LED Driver Controller Powered by Dimming Signal
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Solution Overview
Problem
Existing lamp drivers for LEDs require a power supply to convert AC utility power to variable DC power for dimming control, increasing production complexity and costs, and complicating compliance with industry standards.
Innovation Solution
A load system with a controllable load and driver, where the controller is powered by a dimming signal, allowing the driver to provide variable power to LEDs based on a control signal, reducing the need for an auxiliary power supply and simplifying the power conversion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a power supply is used to convert AC utility power to variable DC power for dimming control, then the controller can be powered reliably, but production complexity and costs increase
Solution Approach 1:
The invention extracts and eliminates the auxiliary power supply component from the system by powering the controller directly from the control signal line. This removes the AC-to-DC conversion circuitry and associated components, directly resolving the technical contradiction by sacrificing the separate power supply while maintaining controller operation through alternative power sourcing from the existing control infrastructure.
Solution Approach 2:
The control signal line is given a dual function: it not only carries the dimming control information to the driver but also powers the controller that generates the dimming signal. This multi-functionality eliminates the need for dedicated power supply circuitry while maintaining reliable controller operation, thereby reducing device complexity without compromising reliability.
2Ease of operation
If an auxiliary power supply is used for the controller, then the controller can operate independently, but production costs increase
Solution Approach 1:
The auxiliary power supply is extracted and removed from the system. The controller no longer operates independently with separate power but instead derives power from the control signal line, eliminating the power supply component and associated production costs while maintaining controller functionality.
Solution Approach 2:
The power delivery function is merged into the control signal line. The same line that carries dimming control signals also delivers power to the controller, combining two functions into a single infrastructure and eliminating the need for separate power supply circuitry, thereby reducing production costs.
3Reliability
If a power supply for AC to DC conversion is used, then the controller can be powered, but compliance with industry standards becomes more complicated
Solution Approach 1:
The AC-to-DC power conversion circuitry is extracted and eliminated from the system. By powering the controller directly from the control signal line, the invention removes the components that would require compliance with power supply standards, thereby maintaining reliable controller operation while simplifying regulatory compliance.
Data Source
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AI summary
A driver (12) is connectable to an external power supply and configured to output variable electrical power for one or more loads (L), such as LEDs. A module (18) including a microcontroller is operable to output a control signal (14) that automatically varies the electrical power outputted by the driver (12). The microcontroller is further configured to be powered by the control signal.