Static electricity from LED displays can also cause harm?

In recent years, LED display production technology has gradually matured in China, and its application fields have become widespread and popularized. However, most of the current LED display manufacturers are not fully equipped with the real ability to produce such products, which brings hidden dangers to LED display products, and even affects the entire market, static electricity is one of them. So, what is the cause of the static electricity generated by the LED display? What harm does static electricity bring to LED display production? This article will explain in detail for you.
Cause of static electricity
Microscopically, according to the theory of atomic physics, when a substance is electrically neutral, the substance is in an electrical equilibrium state. Because of the gain and loss of electrons generated by the contact of electrons of different substances, the substance loses its electrical balance and generates an electrostatic phenomenon.
From a macroscopic point of view, the causes are: friction between objects, heat generation, excitation of electron transfer; contact and separation between objects to produce electron transfer; electromagnetic induction causes an imbalance in the surface charge of the object; the combined effect of friction and electromagnetic induction.
The electrostatic voltage is generated by the contact and separation of different kinds of substances. This effect is known as triboelectric charging, and the voltage generated depends on the nature of the material itself that rubs against each other. Since the LED display screen is mainly in the actual production process, the direct contact and indirect contact between the human body and the related components generate static electricity. Therefore, according to the characteristics of the industry, some targeted static precautions can be taken.
The harm of static electricity in the production process of LED display
If you ignore anti-static at any point in production, it will cause the electronic device to malfunction or even damage it.
When semiconductor devices are placed alone or loaded into a circuit, permanent damage to these devices may occur due to static electricity even if power is not applied. As we all know, LED is a semiconductor product. If the voltage between two pins 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 the driver IC to static electricity, such as the lack of solder, the quality of the solder itself, etc., which can cause serious leakage paths and cause devastating damage.
Another type of failure is caused by the temperature of the node exceeding the melting point of semiconductor silicon (1415 ° C). The pulse energy of static electricity can generate localized heat, so there is a direct breakdown of the lamp and the IC. This failure occurs even if the voltage is lower than the breakdown voltage of the medium. A typical example is that the LED is a diode composed of a PN junction, and the breakdown between the emitter and the base causes a sharp drop in current gain. After the LED itself or the IC in the driver circuit is affected by static electricity, functional damage may not occur immediately. These potentially damaged components are usually displayed during use, so the life of the display is affected. It is fatal.

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