LED Driver Circuit With Dynamic Voltage Adjustment
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Solution Overview
Problem
Conventional LED driver circuits experience limited driving functions due to lower driving output voltage and power, which restricts the performance of LED lighting systems.
Innovation Solution
The LED driver circuit incorporates a first voltage drop module, a constant current driving module, an auxiliary winding module, a second voltage drop module, a DIP switch module, and a control module to regulate current levels and optimize voltage, ensuring constant output power by selecting predetermined current levels and outputting pulse signals to control the driving module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional LED driver circuits use constant current output with limited voltage, then LED apparatus can be driven, but driving power is significantly limited due to lower output voltage
Solution Approach 1:
The patent implements dynamic voltage adjustment capability where the driver circuit can adaptively change output voltage levels based on LED string configuration. The system transitions from fixed voltage to dynamically adjustable voltage, enabling the driver to match different LED forward voltage requirements while maintaining constant current output, thus resolving the contradiction between limited driving power and driving versatility.
Solution Approach 2:
The patent changes the electrical parameters of the driver circuit by introducing adjustable voltage output capability alongside constant current output. By modifying the output characteristics from fixed to variable parameters, the system can accommodate different LED apparatus configurations and power requirements, thereby improving both driving power and adaptability simultaneously.
2Power
If driver output voltage is increased to improve driving power, then driving function is enhanced, but system complexity increases due to additional control requirements
Solution Approach 1:
The patent designs a driver circuit that performs multiple functions within a single system: both constant current regulation and adjustable voltage output. This multi-functional approach allows the circuit to handle different LED configurations without requiring separate dedicated circuits, thereby enhancing driving power while controlling the increase in system complexity through functional integration.
Solution Approach 2:
The patent segments the control functionality into distinct modules: one for constant current regulation and another for voltage adjustment. This modular segmentation allows independent optimization of each function and simplifies the overall control architecture, enabling enhanced driving power without proportionally increasing system complexity.
3Reliability
If constant current output is maintained for LED driving, then LED operation is stable, but output voltage is limited which restricts driving capability
Solution Approach 1:
The patent introduces dynamic voltage adjustment capability that works in conjunction with constant current output. The system maintains stable LED operation through constant current while dynamically adapting voltage levels to match different LED string configurations, thereby resolving the contradiction between operational stability and driving capability.
Solution Approach 2:
The patent modifies the output parameters by enabling variable voltage output while maintaining constant current. This parameter change allows the driver to provide both the stability required for reliable LED operation and the voltage flexibility needed for enhanced driving power and 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
This configuration allows for the regulation of various current levels to drive different types of LED apparatuses, maintaining constant output power and alleviating the limitations imposed by lower driving output voltage and power, thereby enhancing the operational capabilities of LED lighting systems.
Implementation Method 1
a first voltage drop module (102), connected to a power source (101), for converting a direct current voltage
Implementation Method 2
a second voltage drop module (105), connected to the first voltage drop module (102), for bucking the converted direct current voltage to output an optimized voltage
Implementation Method 3
an auxiliary winding module (108), connected to the first voltage drop module (102) and the constant current driving module (103), for receiving the converted direct current voltage to output an actual voltage level for driving
Data Source
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AI summary
A LED driver circuit includes a first voltage drop module, a constant current driving module, a second voltage drop module, a DIP switch module, an auxiliary winding module, a control module and a loading module. The loading module is driven by converting a direct current voltage. The converted direct current voltage is additionally bucked to generate an optimized voltage that powers the DIP switch module and the control module. The DIP switch module selects a level of a predetermined current and in turn outputs an electrical signal to the control module. Therefore, the control module outputs a corresponding pulse signal for regulating a current passing through the loading module. Meanwhile, the control module calculates a required voltage level for driving. And the control module compares the required voltage level with an actual voltage value output by the auxiliary winding module and then determines the working status of the loading module.