LED Retrofit Kit with Alignment Bracket for Recessed Can Fixtures
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Solution Overview
Problem
Existing recessed can downlight fixtures are not easily retrofittable with LED technology, as they require costly overhauls and are incompatible with the large installed base of incandescent or fluorescent fixtures, and LED bulbs often have lower light output and require complex, costly replacements.
Innovation Solution
A universal LED-based retrofit kit with modularized LED light sources and control electronics, a discrete driver module, and an alignment bracket for easy installation, allowing for efficient upgrading of various RCD fixtures without discarding existing components, and incorporating thermal feedback for power control and a diffuser assembly for light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED-based downlights are used for new construction, then energy efficiency and lifetime are improved, but compatibility with existing RCD fixtures is lost and system overhaul cost increases
Solution Approach 1:
The LED lighting system is divided into separate functional modules: LED light sources, driver electronics, heat sink, and adapter components. This segmentation allows the LED module to be retrofitted into existing RCD fixtures without replacing the entire fixture assembly, maintaining compatibility while achieving energy efficiency improvements
Solution Approach 2:
The adapter component is designed with universal features including adjustable socket positioning, multiple mounting configuration options, and compatibility with various RCD trim ring types. This universality enables a single LED module design to fit diverse existing fixtures, resolving the compatibility issue
2Use of energy by moving object
If LED bulbs are used to replace incandescent bulbs, then energy consumption is reduced, but light output decreases and operating temperature increases
Solution Approach 1:
Multiple LED light sources are combined within a single module and optically integrated to achieve cumulative light output that matches or exceeds that of traditional incandescent bulbs. The merged LED array compensates for individual LED lower luminous output while maintaining low energy consumption
Solution Approach 2:
A reflective housing and diffuser assembly are introduced as intermediary optical elements between the LED sources and the environment. These components redirect and distribute light to maximize illumination output and achieve uniform light distribution comparable to traditional bulbs
3Use of energy by moving object
If LED bulbs are used to replace incandescent bulbs, then energy efficiency is improved, but heat management becomes more critical and complex
Solution Approach 1:
The heat sink is extracted as a separate, dedicated thermal management component with high surface area and optimized heat dissipation features. By isolating the heat management function from the light-emitting function, the design effectively manages LED operating temperatures without compromising energy efficiency
Solution Approach 2:
The LED light sources are nested within the heat sink structure, which provides both mechanical support and thermal management. This nested arrangement allows efficient heat transfer from the LED junctions to the heat sink while maintaining a compact overall form factor
4Loss of time
If a universal LED retrofit kit is used, then installation time is reduced and waste is minimized, but the device must accommodate many different fixture types
Solution Approach 1:
The adapter component incorporates locally adjustable features such as movable sockets, adjustable spacers, and configurable mounting points. These localized adjustments allow the universal adapter to accommodate specific fixture dimensions and configurations without requiring a completely different design for each fixture type
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
Enables quick and efficient retrofitting of a wide range of RCD fixtures with improved LED performance, maintaining desired illumination levels and extending the life of lighting systems while reducing waste and costs.
Implementation Method 1
a heat sink disposed on a top surface of the substrate opposite the bottom surface
Implementation Method 2
a plurality of fins extending away from the substrate
Implementation Method 3
a lighting module comprising one or more LEDs
Implementation Method 4
one or more LEDs arranged in a rectilinear array
Implementation Method 5
a reflective housing disposed in the fixture
Data Source
AI summary
In various embodiments, a downlight illumination device is upgraded to an illumination device based on one or more light-emitting diodes (LEDs) via a retrofit kit that includes (i) a lighting module comprising one or more LEDs, (ii) a driver module comprising circuitry for receiving power from the power source and supplying compatible power to the one or more LEDs, (iii) a flexible conduit connecting the lighting module to the driver module and containing therewithin a plurality of wires electrically connecting the lighting module to the driver module, and (iv) an alignment bracket for attachment within the housing and configured to receive the lighting module.