Outdoor Display Heat Dissipation via Isolated External Air Circulation
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Solution Overview
Problem
Outdoor flat panel displays face overheating issues due to high brightness requirements and constant sunlight exposure, leading to potential malfunctions and degradation of liquid crystal displays, with existing solutions like fans and air conditioning being bulky, expensive, and requiring frequent maintenance.
Innovation Solution
A display assembly with a heat dissipation system that includes a case with a detachable back plate forming a circulation space, a heat dissipation assembly with aluminum components and cooling fins, and a circulation structure featuring intake and exhaust channels with convection generators to introduce and discharge air externally, isolating the heat dissipation space from the internal case to prevent dust and vapor contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high brightness (2500 lm) is used for outdoor display, then visibility in sunlight is improved, but heat generation from illuminating components increases excessively
Solution Approach 1:
The patent divides the heat dissipation function into multiple components: a first heat dissipation component in direct contact with the backlight source, and a second heat dissipation component with cooling fins extending into the first circulation space. This segmentation allows heat to be dissipated through multiple pathways simultaneously, effectively managing the excessive heat generated by high brightness illumination.
Solution Approach 2:
The patent introduces a first circulation space between the front glass plate and the display module, filled with air that acts as a heat transfer medium. This intermediary air layer absorbs radiant heat from the display and circulates it away, preventing heat accumulation while allowing the high brightness display to operate effectively.
2Object-affected harmful factors
If transparent case is used for protection, then visibility and protection are improved, but heat accumulation occurs due to greenhouse effect
Solution Approach 1:
The patent extracts the heat dissipation function from the protective case structure by creating a separate first circulation space between the front glass plate and the display module. This extracted circulation path allows heat to be removed independently from the protective transparent case, preventing the greenhouse effect from causing harmful heat accumulation.
3Temperature
If discharging fans or air condition equipment are installed, then heat dissipation is improved, but device size increases and maintenance requirements increase
Solution Approach 1:
The patent implements a self-service heat dissipation system where the first and second heat dissipation components work together with the first circulation space to automatically dissipate heat through convection and radiation. The cooling fins on the second heat dissipation component passively enhance heat transfer to the circulating air, eliminating the need for active fans or air conditioning equipment 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
Effectively dissipates heat generated by the backlight and sunlight radiation while minimizing maintenance and cleaning workload by using external air circulation, keeping components and glass surfaces clean and reducing the risk of overheating.
Implementation Method 1
The circulation structure includes an intake channel, a convention generator, and an exhaust channel. The convection generator is disposed at the intake channel. The exhaust channel is connected between the first outlet and the second outlet. A second circulation space is form in the circulation structure by the intake channel, the heat dissipation assembly, and the exhaust channel, with the convection generator bringing an air flow to enter the first inlet through the second circulation space and be discharged from the first outlet.
Implementation Method 2
The first heat dissipation component contacts a backlight source of the display module and the second heat dissipation component includes the second inlet and the second outlet. The first heat dissipation component and the second heat dissipation component cooperatively form a heat dissipation space when the first heat dissipation component and the second heat dissipation component are connected with each other.
Implementation Method 3
the second heat dissipation component further includes a plurality of cooling fins extending towards the first circulation space
Data Source
AI summary
An outdoor flat panel display assembly is provided to redesign the back cover of a display module where an isolated external circulation structure may be implemented to the back cover of the display module and the back plate of the case. Cold air is introduced into the heat dissipation space within the back cover via external circulating route while heat produced by the backlight, the system circuit board, and by the radiation of the sun can be dissipated through the external circulating route. The external circulation space is completely isolated from the internal space of the case in such a way that the vapor and dust in the introduced cold air are in no way to have contact with the components of the display and the glass of the case.