LED Lamp Chimney Design for Heat Dissipation and Light Distribution
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Solution Overview
Problem
Incandescent and halogen bulbs are energy-inefficient, have short lifetimes, produce excessive heat, and collect water, dirt, and insects, leading to electrical issues, while solid state emitters like LEDs lack sufficient light distribution and are not considered for quality lighting applications due to these limitations.
Innovation Solution
A design featuring a central chimney with reflectors that direct light from LEDs to a distant area, preventing water, dirt, and insect collection, and incorporating cooling features to extend LED lifespan, with options for faceted or diffuser reflectors to enhance light efficiency and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If incandescent and halogen bulbs are used for lighting, then sufficient light output is achieved, but energy efficiency deteriorates and excessive heat is produced
Solution Approach 1:
The patent transitions from incandescent/halogen to LED technology, fundamentally changing the operating parameters of the light source. LEDs operate at lower temperatures and higher energy efficiency by using electroluminescence instead of thermal radiation, directly resolving the contradiction between sufficient light output and energy efficiency
Solution Approach 2:
The patent replaces the thermal-mechanical system of incandescent bulbs with a solid-state electronic system using LEDs. This substitution eliminates the need for heating elements and filament mechanics, achieving superior energy efficiency and reduced heat production while maintaining adequate illumination
2Duration of action of moving object
If incandescent and fluorescent light bulbs are used, then lighting function is provided, but lifetime deteriorates compared to solid state emitters
Solution Approach 1:
The patent acknowledges that traditional bulbs are short-lived and requires frequent replacement, which is problematic in hard-to-reach areas. By adopting LED technology with significantly extended lifetime (50,000+ hours), the system eliminates the need for frequent maintenance and replacement, improving reliability in challenging installation environments
3Reliability
If previous lamp designs with flat plate housing are used, then simple structure is achieved, but water and dirt collection occurs leading to electrical shorts
Solution Approach 1:
The patent divides the housing into multiple functional sections: a waterproof outer housing, an internal reflector assembly, and a sealed LED mounting section. This segmentation allows each component to be optimized for its specific function while maintaining overall electrical safety and preventing water/dirt accumulation in critical areas
Solution Approach 2:
The patent introduces a reflector as an intermediary element between the LED light source and the external environment. The reflector not only directs light but also creates a sealed barrier that prevents water and dirt from reaching electrical components, maintaining reliability without significantly increasing overall device complexity
4Use of energy by moving object
If solid state emitters like LEDs are used, then energy efficiency and lifetime are improved, but light distribution to distant areas deteriorates
Solution Approach 1:
The patent uses a parabolic reflector geometry that transforms the point-source LED emission into a directional beam. By shaping the reflector surface according to parabolic geometry, light rays are redirected along parallel paths, extending illumination distance and improving light distribution in the desired direction while maintaining LED energy efficiency
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 provides efficient, long-lasting, and safe lighting with reduced heat and power consumption, comparable to or exceeding traditional lighting systems, while ensuring reliable operation in challenging environments like large buildings.
Implementation Method 1
A reflector is attached to each side piece, and a plurality of LEDs are attached to each side piece, such that the light emitting portion of the LED faces the reflector. The reflector directs light emitted from each LEDs in the direction of the desired area.
Implementation Method 2
The design, including the central chimney, cools the area of the LEDs and extends their lifetime.
Data Source
AI summary
A device for illuminating a space comprising is discussed. In one variation, the device includes: a central body portion, with a length and a width, and including two plates running along the length of the central body portion wherein the two plates are separated by a spacer; an opening for the removal of heat during operation of the device that extends along a portion of the length of the central body portion, a light emitting diode on the central body portion; a reflector, extending from the central body portion, for reflecting light emitted by the light emitting diode towards the illuminated space. Other variations are also discussed as are methods for using suitable variations for retrofitting existing non-light emitting diode light sources.