1、 What is the LED electrostatic measurement principle and process of LED breakdown and harmed by electrostatic?
LED belongs to the semiconductor components, the PN junction is directly exposed to the outside, it is very easy to suffer electrostatic. When the charge of different polarity in LED two electrodes (induction charge or transferred charge) accumulates to a certain extent, and not release in time, the charge energy once exceeds the maximum value of LED chips, the charge will be discharged in very short moment (nanosecond) between two electrodes in LED layers, generating high temperature above 1400℃ between the conductive layers(often the minimum resistance, electrode periphery position), result in the leakage, dark and dead lights, electric phenomenon.
This electrostatic energy of the breakdown LED is not a high voltage, academically speaking it is energy, it depends on the two core coefficient of the quantity of electric charge and the length of released time. The time of discharge is shorter and the power is larger, more charge and more powerful. Electrostatic breakdown of LED is a very complex process, therefore, the simulation design when test LED anti-static is also a very complex, strict test (LED lamp test).
2、 After LED is broken and hurt by electrostatic, is there any badness?
Breakdown LED is often dead light, leakage if it is serious. Slight electrostatic damage, LED generally is not unusual, but at this time, there have some problems of the LED, when it is two times of electrostatic damage, it will appear dark and brightness, dead lights and leakage increased.