With the continuous development of science and technology, more and more sophisticated electronic components. We know that the more sophisticated electronic products, the greater the pressure on the safety and stability challenges, and static electricity is very fatal to electronic products.
So how does static electricity come about? From the microscopic point of view, according to the theory of atomic physics, the material is neutral in the electrical balance state, due to the contact of different substances produced electrons gains and losses, so that the material lost electrical balance, resulting in electrostatic phenomena.
From the macroscopic point of view, the reasons are: friction between objects, excited electron transfer; contact and separation between objects produce electron transfer; electromagnetic induction caused by the surface of the object charge imbalance; friction and electromagnetic induction of the combined effect.
The electrostatic voltage is generated by the contact and separation of the different species of matter. This effect is known as the friction of the electrification, the voltage generated by the friction between the material itself depends on the characteristics. As the LED display in the actual production process is mainly the human body and the direct contact with the relevant components and indirect contact with static electricity. So according to the characteristics of the industry we can do some targeted electrostatic precautions.
If you ignore the anti-static in any part of the production, it will cause the electronic equipment to malfunction or even damage it. When the semiconductor devices are individually placed or loaded into the circuit, static electricity may cause permanent damage to these devices, even if no power is applied. We are familiar with, led is a semiconductor product, if the led two pins or more between the voltage exceeds the component dielectric breakdown strength, it will cause damage to the components.
The thinner the oxide layer, the greater the sensitivity of the led and driven ic to static electricity, such as solder is not full, the quality of the solder itself is a problem, etc., will have a serious leakage path, resulting in devastating damage.
Another failure is caused by the fact that the temperature of the node exceeds the melting point of the semiconductor silicon (1415 ° C). Electrostatic pulse energy can produce local local heat, so there is a direct breakdown of the lamp and ic failure. This failure can occur even if the voltage is lower than the breakdown voltage of the medium.
led by the composition of the diode pn, the emitter and the base of the breakdown will make the current gain drastically reduced. led itself or the drive circuit in the ic by the impact of static electricity, it may not immediately functionally damaged, these potentially damaged components are usually used in the process will be shown, so the impact of the life of the display are Is fatal.
Therefore, the installation and use of LED electronic screen in the process, the environmental humidity and temperature changes should be given enough attention, Bingzhuo prevention first, strengthen management, strict inspection ideas to ensure the normal use of LED electronic screen.