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.

　　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.