Solid State Lamp Heat Sink with Segmented Fins
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Solution Overview
Problem
There is a need for high-efficiency solid-state light sources that combine the benefits of solid-state light emitters, such as long life and energy efficiency, with acceptable color temperature and good color rendering index, while also providing a wide gamut and simple control circuitry, and can be easily substituted for conventional incandescent or fluorescent lamps.
Innovation Solution
The development of solid-state light emitter lamps that include one or more solid-state light emitters, with effective heat dissipation mechanisms to maintain efficiency and stability, and are designed to fit standard lamp sockets, providing a lumen output of at least 600 lumens and a Color Rendering Index (CRI) of 70 or higher, while maintaining a stable color output and efficient thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If solid state light emitters are used to improve energy efficiency and lifetime, then energy consumption is reduced and operational life is extended, but heat dissipation becomes a critical challenge affecting stability and efficiency
Solution Approach 1:
The heat sink is divided into multiple fins that segment the heat dissipation surface, increasing the total surface area for heat transfer to the surrounding air. This segmentation allows more efficient heat dissipation from the solid state light emitter without requiring active cooling systems.
Solution Approach 2:
The heat dissipation problem is solved by transitioning from a simple block structure to a three-dimensional fin array structure. The fins extend in multiple directions from the base, creating a spatial distribution of heat transfer surfaces that maximizes exposure to ambient air for passive convection cooling.
2Duration of action of stationary object
If solid state light emitters are used to extend operational lifetime, then lifetime is improved, but heat management complexity increases
Solution Approach 1:
The heat sink structure enables passive self-cooling of the solid state light emitter through natural convection. The fin design allows air to flow through and around the structure, carrying away heat without requiring fans, pumps, or active thermal management systems, thus maintaining simplicity while extending lifetime.
3Reliability
If heat dissipation structures are added to maintain efficiency, then thermal management is improved, but device complexity and size increase
Solution Approach 1:
The heat sink structure serves multiple functions: it provides mechanical support for the solid state light emitter, acts as a thermal conduction path from the emitter to the surrounding air, and creates passive convection currents through its fin geometry. This multi-functionality reduces the need for separate cooling components, maintaining structural simplicity.
4Device complexity
If passive heat dissipation is used to avoid active cooling, then device complexity is reduced, but heat dissipation capacity is limited
Solution Approach 1:
The heat dissipation surface is segmented into multiple fins that increase the total surface area available for heat transfer. This segmentation allows passive convection to achieve higher heat dissipation capacity by maximizing the interface between the heat sink and ambient air without adding active cooling components.
Solution Approach 2:
The fins are designed with curved surfaces that optimize airflow patterns and enhance natural convection. The curvature promotes turbulent flow and increases the effectiveness of passive heat dissipation, allowing the structure to dissipate more heat without requiring active cooling systems.
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
These lamps achieve high efficiency and long operational life, maintaining at least 70% of their initial wall plug efficiency for 25,000 hours, with a CRI of 90 or higher, and are capable of directing light omnidirectionally, making them suitable replacements for conventional lamps without the need for active cooling.
Implementation Method 1
at least a first heat dissipation element thermally coupled to the at least one solid state emitter
Implementation Method 2
at least one solid state light emitter mounted on the heat dissipation element
Data Source
AI summary
A lamp comprising a solid state light emitter, the lamp being an A lamp and providing a wall plug efficiency of at least 90 lumens per watt. Also, a lamp comprising a solid state light emitter and a power supply, the emitter being mounted on a heat dissipation element, the dissipation element being spaced from the power supply. Also, a lamp, comprising a solid state light emitter and a heat dissipation element that has a heat dissipation chamber, whereby an ambient medium can enter the chamber, pass through the chamber, and exit. Also, a lamp, comprising a light emissive housing at least one solid state lighting emitter and a first heat dissipation element.