Smooth LED PAR Lamp Thermal Design
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Solution Overview
Problem
LED PAR lamps require heat dissipating features to prevent overheating, but incorporating these features alters the appearance, which may not be desirable.
Innovation Solution
A smooth-surfaced LED PAR lamp design with a thermally conductive base plate and body that conceals the electrical module, combined with a transparent optic holder to disperse light without visible fins or ridges, maintaining a sleek appearance while effectively dissipating heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat dissipating features such as fins are incorporated into the PAR lamp design, then heat dissipation efficiency is improved, but the aesthetic appearance deteriorates
Solution Approach 1:
The patent applies a smooth outer shell or cover that conceals the internal finned heat dissipation structure. This thin film/shell approach allows the heat sink to maintain its functional finned geometry internally while presenting a smooth, aesthetically pleasing external surface that does not compromise the lamp's appearance.
Solution Approach 2:
The heat dissipation system is segmented into two distinct parts: an internal finned structure for efficient heat dissipation and an external smooth cover for aesthetic purposes. This segmentation allows each component to optimize its specific function without compromising the other.
2Shape
If a smooth surface design is used to maintain aesthetic appearance, then aesthetic appeal is improved, but heat dissipation capability deteriorates
Solution Approach 1:
A smooth outer shell or cover is implemented as a thin film structure that does not significantly impede heat transfer. This shell conceals the internal heat dissipation features while maintaining aesthetic appearance, and its thin nature minimizes thermal resistance.
Solution Approach 2:
The smooth outer shell acts as an intermediary element between the internal heat-generating LED components and the external environment. It provides aesthetic coverage while allowing heat to pass through via conduction and convection mechanisms.
3Temperature
If heat sink fins surround the optic at the surface, then heat dissipation is improved, but the smooth surface design is compromised
Solution Approach 1:
The heat dissipation structure is segmented into an internal portion that can include fins near the LED source, and an external smooth surface portion that covers the optic area. This allows heat dissipation functionality to be maintained without compromising the smooth surface appearance at the optic surface.
Solution Approach 2:
The heat sink fins are nested within the lamp housing interior, positioned between the LED assembly and the smooth outer surface. This nesting arrangement allows the fins to perform heat dissipation functions without protruding to the external surface where they would compromise the smooth appearance.
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 design ensures efficient heat dissipation without compromising the aesthetic appeal of the lamp, maintaining high performance and longevity of the LEDs while maintaining a smooth, unobstructed surface.
Implementation Method 1
A smooth-surfaced LED PAR lamp design with a thermally conductive base plate and body that conceals the electrical module
Implementation Method 2
an optic configured to disperse light generated by the LED assembly
Implementation Method 3
The transparent optic holder has an outer circumference substantially equal to a circumference of the first end of the lamp body
Data Source
AI summary
An LED lamp includes an LED assembly including a plurality of LEDs. The LED lamp includes a circular base plate in thermal communication with the LED assembly. The LED lamp includes an electrical module electrically coupled to the LED assembly and configured to supply power to the LED assembly. The LED lamp includes a lamp body coupled to and in thermal communication with the base plate at a first end and concealing at least a portion of the electrical module at a second end. The lamp body includes a substantially smooth surface extending from the base plate to the electrical module. The Led lamp includes an optic configured to disperse light generated by the LED assembly.