LED has unique advantages, but it is a fragile nature semiconductor product, so we should be cautious when using LED products. I now supply LED Cautions for everyone to learn. Please give highly attentions when in use:

　(1) Use a DC power supply

Some manufacturers use “RC Buck” to power LED products in order to reduce product costs. This will directly affects the life of LED products. Using a dedicated switching power supply (preferably a constant current source) to power LED products will not affect the life of the product, but the product cost is relatively high.

　　(2) Anti-static measures should be done

Certain anti-static measures must be taken in the processing and production process of LED products, such as: the workbench to the ground, workers wear anti -static clothing, anti-static belt loop as well as with anti-static gloves, etc. Anti-static ion fans can be installed in places with conditions, but it must also be ensured that the humidity of the workshop is around 65 % so that the air will not be too dry to produce static electricity, especially the green LED is relatively much easier to be damaged by static electricity. In addition, the antistatic ability of different quality grades of LED is not the same. LED with high quality grade has stronger antistatic ability.

Maybe a lot of people knowing little about the static, I am here to explain in detail the static knowledge: the substance of static is the existence of residual electrostatic charge. Electrostatic charge is the physical nature of the static phenomenon. In English it is called ESD. Those related amounts of electric potential, electric field, current, etc. are all generated by the physical presence or movement of the charge. Many static problems occur because people do not have ESD awareness. Even now a lot of people would suspect that ESD will cause damage to electronic products. This is because most of the ESD damage occurs beyond the feeling of people. The perception voltage of the human body to electrostatic discharge is about 3KV, but many electronic components will damage in tens or even hundreds of volts. Generally the electronic devices damaged by ESD have no clear boundaries. Mounting those components on the PCB to re-test, the results will have a lot of problems and the analysis is quite difficult, especially the potential damage. Even use precision instruments can hardly measure the significant change of the performance. Therefore, many electronic engineers and designers are skeptical of ESD. Experiments in recent years have confirmed that with this potential damage after a certain period of time, the reliability of the electronic products decreased significantly.