LED Driver Standby Power via Dual-Output Flyback
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Solution Overview
Problem
Existing LED control systems face challenges in efficiently regulating voltage and current to prevent light generation without requiring additional switches or secondary power supplies, leading to potential shutdowns of control circuits.
Innovation Solution
A single-stage power converter system that includes a flyback converter and a controller unit, which adjusts the output voltage or current below the light generation threshold of LEDs, allowing for non-light generation modes while maintaining sufficient power to prevent control circuit shutdowns, using a dimmer interface to switch between regulation parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If voltage is regulated below the light generation threshold of LEDs, then light generation is prevented, but control circuits may shut down due to insufficient power
Solution Approach 1:
The patent segments the power conversion function into two distinct output paths: one for the LED load and another for the control circuitry. This is achieved through a dual-output power converter that can independently regulate power delivery to LEDs and control circuits, allowing voltage to be reduced below LED threshold while maintaining sufficient voltage for control circuit operation.
Solution Approach 2:
The patent introduces an intermediary power conversion stage with dual outputs that acts as a mediator between the input power source and the two different load requirements. This intermediary converter transforms the input power into two separate regulated outputs: one for LED driving and another for control circuitry, resolving the conflict between low voltage for LEDs and sufficient voltage for control circuits.
2Reliability
If additional switches or secondary power supplies are added to prevent control circuit shutdown, then control circuit reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of LED power conversion and control circuit power supply into a single dual-output power converter. This integrated approach combines what would traditionally require separate power supplies and control switches into one unified device, reducing overall system complexity while maintaining control circuit reliability during dimming operations.
Solution Approach 2:
The power converter is designed with multi-functionality, serving both as the LED driver and the control circuit power supply simultaneously. This universal device can regulate power to two different loads with different voltage requirements, eliminating the need for dedicated secondary power supplies and reducing device complexity.
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 efficient control of LED light generation by reducing the risk of control circuit shutdowns and eliminating the need for additional power supplies, maintaining system efficiency and cost-effectiveness.
Implementation Method 1
flyback converters and buck-boost converters, in some examples, may regulate the current or voltage of the power output with a single magnetic and switching element
Data Source
AI summary
Methods, devices, and circuits are disclosed for regulating a first parameter of one or more LEDs. The methods, devices, and circuits further disclose switching, in response to an indication of a dimmer interface, from regulating the first parameter of the one or more LEDs to regulating a second parameter below a light generation threshold of the one or more LEDs, wherein switching from regulating the first parameter to regulating the second parameter causes the one or more LEDs to enter a non-light generation mode.