Testing PCB LED Light Quality? Here’s a bright idea.
Client Challenge
An LED light manufacturer required an in-line production tester to ensure the quality of LED PCBAs assembled via Surface Mount Technology (SMT). Key requirements included:
- Validation of brightness (lumens), color rendering index (CRI), and color temperature.
- Semi-automated operation to minimize manual handling while fitting seamlessly into the SMT workflow.
- Integration with the factory’s automation databases for production tracking and real-time data analysis.
- Remote data transmission to the client’s headquarters for operational monitoring.
- A budget-conscious solution adaptable to future products and efficient to maintain.
Additionally, the system needed to allow operators to quickly swap DUT fixtures during SMT line changeovers.
Our Solution
We delivered a cost-effective, scalable test system designed to meet the client’s needs:
- Innovative Fixture Design:
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- Developed a drop-in fixture-style tester using a bed-of-nails interface to power and test the DUT.
- Enabled quick and easy fixture swaps during line changeovers, minimizing production downtime.
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- Accurate Light Measurement at a budget:
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- Implemented a reference light measurement system that compared each DUT against a known good sample.
- Ensured accuracy in measuring lumens, CRI, and color temperature for consistent product quality.
- Didn’t use expensive integrating spheres and photometers to make extremely precise measurements as they weren’t needed to validate performance on a production line.
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- Seamless Integration and Data Management:
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- Integrated with the factory’s automation databases to streamline data collection and tracking.
- Enabled remote monitoring of test operations by transmitting data directly to the client’s headquarters.
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- Cost-Efficient and Future-Ready:
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- Designed the tester to front-load Non-Recurring Engineering (NRE) costs, making it inexpensive to maintain and adaptable for future products.
- Facilitated remote development and deployment of new fixtures, eliminating the need for on-site visits to the Contract Manufacturer (CM).
Results
Efficiency
Reduced downtime during SMT line changeovers with operator-friendly fixtures.
Enhanced Quality Control
Delivered reliable light measurement for consistent production standards.
Remote Flexibility
Allowed centralized monitoring and remote maintenance, cutting operational costs.
Scalable Solution
Prepared the client for future product lines with a cost-conscious, modular approach.