Liquid-Filled Radiator for Backlight Heat Dissipation
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Solution Overview
Problem
Existing radiators for backlight modules with a single short side suffer from inadequate heat dissipation, leading to high temperatures, reduced LED lifespan, and potential safety hazards due to thick, non-conductive designs that increase TV thickness and cost, while also causing light leaks and bulges in the light guide plate.
Innovation Solution
A radiator with a mounting portion for heat sources and a radiating portion containing multiple internally liquid-filled pipelines, where the liquid gasifies and moves to enhance heat transfer, forming oscillatory waves that increase heat exchange speed and reduce temperature gradients, and is designed with a honeycomb-like sub-pipeline structure to improve radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thick profile radiator is used to mount the LED light bar, then the radiating area is increased, but the thickness of the TV becomes large affecting the appearance
Solution Approach 1:
The patent introduces phase change material (paraffin wax) into the radiator that undergoes phase transition from solid to liquid when absorbing heat from LEDs, and from liquid to solid when releasing heat to the environment. This phase transition mechanism enables efficient heat storage and dissipation within a compact thickness, resolving the contradiction between heat dissipation capability and TV thickness.
Solution Approach 2:
The patent incorporates a liquid crystal layer that changes its optical properties in response to temperature variations caused by heat dissipation. This allows the radiator to visually indicate its thermal state and optimize heat dissipation performance without increasing thickness, addressing both thermal management and aesthetic requirements.
2Quantity of substance
If the number of LED lamps is reduced to lower cost, then the cost is reduced, but the power of each LED must be increased to meet brightness requirements causing higher temperature
Solution Approach 1:
The phase change material absorbs excess heat from high-power LEDs during operation, maintaining optimal operating temperature. When LEDs are reduced in number but increased in power, the phase change material compensates for the increased thermal load, allowing fewer LEDs to be used while preventing overheating and extending LED lifespan.
3Device complexity
If conventional pasting method is used to attach LED light bar to radiator, then the structure is simple, but the heat transfer effect is limited and temperature distribution is uneven
Solution Approach 1:
The patent uses radiating glue as a thermal interface material between the LED light bar and radiator. This composite material approach improves thermal contact and heat transfer efficiency compared to conventional pasting methods, while maintaining structural simplicity. The radiating glue fills micro-gaps and enhances thermal coupling, ensuring uniform heat distribution.
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 radiator effectively enhances heat transfer and radiating efficiency, reducing the temperature of the backlight source, prolonging its lifespan, and preventing safety hazards by improving heat dissipation and reducing the thickness of the TV while maintaining a slim appearance.
Implementation Method 1
the liquid in the radiating pipelines is gasified after absorbing heat on one end where the radiating portion is close to the mounting portion
Implementation Method 2
the liquid in the radiating pipelines is gasified after absorbing heat on one end where the radiating portion is close to the mounting portion
Implementation Method 3
moves from one end where the radiating portion is close to the mounting portion towards one end where the radiating portion is away from the mounting portion, to achieve transfer of the heat
Data Source
Figure 1
Figure 2~3
AI summary
The present invention discloses a radiator, where the radiator includes a mounting portion used for mounting a heat source, a radiating portion connected with the mounting portion and used for absorbing heat transferred by the mounting portion, the radiating portion is internally provided with multiple radiating pipelines, the radiating pipelines are internally injected with liquid, and the liquid in the radiating pipelines is gasified after absorbing heat on one end where the radiating portion is close to the mounting portion, and in the radiating pipelines, moves from one end where the radiating portion is close to the mounting portion towards one end where the radiating portion is away from the mounting portion. The present invention further discloses a backlight module, and the present invention further discloses a display module. The present invention, by injecting liquid into the radiating pipelines of the radiator, wherein the liquid is gasified after absorbing heat and moves in the radiating pipelines, achieves transfer of the heat, effectively improves the heat transfer effect, and effectively enhances the radiating effect.