What is the cause of the crystal display? What is the harm caused by the production of static electricity to the led display? In recent years, led display production technology in China is becoming more mature, widely used and become a trend of popularity. But most of the current led display manufacturers are not fully equipped with the true capacity of the production of such products, which led the display products to bring hidden dangers, and even affect the entire market.
Cause of static electricity:
From the microscopic point of view, according to the theory of atomic physics, when 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 charge of the unbalanced distribution; friction and electromagnetic induction of the combined effect.
The electrostatic voltage is generated by the contact and separation of the different kinds of substances. 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 body and the relevant components of the direct contact with the indirect contact with static electricity. So according to the characteristics of the industry we can do some targeted electrostatic precautions. Static electricity in the led display production process of harm
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 device is placed or loaded separately, even if no power is applied, static damage to these devices may result from static electricity. We are familiar with, led is a semiconductor product, if the led two pins or more pins between the voltage exceeds the breakdown strength of the component media, it will cause damage to the components. The thinner the oxide layer, the greater the sensitivity of the lead and drive ic to static electricity, such as solder is not full, the quality of solder itself is a problem, etc., will have a serious leak 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.
A typical example is that the lead is a diode consisting of a pn junction, and the breakdown between the emitter and the base causes a sharp decrease in the current gain. led itself or the drive circuit in the ic by the impact of static electricity, it may not immediately appear functional damage, 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.
So the installation and use of the led display 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 display.