LED Driver Circuit With Memory-Based Identification

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Solution Overview

Problem

Existing LED lighting systems require complex circuits with multiple components for proper operation, including rectifiers, PFC circuits, galvanic isolation, and constant current sources, leading to increased complexity and potential inefficiencies.

Innovation Solution

A modular LED operating circuit with a lamp management module that includes a constant current source, featuring a control unit capable of reading identification data from memory to determine operating parameters for LEDs, allowing for flexible and efficient operation of LED lines with galvanic isolation and power factor correction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple circuit blocks (rectifier, PFC, galvanic isolation, constant current source) are used for proper LED operation, then the LED system achieves reliable and efficient operation, but the circuit complexity increases significantly

Engineering Contradiction:

ImproveLED operation reliabilityVSAvoidcircuit complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple circuit blocks (rectifier, PFC circuit, galvanic isolation, and constant current source) into a single integrated LED driver circuit. This integration maintains all necessary functions for reliable LED operation while reducing the overall system complexity and component count compared to separate discrete blocks.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The LED driver circuit is designed as a multi-functional universal circuit that performs rectification, power factor correction, galvanic isolation, and constant current regulation simultaneously. This universal design allows a single circuit to fulfill multiple roles that traditionally required separate dedicated circuits.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If a modular design with independent control of LED channels is implemented, then the system flexibility and efficiency are enhanced, but the device complexity increases

Engineering Contradiction:

Improvesystem flexibilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The LED lighting system is divided into multiple independently controllable LED channels or modules. Each channel can be controlled separately through individual constant current sources, allowing flexible dimming, coloring, and operational patterns while maintaining a manageable modular architecture.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP2548408B1LED illumination system with a memory for operation data

Publication Date: 2019.01.02 TRIDONIC AG

Figure 1~2
Figure 3a~4
Figure 5~6a

AI summary

The invention relates to an LED operating circuit in which a second module (2), preferably a light management module, with an additional sub-module (C), preferably a constant flow source, supplies an LED module (F) which has one or more LED sections (8). A control unit (E) of the second module (2) is embodied such that it can access a memory (4) of the second module (2) in order to read an identification of the LED-module (F) or to read the contents stored in the memory (4).