LED Lighting Module Heat Dissipation and Waterproofing
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Solution Overview
Problem
LED-based streetlights face heat dissipation challenges, leading to reduced lifespan and potential overheating, as well as issues with water ingress causing short circuits, which existing designs fail to adequately address.
Innovation Solution
A lighting module with a heat dissipating plate and pad, a waterproof frame with projections, and a lens cover, which enhances heat dissipation and prevents water ingress by using elastic projections to secure the components effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a traditional streetlamp structure is used, then the lamp can be installed and operated, but heat dissipation is insufficient leading to overheating and reduced lifespan
Solution Approach 1:
The heat dissipating plate is divided into multiple fins that segment the heat transfer surface, increasing the total surface area for heat dissipation. This segmentation allows more efficient heat transfer from the LED module to the surrounding air, directly addressing the heat dissipation issue while maintaining operational lifespan.
Solution Approach 2:
The patent applies different structural qualities to different parts of the heat dissipating plate. The plate features varying fin densities and thicknesses in different regions, optimizing heat transfer efficiency in areas with higher heat generation while maintaining structural integrity. This local quality approach improves overall heat dissipation performance.
2Reliability
If the streetlamp is turned off to prevent overheating, then component failure is avoided, but the lighting function is not performed
Solution Approach 1:
The patent extracts the heat dissipation function from the overall lamp structure by implementing a dedicated heat dissipating plate with fins. This separate heat management system allows the lighting function to operate continuously without shutdown, as heat is actively managed independently, resolving the contradiction between reliability and productivity.
Solution Approach 2:
The heat dissipating plate acts as an intermediary between the LED light emitting module and the external environment. It mediates heat transfer, absorbing heat from the LED module and dissipating it to the air through fins, thereby preventing overheating while allowing continuous operation and maintaining lighting productivity.
3Shape
If a round-shaped lampshade is used to match existing streetlamp appearance, then aesthetic consistency is maintained, but heat dissipation becomes difficult
Solution Approach 1:
The patent transitions from two-dimensional surface heat dissipation to three-dimensional volumetric heat dissipation by implementing fins that extend in multiple directions. This dimensional change creates channels for air flow and significantly increases the heat transfer surface area, improving heat dissipation efficiency regardless of the overall lampshade shape.
Solution Approach 2:
The heat dissipating plate is segmented into multiple fins that create separate heat transfer pathways. This segmentation allows heat to be dissipated through multiple independent channels, overcoming the limitations of a round-shaped lampshade by providing extensive surface area for heat exchange in three-dimensional space.
4Reliability
If waterproofing structures are added to prevent water ingress, then safety is improved, but device complexity increases
Solution Approach 1:
The patent merges the waterproofing function with the existing structural components. The case and cover are designed to overlap and interlock, creating a waterproof seal without requiring separate waterproofing components. This integration maintains reliability while minimizing additional complexity.
Solution Approach 2:
The case and cover structures serve multiple functions: structural support, heat dissipation housing, and waterproofing. By making these components multi-functional, the patent achieves reliable waterproofing without adding dedicated waterproofing elements that would increase device complexity.
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
Improves heat dissipation efficiency, prevents water ingress, and maintains light distribution uniformity, thereby increasing the reliability and lifespan of LED-based streetlights.
Implementation Method 1
a heat dissipating plate including a plurality of heat dissipating fins disposed thereunder
Implementation Method 2
a heat dissipating plate including a plurality of heat dissipating fins disposed thereunder
Data Source
AI summary
The embodiments discloses a lighting module. The lighting module disclosed in the embodiments comprises: a heat dissipating plate including a plurality of heat dissipating fins at the lower portion thereof; a light emitting module having a printed circuit board coupled on the heat dissipating plate, and a plurality of light emitting devices disposed on the printed circuit board; a lens cover disposed on the light emitting module and having a plurality of lens units corresponding to the light emitting devices, respectively; and a waterproof frame disposed between the upper periphery of the heat dissipating plate and the lens cover, wherein the waterproof frame includes a first waterproof projection projecting in a direction toward the bottom surface of the lens cover and a second waterproof projection projecting in a direction toward the top surface of the heat dissipating plate.