Why does the led street light have dead lights? There are two main reasons why led street lights are dead lights: the excessive leakage current of the led causes the PN junction to fail, so that the led street light does not light up. This situation generally does not affect the operation of other led lights. The internal connection lead of the led street light is disconnected, causing no current to pass through the led and causing a dead light. This situation will affect the normal operation of other led lights. How to solve the dead light of led street light?

       In the LED packaging production line, whether the grounding resistance of various equipment meets the requirements is also very important. Generally, the grounding resistance is required to be 4 ohms. In some cases with high requirements, the grounding resistance should reach ≤ 2 ohms. Excessive welding temperature will also cause the LED dead light phenomenon. The expansion coefficient of the led lead at high temperature is several times higher than the expansion coefficient at about 160℃. The internal gold wire solder joints will also be welded due to excessive thermal expansion and contraction. Click to open, causing dead light phenomenon.

Static electricity is very harmful to outdoor lighting and led street lights. There are countless electronic components damaged by static electricity in the world, causing tens of millions of dollars in economic losses. Therefore, avoiding static electricity from damaging electronic components is a very important task in the electronics industry, and LED packaging and application companies must not take it lightly. Any problem in any link will cause damage to the led, and make the led function worse or even invalid. We know that the human body (ESD) static electricity can reach about three thousand volts, which is enough to break down and damage the LED chip. In the LED packaging production line, whether the ground resistance of various equipment meets the requirements is also very important. Generally, the ground resistance is required. 4 ohms, the grounding resistance of some occasions with high requirements should reach ≤ 2 ohms.

       Human body static electricity can cause great damage to LEDs. Wear anti-static clothing and wear static rings during operation. The static ring should be grounded. There is a kind of static ring that does not need to be grounded. The effect of anti-static is not good. The wall washer manufacturer recommends If this product is not used, if the operator violates the operating rules, he should receive the corresponding warning education and also play the role of notifying others. The amount of static electricity in the human body is related to the clothes of different fabrics that people wear and each person's physique. It is easy to see the discharge between clothes when we take off clothes at night in autumn and winter. The voltage of this kind of electrostatic discharge is three thousand volts.

       Some companies use manual soldering and use a 40-watt ordinary soldering iron. The soldering temperature cannot be controlled. The soldering iron temperature is above 300-400℃. Excessive soldering temperature will also cause the LED dead light phenomenon. The expansion coefficient of the LED lead at high temperature is 160℃. The left and right expansion coefficients are several times higher, and the internal gold wire solder joints will also be pulled apart due to excessive thermal expansion and contraction, resulting in dead lights.