Co-extruded Polycarbonate LED Housing for Thermal Management
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Solution Overview
Problem
Traditional LED lamp housings face challenges with high manufacturing costs, increased weight due to metal materials, and inefficiencies in heat transfer and moisture-proofing when using metal or conventional heat conductive resin compositions, which affect the performance and suitability of LED lamps as home lighting solutions.
Innovation Solution
An integrated LED lamp housing is created by co-extruding a heat conductive polycarbonate resin composition with magnesium oxide particles for the heat radiation section and a transparent polycarbonate resin composition with a light-diffusing agent for the light transmission section, providing excellent adhesion, heat conductivity, and moisture-proofing while maintaining economic efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If metal materials are used for the heat radiation section, then heat conductivity is improved, but manufacturing cost increases and weight increases
Solution Approach 1:
The patent changes the material parameter from metal to resin composition, and modifies the thermal conductivity parameter by incorporating heat conductive fillers (aluminum oxide, aluminum hydroxide, titanium oxide) into the polycarbonate resin, achieving adequate heat conductivity without metal material costs
Solution Approach 2:
The patent uses composite materials by combining polycarbonate resin with heat conductive inorganic fillers (aluminum oxide, aluminum hydroxide, titanium oxide) to create a resin composition that achieves metal-like heat conductivity while maintaining the advantages of resin materials
2Temperature
If metal materials are used for the heat radiation section, then heat conductivity is improved, but weight increases
Solution Approach 1:
The patent changes the material parameter from metal to resin composition, achieving adequate heat conductivity through filler incorporation while maintaining the lightweight characteristic of resin materials, thus reducing overall product weight
Solution Approach 2:
The patent creates a composite material system where polycarbonate resin serves as the lightweight matrix and inorganic fillers provide heat conduction, achieving a balance between weight and thermal performance
3Ease of manufacture
If heat conductive resin composition is used, then manufacturing cost is reduced, but heat conductivity deteriorates
Solution Approach 1:
The patent develops a composite resin composition incorporating multiple heat conductive fillers (aluminum oxide, aluminum hydroxide, titanium oxide) in specific proportions to achieve metal-level heat conductivity while maintaining resin material cost advantages
Solution Approach 2:
The patent optimizes the filler content parameter at 30-70 wt% and uses specific filler combinations to maximize heat conductivity while controlling viscosity and manufacturing cost
4Temperature
If ceramic fillers are increased to improve heat conductivity, then heat conductivity is improved, but viscosity increases and processability deteriorates
Solution Approach 1:
The patent uses a composite filler system combining multiple types of fillers (aluminum oxide, aluminum hydroxide, titanium oxide) with different properties to achieve synergistic effects, improving heat conductivity while controlling viscosity through complementary filler characteristics
Solution Approach 2:
The patent optimizes the total filler content parameter within 30-70 wt% and controls particle size distribution to balance heat conductivity enhancement with viscosity control, ensuring good extrusion and injection molding processability
5Adaptability or versatility
If sections are assembled by mechanical fastening, then manufacturing flexibility is improved, but moisture-proofing deteriorates
Solution Approach 1:
The patent merges the heat radiation section and light transmission section into a single integral structure through co-extrusion, eliminating connection interfaces and thereby preventing moisture penetration while maintaining manufacturing efficiency
6Adaptability or versatility
If sections are prepared separately and assembled, then manufacturing flexibility is improved, but productivity decreases
Solution Approach 1:
The patent combines the manufacturing process of the heat radiation section and light transmission section into a single co-extrusion operation, producing both sections simultaneously in one process, thereby dramatically improving productivity while maintaining design flexibility
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 results in an LED lamp housing with improved heat conductivity, moisture-proofing, and economic value, ensuring effective heat transfer and light diffusion while minimizing the use of insulating fillers, thus addressing the limitations of traditional methods.
Implementation Method 1
Heat can be transferred over a sort of acoustic particles called phonons. Phonons can be transferred through a medium having a crystalline structure because the phonon has properties of a sound wave. Thus, in a heat conductive resin composition, phonons may be easily and quickly transferred through heat conductive filler with a crystalline lattice.
Implementation Method 2
The heat radiation section and the light transmission section can be molded into an integral form or structure. The heat radiation section and the light transmission section can be prepared by co-extruding a heat conductive polycarbonate resin composition and a transparent polycarbonate resin composition.
Data Source
Figure 1~2
Figure 3(a)~3(b)
AI summary
An integrated LED lamp housing can include a heat radiation section and a light transmission section. The integrated LED lamp housing can be prepared by co-extruding different polycarbonate resin compositions.