Reasons for static electricity of LED electronic display:
From a macro point of view, the reasons are: friction between objects generates heat, which stimulates electron transfer; contact and separation between objects produce electron transfer; electromagnetic induction causes an unbalanced distribution of charges on the surface of an object; the combined effect of friction and electromagnetic induction.
From a microscopic point of view, according to the theory of atomic physics, matter is in a state of electrical equilibrium when it is electrically neutral, and the gains and losses of electrons generated by the contact of different matter electrons cause the matter to lose electrical balance and generate static electricity.
Electrostatic voltage is generated by the contact and separation of different kinds of substances. This effect is known as triboelectricity, and the voltage generated depends on the characteristics of the materials rubbing against each other. Because the LED electronic display screen is mainly in direct and indirect contact between the human body and related components in the actual production process, static electricity is generated. Therefore, according to the characteristics of the industry, we can take some targeted electrostatic prevention measures.
The harm of static electricity in the production process of LED electronic display:
If anti-static is neglected in any aspect of production, it will cause electronic equipment to malfunction or even damage it.
When semiconductor devices are placed alone or in a circuit, even if they are not powered on, static electricity may cause permanent damage to these devices. As we all know, LEDs are semiconductor products. If the voltage between two or more pins of the LED exceeds the breakdown strength of the component medium, it will cause damage to the component. The thinner the oxide layer, the greater the sensitivity of the LED and driver IC to static electricity.
Another type of failure is caused when the temperature of the node exceeds the melting point of semiconductor silicon (1415°C). The pulse energy of static electricity can generate local heat generation, so there is a direct breakdown of the lamp and IC. This failure will occur even if the voltage is lower than the breakdown voltage of the medium. After the LED itself or the ICs in the drive circuit are affected by static electricity, functional damage may not occur immediately. These potentially damaged components usually only appear during use, so the life of the display screen will be affected. Is fatal.
