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What tests are required for qualified in-line LED lamp beads

time:2021-09-28 Views:19


What tests do qualified direct-plug LED lamp beads need to go through? Now, let’s take a closer look with the editor of the infrared pair tube manufacturer.

   1. Optical and electrical performance test; forward voltage drop, reverse current; luminous flux, spectrum, color temperature, CRI and luminous angle.

  2. Lens: Identify the type of encapsulation glue and detect whether there are contaminants and bubbles.

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  3, phosphor coating; phosphor particle size, particle size distribution, composition, detection of agglomeration and sedimentation.

  4. Chip: Measurement of the microstructure of the chip, identification of pollutants, and whether there is leakage and damage.

  5. Wire bonding: one-time welding and two-time welding morphology observation, arc height measurement, diameter measurement, and lead component identification.

  6. Die-bonding process: Whether the die-bonding layer has voids, delamination and composition of the die-bonding layer.

  7. Support: Evaluation of coating process, composition of support, composition of coating, thickness of coating.


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