LED Strip Light Engine for CFL Retrofit Thermal Management
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Solution Overview
Problem
Current LED-based CFLs produce excessive heat, requiring large heat sinks that increase weight, cost, and can impair lighting performance, while also being costly and difficult to produce.
Innovation Solution
A transparent tube-based illumination device with a light engine comprising one or more LEDs disposed on the inner wall, which acts as a cooling surface, eliminating or reducing the need for additional heat sinks, and featuring a flexible strip design for improved thermal performance and production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large heat sink is used to conduct heat from LED-based CFL, then thermal performance is improved, but weight, cost, and device complexity increase
Solution Approach 1:
The patent merges the heat dissipation function into the transparent tube structure itself by positioning the light engine at the inner wall, eliminating the need for a separate heat sink. The tube's outer surface serves as the cooling surface, combining structural and thermal management functions into a single component.
Solution Approach 2:
The invention extracts the heat dissipation function from a separate heat sink component and integrates it directly into the tube structure. By positioning the light engine at the inner wall, the tube's outer surface becomes the cooling surface, removing the need for an additional heat sink component.
2Temperature
If a large heat sink is used to conduct heat from LED-based CFL, then thermal performance is improved, but device complexity and production cost increase
Solution Approach 1:
The patent merges the heat dissipation function into the transparent tube structure itself by positioning the light engine at the inner wall, eliminating the need for a separate heat sink. The tube's outer surface serves as the cooling surface, combining structural and thermal management functions into a single component.
Solution Approach 2:
The invention extracts the heat dissipation function from a separate heat sink component and integrates it directly into the tube structure. By positioning the light engine at the inner wall, the tube's outer surface becomes the cooling surface, removing the need for an additional heat sink component.
3Temperature
If a large heat sink is used to conduct heat from LED-based CFL, then thermal performance is improved, but lighting performance is impaired
Solution Approach 1:
The patent segments the tube wall into distinct functional zones: the inner wall surface serves as the light emission surface where the light engine is positioned, while the outer wall surface serves as the cooling surface for heat dissipation. This segmentation allows both lighting and thermal management functions to operate optimally without interfering with each other.
Solution Approach 2:
The invention applies local quality by giving different parts of the tube different functions: the inner wall area is optimized for light emission and transmission, while the outer wall area is optimized for heat dissipation. This localized functional differentiation enables both excellent lighting performance and effective thermal management.
4Use of energy by moving object
If traditional CFL is replaced by LED-based CFL, then energy efficiency is improved, but heat generation increases
Solution Approach 1:
The patent converts the harmful heat generation of LED-based CFL into a beneficial feature by using the tube's outer surface as a heat dissipation surface. The same transparent tube that provides structural support and light transmission also serves as an effective heat sink, turning the heat problem into a design advantage.
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 enhances thermal performance, reduces production costs, and allows for better lighting characteristics and design flexibility, including omnidirectional light emission without mechanical interruptions, while maintaining low energy consumption.
Implementation Method 1
a light engine comprising one or more light emitting diodes
Implementation Method 2
the light engine is disposed at the inner wall of the transparent tube... heat from the light engine may be directly transferred to the tube
Data Source
AI summary
An LED illumination device corresponds to a compact fluorescent lamp and has improved thermal properties. The illumination device includes a transparent tube having an inner wall defining a cavity, a light engine having one or more light emitting diodes, and a driver to drive the light engine. The light engine is disposed at the inner wall of the transparent tube. The arrangement of the light engine and the one or more light emitting diodes at the inner wall of the tube provides improved lighting characteristics. Simultaneously, an improved cooling is provided by the interface surface for conducting heat between the inner wall and the light engine.