Backlight Unit Heat Dissipation via Intermediary Members
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Solution Overview
Problem
Conventional backlight units for display devices face challenges in efficiently radiating heat generated by light emitting modules, which can lead to thermal distortion and reduced light efficiency.
Innovation Solution
The proposed backlight unit incorporates a bottom cover with a light emitting module, a reflective sheet, and a heat radiation system comprising first and second heat radiating members, where the second heat radiating member contacts the light emitting module and first heat radiating members, with a projected part supporting the reflective sheet to maintain a predetermined distance and enhance heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the reflective sheet is placed close to the light emitting module to improve light efficiency, then light efficiency is improved, but heat radiation is hindered causing thermal distortion
Solution Approach 1:
The patent introduces heat radiating members as intermediary components between the light emitting module and the reflective sheet. These members conduct heat away from the light emitting module while allowing the reflective sheet to maintain its position for efficient light reflection, thus resolving the conflict between light efficiency and heat radiation.
Solution Approach 2:
The patent segments the space between the light emitting module and the reflective sheet by inserting heat radiating members at specific intervals. This segmentation allows simultaneous achievement of close proximity for light efficiency and adequate heat dissipation pathways.
2Temperature
If heat radiating members are added to improve heat radiation, then heat radiation is improved, but device complexity increases
Solution Approach 1:
The heat radiating members are designed to serve multiple functions: they conduct heat away from the light emitting module, maintain the spacing between components, and provide structural support for the reflective sheet. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
3Temperature
If the reflective sheet is spaced apart from heat radiating members to improve heat radiation, then heat radiation is improved, but light efficiency decreases
Solution Approach 1:
The patent applies local quality by creating different spacing relationships in different regions: the reflective sheet is spaced apart from heat radiating members in areas where heat radiation is critical, while maintaining close proximity in areas where light reflection efficiency is more important. This localized approach optimizes both heat radiation and light efficiency.
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 effectively radiates heat away from the light emitting module, preventing thermal distortion and improving light efficiency by maintaining optimal spacing and contact areas between heat radiating components.
Implementation Method 1
a second heat radiating member arranged between the light emitting module and the first heat radiating members
Implementation Method 2
a reflective sheet provided on the bottom cover, the reflective sheet spaced apart a predetermined distance from the bottom cover
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 a predetermined area of the bottom cover, a reflective sheet provided on the bottom cover, the reflective sheet spaced apart a predetermined distance from the bottom cover, a plurality of first heat radiating members provided between the reflective sheet and the bottom cover, the plurality of the first heat radiating members spaced apart a predetermined distance from each other, a second heat radiating member arranged between the light emitting module and the first heat radiating members, and a projected part located in the second heat radiating member below the reflective sheet, the projected part supporting the reflective sheet to locate the reflective sheet spaced apart a predetermined distance from the first heat radiating members.