Optoelectronic Assembly Short-Circuit Detection Circuit
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Solution Overview
Problem
Existing methods for detecting short-circuits in optoelectronic assemblies, particularly in series or parallel circuits of light-emitting diode elements, are inefficient as they often require brief energization and shutdown of the components, which can be undesirable and may lead to late detection of faults, and are influenced by aging and temperature variations.
Innovation Solution
An optoelectronic assembly with a sensor circuit that includes an energy storage unit and a detection unit, allowing for the detection of energy changes independently of the optoelectronic component's operation, enabling the identification of short-circuits without energizing the components and minimizing the impact of aging and temperature on the detection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing short-circuit detection methods are used, then short-circuits can be detected, but the optoelectronic components must be briefly energized and shut down, causing operational disturbances and late fault detection
Solution Approach 1:
The patent applies preliminary action by performing short-circuit detection during the shutdown phase before the next operating phase begins. The detection is prepared in advance during the transition period, allowing fault identification without interrupting the main operational sequence. This resolves the contradiction by enabling detection without requiring separate energization/shutdown cycles during operation.
Solution Approach 2:
The patent uses the shutdown phase as an intermediary period for detection. Instead of directly detecting during operation (which would cause disturbances) or requiring separate test cycles (which would reduce operational continuity), the shutdown phase serves as a mediator that enables detection without impacting operational continuity.
2Loss of time
If detection is performed during operation, then early fault recognition is possible, but operational disturbances occur due to brief shutdowns
Solution Approach 1:
The detection is performed as a preliminary action during the shutdown phase, preparing the system for the next operational cycle. This timing allows early fault recognition before the next operation begins, while utilizing the otherwise idle shutdown period, thus avoiding operational disturbances.
3Device complexity
If simple detection methods are used, then device complexity is reduced, but detection precision is insufficient due to influence from aging and temperature
Solution Approach 1:
The patent uses partial action by performing detection only during the shutdown phase rather than continuously. This partial timing approach maintains simple circuitry while achieving sufficient detection precision by focusing measurement resources on the critical detection moment when the system is not operating, eliminating the need for complex continuous monitoring.
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
This solution allows for reliable and cost-effective detection of short-circuits in optoelectronic assemblies before or during operation, enabling early fault recognition and minimizing disturbances from aging and temperature, thus ensuring safer and more efficient operation.
Implementation Method 1
an energy storage unit (132) and a detection unit (134), wherein the energy stored in the energy storage unit (132) is supplied independently of the electrical energy supplied to the at least one optoelectronic component (150, 180)
Implementation Method 2
The ascertainment circuit (130) is configured such that the detection unit (134) detects a change of the electrical energy stored in the energy storage unit (132) depending on a change of the energy stored in the at least one optoelectronic component (150, 180)
Data Source
AI summary
According to the present disclosure, an optoelectronic assembly is disclosed with at least one optoelectronic component, and a sensor circuit. The sensor circuit includes at least one energy supply circuit and an ascertainment circuit having at least one energy storage unit and a detection unit. The ascertainment circuit and the at least one optoelectronic component are electrically connected to one another in parallel. The at least one energy supply circuit is configured to supply electrical energy to the at least one optoelectronic component and the energy storage unit. The energy stored in the energy storage unit is supplied independently of the electrical energy supplied to the at least one optoelectronic component. The ascertainment circuit is configured such that the detection unit detects a change of the electrical energy stored in the energy storage unit depending on a change of the energy stored in the at least one optoelectronic component.