LED dead lights mainly due to the following two points:
1) leakage current flowing through the LED caused by the failure of the LED light point PN junction, not bright, this situation generally does not affect the other LED lights work
2) the internal connection of the LED lamp off, causing the LED no current through the death of lights, this situation will affect the normal operation of other LED lights,
How to prevent the death of LED lights?
Static electricity for LED lamp is a great harm to the devil, the world because of electrostatic damage to the electronic components of countless, resulting in tens of millions of dollars in economic losses. So to prevent electrostatic damage to electronic components, electronic industry, an important work, LED packaging and application of enterprises must not be taken lightly. Any link out of the problem, will cause damage to the LED, so that the performance of LED worse or even failure. We know that human body static (ESD) can reach 3000 volts or so, can be led chip breakdown, in LED packaging production line, the equipment of various types of ground resistance whether it meets the requirements, this is also very important, the general requirements for the grounding resistance is a 4 ohm, and some demanding the grounding resistance even to reach less than or equal to 2 ohm. Dedecms copyright
Human body electrostatic damage to the LED is also great, work should wear anti electrostatic clothing, equipped with electrostatic ring, good electrostatic ring should be grounded, a don't need grounding electrostatic ring anti electrostatic effect is not good, not recommended for use with the kinds of products, if the staff in violation of the operating rules, accept the respective warning education, as well as to notice of others. Human body electrostatic, and people wear different clothes, fabrics, and every man's physique, autumn and winter night we undressed it was easy to see discharge phenomenon between the clothes, the electrostatic discharge voltage have 3000 volts.
Some companies use manual welding, using a 40 Watt ordinary iron, beyond the control of welding temperature, solder iron temperature in more than 300 to 400 DEG C, high welding temperature will cause dead lights, LED lead at high temperature expansion coefficient than in about 150 DEG C expansion coefficient high several times, the internal gold wire solder joints will because of thermal expansion and contraction welding point opened, resulting in dead lights phenomenon.
In view of the above phenomenon, LED packaging manufacturers and LED lighting manufacturers should develop strict LED standard manual, in the production process to prevent the occurrence of the phenomenon of on-line.
