Backlight Unit Thermal Management via Segmented Airflow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large liquid crystal display devices with higher definition and power requirements face challenges in heat management, leading to potential increased weight, noise, and reduced service life due to the use of numerous fans for cooling, which may not effectively dissipate heat and can adversely affect peripheral electronic components.
Innovation Solution
An illumination device with a support plate, frame body, partition portion, and strategically placed intake and exhaust ports and fans to create efficient air flow paths for heat dissipation, reducing the number of fans and material usage while preventing deformation and ensuring smooth air flow around control boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large number of fans are provided to suppress temperature increase, then heat dissipation performance is improved, but weight and noise increase
Solution Approach 1:
The internal space of the backlight unit is divided into multiple regions by partition walls, with each region having its own intake port and fan. This segmentation allows for distributed heat dissipation across multiple smaller zones, improving overall thermal management efficiency while enabling the use of smaller, lighter fans compared to a single large fan system.
Solution Approach 2:
Different regions within the backlight unit are equipped with intake ports and fans based on their specific heat generation characteristics. High-heat areas receive dedicated cooling resources, while lower-heat areas use fewer or smaller fans, optimizing the balance between heat dissipation performance and overall system weight.
2Temperature
If a large number of fans are provided to suppress temperature increase, then heat dissipation performance is improved, but noise increases
Solution Approach 1:
The cooling system is divided into multiple independent regional units, each with its own fan. This allows the total airflow requirement to be distributed across multiple smaller fans that operate at lower individual speeds and noise levels, rather than requiring one or few high-speed fans that generate excessive noise.
Solution Approach 2:
Instead of using a single large fan design, the patent employs multiple smaller fan units that replicate the basic fan structure. Each small fan generates minimal noise, and their combined operation achieves the required total airflow without the noise penalty of large high-speed fans.
3Temperature
If air is forcibly flowed on the rear surface side by using fans, then heat discharge is improved, but air stagnation occurs and heat exhaustion effect is reduced
Solution Approach 1:
The backlight unit's internal space is divided into multiple regions with partition walls, and intake ports and fans are distributed across these regions. This segmentation creates multiple independent air flow paths that prevent dead zones and air stagnation, ensuring comprehensive heat discharge throughout the entire backlight unit.
Solution Approach 2:
The cooling system transitions from a single-dimension approach (one or few fans creating linear air flow) to a multi-dimensional approach with fans distributed across multiple regions and heights. This three-dimensional distribution of air flow paths eliminates stagnation zones and ensures uniform heat exhaustion throughout the backlight unit volume.
4Temperature
If numerous fans are used for cooling, then temperature control is improved, but device complexity increases
Solution Approach 1:
The cooling system is segmented into multiple regional units, each with its own fan and intake port. While this increases the number of components, each regional unit is a simple, standardized module that is easy to manufacture and assemble, reducing overall system complexity compared to a single complex cooling mechanism.
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 effectively discharges heat while minimizing weight and noise, ensuring stable high-luminance illumination and extending the service life of the backlight unit and its components.
Implementation Method 1
a fan that allows air in the area inside the frame body to be discharged
Implementation Method 2
a light source, a support plate that supports the light source
Data Source
AI summary
A backlight unit 20 that radiates light toward a display panel 4 includes LEDs 22, a backlight chassis 21 that includes a rear surface side wall portion 21a that supports the LEDs 22, an insulating frame body 24 that forms a space covering a surface of the rear surface side wall portion 21a on the side opposite to the side on which the LEDs 22 are supported, a partition portion 24a that partitions a space inside the insulating frame body 24 into a plurality of regions, intake ports 24c that cause air to flow inside the insulating frame body 24, and exhaust ports 24d that cause air inside the insulating frame body 24 to be discharged, the intake ports 24c and the exhaust ports 24d being provided on the insulating frame body 24 so as to correspond to each of the regions partitioned by the partition portion 24a.