LED Ballast Controller for Fluorescent Fixture Retrofit
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Solution Overview
Problem
Existing fluorescent lighting fixtures with magnetic or electronic ballasts are not compatible with LED lighting devices, as they require high voltages and currents to excite gas in fluorescent tubes, which can damage LED replacements and pose disposal and safety issues with toxic materials.
Innovation Solution
A circuit device, the LED Ballast Controller, interfaces with fluorescent lighting fixtures to regulate and control AC power from magnetic or electronic ballasts, emulating the electrical characteristics of fluorescent tubes to safely operate LED lighting devices without modifying wiring or removing the ballast, using a Dynamic and Adaptive Resistive Load and Timing and Logic Circuit to manage voltage and current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LED lighting devices are directly connected to fluorescent ballasts, then LED compatibility with existing fixtures is improved, but LED devices are damaged by high voltage and current from ballasts designed for fluorescent tubes
Solution Approach 1:
The patent introduces an intermediary circuit device between the fluorescent ballast and LED lighting device. This intermediary acts as a mediator that receives high voltage AC power from the ballast, transforms it through rectification and regulation stages, and outputs safe DC power suitable for LED operation, thereby enabling compatibility without direct connection
Solution Approach 2:
The circuit device fundamentally changes the electrical parameters from the ballast output by converting high voltage AC (designed for fluorescent tubes) into regulated low voltage DC (suitable for LEDs). This parameter transformation includes voltage reduction, current regulation, and waveform conversion, allowing the LED to operate safely in fixtures originally designed for fluorescent lighting
2Duration of action of stationary object
If fluorescent tubes are used for general purpose lighting, then energy savings and longer bulb life are achieved, but toxic phosphor disposal and glass breakage risks increase
Solution Approach 1:
The patent promotes LED lighting devices as replacements for fluorescent tubes. LEDs have no toxic phosphors or fragile glass envelopes, eliminating disposal hazards and breakage risks. Although LEDs have different operational characteristics requiring the intermediary circuit, they provide a safer, non-toxic alternative that maintains long operating life without the environmental and safety problems of fluorescent technology
3Illumination intensity
If high voltage and current techniques are used to excite gas in fluorescent tubes, then fluorescent tubes can be lit, but these same techniques damage LED replacement devices
Solution Approach 1:
The circuit device dynamically adapts the electrical characteristics based on the load type. It detects whether a fluorescent tube or LED device is connected and adjusts its output accordingly, transforming the ballast's high voltage AC output into regulated DC suitable for LEDs while maintaining the ability to operate fluorescent tubes with their original high voltage excitation techniques
Data Source
AI summary
A device and method to interface with a Magnetic or Electronic Fluorescent Ballast; evaluate, process, and regulate the incoming power from the Ballast device and output a steady AC power that can be used by LED drivers, LED chips, or set of multiple LED chips in a Tube or Bulb application. This device and method will allow for a non-fluorescent replacement lighting device such as a LED Lighting Tube or Bulb to be used in a Fluorescent Light Luminaire (fixture) without any electrical wiring modification or removal of the Electronic or Magnetic Ballast.