Light Module Linear Regulator Current Peak Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light modules for motor vehicle lighting devices face challenges in managing current peaks and power losses due to the bridging of semiconductor light sources, which can lead to damage and inefficiency, especially when controlling multiple light sources simultaneously.
Innovation Solution
A light module with series-connected semiconductor light sources and a linear regulator that adjusts resistance based on the closing process of switching units, allowing for coordinated control to limit or eliminate current peaks and reduce power losses, without the need for additional specialized control units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If switching units are used to bridge semiconductor light sources individually, then light effects and dimming can be controlled, but current peaks occur during switching that can damage light sources
Solution Approach 1:
The linear regulator proactively increases its resistance before the switching units close, creating a preliminary counter-action that prevents current peaks from occurring in the first place. This anticipatory measure opposes the harmful effect before it can manifest, rather than reacting after the damage risk has materialized.
Solution Approach 2:
The control unit determines the closing process of switching units in advance and pre-adjusts the linear regulator's resistance accordingly. This preliminary action ensures the protective resistance is already in place before the switching event occurs, eliminating the need for reactive damage control.
2Ease of operation
If switching units close simultaneously to control multiple light sources, then coordination is achieved, but power losses in the linear regulator increase
Solution Approach 1:
The linear regulator's resistance is made dynamically adjustable based on the switching state. Rather than maintaining a fixed high resistance to prevent all current peaks, the system adapts the resistance level in real-time according to which switching units are closed, optimizing the balance between protection and energy efficiency.
Solution Approach 2:
The resistance parameter of the linear regulator is changed as a function of the closing process. By varying this key parameter according to the switching configuration, the system achieves coordinated control of multiple light sources while minimizing unnecessary power dissipation in the regulator.
3Reliability
If additional control units are added to manage current peaks, then light source protection is improved, but device complexity increases
Solution Approach 1:
The linear regulator is given a dual function: it continues to perform its primary voltage regulation role while simultaneously serving as a protective element against current peaks through its adjustable resistance. This multi-functionality eliminates the need for separate protective devices, reducing overall system complexity.
Solution Approach 2:
The protective function against current peaks is merged into the existing linear regulator component rather than being implemented as a separate control unit. By combining these functions in a single element, the system achieves enhanced reliability without increasing device complexity.
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 solution effectively manages current peaks and reduces power losses by coordinating the closing process of switching units, ensuring stable operation and extended lifespan of semiconductor light sources while maintaining high output capacity.
Implementation Method 1
A resistance of the linear regulator can be increased as a function of the closing process
Implementation Method 2
reduce the power loss of the linear regulator
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A light module (106) for a lighting device (101) of a motor vehicle is proposed, comprising series-connected semiconductor light sources that can be bridged by means of a respective switching unit. A linear regulator is connected in series with the semiconductor light sources. The closing process of one or more switching units can be detected. The resistance of the linear regulator can be increased depending on the closing process.