Automotive Laser Diode Lamp Module with Dual Heat Sinks
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Solution Overview
Problem
Current laser diodes for automotive lamp modules have complex structures and large heat sinks, making them unsuitable for vehicles due to size and heat dissipation issues.
Innovation Solution
A compact automotive lamp module design featuring a laser diode with a substrate, upper and lower heat sinks, and a phosphor system, where the substrate includes copper-plated heat conduction layers and heat transfer holes to efficiently dissipate heat, and the phosphor holder and collimator are integrated with the heat sinks to simplify the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If laser diodes are used for automotive lamp modules, then the light source can be compact and efficient, but the heat sinks become large in size and the structure becomes complicated
Solution Approach 1:
The heat dissipation system is divided into two separate heat sinks: an upper heat sink and a lower heat sink. Each heat sink is attached to a different side of the substrate, allowing heat to be dissipated from both the top and bottom surfaces of the laser diode assembly, effectively reducing the volume of each individual heat sink while maintaining overall heat dissipation performance
Solution Approach 2:
Heat dissipation is extended from a single-plane approach to a three-dimensional approach by utilizing both the upper and lower surfaces of the substrate. The lower heat sink is attached to the bottom surface while the upper heat sink is attached to the top surface, creating a dual-directional heat dissipation pathway that reduces the footprint and volume requirements
2Volume of moving object
If laser diodes are used for automotive lamp modules, then the light source can be compact, but the structure becomes complicated and difficult to use for vehicles
Solution Approach 1:
The upper heat sink and lower heat sink are merged into a unified heat dissipation system that works together to manage thermal load. The two heat sinks are positioned on opposite sides of the substrate and work in conjunction to provide efficient heat dissipation while maintaining a compact overall structure suitable for automotive applications
Solution Approach 2:
The substrate serves multiple functions: it provides mechanical support for the laser diode, acts as an electrical connection medium through copper plating, and serves as a thermal conduction path between the upper and lower heat sinks. This multi-functionality reduces the need for additional components and simplifies the overall structure
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 simplifies the configuration, achieves a compact size, and effectively dissipates heat generated by the laser diode, enhancing its suitability for automotive use by improving heat transfer between the upper and lower heat sinks.
Implementation Method 1
the substrate includes copper-plated heat conduction layers and heat transfer holes to efficiently dissipate heat
Implementation Method 2
upper and lower heat sinks, where the substrate includes copper-plated heat conduction layers and heat transfer holes to efficiently dissipate heat
Data Source
AI summary
An automotive lamp module includes a laser diode, a substrate with the laser diode on the top, a lower heat sink coupled to the bottom of the substrate, an upper heat sink coupled to the top of the substrate and having a light channel disposed through the upper heat sink and in which the laser diode is inserted, and a phosphor disposed in the light channel. Accordingly, it is possible to provide a simple configuration and a compact size and to effectively dissipate heat generated from the laser diode.