Light Source Module Heat Conductive Columns for Automotive Lighting
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Solution Overview
Problem
Traditional light source modules for automotive lighting face issues with heat accumulation and high thermal resistance, leading to light attenuation and reduced luminous efficiency in electric vehicles, as the heat conduction path through ceramic substrates to metal substrates is inefficient.
Innovation Solution
Incorporating heat conductive columns made of high thermal conductivity materials that penetrate through the ceramic substrate to the metal substrate, ensuring direct contact with light emitting units to facilitate rapid heat dissipation and reduce thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light emitting units are tightly arranged to improve light intensity, then illumination intensity is improved, but heat accumulation increases and thermal resistance increases
Solution Approach 1:
The patent divides the heat conduction path into multiple segments by introducing heat conductive columns between the light emitting units and the metal substrate. This segmentation allows heat to be conducted through dedicated thermal pathways rather than relying solely on the ceramic substrate, effectively separating the optical function from the thermal management function.
Solution Approach 2:
The heat conductive columns act as intermediary elements that facilitate heat transfer from the light emitting units to the metal substrate. These columns serve as a bridge between the heat-generating components and the heat-dissipating substrate, improving thermal conductivity without interfering with the optical performance.
2Device complexity
If traditional thermoelectric separation structure is used with heat conduction through ceramic substrate to metal substrate, then structural simplicity is maintained, but thermal resistance is high and heat dissipation is inefficient
Solution Approach 1:
The patent employs composite material structure by combining ceramic substrate, heat conductive columns, and metal substrate into an integrated thermal management system. This composite approach leverages the advantages of each material: the ceramic substrate provides electrical insulation and mechanical support, while the heat conductive columns and metal substrate provide efficient heat dissipation pathways.
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
This solution effectively reduces heat accumulation, enhances the service life and optical performance of light emitting units by improving thermal conductivity and lowering thermal resistance, thereby maintaining efficient light output in automotive lighting fixtures.
Implementation Method 1
the heat conductive column penetrates through the ceramic substrate to the metal substrate. Two ends of the heat conductive column are respectively in contact with the light emitting unit and the metal substrate. Therefore, the heat generated by the light emitting unit can be conducted downward more quickly
Data Source
AI summary
A light source module including a ceramic substrate, copper traces, light emitting units, and heat conductive columns is provided. The first heat conductive column and the second heat conductive column correspond to the first light emitting unit and the second light emitting unit respectively. The negative electrode of the first light emitting unit is connected to the first copper trace, the positive electrode of the second light emitting unit is connected to the second copper trace, and the positive electrode of the first light emitting unit and the negative electrode of the second light emitting unit are connected to the third copper trace. An end of the first heat conductive column is connected to the positive electrode of the first light emitting unit, and an end of the second heat conductive column is connected to the negative electrode of the second light emitting unit.