Motor Vehicle LED Control Circuit for Low-Current Signaling
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Solution Overview
Problem
Existing devices for controlling LED sets in motor vehicles fail to efficiently manage low currents required for signaling functions and have a large footprint, making them inefficient and bulky.
Innovation Solution
A compact control device with an electrical power source capable of delivering distinct power levels and a switching module that connects LED sets in parallel or series to manage different lighting and signaling functions, along with an electric current regulation module for adjusting power levels, ensuring compliance with regulatory standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a known device with modulating means and multiplexing means is used to control LED sets, then distinct electrical power levels can be delivered to different LED sets, but the device becomes bulky and cannot efficiently control low currents required for signaling functions
Solution Approach 1:
The patent combines the power source and control functions into a single integrated device. The power source is connected in parallel to multiple LED sets, and the control module integrates switching and regulation functions that were previously separate components. This merging eliminates the need for separate modulating means and multiplexing means, reducing device size while maintaining the ability to deliver distinct power levels and control low currents for signaling functions.
Solution Approach 2:
The control module is designed to universally control multiple LED sets with different functions (lighting and signaling) using a single device. It can switch between different connection configurations (series/parallel) and regulate current for both high-power lighting and low-power signaling functions, replacing the need for specialized separate control circuits.
2Adaptability or versatility
If multiple LED sets with different lighting functions are controlled separately, then each function can be optimized, but the device complexity and footprint increase
Solution Approach 1:
The control module dynamically switches between different connection configurations (series and parallel connections) of LED sets based on the required function. For signaling functions, it configures for low current; for lighting functions, it configures for higher power. This dynamic reconfiguration allows a single control architecture to adapt to multiple functions without requiring separate dedicated circuits for each function.
Solution Approach 2:
The control architecture segments the control of different LED sets through distinct switching paths within a unified control module. The module can independently control each LED set by activating specific switching elements, allowing separate optimization of each function (lighting/signaling) while maintaining a compact integrated structure rather than requiring completely separate control systems.
Data Source
Figure 1
AI summary
The invention relates to a control device for a plurality of LED assemblies, particularly for a motor vehicle, the plurality of LED assemblies comprising at least a first assembly (11) associated with at least a first lighting and/or signaling function and a second assembly (12) associated with at least a second and a third function. The control device comprises: -an electrical power source (3) capable of being connected, particularly in parallel, to the first assembly (11) and the second assembly (12) of LEDs and of delivering at least two distinct electrical power levels adapted respectively for the first and second lighting and/or signaling functions;- a switching module (7) capable of being connected, in particular in series, with the first set (11) of LEDs and of switching between a first position, in particular open, in which only the second set (12) of LEDs is supplied with electrical power, and a second position, in particular closed, in which the first set (11) and the second set (12) of LEDs are simultaneously supplied with electrical power; and - a current regulation module (5) capable of being connected, in particular in series, with the second set (12) of LEDs and of switching between a regulation position to adjust a third level of electrical power suitable for a third lighting and/or signaling function and a short-circuit position.