Modular LED Lamp With Thermoelectric Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED lighting faces thermal management issues, leading to reduced light output and shortened lifespan due to heat buildup, and existing solutions like fans and heat sinks are inefficient, especially in high-power applications.
Innovation Solution
A solid-state lamp design incorporating thermoelectric cooling systems, where a Peltier effect-based cooling device is used to manage heat, converting electrical energy into a temperature gradient to efficiently cool the LEDs, and a modular design with replaceable LED modules and passive cooling through air circulation to maintain optimal temperature and extend lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high current is used to increase LED brightness, then light output is improved, but heat generation increases which shortens LED lifespan and reduces light output efficiency
Solution Approach 1:
The patent extracts the heat management function from the LED module by introducing a separate thermoelectric cooling system. The cooling device is positioned adjacent to the LED module, creating an independent thermal management subsystem that actively removes heat without affecting the electrical performance of the LED, thereby enabling high-current operation while maintaining optimal temperature.
Solution Approach 2:
The thermoelectric cooling device acts as an intermediary between the LED module and the surrounding environment. It transfers heat from the LED junction to the ambient air through active pumping, serving as a thermal bridge that decouples the high-current electrical operation from the thermal consequences, thus protecting the LED from heat-induced degradation.
2Temperature
If conventional heat sinks and fans are used for cooling, then thermal management is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent replaces conventional mechanical cooling systems (fans, heat sinks) with a solid-state thermoelectric cooling device. This substitution eliminates moving parts and complex thermal management structures, achieving effective cooling through electrical control alone. The thermoelectric device requires no mechanical components, reducing overall system complexity while maintaining or improving cooling efficiency.
Solution Approach 2:
The cooling system transitions from passive thermal management (relying on natural convection and conduction) to active thermal control through electrical parameter adjustment. By controlling the current supplied to the thermoelectric device, the cooling intensity can be dynamically adjusted to match the LED's thermal load, providing precise temperature control without requiring oversized cooling components.
3Illumination intensity
If multiple LEDs are mounted in a defined space to increase brightness, then illumination output is improved, but heat dissipation becomes insufficient leading to thermal back-flow
Solution Approach 1:
The patent segments the thermal management function by positioning individual thermoelectric cooling devices adjacent to each LED module rather than relying on a single centralized cooling system. This distributed approach allows each LED to be cooled independently, preventing thermal accumulation in the housing and eliminating thermal back-flow effects that would occur with multiple LEDs sharing a common heat sink.
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 effectively manages heat in LED lighting, enhancing energy efficiency, extending the lifespan of LEDs, and allowing for flexible and efficient maintenance, while reducing thermal backflow and improving light distribution.
Implementation Method 1
A TEM, in a thermocooling application, converts electrical energy into a temperature gradient, known as the 'Peltier' effect. By applying a current through a TEM, a temperature gradient is created and heat is transferred from one side, the 'cold' side of the TEM to the other side, the 'hot' side.
Implementation Method 2
the thermal transfer from the LEDs through a thermally connected conventional heat spreading plate to the housing is insufficient to maintain a desirable LED temperature
Data Source
AI summary
A lamp assembly provides light in a downward direction as well as in an upward direction through the use of angled housing walls and windows in the lamp assembly housing. Modularity and sliding elements enable the lamp assembly to be easily assembled and also easily repaired. A back cover on the lamp assembly is configured such that the lamp assembly is easily installed. Lamp heat management includes active and passive elements.