Backlight Module Metal Rear Frame Heat Dissipation
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Solution Overview
Problem
Current backlight modules for liquid crystal display devices have poor heat dissipation efficiency due to insulating mold frames, leading to thermal energy accumulation and increased temperatures when light sources are activated.
Innovation Solution
A backlight module design featuring a metal rear frame with inverted U-shaped side edges and multiple carrying portions for light-emitting units, which enhances heat dissipation by allowing direct contact between light-emitting units and the metal frame, and includes a mold frame with strategically distributed holes for improved bonding and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating mold frame is used for mounting light sources, then electrical insulation is provided, but heat dissipation efficiency deteriorates leading to thermal energy accumulation
Solution Approach 1:
The frame structure is divided into two distinct parts: an insulating mold frame for electrical isolation and a metal rear frame for heat dissipation. The light sources are mounted on both frames simultaneously, with the mold frame providing electrical insulation and the metal frame conducting heat away from the light sources, thus resolving the contradiction between insulation and heat dissipation
Solution Approach 2:
The metal rear frame acts as an intermediary component between the light sources and the heat dissipation system. It directly contacts the light sources to conduct heat away while the mold frame provides the necessary electrical insulation, allowing both functions to coexist without interference
2Adaptability or versatility
If multiple light sources are mounted on single-level frame, then lighting requirements are met, but heat dissipation efficiency deteriorates due to limited contact area
Solution Approach 1:
The frame structure transitions from a single-level mounting to a multi-level configuration with the metal rear frame having different height levels. Light sources are mounted at various heights on the metal frame, increasing the total contact area between the light sources and the heat-conducting metal surface, thereby improving heat dissipation while accommodating multiple lighting requirements
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 design improves heat conduction and dissipation efficiency, reduces thermal energy accumulation, and enhances assembly efficiency and structural stability, while allowing for 2D and 3D display modes with high-resolution image projection.
Implementation Method 1
The metal rear frame has a first carrying portion, and a second carrying portion spaced from the first carrying portion... One of the plurality of light-emitting units is disposed on the first carrying portion, and another one of the light-emitting unit is disposed on the second carrying portion... the metal rear frame is provided with a rectangular body area, a first side edge area connected to one side of the body area
Data Source
AI summary
A backlight module comprises a frame unit, a plurality of light-emitting units, a first optical unit and a second optical unit. The frame unit includes a metal rear frame. The metal rear frame has a first carrying portion, and a second carrying portion spaced from the first carrying portion. The first carrying portion and the second carrying portion are not at the same height. One of the plurality of light-emitting units is disposed on the first carrying portion, and another one of the plurality of light-emitting units is disposed on the second carrying portion. The first optical unit is configured to receive the light generated from the light-emitting unit disposed on the first carrying portion, and the second optical unit is configured to receive the light generated from the light-emitting unit disposed on the second carrying portion. Through the structure of the metal rear frame, the light-emitting unit can directly contact the metal rear frame and the heat dissipation efficiency can be enhanced. The present invention provides a display device including the backlight module.