Led lighting manufacturers to introduce how to identify the led quality
produce LED lights for stepped into the threshold low, so a lot on this project. But have experience, or is there a way to identify normal produce, produce LED lamp belt and shanzhai LED lamp belt ( Namely in the rental housing by artificial operation produces the product) Is to be able to visually one soon. Below the product of manufacturer of led lights, for example, to talk about how to identify quality of led lights with eyes:
normal led lights belt can choose anti-static coil disc packaging, usually 5 meters a roll or 10 meters a roll, and then the outside use anti-static moisture-proof packaging seal. The shanzhai leds will bring because of cost savings, and choose back coil plate, then no anti-static moisture-proof packaging bags, see coil plate can see appearance to remove labels left traces and scratches.
normal LED lights belt bags will be printed labels and coil plate, rather than the printed label. And copycat version of the label is printed, specifications and parameters.
normal LED lights inside the belt will be included in the enclosed instructions and lamp with specification, also equipped with leds together with the connector or booth; The shanzhai leds with boxes would not have these attachments, because they can save a province.
the solder joints
normal leds with produce, produce LED lamp belt is made of SMT process, produced by solder paste and reflow soldering process. Thus, LED lights belt solder joints are smooth and solder amount not much, solder joint circular arc shaped from the FPC welding plate electrode to LED in extension. Amount of solder solder and shanzhai leds with uneven, is one more dot encase leg, together will have different degree of icicles, this is a typical phenomenon of manual welding.
the FPC quality
FPC divide into two kinds, apply copper and rolling of copper coated copper copper foil is out, scan it can see it from the joint of welded plate and FPC. And rolling of copper is close and FPC is an organic whole repeatedly, can bend without any welding plate drop phenomenon. Apply copper if bent too much will present welding plate drops, repair when temperature is too high can cause welding plate drops.
the leds appearance of cleanliness. If choose SMT process produces LED lamp belt, the appearance of cleanliness is very good, can't see any impurities and stain. But if use hand soldering process of shanzhai LED lights belt, no matter how clean the appearance, will remain with traces of the stain and cleaning, together in FPC appearance will help to residual flux and tin slag.