Backlight Radiator with Phase Change Heat Absorption for HDR Displays
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Solution Overview
Problem
The existing heat dissipation methods for backlight modules in high dynamic range (HDR) display devices are inadequate, leading to overheating of LED bulbs due to weak heat dissipation capacity, which reduces their lifespan and reliability.
Innovation Solution
A backlight module design featuring a radiator with a heat absorption part, a condensation part, and a pipe system that enhances heat dissipation by allowing heat to be absorbed from the light bar, condensed, and then dissipated through thermal convection, using a back plate with strategically positioned radiating fins and a thermal adhesive for efficient heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED bulbs with higher brightness and wider color gamut are used to achieve HDR technology, then the brightness and contrast of images are improved, but the temperature rise of the light bar increases, which is not good for the life of LED bulbs and the reliability of the backlight module
Solution Approach 1:
The radiator is divided into multiple functional parts: heat absorption part, condensation part, and pipe system. This segmentation allows different regions to perform specialized heat management functions - absorption near the light bar, condensation in the condensation part, and heat dissipation through the pipe system to surrounding structures.
Solution Approach 2:
The radiator acts as an intermediary component between the light bar and the surrounding environment. It includes thermal adhesive for heat transfer from the light bar, phase change material for heat absorption and transport, and radiating fins for heat dissipation to the ambient air, thereby mediating the thermal management process.
2Device complexity
If the commonly used heat dissipation method of connecting the light bar with the back plate through thermal adhesive is used, then the structure is simple, but the heat dissipation capacity is weak
Solution Approach 1:
The radiator utilizes phase change material that transitions from solid to liquid and back, absorbing and releasing heat during these phase transitions. This phase change mechanism significantly enhances the heat dissipation capacity compared to simple thermal adhesive bonding, while maintaining a relatively compact structure.
Solution Approach 2:
The radiator extends heat dissipation into additional spatial dimensions by incorporating radiating fins that project outward from the main body. This increases the effective heat dissipation surface area beyond the simple back plate contact, thereby improving heat dissipation capacity without substantially increasing the overall device footprint.
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 significantly improves the heat dissipation capacity of the backlight module, reducing the risk of overheating and extending the lifespan of LED bulbs, thereby enhancing the reliability and performance of HDR display devices.
Implementation Method 1
a heat absorption part, a condensation part and a pipe; wherein the heat absorption part and the condensation part are communicated with each other by the pipe
Implementation Method 2
the heat absorption part and the condensation part are communicated with each other by the pipe
Implementation Method 3
most of the other electric energy is almost converted into heat energy, which makes the temperature of LED element increasing
Implementation Method 4
the condensation part is spaced from the heat absorption part
Data Source
AI summary
The present disclosure provides a display device and a backlight module thereof, the backlight module comprises a back plate, light bars and a radiator, and the back plate comprises a bottom plate and a first side plate disposed at one side of the bottom plate. The light bar is disposed at the inner side of the first side plate; the radiator comprises a heat absorption part, a condensation part and a pipe, the heat absorption part and the condensation part are communicated with each other by the pipe. the heat absorption part is disposed between the first side plate and the light bar, and the heat absorption part is configured to absorb the heat emitted by the light bar; and the condensation part is disposed at the outer side of the bottom plate.