Backlight Unit Dual Heat Sink Thermal Management
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Solution Overview
Problem
Conventional backlight units for display devices face challenges in efficiently radiating heat generated by the light emitting module, which can lead to thermal issues and reduced lifespan of the module.
Innovation Solution
The proposed solution involves a backlight unit design with a bottom cover, a light emitting module, a first heat sink on one side, and a second heat sink on the other side, positioned between the light emitting module and the first heat sink. The second heat sink includes a first heat radiating part that contacts the first heat sink and a second heat radiating part that contacts the light emitting module, allowing for effective heat transfer and radiation outside the unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional single heat sink design is used, then the structure is simple, but the heat radiation efficiency is insufficient
Solution Approach 1:
The heat sink is divided into a first heat sink and a second heat sink, where the second heat sink is positioned between the light emitting module and the first heat sink. This segmentation creates a multi-stage heat dissipation path that improves thermal management efficiency while maintaining reasonable structural complexity.
2Temperature
If the light emitting module is positioned close to the heat sink for better heat transfer, then heat dissipation improves, but the space for light emission is reduced
Solution Approach 1:
The heat dissipation structure extends in the vertical dimension with the second heat sink positioned between the light emitting module and the first heat sink. This multi-layer vertical arrangement enables effective heat transfer while preserving horizontal space for light emission.
3Temperature
If a second heat sink is added between the light emitting module and the first heat sink to improve heat transfer, then heat radiation efficiency increases, but the device complexity increases
Solution Approach 1:
The second heat sink acts as an intermediary component between the light emitting module and the first heat sink, facilitating more efficient heat transfer through an additional thermal conduction stage without requiring complete redesign of the existing heat sink structure.
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 design enhances heat radiation efficiency, reduces thermal gradients, and prolongs the lifespan of the light emitting module by ensuring effective heat dissipation, improving the overall performance of the display device.
Implementation Method 1
a second heat sink arranged in the other side of the bottom cover, the second heat sink located between the light emitting module and the first heat sink
Implementation Method 2
a backlight unit capable of emitting heat generated from a light emitting module outside smoothly
Data Source
AI summary
A backlight unit capable of emitting heat smoothly and a display device including the same are disclosed. The backlight unit includes a bottom cover; a light emitting module arranged in the bottom cover; a first heat sink arranged to an outside of the bottom cover; and a second heat sink arranged in the bottom cover, the second heat sink located between the light emitting module and the first heat sink.