Electronic Display Cooling Assembly with Circulating Gas
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Solution Overview
Problem
Electronic displays face challenges in cooling, particularly in outdoor environments with extreme temperatures and high brightness, leading to increased heat generation and difficulty in dissipating heat efficiently, especially with larger screen sizes.
Innovation Solution
A cooling system utilizing a combination of circulating gas and external air, where the gas removes heat from the front of the image assembly and external air cools the gas through a heat exchanger, with additional air flow across the rear to manage heat from the backlight, using a cross-flow or counter-flow heat exchanger to prevent gas mixing and employing fans within a manifold for noise reduction and even distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display brightness is increased to compete with ambient light, then the display visibility is improved, but the heat generation increases
Solution Approach 1:
The patent extracts heat from the display system by introducing a separate gas circulation pathway that specifically targets and removes heat generated by the backlight and display components, allowing the display to maintain high brightness without excessive temperature rise
Solution Approach 2:
The patent uses a circulating gas (such as nitrogen or fluorinated carbon) as an intermediary substance to transfer heat from the display components to a heat exchanger, where the heat is then dissipated to the external environment, effectively decoupling the heat generation from the display brightness
2Area of stationary object
If the screen size is increased, then the display area is improved, but the heat accumulation increases
Solution Approach 1:
The patent segments the cooling approach by creating separate circulation pathways: one for the front display surface and another for the rear backlight area, allowing targeted heat removal from different regions of the large display without requiring a proportional increase in overall cooling capacity
Solution Approach 2:
The patent adds a third dimension to heat dissipation by introducing rear air pathways that cool the backlight from behind, complementing the front gas circulation and enabling effective heat management across the entire display volume rather than just the surface
3Temperature
If external air is used to cool the display, then the cooling efficiency is improved, but the risk of contamination increases
Solution Approach 1:
The patent uses a circulating gas as an intermediary between the external environment and the display components. This gas circulates in a closed loop through the display, absorbing heat without direct contact with external contaminants, while still achieving effective cooling through the heat exchanger
Solution Approach 2:
The patent employs inert or chemically stable gases (such as nitrogen or fluorinated carbons) in the closed circulation system, creating an inert environment that prevents chemical reactions and contamination with the display components while maintaining effective heat transfer properties
4Temperature
If fans are placed outside the display to drive air flow, then the cooling capability is improved, but the noise level increases
Solution Approach 1:
The patent nests the fan units within the display housing structure itself, integrating them into the existing display architecture. This nested placement allows the fans to drive air flow through the cooling pathways while being acoustically isolated from the external environment, reducing perceived noise levels
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
Effectively cools electronic displays by maintaining clear gas circulation and external air pathways, ensuring efficient heat transfer without contamination, thus maintaining display performance across varying temperatures and brightness levels, suitable for both outdoor and indoor applications.
Implementation Method 1
The external air and the circulating gas may be drawn through a heat exchanger which will allow the heat to transfer from the circulating gas to the external air
Implementation Method 2
A heat sink may be placed within the display behind the electronic image assembly with a flow of external air drawn across the heat sink
Data Source
AI summary
The exemplary embodiments herein provide a system for cooling an electronic display where a plate is positioned behind the electronic display, the space between the plate and the electronic display defining a first channel. A first fan is preferably positioned to force a first flow of external air through the first channel. A heat exchanger is preferably positioned adjacent to the plate where the space between the heat exchanger and the plate defines a second channel; and a second fan is preferably positioned to force a second flow of external air through the second channel and through the heat exchanger. A continuous heat sink may be placed within the first channel. Pass through gaskets may be used to ensure the external air may cross paths with the circulating gas without permitted the external air and circulating gas to mix.