LED Driver Circuit Dynamic Matrix Reconfiguration
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Solution Overview
Problem
Existing driver circuits for LED light sources face challenges in minimizing power absorption during voltage variations, particularly when transitioning between different matrix arrangements, leading to inefficiencies and flickering issues, especially in automotive lighting applications where varying light intensities are required.
Innovation Solution
The driver circuit divides LEDs into groups connected through regulation circuits and an actuation circuit, allowing dynamic switching between parallel and serial configurations based on voltage differences, eliminating the need for pre-defined voltage thresholds and optimizing power usage by transitioning through a stable intermediate stage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the driver circuit uses a first matrix arrangement with more columns to operate at lower power supply voltage, then the light sources can emit light at lower voltage without flickering, but the electric power consumption increases
Solution Approach 1:
The patent implements dynamic reconfiguration of LED matrix arrangements, allowing the system to switch between different column configurations (first matrix with more columns, second matrix with fewer columns) based on operating conditions. This dynamic adaptation enables the circuit to optimize between voltage requirements and power consumption in real-time, rather than being locked into a fixed configuration.
Solution Approach 2:
The invention changes the structural parameter of the LED matrix (number of columns in each arrangement) to optimize performance. By varying the matrix configuration parameters based on power supply voltage conditions, the system achieves efficient operation across different voltage levels while controlling power consumption.
2Adaptability or versatility
If the driver circuit transitions between different matrix arrangements, then the power supply voltage requirements can be adjusted, but abrupt power absorption changes occur during transition
Solution Approach 1:
The patent prepares both first and second matrix arrangements to be ready simultaneously before transition is needed. The actuation circuit pre-configures the switching mechanism so that when voltage conditions change, the transition between matrix arrangements can occur smoothly without abrupt power absorption changes, as the switching infrastructure is already in place.
Solution Approach 2:
The actuation circuit serves as an intermediary between the power supply voltage variations and the LED matrix configurations. It mediates the transition process by controlling the switching between different matrix arrangements, ensuring that power absorption changes are gradual and controlled rather than abrupt.
3Device complexity
If the driver circuit uses a fixed matrix arrangement, then the circuit design is simpler, but it cannot optimize power consumption across varying voltage conditions
Solution Approach 1:
The patent segments the LED matrix into multiple independent arrangements (first matrix with more columns, second matrix with fewer columns) that can be selectively activated. This segmentation allows the system to choose the appropriate configuration for current operating conditions, optimizing power consumption while maintaining manageable circuit complexity through modular design.
Data Source
AI summary
Driver circuit of light sources, particularly of the LED type, comprising a first and at least a second group of light sources, each connected to a common power supply terminal, a first and at least a second regulation circuit, each suitable for regulating the current absorbed by a respective group of light sources, at least one actuation circuit operatively connected to a respective second regulation circuit, and a serial connection circuit, suitable for connecting in series at least a first and a second group of light sources, when the voltage downstream of the first group of light sources is greater than or equal to the voltage upstream of the second group of light sources.