LED Control Device Hybrid Digital-Analog Signal Conversion
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Solution Overview
Problem
Existing LED control systems face challenges in flexibility and scalability, particularly in avoiding high-frequency flicker and achieving efficient control of LED lights with varying luminous designs and modular structures.
Innovation Solution
A hybrid control system combining a current controller and digital-analog converter generates digital control signals that are converted to analog signals using a voltage divider or R2R network, allowing for flexible and efficient control of LED lights, avoiding high-frequency flicker and enabling precise regulation of high currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital control signals are used to control LED lights, then control precision and flexibility are improved, but high-frequency flicker occurs causing disturbing artifacts in light radiation
Solution Approach 1:
The patent introduces an analog signal as an intermediary between the digital control signal and the LED driver. The digital-to-analog converter transforms discrete digital values into continuous analog voltages, which then control the LED current smoothly. This intermediary analog stage eliminates the high-frequency switching effects that cause flicker, while preserving the precision benefits of digital control through the DAC conversion process.
2Adaptability or versatility
If modular LED light structures are used, then adaptability and scalability are improved, but control system complexity increases
Solution Approach 1:
The patent implements a universal control architecture where a single controller with digital-to-analog conversion capability can manage multiple modular LED light units. The controller generates analog control signals that can be distributed to various modules, each with its own LED driver. This universal approach allows the system to adapt to different modular configurations without requiring complex specialized control circuits for each module, thereby maintaining simplicity while achieving high adaptability.
3Measurement precision
If high currents are regulated precisely, then LED light output control is improved, but system complexity and component requirements increase
Solution Approach 1:
The patent replaces complex mechanical or purely electronic current regulation mechanisms with an analog voltage control system. By using digital-to-analog conversion followed by analog voltage control of the LED driver, the system achieves precise high current regulation through continuous analog signal modulation rather than discrete switching or complex feedback circuits. This substitution simplifies the overall system architecture while maintaining high precision current control capability.
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 hybrid control system provides flexible and efficient control of LED lights, reducing flicker and enabling precise regulation of high currents, while allowing for scalable and modular designs that can accommodate both high-voltage and low-voltage LEDs.
Implementation Method 1
A circuit of the voltage divider and low pass first or higher order offers an easy -to -implementing solution to implement digital information signals into analog signals. An R2R network also offers an easy-to-implementing solution for digital-to-analog implementation.
Data Source
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Figure 3~5
AI summary
A control device (20) for LED light sources of a luminaire (10) comprises a first light source module (23a) which includes one or more first LED light sources (17a). Furthermore, the control device (20) comprises a first voltage regulator (27a) arranged in the first light source module (23a), which is connected in series with the one or more first LED light sources (17a).Furthermore, the control device (20) has a control signal generator (24) which is designed to generate a digital light source control signal (C) and provide it at a generator output, and a first digital-to-analog converter (26a) which is coupled between the generator output of the control signal generator (24) and a control input of the first voltage regulator (27a) and is designed to convert the digital light source control signal (C) of the control signal generator (24) into an analog light source control signal (Ta) and feed it into the control input of the first voltage regulator (27a).