Vehicle LED Lighting Module with Conductive Framed Support

Solution Overview

Problem

Existing vehicle lighting devices with rotating LED modules face challenges in compactly and efficiently dissipating heat, as traditional finned dissipating elements interfere with moving parts and increase bulk, while smaller alternatives fail to maintain low temperatures, leading to decreased LED efficiency.

Innovation Solution

A compact, cost-effective lighting device design featuring a heat conductive metal or metal alloy framed support that transfers thermal flows from LEDs, eliminating the need for traditional dissipators and maintaining efficient temperature management through conduction and radiation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If traditional finned dissipating elements are used, then heat dissipation capability is improved, but the lighting module bulk increases and interferes with moving parts

Engineering Contradiction:

ImproveLED temperatureVSAvoidlighting module bulk

Core Design Contradiction:

TemperatureVSVolume of stationary object

Solution Approach 1:

The patent merges the support structure and heat dissipation function into a single integrated component. The framed support is made of heat conductive material that directly contacts the LED, combining structural support and thermal management functions, thereby eliminating the need for separate finned dissipators and reducing overall module bulk.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The framed support serves multiple functions simultaneously: it provides mechanical support for the LED and optical components, acts as a heat conduction path, and serves as a mounting structure. This multi-functionality eliminates the need for dedicated heat dissipation components that would increase bulk.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If traditional finned dissipating elements are used, then heat dissipation capability is improved, but the device complexity increases

Engineering Contradiction:

ImproveLED temperatureVSAvoidlighting module construction

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The support structure and heat dissipation function are merged into a single component. The framed support made of heat conductive material directly contacts the LED, combining structural support and thermal management functions, thereby eliminating the need for separate finned dissipators and reducing overall module bulk.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The framed support serves multiple functions simultaneously: it provides mechanical support for the LED and optical components, acts as a heat conduction path, and serves as a mounting structure. This multi-functionality eliminates the need for dedicated heat dissipation components that would increase complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Volume of stationary object

If smaller dissipating elements are used, then the lighting module bulk is reduced, but the LED temperature cannot be maintained at sufficiently low values

Engineering Contradiction:

Improvelighting module bulkVSAvoidLED temperature

Core Design Contradiction:

Volume of stationary objectVSTemperature

Solution Approach 1:

The support structure and heat dissipation function are merged into a single component. The framed support made of heat conductive material directly contacts the LED, combining structural support and thermal management functions, thereby eliminating the need for separate finned dissipators and reducing overall module bulk.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The framed support structure itself provides the heat dissipation function through its heat conductive material. The support serves itself by conducting heat away from the LED without requiring additional dedicated cooling components, achieving both compact size and effective thermal management.

Inventive Principle:

Principle #25Self-service

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 ensures optimal heat dissipation, maintaining LED efficiency with temperatures below 60°C near the LEDs and 40°C at the support's bottom, achieving a reliable and compact lighting module.

Implementation Method 1

a heat conductive metal or metal alloy framed support (4) holding rigid in a fixed position the at least one first light source (6) and bearing in idling manner the at least one first reflector (7)

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

The solution ensures optimal heat dissipation, maintaining LED efficiency with temperatures below 60°C near the LEDs and 40°C at the support's bottom

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Data Source

PatentEP3354971B1Lighting device for vehicles provided with LED lighting modules

Publication Date: 2021.06.30 PSA AUTOMOBILES SA

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Figure 3~4

AI summary

Rotating lighting module (5) designed to equip a lighting device (1) for vehicles, including at least one first LED light source (6), at least one first reflector (7) and at least one first actuator (8) to rotate the first reflector relative to the first LED light; wherein a framed support (4) holds rigid in a fixed position the at least one first LED light source (6) and bears in idling manner said first reflector (7); the at least one first LED light source (6) being operatively associated with the framed support in such a manner to transfer thereto by heat conduction at least a major part of a thermal flow (F) generated in operation by the first LED light source; and the framed support (4) being made entirely of a heat conductive metal or metal alloy and being designed to behave as a thermal dissipator.