LED Power Supply Dynamic Regulation for Dimming Frequency
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Solution Overview
Problem
Existing LED power supply systems face challenges in efficiently regulating power consumption while maintaining sufficient voltage for LED strings, often sacrificing cost or design complexity, and struggle with rapid dimming frequency and electromagnetic interference.
Innovation Solution
An LED power supply system that includes a power converter and an LED regulator, which monitors LED voltages and generates a regulation voltage to adjust the power voltage based on thresholds, allowing for efficient power management by increasing, decreasing, or maintaining the voltage as needed, and combining feedback paths to optimize power conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If typical LED regulation schemes (constant-current, constant-voltage, or combination) are used, then cost or design simplicity may be improved, but dimming frequency becomes slower and power efficiency decreases
Solution Approach 1:
The patent implements a dynamic regulation system that transitions from static constant-current or constant-voltage schemes to an adaptive system. The LED driver circuit dynamically adjusts operating parameters based on real-time feedback from voltage monitoring and threshold comparisons, enabling rapid dimming responses while maintaining circuit simplicity through standardized components configured for dynamic operation.
Solution Approach 2:
The patent introduces feedback mechanisms by monitoring LED string voltages and comparing them against predetermined thresholds. This feedback loop enables the regulation circuit to respond dynamically to changing conditions, achieving high dimming frequencies without increasing overall system complexity. The feedback-driven approach allows the system to adapt its regulation strategy based on actual LED operating states.
2Device complexity
If typical LED regulation schemes are used, then design simplicity or cost may be improved, but power consumption efficiency decreases
Solution Approach 1:
The patent employs parameter changes by monitoring LED string voltages and comparing them against predetermined thresholds to dynamically adjust regulation parameters. This approach enables efficient power consumption by adapting the regulation strategy to actual operating conditions rather than using fixed parameters. The system changes operational parameters based on real-time voltage measurements, achieving high efficiency without requiring complex circuit designs.
3Power
If LED power voltage is increased to provide sufficient power for each LED string, then illumination performance is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by providing different power voltage levels to different LED strings based on their individual requirements. Rather than uniformly increasing power to all LED strings, the system monitors each string's voltage and provides additional power only where necessary to meet illumination requirements. This localized approach ensures sufficient power delivery to individual LED strings while minimizing overall power consumption across the entire system.
Data Source
AI summary
One aspect of the present invention includes a light-emitting diode (LED) power supply system. The system includes an LED regulator configured to monitor at least one LED voltage associated with a respective at least one activated LED string and to generate an LED regulation voltage based on the at least one LED voltage relative to an LED power voltage that provides power to the at least one activated LED string. The system also includes a power converter configured to generate the LED power voltage and to regulate the LED power voltage based on the LED regulation voltage.