Modular LED Driver Circuit Thermal Management
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Solution Overview
Problem
Existing LED lighting systems for vehicles and industrial applications face challenges in cost optimization, thermal management, and complexity in wiring and control, particularly due to the need for extensive software development and validation for each lighting function, as well as high costs and complexity in interconnections and thermal management.
Innovation Solution
The implementation of a satellite driver circuit with communication and feedback circuitry that uses a two-wire communication bus protocol, allowing for modular, scalable control of LED lighting functions, reducing the need for intermediate controllers and simplifying wiring by distributing thermal loads across multiple driver circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a single intermediate controller is used to control all LED lighting functions, then centralized control is achieved, but device complexity and wiring complexity increase
Solution Approach 1:
The patent divides the LED lighting control system into multiple independent satellite driver circuits, each responsible for specific LED groups. This segmentation eliminates the need for a single complex intermediate controller and reduces wiring complexity by localizing control functions at the LED driver level, while still maintaining coordinated control through the controller's ability to address specific satellite circuits.
2Adaptability or versatility
If extensive software development is performed for each lighting function, then comprehensive lighting control is achieved, but development cost and time increase
Solution Approach 1:
Each satellite driver circuit contains built-in non-volatile memory that stores configuration data for different lighting functions. When the controller sends a function identifier, the satellite driver autonomously retrieves the corresponding configuration from its memory and executes the lighting function without requiring extensive software development or validation for each function, significantly reducing development time and cost.
3Extent of automation
If multiple LED lighting functions are concentrated in one controller, then all functions are controlled centrally, but thermal management becomes difficult
Solution Approach 1:
The patent distributes multiple LED lighting functions across multiple independent satellite driver circuits rather than concentrating them in one controller. Each satellite driver handles specific lighting functions locally, dispersing the thermal load across multiple separate components. This segmentation enables better thermal management by preventing heat concentration in a single location while maintaining coordinated control through the controller's ability to address specific satellites.
4Temperature
If modular satellite driver circuits are used for specific lighting functions, then thermal management and adaptability improve, but device complexity increases
Solution Approach 1:
The satellite driver circuits are designed with universal functionality through built-in non-volatile memory that stores configuration data for multiple different lighting functions. Each satellite can be reconfigured to perform different lighting functions by receiving function identifiers from the controller, eliminating the need for multiple specialized circuits. This multi-functionality reduces overall system complexity while maintaining thermal management benefits and adaptability.
Data Source
AI summary
This disclosure describes techniques to control LED lighting systems using a circuit that includes communication, control and LED driver circuitry specific to a limited number of particular lighting functions. The circuit may communicate via a standard communication bus protocol and include feedback, protection and sensing circuitry to monitor the lighting functions and LED performance. The circuit may be small enough to be included as part of a lighting assembly, such as a vehicle headlight assembly. The included feedback and monitoring circuitry that may be physically close the driven LEDs may simplify the wiring when compared to other techniques. A configuration process for the circuit may further simplify the wiring connections, as well as reduce the development and manufacturing costs for lighting systems that may use the circuit. Limiting the lighting functions of each circuit may improve thermal management by distributing the thermal load.