Self-Identifying SST Modules for Adaptive LED Driver Current
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Solution Overview
Problem
Existing LED luminaire systems require multiple drivers with varying voltage and current outputs to match different configurations, increasing manufacturing costs due to the complexity of intelligent drivers needed to recognize and adjust to changes in LED module quantities and types.
Innovation Solution
The implementation of self-identifying solid-state transducer (SST) modules with sense resistors that allow a constant current controller to automatically adjust current output based on the number of modules connected, eliminating the need for multiple drivers by using a single driver type that adapts to different configurations through the measurement of sense resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple drivers with varying voltage and current outputs are used to match different LED module configurations, then the system can accommodate various configurations, but the device complexity and manufacturing cost increase due to the need for intelligent drivers
Solution Approach 1:
The LED module includes an identification circuit that automatically identifies the module type and communicates this information to the driver. The driver then automatically adjusts its output parameters based on the identified module type, eliminating the need for manual configuration or complex switching circuits. This self-identifying mechanism allows a single driver design to serve multiple configuration types.
Solution Approach 2:
The system implements a feedback mechanism where the identification circuit in the LED module provides information about the module configuration to the driver. The driver uses this feedback information to automatically adjust its operating parameters, creating a closed-loop system that adapts to different configurations without requiring complex pre-programming or manual intervention.
2Adaptability or versatility
If intelligent drivers with switching circuits are implemented to recognize and adjust to LED module changes, then the system can adapt to configuration changes, but the manufacturing cost increases
Solution Approach 1:
The identification circuit is integrated into the LED module itself, allowing the module to automatically provide configuration information to the driver. This shifts the intelligence from the driver to the module, enabling a simpler, more cost-effective driver design that can still adapt to different configurations through the module's self-identification capability.
Solution Approach 2:
The identification circuit serves multiple functions: it identifies the LED module type, communicates configuration information to the driver, and enables the driver to automatically adjust its output. This multi-functional approach eliminates the need for separate identification and control circuits, reducing overall system complexity and manufacturing cost.
3Ease of manufacture
If a single driver type is used for all configurations, then manufacturing cost is reduced, but the system cannot accommodate different LED module configurations without modifications
Solution Approach 1:
The LED module's identification circuit automatically detects and communicates the module configuration to the driver. This self-identifying capability allows a standardized, single-type driver to adapt to different LED module configurations without requiring driver modifications, maintaining both manufacturing simplicity and configuration flexibility.
Solution Approach 2:
The driver dynamically adjusts its output parameters based on real-time feedback from the identification circuit. This dynamic adaptation allows a single driver design to serve multiple static configurations, achieving versatility without compromising manufacturing simplicity.
Data Source
AI summary
Self-identifying solid-state transducer (SST) modules and associated systems and methods are disclosed herein. In several embodiments, for example, an SST system can include a driver and at least one SST module electrically coupled to the driver. Each SST module can include an SST and a sense resistor. The sense resistors of each SST module can have at least substantially similar resistance values. The SSTs of the SST modules can be coupled in parallel across an SST channel to the driver, and the sense resistors of the SST modules can be coupled in parallel across a sense channel to the driver. The driver can be configured to measure a sense resistance across the sense resistors and deliver a current across the SSTs based on the sense resistance.