thereby resolving the contradiction between user comfort and performance.
Solution Approach 2:
The physical parameter of the air gap distance is changed based on operational mode. The system transitions from a state with larger air gap (handheld mode) to a state with reduced or eliminated air gap (docking mode), allowing optimization of both thermal isolation for user comfort and thermal conduction for performance.
2Volume of moving object
If the form factor of mobile devices is reduced in size, then device portability is improved, but heat generation from processing elements increases, limiting user comfort and performance
Solution Approach 1:
The adjustable air gap mechanism allows the device to dynamically adapt its thermal management strategy based on usage context. In handheld mode, the larger air gap compensates for the reduced form factor by providing thermal isolation. In docking mode, the reduced air gap enables efficient heat transfer to the external docking station, allowing the compact device to achieve high performance without excessive heat generation.
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
This solution improves user comfort by maintaining air gap in handheld mode while enabling increased performance in docking mode through effective heat dissipation, reducing thermal resistance and allowing the processing element to operate at higher performance levels.
Implementation Method 1
one or more magnets to provide a magnetic force on the one or more ferromagnetic elements
Implementation Method 2
transitioning the mobile device into a second mode in response to an external magnetic field overcoming a magnetic force of the one or more magnets
Implementation Method 3
enabling increased performance in docking mode through effective heat dissipation, reducing thermal resistance
Data Source
AI summary
Embodiments are generally directed to an adjustable gap structure for mobile devices. An embodiment of a mobile device includes a cover; a printed circuit board including a processing component and thermal solution, the printed circuit board being movable along a first axis towards or away from the cover to provide an adjustable air gap; one or more ferromagnetic elements coupled with the printed circuit board; and one or more magnets, wherein, in first mode, the one or more magnets are to attract the one or more ferromagnetic elements and maintain an air gap of a first distance between the thermal solution and the cover, and wherein, in a second mode, an external magnetic force is to pull the ferromagnetic elements away from the one or more magnets and reduce the air gap between the thermal solution and the cover.