Double-Sided Display Cooling With Segmented Dust-Isolated Airflow
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Solution Overview
Problem
Electronic displays used in outdoor or high-temperature environments face cooling challenges, as ingesting ambient air can introduce dust and contaminants, leading to premature failures due to ineffective heat management.
Innovation Solution
The implementation of multiple separate flow paths for a fluid, including a closed loop and open loops, where ambient air is used to cool electronic components while preventing dust entry, with fans controlling airflow to optimize heat removal from both displays and thermal plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ambient air is ingested for cooling, then heat removal efficiency is improved, but dust and contaminants enter the display causing premature failures
Solution Approach 1:
The cooling system is divided into separate flow paths: a closed loop path for dust-free cooling of sensitive internal components, and separate open loop paths for cooling external display surfaces. This segmentation allows each path to be optimized for its specific function without compromise.
Solution Approach 2:
A sealed transparent panel acts as an intermediary barrier between the external environment and the internal electronics compartment. The closed loop cooling fluid circulates between the display and this panel, providing thermal coupling while maintaining physical separation from contaminants.
2Reliability
If a closed loop cooling system is used, then dust and contaminants are prevented from entering, but heat removal capability is reduced
Solution Approach 1:
The system merges closed loop and open loop cooling approaches by allowing the closed loop cooling fluid to interact thermally with multiple surfaces (display backlights, electronic components, transparent panel) while maintaining the sealed environment. This combines the reliability benefits of closed loop with the heat removal effectiveness of multiple thermal coupling points.
Solution Approach 2:
The cooling system extends into the spatial dimension by creating a three-dimensional closed loop path that circulates through multiple locations: behind the display, across electronic components, and between the transparent panel and display surface. This multi-dimensional heat extraction pathway maintains effectiveness while preserving the sealed environment.
3Temperature
If multiple separate flow paths are implemented, then heat removal from multiple components is optimized, but system complexity increases
Solution Approach 1:
The closed loop cooling system serves multiple functions simultaneously: it cools the LED backlight, cools electronic components in the sealed compartment, and cools the front transparent panel. This multi-functionality reduces the need for separate cooling systems for each component, thereby managing complexity while achieving comprehensive heat removal.
Solution Approach 2:
The system recovers thermal energy by capturing heat from multiple sources (display, electronics, panel) that would otherwise be wasted, and channeling it through the closed loop cooling system. This回收利用 approach optimizes heat removal efficiency while consolidating cooling infrastructure.
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 effectively cools electronic displays by isolating the cooling air from contaminants, reducing the risk of premature failure and ensuring efficient heat management in high-temperature environments.
Implementation Method 1
multiple separate flow paths for a fluid, such as air, through an electronic display housing... The closed loop path preferably circulates through a sealed electronics compartment as well as pass between the electronic display(s) and a front transparent panel
Data Source
AI summary
A rooftop mounted display assembly includes a first and second electronic display located at a housing for mounting to a roof of a vehicle. Apertures are vertically spaced apart along either end of thermal plates located behind the electronic displays. Fan(s), when activated, force ambient air through an inlet aperture located at a proximal end of the housing, the apertures at a first end of the thermal plates, channels located between the thermal plates and the electronic displays, the apertures at a second end of the thermal plates, and an exhaust aperture at a distal end of the housing.