LED Bulb Thermal Management and Assembly

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Solution Overview

Problem

Existing LED light bulbs face challenges in efficient thermal management, high production costs, and aesthetic limitations due to inefficient heatsinks and labor-intensive assembly processes, which hinder their adoption in mass production and compatibility with incandescent bulb form factors.

Innovation Solution

The use of high-volume consumer electronic assembly processes, state-of-the-art materials, and innovative heatsink and thermal management techniques, along with mechanical and optical orientations of LEDs, facilitates robotic assembly, enhanced thermal performance, and automated testing, while minimizing parts count and incorporating wireless communication capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional LED assembly methods are used, then manufacturing flexibility is maintained, but assembly complexity increases and productivity decreases

Engineering Contradiction:

Improveassembly speedVSAvoidassembly complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The LED bulb is divided into modular sub-assemblies: a LED module sub-assembly containing multiple LEDs mounted on a PCB, a heatsink sub-assembly with thermal management components, and a driver circuit sub-assembly. These segmented modules can be independently manufactured and then quickly assembled together, reducing overall assembly complexity and increasing productivity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The PCB serves multiple functions simultaneously: it provides electrical connections for the LEDs, mechanical support structure, and thermal management interface. The heatsink collar performs both thermal dissipation and structural support roles. This multi-functionality reduces the number of separate components needed, simplifying assembly while maintaining high productivity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of manufacture

If multiple separate PCBs are used for LED mounting and driver electronics, then functional integration is improved, but assembly complexity and manufacturing cost increase

Engineering Contradiction:

Improvemanufacturing costVSAvoidPCB integration

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The LED mounting PCB and driver electronics PCB are merged into a single integrated PCB assembly. The LED modules are mounted directly on the same PCB that contains the driver circuitry, eliminating the need for complex inter-substrate wiring and reducing the number of assembly steps. This integration lowers manufacturing cost while maintaining functional separation through careful circuit design.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If simple insulated attachment wires are used for interconnection, then assembly simplicity is maintained, but reliability and productivity decrease

Engineering Contradiction:

Improveconnection reliabilityVSAvoidassembly efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The traditional mechanical wire attachment method is replaced with direct soldered or reflow-mounted electrical connections between the LED modules and the integrated PCB. This substitution eliminates the need for separate insulated wires and connection hardware, improving both reliability through more robust electrical bonds and productivity through faster assembly operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 results in LED bulbs with improved thermal efficiency, reduced production costs, and a design that mimics the appearance and illumination pattern of incandescent bulbs, enabling mass production and increased adoption.

Implementation Method 1

semiconductor light emitting diode (LED) based lights have been introduced

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Implementation Method 2

expensive and complex thermal management components required to dissipate the heat generated

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS10670196B2LED light bulb construction and manufacture

Publication Date: 2020.06.02 SMARTBOTICS

AI summary

An LED light bulb with integrated power supply, and which may incorporate integrated communications and processing functions. The LED light bulb is designed to be efficiently manufactured in mass quantities using automated assembly techniques, and is constructed to exhibit the spatial light pattern of a regular incandescent bulb as closely as possible. Where communications and processing functions are integrated, the LED light bulb is able to communicate via wireless communications to a mobile phone, notebook, tablet, or other computing device.