Multi-LED Component Parallel Strings with Series Fuses
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Solution Overview
Problem
Inorganic light-emitting diode (LED) systems face issues with manufacturing defects leading to excessive current conduction, overheating, and inconsistent light emission, which existing solutions often address through complex circuits or redundant components that are costly and inefficient.
Innovation Solution
A multi-LED component design featuring LEDs connected in parallel with fuses in series, allowing for controlled current flow and easy detection and repair of defective LEDs, ensuring reliable operation and efficient light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex current control circuits or redundant components are used to address manufacturing defects, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The invention divides the LED system into multiple parallel-connected LED strings, where each string contains multiple LEDs. This segmentation allows defective LEDs to be isolated within individual strings while other strings continue to function, improving reliability without requiring complex control circuits for each LED.
Solution Approach 2:
Multiple LEDs are combined into parallel-connected strings that share common electrical connections. This merging approach enables the system to tolerate individual LED failures while maintaining overall functionality, achieving reliability improvement without proportionally increasing device complexity.
2Temperature
If complex current control circuits are used to prevent overheating, then temperature control is improved, but device complexity increases
Solution Approach 1:
By segmenting the current path into multiple parallel LED strings, the invention distributes the total current across multiple pathways. This segmentation naturally limits the current through each individual LED, preventing overheating without requiring active temperature control circuits.
Solution Approach 2:
The parallel string configuration provides self-regulating current distribution. When LEDs fail or have varying characteristics, the current automatically redistributes among the remaining functional LEDs in the system, providing passive thermal management without complex control circuits.
3Reliability
If redundant light emitters are used to replace defective elements, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The invention segments the LED array into multiple independent parallel strings during manufacturing. This segmentation allows for simpler manufacturing processes where strings can be assembled and tested independently, reducing manufacturing complexity and cost while inherently providing redundancy.
Solution Approach 2:
The parallel string architecture allows defective LEDs to be effectively 'discarded' from service while the system continues operating with remaining functional LEDs. This approach provides fault tolerance without requiring active replacement mechanisms, reducing manufacturing cost compared to systems with active redundancy management.
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
The solution provides a robust and cost-effective means to manage excessive current and faulty LEDs, maintaining performance and reducing manufacturing defects, while enabling simple detection and repair of defective components.
Implementation Method 1
An undesired increase in current can also overheat the LEDs
Implementation Method 2
providing a fuse in series with the LED that renders the defective LED nonconductive
Implementation Method 3
Each LED includes first and second LED contacts for providing power to the LED to cause the LED to emit light
Implementation Method 4
provide power to the LED to cause the LED to emit light
Data Source
AI summary
A multi-LED component comprises a component substrate comprising a common electrode, a first electrode, a second electrode, a plurality of first LEDs, and a plurality of second LEDs all disposed on the component substrate. Each first LED and each second LED comprises first and second LED contacts for providing power to each corresponding LED to cause the LED to emit light. The first LED contact of each first LED and each second LED is electrically connected to the common electrode. The second LED contacts of the first LEDs are electrically connected to the first electrode. The second LED contacts of the second LEDs are electrically connected to the second electrode so that the first LEDs are electrically connected in parallel and the second LEDs are electrically connected in parallel.