Backlight Module Upper Filtering Device for Heat Dissipation
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Solution Overview
Problem
Existing backlight modules face issues with heat accumulation, leading to reduced luminance and shorter lamp life due to elevated temperatures, especially in the upper areas, and are prone to external dust and particle contamination through existing heat release methods.
Innovation Solution
A backlight module design featuring an upper filtering device that covers strategically placed openings in the back bezel and reflection panel, allowing hot air to escape while preventing external particulates from entering, thereby maintaining optimal lamp temperatures and improving light efficiency and lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an opening is disposed on the back bezel to release hot air, then heat reduction is achieved, but external dust and particles can enter the backlight module
Solution Approach 1:
A filtering device is introduced as an intermediary component between the opening and the external environment. The filter allows hot air to pass through while blocking external dust and particles, thus resolving the contradiction between heat release and contamination prevention
Solution Approach 2:
The filtering device uses a thin film or mesh structure that can be integrated into the opening of the back bezel. This thin film structure allows thermal convection while physically blocking particles, achieving both heat reduction and contamination prevention
2Illumination intensity
If lamps are disposed in upper areas for direct type backlight module, then light distribution is improved, but temperature increases causing lamp damage
Solution Approach 1:
The harmful hot air accumulated in the upper portion is extracted and removed from the system through the opening in the back bezel. This allows the upper lamps to continue providing good light distribution while the excessive heat is continuously evacuated, preventing temperature-related damage
3Illumination intensity
If multiple lamps are used to increase luminance, then light output is improved, but heat accumulation increases reducing lamp life
Solution Approach 1:
The filtering device enables continuous heat removal through the opening in the back bezel. By maintaining continuous thermal convection, multiple lamps can operate at high luminance output without heat accumulation, ensuring sustained lamp life and consistent performance
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 reduces hot air concentration, maintains lamp efficiency and uniformity, and extends the operational life of the backlight module by ensuring more lamps operate within their optimal temperature ranges while preventing external contamination.
Implementation Method 1
the upper filtering device covers the upper opening
Implementation Method 2
since hot air rises, lamps disposed in the upper areas suffer from higher temperatures
Data Source
AI summary
A backlight module is provided. The backlight module comprises a light source, a reflection panel, a back bezel, and an upper filtering apparatus. The reflection panel has a first upper portion, which is essentially disposed at an outer side of the light source, and is used to reflect lights projecting from the light source. The back bezel has a second upper portion which is essentially disposed at an outer side of the reflection panel. At least one of the first upper portion and the second upper portion forms an upper opening. The filtering apparatus covers the openings. The filtering apparatus is capable of changing the distribution of the temperature of the light source to allow more efficient lamp activity. As a result, luminance is increased and lamp life extended.