Pivotable Vehicle Lamp Module With Eccentric Heatsink Fins
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Solution Overview
Problem
The integration of lighting modules with heat sinks in motor vehicle lamps is challenging due to the increased volume required for effective heat dissipation, making it difficult to pivot the modules in a compact space, especially when multiple modules are needed to dynamically light different parts of a scene.
Innovation Solution
A lighting module design featuring a heat dissipating part with a series of fins that decrease in length from the center to the periphery, including beveled edges, allowing for efficient heat dissipation while reducing the overall size, enabling the module to pivot within a smaller space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipating part is added to the lighting module, then heat dissipation efficiency is improved, but the overall volume of the lighting module increases
Solution Approach 1:
The dissipation member is integrated within the housing structure of the lighting module, with fins that extend into the internal space of the housing rather than adding external volume. This nesting approach allows the heat dissipation structure to occupy space that would otherwise be empty, achieving effective heat dissipation without increasing the overall envelope dimensions of the module.
Solution Approach 2:
The dissipation member utilizes the third dimension (depth) by extending fins from the base toward the opposite wall of the housing. Instead of expanding the heat dissipation surface area in the plane of the base, the fins project perpendicular to the base into the available depth space, effectively using vertical space for heat dissipation without increasing the module's footprint or overall volume.
2Adaptability or versatility
If the lighting module is made mobile to light different parts of the scene, then lighting versatility is improved, but the space required for pivoting increases
Solution Approach 1:
The dissipation member is positioned and sized to nest within the housing boundaries, allowing the entire lighting module to pivot within a compact arc. The fins are arranged to clear the pivot axis and not interfere with the rotation path, enabling the module to change lighting directions without requiring excessive clearance space around the pivot point.
Solution Approach 2:
The lighting module is designed with a pivot mechanism that allows dynamic repositioning of the entire assembly including the dissipation member. The dissipation member's geometry is optimized to accommodate rotational movement, with fins that maintain effective heat dissipation surface area across different angular positions while minimizing the sweep volume required during pivoting.
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 design facilitates the integration of the lighting module into a compact lamp housing by minimizing the necessary space for pivoting, allowing for effective heat dissipation and maintaining the module's operational efficiency without increasing the lamp's size.
Implementation Method 1
a heatsink configured to dissipate heat generated by the light source
Implementation Method 2
a dissipation member comprising a series of fins projecting from the base, each fin being defined by a summit that extends at a distance from the base
Data Source
AI summary
A lighting module includes at least one heatsink configured to dissipate heat generated by a light source, the heatsink including at least a base and a dissipation member, the dissipation member including a series of fins projecting from the base, each fin being defined by a summit that defines the length of that fin, and by two end edges extending between the summit and the base. The lighting module is configured to pivot about two pivot axes, and the series of fins includes eccentric fins the length of which is less than the lengths of the fins at the centre of the dissipation member, at least one fin further having at least one bevel at the junction between the summit and an end edge.