Backlight Unit Frame with Bent Structure for Heat Dissipation
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Solution Overview
Problem
Current backlight units for display devices face challenges in efficiently dissipating heat and uniformly diffusing light, which can lead to reduced performance and lifespan, particularly in high-brightness applications.
Innovation Solution
The proposed backlight unit incorporates a frame with a bent structure to enhance rigidity and heat dissipation, featuring a light guide plate, reflection sheet, and optical sheet, along with a housing that exposes a portion for easy maintenance and improved heat release, and uses a COB-type light source for increased efficiency and reduced thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional backlight unit structure is used, then the structure is simple and easy to manufacture, but heat dissipation is inefficient and light distribution is non-uniform
Solution Approach 1:
The frame is divided into a bottom frame and side frames that are bent at specific angles (e.g., 45 degrees) to create segmented heat dissipation surfaces. This segmentation increases the effective heat dissipation area while maintaining a relatively simple overall structure that can be manufactured using standard processes.
Solution Approach 2:
The frame structure is bent from a flat two-dimensional configuration into a three-dimensional form with elevated portions and angled surfaces. This dimensional change creates additional heat dissipation surfaces that expose greater surface area to the surrounding environment, improving thermal management without significantly complicating the manufacturing process.
2Length of moving object
If the light guide plate is made thinner to reduce display device thickness, then the overall device thickness is reduced, but structural rigidity and heat dissipation capability deteriorate
Solution Approach 1:
The frame is constructed using composite material layers including a rigid support layer and a heat dissipation layer with different thermal and mechanical properties. This composite structure provides enhanced rigidity and heat dissipation capability while allowing the light guide plate to maintain a thin profile, as the frame's composite construction compensates for the reduced thickness.
3Length of moving object
If the light guide plate is made thinner to reduce display device thickness, then the overall device thickness is reduced, but heat dissipation capability deteriorates
Solution Approach 1:
The frame's heat dissipation surface is segmented into multiple angled surfaces and elevated portions that increase the effective heat dissipation area. This segmentation allows the thin light guide plate configuration to be supported by a frame structure that compensates for reduced heat dissipation volume through increased surface area exposure.
Solution Approach 2:
The frame structure transitions from a flat configuration to a three-dimensional form with bent portions and elevated surfaces. This dimensional change creates additional heat dissipation surfaces that compensate for the reduced heat dissipation volume resulting from the thinner light guide plate, maintaining effective thermal management.
4Ease of repair
If a conventional frame structure is used, then manufacturing is simple, but maintenance access and heat release are limited
Solution Approach 1:
The frame is designed with portions that can be easily removed or accessed, such as detachable side frames or open configurations that allow maintenance personnel to access internal components. This extraction approach enables simplified maintenance procedures while the overall frame structure remains relatively simple and manufacturable.
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 configuration ensures effective heat dissipation, uniform light distribution, and improved power efficiency, enhancing the performance and longevity of the display device while simplifying maintenance and reducing weight.
Implementation Method 1
a light guide plate, reflection sheet, and optical sheet
Implementation Method 2
a frame bent at a predetermined angle to have a predetermined rigidity and to efficiently dissipate heat generated by the COB-type light source
Data Source
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AI summary
A backlight unit and a display device including the same are provided. The backlight unit includes: a frame; a reflection sheet located on the frame; a housing coupled to at least one side of the frame; a substrate located on the housing; a light assembly mounted on the substrate; and a light guide plate located opposite to the light assembly on the reflection sheet, wherein the housing is exposed to the outside of the frame. Therefore, as the housing is exposed to the outside of the frame, even if a problem occurs in a light assembly, by separating only the housing, the problem can be solved, and the housing is exposed to the outside of the frame to enhance a heat releasing effect.