Display Device Dual-Pass Cooling for Heat Radiation
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Solution Overview
Problem
Existing display devices face inefficiencies in heat radiation, particularly in indirect cooling methods where external air is not directly exchanged with heat generation regions, leading to insufficient heat exchange and potential temperature rises.
Innovation Solution
A dual-pass air circulation system is implemented within the display device, combining closed and open passages to enhance heat radiation efficiency by directing natural and forced convection, with strategically placed through-holes and fans to manage airflow and heat exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If indirect cooling method using heat exchanger is used, then protection from dust and foreign substances is improved, but heat radiation efficiency deteriorates
Solution Approach 1:
The cooling system is divided into multiple independent passages: a first passage that allows direct air cooling of the display module front surface, and a second passage that provides indirect cooling for the rear backlight unit through a heat exchanger. This segmentation enables each passage to be optimized for its specific cooling function, with the first passage maximizing heat radiation efficiency and the second passage maintaining protection from dust and foreign substances.
2Device complexity
If single circulation structure is provided, then device complexity is reduced, but heat exchange effectiveness deteriorates
Solution Approach 1:
The air circulation system is segmented into two separate passages with distinct functions. The first passage circulates air directly across the display module front surface for efficient heat exchange, while the second passage circulates air through the heat exchanger for indirect cooling of the rear backlight unit. This segmentation ensures that each passage is optimized for its specific heat exchange requirements, improving overall cooling effectiveness without excessive complexity.
Solution Approach 2:
Different regions of the display device receive different cooling approaches tailored to their specific heat generation characteristics. The front display module, which generates significant heat, receives direct air cooling through the first passage. The rear backlight unit, which also generates heat but is located in a different thermal environment, receives indirect cooling through the second passage and heat exchanger. This local quality approach ensures effective heat exchange at each specific location.
3Object-affected harmful factors
If external air is not directly heat exchanged with heat generation region, then protection from foreign substances is improved, but heat radiation efficiency deteriorates
Solution Approach 1:
The cooling system is segmented into two passages: the first passage allows external air to directly contact and cool the display module front surface, maximizing heat radiation efficiency. The second passage uses a heat exchanger to indirectly cool the rear backlight unit, maintaining protection from foreign substances. This segmentation resolves the contradiction by applying direct cooling where heat radiation efficiency is paramount and indirect cooling where protection from foreign substances is critical.
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 system effectively enhances heat radiation efficiency by directly exchanging heat from critical regions like the display module, minimizing visibility obstructions, and maintaining device thickness while improving overall cooling performance.
Implementation Method 1
The heat exchanger may have an internal fan assembly for drawing ambient air through the heat exchanger and exhausting it out of the display housing
Implementation Method 2
an indirect cooling method configured to generate heat exchange between external air and internal air of the device, using a heat exchanger
Implementation Method 3
generate heat exchange between external air and internal air of the device
Data Source
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AI summary
There is disclosed a display device comprising a light source unit, an optical sheet spaced a preset distance apart from a front of the light unit, a display panel spaced a preset distance apart from a front surface of the optical sheet, a module case configured to form at least one of a first space between the display panel and the optical sheet, a second space between the optical sheet and the light source unit and a third space in a rear surface of the light source unit, a through-hole formed in the module case and at least one of the first through third spaces, and an outer case configured to form an internal space partitioned off from an external space and a first closed passage located in the internal space by mounted the module case, wherein the first passage is located in the first closed passage.