Retrofittable LED Headlamp Assembly With Heat Pipe Cooling
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Solution Overview
Problem
Conventional halogen bulbs in vehicle headlights are inefficient, prone to frequent replacement due to damage from vibrations, and LED bulbs face overheating issues due to poor heat dissipation, leading to design incompatibilities that prevent their widespread use in existing reflectors and holders.
Innovation Solution
A LED headlamp assembly with a J-shaped heat pipe, thermally conductive holder, metal core PCB, and thermal interface materials for efficient heat dissipation, allowing retrofitting onto existing incandescent bulb reflectors without size increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional headlamp assembly with separate bulb housing and reflector is used, then the headlamp can be manufactured using traditional methods, but the headlamp cannot be integrated with the vehicle body and lacks aesthetic integration
Solution Approach 1:
The patent merges the headlamp assembly with the vehicle body by integrating the bulb housing directly into the body structure. The bulb housing includes a front wall that forms part of the vehicle body contour, eliminating the need for separate mounting brackets or housings. This integration allows the headlamp to be aesthetically blended with the vehicle design while maintaining functional separation of components.
Solution Approach 2:
The bulb housing serves multiple functions: it provides structural support for the bulb and reflector, forms part of the vehicle body aesthetic contour, and integrates lighting elements (daytime running lights, turn signals, main beams) into a unified assembly. This multi-functionality reduces the number of separate parts needed while achieving both structural and cosmetic integration with the vehicle.
2Ease of operation
If a complex multi-component headlamp assembly is used, then various lighting functions can be achieved, but the headlamp cannot be easily removed and replaced
Solution Approach 1:
The headlamp assembly is segmented into a modular unit that can be easily detached from the vehicle body. The bulb housing is designed as a self-contained module that includes all lighting components (bulb, reflector, lenses, daytime running lights, turn signals) pre-assembled together. This segmentation allows the entire lighting assembly to be removed and replaced as a single unit, greatly simplifying maintenance and replacement operations.
3Shape
If traditional headlamp design is used, then manufacturing is straightforward, but the headlamp lacks aesthetic integration and modern design flexibility
Solution Approach 1:
The bulb housing front wall is designed with specific local aesthetic qualities that match the vehicle body style. Different regions of the headlamp assembly can have different finishes, contours, and design elements tailored to the specific vehicle model's aesthetic requirements. This allows customization of the headlamp's appearance to match various vehicle designs while using standardized manufacturing processes for the core components.
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 enables effective heat dissipation, prolongs LED lifespan, and allows easy retrofitting, reducing maintenance costs and increasing LED headlamp adoption by preventing overheating and maintaining light pattern compatibility.
Implementation Method 1
a reflector (142) positioned behind the bulb (130) and configured to reflect light from the bulb (130) toward the front of the headlamp assembly (100)
Implementation Method 2
a lens (144) positioned in front of the bulb (130) and configured to transmit light from the bulb (130)
Data Source
Figure 1a~1b
Figure 2
Figure 3
AI summary
The present subject matter relates to a headlamp assembly (104) that includes a circuit board assembly (202, 204) comprising a printed circuit board and a plurality of LEDs (206a-d) secured to the printed circuit board. A holder (208) may be used to secure the circuit board assembly (202, 204). A heat pipe (214a, 214b) may be coupled to the holder (208) and at least one heat sink (212) may be coupled to the heat pipe (214a, 214b) and the holder (208). The heat pipe (214a, 214b) may conduct heat generated by the plurality of LEDs (206a- d) to the holder (208) and to the heat sink (212) to dissipate the heat. The headlamp assembly may be retrofittable to a reflector (102).