What are the general reasons why the LED explosion-proof lamp does not light up

What are the general reasons why the LED explosion-proof lamp does not light up? 1. Static electricity damages the LED chip, causes the PN junction of the LED chip to fail, and the leakage current increases, turning into a resistance. Static electricity is a very harmful devil. There are countless electronic components damaged by static electricity all over the world. Economic losses of tens of millions of dollars. Therefore, preventing 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 performance of the LED deteriorate or even fail. Second, the LED lamp bead is soldered. The LED lamp bead is not firmly welded. Use a lighter to heat the LED lead to -℃, remove the lighter, and connect the positive and negative electrodes with a button battery. LED, if the LED light can be lit at this time, but the LED light changes from bright to off as the lead temperature decreases, this proves that the LED light is a virtual welding. The reason why the heating can light up is to use the principle of metal thermal expansion and contraction. When the LED lead is heated, the expansion and extension is connected to the internal solder joints. At this time, the power is turned on, the LED can normally emit light, and the LED lead shrinks as the temperature drops. After returning to the normal temperature state and disconnecting from the internal solder joints, the LED light will not light up. This method is effective after repeated attempts. Third, the excessive leakage current of the LED causes the failure of the PN junction and the LED lamp does not light up. This situation generally does not affect the operation of other LED lamps; fourth, the internal connection lead of the LED lamp is disconnected, causing no current to pass through the LED If a dead light occurs, this situation will affect the normal operation of other LED lights. The reason is that the working voltage of the LED light is low (red, yellow, orange LED working voltage.V—.V, blue, green and white LED working voltage.—.V) Generally, it must be connected in series and parallel to adapt to different operating voltages. The more LED lights in series, the greater the impact. As long as one of the LED lights is open, the entire string of LED lights in the series circuit will not be On, it can be seen that this situation is much more serious than the first situation. There are many general reasons why LED explosion-proof lights do not light up, and everyone should try to avoid them.