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directly determine the quality of LED lights with good or bad
Time:2012-12-20

 

led lights with the production because the threshold into the low, so many people who launched this project. But those who have experience or a way to identify, regular producers and the production of led lights with led lights with cottage version (ie within the rental depends on the products produced by manual operation) is a glance from the appearance out. Here to talk about how their eyes to identify the led lights with the quality of the good or bad:


1, see spot. led lamp with a regular manufacturer of led lights with the production of SMT chip technology is used, with solder paste and reflow process production. Therefore, led lights to bring the volume of solder joints with smooth and not many joints cylindrical arc from the FPC pad at the extension to the led electrodes. The cottage version of led lights with the uniform amount of solder joints, mostly a dot wrap welding foot, and have different levels of tin tip appeared, which is a typical phenomenon of manual welding.


2, see FPC quality. FPC copper and rolled copper sub-deposited two, Bonded Copper of copper foil is projecting, and look with the FPC, then the connection from the pad at the seen. Copper is the calendar closely, and FPC as a single entity, and can bend and will not appear any pad off phenomenon. Bonded Copper will appear if the pad bending too much off, when the temperature is too high maintenance can also cause the pad off.


3, see led lights with the surface cleanliness. If the use of SMT technology, the led lights, its surface cleanliness is very good, do not see any impurities and dirt. However, if hand-welding technology, the cottage version of led lights, no matter what the surface cleaning, and cleaning will be residual traces of the stain, while the surface of the FPC will be flux residue and solder residue.


4, look at packaging. led lights with the regular use of anti-static volume will reel packaging, usually 5 meters a roll or a roll of 10 meters, and then use anti-static moisture out and then seal bag. The cottage version of the led light with because of cost savings, while the use of recycled paper trays, and then there is no proof anti-static bags, look carefully to see the appearance of paper trays with clear labels and scratch marks left behind.


5, see label. led lights with regular paper trays bags and above will have a printed label, not the printed labels. The cottage version of the label is printed, while the specifications and parameters are not uniform.


6, see annex. led lamp with a regular there in the box with lights attached instructions and specifications, while also equipped with led lights with a connector or a deck; and cottage version of the led lights inside the box with no these attachments, as Some manufacturers, after all, could save the province.

 

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