Programmable LED PWM Dimming Controller for Wiring Reduction
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Solution Overview
Problem
Conventional LED lighting systems require complex wiring and separate dimming controller panels, leading to high costs and limitations in using LEDs of different types and capacities without matching drivers, as the maximum current driving LEDs is fixed by the driver's type and capacity.
Innovation Solution
A programmable LED current PWM dimming controller integrates a light dimming control front panel with a PWM dimming module, featuring a trim pot or selector with a constant current DC-DC buck converter for adjustable current, automatic voltage compliance, and protection mechanisms, allowing for flexible use of LEDs with different capacities and types, and reducing wiring complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate dimming controller panel is used to control PWM dimming, then dimming control functionality is achieved, but wiring complexity and installation cost increase
Solution Approach 1:
The patent integrates the dimming control panel and PWM dimming module into a single unified unit. The control panel directly interfaces with the PWM module through integrated circuitry, eliminating the need for separate wiring connections between independent components. This merging reduces wiring complexity while maintaining full dimming control functionality.
Solution Approach 2:
The integrated unit serves multiple functions: it provides both the user interface for dimming control and the PWM signal generation in one device. This multi-functional design eliminates the need for separate dedicated dimming controller panels, reducing overall system complexity and installation requirements.
2Reliability
If LED driver power supply is designed with fixed maximum current output, then power supply stability is ensured, but adaptability to different LED types and capacities is reduced
Solution Approach 1:
The patent introduces programmable current control that allows the LED driver's maximum current output to be dynamically adjusted through software configuration. The trim pot or digital selector enables the system to adapt its current output to match different LED types and capacities while maintaining stable power supply operation. This dynamic adjustability resolves the contradiction between fixed stability and flexible adaptability.
Solution Approach 2:
The system allows changing the electrical parameters (maximum current output) of the LED driver through programmable control. By modifying the current parameter via trim pot adjustment or digital selection, the same power supply can safely drive different LED configurations without requiring hardware redesign, thus achieving both stability and versatility.
3Adaptability or versatility
If trim pot or selector is added to adjust maximum LED feeding current, then current adaptability is improved, but device complexity increases
Solution Approach 1:
The patent offers a digital selector option that replaces traditional mechanical trim pots with electronic digital control. This substitution reduces mechanical complexity while maintaining current adjustability functionality. The digital selector integrates with the programmable control system, allowing current adaptation through software configuration rather than manual mechanical adjustment.
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 integrated system simplifies installation, reduces costs by eliminating separate components, and enables adjustable brightness control across various LED types and capacities, while providing efficient power management and protection features.
Implementation Method 1
a constant current DC-DC buck converter for stepping down the maximum LED feeding current
Implementation Method 2
The average value of current fed to the load LEDs is controlled by turning a switch between the power input and load on and off at a fast pace. The longer the switch is on compared to the off periods, the higher the current supplied to the load is.
Data Source
AI summary
An integrated system for supplying direct current and brightness dimming for light emitting diodes (LEDs) comprising: an LED driver power supply for supplying a constant direct current; an array of one or more LEDs; and an integrated programmable LED current pulse width modulation (PWM) dimming controller; wherein the integrated programmable LED current pulse width modulation (PWM) dimming controller comprising: a front control panel for controlling the brightness of the array of one or more LEDs; and an LED current PWM dimming module.