Transparent Liquid-Cooled Display Cover for Thermal Management
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Solution Overview
Problem
Conventional tablet computers lack the mechanical strength and effective heat dissipation required for safe operation in explosion-prone areas, with high surface temperatures posing a risk of ignition and capacitive signal detection being compromised by additional glass panes.
Innovation Solution
A transparent cover with a circulating liquid coolant is integrated into the display, utilizing natural convection for heat removal and maintaining capacitive coupling for touchscreen functionality, comprising toughened glass or ceramic cover elements with a suitable liquid and adhesive for enhanced mechanical strength and thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an additional transparent glass pane is applied to increase mechanical strength, then the mechanical strength of the display is improved, but the capacitive signal detection accuracy deteriorates
Solution Approach 1:
A transparent liquid with high dielectric constant is introduced as an intermediary substance between the touchscreen and the additional glass pane. This liquid mediator maintains strong capacitive coupling between the user's touch and the display sensor, while still allowing the glass pane to provide enhanced mechanical strength and protection.
Solution Approach 2:
The dielectric constant parameter of the medium between the touchscreen and glass pane is changed from air (low dielectric constant) to a transparent liquid (high dielectric constant). This parameter change ensures that the capacitive signal detection remains accurate even with the additional glass pane present, as the liquid maintains stronger electrical coupling.
2Strength
If an additional glass pane is applied to increase mechanical strength, then the mechanical strength of the display is improved, but the heat removal capability deteriorates
Solution Approach 1:
A liquid cooling system is implemented where transparent liquid circulates between the display and the additional glass pane. The liquid absorbs waste heat from the display through convection and conduction, transporting it away to prevent overheating while maintaining the structural integrity provided by the glass pane.
Solution Approach 2:
The display structure is transformed into a composite system combining glass pane, transparent liquid coolant, and display components. This composite structure simultaneously provides mechanical strength from the glass and effective heat removal through the liquid cooling medium.
3Device complexity
If conventional tablet display is used, then the device simplicity is maintained, but the safety in explosion-prone areas deteriorates due to high surface temperatures
Solution Approach 1:
The waste heat generated by the display, which is normally a harmful factor causing overheating and ignition risk, is converted into a beneficial driving force for natural convection cooling. The temperature differences created by display operation drive the circulation of coolant liquid, which then removes the excess heat, preventing dangerous temperature accumulation.
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 provides enhanced mechanical strength, prevents temperature peaks, ensures reliable capacitive coupling, and effectively dissipates heat, making the device safer for use in explosion-prone environments.
Implementation Method 1
the physical effect of natural convention is utilized: the portion of the liquid located close to the display absorbs the waste heat emitted by the display which leads to an increase in temperature and density of the liquid in this area. Consequently this results in gravity circulation of the coolant
Implementation Method 2
the previously explained effect of natural convention is also known to the relevant person skilled in the art as thermosiphon cooling
Implementation Method 3
Consequently this results in gravity circulation of the coolant, i.e. in the gravitational field the heated coolant experiences an uplift contrary to the force of gravity
Data Source
AI summary
A device arrangement may include an electronic device having a display. A cover may be secured on the display. The cover may include a first transparent cover element and a second transparent cover element. A transparent liquid may be disposed in a sandwich-like manner between the first cover element and the second cover element.