Driver Circuit Dynamic Current Regulation for LED Efficiency
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Solution Overview
Problem
Existing driver circuits for electrical loads, such as LEDs, face inefficiencies due to constant current regulation, which does not account for changing supply voltage and load characteristics over time, leading to suboptimal performance and power consumption.
Innovation Solution
A driver circuit with a control circuit that dynamically adjusts target current values for a current regulator based on signals from the regulator, allowing for varying current values over time to maintain a stable supply voltage, thereby optimizing efficiency and power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant current regulation is used, then the electrical load operates reliably, but the power consumption increases and efficiency decreases
Solution Approach 1:
The patent applies dynamics by transitioning from constant current regulation to dynamic current adjustment. The control circuit continuously adapts the target current value based on feedback signals from the electrical load, allowing the system to respond to changing conditions (temperature drift, aging effects) and optimize power consumption while maintaining operational reliability.
Solution Approach 2:
The patent implements feedback by using a control circuit that monitors signals from the electrical load and adjusts the target current value accordingly. This closed-loop control enables the system to detect changes in load characteristics and modify the current regulation to reduce power consumption while maintaining reliable operation.
2Device complexity
If constant current value is maintained, then the control is simple, but the efficiency is suboptimal due to changing load characteristics
Solution Approach 1:
The patent applies dynamics by implementing adaptive current regulation that adjusts the target current value based on feedback signals. This dynamic approach allows the system to optimize efficiency in response to changing load characteristics (temperature drift, aging) while maintaining manageable control complexity through systematic control circuit design.
Solution Approach 2:
The patent changes the current parameter dynamically by adjusting the target current value based on feedback signals. This parameter adaptation allows the system to optimize efficiency under varying operating conditions while the control circuit manages the complexity of implementing these changes.
3Use of energy by moving object
If the target current value is adjusted dynamically, then the efficiency increases, but the control circuit complexity increases
Solution Approach 1:
The patent uses feedback to justify the increased control circuit complexity. By implementing a control circuit that monitors load signals and adjusts the target current value dynamically, the system achieves improved efficiency while the complexity is concentrated in the control logic that processes feedback and generates appropriate current adjustments.
Solution Approach 2:
The patent applies self-service by enabling the control circuit to automatically adjust the target current value based on feedback signals from the load. This self-regulating mechanism improves efficiency without requiring external intervention, and the control circuit's complexity is offset by the automated nature of the adjustment process.
4Use of energy by moving object
If gradual optimization of supply voltage is performed, then the power consumption is reduced, but the control precision requirements increase
Solution Approach 1:
The patent applies periodic action by implementing gradual optimization of the supply voltage through stepwise adjustments of the target current value. This periodic adjustment approach reduces power consumption while managing control precision requirements by making controlled, incremental changes rather than abrupt modifications.
Solution Approach 2:
The patent changes the supply voltage parameter gradually through dynamic adjustment of the target current value. This parameter optimization reduces power consumption while the systematic approach to voltage adjustment manages the precision requirements by implementing controlled changes based on feedback signals.
Data Source
AI summary
A driver circuit (11) for a current regulator (13), which can be coupled in series to an electrical load (14), comprises a control circuit (12) for controlling the current regulator (13). The control circuit (12) is designed to determine at least two target current values (SW1) for the current regulator current (IS1) of the current regulator (13) for at least two points in time in an operation phase on the basis of a signal (VS1, STR) that can be tapped at the current regulator (13).