Resonant Driver Circuit for LED Efficiency
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Solution Overview
Problem
Existing lighting technologies, such as incandescent bulbs, CFLs, and LEDs, still suffer from inefficiencies that result in significant heat production due to suboptimal power conversion, limiting their luminous efficacy and requiring phase-out periods for new devices to be adopted.
Innovation Solution
A high-frequency driving circuit that generates pulses at frequencies of at least 50,000 Hz, often near the resonant frequency of the lighting device, combined with a low duty cycle, to enhance the efficiency of lighting devices, allowing them to operate at significantly reduced current and power consumption compared to manufacturer specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional lighting technologies (incandescent, CFL, LED) are used, then lighting devices can produce visible light, but they suffer from low luminous efficacy and significant heat production due to suboptimal power conversion
Solution Approach 1:
The patent applies parameter changes by operating the lighting device at a resonant frequency (e.g., 50,000 Hz to 500,000 Hz) rather than standard frequencies. This frequency parameter change enables the lighting device to operate at peak efficiency, converting power to light with minimal heat loss and achieving luminous efficacy significantly higher than conventional operation modes
Solution Approach 2:
The patent employs periodic action by using high-frequency pulsing (resonant frequency oscillation) to drive the lighting device. The oscillator generates periodic signals that cause the lighting device to operate at its resonant frequency, maximizing power conversion efficiency and minimizing energy loss to heat during each cycling period
2Use of energy by moving object
If new lighting devices are introduced to improve efficiency, then luminous efficacy increases, but a phase-out period is required for consumers to replace old bulbs
Solution Approach 1:
The patent applies dynamics by making the driving frequency adjustable rather than fixed. The oscillator can be tuned to match the resonant frequency of the lighting device, allowing existing bulbs to achieve enhanced efficiency without replacement. This dynamic adjustment capability eliminates the need for phase-out periods while maintaining compatibility with current lighting infrastructure
3Ease of operation
If existing large fluorescent lamp ballasts are used, then lighting devices can operate, but they produce a large amount of heat due to system inefficiency
Solution Approach 1:
The patent uses an intermediary approach by introducing a resonant oscillator circuit that acts as a mediator between the power source and the lighting device. This intermediary component enables the lighting device to operate at its resonant frequency, dramatically improving efficiency and reducing heat generation while maintaining compatibility with existing ballast structures
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 significantly improves the luminous efficacy of lighting devices, reducing power consumption by up to 75% and current usage by up to 1/1000 of manufacturer specifications, leading to more efficient visible light output and reduced heat production.
Implementation Method 1
the oscillator generates driving pulses at a frequency of at least 50,000 Hz, or preferably at least 100,000 Hz, or even more preferably, at least 200,000 Hz... the oscillator generates the driving pulses at a frequency that is within 5% of a resonant frequency of the lighting device
Data Source
AI summary
The inventive subject matter provides a circuit and a method for efficiently operating a lighting device, such as a light-emitting diode and a fluorescent lamp. In one aspect of the invention, the circuit includes an oscillator that generates a series of current pulses at a frequency that is at least 50,000 Hz and that corresponds to a resonant frequency of the circuit including the lighting device. The series of pulses is operated at a low duty cycle of no more than 15%. The lighting device has a manufacturer's specification for current consumption and power consumption for a specified luminosity. The circuit provides a current to the lighting device at no more than 1/500 of the manufacturer's specification to produce at least the specified luminosity. The lighting device also operates within the circuit at no more than 50% of the manufacturer's specification to produce the specified luminosity.