LED Driver Assembly Thermal Management via Selective Potting

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Solution Overview

Problem

Existing LED illuminating devices face issues with heat management, as traditional methods for thermal dissipation, such as potting materials or thermally conductive plastics, are costly and inefficient, particularly for electronic components with poor heat resistance, leading to reduced performance and service lifetime.

Innovation Solution

A driver assembly design where a potting material is used to thermally connect only the portions of the driver with lower heat resistance to the housing, minimizing material usage and cost, while the higher heat resistance components rely on the housing's thermal dissipation properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If the driver is wholly potted with traditional potting material, then thermal dissipation is achieved, but manufacturing cost increases due to unnecessary material usage

Engineering Contradiction:
Improvethermal dissipationVSAvoidpotting material waste
Core Design Contradiction:
TemperatureVSLoss of substance

Solution Approach 1:

The patent applies local quality by differentiating the thermal management approach for different regions of the driver. High-power LED modules requiring thermal dissipation are potted with thermally conductive material, while low-power modules are not potted. This selective approach ensures adequate thermal dissipation where needed while avoiding unnecessary material usage and cost increase in other areas.

Inventive Principle:
Principle #3Local quality

2Temperature

If thermally conductive plastic is used to manufacture the driver housing, then thermal dissipation is improved, but manufacturing cost increases significantly

Engineering Contradiction:
Improvethermal dissipationVSAvoidmanufacturing cost
Core Design Contradiction:
TemperatureVSEase of manufacture

Solution Approach 1:

The patent segments the driver into different functional regions based on thermal dissipation requirements. Instead of using expensive thermally conductive plastic for the entire driver housing, the invention identifies specific high-power LED modules that require thermal dissipation and applies potting material only to those segments. This segmentation approach maintains effective thermal dissipation for critical components while using cost-effective materials for the rest of the structure.

Inventive Principle:
Principle #1Segmentation

3Loss of substance

If selective coating or potting is applied to electronic devices, then cost is reduced, but process control difficulty increases and consistency is hard to achieve

Engineering Contradiction:
Improvematerial costVSAvoidprocess consistency
Core Design Contradiction:
Loss of substanceVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by establishing clear objective criteria for identifying high-power LED modules that require thermal dissipation. The selection is based on measurable parameters such as power consumption and heat generation characteristics. This parameter-based approach simplifies the selective potting process by providing objective decision rules, thereby reducing process control difficulty and improving manufacturing consistency while maintaining cost effectiveness.

Inventive Principle:
Principle #35Parameter changes

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 approach effectively manages heat dissipation for electronic modules with low heat resistance, reducing manufacturing costs and extending the service life of LED illuminating devices without compromising thermal performance.

Implementation Method 1

a potting material is potted into the first cavity to envelop the first portion... the portion such as specific electronic module that has a low heat resistance is thermally connected with the driver housing via a small amount of potting material

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS9392716B2Driver assembly and method for manufacturing the same
Publication Date: 2016.07.12 LEDVANCE GMBH
  • US9392716B2 patent drawing
  • US9392716B2 patent drawing
  • US9392716B2 patent drawing

AI summary

A driver assembly includes a driver housing and a driver, the driver including at least one first portion and a second portion, the first portion having a lower heat resistance than the second portion, wherein the driver housing includes at least one first cavity for at least partially accommodating the first portion and a second cavity for accommodating the second portion, and a potting material is potted into the first cavity to envelop the first portion.