How to identify the quality of LED display beads
1, look at the solder joints. The regular LED lamp tape manufacturer produces LED lamp tape using SMT patch process, solder paste and reflow soldering process.
2, look at the quality of FPC. There are two kinds of copper foil in FPC: copper clad and calendered. The copper foil on the copper clad sheet is protruding. If you look closely, you can see the connection between the pad and FPC.
3, look at the cleanliness of the surface of the LED lamp. If the SMT process is used to produce LED lamp strip, its surface cleanliness is very good, no impurities and stains can be seen.
4. Look at the chips and processes used for LED lights. You can't tell the difference with your eyes. Use aging equipment and testing equipment. If you put several manufacturers'LEDs on the aging device and use high current for 24 hours or more, you can measure the brightness of several manufacturers' LEDs and see which one has the least and the most attenuation. The small one is the best.