LED Fixture Integrated Driver Optical Chamber Heat Management
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Solution Overview
Problem
Current solid state lighting fixtures, particularly dome lights, are not designed to accommodate LED lamps efficiently, leading to premature failure due to inadequate heat dissipation, and there is a need for energy-efficient, lightweight, and easily installable LED fixtures that can replace traditional incandescent and fluorescent lighting in various applications, including ceiling and wall recesses.
Innovation Solution
A solid state lighting fixture with an integrated driver circuit housed in a compact optical chamber, featuring a reflective cone to minimize heat absorption and a detachable junction box for easy installation and maintenance, allowing for efficient heat management and compatibility with phase-cut dimming signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED lamps are installed in conventional solid state lighting fixtures, then energy efficiency is improved, but heat dissipation becomes inadequate leading to premature failure
Solution Approach 1:
The driver circuit is extracted from the traditional separate location and integrated into the optical chamber where it can be directly cooled by the LED heat dissipation structure, while the LED array is separated into a modular configuration that optimizes heat flow paths to the heat sink
Solution Approach 2:
The driver circuit and LED array are merged into a single integrated housing with shared thermal management infrastructure, allowing the driver circuit to benefit from the LED heat dissipation system while reducing overall fixture complexity and material usage
2Weight of stationary object
If driver circuit and LEDs are integrated within the optical chamber, then fixture size and weight are reduced, but heat management becomes more challenging
Solution Approach 1:
The housing is designed with differentiated thermal zones: the optical chamber provides a controlled environment for the driver circuit with moderate heat exposure, while the LED array zone is directly coupled to the heat sink for aggressive heat extraction, with each zone optimized for its specific thermal requirements
Solution Approach 2:
The driver circuit is nested within the optical chamber which itself is nested within the outer housing, creating concentric thermal management layers where the innermost components experience the most controlled thermal environment while outer layers provide progressive heat dissipation
3Ease of operation
If conventional fixtures are used with LED lamps, then installation is simple, but access difficulties and high change-out costs persist
Solution Approach 1:
The fixture is segmented into modular components: the housing with integrated driver circuit can be installed as a complete unit, while the LED array is provided as a separate replaceable module, allowing simple installation of the main fixture and easy replacement of only the LED array when needed
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 a lightweight, energy-efficient, and easily installable LED fixture with extended operational lifetime, reduced material and installation costs, and enhanced safety by integrating the driver circuit and LEDs within the optical chamber, while maintaining compatibility with existing dimming systems.
Implementation Method 1
A reflective cone fits within the optical chamber such that it covers most of the drive circuit and other components
Data Source
AI summary
A solid state lighting fixture with an integrated driver circuit. A housing has a base end and an open end through which light is emitted from the fixture. The reflective interior surface of the fixture and the base define an optical chamber. At least one, and often multiple, light sources are mounted at the fixture base along with the circuitry necessary to drive and/or control the light sources. The drive circuit and the light sources are both located in the optical chamber. A reflective cone fits within the optical chamber such that it covers most of the drive circuit and other components at the base of fixture that might absorb light. The reflective cone is shaped to define a hole that is aligned with the light sources so that light may be emitted through the hole toward the open end of the fixture.