BURN-IN TESTS

We follow up our quality procedures from the very beginning of the production steps to their end in order to provide customer satisfaction and to make EAE quality sustainable. Within this scope, we take our luminaires, which are ready to be sent to the end user, from the production line and put them to the burn-in test prior to their packing.

The purpose of these tests is to detect the possible component and production-based electronic failures of our luminaires. Possible failures generally stem from LED, driver unit and LED module. [1]

LED: The unit becomes stable by reaching to nominal operation temperature and performance within a short period as 1 minute from the first operation. The production-based failures, if any, visually arise after the unit is stable [3] . Usually the chips that are unable to radiate properly damage homogeneous radiation pattern throughout the luminaire and may be easily detected even by naked eye. Though not so frequently, it is detected that some products show CCT change during burn-in tests

Driver Unit: The unit becomes stable by reaching to nominal operation temperature and performance within 2 hours generally from the first operation [2] . It may cause the luminaire to fade out by failing if there is a production based defects after it is stable. If there are fluctuations at the driver output signal, the luminaire may flicker in a manner to be detected by naked eye and it may be easily detected.

LED Module: Defects such as partial flashing or no flashing of luminaires are detected in burn-in tests at times due to possible errors in strings of LED modules. White top mask color tones of PCBs may vary due to the producers and it directly affects radiation CCT value of luminaire. LED modules in luminaires in which color differences are detected in burn-in tests are checked and such problems are prevented.


 SSL Reliability Management (Luminaire Design, Component, Final Assembly and Test), 2011 [4]

 

 

References

  1. Alliance, Next Generation Lighting Industry; Energy, U. S. Department of. (2011). LED LUMINAIRELIFETIME: Recommendations for Testing and Reporting. Washington: OFFICE of ENERGY EFFICIENCY & RENEWABLE ENERGY.
    https://www1.eere.energy.gov/buildings/publications/pdfs/ssl/led_luminaire-lifetime- guide_june2011.pdf
  2. Inventronics. (2020, September 30). Durations for Stable Operation of Inventronics LED Drivers.
    Inventronics.
  3. Samsung LED. (2020, September 29). Study On Lumen and Vf Stabilization of 2835 and 3030 LED Packages.
    Samsung LED, Korea.
  4. (2011).SSL Reliability Management (Luminaire Design, Component, Final Assembly and Test). LED LUMINAIRE LIFETIME: Recommendations for Testing and Reporting. Taken from Appalachian Lighting Systems. https://www1.eere.energy.gov/buildings/publications/pdfs/ssl/led_luminaire- lifetime-guide_june2011.pdf
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